CN117212139A

CN117212139A - Novel volumetric pump

Info

Publication number: CN117212139A
Application number: CN202311357411.1A
Authority: CN
Inventors: 罗彦海; 钟浩杰
Original assignee: Wuxi Ruisheng Pump Co ltd
Current assignee: Wuxi Ruisheng Pump Co ltd
Priority date: 2023-10-19
Filing date: 2023-10-19
Publication date: 2023-12-12

Abstract

The application relates to the technical field of volumetric pumps, in particular to a novel volumetric pump which comprises a pump body, a feeding valve, a discharging valve, a piston cylinder and a driving mechanism, wherein the upper end of the pump body is provided with an inlet, the lower end of the pump body is provided with an outlet, the feeding valve is connected with the inlet, the discharging valve is connected with the outlet, the feeding valve and the discharging valve are respectively used for unidirectional feeding and discharging of the pump body, the piston cylinder is communicated with an inner cavity of the pump body and used for changing the size of the inner cavity of the pump body, when the inner cavity of the pump body is enlarged, the feeding valve is opened, slurry is filled into the inner cavity of the pump body under the action of gravity, when the inner cavity of the pump body is reduced, the feeding valve is closed, the slurry is pressed out from the discharging valve, and the driving mechanism is used for driving the piston cylinder to operate. The pump body adopts the mode of upper end feeding lower extreme ejection of compact to carry the ground paste, has solved the problem that traditional mechanical type diaphragm pump can not carry high concentration ground paste.

Description

Novel volumetric pump

Technical Field

The application relates to the technical field of volumetric pumps, in particular to a volumetric pump capable of conveying high-concentration slurry.

Background

The displacement pump is a general machine, has a plurality of types, is widely applied to various industries of national production, and is particularly applied to petroleum, chemical industry, plastic and synthetic materials and refrigeration technology in recent years along with the progress of scientific technology.

The existing volumetric pump generally adopts a mode of lower feeding and upper discharging, so that the feeding needs pumping or large-height feeding, therefore, the volumetric pump is only suitable for pressurizing slurry with the weight concentration of less than 65 percent, and when the slurry with high concentration and uneven concentration is conveyed, the slurry is easy to precipitate and block below a pump body, cannot be discharged, and is easy to cause diaphragm rupture.

Disclosure of Invention

The application aims to solve the technical problem of providing a novel volumetric pump, wherein a pump body adopts an upper-end feeding and lower-end discharging mode to convey slurry, and the problem that a traditional mechanical diaphragm pump cannot convey high-concentration slurry is solved.

In order to solve the problems, the following technical scheme is provided:

the utility model relates to a novel volumetric pump, including the pump body, the feed valve, the bleeder valve, piston cylinder and actuating mechanism, the upper end of the pump body is equipped with the import, its lower extreme is equipped with the export, the feed valve links to each other with the import, the bleeder valve links to each other with the export, the feed valve is used for the unidirectional feed and the ejection of compact of the pump body respectively with the bleeder valve, piston cylinder and this pump body inner chamber intercommunication for change the size of pump body inner chamber, when pump body inner chamber grow, the feed valve is opened, the slurry fills pump body inner chamber under the action of gravity, when pump body inner chamber grow smaller, the feed valve is closed, the slurry is pressed out from the bleeder valve, actuating mechanism is used for the drive the operation of piston cylinder.

By adopting the technical scheme: the pump body adopts an upper feeding and lower discharging mode, so that high-concentration and uneven slurry can smoothly flow from top to bottom according to a preset route, and the phenomenon of blockage caused by sedimentation is avoided, and the abnormal condition of equipment is avoided.

The feeding valve is cylindrical and obliquely arranged, the upper end of the feeding valve is a feeding port, one side of the lower part of the feeding valve is provided with a discharging port communicated with the inner cavity of the pump body, a feeding valve core is arranged between the feeding port and the discharging port, a feeding valve seat matched with the feeding valve core is connected in the feeding port, an executing mechanism is further arranged in the feeding valve, and the executing mechanism drives the feeding valve core to be in contact with or separate from the feeding valve seat so as to be communicated or cut off between the feeding port and the discharging port.

By adopting the technical scheme: when the feeding valve is controlled by the actuating mechanism to actively open, the slurry falls into the discharge port from the feed port under the condition of gravity, and then the actuating mechanism actively closes the feeding valve to stop feeding.

The actuating mechanism comprises a hydraulic cylinder, the hydraulic cylinder is arranged at one end of the feeding valve, which is far away from the feeding port, and one end of a hydraulic rod in the hydraulic cylinder is detachably and fixedly connected with the feeding valve core.

By adopting the technical scheme: the hydraulic cylinder is arranged as an actuating mechanism for driving the feeding valve core to operate, one end of a hydraulic rod of the hydraulic cylinder is detachably connected with the feeding valve core, and when the valve core is worn, the valve core can be replaced.

The feeding valve seat is in a shape of a hand wheel, an opening at the inner side of the feeding valve seat is a conical opening, and one end of the feeding valve core close to the feeding valve seat is in a conical shape corresponding to the opening at the inner side of the feeding valve seat; one end of the feeding valve core far away from the feeding valve seat is provided with a connecting column, a feeding back plate is fixed on the connecting column, a feeding sealing ring is arranged between the feeding back plate and the connecting column, and the feeding sealing ring partially extends out of the outer circular surface of the first valve face.

By adopting the technical scheme: the feeding valve core is matched with the feeding valve seat with the conical opening, the sealing ring is installed on the feeding valve core, meanwhile, the sealing ring is installed on the feeding valve core through the feeding back plate and the connecting column, the sealing ring is inflated after being compressed, the sealing ring is tightly attached to the feeding valve seat, sealing tightness is guaranteed, and after the sealing ring is worn, the sealing ring can be replaced by detaching the feeding back plate.

The connecting column is fixedly connected with one end, close to the hydraulic rod, of the connecting column through a jacket, the jacket comprises two half shells fixedly connected through bolts, at least one group of annular limiting grooves are formed in one end, close to the hydraulic rod, of the connecting column, at least one group of annular limiting protrusions corresponding to the limiting grooves of the connecting column and the hydraulic rod are formed in the inner walls of the two half shells, and when the two half shells are connected and the limiting protrusions are embedded into the corresponding limiting grooves, the connecting column and the hydraulic rod can be fixedly connected; the jacket is sleeved with a cylindrical spring, one end of the cylindrical spring is propped against the feeding backboard, the other end of the cylindrical spring is propped against the hydraulic cylinder, and the cylindrical spring is always in a state with reverse acting force; the center of the feeding valve seat is provided with a first guide hole, one end of the feeding valve core, which is close to the feeding valve seat, is provided with a guide pillar, and the guide pillar is in sliding fit with the first guide hole.

By adopting the technical scheme: the hydraulic rod is connected with the connecting column through a jacket formed by two half shells, and annular limiting grooves are also formed in the two half shells, and through the annular limiting protrusions respectively arranged on the hydraulic rod and the connecting column, the limiting grooves are connected with the limiting protrusions, so that the limiting of the hydraulic rod and the connecting column in the axial direction can be ensured, and the connection reliability of the hydraulic rod and the connecting column is ensured; in addition, the cylinder spring is sleeved on the connecting column and is always in a compressed state in the feeding valve, so that the hydraulic rod and the connecting column are guaranteed to be on the same axis, the feeding valve core can accurately reversely abut against the feeding valve seat, and the feeding valve core is further provided with a guide pillar in sliding fit with the first guide hole, so that the accuracy of displacement of the feeding valve core is further guaranteed.

The upper end of the discharging valve is connected with a discharging valve seat, the lower end of the discharging valve is connected with a spring seat, a discharging valve core is arranged between the discharging valve seat and the spring seat, one end of the discharging valve core is matched with the discharging valve seat, and the other end of the discharging valve core is propped against the spring seat through a reverse ejection spring; the discharging valve seat is in a shape of a hand wheel, an opening at the inner side of the discharging valve seat is a conical opening, one end of the discharging valve core close to the discharging valve seat is in a conical shape corresponding to the opening at the inner side of the discharging valve seat, a first guide rod which is in sliding fit with the guide hole is arranged at one end of the discharging valve core far away from the discharging valve seat, a discharging back plate is fixed on the first guide rod, a discharging sealing ring is connected between the discharging valve core and the discharging back plate, and part of the discharging sealing ring extends out of the outer circular surface of the first valve surface; the bottom end of the discharging backboard is provided with a limiting cylinder, and the lower end of the limiting cylinder is propped against the spring seat after descending along with the discharging valve core.

By adopting the technical scheme: the structure that the ejection of compact valve is similar to the check valve, anti-top spring is with ejection of compact case anti-butt on the opening of ejection of compact disk seat, and set up the sealing washer on ejection of compact case, can have more abundant contact with ejection of compact disk seat through the sealing washer, guarantee sealed effect, ejection of compact case adopts cone-shaped structure, form the effect of self-align with conical open-ended ejection of compact disk seat, the sealing washer is connected with first guide arm through ejection of compact backplate simultaneously and installs the sealing washer on ejection of compact case, the sealing washer adopts this kind of mode to bulge after compressing tightly, make sealing washer and feeding disk seat closely laminate, guarantee sealed tightness, and after the sealing washer wearing and tearing, the accessible is dismantled ejection of compact backplate and is changed the sealing washer, ejection of compact case bottom is equipped with spacing section of thick bamboo, spacing section of thick bamboo descends and offsets with the spring holder, be used for protecting anti-top spring, avoid the spring by excessive compression.

The spring seat is in a shape of a hand wheel with an upwards arched inner part, the top end of the spring seat is provided with a guide hole, the side surface of the arched part of the spring seat is provided with a plurality of guide holes for slurry to flow, the center of the discharge valve seat is provided with a second guide hole, and the upper end of the discharge valve core is provided with a second guide rod which is in sliding fit with the second guide hole.

By adopting the technical scheme: the spring holder is used for propping against the other end of the anti-top spring, and the spring holder is provided with a guide hole for slurry flow, and the second guide rod is matched with the guide hole on the spring holder to assist in providing stable guide of the valve core, so that the accuracy of valve core displacement is further improved, and the use effect is improved.

Be equipped with the diaphragm in the pump body, this diaphragm divides into two cavities with the internal appearance chamber of pump, and one of them cavity is the control chamber with the piston cylinder intercommunication, and another cavity is the circulation chamber with feed mechanism and discharge mechanism intercommunication, be equipped with the signal pole in the piston cylinder, the one end of this signal pole stretches into control chamber and diaphragm fixed connection, be provided with the monitoring mechanism that is used for judging signal pole running position in the piston cylinder.

By adopting the technical scheme: the pump body comprises two chambers, a control chamber and a circulation chamber, wherein the control chamber and the circulation chamber are respectively positioned at two sides of the diaphragm, the control chamber is connected with the hydraulic cylinder for controlling the diaphragm to reciprocate, the circulation chamber is used for pumping slurry, and the hydraulic cylinder is internally provided with a monitoring mechanism for accurately monitoring the position of the signal rod when the diaphragm moves, so that the deformation degree of the diaphragm can be identified, and the diaphragm is prevented from breaking.

The driving mechanism comprises a speed reducer motor and a crank case, wherein a crank shaft is arranged in the crank case, the shaft extension of the speed reducer motor is connected with the input end of the crank shaft through the transmission of the speed reducer, at least three crank throws are axially arranged on the crank shaft and are uniformly distributed on the periphery of the crank shaft, working cavities with the corresponding number of the crank throws are arranged in a piston cylinder, pistons are arranged in the working cavities, the crank throws are in transmission connection with the corresponding pistons through connecting rods, and when the crank shaft rotates, the crank throws pull the connecting rods to enable the pistons to do linear reciprocating motion.

By adopting the technical scheme: the crankshaft in the crankcase is provided with at least three groups of crank throws with evenly distributed phases, each crank throw is connected with a group of working cavities, so that each group of working cavities can work alternately, and when slurry is conveyed, each slurry conveying curve is overlapped to form a stable conveying curve, so that the fluctuation coefficient of slurry conveying is small, slurry can be conveyed stably, and the safety of a slurry conveying pipeline is ensured.

A pump cover is arranged on one side of the pump body, which is far away from the control cavity, the pump cover is fixedly connected with the pump body through bolts, and a sealing gasket is arranged between the pump body and the pump cover; the edge of diaphragm is equipped with round protruding muscle, pump body is located one side of control chamber and is the toper structure and offers the annular notch that is used for placing protruding muscle on its inboard conical surface, pump cover inboard is connected with annular pressure section of thick bamboo, pressure section of thick bamboo extrudees protruding muscle into annular notch, pressure section of thick bamboo is close to feed mechanism and discharge mechanism one side and all has offered circular breach, and thick liquid circulates between two breachs.

By adopting the technical scheme: the recess is packed into to diaphragm edge adoption and the integrative protruding muscle mode of diaphragm, presses protruding muscle into the recess through the pressure section of thick bamboo with pump cover an organic whole, because the diaphragm is soft rubber's material, has sealed function, therefore need not set up other seal structure, just can guarantee installation quality through diaphragm itself, can not intercommunication between control chamber and the circulation chamber, also makes the structure become simple, also easily change when the diaphragm is damaged.

By adopting the scheme, the method has the following advantages:

1. in the application, the pump body adopts an upper feeding and lower discharging mode, so that high-concentration and uneven slurry can smoothly flow from top to bottom according to a preset route, and the blockage caused by sedimentation can not occur, thereby avoiding the abnormal condition of equipment.

2. In the application, at least three groups of crank throws with evenly distributed phases are arranged on a crankshaft in a crankcase, each crank throw is connected with one group of working cavities, so that each group of working cavities can alternately work, and when slurry is conveyed, each slurry conveying curve is overlapped to form a stable conveying curve, so that the fluctuation coefficient of slurry conveying is small, slurry can be conveyed stably, and the safety of a slurry conveying pipeline is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present application;

FIG. 2 is a partial cross-sectional top view of the crankcase and hydraulic cylinder of the application;

FIG. 3 is a schematic cross-sectional view of the pump body of the present application;

FIG. 4 is an enlarged schematic view of the structure shown at A in FIG. 3;

FIG. 5 is a schematic cross-sectional view of a feed valve of the present application;

FIG. 6 is a schematic cross-sectional view of a discharge valve of the present application;

FIG. 7 is a schematic view of a spring seat according to the present application;

fig. 8 is a schematic structural view of a signal rod in the present application.

Reference numerals illustrate: 1. a speed reducer motor; 2. a crankcase; 201. a crankshaft; 202. a bell crank; 3. a piston cylinder; 301. a piston; 302. a connecting rod; 303. a magnetic inductor; 4. a pump body; 401. a feed valve; 4011. a feed spool; 4012. a feeding sealing ring; 4013. a feed back plate; 4014. a jacket; 40111. a connecting column; 40112. a guide post; 4015. a cylindrical spring; 4016. a hydraulic cylinder; 4017. a hydraulic rod; 4018. a feed valve seat; 402. a discharge valve; 4021. a discharge valve seat; 4022. a spring seat; 40221. a guide hole; 40222. a deflector aperture; 4023. a discharging valve core; 40231. a first guide bar; 40232. a second guide bar; 4024. discharging sealing rings; 4025. a discharging backboard; 4026. a limiting cylinder; 4027. a counter top spring; 403. a diaphragm; 4031. convex ribs; 404. a pump cover; 4041. pressing a cylinder; 4042. a notch; 5. a signal bar; 501. a first connecting rod; 5011. a threaded column; 5012. a support column; 5013. a spigot; 502. a second connecting rod; 5021. a first groove; 5022. a second groove; 5023. a thread groove; 503. a pin; 504. a magnetic core; 505. and a buffer member.

Detailed Description

The application is described below with reference to figures 1-8 and examples.

As shown in fig. 1 and 2, the novel volumetric pump comprises a pump body 4, a feed valve 401, a discharge valve 402, a piston cylinder 3 and a driving mechanism, wherein the upper end of the pump body 4 is provided with an inlet, the lower end of the pump body is provided with an outlet, the feed valve 401 is connected with the inlet, the discharge valve 402 is connected with the outlet, the feed valve 401 and the discharge valve 402 are respectively used for unidirectional feeding and discharging of the pump body 4, the piston cylinder 3 is communicated with the inner cavity of the pump body 4 and used for changing the size of the inner cavity of the pump body 4, when the inner cavity of the pump body 4 is enlarged, the feed valve 401 is opened, slurry is filled into the inner cavity of the pump body 4 under the action of gravity, when the inner cavity of the pump body 4 is reduced, the feed valve 401 is closed, the slurry is pressed out from the discharge valve 402, and the driving mechanism is used for driving the piston cylinder 3 to operate; because the traditional mechanical diaphragm 403 pump feeding and discharging needs pumping or large-height feeding, the mechanical diaphragm 403 pump feeding and discharging device is only suitable for pressurizing the slurry with the weight concentration of less than 65%, according to the slurry flow characteristics, the lower end of the diaphragm 403 pump is fed and the upper end of the diaphragm 403 pump is discharged, when the slurry with high concentration and uneven concentration is conveyed, the diaphragm 403 is easy to be deposited and blocked below the pump body 4, the slurry can not be discharged, and the diaphragm 403 is easy to be broken; in the embodiment, the pump body 4 adopts an upper feeding and lower discharging mode, so that high-concentration and uneven slurry can smoothly flow from top to bottom according to a preset line, and blockage caused by sedimentation is avoided, and abnormal conditions of equipment are avoided.

The driving mechanism comprises a speed reducer motor 1 and a crank case 2, wherein a crank shaft 201 is arranged in the crank case 2, the shaft extension of the speed reducer motor 1 is in transmission connection with the input end of the crank shaft 201 through the speed reducer, at least three crank throws 202 are arranged on the crank shaft 201 along the axial direction, the crank throws 202 are uniformly distributed on the circumferential direction of the crank shaft 201, working cavities with the corresponding number of the crank throws 202 are arranged in a piston cylinder 3, pistons 301 are arranged in the working cavities, the crank throws 202 are in transmission connection with the corresponding pistons 301 through connecting rods 302, and when the crank shaft 201 rotates, the crank throws 202 pull the connecting rods 302 to enable the pistons 301 to do linear reciprocating motion. The traditional filling industrial pump takes a hydraulic oil pump as power, the energy loss of the hydraulic system is large, the whole operation efficiency is low, double cylinders work alternately, the fluctuation of the conveying slurry is large, the damage to a conveying pipeline is large, and especially when the pipeline is conveyed for a long distance, safety and environmental protection accidents are easy to occur, the control system of the filling industrial pump is mainly a hydraulic system, the failure rate of the hydraulic system is high, the failure maintenance difficulty is large, and metal-to-metal friction and sealing are carried out between a main flow S-shaped swing valve and a spectacle plate, so that the service life is about 400 hours, and the service life is short. In this embodiment, three groups of crank throws 202 and working chambers are provided, the crank throws 202 and the corresponding pistons 301 are in transmission connection through connecting rods 302, the phase difference of the crank throws 202 on the crankshaft 201 is 120 degrees, when slurry is conveyed, the three groups of piston cylinders 3 can work alternately, and stable conveying curves are formed after the three groups of slurry conveying curves are overlapped, so that the fluctuation coefficient of slurry conveying is small, the theoretical fluctuation coefficient is less than 10%, slurry can be conveyed stably, and the safety of a slurry conveying pipeline is ensured.

As shown in fig. 3 and 5, the feed valve 401 is in a cylindrical shape and is obliquely arranged, the upper end of the feed valve 401 is a feed inlet, one side of the lower part of the feed valve 401 is provided with a discharge port communicated with an inner cavity of the pump body 4, a feed valve core 4011 is arranged between the feed inlet and the discharge port, a feed valve seat 4018 matched with the feed valve core 4011 is connected in the feed inlet, an actuator is further arranged in the feed valve 401, the actuator drives the feed valve core 4011 to be contacted with or separated from the feed valve seat 4018 so as to be communicated or cut off between the feed inlet and the discharge port, the actuator comprises a hydraulic cylinder 4016, the hydraulic cylinder 4016 is arranged on one end, far away from the feed inlet, of the feed valve 401, one end of a hydraulic rod 4017 in the hydraulic cylinder 4016 is detachably and fixedly connected with the feed valve core 4011, the feed valve seat 4018 is in a hand wheel shape, an opening at the inner side of the feed valve seat 4018 is in a conical shape, and one end of the feed valve core 4011 near the feed valve seat 4018 is in a conical shape matched with the opening at the inner side of the feed valve seat 4018; one end of the feed valve core 4011 far away from the feed valve seat 4018 is provided with a connecting column 40111, a feed backboard 4013 is fixed on the connecting column 40111, a feed sealing ring 4012 is arranged between the feed backboard 4013 and the connecting column 40111, and part of the feed sealing ring 4012 extends out of the outer circular surface of the first valve surface.

During feeding, slurry enters the feeding valve core 4011 from a feeding hole and enters the pump body 4 from a discharging hole, the feeding valve 401 is controlled by the actuating mechanism to be actively opened, so that the slurry falls into the discharging hole from the feeding hole under the condition of gravity, the actuating mechanism is used for actively closing the feeding valve 401 to stop feeding, the hydraulic cylinder 4016 is used as the actuating mechanism for driving the feeding valve core 4011 to operate, one end of a hydraulic rod 4017 of the hydraulic cylinder 4016 is detachably connected with the feeding valve core 4011, after the valve core is worn, the valve core can be replaced, the conical feeding valve core 4011 is matched with a feeding valve seat 4018 with a conical opening, a sealing ring is mounted on the feeding valve core 4011, and meanwhile the sealing ring is mounted on the feeding valve core 4011 through the connection of a feeding back plate 4013 and a connecting column 40111.

Further, one end, close to the connecting column 40111 and the hydraulic rod 4017, is fixedly connected through a jacket 4014, the jacket 4014 comprises two half shells fixedly connected through bolts, one end, close to the connecting column 40111 and the hydraulic rod 4017, is at least provided with a group of annular limiting grooves, at least one group of annular limiting protrusions corresponding to the limiting grooves of the connecting column 40111 and the hydraulic rod 4017 are arranged on the inner walls of the two half shells, and when the two half shells are connected and the limiting protrusions are embedded into the corresponding limiting grooves, the connecting column 40111 and the hydraulic rod 4017 can be fixedly connected; the jacket 4014 is sleeved with a cylindrical spring 4015, one end of the cylindrical spring 4015 is propped against the feeding backboard 4013, the other end of the cylindrical spring 4015 is propped against the hydraulic cylinder 4016, and the cylindrical spring 4015 is always in a state with reverse acting force; the guide hole is further formed in the scheme to provide positioning for the feeding valve core 4011, a first guide hole is formed in the center of the feeding valve seat 4018, a guide pillar 40112 is arranged at one end of the feeding valve core 4011 close to the feeding valve seat 4018, the guide pillar 40112 is in sliding fit with the first guide hole, the contact positions of the valve core and the feeding valve seat 4018 are accurate each time, leakage caused by deviation cannot occur, and stability of the device is improved. In the embodiment, the hydraulic rod 4017 is connected with the connecting column 40111 through a jacket 4014 formed by two half shells, and annular limiting grooves are further formed in the two half shells, and through the annular limiting protrusions respectively arranged on the hydraulic rod 4017 and the connecting column 40111, the limiting grooves are connected with the limiting protrusions, so that the limiting of the hydraulic rod 4017 and the connecting column 40111 in the axial direction can be ensured, and the connection reliability of the hydraulic rod 4017 and the connecting column 40111 is ensured; in addition, a cylindrical spring 4015 is sleeved on the connecting column 40111, the cylindrical spring 4015 is always in a compressed state in the feed valve 401, and the fact that the hydraulic rod 4017 and the connecting column 40111 are on the same axis is guaranteed, so that the feed valve core 4011 can accurately reversely abut against the feed valve seat 4018, and the feed valve core 4011 is further provided with a guide pillar 40112 in sliding fit with the first guide hole, and the accuracy of displacement of the feed valve core 4011 is further guaranteed.

As shown in fig. 3, 6 and 7, a discharge valve 402 is in a cylinder shape, the upper end of the discharge valve 402 is connected with a discharge valve seat 4021, the lower end of the discharge valve 402 is connected with a spring seat 4022, a discharge valve core 4023 is arranged between the discharge valve seat 4021 and the spring seat 4022, one end of the discharge valve core 4023 is matched with the discharge valve seat 4021, and the other end of the discharge valve core is propped against the spring seat 4022 through a reverse ejection spring 4027; the discharging valve seat 4021 is in a hand wheel shape, an opening at the inner side of the discharging valve seat 4021 is a conical opening, one end of a discharging valve core 4023 close to the discharging valve seat 4021 is in a conical shape which is matched with the opening at the inner side of the discharging valve seat 4021, a first guide rod 40231 which is in sliding fit with a guide hole 40221 is arranged at one end of the discharging valve core 4023 far away from the discharging valve seat 4021, a discharging backboard 4025 is fixed on the first guide rod 40231, a discharging sealing ring 4024 is connected between the discharging valve core 4023 and the discharging backboard 4025, and part of the discharging sealing ring 4024 extends out of the outer circular surface of the first valve surface; the bottom of the discharging backboard 4025 is provided with a limiting cylinder 4026, and the lower end of the limiting cylinder 4026 is propped against the spring seat 4022 after descending along with the discharging valve core 4023. The structure of the discharge valve 402 is similar to that of a one-way valve, a counter-top spring 4027 is used for propping a discharge valve core 4023 against an opening of a discharge valve seat 4021, a sealing ring is arranged on the discharge valve core 4023, the discharge valve core 4023 can be in full contact with the discharge valve seat 4021 through the sealing ring, the sealing effect is guaranteed, the discharge valve core 4023 adopts a cone-shaped structure and forms a self-positioning effect with the cone-shaped opening discharge valve seat 4021, meanwhile, the sealing ring is connected with a first guide rod 40231 through a discharge backboard 4025 to install the sealing ring on the discharge valve core 4023, the sealing ring is inflated after being compressed in the mode, the sealing ring is tightly attached to a feed valve seat 4018, sealing tightness is guaranteed, and after the sealing ring is worn, the sealing ring can be replaced through the removal of the discharge backboard 4025, a limiting cylinder 4026 is arranged at the bottom of the discharge valve core 4023 and is propped against a spring seat 4022, so that the counter-top spring 4027 is protected, and the spring is prevented from being excessively compressed.

Further, the spring seat 4022 is in a shape of a hand wheel with an upwardly arched inner part, a guide hole 40221 is formed in the top end of the spring seat 4022, a plurality of guide holes 40222 for slurry to flow are formed in the side surface of the arched part of the spring seat 4022, a second guide hole is formed in the center of the discharge valve seat 4021, a second guide rod 40232 is arranged at the upper end of the discharge valve core 4023, and the second guide rod 40232 is in sliding fit with the second guide hole. The spring seat 4022 is used for propping against the other end of the anti-propping spring 4027, and the spring seat 4022 is provided with a guide hole 40222 for slurry to flow, and the second guide rod 40232 is matched with the guide hole 40221 on the spring seat 4022 to assist in providing stable guide for the valve core, so that the accuracy of valve core displacement is further improved, and the use effect is improved.

A pump cover 404 is arranged on one side of the pump body 4 away from the control cavity, the pump cover 404 is fixedly connected with the pump body 4 through bolts, and a sealing gasket is also arranged between the pump body 4 and the pump cover 404; the edge of the diaphragm 403 is provided with a circle of convex ribs 4031, one side of the pump body 4 body, which is positioned on the control cavity, is in a conical structure, an annular notch for placing the convex ribs 4031 is formed in the conical surface on the inner side of the pump body 4 body, an annular pressing cylinder 4041 is connected to the inner side of the pump cover 404, the pressing cylinder 4041 presses the convex ribs 4031 into the annular notch, round notches 4042 are formed in one side, close to the feeding mechanism and the discharging mechanism, of the pressing cylinder 4041, and slurry circulates between the two notches 4042. The diaphragm 403 edge adopts the mode of the protruding muscle 4031 with diaphragm 403 an organic whole to pack into the notch, presses protruding muscle 4031 into the notch through the pressure section of thick bamboo 4041 with pump cover 404 an organic whole, because diaphragm 403 is soft rubber's material, has sealed function, therefore need not set up other seal structure, just can guarantee installation quality through diaphragm 403 itself, can not communicate between control chamber and the circulation chamber, also makes the structure become simple, also easily change when diaphragm 403 is damaged.

As shown in fig. 3, a diaphragm 403 is disposed in the pump body 4, the diaphragm 403 divides a cavity in the pump body 4 into two chambers, one of the two chambers is a control chamber communicated with the piston cylinder 3, the other chamber is a flow chamber communicated with the feeding mechanism and the discharging mechanism, a signal rod 5 is disposed in the piston cylinder 3, one end of the signal rod 5 extends into the control chamber and is fixedly connected with the diaphragm 403, and a monitoring mechanism for judging the running position of the signal rod 5 is disposed in the piston cylinder 3. The pump body 4 comprises two chambers, a control chamber and a circulation chamber, wherein the control chamber and the circulation chamber are respectively positioned on two sides of the diaphragm 403, the control chamber is connected with the hydraulic cylinder 4016 for controlling the diaphragm 403 to reciprocate, the circulation chamber is used for pumping slurry, and when the diaphragm 403 moves, the hydraulic cylinder 4016 is internally provided with a monitoring mechanism for accurately monitoring the position of the signal rod 5, so that the deformation degree of the diaphragm 403 can be identified, and the diaphragm 403 is prevented from being broken.

Further, as shown in fig. 3, 4 and 8, the monitoring mechanism includes a magnetic core 504 mounted on the signal rod 5 and a magnetic sensor 303 mounted on the inner wall of the hydraulic cylinder 4016, and the magnetic sensor 303 is configured to receive a position signal sent by the magnetic core 504; the signal rod 5 comprises a first connecting rod 501 and a second connecting rod 502, one end of the first connecting rod 501 is connected with a diaphragm 403, the other end of the first connecting rod is connected with a supporting column 5012, a magnetic core 504 is sleeved on the supporting column 5012, one end of the supporting column 5012 is in threaded connection with the second connecting rod 502, as the magnetic core 504 is easy to be fragile, a second groove 5022 for inserting the supporting column 5012 is formed in one end of the second connecting rod 502, which is close to the first connecting rod 501, a circle of first groove 5021 for accommodating the magnetic core 504 is formed in one side of the second groove 5022 in an expanding mode, in order to realize the fixed connection of the first connecting rod 501 and the second connecting rod 502, a threaded groove 5023 is formed in one side, which is far away from the first groove 5021, of the second groove 5022 is connected with a threaded column 5011 connected with the threaded groove 5023; the magnetic core 504 both sides are equipped with bolster 505, tang 5013 has been seted up to the one end of head rod 501, the notch of first recess 5021 compresses tightly magnetic core 504 with both sides bolster 505 behind tang 5013 lock, magnetic core 504 is placed in the region that forms by first recess 5021 like this, support column 5012 and tang 5013, and set up bolster 505 in the both sides of magnetic core 504, just can absorb the shock between head rod 501 and the head rod 502 through bolster 505, the impact to magnetic core 504 has greatly reduced like this, reduce the possibility of magnetic core 504 brittle fracture, and the structure of this scheme easily dismantles the installation to magnetic core 504, excellent in use effect.

Further, in this embodiment, the buffer member 505 is a rubber gasket, the rubber gasket is located in the first groove 5021 in an annular shape and is sleeved on the supporting column 5012, and the rubber gasket is provided with two groups and located at two sides of the magnetic core 504, the buffer member 505 is damped by the rubber gasket, the rubber gasket is provided with two groups and located at two sides of the magnetic core 504 respectively, after the first connecting rod 501 and the second connecting rod 502 are connected, the magnetic core 504 is tightly wrapped by the rubber gasket at two sides of the magnetic core 504, so that good damping and buffering protection are provided, and thus the brittle fracture accident of the magnetic core 504 can be greatly reduced.

Further, the first connecting rod 501 is connected with the threaded column 5011, the second connecting rod 502 is provided with the threaded groove 5023, the second connecting rod 502 is inserted with the pin 503 at the joint of the threaded groove 5023 and the threaded column 5011, the pin 503 does not expose the surface of the second connecting rod 502, after the arrangement, the radial displacement between the first connecting rod 501 and the second connecting rod 502 is limited by the pin 503, the vibration to the magnetic core 504 is further reduced, and the impact is reduced.

While the application has been described in conjunction with specific embodiments, it will be apparent to those skilled in the art that these descriptions are intended to be illustrative, and not limiting, of the scope of the application, and that various changes and modifications may be made by those skilled in the art in light of the spirit and principles of the application, which are also within the scope of the application.

Claims

1. The utility model provides a novel volumetric pump, its characterized in that, including pump body (4), feed valve (401), bleeder valve (402), piston cylinder (3) and actuating mechanism, the upper end of pump body (4) is equipped with the import, its lower extreme is equipped with the export, feed valve (401) link to each other with the import, bleeder valve (402) link to each other with the export, feed valve (401) are used for the unidirectional feed and the ejection of compact of pump body (4) respectively with bleeder valve (402), piston cylinder (3) and this pump body (4) inner chamber intercommunication for change the size of pump body (4) inner chamber, become big when pump body (4) inner chamber, feed valve (401) are opened, the slurry fills pump body (4) inner chamber under the effect of gravity, become small when pump body (4) inner chamber, feed valve (401) are closed, the slurry is pressed out from bleeder valve (402), actuating mechanism is used for the drive piston cylinder (3) function.

2. The novel volumetric pump as claimed in claim 1, wherein the feed valve (401) is cylindrical and is arranged in an inclined manner, the upper end of the feed valve (401) is a feed inlet, one side of the lower part of the feed valve (401) is provided with a discharge outlet communicated with the inner cavity of the pump body (4), a feed valve core (4011) is arranged between the feed inlet and the discharge outlet, a feed valve seat (4018) matched with the feed valve core (4011) is connected in the feed inlet, and an actuating mechanism is further arranged in the feed valve (401) and drives the feed valve core (4011) to contact with or separate from the feed valve seat (4018) so as to be communicated with or cut off between the feed inlet and the discharge outlet.

3. The novel volumetric pump as claimed in claim 2, wherein the actuator comprises a hydraulic cylinder (4016), the hydraulic cylinder (4016) is mounted on the feed valve (401) at an end far away from the feed inlet, and one end of a hydraulic rod (4017) in the hydraulic cylinder (4016) is detachably and fixedly connected with the feed spool (4011).

4. A novel volumetric pump as claimed in claim 3, characterized in that the feed valve seat (4018) is in the shape of a hand wheel, the opening inside the feed valve seat (4018) is a conical opening, and one end of the feed valve core (4011) close to the feed valve seat (4018) is in the shape of a cone adapted to the opening inside the feed valve seat (4018); one end of a feeding valve core (4011) far away from a feeding valve seat (4018) is provided with a connecting column (40111), a feeding backboard (4013) is fixed on the connecting column (40111), a feeding sealing ring (4012) is arranged between the feeding backboard (4013) and the connecting column (40111), and the feeding sealing ring (4012) partially extends out of the outer circular surface of the first valve face.

5. The novel positive-displacement pump according to claim 4, wherein one end of the connecting column (40111) and one end of the hydraulic rod (4017) close to each other are fixedly connected through a jacket (4014), the jacket (4014) comprises two half shells fixedly connected through bolts, one end of the connecting column (40111) and one end of the hydraulic rod (4017) close to each other are at least provided with a group of annular limiting grooves, the inner walls of the two half shells are at least provided with a group of annular limiting protrusions corresponding to the limiting grooves of the connecting column (40111) and the hydraulic rod (4017), and when the two half shells are connected and the limiting protrusions are embedded into the corresponding limiting grooves, the connecting column (40111) and the hydraulic rod (4017) can be fixedly connected; a cylindrical spring (4015) is sleeved outside the jacket (4014), one end of the cylindrical spring (4015) is propped against the feeding backboard (4013), the other end of the cylindrical spring is propped against the hydraulic cylinder (4016), and the cylindrical spring (4015) is always in a state with reverse acting force; the center of the feeding valve seat (4018) is provided with a first guide hole, one end of the feeding valve core (4011) close to the feeding valve seat (4018) is provided with a guide pillar (40112), and the guide pillar (40112) is in sliding fit with the first guide hole.

6. The novel volumetric pump as claimed in claim 1, wherein the discharge valve (402) is cylindrical, the upper end of the discharge valve is connected with a discharge valve seat (4021), the lower end of the discharge valve is connected with a spring seat (4022), a discharge valve core (4023) is arranged between the discharge valve seat (4021) and the spring seat (4022), one end of the discharge valve core (4023) is matched with the discharge valve seat (4021), and the other end of the discharge valve core is propped against the spring seat (4022) through a counter-top spring (4027); the discharging valve seat (4021) is in a hand wheel shape, an opening at the inner side of the discharging valve seat (4021) is a conical opening, one end of a discharging valve core (4023) close to the discharging valve seat (4021) is in a conical shape which is matched with the opening at the inner side of the discharging valve seat (4021), one end of the discharging valve core (4023) far away from the discharging valve seat (4021) is provided with a first guide rod (40231) which is in sliding fit with a guide hole (40221), a discharging backboard (4025) is fixed on the first guide rod (40231), a discharging sealing ring (4024) is connected between the discharging valve core (4023) and the discharging backboard (4025), and the discharging sealing ring (4024) partially extends out of the outer circular surface of the first valve surface; the bottom of the discharging backboard (4025) is provided with a limiting cylinder (4026), and the lower end of the limiting cylinder (4026) is propped against the spring seat (4022) after descending along with the discharging valve core (4023).

7. The novel volumetric pump as set forth in claim 6, wherein the spring seat (4022) is in the shape of a hand wheel with an upwardly arched interior, a guide hole (40221) is provided at the top end of the spring seat (4022), a plurality of guide holes (40222) for slurry to flow are provided at the side surface of the arched portion of the spring seat (4022), a second guide hole is provided at the center of the discharge valve seat (4021), a second guide rod (40232) is provided at the upper end of the discharge valve core (4023), and the second guide rod (40232) is slidably engaged with the second guide hole.

8. A novel volumetric pump as claimed in any one of claims 1-7, characterized in that a diaphragm (403) is arranged in the pump body (4), the diaphragm (403) divides the cavity in the pump body (4) into two chambers, one chamber is a control chamber communicated with the piston cylinder (3), the other chamber is a circulation chamber communicated with the feeding mechanism and the discharging mechanism, a signal rod (5) is arranged in the piston cylinder (3), one end of the signal rod (5) extends into the control chamber and is fixedly connected with the diaphragm (403), and a monitoring mechanism for judging the running position of the signal rod (5) is arranged in the piston cylinder (3).

9. A novel volumetric pump as claimed in claim 1, characterized in that the driving mechanism comprises a speed reducer motor (1) and a crank case (2), wherein the crank case (2) is provided with a crank shaft (201), the shaft extension of the speed reducer motor (1) is connected with the input end of the crank shaft (201) through a speed reducer in a transmission manner, the crank shaft (201) is provided with at least three crank throws (202) along the axial direction, the crank throws (202) are uniformly distributed in the circumferential direction of the crank shaft (201), the piston cylinder (3) is internally provided with working cavities with the corresponding number of the crank throws (202), the working cavities are internally provided with pistons (301), the crank throws (202) are in transmission connection with the corresponding pistons (301) through connecting rods (302), and when the crank shaft (201) rotates, the crank throws (202) pull the connecting rods (302) to enable the pistons (301) to do linear reciprocating motion.

10. The novel volumetric pump as claimed in claim 8, wherein a pump cover (404) is provided on a side of the pump body (4) away from the control chamber, the pump cover (404) is fixedly connected with the pump body (4) by bolts, and a sealing gasket is further installed between the pump body (4) and the pump cover (404); the edge of diaphragm (403) is equipped with round protruding muscle (4031), pump body (4) body is the toper structure in one side of control chamber and has seted up the annular notch that is used for placing protruding muscle (4031) on its inboard conical surface, pump cover (404) inboard is connected with annular pressure section of thick bamboo (4041), pressure section of thick bamboo (4041) is with protruding muscle (4031) extrusion income annular notch in, pressure section of thick bamboo (4041) are close to feed mechanism and discharge mechanism one side and all have seted up circular breach (4042), and thick liquid circulates between two breach (4042).