CN216306809U

CN216306809U - One-way valve

Info

Publication number: CN216306809U
Application number: CN202122081784.3U
Authority: CN
Inventors: 席英杰; 刘志刚; 李鸿
Original assignee: Henan Tengyue Machinery Technology Co ltd
Current assignee: Henan Tengyue Machinery Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-04-15
Anticipated expiration: 2031-08-31

Abstract

The utility model belongs to the technical field of pneumatic elements, and particularly relates to a one-way valve which comprises a valve body, a piston and a valve seat, wherein the valve body is provided with an air inlet hole and a through hole which is coaxially communicated with the air inlet hole; the valve seat comprises a valve column and a step type air outlet hole which is coaxially arranged, the valve column is also provided with a flow collecting hole communicated with the air outlet hole, and the flow collecting hole is positioned at one end of the valve column close to the piston; the elastic element for resetting the piston is arranged between the piston and the valve seat, so that the utility model effectively prevents high-pressure gas from directly impacting the cone, and can greatly prolong the service life of the cone.

Description

One-way valve

Technical Field

The utility model belongs to the technical field of pneumatic elements, and particularly relates to a one-way valve.

Background

The check valve is a common element for high-precision pneumatic control, but the limited check valve has the following problems: the high-pressure gas directly impacts the cone, the impact between the cone and the valve seat is large, the service life of the cone is short, and the control precision is influenced after the cone is used for a long time.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a one-way valve which has the characteristic of small impact of a high-pressure gas direct-impact cone.

In order to achieve the purpose, the utility model provides the following technical scheme: a check valve comprises a valve body, a piston and a valve seat, wherein the valve body is provided with an air inlet hole and a through hole which is coaxially communicated with the air inlet hole, one end of the through hole, which is close to the air inlet hole, is provided with a conical surface, the piston is arranged in the through hole, the valve seat is arranged at the outer end of the through hole, the piston is in a step shape and comprises a cone matched with the conical surface and a cylinder matched with the through hole, and the cylinder is provided with a diversion trench; the valve seat comprises a valve column and a step type air outlet hole which is coaxially arranged, the valve column is also provided with a flow collecting hole communicated with the air outlet hole, and the flow collecting hole is positioned at one end of the valve column close to the piston; and an elastic element for resetting the piston is arranged between the piston and the valve seat.

Preferably, the diversion trench is arranged at the outer edge of the column body.

Preferably, the axis of the collecting hole and the axis of the air outlet hole form an acute angle.

Preferably, a chamfer is arranged at the edge of the valve column close to the end face of the piston, and the width of the chamfer is greater than the diameter of the flow collecting hole.

Preferably, the cylinder center is equipped with the blind hole that is used for placing elastic element, the valve post axle center department is equipped with the step hole that is used for placing elastic element.

Preferably, the stepped hole is communicated with the air outlet hole.

Preferably, the front end of the cone is a 90-degree cone inclined plane.

Preferably, one end of the valve body air inlet hole is provided with a first rectangular platform, and the outer end of the valve seat is provided with a second rectangular platform.

Preferably, the elastic element is one of a cylindrical spring and a tower spring or a combination thereof.

Preferably, at least two flow guide grooves are uniformly distributed; the flow collecting holes are at least provided with two and are uniformly distributed.

Compared with the prior art, the utility model has the beneficial effects that:

1. the 90-degree cone inclined plane at the front end of the cone plays a role in annular flow distribution on high-pressure air in the air inlet process, air flow enters 8 flow collecting holes in the valve seat through the piston and then flows together to enter the high-pressure air pipe, the aerodynamic principle is met, the high-pressure air is effectively prevented from directly impacting the cone, and the service life of the cone can be greatly prolonged.

2. High-pressure gas passes through the venthole in the middle of the valve seat, the straight piston moves to the left, the cone is combined with the conical surface to achieve the sealing effect, and meanwhile, the restoration effect of the elastic element is matched to play a double-insurance effect on the closure action, so that the response capability of the check valve is provided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an exploded view of an assembly of the present invention;

FIG. 2 is a perspective view of the present invention;

in the figure: 1. a valve body; 2. a piston; 3. a valve seat; 4. a second rectangular table; 5. an elastic element; 6. a manifold hole; 7. a stepped bore; 8. a diversion trench; 9. a cylinder; 10. a cone; 11. a first rectangular table; 12. an air inlet; 13. a through hole; 14. a conical surface; 15. a spool; 16. an air outlet; 17. chamfering; 18. blind holes; 19. a conical bevel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-2, the present invention provides the following technical solutions: a check valve comprises a valve body 1, a piston 2 and a valve seat 3, wherein the valve body 1 is provided with an air inlet 12 and a through hole 13 which is coaxially communicated with the air inlet 12, one end of the through hole 13, which is close to the air inlet 12, is provided with a conical surface 14, the piston 2 is arranged in the through hole 13, the valve seat 3 is arranged at the outer end of the through hole 13, the piston 2 is in a step shape and comprises a cone matched with the conical surface 14 and a cylinder 9 matched with the through hole 13, and a diversion trench 8 is arranged on the cylinder 9; the valve seat 3 comprises a valve column 15 and a step-type air outlet 16 which is coaxially arranged, the valve column 15 is also provided with a collecting hole 6 which is communicated with the air outlet 16, and the collecting hole 6 is positioned at one end of the valve column 15, which is close to the piston 2; an elastic element 5 for resetting the piston 2 is arranged between the piston 2 and the valve seat 3. Preferably, the elastic element 5 is a cylindrical spring or a tower spring.

The working principle is as follows: air intake action: the gas enters the valve body 1 from the gas inlet hole 12, the piston 2 is flushed, the gas path of the piston 2 is opened when the piston 2 moves rightwards, the gas enters the flow collecting hole 6 on the valve seat 3 through the flow guide groove 8 on the column body 9, enters the gas outlet hole 16, is discharged out of the one-way valve and enters the high-pressure gas pipe. Further, the cutoff action: after gas stops admitting air from the direction of admitting air, the high-pressure gas in the valve seat 3 can flow back, and the backflow gas can reversely push the check valve piston 2 to move leftwards and be attached to the inner wall of the valve body 1, so that backflow of the high-pressure gas is prevented. Preferably, the center of the cylinder 9 is provided with a blind hole 18 for placing the elastic element 5, the axis of the valve column 15 is provided with a stepped hole 7 for placing the elastic element 5, and the stepped hole 7 is communicated with the air outlet 16. The step hole 7 and the blind hole 18 are arranged to prevent the elastic element 5 from being inclined, radial stress and abrasion of the piston 2 are reduced, the service lives of the elastic element 5 and the piston 2 are prolonged, the piston 2 moves smoothly, and noise is reduced. Furthermore, the stepped hole 7 is communicated with the air outlet hole 16, so that backflow gas can pass through the air outlet hole 16 in the middle of the valve seat 3, the straight piston 2 moves leftwards, the cone 10 is combined with the conical surface 14 to achieve a sealing effect, and meanwhile, the elastic element 5 is matched with a resetting effect to play a double-insurance role in closure action, so that the response capability of the check valve is provided.

On the basis of the scheme, 9 outer fringe departments of cylinder are located to guiding gutter 8, and cone 10 plays annular reposition of redundant personnel effect air current and gets into the current-collecting hole 6 of valve body 1 through piston 2 edge guiding gutter 8 to high-pressure gas, and evenly distributed guiding gutter 8 and current-collecting hole 6 all have the air current to link up smoothly to guiding gutter 8 has the trend of rightting to piston 2, is favorable to reducing the friction with 1 inner wall of valve body, has greatly reduced the wearing and tearing of piston 2.

Further, the axis of the flow collecting hole 6 and the axis of the air outlet 16 form an acute angle, the design is favorable for being connected with the airflow of the flow guide groove 8, a chamfer 17 is arranged at the edge of the end face of the valve column 15 close to the piston 2, the width of the chamfer 17 is larger than the diameter of the flow collecting hole 6, the chamfer 17 is favorable for processing the flow collecting hole 6, and the processing difficulty is reduced.

Preferably, one end of the air inlet 12 of the valve body 1 is provided with a first rectangular platform 11, and the outer end of the valve seat 3 is provided with a second rectangular platform 4. The first rectangular table 11 and the second rectangular table 4 are arranged, so that tools can be conveniently clamped, and the tools can be conveniently detached and maintained.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A check valve, includes valve body (1), piston (2) and disk seat (3), its characterized in that: the valve body (1) is provided with an air inlet hole (12) and a through hole (13) which is coaxially communicated with the air inlet hole (12), one end, close to the air inlet hole (12), of the through hole (13) is provided with a conical surface (14), the piston (2) is arranged in the through hole (13), the valve seat (3) is located at the outer end of the through hole (13), the piston (2) is in a step shape and comprises a cone (10) matched with the conical surface (14) and a cylinder (9) matched with the through hole (13), and the cylinder (9) is provided with a flow guide groove (8); the valve seat (3) comprises a valve column (15) and a step type air outlet hole (16) which is coaxially arranged, the valve column (15) is also provided with a flow collecting hole (6) which is communicated with the air outlet hole (16), and the flow collecting hole (6) is positioned at one end, close to the piston (2), of the valve column (15); an elastic element (5) for resetting the piston (2) is arranged between the piston (2) and the valve seat (3).

2. A one-way valve according to claim 1, wherein: the diversion trench (8) is arranged at the outer edge of the column body (9).

3. A one-way valve according to claim 1, wherein: the axis of the collecting hole (6) and the axis of the air outlet hole (16) form an acute angle.

4. A one-way valve according to claim 3, wherein: and a chamfer (17) is arranged at the edge of the valve column (15) close to the end face of the piston (2), and the width of the chamfer (17) is greater than the diameter of the collecting hole (6).

5. A one-way valve according to claim 1, wherein: the center of the column body (9) is provided with a blind hole (18) for placing the elastic element (5), and the axis of the valve column (15) is provided with a step hole (7) for placing the elastic element (5).

6. A check valve as claimed in claim 5, wherein: the stepped hole (7) is communicated with the air outlet hole (16).

7. A check valve as claimed in any one of claims 1 to 6, wherein: the front end of the cone (10) is a 90-degree cone inclined plane (19).

8. A one-way valve according to claim 7, wherein: one end of an air inlet (12) of the valve body (1) is provided with a first rectangular platform (11), and the outer end of the valve seat (3) is provided with a second rectangular platform (4).

9. A check valve as claimed in any one of claims 1 to 6, wherein: the elastic element (5) is one or a combination of a cylindrical spring and a tower spring.

10. A check valve as claimed in any one of claims 1 to 6, wherein: at least two flow guide grooves (8) are uniformly distributed; the flow collecting holes (6) are at least provided with two and are uniformly distributed.