CN212297772U

CN212297772U - High-pressure one-way valve

Info

Publication number: CN212297772U
Application number: CN202020486410.2U
Authority: CN
Inventors: 何光明; 葛永文; 梁洪斌
Original assignee: Sichuan Kuangteng Nano Technology Co ltd
Current assignee: Sichuan Kuangteng Nano Technology Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-01-05
Anticipated expiration: 2030-04-07

Abstract

The utility model relates to a high pressure check valve, which comprises an outer shell, sealed post, the regulating block, spring and sealing washer, open along its axial in the inside of shell has the passageway, the middle part of passageway is provided with the guiding hole, sealed post includes integrated into one piece and coaxial direction head and lower step, it has a plurality of wax groove A that flow to open along its axial on the outer wall of direction head, it has a plurality of wax groove B that flow to open along its axial on the outer wall of spring mounting hole, the direction head stretches into in the guiding hole, the sealing washer is installed in the annular cavity that seal ring groove A and seal ring groove B formed, the regulating block passes through screw-thread fit with the lower extreme of shell and is connected, the spring is equipped with in the spring mounting hole. The utility model has the advantages that: the guide structure is arranged, so that the relative movement precision of the sealing column and the shell is high, and the reverse sealing performance is good; the relative position of the adjusting block and the shell can be adjusted, so that the working pressure can be adjusted, and the one-way conduction of different working environments can be adapted.

Description

High-pressure one-way valve

Technical Field

The utility model relates to the technical field of valves, especially a high pressure one-way valve.

Background

The one-way valve is characterized in that fluid can only flow along the water inlet, and the medium at the water outlet cannot flow back. Check valves are also known as check valves or check valves.

The existing one-way valve has the defect of low moving precision of moving parts, and the airtightness of the existing one-way valve can be influenced. And usually set up the sealing washer on the sealed face, when backpressure was too big, the sealing washer atress was too big, leads to the sealing washer impaired easily, also can influence its leakproofness.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a high pressure check valve.

The purpose of the utility model is realized through the following technical scheme:

a high-pressure one-way valve comprises a shell, a sealing column, an adjusting block, a spring and a sealing ring, wherein a channel is formed in the shell along the axial direction of the shell, a guide hole is formed in the middle of the channel, the inner diameter of the guide hole is smaller than that of the channel, the lower end face of the guide hole is an upper step, a sealing ring groove A is formed in the inner side of the upper step, internal threads are formed in the inner wall of the lower end of the channel, the sealing column comprises an integrally formed and coaxial guide head and a lower step, a spring mounting hole is formed below the lower step, a plurality of wax flowing grooves A are formed in the outer wall of the guide head along the axial direction of the guide head, a plurality of wax flowing grooves B are formed in the outer wall of the spring mounting hole along the axial direction of the outer wall of the spring mounting hole, a sealing ring groove B is formed in the upper surface of the lower step, the guide head extends into the guide hole, the sealing ring is mounted in an, the outer wall of regulating block is provided with the external screw thread, the regulating block passes through screw-thread fit with the lower extreme of shell and is connected, be equipped with the spring in the spring mounting hole, the upper end butt of spring is on the top surface of spring mounting hole, and the lower extreme butt is in the central point of regulating block department.

Furthermore, clearance fit is formed between the guide head and the guide hole.

Further, the inner diameter of the upper step is smaller than the outer diameter of the lower step.

The utility model has the advantages of it is following:

1. the utility model discloses a be provided with guide structure, the relative movement precision of sealed post and shell is high, and reverse leakproofness is good.

2. The utility model discloses can adjust the relative position of adjusting block and shell to the realization is adjusted operating pressure, adaptable different operational environment's one-way switch on.

3. The utility model discloses be provided with the last step of the excessive upward movement of restriction sealing post, set up the lower step that corresponds with the last step on sealing post, when reverse effort is too big, the sealing washer receives to extrude after the certain degree, and lower step butt can prevent that the sealing washer from damaging because of the atress is too big on last step, can also ensure simultaneously that the sealing washer remains airtight state all the time.

Drawings

FIG. 1 is a sectional view of the assembly structure of the present invention;

fig. 2 is a cross-sectional view of the housing of the present invention;

fig. 3 is a cross-sectional view of the sealing post of the present invention;

in the figure: the device comprises a shell, a channel 1a, a guide hole 1B, a sealing ring groove A, an internal thread 1d, an upper step 1e, a sealing column 2, a guide head 2a, a lower step 2B, a spring mounting hole 2c, a wax flowing groove A2d, a wax flowing groove B2e, a sealing ring groove B2f, an adjusting block 3, a spring 4 and a sealing ring 5.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 to 3, a high-pressure check valve comprises a housing 1, a sealing post 2, an adjusting block 3, a spring 4 and a sealing ring 5, wherein a channel 1a is formed in the housing 1 along the axial direction thereof, a guide hole 1B is formed in the middle of the channel 1a, the inner diameter of the guide hole 1B is smaller than that of the channel 1a, the lower end surface of the guide hole 1B is an upper step 1e, a sealing ring groove A1c is formed in the inner side of the upper step 1e, an internal thread 1d is formed in the inner wall of the lower end of the channel 1a, the sealing post 2 comprises a guide head 2a and a lower step 2B which are integrally formed and coaxial, a spring mounting hole 2c is formed below the lower step 2B, a plurality of wax flow grooves A2d are formed in the outer wall of the guide head 2a along the axial direction thereof, a plurality of wax flow grooves B2e are formed in the outer wall of the spring mounting hole 2c along the axial direction thereof, and a sealing ring groove B2f is formed in the upper surface of the lower step 2B, the guide head 2a extends into the guide hole 1B, the seal ring 5 is mounted in an annular cavity formed by a seal ring groove A1c and a seal ring groove B2f, the radii of the seal ring groove A1c and the seal ring groove B2f are consistent with the radius of the seal ring 5, more preferably, the seal ring groove B2f is a 3/4 arc groove, and the seal ring groove A1c is a 1/4 arc groove, so that most of the seal ring 5 is sunk into the seal ring groove B2f when being mounted, the seal ring 5 is prevented from falling off, the outer wall of the adjusting block 3 is provided with external threads, the adjusting block 3 is connected with the lower end of the housing 1 through threaded fit, a spring 4 is mounted in the spring mounting hole 2c, the upper end of the spring 4 abuts against the top surface of the spring mounting hole 2c, and the lower end abuts against the center of the adjusting block 3.

Furthermore, the guide head 2a and the guide hole 1b are in clearance fit.

Further, the internal diameter of going up step 1e is less than the external diameter of lower step 2b, and upward step 1e plays limiting displacement to sealed post 2's removal, and when sealed post 2 upwards removed to a certain extent, lower step 2b can the butt on last step 1e, and sealing washer 5 still is in encapsulated situation this moment, and upward step 1e bears the thrust of sealed post 2 rebound simultaneously, can prevent that sealing washer 5 from damaging because of excessive extrusion.

The working process of the utility model is as follows: when the medium pressure above the guide head 2a exceeds the elastic force of the spring 4, the whole sealing column 2 moves downwards, the sealing ring 5 is separated from the sealing ring groove A1c to form a flow passage, and the medium passes through the flow passage from the wax flowing groove A2d to flow into the wax flowing groove B2e and further flows out from the lower end of the adjusting block 3 to form downward conduction. On the contrary, when the pressure at the lower end of the sealing column 2 and the elasticity of the spring 4 are greater than the pressure of the guide head 2a, the whole sealing column 2 moves upwards, the sealing ring 6 is pressed tightly to play a sealing role and form an upward blocking function. When the pressure at the lower end of the sealing column 2 is continuously increased, the lower step 2b on the sealing column 2 can abut against the upper step 1e above the lower step to bear the main pressure, and the sealing ring 5 is not compressed any more, so that the sealing ring can be kept, and the sealing ring 5 can be prevented from being damaged due to overlarge stress.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high pressure check valve which is characterized in that: comprises a shell (1), a sealing column (2), an adjusting block (3), a spring (4) and a sealing ring (5),

a channel (1 a) is formed in the shell (1) along the axial direction, a guide hole (1 b) is formed in the middle of the channel (1 a), the inner diameter of the guide hole (1 b) is smaller than that of the channel (1 a), the lower end face of the guide hole (1 b) is an upper step, a sealing ring groove A (1 c) is formed in the inner side of the upper step, an internal thread (1 d) is formed in the inner wall of the lower end of the channel (1 a),

the sealing column (2) comprises a guide head (2 a) and a lower step (2B) which are integrally formed and coaxial, a spring mounting hole (2 c) is formed below the lower step (2B), a plurality of wax flow grooves A (2 d) are formed in the outer wall of the guide head (2 a) along the axial direction of the outer wall, a plurality of wax flow grooves B (2 e) are formed in the outer wall of the spring mounting hole (2 c) along the axial direction of the outer wall, a sealing ring groove B (2 f) is formed in the upper surface of the lower step (2B),

the utility model discloses a seal ring structure, including guide head (2 a), sealing washer groove A (1 c) and sealing washer groove B (2 f), guide head (2 a) stretch into in guide hole (1B), sealing washer (5) are installed in the annular cavity that sealing washer groove A (1 c) and sealing washer groove B (2 f) formed, the outer wall of regulating block (3) is provided with the external screw thread, the lower extreme of regulating block (3) and shell (1) is connected through screw-thread fit, spring (4) are equipped with in spring mounting hole (2 c), the upper end butt of spring (4) is on the top surface of spring mounting hole (2 c), and the lower extreme butt is in the central point of regulating block (3) and.

2. A high pressure one way valve as claimed in claim 1, wherein: the guide head (2 a) is in clearance fit with the guide hole (1 b).

3. A high pressure one way valve as claimed in claim 1, wherein: the inner diameter of the upper step is smaller than the outer diameter of the lower step (2 b).