CN111120293A

CN111120293A - Four-way low-damping double-acting one-way valve

Info

Publication number: CN111120293A
Application number: CN201911387285.8A
Authority: CN
Inventors: 征文赋; 钱小刚; 嵇鹏
Original assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Current assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-05-08
Anticipated expiration: 2039-12-27
Also published as: CN111120293B

Abstract

The invention provides a four-way low-damping double-acting one-way valve which is of an integrated structure and is provided with an upper discharge port one-way valve with an upper discharge one-way check function and a lower feed port one-way valve with a lower feed one-way check function.

Description

Four-way low-damping double-acting one-way valve

Technical Field

The invention relates to the field of one-way valves, in particular to a four-way low-damping double-acting one-way valve applied to a sludge pump.

Background

The hydraulic piston type sludge pump sewage pump in the current market adopts a hydraulic oil cylinder as a power cylinder to drive a working cylinder piston to move, an inlet and an outlet adopt tee joints, and two one-way valves are respectively installed as an inlet one-way check valve and an outlet one-way check valve; the inlet and outlet one-way valves are in an angle general form, namely the inlet and the outlet of the one-way valve are 90 degrees, and materials are easy to generate turbulence in the transmission process; a charging barrel of the working cylinder is not provided with a cooling system, and heat generated in the operation of equipment cannot be conducted and dissipated in time, so that a sealing element of the piston of the working cylinder is aged and loses efficacy; when the hydraulic oil cylinder is used as a power cylinder and is used for reversing, the installation position of the reversing device is fixed, and the collision between a piston and two end covers is easily caused due to the motion inertia and the hysteresis of a reversing valve.

Disclosure of Invention

The invention aims to provide a four-way low-damping double-acting one-way valve which can be used for a sludge pump, improves the operation efficiency of the sludge pump, reduces the processing and manufacturing cost, reduces the size of the whole machine and reduces the installation site.

In order to achieve at least one of the above objects, the present invention provides a four-way low damping double-acting check valve, which is an integrated structure and has an upper discharge port check valve with an upper discharge one-way check and a lower feed port check valve with a lower feed one-way check, wherein a material directly enters through the lower feed port check valve and is directly discharged through the upper discharge port check valve.

In some embodiments, the four-way low-damping double-acting check valve comprises a four-way valve body, the four-way valve body is an integrated four-way valve body, a straight-through upper discharge port check valve is arranged inside an upper opening of the four-way valve body, a straight-through lower feed port check valve is arranged inside a lower opening of the four-way valve body, and the straight-through upper discharge port check valve and the straight-through lower feed port check valve of the four-way low-damping double-acting check valve are opened and closed alternately.

In some embodiments, the upper port and the lower port of the four-way valve body are respectively connected with the discharge collecting pipe and the feed dividing pipe.

In some embodiments, the middle port of the four-way valve body is connected with the working material cylinder, and the other middle port is fixedly connected with the double-acting hydraulic oil cylinder.

In some embodiments, the middle port of the four-way valve body of the four-way low-damping double-acting one-way valve is connected with a rod cavity of a sludge cylinder working material cylinder and used as a rod cavity end cover of the sludge cylinder working material cylinder.

In some embodiments, the outer circle positioning step at one end of the four-way valve body is provided with a sealing element and is installed in an inner hole at the end part of the sludge cylinder working material cylinder for static sealing.

In some embodiments, the sludge cylinder working material cylinder is sleeved with a sludge cylinder external protection cylinder, and the middle opening of the four-way valve body is connected with the sludge cylinder external protection cylinder at one end of the rod cavity of the sludge cylinder working material cylinder through a flange to serve as a rod cavity end cover of the sludge cylinder working material cylinder.

In some embodiments, the inner bore of one end of the four-way valve body is provided with a sealing device and is in sliding seal with a piston rod of a double-acting hydraulic oil cylinder extending into the bore of the four-way valve body.

In some embodiments, the four-way low damping double-acting check valve further comprises a four-way valve body discharge port valve core, a four-way valve body discharge port valve core seat, a four-way valve body discharge port valve core sealing gasket, a four-way valve body feed port valve core and a four-way valve body feed port valve core sealing gasket, wherein the four-way valve body discharge port valve core seat is arranged in the upper opening inner hole of the four-way valve body, the four-way valve body discharge port valve core is arranged in the inner hole of the four-way valve body discharge port valve core seat in a sliding fit manner, the four-way valve body discharge port valve core sealing gasket is arranged on the inner hole step of the four-way valve body below the four-way valve body discharge port valve core, wherein the valve core of the feed inlet of the four-way valve body is arranged in the inner hole of the valve core seat at the upper part of the feed inlet of the four-way valve body in a sliding fit manner, the four-way valve body feed inlet valve core sealing gasket is arranged on an inner hole step of the four-way valve body below the four-way valve body feed inlet valve core.

In some embodiments, wherein the downward movement of the four-way valve body outlet spool compresses the four-way valve body outlet spool seal to close the outlet, the upward movement of the four-way valve body inlet spool disengages the four-way valve body inlet spool seal to open the inlet.

In some embodiments, the four-way low damping double-acting one-way valve is arranged at the end of a sludge cylinder of the hydraulic sludge pump.

In some embodiments, wherein the hydraulic sludge pump is a two-cylinder two-feed hydraulic piston pump or a single-cylinder two-feed hydraulic piston pump.

In some embodiments, the hydraulic sludge pump comprises a double-acting hydraulic oil cylinder and two sludge cylinders, wherein the two sludge cylinders are respectively arranged at two ends of the double-acting hydraulic oil cylinder, and the end part of at least one sludge cylinder is provided with the four-way low-damping double-acting one-way valve.

In some embodiments, wherein the hydraulic sludge pump comprises a double acting hydraulic ram and a sludge cylinder, wherein the sludge cylinder is connected to the double acting hydraulic ram.

Compared with the prior art, the invention has the beneficial effects that: the four-way low-damping double-acting one-way valve has an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return, is used as a sealing end cover of a rod cavity of a working material cylinder, and has the functions of sliding sealing with a double-acting piston rod extending into a hole of the working material cylinder and connecting with a middle double-acting hydraulic oil cylinder. The upper discharge port one-way valve and the lower feed port one-way valve are both in a straight-through structure, materials directly enter the sludge cylinder working material barrel from the feed flow dividing pipe through the straight-through lower feed port one-way valve, the movement distance is short without passing through other pipelines and elbows in the middle, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the material directly gets into ejection of compact collecting pipe from work feed cylinder through straight-through type upper discharge gate check valve, and the centre need not to pass through other pipelines and elbow movement distance short and do not change the flow direction and do not produce the little operating efficiency height of torrent resistance.

Drawings

Fig. 1 is a schematic perspective view of the four-way low-damping double-acting check valve applied to a double-cylinder double-feed hydraulic piston pump according to a first preferred embodiment of the invention.

Fig. 2 is a schematic perspective view of the four-way low-damping double-acting check valve applied to a single-cylinder double-feed hydraulic piston pump according to a second preferred embodiment of the invention.

Detailed Description

For the purpose of promoting an understanding of the invention, reference will now be made in detail to the embodiments illustrated in the drawings. The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are intended to be illustrative only and not limiting, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention. Based on the understanding of the principle of the present invention, those skilled in the art can obtain other drawings and other embodiments without creative effort, and the scope of the present invention is covered by the claims.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

The invention discloses a four-way low-damping double-acting one-way valve which is an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return, is used as a sealing end cover of a rod cavity of a working charging barrel, and has the functions of sliding sealing with a double-acting piston rod extending into a hole of the working charging barrel and connecting with a middle double-acting hydraulic oil cylinder. The upper discharge port one-way valve and the lower feed port one-way valve are both in a straight-through structure, materials directly enter the sludge cylinder working material barrel from the feed flow dividing pipe through the straight-through lower feed port one-way valve, the movement distance is short without passing through other pipelines and elbows in the middle, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the material directly gets into ejection of compact collecting pipe from work feed cylinder through straight-through type upper discharge gate check valve, and the centre need not to pass through other pipelines and elbow movement distance short and do not change the flow direction and do not produce the little operating efficiency height of torrent resistance.

The four-way low-damping double-acting one-way valve is widely applied and can be applied to various sludge pumps, such as hydraulic piston type sludge pumps. It will be understood by those skilled in the art that the application of the four-way low damping double-acting check valve of the present invention is not limited to the hydraulic piston type sludge pump of the present invention, but may be applied to other types of sludge pumps, and the present invention is not limited in this respect.

As shown in fig. 1, the four-way low-damping double-acting check valve according to the first preferred embodiment of the present invention is installed on a dual-cylinder dual-feed hydraulic piston pump, and the four-way low-damping double-acting check valve enables the dual-cylinder dual-feed hydraulic piston pump to have high operation efficiency, low power loss, extremely low suction and discharge damping, compact size, convenient installation, maintenance, energy saving and environmental protection.

In this first preferred embodiment of the invention, the four-way low damping double acting check valve is implemented as a left sludge cylinder four way low damping double acting check valve 1203 of the left sludge cylinder 1200 of the twin cylinder dual feed hydraulic piston pump and a right sludge cylinder four way low damping double acting check valve 1302 of the right sludge cylinder 1300 of the twin cylinder dual feed hydraulic piston pump. It will be understood by those skilled in the art that in other variations of the first preferred embodiment of the present invention, the four-way low damping double acting check valve may have other modes in the setting position of the dual cylinder dual feed hydraulic piston pump, and the present invention is not limited in this respect.

Specifically, in this preferred embodiment of the present invention, the double cylinder dual feed hydraulic piston pump comprises a dual acting hydraulic cylinder 1100, a left sludge cylinder 1200 and a right sludge cylinder 1300, the left sludge cylinder 1200 being mounted at the left end of the dual acting hydraulic cylinder 1100 and the right sludge cylinder 1300 being mounted at the right end of the dual acting hydraulic cylinder 1100.

Specifically, the double acting hydraulic ram 1100 includes a cylinder 1101, a cylinder flange, a double acting hydraulic ram piston rod 1102, a damper plunger, a first guide sleeve 1103, and a second guide sleeve 1107. Further, the double-acting hydraulic oil cylinder piston rod 1102 and the buffer plunger are assembled in the cylinder barrel 1101, the first guide sleeve 1103 is installed at the left end of the cylinder barrel 1101, the second guide sleeve 1107 is installed at the right end of the cylinder barrel 1101, a piston of the double-acting hydraulic oil cylinder piston rod 1102 is in sliding sealing fit with an inner hole of the cylinder barrel 1101, and a piston rod of the double-acting hydraulic oil cylinder piston rod 1102 is in sliding sealing fit with inner holes of the first guide sleeve 1103 and the second guide sleeve 1107.

Specifically, the double-cylinder double-feed hydraulic piston pump further comprises a discharge manifold 1400 and a feed shunt pipe 1500, wherein the discharge manifold 1400 and the feed shunt pipe 1500 are installed on the left sludge cylinder 1200 and the right sludge cylinder 1300. Further, the discharge collecting pipe 1400 is connected to the discharge ports of the left sludge cylinder 1200 and the right sludge cylinder 1300 through flanges, and the feed dividing pipe 1500 is connected to the feed ports of the left sludge cylinder 1200 and the right sludge cylinder 1300 through flanges.

Specifically, the left sludge cylinder 1200 comprises a left sludge cylinder piston 1201, a left sludge cylinder three-way low-damping double-acting one-way valve 1202, a left sludge cylinder four-way low-damping double-acting one-way valve 1203, a left sludge cylinder working material cylinder 1204, a left sludge cylinder external protection cylinder 1205, a left sludge cylinder self-locking nut 1206 and a left sludge cylinder clamp key 1207.

Specifically, the left sludge cylinder three-way low-damping double-acting check valve 1202 of the left sludge cylinder 1200 comprises a left sludge cylinder three-way valve body 1208, a left sludge cylinder three-way valve body discharge port valve core 1209, a left sludge cylinder three-way valve body discharge port valve core seat 1210, a left sludge cylinder three-way valve body discharge port valve core gasket 1211, a left sludge cylinder three-way valve body feed port valve core 1212 and a left sludge cylinder three-way valve body feed port valve core gasket 1213; the upper and lower ports of the left sludge cylinder three-way valve body 1208 are respectively connected with the discharge collecting pipe 1400 and the feeding flow dividing pipe 1500 through flanges, and the middle port is connected with the left sludge cylinder outer protection cylinder 1205 at one end of the rodless cavity of the left sludge cylinder working material cylinder 1204 and serves as a rodless cavity end cover of the left sludge cylinder working material cylinder 1204.

Specifically, the left sludge cylinder four-way type low-damping double-acting check valve 1203 comprises a left sludge cylinder four-way valve body 1288, a left sludge cylinder four-way valve body discharge port valve core 1299, a left sludge cylinder four-way valve body discharge port valve core seat 121010, a left sludge cylinder four-way valve body discharge port valve core gasket 121111, a left sludge cylinder four-way valve body feed port valve core 121212 and a left sludge cylinder four-way valve body feed port valve core gasket 121313; the upper port and the lower port of the left sludge cylinder four-way valve body 1288 are respectively connected with the discharging collecting pipe 1400 and the feeding shunt pipe 1500 through flanges, one port in the middle is connected with the left sludge cylinder outer protective cylinder 1205 at one end of the left sludge cylinder working material cylinder 1204 with a rod cavity through a flange, the left sludge cylinder working material cylinder 1204 with a rod cavity end cover is used, and the other port in the middle is connected and fixed with the double-acting hydraulic oil cylinder 1100 through a flange.

Further, the left sludge cylinder piston 1201 is assembled at the left end of the double-acting hydraulic oil cylinder piston rod 1102, the left sludge cylinder clamping key 1207 is clamped in the left end clamping key groove of the double-acting hydraulic oil cylinder piston rod 1102, the left sludge cylinder self-locking nut 1206 is screwed on the left end external thread of the double-acting hydraulic oil cylinder piston rod 1102, and the left sludge cylinder piston 1201 is in sliding seal fit in the inner hole of the left sludge cylinder working material cylinder 1204; the left sludge cylinder outer protecting cylinder 1205 is sleeved on the excircle of the left sludge cylinder working material cylinder 1204, an annular cavity is arranged between the excircle of the left sludge cylinder working material cylinder 1204 and two ends of an inner hole of the left sludge cylinder outer protecting cylinder 1205, and sealing parts are arranged at two ends of the left sludge cylinder working material cylinder 1204 and the left sludge cylinder outer protecting cylinder 1205 in a clearance fit manner to support and seal the clearance; a sealing piece is arranged on a right-end excircle positioning step of the left sludge cylinder three-way valve body 1208, the right-end excircle positioning step of the left sludge cylinder three-way valve body 1208 is installed in a left-end inner hole of the left sludge cylinder working material cylinder 1204 for static sealing, and the left sludge cylinder three-way valve body 1208 is connected with the left end of the left sludge cylinder outer protection cylinder 1205 through a screw; the outer circle positioning step at the left end of the left sludge cylinder four-way valve body 1288 is provided with a sealing element, the outer circle positioning step at the left end of the left sludge cylinder four-way valve body 1288 is installed in the inner hole at the right end of the left sludge cylinder working material cylinder 1204 and is static sealing, and the left sludge cylinder four-way valve body 1288 is connected with the right end of the left sludge cylinder outer protection cylinder 1205 through a screw; the right end inner hole of the left sludge cylinder four-way valve body 1288 is provided with a sealing device and is in sliding seal with the double-acting hydraulic oil cylinder piston rod 1102 extending into the hole, and the right end of the left sludge cylinder four-way valve body 1288 is fixedly connected with the left end flange of the cylinder barrel 1101 through a screw. The left sludge cylinder four-way valve body discharge port valve core seat 121010 is installed in an upper opening inner hole of the left sludge cylinder four-way valve body 1288, the left sludge cylinder four-way valve body discharge port valve core 1299 is installed in the inner hole of the left sludge cylinder four-way valve body discharge port valve core seat 121010 in a sliding fit manner, and the left sludge cylinder four-way valve body discharge port valve core sealing gasket 121111 is installed on an inner hole step of the left sludge cylinder four-way valve body 1288 below the left sludge cylinder four-way valve body discharge port valve core 1299. The left sludge cylinder four-way valve body feed port valve core 121212 is installed in a sliding fit manner in an inner hole of a valve core seat at the upper part of a feed port of the left sludge cylinder four-way valve body 1288, and the left sludge cylinder four-way valve body feed port valve core sealing gasket 121313 is installed on an inner hole step of the left sludge cylinder four-way valve body 1288 below the left sludge cylinder four-way valve body feed port valve core 121212. The left sludge cylinder three-way valve body discharge port valve seat 1210 is installed in an upper opening inner hole of the left sludge cylinder three-way valve body 1208, a left sludge cylinder three-way valve body discharge port valve core 1209 is installed in a sliding fit manner in the inner hole of the left sludge cylinder three-way valve body discharge port valve seat 1210, a left sludge cylinder three-way valve body discharge port valve core gasket 1211 is installed below the left sludge cylinder three-way valve body discharge port valve core 1209 on an inner hole step of the left sludge cylinder three-way valve body 1208, a left sludge cylinder three-way valve body feed port valve core 1212 is installed in a valve core seat inner hole on the upper portion of the left sludge cylinder three-way valve body 1208 feed port, and a left sludge cylinder three-way valve body feed port valve core gasket 1213 is installed below the left sludge cylinder three-way valve body. It will be appreciated by those skilled in the art that the foregoing screw connection is merely exemplary in this preferred embodiment of the present invention, and that other connection methods, such as welding, are also possible, and the present invention is not limited in this respect.

Preferably, in this preferred embodiment of the present invention, the three-way valve body 1208 of the left sludge cylinder of the left sludge three-way low damping double-acting check valve 1202 of the left sludge cylinder 1200 is an integrated three-way, the middle port is fixedly connected to the outer protecting cylinder 1205 of the left sludge cylinder at one end of the rodless cavity of the working cylinder 1204 of the left sludge cylinder, the outer circle positioning step is provided with a sealing device and an inner hole static seal of the working cylinder 1204 of the left sludge cylinder sleeved on the outer circle thereof, and the rodless cavity of the left sludge cylinder 1200 is sealed to serve as a sealing end cover of the rodless cavity of the sludge pump of the present invention; a straight-through discharge port one-way valve is arranged inside the upper opening of the left sludge cylinder three-way valve body 1208, and the upper opening is connected with the discharge collecting pipe 1400; the lower opening of the left sludge cylinder three-way valve body 1208 is internally provided with a straight-through type feed inlet one-way valve, and the lower opening is connected with the feed dividing pipe 1500.

Preferably, in this preferred embodiment of the present invention, the left sludge cylinder four-way valve body 1288 of the left sludge four-way low damping double-acting check valve 1203 is an integrated four-way, a straight discharge port check valve is arranged inside an upper opening of the left sludge cylinder four-way valve body 1288, and the upper opening is connected with the discharge collecting pipe 1400; a straight-through type feed inlet one-way valve is arranged inside the lower opening of the left sludge cylinder four-way valve body 1288, and the lower opening is connected with the feed dividing pipe 1500; the middle port of the left sludge cylinder outer protective cylinder 1205 is fixedly connected with one end of the rod cavity of the left sludge cylinder working material cylinder 1204, an outer circle positioning step is provided with a sealing device and an inner hole static seal which is sleeved on the outer circle of the sealing device and is used for sealing the rod cavity of the left sludge cylinder 1200 and is used as a sealing end cover of the rod cavity of the sludge pump; the other inner hole in the middle is provided with a sealing device and a piston rod 1102 of the double-acting hydraulic oil cylinder extending into the inner hole in the middle is in sliding seal to seal the rod cavity of the left sludge cylinder 1200; the piston rod 1102 of the double-acting hydraulic oil cylinder extends into the left sludge cylinder 1200 to be connected with the left sludge cylinder piston 1201, and is fixedly connected with the cylinder 1101 of the double-acting hydraulic oil cylinder 1100 through a flange.

It is worth mentioning that the left sludge cylinder three-way type low damping double-acting one-way valve 1202 is an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and is used as a rodless cavity sealing end cover of the left sludge cylinder working material cylinder 1204. The left sludge cylinder four-way type low-damping double-acting check valve 1203 is of an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and serves as a rod cavity sealing end cover of the left sludge cylinder working charging barrel 1204, and has the functions of sliding sealing with the piston rod 1102 of the double-acting hydraulic oil cylinder extending into the hole of the piston rod and connecting with the middle double-acting hydraulic oil cylinder 1100. The upper discharge port one-way valve is in a straight-through structure and is directly connected with the discharge collecting pipe 1400, the lower feed port one-way valve is in a straight-through structure and is directly connected with the feed dividing pipe 1500, materials directly enter the left sludge cylinder working material barrel 1204 through the straight-through lower feed port one-way valve from the feed dividing pipe 1500, the movement distance is short without other pipelines and elbows in the middle, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is high; the materials directly enter the discharge collecting pipe 1400 from the left sludge cylinder working material cylinder 1204 through a straight-through type upper discharge hole one-way valve, and the middle part does not need to pass through other pipelines and bends, has short movement distance, does not change the flow direction, does not generate turbulent flow resistance, and has small operation efficiency.

Specifically, the right sludge cylinder 1300 comprises a right sludge cylinder piston 1301, a right sludge cylinder four-way type low-damping double-acting one-way valve 1302, a right sludge cylinder three-way type low-damping double-acting one-way valve 1303, a right sludge cylinder working material cylinder 1304, a right sludge cylinder outer protection cylinder 1305, a right sludge cylinder self-locking nut 1306 and a right sludge cylinder clamp key 1307.

Specifically, the right sludge cylinder three-way low-damping double-acting one-way valve 1303 comprises a right sludge cylinder three-way valve body 1388, a right sludge cylinder three-way valve body discharge port valve core 1399, a right sludge cylinder three-way valve body discharge port valve core seat 131010, a right sludge cylinder three-way valve body discharge port valve core gasket 131111, a right sludge cylinder three-way valve body feed port valve core 131212 and a right sludge cylinder three-way valve body feed port valve core gasket 131313; the upper and lower ports of the right sludge cylinder three-way valve body 1388 are respectively connected with the discharging collecting pipe 1400 and the feeding flow dividing pipe 1500 through flanges, and the middle port is connected with the right sludge cylinder outer protection cylinder 1305 at one end of the rodless cavity of the right sludge cylinder working material cylinder 1304 to serve as a rodless cavity end cover of the right sludge cylinder working material cylinder 1304. Specifically, the right sludge cylinder four-way type low-damping double-acting check valve 1302 comprises a right sludge cylinder four-way valve body 1308, a right sludge cylinder four-way valve body discharge port valve core 1309, a right sludge cylinder four-way valve body discharge port valve core seat 1310, a right sludge cylinder four-way valve body discharge port valve core sealing gasket 1311, a right sludge cylinder four-way valve body feed port valve core 1312 and a right sludge cylinder four-way valve body feed port valve core sealing gasket 1313; the upper port and the lower port of the right sludge cylinder four-way valve body 1308 are respectively connected with the discharging collecting pipe 1400 and the feeding shunt pipe 1500 through flanges, one port in the middle is connected with the right sludge cylinder outer protective cylinder 1305 at one end, provided with a rod cavity, of the right sludge cylinder working material cylinder 1304 through a flange, and is used as a rod cavity end cover of the right sludge cylinder working material cylinder 1304, and the other port in the middle is fixedly connected with the double-acting hydraulic oil cylinder 1100 through a flange.

Further, the right sludge cylinder piston 1301 is assembled at the right end of the double-acting hydraulic oil cylinder piston rod 1102, the right sludge cylinder clamping key 1307 is clamped in the right clamping key groove of the double-acting hydraulic oil cylinder piston rod 1102, the right sludge cylinder self-locking nut 1306 is screwed on the right external thread of the double-acting hydraulic oil cylinder piston rod 1102, and the right sludge cylinder piston 1301 is in sliding sealing fit in the inner hole of the right sludge cylinder working material barrel 1304; the right sludge cylinder outer protection cylinder 1305 is sleeved on the outer circle of the right sludge cylinder working material cylinder 1304, an annular cavity is formed between the outer circle of the right sludge cylinder working material cylinder 1304 and two ends of an inner hole of the right sludge cylinder outer protection cylinder 1305, and two ends of the right sludge cylinder working material cylinder 1304 and two ends of the right sludge cylinder outer protection cylinder 1305 are in clearance fit with each other and are provided with sealing parts for supporting and sealing; a sealing element is arranged on a positioning step of the excircle at the left end of the right sludge cylinder three-way valve body 1388, the positioning step of the excircle at the left end of the right sludge cylinder three-way valve body 1388 is installed in an inner hole at the right end of the right sludge cylinder working material cylinder 1304 in a static sealing manner, and is connected with the right end of a right sludge cylinder outer protection cylinder 1305 sleeved outside the right sludge cylinder working material cylinder 1304 through a screw; a positioning step on the outer circle of the right end of the right sludge cylinder four-way valve body 1308 is provided with a sealing element which is arranged in an inner hole at the left end of the right sludge cylinder working material cylinder 1304 in a static sealing manner and is connected with the left end of the right sludge cylinder outer protection cylinder 305 sleeved outside the right sludge cylinder working material cylinder 1304 through a screw; the left end inner hole of the right sludge cylinder four-way valve body 1308 is provided with a sealing device and the double-acting hydraulic oil cylinder piston rod 1102 extending into the hole in a sliding sealing mode, and the left end of the right sludge cylinder four-way valve body 1308 is fixedly connected with the right end flange of the cylinder barrel 1101 through a screw. The right sludge cylinder four-way valve body discharge port valve core seat 1310 is installed in an upper opening inner hole of the right sludge cylinder four-way valve body 1308, the right sludge cylinder four-way valve body discharge port valve core 1309 is installed in an inner hole of the right sludge cylinder four-way valve body discharge port valve core seat 1310 in a sliding fit manner, the right sludge cylinder four-way valve body discharge port valve core gasket 1311 is installed on an inner hole step of the right sludge cylinder four-way valve body 1308 below the right sludge cylinder four-way valve body discharge port valve core 1309, the right sludge cylinder four-way valve body feed port valve core 1312 is installed in a valve core seat inner hole at the upper part of the feed port of the right sludge cylinder four-way valve body 1308 in a sliding fit manner, and the right sludge cylinder four-way valve body feed port valve core gasket 1313 is installed on. Right side mud jar three-way valve body discharge gate valve core case 131010 is installed in right side mud jar three-way valve body 1388's the last mouth hole, right side mud jar three-way valve body discharge gate valve core 1399 sliding fit installs in right side mud jar three-way valve body discharge gate valve core case 131010 hole, right side mud jar three-way valve body discharge gate valve core 131111 is installed right side mud jar three-way valve body discharge gate valve core 1399 below on the step of right side mud jar three-way valve body 1388 hole, right side mud jar three-way valve body feed inlet valve core 131212 sliding fit installs in the valve core case hole on right side mud jar three-way valve body 1388 feed inlet upper portion, right side mud jar three-way valve body feed inlet valve core sealed pad 131313 is installed right side mud jar three-way valve body feed inlet valve core 131212 below on the step. It will be appreciated by those skilled in the art that the foregoing screw connection is merely exemplary in this preferred embodiment of the present invention, and that other connection methods, such as welding, are also possible, and the present invention is not limited in this respect.

Preferably, in this preferred embodiment of the present invention, the right sludge cylinder three-way valve body 1388 of the right sludge cylinder three-way low damping double-acting check valve 1303 of the right sludge cylinder 1300 is an integrated three-way valve, the middle port is fixedly connected to the right sludge cylinder outer protective cylinder 1305 at one end of the rodless cavity of the right sludge cylinder working cylinder 1304, the outer circle positioning step is provided with a sealing device and an inner hole static seal of the right sludge cylinder working cylinder 1304 sleeved on the outer circle thereof, and the rodless cavity of the right sludge cylinder 1300 is sealed to serve as a sealing end cover of the rodless cavity of the sludge pump of the present invention; a straight-through discharge port one-way valve is arranged inside an upper opening of the right sludge cylinder three-way valve body 1388, and the upper opening is connected with the discharge collecting pipe 1400; the lower opening of the right sludge cylinder three-way valve body 1388 is internally provided with a straight-through type feed inlet one-way valve, and the lower opening is connected with the feed shunt pipe 1500.

Preferably, in this preferred embodiment of the present invention, the right sludge cylinder three-way valve body 1388 of the right sludge cylinder four-way type low damping double-acting check valve 1302 is an integrated four-way, a straight-through discharge port check valve is arranged inside an upper port of the right sludge cylinder three-way valve body 1388, and the upper port is connected with the discharge manifold 1400; a straight-through type feed inlet one-way valve is arranged inside the lower opening of the right sludge cylinder three-way valve body 11388, and the lower opening is connected with the feed dividing pipe 1500; the middle port of the right sludge cylinder outer protection cylinder 1305 is fixedly connected with one end, provided with a rod cavity, of the right sludge cylinder working material cylinder 1304, an outer circle positioning step is provided with a sealing device and an inner hole of the right sludge cylinder working material cylinder 1304, which is sleeved on the outer circle of the sealing device, is statically sealed, and the rod cavity of the right sludge cylinder 1300 is sealed and serves as a sealing end cover of the rod cavity of the sludge pump; the other inner hole in the middle is provided with a sealing device and a piston rod 1102 of the double-acting hydraulic oil cylinder extending into the hole in a sliding sealing manner, so that the rod cavity of the right sludge cylinder 1300 is sealed; the piston rod 1102 of the double-acting hydraulic oil cylinder extends into the right sludge cylinder 1300 to be connected with the right sludge cylinder piston 1301, and is fixedly connected with the cylinder 1101 of the double-acting hydraulic oil cylinder 1100 through a flange.

It is worth mentioning that the right sludge cylinder three-way type low-damping double-acting one-way valve 1303 is an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return, and is used as a rodless cavity sealing end cover of the right sludge cylinder working material cylinder 1304. The right sludge cylinder four-way type low-damping double-acting check valve 1302 is an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and serves as a rod cavity sealing end cover of the right sludge cylinder working material cylinder 1304, and has the functions of sliding sealing with the piston rod 1102 of the double-acting hydraulic oil cylinder extending into the hole of the piston rod and connecting with the middle double-acting hydraulic oil cylinder 1100. The upper discharge port one-way valve is in a straight-through structure and is directly connected with the discharge collecting pipe 1400, the lower feed port one-way valve is in a straight-through structure and is directly connected with the feed dividing pipe 1500, materials directly enter the right sludge cylinder working material barrel 1304 through the straight-through lower feed port one-way valve from the feed dividing pipe 1500, the middle part does not need to pass through other pipelines and an elbow, the movement distance is short, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the material is followed right sludge jar work feed cylinder 1304 directly gets into ejection of compact collecting pipe through straight-through type upper discharge gate check valve, and the centre need not to pass through other pipelines and elbow movement distance short and do not change the flow direction and produce the little operating efficiency height of turbulent resistance.

Specifically, the left sludge cylinder three-way low-damping double-acting check valve 1202 and the left sludge cylinder four-way low-damping double-acting check valve 1203 are installed at the left end and the right end of the left sludge cylinder 1200, and the right sludge cylinder four-way low-damping double-acting check valve 1302 and the right sludge cylinder three-way low-damping double-acting check valve 1303 are installed at the left end and the right end of the right sludge cylinder 1300. The piston rod 1102 of the double-acting hydraulic oil cylinder performs reciprocating motion left and right to drive the left sludge cylinder piston 1201 and the right sludge cylinder piston 1301 at two ends to move back and forth, and further, the three-way type low-damping double-acting check valve and the four-way type low-damping double-acting check valve at two ends of the left sludge cylinder 1200, namely the left sludge cylinder three-way type low-damping double-acting check valve 1202 and the left sludge cylinder four-way type low-damping double-acting check valve 1203, and the right sludge cylinder 1300 two-way type low-damping double-acting check valve and the four-way type low-damping double-acting check valve, namely the right sludge cylinder four-way type low-damping double-acting check valve 1302 and the right sludge cylinder three-way type low-damping double-acting check valve 1303, the three-way type low-damping double-acting check valve and the upper discharge port check valve and the lower discharge port check valve of the, the reciprocating motion realizes the pumping of materials.

The right cavity of the double-acting hydraulic oil cylinder 1100 is supplied with oil, the piston rod 1102 of the double-acting hydraulic oil cylinder pushes the piston 1201 of the left sludge cylinder leftwards to move, the left sludge cylinder three-way low-damping double-acting check valve 1202 at the left end of the left sludge cylinder 1200 moves downwards, the left sludge cylinder three-way valve body feed inlet valve core 1212 presses the left sludge cylinder three-way valve body feed inlet valve core sealing gasket 1213 tightly so as to close the feed inlet, the left sludge cylinder three-way low-damping double-acting one-way valve 1202 at the left end of the left sludge cylinder 1200 moves upward to separate from the left sludge cylinder three-way valve body discharge port valve core gasket 1211 by the left sludge cylinder three-way valve body discharge port valve core 1209 so as to open the discharge port, the material in the rodless cavity on the left side of the left sludge cylinder piston 1201 is discharged to the discharge manifold 1400 mounted on the left sludge cylinder 1200 and the right sludge cylinder 1300. Meanwhile, the left sludge cylinder four-way type low damping double-acting check valve 1203 at the right end of the left sludge cylinder 1200 moves downwards to press a left sludge cylinder four-way valve body discharge port valve core 1299 tightly against a left sludge cylinder four-way valve body discharge port valve core sealing gasket 121111 so as to close a discharge port, the left sludge cylinder four-way type low damping double-acting check valve 1203 at the right end of the left sludge cylinder 1200 moves upwards to separate from the left sludge cylinder four-way valve body feed port valve core sealing gasket 121313 so as to open a feed port, and a rod cavity at the right side of the left sludge cylinder piston 1201 is sucked into materials in the feeding flow dividing pipe 1500 arranged on the left sludge cylinder 1200 and the right sludge cylinder 1300 to finish storing the materials.

The right cavity of the double-acting hydraulic oil cylinder 1100 is supplied with oil, the piston rod 1102 of the double-acting hydraulic oil cylinder pulls the piston 1301 of the right sludge cylinder leftwards to move, the right sludge cylinder four-way type low damping double-acting check valve 1302 at the left end of the right sludge cylinder 1300 moves downwards to press the right sludge cylinder four-way valve body feed inlet valve core sealing gasket 1313 to close the feed inlet, the right sludge cylinder four-way type low damping double-acting check valve 1302 at the left end of the right sludge cylinder 1300 has the right sludge cylinder four-way valve body discharge port valve core 1309 moving upwards to be separated from the right sludge cylinder four-way valve body discharge port valve core sealing gasket 1311 so as to open the discharge port, the material in the rod cavity on the left side of the right sludge cylinder piston 1301 is discharged to the discharge collecting pipe 1400 installed on the left sludge cylinder 1200 and the right sludge cylinder 1300. Meanwhile, the right sludge cylinder three-way low-damping double-acting check valve 1303 at the right end of the right sludge cylinder 1300 has the right sludge cylinder three-way low-damping double-acting valve body discharge port valve plug 1399 moving downwards to press against the right sludge cylinder three-way valve body discharge port valve plug gasket 131111 so as to close the discharge port, the right sludge cylinder three-way low-damping double-acting check valve 1303 at the right end of the right sludge cylinder 1300 has the right sludge cylinder three-way valve body feed port valve plug 131212 moving upwards to separate from the right sludge cylinder three-way valve body feed port valve plug gasket 131313 so as to open the feed port, and the rodless cavity on the right side of the right sludge cylinder piston 1301 is sucked into the material in the left sludge cylinder 1200 and the feed split pipe 1500 on.

The left cavity of the double-acting hydraulic oil cylinder 1100 is supplied with oil, the piston rod 1102 of the double-acting hydraulic oil cylinder pulls the piston 1201 of the left sludge cylinder to move rightwards, the left sludge cylinder three-way low-damping double-acting check valve 1202 at the left end of the left sludge cylinder 1200 moves upward to separate from the left sludge cylinder three-way valve body feed inlet valve core sealing gasket 1213 so as to open the feed inlet, the left sludge cylinder three-way low-damping double-acting one-way valve 1202 at the left end of the left sludge cylinder 1200 moves downwards, the left sludge cylinder three-way valve body discharge port valve core 1209 presses the left sludge cylinder three-way valve body discharge port valve core sealing gasket 1211 to close the discharge port, the rodless cavity on the left side of the left sludge cylinder piston 1201 sucks materials in the feeding shunt pipe 1500 arranged on the left sludge cylinder 1200 and the right sludge cylinder 1300 to finish storing. Meanwhile, the left sludge cylinder four-way type low damping double-acting check valve 1203 at the right end of the left sludge cylinder 1200 has the left sludge cylinder four-way valve body discharge port valve core 1299 moving upwards to be separated from the left sludge cylinder four-way valve body discharge port valve core sealing gasket 121111 so as to open the discharge port, the left sludge cylinder four-way type low damping double-acting check valve 1203 at the right end of the left sludge cylinder 1200 has the left sludge cylinder four-way valve body feed port valve core 121212 moving downwards to press the left sludge cylinder four-way valve body feed port valve core sealing gasket 121313 tightly so as to close the feed port, and the material with the rod cavity at the right side of the left sludge cylinder piston 1201 is discharged to the discharge collecting pipe 1400 installed on the left sludge cylinder 1200 and the right sludge.

The left cavity of the double-acting hydraulic oil cylinder 1100 is supplied with oil, the piston rod 1102 of the double-acting hydraulic oil cylinder pushes the piston 1301 of the right sludge cylinder to move rightwards, the right sludge cylinder four-way type low damping double-acting check valve 1302 at the left end of the right sludge cylinder 1300 moves upwards to separate from the right sludge cylinder four-way valve body feed inlet valve core sealing gasket 1313 so as to open the feed inlet, the right sludge cylinder four-way type low damping double-acting check valve 1302 at the left end of the right sludge cylinder 1300 has the right sludge cylinder four-way valve body discharge port valve core 1309 moving downwards to press the right sludge cylinder four-way valve body discharge port valve core sealing gasket 1311 tightly so as to close the discharge port, the rod cavity on the left side of the right sludge cylinder piston 1301 sucks materials in the feeding shunt pipe 1500 arranged on the left sludge cylinder 1200 and the right sludge cylinder 1300 to finish storing. Meanwhile, the right sludge cylinder three-way low-damping double-acting check valve 1303 at the right end of the right sludge cylinder 1300 has the right sludge cylinder three-way valve body discharge port valve plug 1399 moving upward to separate from the right sludge cylinder three-way valve body discharge port valve plug gasket 131111 to open the discharge port, the right sludge cylinder three-way low-damping double-acting check valve 1303 at the right end of the right sludge cylinder 1300 has the right sludge cylinder three-way valve body feed port valve plug 131212 moving downward to press the right sludge cylinder three-way valve body feed port valve plug gasket 131313 tightly to close the feed port, and the material in the rodless cavity at the right side of the right sludge cylinder piston 1301 is discharged to the discharge collecting pipe 1400 installed on the left sludge cylinder 1200 and the right sludge cylinder 1300.

Further, the left sludge cylinder piston 1201 is mounted at the left end of the double acting hydraulic ram piston rod 1102, and the right sludge cylinder piston 1301 is mounted at the right end of the double acting hydraulic ram piston rod 1102. Preferably, the left sludge cylinder piston 1201 and the right sludge cylinder piston 1301 are axially and radially fixed to the double-acting hydraulic cylinder piston rod 1102 of the double-acting hydraulic cylinder 1100 through the left sludge cylinder clamp key 1207, the left sludge cylinder self-locking nut 1206 is axially locked and sealed, the right sludge cylinder piston 1301 is axially and radially fixed to the double-acting hydraulic cylinder piston rod 1102 of the double-acting hydraulic cylinder 1100 through the right sludge cylinder clamp key 1307, and the right sludge cylinder self-locking nut 1306 is axially locked and sealed. Preferably, in this preferred embodiment of the present invention, the left sludge cylinder piston 1201 is sleeved on the positioning step of the double-acting hydraulic cylinder piston rod 1102 of the double-acting hydraulic cylinder 1100, and is in clearance fit with the positioning step, and a sealing member is arranged in the middle for supporting and sealing, and a certain coaxiality deviation compensation is allowed; the left sludge cylinder clamping key 1207 fixes the left sludge cylinder piston 1201 at the positioning step of the double-acting hydraulic oil cylinder piston rod 1102 in the axial and radial directions; the inner hole of the left sludge cylinder self-locking nut 1206 is designed as a step blind hole, the inner hole step is sleeved on the excircle of the left sludge cylinder clamping key 1207 to fix the left sludge cylinder clamping key 1207, the inner hole is an internal thread and is screwed with the external thread of the double-acting hydraulic oil cylinder piston rod 1102 to further fix the left sludge cylinder piston 1201, and a sealing ring seal is arranged on the annular surface of the left sludge cylinder self-locking nut 1206 and the left sludge cylinder piston 1201 which are jointed, so that materials in a charging barrel cannot permeate into the joint of the left sludge cylinder piston 1201 and the double-acting hydraulic oil cylinder piston rod 1102 to pollute. Preferably, in this preferred embodiment of the present invention, the right sludge cylinder piston 1301 is sleeved on the positioning step of the double-acting hydraulic cylinder piston rod 1102 of the double-acting hydraulic cylinder 1100, and is in clearance fit with the positioning step, and a sealing member is arranged in the middle for supporting and sealing, and a certain coaxiality deviation compensation is allowed; the right sludge cylinder clamping key 1307 fixes the right sludge cylinder piston 1301 at the positioning step of the double-acting hydraulic oil cylinder piston rod 1102 in an axial and radial direction; the inner hole of the right sludge cylinder self-locking nut 1306 is designed as a step blind hole, the right sludge cylinder clamping key 1307 is fixed on the excircle of the right sludge cylinder clamping key 1307 in a sleeved mode through an inner hole step, the right sludge cylinder piston 1301 is further fixed through screwing of an inner thread and an outer thread of the double-acting hydraulic oil cylinder piston rod 1102, and a sealing ring seal is arranged on a ring surface, which is attached to the right sludge cylinder self-locking nut 1306 and the right sludge cylinder piston 1301, so that materials in a charging barrel cannot penetrate into a joint between the right sludge cylinder piston 1301 and the double-acting hydraulic oil cylinder piston rod 1102 to be polluted and rusted.

Further, a left sludge cylinder working material cylinder 1204 is sleeved with a left sludge cylinder outer protection cylinder 1205, two ends of the left sludge cylinder outer protection cylinder 1205 are provided with cooling ports, an annular cavity is arranged between the left sludge cylinder working material cylinder 1204 and the left sludge cylinder outer protection cylinder 1205, and two ends of the left sludge cylinder working material cylinder 1204 and the left sludge cylinder outer protection cylinder 1205 are provided with sealing parts for clearance fit to support and seal. It should be noted that, preferably, in this preferred embodiment of the present invention, the left sludge cylinder working cylinder 1204 and the left sludge cylinder piston 1201 are in clearance fit, and the left sludge cylinder working cylinder 1204 made of different materials can be conveniently replaced according to different wear conditions or different material properties of the left sludge cylinder working cylinder 1204; the sealing element of the left sludge cylinder piston 1201 is accelerated to age and lose efficacy by generating a large amount of heat energy through back-and-forth movement friction during working between the left sludge cylinder working material cylinder 1204 and the left sludge cylinder piston 1201, cooling ports are arranged at two ends of the left sludge cylinder outer protection cylinder 1205 to introduce cooling media, the large amount of heat energy generated through back-and-forth movement friction during working between the left sludge cylinder working material cylinder 1204 and the left sludge cylinder piston 1201 is taken away, and the aging and losing efficacy of the sealing element of the left sludge cylinder piston 1201 are effectively delayed. Meanwhile, the two ends of the left sludge cylinder working material cylinder 1204 and the left sludge cylinder outer protection cylinder 1205 are in clearance fit, a sealing element is arranged to support and seal, so that the left sludge cylinder working material cylinder 1204 is suspended on the left sludge cylinder piston 1201, cylindricity errors and assembly coaxiality errors caused by machining of the left sludge cylinder working material cylinder 1204 can be effectively compensated, eccentric wear of an inner hole of the left sludge cylinder working material cylinder 1204 and the left sludge cylinder piston 1201 cannot be caused, and the service lives of the left sludge cylinder working material cylinder 1204, the left sludge cylinder piston 1201 and the sealing element of the left sludge cylinder piston 1201 are prolonged.

Further, right mud jar work feed cylinder 1304 cover has right mud jar external protection section of thick bamboo 1305, the both ends of right mud jar external protection section of thick bamboo 1305 are provided with the cooling opening, right mud jar work feed cylinder 1304 with there is an annular cavity between the right mud jar external protection section of thick bamboo 1305, right mud jar work feed cylinder 1304 with the both ends of right mud jar external protection section of thick bamboo 1305 are provided with the sealing member for clearance fit and support and seal. It should be mentioned that, preferably, in this preferred embodiment of the present invention, the right sludge cylinder working cylinder 1304 and the right sludge cylinder piston 1301 are in clearance fit, and the right sludge cylinder working cylinder 1304 of different materials can be conveniently replaced according to the wear condition or material property of the right sludge cylinder working cylinder 1304; the right sludge cylinder working material cylinder 1304 and the right sludge cylinder piston 1301 generate a large amount of heat energy through friction in a back and forth motion mode in the working process, the sealing element of the right sludge cylinder piston 1301 is aged and loses efficacy at an accelerated speed, cooling ports are arranged at two ends of an outer protection cylinder 1305 of the right sludge cylinder to introduce cooling media, the large amount of heat energy generated through friction in the back and forth motion mode in the working process between the right sludge cylinder working material cylinder 1304 and the right sludge cylinder piston 1301 is taken away, and aging and losing efficacy of the sealing element of the right sludge cylinder piston 1301 are effectively delayed. Simultaneously right side mud jar work feed cylinder 1304 with right side mud jar outer protection section of thick bamboo 1305 both ends clearance fit sets up the sealing member and supports and seal, makes right side mud jar work feed cylinder 1304 suspend in on the right side mud jar piston 1301, can effectual compensation cylindricity error that right side mud jar work feed cylinder 1304 processing caused and the axiality error of assembly can not cause the hole of right side mud jar work feed cylinder 1304 with the eccentric wear phenomenon of right side mud jar piston 1301 prolongs right side mud jar work feed cylinder 1304 with right side mud jar piston 1301 with the life of the sealing member of right side mud jar piston 1301.

It is worth mentioning that the double-cylinder double-feed hydraulic piston pump further comprises a stroke adjusting reversing device, and the stroke adjusting reversing device is installed between the left sludge cylinder 1200 and the right sludge cylinder 1300. Specifically, the stroke adjustment reversing device comprises a first sealing guide sleeve 1104, a first position sensor 1105, a reversing valve rod 1106, a position detection sensor 1108, a second position sensor 1109 and a second sealing guide sleeve 1110. More specifically, the first sealing guide bushing 1104 and the first position sensor 1105 are installed on the left sludge cylinder four-way low damping double-acting check valve 1203 at the right end of the left sludge cylinder 1200, the second sealing guide bushing 1110 and the second position sensor 1109 are installed on the right sludge cylinder four-way low damping double-acting check valve 1302 at the left end of the right sludge cylinder 1300, the reversing valve stem 1106 is installed in the sealing guide bushing holes of the first sealing guide bushing 1104 and the second sealing guide bushing 1110, and the position detection sensor 1108 is installed on the reversing valve stem 1106.

It is worth mentioning that the effective strokes at the two ends of the double-acting hydraulic oil cylinder 1100 can be adjusted by adjusting the installation positions of the first position sensor 1105 and the second position sensor 1109, so that when the double-acting hydraulic oil cylinder 1100 moves back and forth at a high speed, the left sludge cylinder piston 1201 and the right sludge cylinder piston 1301 cannot contact the sealing end covers at the two ends of the sludge cylinder, and cylinder collision caused by large movement inertia is avoided.

More specifically, in this preferred embodiment of the present invention, the effective stroke of the left end of the double acting hydraulic cylinder 1100 is adjusted by adjusting the mounting position of the first position sensor 1105 mounted on the left sludge cylinder four-way low damping double acting check valve body 1288. The effective stroke of the right end of the double-acting hydraulic oil cylinder 1100 is adjusted by adjusting the installation position of the second position sensor 1109 installed on the right sludge cylinder four-way type low-damping double-acting check valve 1302, so that when the double-acting hydraulic oil cylinder 1100 moves back and forth at a high speed, the piston of the piston rod 1102 of the double-acting hydraulic oil cylinder cannot contact the first guide sleeve 1103 and the second guide sleeve 1107, and cylinder collision caused by large movement inertia is avoided.

And oil is supplied to the right cavity of the double-acting hydraulic oil cylinder 1100, the piston rod 1102 of the double-acting hydraulic oil cylinder pulls the right sludge cylinder piston 1301 leftwards to move, and the right sludge cylinder piston 1301 pushes the reversing valve rod 1106 installed in the holes of the first sealing guide sleeve 1104 and the second sealing guide sleeve 1110 to move leftwards. When the position detection sensor 1108 mounted on the reversing valve stem 1106 is close to the first position sensor 1105 mounted on the left sludge cylinder four-way valve 288, the first position sensor 1105 sends a signal to the hydraulic system to reverse the reversing valve, so as to supply oil to the left cavity of the double-acting hydraulic oil cylinder 1100. The double-acting hydraulic oil cylinder piston rod 1102 pulls the left sludge cylinder piston 1201 rightwards to move, and the left sludge cylinder piston 1201 pushes the reversing valve rod 1106 installed in the holes of the first sealing guide sleeve 1104 and the second sealing guide sleeve 1110 to move rightwards. When the position detection sensor 1108 mounted on the reversing valve rod 1106 is close to the second position sensor 1109 mounted on the right sludge cylinder four-way type low-damping double-acting check valve 1302, the second position sensor 1109 sends a signal to a hydraulic system to reverse the reversing valve, so as to supply oil to the right cavity of the double-acting hydraulic oil cylinder 1100, and the cycle is repeated.

Fig. 2 shows that the four-way low-damping double-acting check valve according to the second preferred embodiment of the invention is installed in a single-cylinder double-feed hydraulic piston pump, and the single-cylinder double-feed hydraulic piston pump has the advantages of high operating efficiency, low power loss, extremely low suction and discharge damping, compact size, convenience in installation, maintenance and repair, energy conservation and environmental protection.

In this preferred embodiment of the invention, the four-way low damping double acting check valve is implemented as a sludge cylinder four-way low damping double acting check valve 3203 of the sludge cylinder 3200 of the single cylinder dual feed hydraulic piston pump. It will be understood by those skilled in the art that in other variations of the second preferred embodiment of the present invention, the four-way low damping double acting check valve may have other modes in the setting position of the single cylinder double feed hydraulic piston pump, and the present invention is not limited in this respect.

Specifically, in this preferred embodiment of the invention, the single cylinder dual feed hydraulic piston pump comprises a dual acting hydraulic cylinder 3100 and a sludge cylinder 3200, the sludge cylinder 3200 being arranged at the end of the dual acting hydraulic cylinder 3100. In this preferred embodiment of the invention, the sludge cylinder 3200 is mounted at the left end of the double acting hydraulic cylinder 3100. It will be appreciated by those skilled in the art that in other embodiments, the sludge cylinder 3200 may be mounted at the right end of the double acting hydraulic cylinder 3100, and the invention is not limited in this respect.

Specifically, the double-acting hydraulic cylinder 3100 includes a cylinder 3101, a cylinder flange, a double-acting hydraulic cylinder piston rod 3102, a buffer plunger, a guide sleeve 3103, a cylinder rear end cover 3111 and a cylinder rear end cover flange 3107. Further, the double-acting hydraulic cylinder piston rod 3102 and the buffering plunger are assembled in the cylinder barrel 3101, the guide sleeve 3103 is installed at the left end of the cylinder barrel 3101, the rear end cover of the first sealing guide sleeve 3104 is installed at the right end of the cylinder barrel 3101, the piston of the double-acting hydraulic cylinder piston rod 3102 is in sliding sealing fit with the inner hole of the cylinder barrel 3101, and the piston rod of the double-acting hydraulic cylinder piston rod 3102 is in sliding sealing fit with the inner hole of the guide sleeve 3103.

Specifically, the single-cylinder double-feed hydraulic piston pump further comprises a discharge collecting pipe 3400 and a feed split-flow pipe 3500, wherein the discharge collecting pipe 3400 and the feed split-flow pipe 3500 are installed on the sludge cylinder 3200. Further, ejection of compact collecting pipe 3400 pass through the flange with the discharge gate of mud jar 3200 is connected, feeding shunt tubes 3500 pass through the flange with the feed inlet of mud jar 3200 is connected.

Specifically, the sludge cylinder 3200 comprises a sludge cylinder piston 3201, a sludge cylinder three-way low-damping double-acting one-way valve 3202, a sludge cylinder four-way low-damping double-acting one-way valve 3203, a sludge cylinder working material barrel 3204, a sludge cylinder outer protection barrel 3205, a sludge cylinder self-locking nut 3206 and a sludge cylinder clamping key 3207.

The sludge cylinder three-way low-damping double-acting check valve 3202 and the sludge cylinder four-way low-damping double-acting check valve 3203 are arranged at the end of the sludge cylinder 3200. Preferably, in this preferred embodiment of the present invention, said sludge cylinder three-way low damping double acting check valve 3202 is arranged at the left end of said sludge cylinder 3200 and said sludge cylinder four-way low damping double acting check valve 3203 is arranged at the right end of said sludge cylinder 3200. The piston rod 3102 of the double-acting hydraulic oil cylinder returns back and forth left and right to push the piston 3201 of the sludge cylinder at the left end to move back and forth, the upper discharge port one-way valve and the lower discharge port one-way valve of the three-way low-damping double-acting one-way valve 3202 and the four-way low-damping double-acting one-way valve 3203 of the sludge cylinder are opened and closed alternately to finish feeding and discharging, and the reciprocating motion is carried out to achieve the purpose of pumping materials. It will be understood by those skilled in the art that the three-way low damping double acting check valve 3202 and the four-way low damping double acting check valve 3203 are provided in a position that is only exemplary, and the invention is not limited thereto.

Further, the sludge cylinder piston 3201 is mounted at the left end of the double-acting hydraulic cylinder piston rod 3102, the sludge cylinder piston 3201 and the double-acting hydraulic cylinder piston rod 3102 are axially and radially fixed through a clamping key, and a self-sealing nut is axially locked and sealed. The sludge cylinder piston 3201 is a sliding seal fit in an inner bore of the sludge cylinder work barrel 3204. Preferably, in this preferred embodiment of the present invention, the sludge cylinder locking key 3207 is locked in the left end locking key groove of the double acting hydraulic cylinder piston rod 3102, and the sludge cylinder self-locking nut 3206 is screwed on the left end external thread of the double acting hydraulic cylinder piston rod 3102.

Preferably, in this preferred embodiment of the present invention, the sludge cylinder piston 3201 is sleeved on the positioning steps of the double acting hydraulic cylinder piston rod 3102 of the double acting hydraulic cylinder 3100, and is in clearance fit, and a sealing member is arranged in the middle for supporting and sealing, and a certain coaxiality deviation compensation is allowed. The sludge cylinder clamp key 3207 fixes the sludge cylinder piston 3201 at the positioning step of the double-acting hydraulic oil cylinder piston rod 3102 in the axial and radial directions. The sludge cylinder self-locking nut 3206 is characterized in that an inner hole is designed as a step blind hole, the inner hole step is sleeved on the outer circle of the sludge cylinder clamping key 3207 to fix the sludge cylinder clamping key 3207, the inner hole is an inner thread and is screwed with an outer thread of the double-acting hydraulic oil cylinder piston rod 3102 to further fix the sludge cylinder piston 3201, and a sealing ring seal is arranged on the circular ring surface of the joint of the sludge cylinder self-locking nut 3206 and the sludge cylinder piston 3201, so that materials in a charging barrel cannot permeate into the joint of the sludge cylinder piston 3201 and the double-acting hydraulic oil cylinder piston rod 3102 to pollute the joint.

Specifically, the sludge cylinder three-way low-damping double-acting check valve 3202 of the sludge cylinder 3200 comprises a sludge cylinder three-way valve body 3208, a sludge cylinder three-way valve body discharge port valve core 3209, a sludge cylinder three-way valve body discharge port valve core seat 3210, a sludge cylinder three-way valve body discharge port valve core gasket 3211, a sludge cylinder three-way valve body feed port valve core 3212 and a sludge cylinder three-way valve body feed port valve core gasket 3213.

Further, an upper port and a lower port of the three-way valve body 3208 of the sludge cylinder are respectively connected with the discharge collecting pipe 3400 and the feeding flow dividing pipe 3500 through flanges, and a middle port is connected with the outer protective barrel 3205 of the sludge cylinder at one end of a rodless cavity of the working material barrel 3204 of the sludge cylinder through screws and serves as a rodless cavity end cover of the working material barrel 3204 of the sludge cylinder.

Preferably, in this preferred embodiment of the present invention, the three-way valve body 3208 of the sludge cylinder of the left sludge cylinder three-way low damping double-acting check valve 3202 of the sludge cylinder 3200 is an integrated three-way, the middle port is fixedly connected with the outer protection barrel 3205 of the sludge cylinder at one end of the rodless cavity of the working barrel 3204 of the sludge cylinder, the outer circle positioning step is provided with a sealing device and an inner hole of the working barrel 3204 of the sludge cylinder which is sleeved on the outer circle of the sealing device for static sealing the rodless cavity of the sludge cylinder 3200, which is used as the sealing end cover of the rodless cavity of the sludge pump of the present invention. The inside of the upper opening of the sludge cylinder three-way valve body 3208 is a straight-through type discharge port one-way valve, the upper opening is connected with the discharge collecting pipe 3400, the inside of the lower opening of the sludge cylinder three-way valve body 3208 is a straight-through type feed inlet one-way valve, and the lower opening is connected with the feed dividing pipe 3500.

Specifically, the sludge cylinder four-way low-damping double-acting check valve 3203 comprises a sludge cylinder four-way valve body 3288, a sludge cylinder four-way valve body discharge port valve core 3299, a sludge cylinder four-way valve body discharge port valve core seat 321010, a sludge cylinder four-way valve body discharge port valve core sealing gasket 321111, a sludge cylinder four-way valve body feed port valve core 321212 and a sludge cylinder four-way valve body feed port valve core sealing gasket 321313.

Furthermore, the upper and lower ports of the four-way valve body 3288 of the sludge cylinder are respectively connected with the discharge collecting pipe 3400 and the feeding flow dividing pipe 3500 through flanges, the middle port is connected with the outer protection barrel 3205 of the sludge cylinder at one end of the rod cavity of the working material barrel 3204 of the sludge cylinder through a flange and is used as the end cover of the rod cavity of the working material barrel 3204 of the sludge cylinder, and the other middle port is connected and fixed with the double-acting hydraulic oil cylinder 3100 through a flange.

Preferably, in the preferred embodiment of the present invention, the sludge cylinder four-way valve body 3288 of the sludge four-way low damping double-acting check valve 3203 is an integrated four-way. A straight-through discharge port one-way valve is arranged in the upper opening of the sludge cylinder four-way valve body 3288, and the upper opening is connected with the discharge collecting pipe 3400; a straight-through type feed inlet one-way valve is arranged inside the lower opening of the sludge cylinder four-way valve body 3288, and the lower opening is connected with the feed dividing pipe 3500; the middle opening is fixedly connected with the sludge cylinder outer protection barrel 3205 at one end of the sludge cylinder working material barrel 3204 with the rod cavity, the outer circle positioning step is provided with a sealing device and an inner hole of the sludge cylinder working material barrel 3204 sleeved on the outer circle of the sealing device for static sealing, and the rod cavity of the sludge cylinder 3200 is sealed to be used as a sealing end cover of the rod cavity of the sludge pump; the other inner hole in the middle is provided with a sealing device and a piston rod 3102 of the double-acting hydraulic oil cylinder extending into the hole to be sealed in a sliding way, so that a rod cavity of the sludge cylinder 3200 is sealed; the piston rod 3102 of the double-acting hydraulic oil cylinder extends into the sludge cylinder 3200 and is connected with the sludge cylinder piston 3201. The sludge cylinder three-way valve body 3208 of the sludge four-way low-damping double-acting check valve 3203 is fixedly connected with the cylinder barrel flange of the double-acting hydraulic oil cylinder 3100 through screws.

The right-hand member excircle location step of mud jar tee bend valve body 3208 is provided with the sealing member, the right-hand member excircle location step of mud jar tee bend valve body 3208 is installed static seal in the left end hole of mud jar work feed cylinder 3204, mud jar tee bend valve body 3208 through the screw with the left end of mud jar external protection section of thick bamboo 3205 is connected. The sludge cylinder three-way valve body discharge port valve core seat 3210 is installed in an upper opening inner hole of the sludge cylinder three-way valve body 3208, the sludge cylinder three-way valve body discharge port valve core 3209 is installed in an inner hole of the sludge cylinder three-way valve body discharge port valve core seat 3210 in a sliding fit manner, the sludge cylinder three-way valve body discharge port valve core gasket 3211 is installed on an inner hole step of the sludge cylinder three-way valve body 3208 below the sludge cylinder three-way valve body discharge port valve core 3209, the sludge cylinder three-way valve body feed port valve core 3212 is installed in a valve core seat inner hole at the upper part of a feed port of the sludge cylinder three-way valve body 3208 in a sliding fit manner, and the sludge cylinder three-way valve body feed port valve core gasket 3213 is installed on an inner hole step of the sludge cylinder three.

In the preferred embodiment of the present invention, the outer circle positioning step at the left end of the sludge cylinder four-way valve body 3288 is provided with a sealing member, the outer circle positioning step at the left end of the sludge cylinder four-way valve body 3288 is installed in the inner hole at the right end of the sludge cylinder working barrel 3204, and the sludge cylinder four-way valve body 3288 is connected with the right end of the sludge cylinder outer protective barrel 3205 through a screw for static sealing. The right end inner hole of the sludge cylinder four-way valve body 3288 is provided with a sealing device and is in sliding seal with a double-acting hydraulic oil cylinder piston rod 3102 extending into the hole, and the right end of the sludge cylinder four-way valve body 3288 is fixedly connected with the left end flange of the cylinder barrel 3101 through a screw. The sludge cylinder four-way valve body discharge port valve core seat 321010 is installed in an upper opening inner hole of the sludge cylinder four-way valve body 3288, the sludge cylinder four-way valve body discharge port valve core 3299 is installed in the inner hole of the sludge cylinder four-way valve body discharge port valve core seat 321010 in a sliding fit mode, and the sludge cylinder four-way valve body discharge port valve core sealing gasket 321111 is installed on an inner hole step of the sludge cylinder four-way valve body 3288 below the sludge cylinder four-way valve body discharge port valve core 3299. The sludge cylinder four-way valve body feed port valve core 321212 is installed in the inner hole of the valve core seat at the upper part of the feed port of the sludge cylinder four-way valve body 3288 in a sliding fit manner. The sealing gasket 321313 of the sludge cylinder four-way valve body feed port valve core is installed on the step of the inner hole of the sludge cylinder four-way valve body 3288 below the sludge cylinder four-way valve body feed port valve core 321212.

It will be appreciated by those skilled in the art that the foregoing screw connection is merely exemplary in this preferred embodiment of the present invention, and that other connection methods, such as welding, are also possible, and the present invention is not limited in this respect.

It is worth mentioning that the sludge cylinder three-way type low-damping double-acting one-way valve 3202 is an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return and is used as a rodless cavity sealing end cover of the sludge cylinder working material cylinder 3204. The sludge cylinder four-way type low-damping double-acting one-way valve 3203 is an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return, and is used as a rod cavity sealing end cover of the sludge cylinder working material barrel 3204, and has the functions of sliding sealing with the piston rod 3102 of the double-acting hydraulic oil cylinder extending into the hole of the piston rod and connecting with the middle double-acting hydraulic oil cylinder 3100. The upper discharge port one-way valve is in a straight-through structure and is directly connected with the discharge collecting pipe 3400, the lower feed inlet one-way valve is in a straight-through structure and is directly connected with the feed dividing pipe 3500, materials directly enter the sludge cylinder working material barrel 3204 from the feed dividing pipe 3500 through the straight-through lower feed inlet one-way valve, the movement distance is short without other pipelines and elbows in the middle, the flowing direction is not changed, the turbulent flow resistance is not generated, and the operation efficiency is low; the materials directly enter the discharge collecting pipe 3400 from the sludge cylinder working material barrel 3204 through a straight-through type upper discharge port one-way valve, and the middle part does not need to pass through other pipelines and bends, has short movement distance, does not change the flow direction, does not generate turbulent flow resistance, and has small operation efficiency.

In this preferred embodiment of the present invention, oil is supplied to the right cavity of the double-acting hydraulic cylinder 3100, the piston rod 3102 of the double-acting hydraulic cylinder pushes the piston 3201 of the sludge cylinder to move leftward, the valve plug 3212 of the sludge cylinder three-way low damping double-acting check valve 3202 of the left end of the sludge cylinder 3200 moves downward to press the valve plug gasket 3213 of the sludge cylinder three-way valve body inlet to close the inlet, the valve plug 3209 of the sludge cylinder three-way low damping double-acting check valve 3202 of the left end of the sludge cylinder 3200 moves upward to separate from the valve plug gasket 3211 of the sludge cylinder three-way valve body outlet to open the outlet, and the material in the rodless cavity of the left side of the sludge cylinder piston 3201 is discharged to the discharge confluence pipe 3400 installed on the sludge cylinder 3200. Meanwhile, a sludge cylinder four-way type low-damping double-acting check valve 3203 at the right end of the sludge cylinder 3200 moves downwards to press a sludge cylinder four-way valve body discharge port valve core 3299 to close a discharge port, a sludge cylinder four-way type low-damping double-acting check valve 3203 at the right end of the sludge cylinder 3200 moves upwards to separate from a sludge cylinder four-way valve body feed port valve core 321212 of the sludge cylinder four-way type low-damping double-acting check valve 3203 to open a feed port, and a rod cavity at the right side of a sludge cylinder piston 3201 sucks materials in a feed flow dividing pipe 3500 arranged on the sludge cylinder 3200 to finish storage.

The left cavity of the double-acting hydraulic oil cylinder 3100 is supplied with oil, the piston rod 3102 of the double-acting hydraulic oil cylinder pulls the piston 3201 of the sludge cylinder rightward to move rightward, the sludge cylinder three-way low-damping double-acting check valve 3202 at the left end of the sludge cylinder 3200 moves upward to separate from the sealing gasket 3213 of the sludge cylinder three-way valve body feed inlet valve core, so that a feed inlet is opened, the sludge cylinder three-way valve body discharge outlet valve core 3209 of the sludge cylinder three-way low-damping double-acting check valve 3202 at the left end of the sludge cylinder 3200 moves downward to press the sealing gasket 3211 of the sludge cylinder three-way valve body discharge outlet valve core, so that a discharge outlet is closed, and the rodless cavity at the left side of the sludge cylinder piston 3201 sucks the material in the feed shunt pipe 3500 mounted on the sludge cylinder 3200 to. Meanwhile, the sludge cylinder four-way type low damping double-acting check valve 3203 at the right end of the sludge cylinder 3200 moves upwards to separate from the sludge cylinder four-way valve body discharge port valve core sealing gasket 321111 so as to open the discharge port, the sludge cylinder four-way type low damping double-acting check valve 3203 at the right end of the sludge cylinder 3200 moves downwards to press the sludge cylinder four-way valve body feed port valve core 321212 to tightly close the sludge cylinder four-way valve body feed port valve core sealing gasket 321313 so as to close the feed port, and the material with a rod cavity at the right side of the sludge cylinder piston 3201 is discharged to the collecting pipe 3400 installed on the sludge cylinder 3200.

Further, the sludge cylinder working material cylinder 3204 is sleeved with the sludge cylinder outer protective cylinder 3205. Preferably, in this preferred embodiment of the present invention, the sludge cylinder outer protecting cylinder 3205 is fitted over an outer circumference of the sludge cylinder working cylinder 3204. The two ends of the sludge cylinder outer protection barrel 3205 are provided with cooling ports, an annular cavity is arranged between the sludge cylinder working material barrel 3204 and the sludge cylinder outer protection barrel 3205, and the two ends of the sludge cylinder working material barrel 3204 and the sludge cylinder outer protection barrel 3205 are provided with sealing pieces for clearance fit to support and seal. Preferably, in this preferred embodiment of the present invention, the annular cavity is formed between the outer circumference of the sludge cylinder work cylinder 3204 and both ends of the inner hole of the sludge cylinder outer protective cylinder 3205.

It should be noted that, in the preferred embodiment of the present invention, the sludge cylinder work barrel 3204 and the sludge cylinder piston 3201 are in clearance fit, so that the sludge cylinder work barrel 3204 of different materials can be conveniently replaced according to the wear condition of the sludge cylinder work barrel 3204 or the material property. The sealing element is characterized in that the reciprocating friction between the sludge cylinder working material barrel 3204 and the sludge cylinder piston 3201 generates a large amount of heat energy during working, cooling media are introduced into cooling ports arranged at two ends of the sludge cylinder outer protection barrel 3205 to enter the annular cavity, the large amount of heat energy generated by the reciprocating friction between the sludge cylinder working material barrel 3204 and the sludge cylinder piston 3201 during working is taken away, and the aging failure of the sealing element of the sludge cylinder piston 3201 is effectively delayed. Meanwhile, the two ends of the sludge cylinder working material barrel 3204 and the sludge cylinder outer protective barrel 3205 are in clearance fit, and a sealing member is arranged to support and seal, so that the sludge cylinder working material barrel 3204 is suspended on the sludge cylinder piston 3201. The mud cylinder working material barrel 3204 is suspended on the mud cylinder piston 3201, and can effectively compensate cylindricity errors and assembly coaxiality errors caused by processing of the mud cylinder working material barrel 3204, and the eccentric wear phenomenon of the inner hole of the mud cylinder working material barrel 3204 and the mud cylinder piston 3201 can not be caused, so that the service life of the mud cylinder working material barrel 3204, the mud cylinder piston 3201 and a sealing element of the mud cylinder piston 3201 is prolonged.

It is worth mentioning that the single-cylinder dual-feed hydraulic piston pump further comprises a stroke-adjusting reversing device, and the stroke-adjusting reversing device is installed between the sludge cylinder 3200 and the cylinder rear end cover flange 3107 of the dual-acting hydraulic cylinder 3100. Specifically, the stroke adjustment and reversing device includes a first sealing guide sleeve 3104, a first position sensor 3105, a reversing valve rod 3106, a position detection sensor 3108, a second position sensor 3109, and a second sealing guide sleeve 3110. More specifically, the first sealing guide sleeve 3104 and the first position sensor 3105 are installed on the sludge cylinder four-way low damping double-acting check valve 3203 at the right end of the sludge cylinder 3200, the second sealing guide sleeve 3110 and the second position sensor 3109 are installed on the cylinder rear end cover 3111 of the double-acting hydraulic cylinder 3100, the reversing valve stem 3106 is installed in the sealing guide sleeve holes of the first sealing guide sleeve 3104 and the second sealing guide sleeve 3110, the position detection sensor 3108 is installed on the reversing valve stem 3106, and the reversing valve stem 3106 is also installed on a sludge cylinder piston clamping groove.

It is worth mentioning that the effective strokes at the two ends of the double-acting hydraulic cylinder 3100 can be adjusted by adjusting the mounting positions of the first position sensor 3105 and the second position sensor 3109, so that when the double-acting hydraulic cylinder 3100 moves back and forth at a high speed, the piston 3201 of the sludge cylinder cannot contact the sealing end covers at the two ends of the sludge cylinder, and the cylinder collision caused by large movement inertia is avoided.

More specifically, in this preferred embodiment of the present invention, the effective stroke of the left end of the double acting hydraulic cylinder 3100 is adjusted by adjusting the mounting position of the first position sensor 3105 mounted on the sludge cylinder quad-low damping double acting check valve body 3288. The effective stroke of the right end of the double-acting hydraulic oil cylinder 3100 is adjusted by adjusting the mounting position of the second position sensor 3109 mounted on the oil cylinder rear end cover flange 3107, so that when the double-acting hydraulic oil cylinder 3100 moves back and forth at a high speed, the piston of the piston rod 3102 of the double-acting hydraulic oil cylinder cannot contact the guide sleeve 3103 and the oil cylinder rear end cover 3111, and cylinder collision caused by large movement inertia is avoided.

In this preferred embodiment of the present invention, the right chamber of the double acting hydraulic cylinder 3100 is supplied with oil, the double acting hydraulic cylinder piston rod 3102 pushes the sludge cylinder piston 3201 to the left to move to the left, pulling the diverter valve stem 3106 mounted in the holes of the first seal guide 3104 and the second seal guide 3110 to move to the left, when the position sensing sensor 3108 mounted on the diverter valve stem 3106 approaches the first position sensor 3105 mounted on the sludge cylinder four-way low damping double acting check valve body 3288, the first position sensor 3105 sends a signal to the hydraulic system to divert the diverter valve, supplying oil to the left chamber of the double acting hydraulic cylinder 3100; the piston rod 3102 of the double-acting hydraulic oil cylinder pulls the left sludge cylinder piston 3201 rightwards to move rightwards, the left sludge cylinder piston 3201 pushes the reversing valve rod 3106 arranged in the holes of the first sealing guide sleeve 3104 and the second sealing guide sleeve 3110 to move rightwards, when the position detection inductor 3108 arranged on the reversing valve rod 3106 is close to the second position inductor 3109 arranged on the oil cylinder rear end cover flange 3107, the second position inductor 3109 sends a signal to a hydraulic system to change the direction of the reversing valve, and oil is supplied to the right cavity of the double-acting hydraulic oil cylinder 3100, and the cycle is repeated.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. The four-way low-damping double-acting one-way valve is characterized in that the four-way low-damping double-acting one-way valve is of an integrated structure, and is provided with an upper discharging port one-way valve with an upper discharging one-way check function and a lower feeding port one-way valve with a lower feeding one-way check function, and materials directly enter through the lower feeding port one-way valve and are directly discharged through the upper discharging port one-way valve.

2. The four-way low damping double-acting check valve of claim 1, wherein the four-way low damping double-acting check valve comprises a four-way valve body, the four-way valve body is an integrated four-way valve body, a straight-through upper discharge port check valve is arranged inside an upper opening of the four-way valve body, a straight-through lower feed port check valve is arranged inside a lower opening of the four-way valve body, and the straight-through upper discharge port check valve and the straight-through lower feed port check valve of the four-way low damping double-acting check valve are opened and closed alternately.

3. The four-way low damping double-acting one-way valve of claim 2, wherein the upper and lower ports of the four-way valve body are respectively connected with a discharge collecting pipe and a feed dividing pipe.

4. The four-way low damping double-acting one-way valve of claim 2, wherein the middle port of the four-way valve body is connected with a working material cylinder, and the other middle port is fixedly connected with the double-acting hydraulic oil cylinder.

5. The four-way low damping double-acting one-way valve according to claim 2, wherein a middle port of the four-way valve body of the four-way low damping double-acting one-way valve is connected with a rod cavity of a sludge cylinder working charging barrel to serve as an end cover of the rod cavity of the sludge cylinder working charging barrel.

6. The four-way low damping double-acting one-way valve of claim 5, wherein the outer circle positioning step at one end of the four-way valve body is provided with a sealing element and is installed in an inner hole at the end part of the sludge cylinder working material cylinder for static sealing.

7. The four-way low damping double-acting one-way valve according to claim 5, wherein the sludge cylinder working material cylinder is sleeved with a sludge cylinder outer protection cylinder, and the middle port of the four-way valve body is connected with the sludge cylinder outer protection cylinder at one end of the rod cavity of the sludge cylinder working material cylinder through a flange to serve as a rod cavity end cover of the sludge cylinder working material cylinder.

8. The four-way low damping double-acting check valve of claim 7, wherein the inner bore of one end of the four-way valve body is provided with a sealing device and is in sliding seal with a piston rod of a double-acting hydraulic oil cylinder extending into the bore of the four-way valve body.

9. The four-way low damping double-acting check valve of any one of claims 1 to 8, wherein the four-way low damping double-acting check valve further comprises a four-way valve body discharge port valve core, a four-way valve body discharge port valve core seat, a four-way valve body discharge port valve core sealing gasket, a four-way valve body feed port valve core and a four-way valve body feed port valve core sealing gasket, wherein the four-way valve body discharge port valve core seat is installed in an upper port inner hole of the four-way valve body, the four-way valve body discharge port valve core is installed in an inner hole of the four-way valve body discharge port valve core seat in a sliding fit manner, the four-way valve body discharge port valve core sealing gasket is installed on an inner hole step of the four-way valve body below the four-way valve body discharge port valve core, the four-way valve The inner hole step of the four-way valve body.

10. The four-way low damping double-acting check valve of claim 9, wherein the four-way valve body discharge port spool moves downward to compress the four-way valve body discharge port spool seal to close the discharge port, and the four-way valve body feed port spool moves upward to disengage the four-way valve body feed port spool seal to open the feed port.

11. The four-way low damping double acting check valve of any one of claims 1 to 8, wherein the four-way low damping double acting check valve is disposed at an end of a sludge cylinder of a hydraulic sludge pump.

12. The four-way low-damping double-acting one-way valve of claim 11, wherein the hydraulic sludge pump is a double-cylinder double-feed hydraulic piston pump or a single-cylinder double-feed hydraulic piston pump.

13. The four-way low-damping double-acting one-way valve according to claim 11, wherein the hydraulic sludge pump comprises a double-acting hydraulic cylinder and two sludge cylinders, wherein the two sludge cylinders are respectively installed at two ends of the double-acting hydraulic cylinder, and wherein the end of at least one sludge cylinder is provided with the four-way low-damping double-acting one-way valve.

14. The four-way low damping double acting check valve of claim 11, wherein the hydraulic sludge pump comprises a double acting hydraulic ram and a sludge cylinder, wherein the sludge cylinder is connected to the double acting hydraulic ram.