CN219345116U

CN219345116U - Leakage-free plug-in type hydraulic control one-way valve

Info

Publication number: CN219345116U
Application number: CN202223384161.4U
Authority: CN
Inventors: 任建颖; 杨晓东; 窦建培; 郭行; 赵考; 周丽琴; 王杨军; 欧海楠
Original assignee: Beijing Huade Hydraulic Industrial Group Co ltd
Current assignee: Beijing Huade Hydraulic Industrial Group Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-07-14
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to a leakage-free plug-in type hydraulic control one-way valve, which consists of a cover plate, a valve core assembly and an O-shaped ring, wherein the valve core assembly is integrally arranged in an inner hole of the cover plate, and the valve core assembly consists of a control piston, a spring, a valve sleeve and a valve core. The valve core is arranged in the inner hole of the valve sleeve, the bottom end of the control piston is connected with the tail end of the valve core through threads, the spring is pressed on the supporting surface of the valve sleeve, and line sealing is formed at the joint of the sealing conical surface at the bottom of the valve core and the sealing edge of the valve sleeve. The utility model realizes absolute seal protection of pressure oil liquid, thereby improving adaptability to various working conditions. The valve has the advantages of compact structure, no leakage, reliable closing performance, small pressure loss, large flow, convenient installation and maintenance and the like.

Description

Leakage-free plug-in type hydraulic control one-way valve

Technical Field

The utility model relates to a hydraulic control one-way valve in the hydraulic field, in particular to a leakage-free plug-in type hydraulic control one-way valve.

Background

The hydraulic control one-way valve has simple structure and working principle and good one-way tightness, and is widely applied to circuits such as balance, pressure maintaining, locking, oil supplementing and the like.

Most of the existing hydraulic control check valves are assembled by accessories, have leakage phenomenon, have small flow, have large hydraulic impact during unloading, have lower service lives of all parts and whole parts of the valve, and can not meet the requirements of metallurgical industry and military industry on no leakage, high reliability and long service life of the hydraulic control check valve.

In addition, the assembly type hydraulic control one-way valve brings a plurality of inconveniences to maintenance and replacement under complex and harsh environments and special conditions, and is easy to have installation errors, so that the maintenance efficiency of the hydraulic system is lower.

In view of the defects of the prior hydraulic control one-way valve, the designer is continuously researched and designed, and the utility model with practical value is finally created after repeated trial and improvement.

Disclosure of Invention

The utility model aims to overcome the defects of leakage and low reliability of the existing hydraulic control check valve, and provides a leakage-free plug-in type hydraulic control check valve with a novel structure, which aims to solve the technical problems of leakage prevention, reliable closing performance, small pressure loss and large flow, thereby being more suitable for practical use.

The utility model further aims to provide the leakage-free plug-in type hydraulic control one-way valve, which aims to solve the technical problems that the structure is compact, the installation and the maintenance are convenient, and the leakage-free plug-in type hydraulic control one-way valve can adapt to complex environmental factors, so that the leakage-free plug-in type hydraulic control one-way valve is more practical.

1. The valve core assembly is integrally inserted into a valve body corresponding to a working system, and the cover plate is connected with the valve body through the bolts, so that the valve has the advantages of compact structure, no leakage, reliable closing performance, small pressure loss, large flow, convenience in installation and maintenance, capability of adapting to complex environmental factors and the like, and the performance of the valve completely meets various application conditions of metallurgical industry and military industry.

2. In the working process of the hydraulic control one-way valve, each leakage point is provided with a sealing protection scheme, and the sealing protection scheme comprises static sealing and dynamic sealing, and comprises piston sealing, piston rod sealing, radial sealing and axial sealing. Based on each sealing protection scheme, the integral sealing scheme aiming at the structural characteristics and the working characteristics of the plug-in type hydraulic control one-way valve ensures no leakage.

3. In the implementation process of the technical scheme of the utility model, each leakage point is designed with a sealing scheme, and the secondary static seal of the dynamic seal leakage oil is realized through secondary sealing. The static seal can realize absolute seal protection of pressure oil, so that the hydraulic control one-way valve can realize no leakage under the use condition, and the adaptability of the harsh requirement working condition on the environmental cleaning degree is improved.

The aim of the utility model and the technical problems are solved by adopting the following technical proposal. The utility model provides a leakage-free plug-in type hydraulic control one-way valve, which consists of a cover plate, a valve core assembly and O-shaped rings of various specifications and types, wherein the valve core assembly is integrally arranged in an inner hole of the cover plate. The valve core assembly consists of a control piston, a spring, a valve sleeve and a valve core, wherein the valve core is arranged in the valve sleeve, the bottom end of the control piston is connected with the tail end of the valve core through threads, the spring is pressed on a supporting surface of the valve sleeve, and line sealing is formed at the joint of a sealing conical surface at the bottom of the valve core and a sealing edge line of the valve sleeve. And a dynamic seal is arranged at each sliding pair, a secondary static seal is arranged for the dynamic seal leakage point, and static seals are arranged at other leakage points.

Further, the O-ring comprises a sixth O-ring, wherein a dynamic seal sixth O-ring is provided at the sliding pair between the control piston and the cover plate bore, forming a piston rod seal.

Further, the O-shaped ring also comprises a third O-shaped ring and a fourth O-shaped ring, and the upper side and the lower side of the outer cylindrical surface of the valve sleeve are respectively provided with the third O-shaped ring and the fourth O-shaped ring of static seal to form piston seal.

Further, the O-ring also comprises a first O-ring, and a second static seal is arranged at the matching position of the valve sleeve and the inner hole of the cover plate to form a piston seal.

Further, the O-shaped ring also comprises a second O-shaped ring, and a dynamic seal second O-shaped ring is arranged at the position of the inner hole of the valve sleeve and the sliding pair of the valve core to form a piston rod seal.

The hydraulic valve further comprises an oil port and an oil way, wherein the oil port comprises an oil port A, an oil port B, an oil port X and an oil port Y, wherein the oil port A is positioned in the middle of the lower end face of the valve sleeve, the oil port B is positioned in the middle of the side wall of the valve sleeve, and the oil port X and the oil port Y are respectively positioned on two sides of the lower installation end face of the cover plate;

the oil port A to the oil port B and the oil port B to the oil port A can respectively form a main conduction oil path, the bottom end from the oil port X to the control piston is a control oil path, and the spring cavity to the oil port Y of the spring is an outward discharge oil path and can be collected in an outward connection way;

the O-shaped ring also comprises a fifth O-shaped ring, and static sealing fifth O-shaped rings are respectively arranged at the connecting channels of the X oil port and the Y oil port of the mounting end face under the cover plate to form axial sealing.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It has at least the following advantages:

according to the utility model, the dynamic seal is arranged at each sliding pair, the secondary static seal is arranged for the dynamic seal leakage point, and the static seal is designed for other leakage points, so that absolute seal protection of pressure oil is realized, and the adaptability to various working conditions is improved. The valve has the advantages of compact structure, no leakage, reliable closing performance, small pressure loss, large flow, convenient installation and maintenance and the like.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the installation of the present utility model.

FIG. 2A is a schematic diagram of the structure of the present utility model.

FIG. 2B is a schematic top view of the structure of the present utility model.

Wherein:

1: cover plate 2: control piston

3: spring 4: first O-ring

5: valve housing 6: second O-ring

7: valve core 8': third O-ring

8: fourth O-ring 9: fifth O-ring

10: sixth O-ring

11: connecting block

A oil port B oil port

X-oil port and Y-oil port

Detailed Description

In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of a leak-free plug-in type hydraulic control one-way valve according to the utility model with reference to the accompanying drawings and the preferred embodiment.

Referring to fig. 1, 2A and 2B, a leak-free plug-in hydraulic check valve according to a preferred embodiment of the present utility model mainly includes: the valve core assembly is integrally arranged in an inner hole of the cover plate 1. The valve core assembly consists of a control piston 2, a spring 3, a valve sleeve 5 and a valve core 7. The valve core 7 is arranged in the valve sleeve 5, the bottom end of the control piston 2 is connected with the tail end of the valve core 7 through threads, the spring 3 is pressed on the supporting surface of the valve sleeve 5, a line seal is formed at the joint of the sealing conical surface at the bottom of the valve core 7 and the sealing edge line of the valve sleeve 5, a dynamic seal is arranged at each sliding pair, a secondary static seal is arranged for the dynamic seal leakage point, and a static seal is arranged at each other leakage point.

Further, the hydraulic fluid pump further comprises an oil port and an oil way, wherein the oil port comprises an oil port A, an oil port B, an oil port X and an oil port Y, wherein the oil port A is positioned in the middle of the lower end face of the valve sleeve 5, the oil port B is positioned in the middle of the side wall of the valve sleeve 5, and the oil port X and the oil port Y are respectively positioned on two sides of the lower installation end face of the cover plate 1.

The oil port A to the oil port B and the oil port B to the oil port A can respectively form a main conduction oil way, the bottom end from the oil port X to the control piston 2 is a control oil way, and the spring cavity of the spring 3 to the oil port Y is an outer discharge oil way and can be collected in an outer connection way.

The specific sealing scheme of the leakage point is as follows:

1. when the working conditions are as follows: the pressure oil acts on the stress surface of the valve core 7 through the oil port B, when the pressure is 35MPa at most, the leakage point 1 is a fit clearance between the outer cylindrical surface on the upper side of the valve sleeve 5 and the inner hole of the connecting block 11, the leakage point 2 is a sliding fit clearance between the valve core 7 and the inner hole of the valve sleeve 5, and at the moment, the following sealing scheme is adopted:

(1) sealing scheme 1: a third O-ring 8' for static sealing is arranged on the upper side of the outer cylindrical surface of the valve sleeve 5 to form a piston seal. The third O-shaped ring 8' is made of fluororubber with the hardness of 90, so that the anti-aging and high-temperature-resistant effects can be realized, and the special and harsh application environment requirements of the industries such as metallurgy, military industry and the like can be met.

(2) Sealing scheme 2: a second O-shaped ring 6 for dynamic seal is arranged at the position where the inner hole of the valve sleeve 5 and the valve core 7 form a sliding pair, so that piston rod seal is formed.

In the process of opening and closing the valve core 7, the valve core reciprocates up and down under the guiding action of the inner hole of the valve sleeve 5. Due to high frequency and long-time friction, the second O-shaped ring 6 is deformed and worn at a certain high temperature and aged, so that a certain leakage amount is generated, and leaked oil can enter the containing cavity of the spring 3 along the clearance of the sliding pair. Based on the dynamic seal characteristics, absolute sealing of pressure oil cannot be realized, so that static sealing is also needed.

2. When the working conditions are as follows: the pressure oil acts on the bearing surface under the valve core 7 through the oil port A, when the pressure is 35MPa at the highest, the leakage point 3 is a fit clearance between the outer cylindrical surface at the lower side of the valve sleeve 5 and the inner hole of the connecting block 11, and the adopted sealing scheme 3 is that a fourth O-shaped ring 8 for static sealing is arranged at the lower side of the outer cylindrical surface of the valve sleeve 5 to form piston sealing.

3. Under the working condition described in item 2, the control pressure oil enters the upper end face of the control piston 2 through the oil port X, when the pressure is 15MPa at most, the leakage point 4 is at the sliding fit clearance between the inner hole of the cover plate 1 and the control piston 2, the adopted sealing scheme 4 is that a dynamic seal sixth O-shaped ring 10 is arranged at the sliding pair formed between the inner hole of the cover plate 1 and the control piston 2, and the piston rod seal is formed.

The piston 2 is controlled to reciprocate up and down along the inner hole of the cover plate 1, and due to high-frequency and long-time friction, the sixth O-shaped ring 10 is deformed and worn at a certain high temperature and aged, so that a certain leakage amount is generated, and leaked oil can enter the containing cavity of the spring 3 along the sliding pair clearance. Based on the dynamic seal characteristics, absolute sealing of pressure oil cannot be realized, so that static sealing is also needed.

4. Under the working conditions 1- (2) and 3, the dynamic seal arranged at the position where the inner hole of the valve sleeve 5 and the valve core 7 form a sliding pair and the dynamic seal arranged at the position where the inner hole of the cover plate 1 and the control piston 2 form a sliding pair have leakage oil. The leakage point 5 is the leakage oil generated by the dynamic seal at the two positions, and leaks or permeates into the environment through the fit clearance between the outer cylindrical surface at the uppermost side of the valve sleeve 5 and the inner hole of the cover plate 1 and the clearance between the cover plate 1 and the installation end surface of the connecting block 11.

The adopted sealing scheme 5 is that a first O-shaped ring 4 for secondary static seal is arranged at the matching position of the valve sleeve 5 and the inner hole of the cover plate 1 to form piston seal. In the normal working process, even once two dynamic seals fail, oil does not leak through a gap between the cover plate 1 and the installation end face of the connecting block 11, so that absolute sealing of pressure oil is realized.

5. As described in the above description 4, with reference to fig. 1, 2A and 2B, the leakage oil generated by the dynamic seal at two positions is led out of the valve body and recovered by providing the oil port Y.

6. From the working conditions described in 3 and 5 above, as shown in fig. 1, 2A and 2B, the leak points 6 are respectively present at the connection channel of the control oil port X and the connection channel of the outer oil drain port Y at the mounting end surfaces of the cover plate 1 and the connection block 11.

The adopted sealing scheme 6 is that a fifth O-shaped ring 9 for static sealing is respectively arranged at the connecting channel of an X oil port and a Y oil port of the mounting end face under the cover plate 1 to form axial sealing so as to prevent pressure oil from leaking through a gap between the cover plate 1 and the mounting end face of the connecting block 11 and realize absolute sealing of the pressure oil.

The O-ring is an extrusion type seal, and the seal member is elastically deformed to form a contact pressure on the seal contact surface, so that no leakage occurs due to the contact pressure being larger than the internal pressure of the medium to be sealed.

When the utility model is used for designing each sealing scheme and selecting the O-shaped ring, the groove size and tolerance of each O-shaped ring are strictly selected according to the standards of corresponding samples and manuals, and the stretching amount and the compression rate of the O-shaped ring are checked and calculated and are in the corresponding standard range.

Referring to fig. 1, a leak-free plug-in hydraulic control check valve mainly includes: the valve comprises a cover plate 1, a valve core assembly and O-shaped rings of various specifications and types, wherein the valve core assembly consists of a control piston 2, a spring 3, a valve sleeve 5 and a valve core 7.

The sixth O-shaped ring 10 is installed in an inner hole groove of the cover plate 1, the first O-shaped ring 4 and the fourth O-shaped ring 8 are respectively installed in an outer cylindrical surface groove of the valve sleeve 5, the valve core assembly is assembled with the cover plate 1, and finally the fifth 0-shaped ring 9 is installed in an end surface groove of the cover plate 1.

After the second O-shaped ring 6 is arranged in the groove of the inner hole of the valve sleeve 5, the valve core 7 is pressed into the inner hole of the valve sleeve 5 from the lower end surface of the valve sleeve 5 to the limit according to the direction shown in figure 2A, namely, the line seal is formed at the joint of the sealing conical surface of the valve core 7 and the sealing edge line of the valve sleeve 5. The spring 3 is installed on the upper supporting surface of the valve sleeve 5 in the direction shown in fig. 2A, and the control piston 2 is screwed into the tail end thread of the valve core 7, at this time, the control piston 2 compresses the spring 3 to generate a certain precompression amount, namely the valve core assembly is the whole.

During actual installation, the plug-in type hydraulic control one-way valve is required to be inserted into the inner cavity of the connecting block 11 and is connected and fastened by screws.

As shown in fig. 1, 2A and 2B, when the pressure oil is introduced into the port B, the free conduction oil path is formed from the port B to the port a without introducing the control pressure oil, and at this time, no leakage oil is formed at the sliding pair between the control piston 2 and the inner hole of the cover plate 1.

As shown in fig. 1 and 2A, when the pressure oil is introduced into the port a, the pressure oil is required to be introduced into the port X alone, and the pressure oil acts on the upper end surface of the control piston 2 to move the valve element 7 downward, so that the valve port is opened, and at this time, the port a to the port B form a conductive oil path. At this time, if oil leaks from the sliding pair formed by the inner hole of the valve sleeve 5, the valve core 7, the control piston 2 and the inner hole of the cover plate 1, the oil can be discharged and collected from the spring cavity to the Y oil port.

When the pressure oil acts on the stress surface of the valve core 7 through the oil port B, the generated hydraulic pressure enables the valve core 7 to move against the spring force of the spring 3, the valve port is opened, and the oil port B is communicated with the oil port A. When pressure oil acts on the stress surface of the valve core 7 through the oil port A, the valve port is closed by hydraulic pressure generated by the pressure oil; under the working condition, the oil port X is communicated with control oil, and when the pressure of the control oil reaches the design pressure ratio of the hydraulic control one-way valve, the valve port is opened, and the oil ports A to B are communicated. The oil port Y is an outer oil discharge port oil through tank.

The working principle of the utility model is as follows:

(1) the pressure oil acts on the stress surface of the valve core 7 through the oil port B, the downward hydraulic pressure generated by the pressure oil acts on the valve core 7 to drive the control piston 2 to compress the spring 3, the pressure oil moves downwards relative to the valve sleeve 5, and the valve port is opened; after the oil port B is free of pressure oil, the valve core 7 is reset under the action of the spring force of the spring 3, and the valve port is closed.

(2) The pressure oil acts on the stress surface of the valve core 7 through the oil port A, and the upward hydraulic pressure generated by the pressure oil acts on the sealing conical surface of the valve core 7 to be pressed on the sealing edge line of the valve sleeve 5 upwards, so that the valve port is closed; under the working condition, control oil is communicated through the oil port X and acts on the upper end of the control piston 2, the downward hydraulic pressure generated by the control oil port X pushes the control piston 2 to slide downwards along the inner hole of the cover plate 1 so as to compress the spring 3 downwards, and simultaneously pushes the valve core 7 to overcome the hydraulic pressure action of the oil port A and move downwards relative to the valve sleeve 5, so that the valve port is opened; after the oil port X is free from pressure oil, the valve core 7 is reset under the action of spring force, and the valve port is closed. The oil port Y is an outer oil discharge port oil through tank.

In the implementation process of the utility model, each leakage point is designed with a sealing scheme, and the secondary static seal of the dynamic seal leakage oil is realized through secondary sealing. By means of the overall sealing scheme, the static seal can realize absolute sealing protection of pressure oil, so that the hydraulic control one-way valve can be free of leakage under the use condition, and the adaptability of the harsh requirement working condition on the environmental cleanliness is improved.

Therefore, the O-shaped ring can fully exert the sealing function, the reliability and the service life of the O-shaped ring completely meet the design expectations, and the leakage-free hydraulic control one-way valve can be realized only by assembling according to the specification.

The present utility model is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the utility model.

Claims

1. The utility model provides a no leakage cartridge formula hydraulically controlled check valve which characterized in that: the valve core assembly is integrally installed in an inner hole of the cover plate (1), and consists of a control piston (2), a spring (3), a valve sleeve (5) and a valve core (7), wherein the valve core (7) is installed in the valve sleeve (5), the bottom end of the control piston (2) is in threaded connection with the tail end of the valve core (7), the spring (3) is tightly pressed on a supporting surface of the valve sleeve (5), a linear seal is formed at the joint of a sealing conical surface at the bottom of the valve core (7) and a sealing edge line of the valve sleeve (5), a dynamic seal is arranged at each sliding pair, a secondary static seal is arranged for each dynamic seal leakage point, and static seals are arranged at other leakage points.

2. The leak-free plug-in hydraulic check valve according to claim 1, wherein: the O-shaped ring comprises a sixth O-shaped ring (10), wherein a dynamic seal sixth O-shaped ring (10) is arranged at a sliding pair between the control piston (2) and the inner hole of the cover plate (1) to form a piston rod seal.

3. The leak-free plug-in hydraulic check valve according to claim 1, wherein: the O-shaped ring also comprises a third O-shaped ring (8 ') and a fourth O-shaped ring (8), and the third O-shaped ring (8') and the fourth O-shaped ring (8) are respectively arranged on the upper side and the lower side of the outer cylindrical surface of the valve sleeve (5) to form a piston seal.

4. The leak-free plug-in hydraulic check valve according to claim 1, wherein: the O-shaped ring also comprises a first O-shaped ring (4), and the first O-shaped ring (4) for secondary static seal is arranged at the matching position of the valve sleeve (5) and the inner hole of the cover plate (1) to form piston seal.

5. The leak-free plug-in hydraulic check valve according to claim 1, wherein: the O-shaped ring also comprises a second O-shaped ring (6), and a dynamic sealing second O-shaped ring (6) is arranged at the sliding pair position of the inner hole of the valve sleeve (5) and the valve core (7) to form a piston rod seal.

6. The leak-free plug-in hydraulic check valve according to claim 1, wherein: the hydraulic valve further comprises an oil port and an oil way, wherein the oil port comprises an oil port A, an oil port B, an oil port X and an oil port Y, wherein the oil port A is positioned in the middle of the lower end face of the valve sleeve (5), the oil port B is positioned in the middle of the side wall of the valve sleeve (5), and the oil port X and the oil port Y are respectively positioned on two sides of the lower installation end face of the cover plate (1);

the oil port A to the oil port B and the oil port B to the oil port A can respectively form a main conduction oil way, the bottom end from the oil port X to the control piston (2) is a control oil way, and the oil port from the spring cavity of the spring (3) to the oil port Y is an outer discharge oil way and can be collected in an outer connection way;

the O-shaped ring also comprises a fifth O-shaped ring (9), and the connecting channels of the X oil port and the Y oil port of the end face are respectively provided with the fifth O-shaped ring (9) for static seal under the cover plate (1) to form axial seal.