CN113550958B

CN113550958B - Hydraulic integrated lock for electro-hydraulic push rod, processing method, device and maintenance method

Info

Publication number: CN113550958B
Application number: CN202110836093.1A
Authority: CN
Inventors: 吴荣飞
Original assignee: Shanghai Haomin Hydraulic Complete Equipment Factory
Current assignee: Shanghai Haomin Hydraulic Complete Equipment Factory
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2024-06-14
Anticipated expiration: 2041-07-23
Also published as: CN113550958A

Abstract

The invention discloses a hydraulic integrated lock for an electro-hydraulic push rod, a processing method, a device and an overhaul method, wherein the hydraulic integrated lock comprises a driving device, an oil tank, an oil pump connected with the driving device, an overhaul hole is formed in the oil tank, an overhaul hole cover is arranged on the overhaul hole, and the hydraulic integrated lock for the electro-hydraulic push rod is easy to detach a one-way valve from the overhaul hole; the electrohydraulic push rod is connected with the oil pump through a hydraulic integrated lock and is arranged below the manhole. The invention can effectively realize heat dissipation, avoid the rise of the oil temperature of hydraulic oil, avoid internal leakage caused by the rise of the oil temperature, and improve the service life of the hydraulic part and the operation precision of the electro-hydraulic push rod; meanwhile, when the check valve is overhauled and cleaned, the check valve can be conveniently taken down only by taking down the manhole cover, so that the complexity of overhauling the check valve is greatly reduced, and the overhauling and cleaning time of the check valve is greatly shortened.

Description

Hydraulic integrated lock for electro-hydraulic push rod, processing method, device and maintenance method

Technical field:

the invention belongs to the technical field of hydraulic control, and particularly relates to a hydraulic integrated lock for an electro-hydraulic push rod, a processing method, a device and an overhaul method.

The background technology is as follows:

The electrohydraulic push rod is a hydraulic driving manipulator integrating machine, electricity and liquid and is suitable for the occasion needing to reciprocate, push and pull straight line motion or needing to ascend or descend. The electro-hydraulic push rod generally comprises an oil cylinder, a valve group and a power source, wherein the valve group is a core component of the electro-hydraulic push rod. The valve group that present electrohydraulic push rod used generally adopts the form of pressure oil inner loop to work, and the hydraulic oil of the oil outlet of this kind of inner loop mode's hydraulic push rod directly gets into the inlet port through this device, in the course of the work, hydraulic oil pressurized, high-speed operation can appear the temperature rising phenomenon in the pipeline, especially when frequent forward, reverse motion, can cause the system temperature to suddenly increase, leads to spare part inefficacy, reduction in service life.

In the Chinese patent of 201320016060.3, a hydraulic integrated lock for an electrohydraulic push rod is provided, which comprises a main valve body, wherein a main valve hole A and a main valve hole B are arranged at the upper part of the main valve body, a horizontal main hole is arranged on the main valve body, the lower orifices of the main valve hole A and the main valve hole B are respectively communicated with the main hole, a reversing hole A and a reversing hole B which are vertical to the main hole are also arranged on the main valve body, the reversing hole A and the reversing hole B are respectively communicated with the main hole through a horizontal oil port, a main valve core and a pair of check valves are respectively arranged at two sides of the main hole, hydraulic oil enters the main hole from the reversing hole during working, the main valve core pushes the check valves under the pressure of the hydraulic oil, and the check valves are opened to finish the external circulation process from the oil tank to the oil tank, thereby effectively solving the problem of the rise of the hydraulic oil temperature caused by the internal circulation mode. However, in actual use, the check valve is often blocked and does not lock pressure due to hydraulic oil impurities and the like. At this time, the check valve is required to be disassembled for maintenance and cleaning, the check valve of the hydraulic integrated lock for the electro-hydraulic push rod with the application number 201320016060.3 is arranged on the two sides of the horizontal main hole, the horizontal main hole is arranged at the radial position of the electro-hydraulic push rod pipeline, the aperture of the electro-hydraulic push rod pipeline is not too large, when the check valve is cleaned and overhauled, all oil in the oil cylinder is firstly discharged, and then the check valve can be taken out after the electro-hydraulic push rod is completely disassembled, so that the maintenance and cleaning are very difficult. In addition, the one-way valves are arranged on the two sides of the horizontal main hole, so that the aperture of the pipeline of the electro-hydraulic push rod cannot be too small, and the electro-hydraulic push rod cannot be used in occasions with space requirements.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

The invention comprises the following steps:

The invention aims to provide a hydraulic integrated lock for an electro-hydraulic push rod, a processing method, a device and an overhaul method, so that the defects in the prior art are overcome.

In order to achieve the above object, the present invention provides a hydraulic integrated lock for an electro-hydraulic push rod, comprising: the main body is provided with a hole A and a hole B, and is also provided with a main hole A and a main hole B, a reversing hole A and a reversing hole B, a throttle valve hole A and a throttle valve hole B;

The throttle valve hole A is communicated with the reversing hole A, and the throttle valve hole B is communicated with the reversing hole B;

The main body is also provided with a pair of main hole connecting holes A and B; the primary hole connecting hole A is used for communicating the hole A with the primary hole A; the primary hole connecting hole B is used for communicating the hole B with the primary hole B;

The main body is also provided with a pair of main hole connecting holes A and B; the main hole connecting hole II A is used for communicating the reversing hole A with the main hole A; the second main hole connecting hole B is used for communicating the reversing hole B with the main hole B;

The reversing control device is respectively arranged on the reversing hole A and the reversing hole B; when the reversing control device is used for oil feeding, the orifice of the communicating part of the reversing hole A and the throttle valve hole A and the orifice of the communicating part of the reversing hole B and the throttle valve hole B are closed, the orifice of the reversing hole A and the orifice of the reversing hole B are opened, and the orifice of the communicating part of the main hole connecting hole II A and the reversing hole A and the orifice of the communicating part of the main hole connecting hole II B and the reversing hole B are opened; when the reversing control device returns oil, opening an orifice at the communication position of the reversing hole A and the throttle valve hole A and an orifice at the communication position of the reversing hole B and the throttle valve hole B; closing the orifice of the reversing hole A and the orifice of the reversing hole B;

The device also comprises a pair of unidirectional control devices respectively arranged on the main hole A and the main hole B; the unidirectional control device can be opened under the action of external force, and can be automatically closed when the external force disappears; when the unidirectional control device is closed, the hole A and the main hole A and the hole B and the main hole B are cut off; when the unidirectional control device is opened, the hole A is communicated with the hole A of the main hole A, the hole B is communicated with the hole B of the main hole B;

an oil inlet A and an oil inlet B are arranged on the accessory body;

the oil inlet A and the reversing hole A are in butt joint to form an oil inlet channel A, and the aperture of the oil inlet A is smaller than that of the reversing hole A; the oil inlet B is in butt joint with the reversing hole B to form an oil inlet channel B, and the aperture of the oil inlet B is smaller than that of the reversing hole B;

A control oil inlet channel A and a control oil inlet channel B are arranged on the combination body of the main body and the accessory body;

the control oil inlet channel A is communicated with the oil inlet channel A and is communicated to the bottom of the main hole B; the oil inlet control channel B is communicated with the oil inlet control channel B and is communicated to the bottom of the main hole A.

Further, the throttle valve hole A and the throttle valve hole B are respectively provided with a throttle device; the throttling device can adjust the flow of hydraulic oil on the throttling valve hole A and the throttling valve hole B.

Further, the throttle device comprises an oil return hole A arranged on the throttle valve hole A, an oil return hole B arranged on the throttle valve hole B, and a pair of throttle valves respectively arranged on the throttle valve hole A and the throttle valve hole B; the throttle valve can adjust the flow of hydraulic oil.

Further, the accessory body is provided with an overflow valve hole A communicated with the oil inlet hole A, an overflow valve hole B communicated with the oil inlet hole B and a pair of overflow valves respectively arranged on the overflow valve hole A and the overflow valve hole B; an overflow valve oil return hole A is formed in the overflow valve hole A; an overflow valve oil return hole B is formed in the overflow valve hole B; the relief valve may regulate hydraulic oil pressure.

Further, the reversing control device comprises a reversing valve and a reversing valve return spring; the reversing valve has a shaft and a piston head; the reversing valve reset spring is sleeved on the rod body of the reversing valve; the piston heads of the reversing valves are downwards arranged in the reversing holes A and B respectively.

Further, the unidirectional control device has a primary flow control function and a secondary flow control function, and the hydraulic oil flow of the secondary flow control function is larger than that of the primary flow control function.

Further, the unidirectional control device comprises a control piston and a unidirectional valve; the control piston comprises a piston-shaped plug body, and a thimble is arranged at one end of the plug body; the control piston is arranged at the bottoms of the main hole A and the main hole B respectively, and the ejector pins on the control piston face the orifices of the main hole A and the main hole B; the check valve is arranged on the main hole A and the main hole B respectively and faces to the thimble on the control piston, and the check valve can be opened under the pushing of the thimble on the control piston.

Further, the one-way valve comprises a one-way valve body with a middle hole, a one-way valve core, a steel ball, a push rod, a spring and an end cover; the one-way valve body is respectively fixed in the main hole A and the main hole B; the end cover is fixed in the middle hole at the outer side of the one-way valve body;

The unidirectional valve core is provided with a stepped hole on the axis; the one-way valve core can be movably arranged in the middle hole of the one-way valve body); the small step hole of the one-way valve core faces the control piston;

The spring is sleeved on the rod body of the ejector rod; the head of the ejector rod contacts the steel ball; the steel ball is matched with the large stepped hole of the one-way valve core and can be movably arranged in the large stepped hole of the one-way valve core;

The end face of the end cover, facing the ejector rod, is provided with a step hole; the small step hole of the end cover is matched with the rod body of the ejector rod; the large step hole of the end cover is matched with the spring.

Further, the ejector pin of the control piston comprises a first-stage ejector pin and a second-stage ejector pin; the diameter of the primary thimble is smaller than the diameter of the small step hole of the unidirectional valve core; the axial length of the primary ejector pin is greater than that of the small step hole of the one-way valve core;

the diameter of the second-stage thimble is larger than that of the small step hole of the one-way valve core and smaller than that of the middle hole of the one-way valve core.

Further, a pressure gauge hole is formed in the main body; the hole bottoms of the pressure gauge holes are respectively communicated with the hole bottoms of the main holes A and the main holes B.

Further, the oil inlet A and the oil inlet B are vertical to the combination surface of the main body and the accessory body; the control hole oil inlet A and the control hole oil inlet B are parallel to the oil inlet A and the oil inlet B; the overflow valve hole A and the overflow valve hole B are vertical to the oil inlet hole A and the oil inlet hole B; and the overflow valve oil return hole A and the overflow valve oil return hole B are perpendicular to the overflow valve hole A and the overflow valve hole B.

Further, the openings of the main holes A and the main holes B are positioned on the side surface of the main body perpendicular to the contact surface of the main body and the accessory body.

Further, the openings of the main holes A and the main holes B are positioned on the side surface of the main body parallel to the contact surface of the main body and the accessory body.

Further, the orifice of the main hole A is positioned on the side surface of the main body parallel to the contact surface of the main body and the accessory body; the orifice of the main hole B is positioned on the side surface of the main body perpendicular to the contact surface of the main body and the accessory body.

Further, the holes A and B are vertical to the joint surface of the main body and the accessory; the main holes A and B are perpendicular to the holes A and B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole B, and the control hole B is communicated with the bottom of the main hole A; the oil inlet A is communicated with the oil inlet A of the control hole, and the oil inlet B is communicated with the oil inlet B of the control hole.

The hole A and the hole B are vertical to the joint surface of the main body and the accessory; the main holes A and B are perpendicular to the holes A and B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole A, and the control hole B is communicated with the bottom of the main hole B; the oil inlet A is communicated with the oil inlet B of the control hole, and the oil inlet B is communicated with the oil inlet A of the control hole

Further, the holes A and B are vertical to the joint surface of the main body and the accessory; the main holes A and B are parallel to the holes A and B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole B, and the control hole B is communicated with the bottom of the main hole A; the oil inlet A is communicated with the oil inlet A of the control hole, and the oil inlet B is communicated with the oil inlet B of the control hole.

Further, the holes A and B are vertical to the joint surface of the main body and the accessory; the main holes A and B are parallel to the holes A and B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole A, and the control hole B is communicated with the bottom of the main hole B; the oil inlet A is communicated with the oil inlet B of the control hole, and the oil inlet B is communicated with the oil inlet A of the control hole.

Further, the holes A and B are vertical to the joint surface of the main body and the accessory; the main hole A is parallel to the hole A, and the main hole B is perpendicular to the hole B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole B, and the control hole B is communicated with the bottom of the main hole A; the oil inlet A is communicated with the oil inlet A of the control hole, and the oil inlet B is communicated with the oil inlet B of the control hole.

Further, the holes A and B are vertical to the joint surface of the main body and the accessory; the main hole A is parallel to the hole A, and the main hole B is perpendicular to the hole B; the reversing holes A and B are parallel to the holes A and B; the throttle valve hole A and the throttle valve hole B are perpendicular to the hole A and the hole B; the main hole connecting hole A and the main hole connecting hole B are parallel to the joint surface of the main body and the accessory body; the main hole connecting hole II A and the main hole connecting hole II B are parallel to the joint surface of the main body and the accessory body; the control hole A and the control hole B are parallel to the reversing hole A and the reversing hole B; the control oil inlet channel A comprises a control hole A arranged on the main body and a control hole oil inlet hole A arranged on the accessory body; the control oil inlet channel B comprises a control hole B arranged on the main body and a control hole oil inlet hole B arranged on the accessory body; the control hole A is communicated with the bottom of the main hole A, and the control hole B is communicated with the bottom of the main hole B; the oil inlet A is communicated with the oil inlet B of the control hole, and the oil inlet B is communicated with the oil inlet A of the control hole.

The invention provides a processing method of a hydraulic integrated lock for an electro-hydraulic push rod, which comprises the following steps:

S1: processing a main hole A and a main hole B on a lathe;

S2: machining a hole A and a hole B on a lathe;

s3: machining a reversing hole A and a reversing hole B on the drilling machine;

s4: a throttle valve hole A and a throttle valve hole B are processed on the drilling machine;

S5: processing an oil return hole A and an oil return hole B on a drilling machine;

s6: processing a process hole 601A and a process hole 602A on the drilling machine; a process hole 101A, a process hole 102A; closing the apertures of the process holes 601A and 602A; hole 101A and 102A

The mouth is closed;

S7: processing a process hole 701A and a process hole 702A on a drilling machine; closing the apertures of the process holes 701A and 702A;

S8: fixing the main body on an angle clamp, and respectively processing the process holes to ensure that the hole bottoms of the control hole A and the main hole B are communicated and the hole bottoms of the control hole B and the main hole A are communicated.

The accessory processing method comprises the following steps:

S1: an oil inlet A and an oil inlet B are processed on the drilling machine;

S2: processing an overflow valve oil return hole A and an overflow valve oil return hole B on the drilling machine;

s3: processing a control hole oil inlet hole A and a control hole oil inlet hole B on the drilling machine;

S4: fixing the accessory on an angle clamp, and respectively processing process holes to enable an oil inlet A to be communicated with an oil inlet A of a control hole and enable an oil inlet B to be communicated with an oil inlet B of the control hole;

S5: and machining an overflow valve hole A and an overflow valve hole B on the lathe.

The invention also provides a processing method of the hydraulic integrated lock for the electro-hydraulic push rod, which comprises the following steps:

S1: processing a main hole A and a main hole B on a lathe;

S2: machining a hole A and a hole B on a lathe;

S6: processing a process hole and a process hole 602A on a drilling machine; hole 601A and 602A

The mouth is closed;

The accessory processing method comprises the following steps:

S1: an oil inlet A and an oil inlet B are processed on the drilling machine;

S1: processing a main hole A and a main hole B on a lathe;

S2: machining a hole A and a hole B on a lathe;

S6: processing a process hole 601A and a process hole 602A on the drilling machine; a process hole 102A; closing the apertures of the process holes 601A and 602A; closing the orifice of the process hole 102A;

The accessory processing method comprises the following steps:

S1: an oil inlet A and an oil inlet B are processed on the drilling machine;

The invention also provides an electrohydraulic push rod device which comprises a driving device, an oil tank and an oil pump connected with the driving device, and also provides a hydraulic integrated lock for the electrohydraulic push rod; the oil tank is provided with a manhole, and the manhole is provided with a manhole cover; the electrohydraulic push rod is connected with the oil pump through a hydraulic integrated lock and is arranged below the manhole.

Further, the throttle valve is led out of the manhole cover.

Further, the pressure gauge hole is provided with a pressure gauge, and the pressure gauge is led out of the manhole cover.

The invention also provides an overhaul method of the electro-hydraulic push rod device, which comprises the following steps:

s1: opening the manhole cover;

S2: removing the one-way valve;

S3: overhauling and cleaning the one-way valve;

S4: installing a check valve after maintenance and cleaning;

S5: and installing a service hole cover.

Compared with the prior art, the hydraulic integrated lock for the electro-hydraulic push rod, the processing method, the device and the overhauling method have the following advantages: the hydraulic integrated lock for the electro-hydraulic push rod is of a symmetrical structure left and right, is convenient to process, works in a mode of external circulation of pressure oil return on hydraulic oil path control, is provided with the one-way valves on the two main holes A and the main hole B, is provided with the reversing valves on the two reversing holes A and the reversing hole B, realizes that oil is fed from an oil tank on one side of the holes A and B, and hydraulic oil returned to the oil tank on one side flows unidirectionally, effectively realizes heat dissipation, avoids the increase of oil temperature caused by direct circulation of the hydraulic oil in two working cavities of the electro-hydraulic push rod, avoids internal leakage caused by the increase of the oil temperature, and prolongs the service life of a hydraulic part and the operation precision of the electro-hydraulic push rod; meanwhile, the check valve of the hydraulic integrated lock for the electro-hydraulic push rod is arranged at a position which is convenient to detach at the lower side of the overhaul hole of the electro-hydraulic push rod device, and when the check valve is overhauled and cleaned, the check valve can be conveniently taken down only by taking down the overhaul hole cover, so that the complexity of overhauling the check valve is greatly reduced, and the overhaul and cleaning time of the check valve is greatly shortened.

Description of the drawings:

FIG. 1 is a schematic diagram of the hydraulic integrated lock principle for an electro-hydraulic push rod of the invention;

FIG. 2 is a front view of the hydraulic integrated lock body 24 for an electro-hydraulic push rod of the present invention;

FIG. 3 is a top view of the hydraulic integrated lock body 24 for an electro-hydraulic push rod of the present invention;

FIG. 4 is a rear view of the hydraulic integrated lock body 24 for an electro-hydraulic push rod of the present invention;

FIG. 5 is a left side view of the hydraulic integrated lock body 24 for an electro-hydraulic push rod of the present invention;

FIG. 6 is a right side view of the hydraulic integrated lock body 24 for an electro-hydraulic push rod of the present invention;

FIG. 7 is a cross-sectional view A-A of FIG. 2;

FIG. 8 is a cross-sectional view B-B of FIG. 3;

FIG. 9 is a cross-sectional view of C-C of FIG. 4;

FIG. 10 is a D-D sectional view of FIG. 6;

FIG. 11 is a front view of the hydraulic integrated lock 25 for an electro-hydraulic push rod of the present invention;

FIG. 12 is a top view of the hydraulic integrated lock 25 for an electro-hydraulic push rod of the present invention;

FIG. 13 is a bottom view of the hydraulic integrated lock assembly 25 for an electro-hydraulic push rod of the present invention;

FIG. 14 is a right side view of the hydraulic integrated lock 25 for an electro-hydraulic push rod of the present invention;

FIG. 15 is a cross-sectional view A-A of FIG. 12;

FIG. 16 is a schematic view of a first embodiment of a hydraulic integrated lock for an electro-hydraulic push rod according to the present invention;

FIG. 17 is a cross-sectional view A-A of FIG. 16;

FIG. 18 is a B-B cross-sectional view of FIG. 16;

FIG. 19 is a C-C cross-sectional view of FIG. 16;

FIG. 20 is a D-D sectional view of FIG. 16;

FIG. 21 is a front view of a second embodiment of the hydraulic integrated lock for an electro-hydraulic push rod of the present invention;

FIG. 22 is a top view of a second embodiment of the hydraulic integrated lock for an electro-hydraulic push rod of the present invention;

FIG. 23 is a cross-sectional view A-A of FIG. 21;

FIG. 24 is a B-B cross-sectional view of FIG. 21;

FIG. 25 is a front view of a third embodiment of the hydraulic integrated lock for an electro-hydraulic push rod of the present invention;

FIG. 26 is a top view of a third embodiment of the hydraulic integrated lock for an electro-hydraulic push rod of the present invention;

FIG. 27 is a cross-sectional view A-A of FIG. 26;

FIG. 28 is a B-B cross-sectional view of FIG. 25;

FIG. 29 is a schematic view of an electro-hydraulic putter device according to the present invention;

The reference numerals are: 101-A hole, 102-B hole, 201-main hole A, 202-main hole B, 301-reversing hole A, 302-reversing hole B, 401-throttle valve hole A, 402-throttle valve hole B, 501-oil return hole A, 502-oil return hole B, 601-main hole connecting hole A, 602-main hole connecting hole B, 701-main hole connecting hole B A, 702-main hole connecting hole B, 801-control hole A, 802-control hole B, 901-oil inlet hole A, 902-oil inlet hole B, 1001-overflow valve hole A, 1002-overflow valve hole B, 1101-overflow valve oil return hole A, 1102-overflow valve oil return hole B, 1201-control hole oil inlet hole A, 1202-control hole oil inlet hole B, 13-throttle valve, 14-overflow valve, 15-reversing valve, 16-reversing valve return spring, 17-control piston, 1701-primary, 1702-secondary, 18-check valve, 19-check valve body, 20-check valve core, 21-steel ball, 22-main body, 23-end cover, 24-main body, 25-hole cover, 26-29-drain cover, 31-drain cover, 32-drain cover, oil tank, and service device.

The specific embodiment is as follows:

The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

In order to better understand the purpose, structure and function of the present invention, the hydraulic integrated lock for electro-hydraulic push rod, the processing method, the device and the maintenance method of the present invention are described in further detail below with reference to the accompanying drawings.

The embodiment of the hydraulic integrated lock for the electro-hydraulic push rod is as follows:

The device comprises a main body 24 and an accessory body 25, wherein the structure of the accessory body 25 is shown in fig. 11, 12, 13, 14 and 15, and is specifically as follows:

The auxiliary body 25 is provided with a pair of oil inlet holes A901 and B902 which are perpendicular to the combination surface of the main body 24 and the auxiliary body 25, and also provided with a pair of control hole oil inlet holes A1201 and B1202 which are parallel to the oil inlet holes A901 and B902, wherein the oil inlet holes A901 are communicated with the control hole oil inlet holes A1201 through a process hole, and the oil inlet holes B902 are communicated with the control hole oil inlet holes B1202 through a process hole.

In order to prevent the hydraulic pressure of the electro-hydraulic push rod from being too large and causing safety accidents, an overpressure protection device is arranged on the accessory body 25, and the following concrete steps are as follows:

A pair of overflow valve holes A1001 and B1002 perpendicular to the oil inlet holes A901 and B902 are arranged on the accessory body 25; the bottom of the overflow valve hole A1001 is communicated with the oil inlet hole A901, and the bottom of the overflow valve hole B1002 is communicated with the oil inlet hole B902; the accessory body 25 is also provided with a pair of overflow valve oil return holes A1101 and B1102 which are perpendicular to the overflow valve hole A1001 and the overflow valve hole B1002; the bottom of the relief valve oil return hole A1101 is communicated with the relief valve hole A1001, and the bottom of the relief valve oil return hole B1102 is communicated with the relief valve hole B1002. And the overflow valve hole A1001 and the overflow valve hole B1002 are respectively provided with the overflow valve 14, the overflow valve 14 can be opened when the oil pressure is too high, and hydraulic oil flows out from the overflow valve oil return hole A1101 and the overflow valve oil return hole B1102 to the oil tank 29, so that the pressure relief effect is achieved, and the working reliability of the hydraulic push rod is ensured.

In order to achieve the purpose of conveniently overhauling and cleaning the check valve 18, the hydraulic integrated lock for the electro-hydraulic push rod provides three embodiments for the structure of the main body 24, and the three embodiments are as follows:

embodiment one of the structure of the main body 24:

As shown in fig. 2 to 10 and 16 to 20, a pair of a holes 101 and B holes 102 are provided in the upper part of the main body 24 and are vertical to the joint surface between the main body 24 and the appendage 25; the main body 24 is also provided with a pair of main holes A201 and B202 which are perpendicular to the holes A101 and B102; a pair of reversing holes A301 and B302 parallel to the holes A101 and B102; a pair of throttle valve holes A401 and B402 perpendicular to the holes A101 and B102; the lower orifice of the throttle valve hole A401 is communicated with the reversing hole A301, and the lower orifice of the throttle valve hole B402 is communicated with the reversing hole B302; the main body 24 is also provided with a pair of main hole connecting holes A601 and B602 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the primary hole connecting hole A601 is used for communicating the A hole 101 with the primary hole A201; primary orifice connecting bore one B602 communicates B orifice 102 with primary orifice B202; the main body 24 is also provided with a pair of main hole connecting holes II A701 and a main hole connecting hole II B702 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the second main hole connecting hole A701 is used for communicating the reversing hole A301 with the main hole A201; the second main hole connecting hole B702 is used for communicating the reversing hole B302 with the main hole B202; the main body 24 is also provided with a pair of control holes A801 and B802 which are parallel to the reversing holes A301 and B302; the control hole A801 is communicated with the bottom of the main hole B202 through a process hole; the control hole B802 is communicated with the bottom of the main hole A201 through a process hole.

A pair of control pistons 17 and a pair of check valves 18 are also provided on the main body 24; the control piston 17 comprises a piston-shaped plug body, and a thimble is arranged at one end of the plug body; the control piston 17 is arranged at the bottoms of the main hole A201 and the main hole B202 respectively, the ejector pins on the control piston 17 face the orifices of the main hole A201 and the main hole B202, and the control piston 17 is coaxial with the main hole A201 and the main hole B202; the check valve 18 is respectively arranged on the main hole A201 and the main hole B202 and faces to the thimble on the control piston 17, and the check valve 18 can be opened under the action of the thimble on the control piston 17.

The specific structure of the check valve 18 comprises a check valve body 19 with a middle hole, a check valve core 20, a steel ball 21, a push rod 22, a spring and an end cover 23; the check valve 19 is fixed in the main hole A201 and the main hole B202; the end cover 23 is fixed in a middle hole on the outer side of the one-way valve body 19; the unidirectional valve core 20 is provided with a stepped hole on the axis; the one-way valve core 20 is movably arranged in a middle hole of the one-way valve body 19; the small step hole of the one-way valve core 20 faces the control piston 17; the spring is sleeved on the rod body of the ejector rod 22; the head of the ejector rod 22 contacts the steel ball 21; the steel ball 21 is matched with the large stepped hole of the one-way valve core 20 and can be movably arranged in the large stepped hole of the one-way valve core 20; the end face of the end cover 23 facing the ejector rod 22 is provided with a step hole; the small step hole of the end cover 23 is matched with the rod body of the ejector rod 22; the large stepped bore of the end cap 23 accommodates the spring.

The ejector pins of the control piston 17 include a primary ejector pin 1701 and a secondary ejector pin 1702; the diameter of the first-stage thimble 1701 is smaller than the diameter of the small step hole of the unidirectional valve core 20; the axial length of the first-stage thimble 1701 is greater than that of the small step hole of the unidirectional valve core 20; the diameter of the secondary thimble 1702 is larger than the diameter of the small stepped hole of the check valve core 20 and smaller than the diameter of the middle hole of the check valve core 20.

By means of the structural design, when the check valve 18 is opened, two stages of opening are performed, namely, the steel ball 21 is propped first, then the check valve 18 is propped, when the steel ball 21 is propped open, unloading can be performed rapidly, the excessive pressure oil flow is avoided, and then the check valve core 20 is opened, so that a piston rod in the electro-hydraulic push rod moves stably.

The main body 24 is also provided with a pair of reversing valves 15 and a pair of reversing valve return springs 16; the reversing valve 15 has a shaft and a piston head; the reversing valve reset spring 16 is sleeved on the rod body of the reversing valve 15; the piston head of the reversing valve 15 is arranged in the reversing hole A301 and the reversing hole B302 towards the joint surface of the main body 24 and the accessory body 25; the piston head of the reversing valve 15 is matched with the reversing hole A301 and the reversing hole B302, the diameter of the reversing hole A301 is larger than that of the oil inlet hole A901, and the diameter of the reversing hole B302 is larger than that of the oil inlet hole B902, so that the reversing valve 15 is jacked up when hydraulic oil enters the reversing hole A301 through the oil inlet hole A901 and hydraulic oil enters the reversing hole B302 through the oil inlet hole B902.

In order to adjust the speed of the piston rod in the hydraulic ram, a pair of throttle valves 13, oil return holes a501 and oil return holes B502 perpendicular to the throttle valve holes a401 and B402 are provided in the main body 24; the bottom of the oil return hole A501 is communicated with the throttle valve hole A401; the bottom of the oil return hole B502 is communicated with the throttle valve hole B402; the throttle valve 13 is provided in the throttle valve hole a401 and the throttle valve hole B402, respectively, and the flow rate of the hydraulic oil flowing from the throttle valve hole a401 and the throttle valve hole B402 to the oil return holes a501 and B502 can be controlled by adjusting the throttle valve 13.

Second embodiment of the structure of the main body 24:

referring to fig. 2 to 10, as shown in fig. 21 to 24, a pair of a holes 101 and B holes 102 are provided in the upper portion of the main body 24, and are vertical to the joint surfaces of the main body 24 and the appendage 25; the main body 24 is also provided with a pair of main holes A201 and B202 which are parallel to the holes A101 and B102; a pair of reversing holes A301 and B302 parallel to the holes A101 and B102; a pair of throttle valve holes A401 and B402 perpendicular to the holes A101 and B102; the lower orifice of the throttle valve hole A401 is communicated with the reversing hole A301, and the lower orifice of the throttle valve hole B402 is communicated with the reversing hole B302; the main body 24 is also provided with a pair of main hole connecting holes A601 and B602 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the primary hole connecting hole A601 is used for communicating the A hole 101 with the primary hole A201; primary orifice connecting bore one B602 communicates B orifice 102 with primary orifice B202; the main body 24 is also provided with a pair of main hole connecting holes II A701 and a main hole connecting hole II B702 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the second main hole connecting hole A701 is used for communicating the reversing hole A301 with the main hole A201; the second main hole connecting hole B702 is used for communicating the reversing hole B302 with the main hole B202; the main body 24 is also provided with a pair of control holes A801 and B802 which are parallel to the reversing holes A301 and B302; the control hole A801 is communicated with the bottom of the main hole B202 through a process hole; the control hole B802 is communicated with the bottom of the main hole A201 through a process hole.

Embodiment three of the structure of the main body 24:

Referring to fig. 2 to 10, as shown in fig. 25 to 28, a pair of a holes 101 and B holes 102 are provided in the upper portion of the main body 24, and are vertical to the joint surface between the main body 24 and the appendage 25; main body 24 is also provided with a main hole A201 parallel to A hole 101 and a main hole B202 perpendicular to B hole 102; a pair of reversing holes A301 and B302 parallel to the holes A101 and B102; a pair of throttle valve holes A401 and B402 perpendicular to the holes A101 and B102; the lower orifice of the throttle valve hole A401 is communicated with the reversing hole A301, and the lower orifice of the throttle valve hole B402 is communicated with the reversing hole B302; the main body 24 is also provided with a pair of main hole connecting holes A601 and B602 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the primary hole connecting hole A601 is used for communicating the A hole 101 with the primary hole A201; primary orifice connecting bore one B602 communicates B orifice 102 with primary orifice B202; the main body 24 is also provided with a pair of main hole connecting holes II A701 and a main hole connecting hole II B702 which are horizontal to the joint surfaces of the main body 24 and the accessory body 25; the second main hole connecting hole A701 is used for communicating the reversing hole A301 with the main hole A201; the second main hole connecting hole B702 is used for communicating the reversing hole B302 with the main hole B202; the main body 24 is also provided with a pair of control holes A801 and B802 which are parallel to the reversing holes A301 and B302; the control hole A801 is communicated with the bottom of the main hole B202 through a process hole; the control hole B802 is communicated with the bottom of the main hole A201 through a process hole.

The first, second and third embodiments of the main body 24 are respectively fixed with the accessory body 25, and the oil inlet hole A901 and the reversing hole A301 are butted to form an oil inlet channel A; the oil inlet hole B902 and the reversing hole B302 are in butt joint to form an oil inlet channel B; the control hole oil inlet hole A1201 is in butt joint with the control hole A801 to form a control oil inlet channel A; control hole oil feed hole B1202 and control hole B802 are abutted to form control oil feed passage B. Thus, the pair of check valves 18 of the hydraulic integrated lock for an electro-hydraulic push rod of the first embodiment are located on the side faces perpendicular to the joint faces of the main body 24 and the appendage 25; the pair of check valves 18 of the hydraulic integrated lock for the electro-hydraulic push rod of the second embodiment are positioned on the side surfaces parallel to the joint surfaces of the main body 24 and the auxiliary body 25; in the third embodiment, one check valve 18 of the hydraulic integrated lock for an electro-hydraulic push rod is located on a side perpendicular to the joint surface of the main body 24 and the auxiliary body 25, and one check valve 18 is located on a side parallel to the joint surface of the main body 24 and the auxiliary body 25. The hydraulic integrated lock for the electro-hydraulic push rod with the three layouts can realize convenient maintenance and cleaning.

The hydraulic integrated lock for the electro-hydraulic push rod has a symmetrical structure, and is convenient to process. The invention discloses a hydraulic integrated lock, which is essentially a hydraulic oil control device of an electro-hydraulic push rod, and is used for synchronously controlling hydraulic oil (one inlet and one outlet) in two working oil cavities (a rod cavity and a rodless cavity) of the electro-hydraulic push rod, so that pressure balance at two sides is ensured, the two paths of hydraulic oil are isolated and locked in an isobaric environment in the operation process, internal leakage is avoided, and the operation precision is further improved.

The working principle of the hydraulic integrated lock for the electro-hydraulic push rod is shown in fig. 1, 19 and 20, in the working state, hydraulic oil is driven by the oil pump 28 to enter from the oil inlet hole B902, and three paths of hydraulic oil flow:

the first path is as follows: when the system oil pressure is too high, the relief valve 14 is opened, and the hydraulic oil flows into the relief valve oil return hole B1102 and then flows into the oil tank 29;

the second path: hydraulic oil pushes up the reversing valve 15, flows into the reversing hole B302, flows through the main hole connecting hole B702 and flows into the main hole B202, the one-way valve 18 on the main hole B202 is opened under the pressure of the hydraulic oil, and the hydraulic oil flows through the main hole connecting hole B602 (the main hole connecting hole B701 is blocked by the reversing valve 15); flows into the B hole 102 to finish oil inlet of the B hole 102;

Third way: hydraulic oil flows into the oil inlet hole B1202 of the control hole, flows into the control hole B802 and flows into the bottom of the main hole A201; the first-stage thimble 1701 and the second-stage thimble 1702 of the control piston 17 positioned at the bottom of the main hole A201 jack the steel ball 21 and the one-way valve core 20 of the one-way valve 18 on the main hole A201 respectively, hydraulic oil flows into the main hole A201 from the hole A101, flows through the main hole connecting hole II A701 and flows into the reversing hole A101, at the moment, the reversing valve 15 on the reversing hole A101 is not jacked, the hydraulic oil flows into the throttle valve hole A401, flows into the oil return hole A501 and enters the oil tank 29, and oil return of the hole A101 is completed.

The working principle of oil feeding from the oil feeding hole A901 is the same as that of oil feeding from the oil feeding hole B902, and oil feeding from the oil feeding hole A101 and oil feeding from the oil feeding hole B102 are realized. The two synchronously act, so that the reciprocating motion of the piston rod in the cavity is realized.

The main body 24 and the auxiliary body 25 of the first, second and third embodiments are connected to each other, and the oil inlet control passage a and the oil inlet passage a are connected to the bottom of the main hole B (202); the oil inlet control channel B is communicated with the oil inlet channel B and is communicated with the hole bottom of the main hole A (201), and the communication structure adopts a mode of communicating the hole bottom of the control hole A301 with the hole bottom of the main hole B202, communicating the hole bottom of the control hole B302 with the hole bottom of the main hole A201, communicating the oil inlet A901 with the oil inlet A1201 of the control hole, and communicating the oil inlet B902 with the oil inlet B1202 of the control hole; the mode of communicating the hole bottoms of the control hole A301 and the main hole A201, communicating the hole bottoms of the control hole B302 and the main hole B202, communicating the oil inlet hole A901 and the oil inlet hole B1202 of the control hole, and communicating the oil inlet hole B902 and the oil inlet hole A1201 of the control hole can also be adopted to achieve the working principle and the purpose of the hydraulic integrated lock for the electro-hydraulic push rod.

In order to facilitate understanding of the pressure condition of hydraulic oil in the hydraulic integrated lock for the electro-hydraulic push rod, a pressure gauge hole 32 perpendicular to the joint surface of the main body 24 and the auxiliary body 25 is arranged on the main body 24; drilling a process hole at the bottom of the pressure gauge hole 32 along the vertical direction, wherein the process hole is respectively communicated with the bottom of the main hole A201 and the bottom of the main hole B202; a pressure gauge is provided in the pressure gauge hole 32 so that the pressure condition of the hydraulic oil inside can be observed.

The invention discloses a hydraulic integrated lock for an electro-hydraulic push rod, a processing method, a device and an overhaul method, and the processing method for the hydraulic integrated lock for the electro-hydraulic push rod aims at the three embodiments specifically comprises the following steps:

the processing method of the appendage 25 specifically comprises the following steps:

S1: an oil inlet A901 and an oil inlet B902 are processed on the drilling machine;

S2: processing an overflow valve oil return hole A1101 and an overflow valve oil return hole B1102 on a drilling machine;

s3: processing a control hole oil inlet hole A1201 and a control hole oil inlet hole B1202 on the drilling machine;

S4: fixing the accessory 25 on an angle clamp, and respectively processing process holes to enable an oil inlet A901 and a control hole oil inlet A1201 to be communicated and enable an oil inlet B902 and a control hole oil inlet B1202 to be communicated;

S5: and machining an overflow valve hole A1001 and an overflow valve hole B1002 on a lathe.

The processing method of the first embodiment of the main body 24 specifically includes the following steps:

S1: machining a main hole A201 and a main hole B202 on a lathe;

S2: machining an A hole 101 and a B hole 102 on a lathe;

s3: machining a reversing hole A301 and a reversing hole B302 on a drilling machine;

S4: machining a throttle valve hole A401 and a throttle valve hole B402 on a drilling machine;

S5: processing an oil return hole A501 and an oil return hole B502 on a drilling machine;

S6: processing a process hole 601A and a process hole 602A on the drilling machine; a process hole 101A, a process hole 102A; closing the apertures of the process holes 601A and 602A; closing the apertures of the process holes 101A and 102A; forming a main hole connecting hole A601 and a main hole connecting hole B602;

S7: processing a process hole 701A and a process hole 702A on a drilling machine; closing the apertures of the process holes 701A and 702A; forming a second main hole connecting hole A701 and a second main hole connecting hole B702;

S8: the main body 24 is fixed on an angle clamp, and processing holes are respectively processed, so that the hole bottoms of the control hole A801 and the main hole B202 are communicated, and the hole bottoms of the control hole B802 and the main hole A201 are communicated.

The processing method of the second embodiment of the main body 24 specifically includes the following steps:

S1: machining a main hole A201 and a main hole B202 on a lathe;

S2: machining an A hole 101 and a B hole 102 on a lathe;

s6: processing a process hole 601A and a process hole 602A on the drilling machine; closing the apertures of the process holes 601A and 602A; forming a main hole connecting hole A601 and a main hole connecting hole B602;

The processing method of the third embodiment of the main body 24 specifically includes the following steps:

S1: machining a main hole A201 and a main hole B202 on a lathe;

S2: machining an A hole 101 and a B hole 102 on a lathe;

S6: processing a process hole 601A and a process hole 602A on the drilling machine; a process hole 102A; closing the apertures of the process holes 601A and 602A; closing the orifice of the process hole 102A; forming a main hole connecting hole A601 and a main hole connecting hole B602;

The invention provides a hydraulic integrated lock for an electro-hydraulic push rod, a processing method, a device and an overhauling method, which comprise any one of the hydraulic integrated locks for the electro-hydraulic push rod of the three embodiments, and provide an electro-hydraulic push rod device which can conveniently overhaul and clean a one-way valve 18, as shown in fig. 29, and specifically comprises: the driving device 27, the oil pump 28 connected with the driving device 27, the oil tank 29, the overhaul hole 30 is arranged on the oil tank 29, and the hydraulic integrated lock for the electro-hydraulic push rod, which is provided with a pair of one-way valves 18 in the first embodiment and is positioned on the side surface perpendicular to the joint surface of the main body 24 and the accessory body 25, is also provided; the hydraulic integrated lock for the electro-hydraulic push rod, in which the pair of check valves 18 of the second embodiment are located on the side parallel to the joint surface of the main body 24 and the auxiliary body 25; one check valve 18 of the third embodiment is located on the side perpendicular to the junction surface of the main body 24 and the auxiliary body 25, and one check valve 18 is located on any one of the hydraulic integrated locks for electro-hydraulic push rods on the side parallel to the junction surface of the main body 24 and the auxiliary body 25; it is connected with an oil pump 28, placed in an oil tank 29, and an electro-hydraulic push rod is placed under a manhole 30 by a hydraulic integrated lock. The one-way valve 18 of the hydraulic integrated lock for the electro-hydraulic push rod of the first embodiment faces the manhole 30; the electrohydraulic push rod of the second embodiment is vertical to the overhaul hole 30 through the check valve 18 of the hydraulic integrated lock; the check valve 18 of the hydraulic integrated lock for the electro-hydraulic push rod of the third embodiment faces the manhole 30, and one check valve is perpendicular to the manhole 30, and the check valve 18 of the hydraulic integrated lock for the electro-hydraulic push rod of the third embodiment can be conveniently taken down from the manhole 30 for maintenance and cleaning, the manhole 30 is also provided with a manhole cover 31, and after maintenance and cleaning of the check valve 18 are completed, the manhole cover 31 is fixed on the manhole 30 to seal the oil tank 29.

The throttle valve 13 may be led out of the manhole cover 31 for convenient operation of the throttle valve 13, and in addition, a pressure gauge provided on the pressure gauge hole 32 may be led out of the manhole cover 31 for convenient viewing of the pressure gauge value.

The maintenance method of the electro-hydraulic push rod device specifically comprises the following steps:

S1: opening the manhole cover 31;

S2: removing the one-way valve 18;

S3: overhauling and cleaning the check valve 18;

S4: installing a check valve 18 after maintenance and cleaning;

S5: a manway cover 31 is installed.

Therefore, the hydraulic integrated lock for the electro-hydraulic push rod, the processing method, the device and the maintenance method have the advantages that the operation is simple, the use is convenient, and when the check valve 18 is maintained and cleaned, only the maintenance hole cover 31 is required to be opened, and the existing complex operation steps are not required: firstly discharging oil, then removing the motor, sealing the flange plate and the like, and shortening the maintenance and cleaning time of the check valve 18 from 5 to 6 hours before to about 10 minutes, thereby greatly improving the maintenance efficiency.

The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A hydraulic integrated lock for an electro-hydraulic push rod, comprising: the device comprises a main body (24) and an accessory body (25) fixed with the main body (24), wherein the main body (24) is provided with an A hole (101) and a B hole (102), and is characterized in that the main body (24) is also provided with a main hole A (201), a main hole B (202), a reversing hole A (301), a reversing hole B (302), a throttle valve hole A (401) and a throttle valve hole B (402);

The throttle valve hole A (401) is communicated with the reversing hole A (301), and the throttle valve hole B (402) is communicated with the reversing hole B (302);

A pair of main hole connecting holes A (601) and a pair of main hole connecting holes B (602) are also arranged on the main body (24); the primary hole connecting hole A (601) is used for communicating the hole A (101) with the primary hole A (201); the primary hole connecting hole B (602) is used for communicating the B hole (102) with the primary hole B (202);

The main body (24) is also provided with a pair of main hole connecting holes II A (701) and a pair of main hole connecting holes II B (702); the main hole connecting hole II A (701) is used for communicating the reversing hole A (301) with the main hole A (201); the main hole connecting hole B (702) is used for communicating the reversing hole B (302) with the main hole B (202);

The device also comprises a pair of reversing control devices respectively arranged on the reversing hole A (301) and the reversing hole B (302); when the reversing control device is used for oil feeding, the orifice of the communicating part of the reversing hole A (301) and the throttle valve hole A (401) and the orifice of the communicating part of the reversing hole B (302) and the throttle valve hole B (402) are closed, the orifice of the reversing hole A (301) and the orifice of the reversing hole B are opened, and the orifice of the communicating part of the main hole connecting hole II A (701) and the reversing hole A (301) and the orifice of the communicating part of the main hole connecting hole II B (702) and the reversing hole B (302) are opened; when the reversing control device returns oil, opening an orifice at the communication position of the reversing hole A (301) and the throttle valve hole A (401) and an orifice at the communication position of the reversing hole B (302) and the throttle valve hole B (402); closing the orifice of the reversing hole A (301) and the orifice of the reversing hole B;

The device also comprises a pair of unidirectional control devices respectively arranged on the main hole A (201) and the main hole B (202); the unidirectional control device can be opened under the action of external force, and can be automatically closed when the external force disappears; when the unidirectional control device is closed, the hole A (101), the main hole A (201), the hole B (102) and the main hole B (202) are cut off; when the unidirectional control device is opened, the hole A (101) is communicated with the main hole A (201) and the hole B (102) are communicated with the main hole B (202);

an oil inlet A (901) and an oil inlet B (902) are arranged on the accessory body (25);

The oil inlet hole A (901) is in butt joint with the reversing hole A (301) to form an oil inlet channel A, and the aperture of the oil inlet hole A (901) is smaller than that of the reversing hole A (301); the oil inlet hole B (902) and the reversing hole B (302) are in butt joint to form an oil inlet channel B, and the aperture of the oil inlet hole B (902) is smaller than that of the reversing hole B (302);

a control oil inlet channel A and a control oil inlet channel B are arranged on the combination body of the main body (24) and the accessory body (25);

the control oil inlet channel A is communicated with the oil inlet channel A and is communicated to the bottom of the main hole B (202); the control oil inlet channel B is communicated with the oil inlet channel B and communicated to the bottom of the main hole A (201).

2. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 1, wherein: the throttle valve hole A (401) and the throttle valve hole B (402) are respectively provided with a throttle device; the throttling device can adjust the flow of the hydraulic oil on the throttling valve hole A (401) and the throttling valve hole B (402).

3. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 2, wherein: the throttle device comprises an oil return hole A (501) arranged on a throttle valve hole A (401), an oil return hole B (502) arranged on a throttle valve hole B (402), and a pair of throttle valves (13) respectively arranged on the throttle valve hole A (401) and the throttle valve hole B (402); the throttle valve (13) can adjust the flow of the hydraulic oil.

4. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 1, wherein: the auxiliary body (25) is provided with an overflow valve hole A (1001) communicated with the oil inlet hole A (901), an overflow valve hole B (1002) communicated with the oil inlet hole B (902) and a pair of overflow valves (14) respectively arranged on the overflow valve hole A (1001) and the overflow valve hole B (1002); an overflow valve oil return hole A (1101) is arranged on the overflow valve hole A (1001); an overflow valve oil return hole B (1102) is arranged on the overflow valve hole B (1002); the relief valve (14) can regulate the hydraulic oil pressure.

5. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 1, wherein: the reversing control device comprises a reversing valve (15) and a reversing valve return spring (16); the reversing valve (15) has a shaft and a piston head; the reversing valve reset spring (16) is sleeved on the rod body of the reversing valve (15); the piston heads of the reversing valves (15) are downwards arranged in the reversing holes A (301) and B (302) respectively.

6. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 1, wherein: the unidirectional control device has a primary flow control function and a secondary flow control function, and the hydraulic oil flow of the secondary flow control function is larger than that of the primary flow control function.

7. The hydraulic integrated lock for an electro-hydraulic push rod of claim 6, wherein: the unidirectional control device comprises a control piston (17) and a unidirectional valve (18); the control piston (17) comprises a piston-shaped plug body, and a thimble is arranged at one end of the plug body; the control piston (17) is respectively arranged at the bottoms of the main holes A (201) and B (202), and the ejector pins on the control piston (17) face the orifices of the main holes A (201) and B (202); the check valve (18) is respectively arranged on the main hole A (201) and the main hole B (202) and faces to the thimble on the control piston (17), and the check valve (18) can be opened under the pushing and pressing of the thimble on the control piston (17).

8. The hydraulic integrated lock for an electro-hydraulic push rod of claim 7, wherein: the one-way valve (18) comprises a one-way valve body (19) with a middle hole, a one-way valve core (20), a steel ball (21), a push rod (22), a spring and an end cover (23); the one-way valve body (19) is respectively fixed in the main hole A (201) and the main hole B (202); the end cover (23) is fixed in a middle hole at the outer side of the one-way valve body (19);

The unidirectional valve core (20) is provided with a stepped hole on the axis; the one-way valve core (20) can be movably arranged in a middle hole of the one-way valve body (19); the small step hole of the one-way valve core (20) faces the control piston (17);

The spring is sleeved on the rod body of the ejector rod (22); the head of the ejector rod (22) is contacted with the steel ball (21); the steel ball (21) is matched with the large stepped hole of the one-way valve core (20) and can be movably arranged in the large stepped hole of the one-way valve core (20);

The end face of the end cover (23) facing the ejector rod (22) is provided with a step hole; the small step hole of the end cover (23) is matched with the rod body of the ejector rod (22); the large step hole of the end cover (23) is matched with the spring.

9. The hydraulic integrated lock for an electro-hydraulic push rod of claim 8, wherein: the ejector pin of the control piston (17) comprises a first-stage ejector pin (1701) and a second-stage ejector pin (1702); the diameter of the primary thimble (1701) is smaller than the diameter of a small step hole of the unidirectional valve core (20); the axial length of the primary thimble (1701) is greater than that of the small step hole of the one-way valve core (20);

the diameter of the second-stage thimble (1702) is larger than the diameter of the small step hole of the one-way valve core (20) and smaller than the diameter of the middle hole of the one-way valve core (20).

10. The hydraulic integrated lock for an electro-hydraulic push rod according to claim 1, wherein: a pressure gauge hole (32) is formed in the main body (24); the hole bottoms of the pressure gauge holes (32) are respectively communicated with the hole bottoms of the main holes A (201) and the hole bottoms of the main holes B (202).

11. A hydraulic integrated lock for electro-hydraulic push rods according to any one of claims 1 to 10, characterized in that: the orifices of the main hole A (201) and the main hole B (202) are positioned on the side surface of the main body (24) perpendicular to the contact surface of the main body (24) and the accessory body (25).

12. A hydraulic integrated lock for electro-hydraulic push rods according to any one of claims 1 to 10, characterized in that: the orifices of the main hole A (201) and the main hole B (202) are positioned on the side surface of the main body (24) parallel to the contact surface of the main body (24) and the accessory body (25).

13. A hydraulic integrated lock for electro-hydraulic push rods according to any one of claims 1 to 10, characterized in that: the orifice of the main hole A (201) is positioned on the side surface of the main body (24) parallel to the contact surface of the main body (24) and the accessory body (25); the orifice of the main hole B (202) is positioned on the side surface of the main body (24) perpendicular to the contact surface of the main body (24) and the accessory body (25).

14. The hydraulic integrated lock for an electro-hydraulic push rod of claim 11, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main holes A (201) and the main holes B (202) are perpendicular to the holes A (101) and B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole B (202), and the control hole B (802) is communicated with the hole bottom of the main hole A (201); the oil inlet A (901) is communicated with the control hole oil inlet A (1201), and the oil inlet B (902) is communicated with the control hole oil inlet B (1202).

15. The hydraulic integrated lock for an electro-hydraulic push rod of claim 11, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main holes A (201) and the main holes B (202) are perpendicular to the holes A (101) and B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole A (201), and the control hole B (802) is communicated with the hole bottom of the main hole B (202); the oil inlet A (901) is communicated with the control hole oil inlet B (1202), and the oil inlet B (902) is communicated with the control hole oil inlet A (1201).

16. The hydraulic integrated lock for an electro-hydraulic push rod of claim 12, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main holes A (201) and B (202) are parallel to the holes A (101) and B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole B (202), and the control hole B (802) is communicated with the hole bottom of the main hole A (201); the oil inlet A (901) is communicated with the control hole oil inlet A (1201), and the oil inlet B (902) is communicated with the control hole oil inlet B (1202).

17. The hydraulic integrated lock for an electro-hydraulic push rod of claim 12, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main holes A (201) and B (202) are parallel to the holes A (101) and B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole A (201), and the control hole B (802) is communicated with the hole bottom of the main hole B (202); the oil inlet A (901) is communicated with the control hole oil inlet B (1202), and the oil inlet B (902) is communicated with the control hole oil inlet A (1201).

18. The hydraulic integrated lock for an electro-hydraulic push rod of claim 13, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main hole A (201) is parallel to the hole A (101), and the main hole B (202) is perpendicular to the hole B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole B (202), and the control hole B (802) is communicated with the hole bottom of the main hole A (201); the oil inlet A (901) is communicated with the control hole oil inlet A (1201), and the oil inlet B (902) is communicated with the control hole oil inlet B (1202).

19. The hydraulic integrated lock for an electro-hydraulic push rod of claim 13, wherein: the control oil inlet channel A comprises a control hole A (801) arranged on the main body (24) and a control hole oil inlet hole A (1201) arranged on the accessory body (25); the control oil inlet channel B comprises a control hole B (802) arranged on the main body (24) and a control hole oil inlet hole B (1202) arranged on the accessory body (25); the A hole (101) and the B hole (102) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the main hole A (201) is parallel to the hole A (101), and the main hole B (202) is perpendicular to the hole B (102); the reversing holes A (301) and the reversing holes B (302) are parallel to the holes A (101) and the holes B (102); the throttle valve hole A (401) and the throttle valve hole B (402) are perpendicular to the hole A (101) and the hole B (102); the joint surfaces of the main hole connecting hole A (601), the main hole connecting hole B (602), the main body (24) and the accessory body (25) are parallel; the joint surfaces of the main hole connecting hole II A (701) and the main hole connecting hole II B (702) and the main body (24) and the accessory body (25) are parallel; the control hole A (801), the control hole B (802) and the reversing hole A (301) are parallel to the reversing hole B (302); the control hole A (801) is communicated with the hole bottom of the main hole A (201), and the control hole B (802) is communicated with the hole bottom of the main hole B (202); the oil inlet A (901) is communicated with the control hole oil inlet B (1202), and the oil inlet B (902) is communicated with the control hole oil inlet A (1201).

20. A hydraulic integrated lock for electro-hydraulic push rods according to any one of claims 14 to 19 wherein: the oil inlet A (901) and the oil inlet B (902) are vertical to the joint surfaces of the main body (24) and the accessory body (25); the control hole oil inlet A (1201), the control hole oil inlet B (1202) are parallel to the oil inlet A (901) and the oil inlet B (902); the overflow valve hole A (1001), the overflow valve hole B (1002) are vertical to the oil inlet hole A (901) and the oil inlet hole B (902); the relief valve oil return hole A (1101), the relief valve oil return hole B (1102) and the relief valve hole A (1001) are perpendicular to the relief valve hole B (1002).

21. The utility model provides an electrohydraulic push rod device, includes drive arrangement (27), oil tank (29), oil pump (28) that are connected with drive arrangement (27), its characterized in that: a hydraulic integrated lock for an electro-hydraulic push rod according to any one of claims 11 to 19; the oil tank (29) is provided with a manhole (30), and the manhole (30) is provided with a manhole cover (31); the electrohydraulic push rod is connected with an oil pump (28) through a hydraulic integrated lock and is arranged under the overhaul hole (30).

22. An electro-hydraulic push rod assembly according to claim 21 wherein: the throttle valve (13) is led out of the manhole cover (31).

23. An electro-hydraulic push rod assembly according to claim 21 wherein: the pressure gauge hole (32) is provided with a pressure gauge, and the pressure gauge is led out of the manhole cover (31).

24. The method of servicing an electro-hydraulic push rod device of claim 21, wherein: comprises the following steps:

s1: opening the manhole cover (31);

S2: removing the one-way valve (18);

S3: overhauling and cleaning a one-way valve (18);

S4: installing a check valve (18) after maintenance and cleaning;

s5: and installing a service hole cover (31).