CN114753983A

CN114753983A - High-pressure plunger pump assembly

Info

Publication number: CN114753983A
Application number: CN202210512657.0A
Authority: CN
Inventors: 张国权
Original assignee: Ningbo Haichuan Medical Instrument Co ltd
Current assignee: Ningbo Haichuan Medical Instrument Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-07-15

Abstract

The invention discloses a high-pressure plunger pump assembly, which comprises a pump shell formed by assembling a water inlet body, a cylinder body, a pump body and a swash plate box, and a plunger and a swash plate mechanism arranged in the pump shell; the top surface of the cylinder body is formed with three one-way valve cavities and a pressure regulating valve cavity, and the three one-way valve cavities are communicated with the pressure regulating valve cavity through a main drainage pore passage; one side of the pressure regulating valve cavity is communicated with a water outlet, and a manual pressure regulating valve for regulating the water discharge pressure by controlling the opening size between the main water discharge hole channel and the water outlet is arranged in the pressure regulating valve cavity; three plunger cavities are formed in the cylinder body at an interval of 120 degrees in the circumferential direction, the side walls of the three plunger cavities are correspondingly communicated with the bottoms of the three one-way valve cavities one by one through three branch drainage channels formed in the cylinder body, and a drainage one-way valve for preventing drained water from flowing back is installed in each one-way valve cavity. The invention has the advantages of compact structure, high rated pressure, stable performance, convenient pressure adjustment and simple and easy operation.

Description

High-pressure plunger pump assembly

Technical Field

The invention relates to the technical field of high-pressure pumps, in particular to a high-pressure plunger pump assembly.

Background

The high-pressure plunger pump realizes liquid suction and liquid pressing by changing the volume of the sealed working cavity through the reciprocating motion of the plunger in the cylinder body, and has the advantages of high rated pressure, compact structure, high efficiency and the like. The device is widely applied to working occasions of high pressure, large flow and the like.

The high-pressure plunger pump in the prior art usually needs a special tool in pressure adjustment, so that the regulating valve is rotated by the tool to regulate the pressure of the pump, and therefore, the regulation is not convenient enough.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a high pressure plunger pump assembly with compact structure, high rated pressure, stable performance and convenient pressure adjustment, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a high-pressure plunger pump assembly comprises a pump shell formed by assembling a water inlet body, a cylinder body, a pump body and a swash plate box, a plunger arranged in the pump shell and a swash plate mechanism used for pushing the plunger to reciprocate; the top surface of the cylinder body is formed with three longitudinally arranged one-way valve cavities and a longitudinally arranged pressure regulating valve cavity in a straight line arrangement manner, and the upper parts of the three one-way valve cavities are communicated with the pressure regulating valve cavity through a main drainage hole channel; one side of the pressure regulating valve cavity is horizontally communicated with a water outlet, and a manual pressure regulating valve for regulating the water discharge pressure by controlling the opening size between the main water discharge hole channel and the water outlet is arranged in the pressure regulating valve cavity; three plunger cavities for installing plungers are formed in the cylinder body at intervals of 120 degrees in the circumferential direction, so that a three-cylinder high-pressure plunger pump is formed; the side walls of the three plunger cavities are correspondingly communicated with the cavity bottoms of the three one-way valve cavities one by one through three branch drainage channels formed in the cylinder body, and a drainage one-way valve for preventing drained water from flowing back is arranged in each one-way valve cavity.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the manual pressure regulating valve consists of a sealing insert, a sealing block, a separating ring, a pressure regulating valve rod, a pressure regulating valve body, a lower spring seat, a pressure regulating spring, an upper spring seat and a pressure regulating handle; a throat opening for communicating the main drainage channel with the drainage outlet is formed at the bottom of the pressure regulating valve cavity, and the sealing insert is embedded at the throat opening of the pressure regulating valve cavity; the pressure regulating valve body is provided with an upper thread section and a lower thread section, and the lower thread section of the pressure regulating valve body is spirally arranged in a cavity opening of the pressure regulating valve cavity; the pressure regulating handle is spirally matched with the upper thread section of the pressure regulating valve body to press and install the upper spring seat, the pressure regulating spring, the lower spring seat and the pressure regulating valve rod in the inner cavity of the pressure regulating valve body in turn; the lower part of the pressure regulating valve rod extends out of the inner cavity of the pressure regulating valve body, and the separating ring is sleeved at the lower part of the pressure regulating valve rod; the sealing block is arranged at the bottom end of the pressure regulating valve rod and is matched with the sealing insert to control the size of an opening between the main drainage pore passage and the drainage outlet.

The water inlet body is fixedly connected with the cylinder body through three first bolts, and a first sealing ring for sealing is arranged between the water inlet body and the cylinder body in a pressing manner; the water inlet body is matched with the cylinder body to form a water inlet cavity, a water inlet communicated with the water inlet cavity is processed in the water inlet body, a water inlet pore passage communicated with the water inlet cavity and the plunger cavity is processed in the cylinder body, and a water inlet one-way valve is installed in the water inlet pore passage.

The cylinder body is fixedly connected with the pump body through three second bolts, a guide sliding hole for guiding the reciprocating motion of the plunger is processed on the pump body, and the plunger is matched with the guide sliding hole in a penetrating and sliding manner; the water leakage preventing assembly is pressed between the cylinder body and the pump body and assembled with the plunger sealing sleeve, the water leakage preventing assembly is composed of a positioning check ring and plunger oil seals pressed at two ends of the positioning check ring, and the positioning check ring is sleeved with an O-shaped ring.

The pump body is fixedly connected with the swash plate box through three third bolts, and a second sealing ring is pressed between the pump body and the swash plate box.

The plunger is sleeved with a plunger spring, the front end of the plunger is clamped with a plunger snap spring, one end of the plunger spring is abutted with the pump body, and the other end of the plunger spring is abutted with the plunger snap spring.

The swash plate mechanism consists of a swash plate, a non-standard plane bearing and a swash plate bearing; the outer ring of the swash plate bearing is tightly matched and clamped on a bearing mounting position formed by the swash plate box, and a transmission shaft of the swash plate is sleeved and matched with the inner ring of the swash plate bearing; the plane bearing is installed on the swash plate and is matched with the hemisphere at the front end of the plunger in a top connection mode.

The transmission shaft of the swash plate is embedded with a wear-resistant steel sleeve, and the swash plate box is provided with a swash plate oil seal which is assembled with the transmission shaft seal sleeve of the swash plate; a water seal cap is spirally arranged on the one-way valve cavity.

Compared with the prior art, three plunger cavities for installing plungers are formed in the cylinder body at an interval of 120 degrees in the circumferential direction, so that a three-cylinder high-pressure plunger pump is formed, three longitudinally-arranged one-way valve cavities and a longitudinally-arranged pressure regulating valve cavity are integrally formed in the cylinder body, a drainage one-way valve is installed in each one-way valve cavity, the drainage one-way valve can prevent discharged water from flowing back, a manual pressure regulating valve is installed in each pressure regulating valve cavity, and the drainage pressure of the plunger pump can be conveniently regulated by manually rotating the manual pressure regulating valve.

The invention has the advantages of compact structure, high rated pressure, stable performance, convenient pressure adjustment and simple and easy operation.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a cross-sectional view of the cross-section C-C of FIG. 2;

FIG. 4 is a sectional view of the structure of FIG. 2 from D to D;

fig. 5 is an exploded view of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 5 are schematic structural views of the present invention.

Wherein the reference numbers are: the water inlet check valve F1, the drain check valve F2, a water inlet cavity K, a first bolt L1, a second bolt L2, a third bolt L3, a first sealing ring M1, a second sealing ring M2, a plunger oil seal M3, a swash plate oil seal M4, a positioning retainer ring Q, O ring Q1, a main drainage hole S1, a branch drainage hole S2, a drainage port T, a water inlet body 1, a water inlet 1a, a cylinder body 2, a plunger cavity 2a, a water inlet hole 2b, a check valve cavity 21, a pressure regulating valve cavity 22, a pump body 3, a guide sliding hole 3a, a swash plate box 4, a plunger 5, a plunger spring 51, a plunger snap spring 52, a manual pressure regulating valve 6, a sealing insert 61, a sealing block 62, a separating ring 63, a pressure regulating valve rod 64, a pressure regulating valve body 65, a lower spring seat 66, a pressure regulating spring 67, an upper spring seat 68, a pressure regulating valve seat 69, a pressure regulating bearing seat 71, a plane bearing 72, a plane bearing 73, a steel bushing 74 and a swash plate 8.

As shown in fig. 1 to 5, the present invention discloses a high pressure plunger pump assembly, which comprises a pump housing assembled by four major parts of a water inlet body 1, a cylinder body 2, a pump body 3 and a swash plate box 4, wherein a plunger 5 and a swash plate mechanism for pushing the plunger 5 to reciprocate are arranged in the pump housing; the plunger 5 performs a reciprocating motion to change the volume of the plunger chamber, thereby performing suction and pressing. The biggest contribution of the invention is as follows: four longitudinally arranged valve cavities are integrally formed on the top surface of the cylinder body 2, the four valve cavities comprise three one-way valve cavities 21 and one pressure regulating valve cavity 22, and the three one-way valve cavities 21 and the pressure regulating valve cavity 22 are arranged on the cylinder body 2 in a straight line shape. The upper parts of the three check valve cavities 21 are communicated with the pressure regulating valve cavity 22 through a main water discharge hole S1 which is horizontally arranged. As can be seen from fig. 1 and 2, a drain port T is formed at one side of the pressure regulating valve chamber 22 to communicate with the pressure regulating valve chamber 22, so that water can be drained through the main drain passage S1, the pressure regulating valve chamber 22 and the drain port T. The manual pressure regulating valve 6 is arranged in the pressure regulating valve cavity 22 of the invention, and by utilizing the manual pressure regulating valve 6, people can control the opening size between the main drainage duct S1 and the drainage port T by manually rotating the manual pressure regulating valve 6, thereby achieving the purpose of regulating the drainage pressure. As can be seen from fig. 5, three plunger chambers 2a for receiving the plungers 5 are formed in the cylinder block 2 of the present invention, so that a high-pressure plunger pump of a three-cylinder type can be formed, and the three plunger chambers 2a are distributed at 120 degrees apart in the circumferential direction. As can be seen from fig. 4, three branch drainage channels S2 are formed inside the cylinder 2, one end of each branch drainage channel S2 is communicated with the bottom of the corresponding check valve cavity 21, and the other end of each branch drainage channel S2 is communicated with the side wall of the corresponding plunger cavity 2 a. In order to prevent the water discharged from the plunger chamber 2a from flowing back through the branch water discharge passage S2, a drain check valve F2 for preventing the discharged water from flowing back is installed in each check valve chamber 21. In order to prevent the leakage of the orifice of the one-way valve cavity 21, a water seal cap 8 is spirally arranged in the orifice of the one-way valve cavity 21, and a water seal ring for sealing is sleeved and pressed on the water seal cap 8.

In the embodiment shown in fig. 4 and 5, the manual pressure regulating valve 6 of the present invention is composed of a sealing insert 61, a sealing block 62, a separating ring 63, a pressure regulating valve rod 64, a pressure regulating valve body 65, a lower spring seat 66, a pressure regulating spring 67, an upper spring seat 68 and a pressure regulating handle 69. The bottom of the pressure regulating valve cavity 22 is provided with a throat for communicating the main drainage channel S1 with the drainage port T, the sealing insert 61 is embedded at the throat of the pressure regulating valve cavity 22, and the sealing insert 61 is also sleeved with an O-shaped ring for sealing. The pressure regulating valve body 65 is provided with an upper thread section and a lower thread section, and the lower thread section of the pressure regulating valve body 65 is spirally arranged in the cavity opening of the pressure regulating valve cavity 22. The pressure regulating handle 69 is spirally matched with the upper thread section of the pressure regulating valve body 65, and the spring upper seat 68, the pressure regulating spring 67, the spring lower seat 66 and the pressure regulating valve rod 64 are sequentially pressed in the inner cavity of the pressure regulating valve body 65. The pretension pressure applied by the pressure regulating spring 67 to the pressure regulating valve rod 64 can be adjusted by manually rotating the pressure regulating handle 69. The lower part of the pressure regulating valve rod 64 extends out of the inner cavity of the pressure regulating valve body 65, and the separating ring 63 is sleeved at the lower part of the pressure regulating valve rod 64. The sealing block 62 is disposed at the bottom end of the pressure regulating valve stem 64, and the sealing block 62 cooperates with the sealing insert 61 to control the size of the opening between the main discharge passage S1 and the discharge port T.

In the embodiment, the water inlet body 1 of the invention is fixedly connected with the cylinder body 2 through three first bolts L1, a first sealing ring M1 for sealing is pressed between the water inlet body 1 and the cylinder body 2, and the first sealing ring M1 is used for ensuring that no water leakage exists between the water inlet body 1 and the cylinder body 2. The water inlet body 1 is matched with the cylinder body 2 to form a water inlet cavity K, and a water inlet 1a communicated with the water inlet cavity K is processed in the water inlet body 1. A water inlet pore passage 2b used for communicating the water inlet cavity K with the plunger cavity 2a is processed in the cylinder body 2, and the water inlet pore passage 2b is communicated with the bottom of the plunger cavity 2 a. To prevent the water in the plunger chamber 2a from flowing back to the water inlet chamber K when the plunger 5 reciprocates, a water inlet check valve F1 is installed in the water inlet passage 2 b. As can be seen from fig. 5, the peripheries of the inlet check valve F1 and the outlet check valve F2 are sleeved with sealing rings.

In the embodiment of the invention, the cylinder body 2 and the pump body 3 are fixedly connected through three second bolts L2, the pump body 3 is provided with a guide sliding hole 3a for guiding the reciprocating motion of the plunger 5, and the plunger 5 is slidably penetrated and matched with the guide sliding hole 3 a. A water leakage prevention assembly which is assembled with the plunger 5 in a sealing way is arranged between the cylinder body 2 and the pump body 3 in a pressing way. The water leakage preventing assembly can prevent the high-pressure water in the plunger cavity 2a from entering the space formed by the pump body 3 and the swash plate box 4 through the peripheral wall of the plunger 5. The water leakage preventing assembly consists of a positioning check ring Q and plunger oil seals M3 press-fitted at two ends of the positioning check ring Q, and the positioning check ring Q is sleeved with an O-shaped ring Q1.

In the embodiment of the present invention, the pump body 3 and the swash plate case 4 are fixedly connected by three third bolts L3, and a second seal M2 is press-fitted between the pump body 3 and the swash plate case 4. The second sealing ring M2 can ensure that the space formed between the pump body 3 and the swash plate case 4 is in a relatively sealed environment.

In the embodiment, the plunger 5 is sleeved with a plunger spring 51, the front end of the plunger 5 is clamped with a plunger snap spring 52, one end of the plunger spring 51 is abutted with the pump body 3, and the other end of the plunger spring 51 is abutted with the plunger snap spring 52. According to the invention, when the plunger cavity 2a absorbs water, the plunger 5 is extended by the spring force of the plunger spring 51.

The swash plate mechanism of the invention is composed of a swash plate 71, a non-standard plane bearing 72 and a swash plate bearing 73; the outer ring of the swash plate bearing 73 is tightly matched and clamped on a bearing installation position formed by the swash plate box 4, and a transmission shaft of the swash plate 71 is sleeved and matched with the inner ring of the swash plate bearing 73; the plane bearing 72 is mounted on the swash plate 71, and the plane bearing 72 is abutted against and fitted to a hemisphere of the front end of the plunger 5. The inclined plate 71 has a certain angle with its transmission shaft, this angle limits the effective stroke of the reciprocating motion of the plunger 5, the inclined plate 71 pushes the plunger 5 to compress the plunger spring 51 through the non-standard plane bearing 72, so that the water in the plunger cavity 2a is pressurized and enters the main water discharge channel S1 through the branch water discharge channel S2 and the water discharge check valve F2.

In order to prolong the service life of the transmission shaft, in the embodiment, a wear-resistant steel sleeve 74 is embedded on the transmission shaft of the swash plate 71, and a swash plate oil seal M4 which is matched with the transmission shaft of the swash plate 71 in a sealing way is arranged on the swash plate box 4.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by one skilled in the art without departing from the scope of the invention.

Claims

1. A high-pressure plunger pump assembly comprises a pump shell formed by assembling a water inlet body (1), a cylinder body (2), a pump body (3) and a swash plate box (4), a plunger (5) arranged in the pump shell and a swash plate mechanism used for pushing the plunger (5) to do reciprocating motion; the method is characterized in that: the top surface of the cylinder body (2) is formed with three longitudinally arranged one-way valve cavities (21) and a longitudinally arranged pressure regulating valve cavity (22) in a straight line arrangement manner, and the upper parts of the three one-way valve cavities (21) are communicated with the pressure regulating valve cavity (22) through a main drainage pore passage (S1); a water outlet (T) is horizontally communicated with one side of the pressure regulating valve cavity (22), and a manual pressure regulating valve (6) for regulating the water discharge pressure by controlling the opening size between the main water discharge hole passage (S1) and the water outlet (T) is installed in the pressure regulating valve cavity (22); three plunger cavities (2a) for installing plungers (5) are formed in the cylinder body (2) at an interval of 120 degrees in the circumferential direction, so that a three-cylinder high-pressure plunger pump is formed; the side walls of the three plunger cavities (2a) are correspondingly communicated with the bottoms of the three one-way valve cavities (21) one by one through three branch drainage channels (S2) formed in the cylinder body (2), and each one-way valve cavity (21) is internally provided with a drainage one-way valve (F2) for preventing drained water from flowing back.

2. A high pressure plunger pump assembly as set forth in claim 1, wherein: the manual pressure regulating valve (6) consists of a sealing insert (61), a sealing block (62), a separating ring (63), a pressure regulating valve rod (64), a pressure regulating valve body (65), a lower spring seat (66), a pressure regulating spring (67), an upper spring seat (68) and a pressure regulating handle (69); a throat opening for communicating a main drainage channel (S1) with a drainage opening (T) is formed at the bottom of the pressure regulating valve cavity (22), and the sealing insert (61) is embedded at the throat opening of the pressure regulating valve cavity (22); the pressure regulating valve body (65) is provided with an upper thread section and a lower thread section, and the lower thread section of the pressure regulating valve body (65) is spirally arranged in a cavity opening of the pressure regulating valve cavity (22); the pressure regulating handle (69) is spirally matched with the upper thread section of the pressure regulating valve body (65) to press and assemble the upper spring seat (68), the pressure regulating spring (67), the lower spring seat (66) and the pressure regulating valve rod (64) in the inner cavity of the pressure regulating valve body (65) in sequence; the lower part of the pressure regulating valve rod (64) extends out of an inner cavity of a pressure regulating valve body (65), and the separating ring (63) is sleeved at the lower part of the pressure regulating valve rod (64); the sealing block (62) is arranged at the bottom end of the pressure regulating valve rod (64), and the sealing block (62) is matched with the sealing insert (61) to control the opening size between the main drainage hole channel (S1) and the drainage port (T).

3. A high pressure plunger pump assembly as set forth in claim 2, wherein: the water inlet body (1) is fixedly connected with the cylinder body (2) through three first bolts (L1), and a first sealing ring (M1) for sealing is arranged between the water inlet body (1) and the cylinder body (2) in a pressing mode; advance water body (1) and cylinder body (2) cooperate and be formed with intake antrum (K), water body (1) processing have water inlet (1a) of intercommunication intake antrum (K), cylinder body (2) in processing have water inlet channel (2b) that are used for intercommunication intake antrum (K) and plunger chamber (2a), install into water check valve (F1) in this water inlet channel (2 b).

4. A high pressure plunger pump assembly as set forth in claim 3, wherein: the cylinder body (2) is fixedly connected with the pump body (3) through three second bolts (L2), a guide sliding hole (3a) used for guiding the reciprocating motion of the plunger (5) is formed in the pump body (3), and the plunger (5) is slidably penetrated and matched with the guide sliding hole (3 a); the anti-leakage pump is characterized in that an anti-leakage assembly matched with a plunger (5) in a sealing sleeve manner is arranged between the cylinder body (2) and the pump body (3) in a pressing manner, the anti-leakage assembly consists of a positioning check ring (Q) and plunger oil seals (M3) arranged at two ends of the positioning check ring (Q), and the positioning check ring (Q) is sleeved with an O-shaped ring (Q1).

5. A high pressure plunger pump assembly as set forth in claim 4, wherein: the pump body (3) is fixedly connected with the swash plate box (4) through three third bolts (L3), and a second sealing ring (M2) is arranged between the pump body (3) and the swash plate box (4) in a pressing mode.

6. A high pressure plunger pump assembly as set forth in claim 5, wherein: the plunger (5) is sleeved with a plunger spring (51), the front end of the plunger (5) is clamped with a plunger snap spring (52), one end of the plunger spring (51) is abutted with the pump body (3), and the other end of the plunger spring (51) is abutted with the plunger snap spring (52).

7. A high pressure plunger pump assembly as set forth in claim 6, wherein: the swash plate mechanism consists of a swash plate (71), a non-standard plane bearing (72) and a swash plate bearing (73); the outer ring of the swash plate bearing (73) is tightly matched and clamped on a bearing installation position formed by the swash plate box (4), and a transmission shaft of the swash plate (71) is sleeved and matched with the inner ring of the swash plate bearing (73); the plane bearing (72) is arranged on the swash plate (71), and the plane bearing (72) is in top connection and matching with a hemisphere at the front end of the plunger (5).

8. A high pressure plunger pump assembly as set forth in claim 7, wherein: a transmission shaft of the swash plate (71) is provided with an embedded wear-resistant steel sleeve (74), and a swash plate oil seal (M4) which is assembled with a transmission shaft sealing sleeve of the swash plate (71) is arranged on the swash plate box (4); and a water seal cap (8) is spirally arranged on the one-way valve cavity (21).