Plunger pump adopting cylindrical diaphragm device and working principle of plunger pump

Abstract

According to the plunger pump adopting the barrel-type diaphragm device and the working principle of the plunger pump, a connecting pipe is arranged on the side face of a barrel of the barrel-type diaphragm device and connected with a pump body; a cylindrical grid with a cavity is arranged on the inner side of the cylinder body, and the diaphragm is placed in the middle of the cylinder body; the upper flange and the lower flange are respectively fixed at the upper end and the lower end of the cylinder and clamp the fixing ring of the diaphragm; an inlet of the discharging one-way valve is connected with the material hole of the upper flange; an outlet of the feeding one-way valve is connected with the material hole of the lower flange; during material suction, the plunger retreats, a medium outside the diaphragm enters the pump body through the connecting pipe under the action of air pressure, the elastic section of the diaphragm expands, and materials enter the inner side of the diaphragm through the feeding one-way valve; during discharging, the plunger is propelled, a medium in the pump body enters the barrel through the connecting pipe, the elastic section of the diaphragm is compressed, and materials on the inner side of the diaphragm are discharged through the discharging one-way valve; materials are isolated from the pump body through the arranged barrel type diaphragm device, the reliability is improved, the site is clean and tidy, and vibration during operation can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps and relates to a plunger pump adopting a cylindrical diaphragm device and a working principle thereof. Background Art

[0002] A plunger pump is a tool that uses a hydraulic cylinder to drive the plunger to reciprocate to pump materials such as mud and sewage. It has two types: vertical and horizontal. The plunger pump drives the plunger to reciprocate through the hydraulic cylinder; when the plunger retreats, the feed check valve opens, the discharge check valve closes, and the material enters the pump body; when the plunger advances, the feed check valve closes, the discharge check valve opens, and the material is pressed out of the pump body.

[0003] In existing plunger pumps, materials flow in the pump body as the plunger moves back and forth. Some materials have high temperatures, which can cause aging of the plunger seal. Some materials contain particles, which flow as the plunger moves back and forth, and can wear out the plunger seal. These factors can reduce the service life of the seal, causing rapid damage to the seal and material leakage. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the above-mentioned background technology and to provide a plunger pump using a cylindrical diaphragm device.

[0005] The cylindrical diaphragm device comprises: a cylindrical body, a grille, an upper flange, a lower flange, a diaphragm, and a connecting pipe; The middle of the cylinder is a cylindrical straight section, an upper flange is arranged on the top of the straight section, a lower flange is arranged on the bottom of the straight section, bolt holes are arranged on the upper flange and the lower flange, a connecting pipe is arranged on the side of the cylinder, and the connecting pipe is connected to the pump body; a cylindrical grid with a hole is arranged inside the cylinder; The middle of the diaphragm is a cylindrical elastic section, and fixing rings are respectively arranged at the upper and lower ends, and the diaphragm is placed in the middle of the cylinder; The upper flange has the same size as the upper flange of the cylinder, and a material hole is set in the middle of the upper flange; the lower flange has the same size as the lower flange of the cylinder, and a material hole is set in the middle of the lower flange; bolts are passed through the bolt holes of the upper flange and the upper flange of the cylinder to fix the upper flange and the cylinder and clamp the fixing ring of the diaphragm; bolts are passed through the bolt holes of the lower flange and the lower flange of the cylinder to fix the lower flange and the cylinder and clamp the fixing ring of the diaphragm; The inlet of the discharge check valve is connected to the material hole of the upper flange, and the outlet of the feed check valve is connected to the material hole of the lower flange.

[0006] Preferably, a water injection valve is provided on the connecting pipe, and an exhaust valve is provided on the upper side of the cylinder body, and fluid medium is injected into the water injection valve while air in the cylinder body is exhausted through the exhaust valve.

[0007] The working principle of the plunger pump using a cylindrical diaphragm device in the present invention is as follows: 1) Suction: The plunger moves back, and under the action of air pressure, the medium outside the diaphragm enters the pump body through the connecting pipe, the elastic section of the diaphragm expands, the discharge check valve closes, and the material enters the inside of the diaphragm through the feed check valve; 2) Discharging: The plunger pushes forward, the medium in the pump body enters the cylinder through the connecting pipe, the elastic section of the diaphragm is compressed, the feed check valve is closed, and the material inside the diaphragm is discharged from the discharge check valve.

[0008] One embodiment of the present disclosure is a vertical structure plunger pump, which has two vertically mounted pump bodies, material holes are symmetrically arranged at the bottom side of the pump body, two sleeve-type diaphragm devices are arranged in parallel, the connecting pipes of the cylindrical diaphragm devices are connected to the pump body, the inlets of two sets of feed check valves are connected, and a common feed port is arranged; the outlets of two sets of discharge check valves are connected, and a common discharge port is arranged; when one plunger is pressed down, the diaphragm of the corresponding cylindrical diaphragm device is compressed and pumps out the material, while the other plunger rises, the diaphragm of the corresponding cylindrical diaphragm device expands and inhales the material.

[0009] Another embodiment of the present disclosure is a horizontal structure plunger pump, which has two horizontally installed pump bodies, material holes are respectively arranged at both ends of the pump body, and two sleeve-type diaphragm devices are arranged in parallel. The connecting pipes of the cylindrical diaphragm devices are connected to the pump body, the inlets of two sets of feed check valves are connected, and a common feed port is arranged; the outlets of two sets of discharge check valves are connected, and a common discharge port is arranged; the plunger moves to one end, and the diaphragm of the cylindrical diaphragm device at the corresponding end compresses and presses out the material, while the diaphragm of the cylindrical diaphragm device at the other end of the pump body expands and inhales the material.

[0010] The present invention adopts a plunger pump with a cylindrical diaphragm device and its working principle. The material is isolated from the pump body by the cylindrical diaphragm device. The elastic section of the diaphragm is restricted by the grid when expanding. Firstly, the force is evenly applied during expansion and the service life is long. Secondly, the connecting pipe on the cylinder will not be blocked. There is no dynamic seal at the part where the material contacts. The plunger pump has good sealing performance, which improves reliability, keeps the site clean and tidy, and can also reduce vibration during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the cylindrical diaphragm device described in the present invention.

[0012] Figure 2 It is a cross-sectional view of the diaphragm in the cylindrical diaphragm device described in the present invention.

[0013] Figure 3 It is a cross-sectional view of the barrel portion of the barrel-type diaphragm device of the present invention.

[0014] Figure 4 It is a schematic diagram of the cylindrical diaphragm device of the present invention in the material suction state.

[0015] Figure 5 It is a schematic diagram of the cylindrical diaphragm device of the present invention in the discharging state.

[0016] Figure 6 This is a front view of a first embodiment of a plunger pump using a cylindrical diaphragm device according to the present invention.

[0017] Figure 7 It is a top view of the first embodiment of the plunger pump using a cylindrical diaphragm device of the present invention.

[0018] Figure 8 It is a top view of the second embodiment of the plunger pump using a cylindrical diaphragm device of the present invention.

[0019] In the figure: 1. cylindrical diaphragm device; 11. cylinder; 111. upper flange; 112. lower flange; 12. upper flange; 13. lower flange; 14. grille; 15. diaphragm; 151. elastic section; 152. fixing ring; 16. connecting pipe; 2. feed check valve; 3. discharge check valve; 4. water injection valve; 5. exhaust valve; 6. pump body. Implementation

[0020] The technical solutions in the embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the cylindrical diaphragm device 1 comprises: a cylinder 11, a grille 14, an upper flange 12, a lower flange 13, a diaphragm 15, and a connecting pipe 16; the cylinder 11 is provided with a cylindrical straight section 111 in the middle, an upper flange 112 is provided at the top of the straight section 111, a lower flange 112 is provided at the bottom of the straight section 111, bolt holes are provided at the upper flange 111 and the lower flange 112, and a connecting pipe 16 is provided on the side of the cylinder 11; a cylindrical grille 14 with a hole is provided on the inner side of the cylinder 11; the diaphragm 15 is provided with a cylindrical elastic section 151 in the middle, fixing rings 152 are provided at the upper and lower ends respectively, and the diaphragm 15 is placed in the middle of the cylinder 11; the upper flange 12 is connected to the cylinder The upper flange 111 of the cylinder 11 has the same size, and a material hole is set in the middle of the upper flange 12; the lower flange 13 has the same size as the lower flange 112 of the cylinder 11, and a material hole is set in the middle of the lower flange 13; bolts are used to pass through the bolt holes of the upper flange 12 and the upper flange 111 of the cylinder 11 to fix the upper flange 111 and the cylinder 11 and clamp the fixing ring 152 of the diaphragm 15; bolts are used to pass through the bolt holes of the lower flange 13 and the lower flange 112 of the cylinder 11 to fix the lower flange 13 and the cylinder 11 and clamp the fixing ring 152 of the diaphragm 15; the inlet of the discharge check valve 3 is connected to the material hole of the upper flange 12, and the outlet of the feed check valve 2 is connected to the material hole of the lower flange 13.

[0022] like Figure 1 A water injection valve 4 is provided on the connecting pipe 16 , and an exhaust valve 5 is provided on the upper side of the cylinder 11 . Fluid medium is injected into the water injection valve 4 , and air in the cylinder 11 is discharged through the exhaust valve 5 at the same time.

[0023] The working principle of the plunger pump using a cylindrical diaphragm device in the present invention is as follows: like Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, when the plunger pump using a cylindrical diaphragm device is in the suction state, the plunger retreats, and under the action of air pressure, the medium outside the diaphragm 15 enters the pump body 6 through the connecting pipe 16, the elastic section 151 of the diaphragm 15 expands, the discharge check valve 3 is closed, and the material enters the inside of the diaphragm 15 through the feed check valve 2; when the plunger pump using a cylindrical diaphragm device is in the discharge state, the plunger advances, the medium in the pump body 6 enters the cylinder 11 through the connecting pipe 16, the elastic section 151 of the diaphragm 15 is compressed, the feed check valve 2 is closed, and the material inside the diaphragm 15 is discharged from the discharge check valve 3. Example

[0024] like Figure 6 , Figure 7 As shown, a vertical structure plunger pump has two vertical pump bodies 6, two sleeve diaphragm devices 1 are arranged, the connecting pipe 16 of the cylindrical diaphragm device 1 is connected to the pump body 6, the inlets of two sets of feed check valves 2 are connected, and a common feed port is arranged; the outlets of two sets of discharge check valves 3 are connected, and a common discharge port is arranged; one plunger is pressed down, and the diaphragm 15 of the corresponding cylindrical diaphragm device 1 is compressed and pumps out the material, while the other plunger rises, and the diaphragm 15 of the corresponding cylindrical diaphragm device 1 expands and inhales the material. Example

[0025] like Figure 8 As shown, a horizontal structure plunger pump has a pump body 6 at both ends of the hydraulic cylinder, a piston rod passes through the pump body at both ends and one in the middle, plungers are arranged at both ends of the piston rod, and the hydraulic system drives the plunger to reciprocate; two sleeve diaphragm devices 1 are arranged, and the connecting pipe 16 of the cylindrical diaphragm device 1 is connected to the pump body 6, the inlets of two sets of feed check valves 2 are connected, and a common feed port is arranged; the outlets of two sets of discharge check valves 3 are connected, and a common discharge port is arranged; the plunger moves to one end, and the diaphragm 15 of the cylindrical diaphragm device 1 at the corresponding end compresses and presses out the material, and at the same time, the diaphragm 15 of the corresponding cylindrical diaphragm device 1 at the other end of the pump body expands and inhales the material.

Claims

1. A plunger pump using a cylindrical diaphragm device, characterized in that: A cylindrical diaphragm device is used, which includes: a cylinder, a grille, an upper flange, a lower flange, a diaphragm, and a connecting pipe; the middle of the cylinder is a cylindrical straight section, the top of the straight section is provided with an upper flange, the lower part of the straight section is provided with a lower flange, the upper flange and the lower flange are provided with bolt holes, a connecting pipe is provided on the side of the cylinder, and the connecting pipe is connected to the pump body; a cylindrical grille with a hole is provided inside the cylinder; the middle of the diaphragm is a cylindrical elastic section, the upper and lower ends are provided with fixing rings respectively, and the diaphragm is placed in the middle of the cylinder; the The upper flange has the same size as the upper flange of the cylinder, and a material hole is set in the middle of the upper flange; the lower flange has the same size as the lower flange of the cylinder, and a material hole is set in the middle of the lower flange; bolts are passed through the bolt holes of the upper flange and the upper flange of the cylinder to fix the upper flange and the cylinder and clamp the fixing ring of the diaphragm; bolts are passed through the bolt holes of the lower flange and the lower flange of the cylinder to fix the lower flange and the cylinder and clamp the fixing ring of the diaphragm; the inlet of the discharge check valve is connected to the material hole of the upper flange, and the outlet of the feed check valve is connected to the material hole of the lower flange.

2. The plunger pump using a cylindrical diaphragm device as claimed in claim 1, characterized in that: A water injection valve is arranged on the connecting pipe, and an exhaust valve is arranged on the upper side of the cylinder.

3. The plunger pump using a cylindrical diaphragm device as claimed in claim 1, characterized in that: The double-pump-body structure plunger pump has two sleeve-type diaphragm devices arranged in parallel, the connecting pipes of the sleeve-type diaphragm devices are respectively connected to the two pump bodies, the inlets of the two sets of feed check valves are connected, and a common feed port is set; the outlets of the two sets of discharge check valves are connected, and a common discharge port is set.

4. The working principle of the plunger pump using a cylindrical diaphragm device as claimed in claim 1, characterized in that: 1) Suction: The plunger moves back, and under the action of air pressure, the medium outside the diaphragm enters the pump body through the connecting pipe, the elastic section of the diaphragm expands, the discharge check valve closes, and the material enters the inside of the diaphragm through the feed check valve; 2) Discharging: The plunger pushes forward, the medium in the pump body enters the cylinder through the connecting pipe, the elastic section of the diaphragm is compressed, the feed check valve is closed, and the material inside the diaphragm is discharged from the discharge check valve.

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