CN110159811B - Pressure regulating overflow valve of high-pressure pump - Google Patents

Pressure regulating overflow valve of high-pressure pump Download PDF

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Publication number
CN110159811B
CN110159811B CN201910503096.6A CN201910503096A CN110159811B CN 110159811 B CN110159811 B CN 110159811B CN 201910503096 A CN201910503096 A CN 201910503096A CN 110159811 B CN110159811 B CN 110159811B
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valve
valve body
circumferential surface
hole
cylinder
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CN201910503096.6A
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Chinese (zh)
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CN110159811A (en
Inventor
崔津源
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Tianjin Haisheng Pump Making Co ltd
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Tianjin Haisheng Pump Making Co ltd
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Priority to CN201910503096.6A priority Critical patent/CN110159811B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise

Abstract

A pressure regulating relief valve for high pressure pump. The valve comprises a lower valve body, a valve seat, a valve core, a flow guide block, a gland, a spring lower cover, a spring upper cover, an upper valve body, an adjusting bolt, a steel ball and a nut; the pressure regulating overflow valve of the high-pressure pump provided by the invention has the following advantages: the valve core is provided with a plurality of guide holes for guiding the movement of the valve core, so that the valve core is good in neutrality, the valve core does not deviate in up-and-down movement, the sealing performance is good, and the pressure is stable. The sealing cavity between the valve core and the valve seat can buffer the valve core to a certain extent when the valve core moves up and down, so that the valve core and the valve port can not be strongly impacted when being closed or opened, the noise is small, and the service life is long.

Description

Pressure regulating overflow valve of high-pressure pump
Technical Field
The invention belongs to the technical field of hydraulic machinery, and particularly relates to a pressure regulating overflow valve of a high-pressure pump.
Background
The high-pressure reciprocating plunger pump is also called a plunger pump, is an important device in a hydraulic system, and the pressure regulating overflow valve is an indispensable pressure regulating device in the high-pressure pump system. The system pressure is regulated by control, so that the pressure fluctuation and the spring force can be balanced, and the outlet pressure is kept constant within a certain error range. However, the existing pressure-regulating overflow valve is not easy to meet the use requirements of high pressure resistance and high pressure regulation, and the regulation precision is not high, especially the high-pressure overflow valve is high in preset pressure value, and large torque is required to be provided during manual regulation, so that great effort is required, and a plurality of inconveniences are brought to high-pressure water pressure regulation.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the pressure regulating overflow valve of the high-pressure pump, which has the advantages of simple structure, small volume, high pressure regulating sensitivity and good stability.
In order to achieve the purpose, the pressure regulating overflow valve of the high-pressure pump comprises a lower valve body, a valve seat, a valve core, a flow guide block, a gland, a spring lower cover, a spring upper cover, an upper valve body, an adjusting bolt, a steel ball and a nut; the lower valve body is of a stepped structure, the upper diameter of the lower valve body is larger than that of the lower valve body, the lower port of the central hole is a liquid inlet, a liquid discharge hole is formed in the upper circumferential wall, and an internal thread is formed in the inner circumferential surface of the upper end part; the upper valve body is in a cover shape, an external thread matched with an internal thread at the upper end part of the lower valve body is formed on the outer circumferential surface of the lower end part, the lower end is connected with the upper end of the lower valve body, and a screw hole is formed in the center of the top surface; the valve seat is arranged in the lower valve body and is of a T-shaped structure, a lower guide hole is formed in the center of the top surface in a downward sinking mode, the upper port is a valve port, and a liquid inlet is formed in the lower circumferential wall; the lower part of the valve seat is inserted and fixed in the lower part of the central hole of the lower valve body, and the liquid inlet is communicated with the liquid inlet hole on the lower valve body; the flow guide block is annular, the lower part of the flow guide block is sleeved on the outer circumferential surface of the upper part of the valve seat, a plurality of flow through holes are formed in the middle circumferential wall at intervals along the circumferential direction, the flow through holes correspond to the liquid discharge holes in the lower valve body, the central hole of the flow guide block is a middle guide hole, and a groove is formed in the edge of the upper end of the flow guide block; the gland is also annular, is arranged at the upper end of the guide block, the outer circumferential surface is fixed on the inner circumferential surface of the upper part of the liquid discharge hole on the lower valve body, the central hole is called an upper guide hole, and the space surrounded by the lower valve body, the guide block and the gland is called an unloading cavity; the valve core consists of an end head, an upper cylinder, a large cylinder, an inverted cone and a lower cylinder which are sequentially connected from top to bottom, and is arranged in the upper guide hole, the middle guide hole and the lower guide hole in a manner of being capable of moving up and down, wherein the upper cylinder is matched with the inner circumferential surface of the upper guide hole, and the outer circumferential surface of the large cylinder is matched with the inner circumferential surface of the middle guide hole; the upper part of the end head is spherical; a labyrinth seal groove is formed on the lower circumferential surface of the lower cylinder and is matched with the lower inner circumferential surface of the lower guide hole; when the working pressure is smaller than the set pressure, the conical surface of the inverted cone is propped against the valve port of the valve seat; the spring lower cover is composed of a lower cover cylinder and a lower cover edge formed by extending outwards along the radial direction from the lower end edge of the lower cover cylinder, is pressed at the upper end of the gland, and is inwards recessed at the center of the bottom surface to form a pressing hole for inserting the end head; the spring upper cover consists of an upper cover cylinder and an upper cover edge formed by extending outwards along the radial direction from the upper end edge of the upper cover cylinder, and is arranged in the upper valve body, and an opening for placing a steel ball is formed in the center of the top surface in an inward recessed manner; the two ends of the spring are respectively fixed on an upper cover cylinder of the spring upper cover and a lower cover cylinder of the spring lower cover; the middle part of the adjusting bolt is connected in the screw hole of the upper valve body in a threaded way, a round hole for buckling the steel ball is formed at the lower end of the adjusting bolt, and the outer side part of the adjusting bolt is fixed by a nut.
The upper outer circumferential surface of the valve seat is provided with an annular groove along the circumferential direction, and the annular groove is used for arranging a sealing ring and a sealing reinforcing pad so as to ensure good sealing between the valve seat and the lower part of the lower valve body.
The outer circumferential surface of the gland is provided with an annular groove along the circumferential direction, and the annular groove is used for arranging a sealing ring so as to ensure good sealing between the gland and the upper part of the lower valve body.
The inner circumferential surface of the gland is provided with an annular groove along the circumferential direction, and the annular groove is used for arranging a sealing ring so as to ensure good sealing between the gland and the upper cylinder of the valve core.
The pressure regulating overflow valve of the high-pressure pump provided by the invention has the following advantages:
the valve core is provided with a plurality of guide holes for guiding the movement of the valve core, so that the valve core is good in neutrality, the valve core does not deviate in up-and-down movement, the sealing performance is good, and the pressure is stable. The sealing cavity between the valve core and the valve seat can buffer the valve core to a certain extent when the valve core moves up and down, so that the valve core and the valve port can not be strongly impacted when being closed or opened, the noise is small, and the service life is long.
Drawings
Fig. 1 is a cross-sectional perspective view of a longitudinal structure of a pressure regulating relief valve of a high-pressure pump.
Fig. 2 is a longitudinal structural sectional view of a pressure regulating relief valve of a high-pressure pump.
Fig. 3 is a longitudinal structural cross-section of a lower valve body in the pressure-regulating relief valve of the high-pressure pump.
Fig. 4 is a perspective view of a lower valve body of the pressure regulating relief valve of the high-pressure pump.
Fig. 5 is a perspective view of a valve seat in the pressure regulating relief valve of the high-pressure pump.
Fig. 6 is a longitudinal structural sectional view of a valve seat in the pressure regulating relief valve of the high-pressure pump.
Fig. 7 is a perspective view of a valve core in the pressure regulating relief valve of the high-pressure pump.
Fig. 8 is a front view of a valve core in the pressure regulating relief valve of the high-pressure pump.
Fig. 9 is a perspective view of a diversion block in the pressure regulating overflow valve of the high-pressure pump.
Fig. 10 is a longitudinal structural sectional view of a diversion block in the pressure regulating overflow valve of the high-pressure pump.
Fig. 11 is a longitudinal structural sectional view of a middle pressure cover of the pressure regulating relief valve of the high pressure pump.
Fig. 12 is a perspective view of a pressure cover of the pressure regulating relief valve of the high pressure pump.
Fig. 13 is a longitudinal structural sectional view of a spring lower cover in the pressure regulating relief valve of the high-pressure pump.
Fig. 14 is a perspective view of a spring lower cover in the pressure regulating relief valve of the high-pressure pump.
Fig. 15 is a longitudinal structural cross-sectional view of a spring upper cover in the pressure regulating relief valve of the high-pressure pump.
Fig. 16 is a perspective view of a spring top cover in the pressure regulating relief valve of the high pressure pump provided by the invention.
Fig. 17 is a longitudinal structural sectional view of an upper valve body in the pressure regulating relief valve of the high-pressure pump.
Fig. 18 is a schematic diagram of a structure of an adjusting bolt in the pressure-adjusting relief valve of the high-pressure pump.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in fig. 1-18, the pressure regulating overflow valve of the high-pressure pump provided by the invention comprises a lower valve body 1, a valve seat 2, a valve core 3, a flow guide block 4, a gland 5, a spring lower cover 6, a spring 7, a spring upper cover 8, an upper valve body 9, an adjusting bolt 10, a steel ball 11 and a nut 12; wherein, the lower valve body 1 is of a ladder-shaped structure with the upper diameter larger than the lower diameter, the lower port of the central hole is a liquid inlet hole 13, a liquid discharge hole 14 is formed on the upper circumferential wall, and an internal thread is formed on the inner circumferential surface of the upper end part; the upper valve body 9 is in a cover shape, an external thread matched with an internal thread at the upper end part of the lower valve body 1 is formed on the outer circumferential surface of the lower end part, the lower end is connected with the upper end of the lower valve body 1, and a screw hole 15 is formed at the center part of the top surface; the valve seat 2 is arranged in the lower valve body 1 and is of a T-shaped structure, a lower guide hole 16 is formed in the center of the top surface in a downward sinking mode, the upper port is a valve port 17, and a liquid inlet 18 is formed in the lower circumferential wall; the lower part of the valve seat 2 is inserted and fixed in the lower part of the central hole of the lower valve body 1, and the liquid inlet 18 is communicated with the liquid inlet hole 13 on the lower valve body 1; the flow guide block 4 is annular, the lower part is sleeved on the outer circumferential surface of the upper part of the valve seat 2, a plurality of flow through holes 19 are formed in the middle circumferential wall at intervals along the circumferential direction, the flow through holes 19 correspond to the liquid discharge holes 14 in the lower valve body 1 in position, the central hole of the flow guide block 4 is a middle guide hole 20, and a groove 21 is formed in the edge of the upper end; the gland 5 is also annular and is arranged at the upper end of the guide block 4, the outer circumferential surface is fixed on the inner circumferential surface of the lower valve body 1, which is positioned at the upper part of the liquid discharge hole 14, the central hole is called an upper guide hole 27, and the space surrounded by the lower valve body 1, the guide block 4 and the gland 5 is called an unloading cavity; the valve core 3 is composed of a head 22, an upper cylinder 23, a large cylinder 24, an inverted cone 25 and a lower cylinder 26 which are sequentially connected from top to bottom, and is arranged in the upper guide hole 27, the middle guide hole 20 and the lower guide hole 16 in a manner of being capable of moving up and down, wherein the upper cylinder 23 is matched with the inner circumferential surface of the upper guide hole 27, and the outer circumferential surface of the large cylinder 24 is matched with the inner circumferential surface of the middle guide hole 20; the upper part of the end head 22 is spherical; a labyrinth seal groove is formed on the lower circumferential surface of the lower cylinder 26 and is matched with the lower inner circumferential surface of the lower guide hole 16; when the working pressure is smaller than the set pressure, the conical surface of the inverted cone 25 is propped against the valve port 17 of the valve seat 2; the spring lower cover 6 is composed of a lower cover cylinder 28 and a lower cover edge 29 formed by extending outwards along the radial direction from the lower end edge of the lower cover cylinder 28, is pressed at the upper end of the gland 5, and is inwards recessed at the center of the bottom surface to form a pressing hole 30 for inserting the end head 22; the spring upper cover 8 is composed of an upper cover cylinder 31 and an upper cover edge 32 formed by extending outwards along the radial direction from the upper end edge of the upper cover cylinder 31, and is arranged in the upper valve body 9, and an opening 33 for placing the steel ball 11 is formed in the center of the top surface in an inward recessed manner; both ends of the spring 7 are respectively fixed on an upper cover cylinder 31 of the spring upper cover 8 and a lower cover cylinder 28 of the spring lower cover 6; the middle part of the adjusting bolt 10 is connected in the screw hole 15 of the upper valve body 9 in a threaded way, a round hole 34 for buckling the steel ball 11 is formed at the lower end, and the outer part is fixed by a nut 12.
The upper outer circumferential surface of the valve seat 2 is provided with an annular groove along the circumferential direction, and the annular groove is used for arranging a sealing ring and a sealing reinforcing pad so as to ensure good sealing between the valve seat 2 and the lower part of the lower valve body 1.
An annular groove is formed on the outer circumferential surface of the gland 5 along the circumferential direction and is used for arranging a sealing ring so as to ensure good sealing between the gland 5 and the upper part of the lower valve body 1.
An annular groove is formed on the inner circumferential surface of the gland 5 along the circumferential direction and is used for arranging a sealing ring so as to ensure good sealing between the gland 5 and the upper cylinder 23 of the valve core 3.
The working principle of the pressure regulating relief valve of the high-pressure pump provided by the invention is explained as follows:
firstly, a liquid inlet hole 13 on a lower valve body 1 is connected to a high-pressure pipeline, when the liquid pressure in the high-pressure pipeline is smaller than a pressure set value, the conical surface of an inverted cone 25 of a valve core 3 on a pressure-regulating overflow valve of the high-pressure pump tightly props against a valve port 17 on a valve seat 2 under the action of the elastic force of a spring 7, so that the valve port 17 is closed; when the liquid pressure exceeds the set pressure value, the high-pressure liquid flowing into the inner cavity of the valve seat 2 from the liquid inlet hole 13 on the lower valve body 1 through the liquid inlet hole 18 on the valve seat 2 will overcome the spring force of the spring 7 to push the valve core 3 upwards along the valve seat 2, the flow guiding block 4 and the guide hole on the gland 5, thereby the conical surface of the inverted cone 25 leaves the valve port 17 on the valve seat 2, at this time, the high-pressure liquid will enter the inside of the flow guiding block 4 from the valve port 17, then enter the unloading cavity through the overflow hole 19 and the opening 21 on the flow guiding block 4, and finally be discharged outwards through the liquid discharging hole 14 on the lower valve body 1 to release pressure. After the liquid pressure in the high-pressure pipeline is reduced to a set value, the valve core 3 is buffered and falls back onto the valve seat 2 under the action of the spring force of the spring 7, and finally the valve port 17 is closed, so that the system maintains the set pressure value. In addition, a sealing cavity is formed between the valve core 3 and the lower end of the lower guide hole 16 of the valve seat 2, and when the valve core 3 moves up and down, air in the sealing cavity plays a certain role in buffering the movement of the valve core 3, so that the valve core 3 cannot directly strike the valve seat 2, noise can be reduced, and the service life can be prolonged. In addition, the spherical surface of the upper end of the tip 22 can be pressed against the spring lower cover 6, which facilitates torque transmission. The elastic force of the spring 7 can be adjusted through the tightness of the adjusting bolt 10, so that the moment is transmitted to the spring 7 through the upper spring cover 8, the lower spring cover 6 presses the valve core 3, and the valve port 17 is closed. The torque is transmitted between the spring upper cover 9 and the adjusting bolt 10 by adopting the steel ball 11, so that the operation is convenient. The three guide holes have the functions of ensuring that the valve core 3 moves to be neutral, the sealing performance is reliable, and the working pressure is stable.

Claims (2)

1. The utility model provides a high-pressure pump pressure regulating overflow valve which characterized in that: the high-pressure pump pressure regulating overflow valve comprises a lower valve body (1), a valve seat (2), a valve core (3), a flow guide block (4), a gland (5), a spring lower cover (6), a spring (7), a spring upper cover (8), an upper valve body (9), an adjusting bolt (10), a steel ball (11) and a nut (12); the lower valve body (1) is of a stepped structure, the upper diameter of the lower valve body is larger than the lower diameter of the lower valve body, the lower port of the central hole is a liquid inlet hole (13), a liquid discharge hole (14) is formed in the circumferential wall of the upper part, and internal threads are formed on the inner circumferential surface of the upper end part; the upper valve body (9) is in a cover shape, an external thread matched with an internal thread at the upper end part of the lower valve body (1) is formed on the outer circumferential surface of the lower end part, the lower end is connected with the upper end of the lower valve body (1), and a screw hole (15) is formed at the center part of the top surface; the valve seat (2) is arranged in the lower valve body (1) and is of a nail-shaped structure, a lower guide hole (16) is formed in the center of the top surface in a downward sinking mode, the upper port is a valve port (17), and a liquid inlet (18) is formed in the circumferential wall of the lower portion; the lower part of the valve seat (2) is inserted and fixed in the lower part of the central hole of the lower valve body (1), and the liquid inlet (18) is communicated with the liquid inlet (13) on the lower valve body (1); the guide block (4) is annular, the lower part of the guide block is sleeved on the outer circumferential surface of the upper part of the valve seat (2), a plurality of overflow holes (19) are formed in the middle circumferential wall at intervals along the circumferential direction, the overflow holes (19) correspond to the liquid discharge holes (14) in the lower valve body (1), the central hole of the guide block (4) is a middle guide hole (20), and a groove (21) is formed in the edge of the upper end; the gland (5) is also annular and is arranged at the upper end of the guide block (4), the outer circumferential surface of the gland is fixed on the inner circumferential surface of the lower valve body (1) which is positioned at the upper part of the liquid discharge hole (14), the central hole is called an upper guide hole (27), and a space surrounded by the lower valve body (1), the guide block (4) and the gland (5) is called an unloading cavity; the valve core (3) is composed of an end head (22), an upper cylinder (23), a large cylinder (24), an inverted cone (25) and a lower cylinder (26) which are sequentially connected from top to bottom, and is arranged in the upper guide hole (27), the middle guide hole (20) and the lower guide hole (16) in a manner of being capable of moving up and down, wherein the upper cylinder (23) is matched with the inner circumferential surface of the upper guide hole (27), and the outer circumferential surface of the large cylinder (24) is matched with the inner circumferential surface of the middle guide hole (20); the upper part of the end head (22) is spherical; a labyrinth seal groove is formed on the lower circumferential surface of the lower cylinder (26) and is matched with the lower inner circumferential surface of the lower guide hole (16); when the working pressure is smaller than the set pressure, the conical surface of the inverted cone (25) is propped against the valve port (17) of the valve seat (2); the spring lower cover (6) is composed of a lower cover cylinder (28) and a lower cover edge (29) formed by extending outwards along the radial direction from the lower end edge of the lower cover cylinder (28), is pressed at the upper end of the pressing cover (5), and a pressing hole (30) for inserting the end socket (22) is formed in the center of the bottom surface in an inward concave manner; the spring upper cover (8) is composed of an upper cover cylinder (31) and an upper cover edge (32) formed by extending outwards along the radial direction from the upper end edge of the upper cover cylinder (31), and is arranged in the upper valve body (9), and an opening (33) for placing the steel ball (11) is formed by recessing inwards at the center of the top surface; the two ends of the spring (7) are respectively fixed on an upper cover cylinder (31) of the spring upper cover (8) and a lower cover cylinder (28) of the spring lower cover (6); the middle part of the adjusting bolt (10) is connected in a screw hole (15) of the upper valve body (9) in a threaded way, a round hole (34) for buckling the steel ball (11) is formed at the lower end, and the outer side part is fixed by a nut (12);
an annular groove is formed on the outer circumferential surface of the upper part of the valve seat (2) along the circumferential direction and is used for arranging a sealing ring and a sealing reinforcing pad so as to ensure good sealing between the valve seat (2) and the lower part of the lower valve body (1);
an annular groove is formed on the outer circumferential surface of the gland (5) along the circumferential direction and is used for arranging a sealing ring so as to ensure that the gland (5) and the upper part of the lower valve body (1) are well sealed.
2. The high pressure pump pressure regulating relief valve according to claim 1, wherein: an annular groove is formed on the inner circumferential surface of the gland (5) along the circumferential direction and is used for arranging a sealing ring so as to ensure good sealing between the gland (5) and the upper cylinder (23) of the valve core (3).
CN201910503096.6A 2019-06-11 2019-06-11 Pressure regulating overflow valve of high-pressure pump Active CN110159811B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910503096.6A CN110159811B (en) 2019-06-11 2019-06-11 Pressure regulating overflow valve of high-pressure pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910503096.6A CN110159811B (en) 2019-06-11 2019-06-11 Pressure regulating overflow valve of high-pressure pump

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CN110159811A CN110159811A (en) 2019-08-23
CN110159811B true CN110159811B (en) 2024-01-26

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792819B (en) * 2019-11-15 2021-07-13 兴伟阀门集团有限公司 Rotary stop valve
CN112145764B (en) * 2020-09-22 2022-05-06 台州市大乘汽车保养设备有限公司 Pressure relief joint applied to high-pressure cleaning machine
CN115263707A (en) * 2022-07-13 2022-11-01 德帕姆(杭州)泵业科技有限公司 Backflow type leakage-free plunger metering pump

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CN2480640Y (en) * 2001-06-01 2002-03-06 李忠芳 Float ball type gas valve
CN104019258A (en) * 2014-06-26 2014-09-03 华中科技大学无锡研究院 Double-damping direct-acting type hydraulic pressure overflowing valve
CN105650314A (en) * 2016-04-18 2016-06-08 黄幼华 Self-operated type pressure stabilizing balance valve
CN106015675A (en) * 2016-07-07 2016-10-12 天津市海盛泵业制造有限公司 One-way pressure regulating overflow valve with thrust bearing
CN205806597U (en) * 2016-07-07 2016-12-14 天津市海盛泵业制造有限公司 A kind of one-way pressure-regulating overflow valve of band thrust bearing

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Publication number Priority date Publication date Assignee Title
ATE265755T1 (en) * 1997-10-04 2004-05-15 Z & D Ltd LINEAR MOTOR COMPRESSOR

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2480640Y (en) * 2001-06-01 2002-03-06 李忠芳 Float ball type gas valve
CN104019258A (en) * 2014-06-26 2014-09-03 华中科技大学无锡研究院 Double-damping direct-acting type hydraulic pressure overflowing valve
CN105650314A (en) * 2016-04-18 2016-06-08 黄幼华 Self-operated type pressure stabilizing balance valve
CN106015675A (en) * 2016-07-07 2016-10-12 天津市海盛泵业制造有限公司 One-way pressure regulating overflow valve with thrust bearing
CN205806597U (en) * 2016-07-07 2016-12-14 天津市海盛泵业制造有限公司 A kind of one-way pressure-regulating overflow valve of band thrust bearing

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