CN210716140U

CN210716140U - Spring hydrogenation port

Info

Publication number: CN210716140U
Application number: CN201921597597.7U
Authority: CN
Inventors: 顾成杰; 王晨生; 林垚
Original assignee: Shanghai Sunwise Energy System Co ltd
Current assignee: Shanghai Sunwise Energy System Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-06-09
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a spring hydrogenation port, which relates to the field of hydrogen supply systems and comprises an upper valve body and a lower valve body which are connected through screw threads, wherein the inner wall of the upper valve body is provided with an inner conical surface, and the upper end part of the lower valve body is provided with an outer conical surface; the check valve comprises a valve seat, a valve clack structural member and a spring, wherein the valve seat is fixed in an upper valve body, the valve clack structural member is in threaded connection with the lower valve body, a groove is formed in the valve clack structural member and used for being matched with the lower end portion of the valve clack, the spring is arranged between the valve clack and the valve clack structural member, a sealing groove is formed in the lower end portion of the valve seat, a valve clack sealing ring is fixed in the sealing groove, and. The utility model discloses an upper valve body and lower valve body of spring hydrogenation mouth adopt hard seal, have improved life, have enlarged temperature and medium application scope, and hard seal adopts the conical surface of angle difference, and is the same at the axial packing force, and is bigger than plane seal's sealed specific pressure.

Description

Spring hydrogenation port

Technical Field

The utility model relates to a hydrogen supply system's technical field especially relates to a spring hydrogenation mouth.

Background

The hydrogenation port is used for a hydrogen fuel cell automobile, and high-pressure hydrogen can be introduced into the hydrogenation port from the hydrogenation gun after the hydrogenation port is connected with the hydrogenation gun and then enters a hydrogen storage system. The hydrogenation port usually consists of a connector adapted to the hydrogenation gun, a filter, a check valve and a connector connected to the rear end pipeline.

When the hydrogenation port is sealed, a soft sealing type of an O-shaped ring matched with a retainer ring is generally adopted. But the aging resistance of the O-shaped ring rubber material is limited, and the service life of the seal cannot be effectively ensured. Meanwhile, the rubber material can bring about the problem of temperature resistance, and under the condition of extreme temperature, the shrinkage and expansion of the rubber material can greatly influence the sealing performance.

SUMMERY OF THE UTILITY MODEL

To the problem of the aforesaid production, the utility model aims to provide a spring hydrogenation mouth goes up the valve body and has adopted hard seal down between the valve body, improves hydrogenation mouth life and sealing reliability.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

the spring hydrogenation port comprises an upper valve body, a lower valve body and a one-way valve, wherein the upper valve body is connected with the lower valve body through threads, the upper end of the lower valve body is arranged inside the upper valve body, an inner conical surface is arranged on the inner wall of the upper valve body, an outer conical surface is arranged at the upper end of the lower valve body, the inner conical surface and the outer conical surface are matched with each other, and a cavity is formed inside the upper valve body and the lower valve body; the check valve sets up in the cavity, the check valve includes disk seat, valve clack structure and spring, the disk seat is fixed go up in the valve body, valve clack structure threaded connection in the valve body down, the valve clack sets up the disk seat with between the valve clack structure, be provided with the recess on the valve clack structure, the recess be used for with the lower tip of valve clack cooperatees, the spring sets up the valve clack with between the valve clack structure, the seal groove has been seted up to the lower tip of disk seat, the seal groove internal fixation has the valve clack sealing washer, the upper end of valve clack outwards extends and forms guiding mechanism, guiding mechanism's cross-section is the toper, guiding mechanism inserts on the gas passage in the disk seat.

Preferably, the spring is sleeved on the valve clack, a step is arranged on the valve clack and abuts against the upper end of the spring, a limiting groove is arranged on the wall surface of the groove of the valve clack structural member, the spring is arranged on the limiting groove, and the lower end of the spring abuts against the bottom of the limiting groove.

Preferably, the section of the valve flap sealing ring is oval.

By adopting the technical scheme, the upper valve body and the lower valve body are jointed through the inner conical surface and the outer conical surface to form a hard sealing form, so that the use of O-shaped rings and check rings is reduced, the service life is prolonged, the application range of temperature and media is expanded, and the sealing specific pressure is large. The sealing force between the upper valve body and the lower valve body is provided by the thread pretightening force, so that the thread pretightening force can be properly increased on the premise of ensuring the thread strength, and the sealing reliability is improved. The valve clack sealing washer designs into special-shaped cross-section, compares and uses O type circle to have better low pressure suitability, also can obtain sufficient seal area promptly when medium pressure is lower, adopts the design of sealed face and installation face separation simultaneously, receives the deformation that pressure produced when making the installation of valve clack sealing washer, can not influence sealed face, has improved sealed reliability. Through setting up the guiding mechanism that is the toper, guarantee the reasonable internal diameter and the width of sealed face between valve clack and the disk seat.

The utility model discloses further set up to: a filter screen is fixed in the upper valve body close to the inlet end and is positioned on one side of the valve seat.

By adopting the technical scheme, when dust or medium impurities exist in the hydrogenation process, the filter screen can effectively filter the impurities, so that the hydrogen entering the valve seat does not contain the impurities.

The utility model discloses further set up to: the outlet end of the lower valve body is provided with a front ferrule and a rear ferrule, and a locking nut is arranged outside the lower valve body.

By adopting the technical scheme, when the locking nut is locked, the rear ferrule compresses the front ferrule, the rear ferrule and the front ferrule are clamped on the connecting pipeline, and the sealing of the hydrogenation port and the pipeline is ensured.

The utility model discloses further set up to: and a nut is sleeved outside the lower valve body.

The utility model discloses further set up to: a first annular groove is formed in the outer wall of the valve seat, and a first O-shaped ring and a check ring are arranged in the first annular groove.

The utility model discloses further set up to: and a second annular groove is formed in the outer end part of the upper valve body, and a second O-shaped ring is arranged in the second annular groove.

The utility model discloses further set up to: and a thread tool withdrawal groove is formed in the upper valve body, so that the valve seat and the valve clack structural member are limited.

The utility model discloses further set up to: the outer wall surface of the valve clack is provided with a valve clack limiting surface, and the valve clack limiting surface is abutted against the upper end part of the valve clack structural member.

The utility model discloses further set up to: a groove is formed in one side in the sealing groove, and one side of the valve clack sealing ring is clamped in the groove.

The utility model discloses owing to adopt above-mentioned technique, make it compare the positive effect that has with prior art and be:

(1) the utility model discloses an upper valve body and lower valve body of spring hydrogenation mouth adopt hard sealing, have reduced the use of O type circle and retaining ring, have improved life, have enlarged temperature and medium application scope, and hard sealing adopts the conical surface of angle difference, and when the axial packing force is the same, it is big than plane seal's sealed specific pressure.

(2) The utility model discloses a spring adds the last valve body of hydrogen mouth and the sealing force between the valve body down is provided by the screw thread pretightning force, can be under the prerequisite of guaranteeing screw thread intensity, suitably increases the screw thread pretightning force, improves the valve body and seals the reliability.

(3) The utility model discloses a spring hydrogenation mouth designs into valve clack sealing washer of dysmorphism cross-section, compares O type circle and has better low pressure suitability, also can obtain sufficient seal area when medium pressure is lower promptly. Meanwhile, due to the design that the sealing surface is separated from the mounting surface, the sealing ring is not influenced by deformation generated by pressure during mounting, and the sealing reliability is improved.

(4) The utility model discloses a spring hydrogenation mouth has the guiding mechanism of awl face shape in valve clack top processing, and the center function is realized being to the help valve clack, guarantees the internal diameter and the width of sealed face between valve clack and the disk seat.

Drawings

FIG. 1 is a cross-sectional view of a spring hydrogenation port of the present invention;

FIG. 2 is an exploded view of the spring hydrogenation port of the present invention;

FIG. 3 is a cross-sectional view of a valve seat of a spring hydrogenation port of the present invention;

fig. 4 is an enlarged view of the present invention at a in fig. 3;

FIG. 5 is a cross-sectional view of the valve flap structure of the present invention;

fig. 6 is a schematic view of a valve flap of the present invention;

fig. 7 is an assembly schematic of the valve flap, spring and flap structure of the present invention.

In the drawings: 1. an upper valve body; 11. an inner conical surface; 12. a thread relief groove; 13. a second annular groove; 14. a second O-ring; 2. a lower valve body; 21. an outer conical surface; 22. a nut; 3. a one-way valve; 31. a valve seat; 311. a sealing groove; 3111. a trench; 312. a valve clack sealing ring; 313. a first annular groove; 314. a first O-ring; 315. a retainer ring; 32. a valve flap; 321. a guide mechanism; 322. a valve clack limiting surface; 323. a step; 33. a valve flap structure; 331. a groove; 332. a limiting groove; 333. a diversion trench; 34. a spring; 4. a filter screen; 51. a front ferrule; 52. a rear ferrule; 53. and locking the nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings and specific embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, a spring hydrogenation port provided in an embodiment of the present invention includes an upper valve body 1, a lower valve body 2, and a check valve 3.

The upper valve body 1 and the lower valve body 2 are connected through threads, the upper end of the lower valve body 2 is arranged inside the upper valve body 1, the inner conical surface 11 is arranged on the inner wall of the upper valve body 1, the outer conical surface 21 is arranged at the upper end of the lower valve body 2, the inner conical surface 11 and the outer conical surface 21 are matched with each other, and a cavity is formed inside the upper valve body 1 and the lower valve body 2. After the upper valve body 1 and the lower valve body 2 are in threaded connection, the inner conical surface 11 and the outer conical surface 21 are attached to form hard seal, and the hard seal can prolong the service life of the hydrogenation port and improve the sealing reliability. The hydrogen of the external hydrogen supply system enters the hydrogenation port through the inlet end of the upper valve body 1 and enters the hydrogen using equipment from the outlet end of the lower valve body 2.

Referring to fig. 1, 3, 4, 5, 6 and 7, the check valve 3 is disposed in the cavity, the check valve 3 includes a valve seat 31, a valve flap 32 structural member and a spring 34, the valve seat 31 is fixed in the upper valve body 1, the valve flap 32 structural member is screwed in the lower valve body 2, the valve seat 31 and the valve flap 32 structural member are opposite, the valve flap 32 is disposed between the valve seat 31 and the valve flap 32 structural member, the spring 34 is disposed between the valve flap 32 and the valve flap 32 structural member, the upper end of the valve flap 32 abuts against the lower end of the valve seat 31, the lower end of the valve seat 31 is provided with a sealing groove 311, one side of the sealing groove 311 is provided with a groove 3111, one side of the valve flap sealing ring 312 is clamped in the groove 3111, it is ensured that the valve flap sealing ring 312 cannot fall off from the sealing groove 311; one end of the valve flap 32 adjacent to the valve seat 31 extends outward to form a guide 321, the guide 321 has a tapered cross section, and the guide 321 is inserted into the gas passage in the valve seat 31.

When the check valve 3 is in a closed state, the upper end of the valve clack 32 is tightly pressed on the valve clack sealing ring 312, so that the sealing performance of the check valve 3 is ensured; the lower part in the valve clack 32 structure is provided with a groove 331, the groove 331 is used for being matched with the lower end part of the valve clack 32, the wall surface of the groove 331 is provided with a limit groove 332, the spring 34 is arranged in the limit groove 332, the spring 34 is sleeved on the valve clack 32, the lower end of the spring 34 is abutted against the bottom of the limit groove 332, the valve clack 32 structure is provided with a diversion groove 333, and gas in the cavity enters the outlet end of the lower valve body 2 through the diversion groove 333. A filter screen 4 is fixed in the upper valve body 1 close to the inlet end, and the filter screen 4 is positioned on one side of the valve seat 31.

In the resetting stroke of the valve clack 32, in order to ensure the stability of the size and the width of a sealing surface during sealing, a guide mechanism 321 is designed at the upper end of the valve clack 32 and is processed into a conical section, and if the valve clack 32 generates position deviation during resetting, the conical section can play a role of automatically centering. The guide mechanism 321 is longer than the protruding height of the valve clack sealing ring 312, so that the valve clack 32 is in a designed position before the valve clack 32 contacts the valve clack sealing ring 312, the valve clack 32 and the valve clack sealing ring 312 do not slide relatively, the service life of the valve clack sealing ring 312 is prolonged, and the sealing reliability is improved. When the medium force is large, the valve flap 32 presses the valve flap seal ring 312 to generate large deformation, and a sufficient sealing area can be obtained.

Through the utility model discloses a spring hydrogenation mouth when hydrogenation is carried out hydrogen storage facilities or hydrogen user equipment, hydrogen gets into inside from the entry end of last valve body 1, through filter screen 4, hydrogen after the filtration gets into on the inside gas passage of disk seat 31, valve clack 32 moves under the pressure promotion of hydrogen, spring 34 is compressed under the guide of valve clack 32, valve clack 32's guiding mechanism 321 is to the direction motion of keeping away from disk seat 31, valve clack 32 and valve clack sealing washer 312 phase separation, hydrogen can flow into in the guiding gutter 333 of valve clack 32 structure from the clearance between valve clack 32 and the disk seat 31, reach the exit end of valve body 2 down, finally get into hydrogen storage facilities or hydrogen user equipment that are connected with valve body 2 down. After hydrogenation is finished, when the pressure difference between the hydrogenation gun and the cavity is smaller than the force of the spring 34, the spring 34 can push the valve clack 32 to reset, the spring 34 restores to the original length, the valve clack 32 is completely closed, the valve clack 32 and the valve clack sealing ring 312 are sealed with each other again, and hydrogen backflow is prevented.

It should also be noted that the terms "upper" and "lower" as used herein are defined with reference to the relative positions of the components in the drawings of the present invention, and are used for clarity and convenience of description, and it should be understood that the terms should not be used to limit the scope of the present application.

Compared with the prior art, the spring hydrogenation port provided by the utility model has the advantages that when the spring hydrogenation port is applied, the inner conical surface 11 of the upper valve body 1 and the outer conical surface 21 of the lower valve body 2 form hard seal, the service life of the hydrogenation port is prolonged, the sealing force between the upper valve body 1 and the lower valve body 2 is provided by the thread pretightening force, the thread pretightening force can be properly increased on the premise of ensuring the thread strength, and the sealing reliability of the valve body is improved; in the return stroke of the valve flap 32, a guide 321 is provided at the upper end of the valve flap 32 in order to ensure the stability of the size and width of the sealing surface during sealing. Therefore, the service life of the spring hydrogenation port is prolonged by matching the inner conical surface 11 with the outer conical surface 21, and the conical surface guide mechanism 321 is processed at the top end of the valve clack 32, so that the sealing reliability is improved.

Referring to fig. 1 and 2, further, a front ferrule 51 and a rear ferrule 52 are disposed at an outlet end of the lower valve body 2, and a locking nut 53 is disposed at an outer portion of the lower valve body, when the locking nut 53 is locked, the rear ferrule 52 presses the front ferrule 51, the rear ferrule 52 and the front ferrule 51 are locked on the connecting pipeline, so as to ensure sealing of the hydrogenation port and the pipeline, and a nut 22 is sleeved on the outer portion of the lower valve body 2.

Referring to fig. 1 and 3, a first annular groove 313 is formed in an outer wall of the valve seat 31, and a first O-ring 314 and a retainer ring 315 are disposed in the first annular groove 313 to seal the valve seat 31 and the upper valve body 1.

Further, the outer end of the upper valve body 1 is provided with a second annular groove 13, and a second O-ring 14 is arranged in the second annular groove 13.

Referring to fig. 2, to further optimize the above technical solution, a thread relief groove 12 is formed in the upper valve body 1 for limiting the structural members of the valve seat 31 and the valve flap 32.

Referring to fig. 6 and 7, in an embodiment of the present invention, a valve flap limiting surface 322 and a step 323 are disposed on an outer wall surface of the valve flap 32, the step supports against an upper end of the spring 34, and after the step 323 of the valve flap 32 compresses the spring 34 to a certain extent, the valve flap limiting surface 322 supports against an upper end of the valve flap structural member 33, so that when the valve flap 32 is located at a maximum stroke position, a compression amount of the spring 34 is also within a working range, and a service life of the spring 34 can be prolonged.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Spring hydrogenation mouth, including last valve body (1), lower valve body (2) and check valve (3), its characterized in that:

the upper valve body (1) is connected with the lower valve body (2) through threads, the upper end of the lower valve body (2) is arranged inside the upper valve body (1), an inner conical surface (11) is arranged on the inner wall of the upper valve body (1), an outer conical surface (21) is arranged at the upper end of the lower valve body (2), the inner conical surface (11) and the outer conical surface (21) are matched with each other, and a cavity is formed inside the upper valve body (1) and the lower valve body (2);

the check valve (3) is arranged in the cavity, the check valve (3) comprises a valve seat (31), a valve clack (32), a valve clack structural member (33) and a spring (34), the valve seat (31) is fixed in the upper valve body (1), the valve clack structural member (33) is in threaded connection with the lower valve body (2), the valve clack (32) is arranged between the valve seat (31) and the valve clack structural member (33), a groove (331) is arranged on the valve clack structural member (33), the groove (331) is used for being matched with the lower end part of the valve clack (32), the spring (34) is arranged between the valve clack (32) and the valve clack structural member (33), a sealing groove (311) is arranged at the lower end part of the valve seat (31), a valve clack sealing ring (312) is fixed in the sealing groove (311), and the upper end part of the valve clack (32) extends outwards to, the section of the guide mechanism (321) is conical, and the guide mechanism (321) is inserted into a gas channel in the valve seat (31).

2. The spring hydrogenation port according to claim 1, wherein a filter screen (4) is fixed in the upper valve body (1) close to the inlet end, and the filter screen (4) is positioned on one side of the valve seat (31).

3. Spring hydrogenation port according to claim 1, characterized in that the outlet end of the lower valve body (2) is provided with a front ferrule (51) and a rear ferrule (52) and is provided externally with a locking nut (53).

4. The spring hydrogenation port according to claim 1, wherein the lower valve body (2) is externally sleeved with a nut (22).

5. The spring hydrogenation port according to claim 1, wherein a first annular groove (313) is formed in an outer wall of the valve seat (31), and a first O-ring (314) and a retaining ring (315) are arranged in the first annular groove (313).

6. The spring hydrogenation port according to claim 1, wherein a second annular groove (13) is formed at the outer end of the upper valve body (1), and a second O-ring (14) is formed in the second annular groove (13).

7. The spring hydrogenation port according to claim 1, wherein a thread relief groove (12) is formed in the upper valve body (1).

8. The spring hydrogenation port according to claim 1, wherein a valve flap limiting surface (322) is formed in the middle of the outer wall surface of the valve flap (32), and the valve flap limiting surface (322) abuts against the upper end of the valve flap structural member (33).

9. The spring hydrogenation port as claimed in claim 1, wherein a groove (3111) is formed in one side of the sealing groove (311), and one side of the valve flap sealing ring (312) is clamped in the groove (3111).