CN108757429B

CN108757429B - Pump head with liquid plunger chamber

Info

Publication number: CN108757429B
Application number: CN201810747101.3A
Authority: CN
Inventors: 李建平; 王伟涛; 武思宇
Original assignee: Zhongyan Technology Co Ltd
Current assignee: Zhongyan Technology Co Ltd
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2020-08-18
Anticipated expiration: 2038-07-09
Also published as: CN108757429A

Abstract

The invention provides a liquid plunger chambered pump head, which well solves the difficult problems of high pressure and large flow liquid transportation, for example, the highest pressure can reach 50mpa when slurry is transported, the maximum flow is 400L/min, the power is 350Kw, the pump head is not reachable by a common plunger pump and a diaphragm pump, the elastic membrane of the liquid plunger chambered pump head isolates the transported fluid from the liquid plunger, so that the plunger is in a good working environment, and the abrasion and corrosion of the rigid plunger are greatly reduced; the plunger extrudes a pressure medium, the pressure medium serves as a liquid plunger and is uniformly acted on one side of the elastic membrane, the elastic membrane deforms to extrude fluid to complete conveying, pressure on two sides of the elastic membrane synchronously changes along with the change of fluid load, the elastic membrane does not serve as a pressure bearing part, the elastic membrane is prevented from being damaged by fluid pressure, the output pressure of the pump head is not limited by the self attribute of the elastic membrane, and the size of the elastic membrane can be adjusted according to the displacement requirement.

Description

Pump head with liquid plunger chamber

Technical Field

The invention discloses a pump head device with a liquid plunger chamber, which can be used for conveying high-pressure water, cement paste, oil, corrosive liquid and other fluids and can be widely used in the industries of high-pressure and high-flow fluid conveying, polluted soil/sludge treatment, jet grouting/directional drilling/anchor jetting construction, oil drilling and the like.

Background

For high-pressure large-flow liquid conveying, the conventional plunger pump is mostly adopted in the conventional equipment, and has the defects that when slurry is conveyed, the plunger is damaged by the principle similar to high-pressure water cutting when the slurry is slightly leaked in a sealing manner, and when corrosive liquid is conveyed, a pump body is seriously corroded and the service life is greatly shortened due to the poor corrosion resistance of a common plunger and a cylinder body sealing piece; the above-mentioned problem can be solved to traditional diaphragm pump, but because the restriction of diaphragm material attribute and diaphragm pump structure can't provide the high pressure and the large-traffic transport that satisfy the demand.

Disclosure of Invention

In order to solve the problems, the invention provides a liquid plunger chambered pump head, which well solves the difficult problems in high-pressure large-flow liquid delivery, such as the highest pressure in slurry delivery can reach 50mpa, meanwhile, the maximum flow is 400L/min, the power is 350Kw, which can not be reached by a common plunger pump and a diaphragm pump, the elastic membrane of the liquid plunger chambered pump head isolates the delivered fluid from the liquid plunger, so that the plunger is in a good working environment, and the abrasion and corrosion of the rigid plunger are greatly reduced; the plunger extrudes a pressure medium, the pressure medium serves as a liquid plunger and is uniformly acted on one side of the elastic membrane, the elastic membrane deforms to extrude fluid to complete conveying, pressure on two sides of the elastic membrane synchronously changes along with the change of fluid load, the elastic membrane does not serve as a pressure bearing part, the elastic membrane is prevented from being damaged by fluid pressure, the output pressure of the pump head is not limited by the self attribute of the elastic membrane, and the size of the elastic membrane can be adjusted according to the displacement requirement.

The invention is realized by the following devices:

the pump body, pump body seal assembly, the pump body plunger, pump head seal assembly, the oil tank, withstand voltage connecting pipe, vacuum oil supplementing valve, high-pressure overflow valve, oil return tank, the pressure medium cavity, pressure medium cavity fixing bolt, pressure medium, elastic membrane base seal assembly, elastic membrane chamber base, the elastic membrane, the transport fluid, elastic membrane chamber gland, check valve seal assembly, the piece formula check valve of import, check valve clamp plate seal assembly, import check valve clamp plate, the fluid inlet connects, screw rod subassembly, the water conservancy diversion piece, water conservancy diversion piece fixed screw rod subassembly, the piece formula check valve of export, the check valve clamp plate of export, hexagon socket head cap screw, the fluid outlet connects, the high-pressure pipe.

Description of the drawings:

FIG. 1 is a schematic diagram of a pump head structure of a liquid plunger subchamber;

reference number designation: 1-pump body, 2-pump body sealing component, 3-pump body plunger, 4-pump head sealing component, 5-oil tank, 6-pressure-resistant connecting pipe, 7-vacuum oil-supplementing valve, 8-high-pressure overflow valve, 9-oil return tank, 10-pressure medium cavity, 11-pressure medium cavity fixing bolt, 12-pressure medium, 13-elastic membrane base sealing component, 14-elastic membrane cavity base, 15-elastic membrane, 16-conveying fluid, 17-elastic membrane cavity gland, 18-check valve sealing component, 19-inlet sheet type check valve, 20-check valve pressure plate sealing component, 21-inlet check valve pressure plate, 22-fluid inlet joint, 23-screw rod component, 24-flow guide block, 25-flow guide block fixing screw rod component, 26-outlet sheet type one-way valve, 27-outlet one-way valve pressure plate, 28-inner hexagonal cylinder screw and 29-fluid outlet joint;

FIG. 2 is a schematic diagram of one stroke operation of a liquid plunger chambered pump head;

reference number designation: 30-high pressure tube.

The specific implementation mode is as follows:

the pump body 1 is provided with a pump body sealing assembly 2, a pump body plunger 3 and a pump head sealing assembly 4, a pressure medium cavity 10 is fixed and pressed on the pump body 1 by a pressure medium cavity fixing bolt 11, a supplement and overflow device of a pressure medium 12 is arranged on the pressure medium cavity 10, the supplement and overflow device consists of an oil tank 5, a pressure-resistant connecting pipe 6, a vacuum oil supplement valve 7, a high-pressure overflow valve 8 and an oil return tank 9 and is connected on the pressure medium cavity 10 in a mode shown in the figure, the pressure medium 12 filled in the pressure medium cavity 10 serves as a liquid plunger, the pressure medium 12 has certain viscosity and has a lubricating and rust-proof function, an elastic membrane cavity base 14 is arranged in a channel below the pressure medium cavity 10 and is sealed by an elastic membrane base sealing assembly 13, an elastic membrane 15 is pressed and sealed by an elastic membrane cavity pressing cover 17, the elastic membrane 15 separates the pressure medium 12 from a conveying fluid 16 to enable the pump body plunger 3 to, greatly reducing the abrasion and corrosion of the rigid plunger, leading an elastic membrane cavity gland 17 to be provided with an inlet sheet type one-way valve 19 and sealed by a one-way valve sealing assembly 18, leading the inlet sheet type one-way valve 19 and an inlet one-way valve pressure plate 21 to be sealed by a one-way valve pressure plate sealing assembly 20, leading an elastic membrane base sealing assembly 13, an elastic membrane cavity base 14, an elastic membrane 15, conveying fluid 16, the elastic membrane cavity gland 17, the one-way valve sealing assembly 18, the inlet sheet type one-way valve 19, the one-way valve pressure plate sealing assembly 20 and an inlet one-way valve pressure plate 21 to be integrally fixed and pressed by a screw assembly 23, leading a fluid inlet joint 22 is arranged on the inlet one-way valve pressure plate 21 and used for injecting the conveying fluid 16 to be conveyed into a pump head, a flow guide block 24 is arranged at one end of the elastic membrane cavity gland 17, the flow guide block 24 is pressed by a flow guide block fixing screw assembly 25 and fixed, the opening and closing of the outlet disc type check valve 26 are facilitated, the outlet disc type check valve 26 and the outlet check valve pressing plate 27 are fixedly pressed on the flow guide block 24 by the hexagon socket head cap screws 28 and are sealed by the same sealing assemblies as the check valve sealing assembly 18 and the check valve pressing plate sealing assembly 20, the outlet check valve pressing plate 27 is provided with the fluid outlet joint 29 and is connected with the high-pressure pipe 30 to be conveyed out, a certain amount of pressure medium 12 is discharged in one stroke of the pump body plunger 3, the pressure medium 12 serves as a liquid plunger and enters the elastic membrane cavity to uniformly act on one side of the elastic membrane 15 to extrude the elastic membrane 15, the elastic membrane 15 is pressed, deformed and extrudes the conveying fluid 16, the fluid is discharged through the outlet disc type check valve 26, the two sides of the elastic membrane 15 are filled with the pressure medium 12 and the conveying fluid 16 with equal pressure, and the elastic membrane 15 does not serve as. Otherwise, the pump plunger 3 generates a certain negative pressure in a return stroke, the atmospheric pressure enables the conveying fluid 16 to enter the elastic membrane cavity through the inlet sheet type one-way valve 19, the supplementing and overflowing devices (

serial numbers

5, 6, 7, 8 and 9) of the pressure medium 12 unload the pressure medium 12 to the oil return tank 9 through the high-pressure overflow valve 8 in order to ensure safety when the pressure of the pressure medium 12 reaches a set value, the volume of the pressure medium 12 after unloading is not enough to meet the return stroke action of the pump plunger 3, the elastic membrane 15 returns to an initial position and seals a channel below the pressure medium cavity 10, the pump plunger 3 continuously returns backwards, the pump plunger 3 continuously returns to generate a vacuum negative pressure, and the atmospheric pressure supplements the pressure medium 12 in the oil tank 5 to the pressure medium cavity 10 through the pressure-resistant connecting pipe 6 and the vacuum oil.

Claims

1. A pump head with a liquid plunger chamber is used for conveying slurry and is characterized in that a pump body sealing assembly (2), a pump body plunger (3) and a pump head sealing assembly (4) are mounted on a pump body (1), a pressure medium cavity (10) is fixed and pressed on the pump body (1) through a pressure medium cavity fixing bolt (11), a supplementing and overflowing device for pressure medium (12) is mounted on the pressure medium cavity (10), and the supplementing and overflowing device is formed by sequentially connecting an oil tank (5), a pressure-resistant connecting pipe (6), a vacuum oil supplementing valve (7), a high-pressure overflowing valve (8) and an oil returning tank (9) in series and is connected to the pressure medium cavity (10); pressure medium (12) is filled in the pressure medium cavity (10), the pressure medium (12) has certain viscosity and has the functions of lubrication and rust prevention, the elastic membrane base sealing assembly (13) is arranged in a channel below the pressure medium cavity (10) and is sealed by the elastic membrane base sealing assembly (13), the elastic membrane (15) is pressed and sealed by the elastic membrane cavity gland (17), and the pressure medium (12) is separated from the conveying fluid (16) by the elastic membrane (15);

an inlet sheet type one-way valve (19) is arranged on the elastic membrane cavity gland (17) and is sealed by a one-way valve sealing assembly (18), and the inlet sheet type one-way valve (19) and an inlet one-way valve pressure plate (21) are sealed by a one-way valve pressure plate sealing assembly (20);

the elastic membrane pressure plate sealing device comprises an elastic membrane base sealing assembly (13), an elastic membrane cavity base (14), an elastic membrane (15), conveying fluid (16), an elastic membrane cavity pressure cover (17), a one-way valve sealing assembly (18), an inlet sheet type one-way valve (19), a one-way valve pressure plate sealing assembly (20), and an inlet one-way valve pressure plate (21) which is integrally fixed and pressed by a screw assembly (23);

a fluid inlet joint (22) is arranged on the inlet one-way valve pressure plate (21), conveying fluid (16) to be conveyed is injected into the pump head, a flow guide block (24) is arranged at one end of the elastic membrane cavity gland (17), and the flow guide block (24) is pressed by a flow guide block fixing screw component (25) and is fixed on one side of the elastic membrane cavity gland (17);

the outlet sheet type one-way valve (26) and the outlet one-way valve pressure plate (27) are fixedly pressed on the flow guide block (24) by the hexagon socket head cap screw (28) and are sealed by the same sealing components as the one-way valve sealing component (18) and the one-way valve pressure plate sealing component (20); a fluid outlet joint (29) is arranged on the outlet one-way valve pressure plate (27) and is used for connecting a high-pressure pipe (30);

a certain amount of pressure medium (12) is discharged in one stroke of the pump body plunger (3), the pressure medium (12) is extruded into the elastic membrane cavity to uniformly act on one side of the elastic membrane (15) to extrude the elastic membrane (15), the elastic membrane (15) is pressed to deform to extrude the conveying fluid (16), the conveying fluid (16) is discharged through the outlet sheet type one-way valve (26), the pressure medium (12) and the conveying fluid (16) with equal pressure are filled at the two sides of the elastic membrane (15), and the elastic membrane (15) is not used as a pressure-bearing part;

the pump body plunger (3) generates a certain negative pressure in a return stroke, the atmospheric pressure enables conveying fluid (16) to enter the elastic membrane cavity through the inlet sheet type one-way valve (19), when the pressure of the pressure medium (12) reaches a set value, the pressure medium (12) is unloaded to the oil return tank (9) through the high-pressure overflow valve (8), the volume of the pressure medium (12) after unloading is not enough to meet the return stroke action of the pump body plunger (3), a channel below the pressure medium cavity (10) is closed when the elastic membrane (15) returns to an initial position, the pump body plunger (3) can return backwards, the pump body plunger (3) continues to return to generate a vacuum negative pressure, and the atmospheric pressure enables the pressure medium (12) in the oil tank (5) to be supplemented into the pressure medium cavity (10) through the pressure-resistant connecting pipe (6) and the vacuum oil supplementing.