CN217381671U

CN217381671U - Hydrogen proportional valve seal structure

Info

Publication number: CN217381671U
Application number: CN202220140090.4U
Authority: CN
Inventors: 许文; 孙振兴; 熊文诚; 李刚; 吴楚; 陈杰
Original assignee: Wuxi Weifu High Technology Group Co Ltd
Current assignee: Wuxi Weifu High Technology Group Co Ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-09-06
Anticipated expiration: 2032-01-19

Abstract

The utility model belongs to the technical field of sealing, and relates to a sealing structure of a hydrogen proportional valve, which comprises a sealing gasket component and a sealing seat component; the sealing gasket component comprises a sealing gasket insert and a sealing gasket, and the lower end of the sealing gasket insert is positioned in the sealing gasket; the sealing seat component comprises an annular sealing boss, an annular groove, a limiting surface, a flow passage hole and a sealing seat, the flow passage hole is formed in the sealing seat, the upper end surface of the sealing seat is the limiting surface, and the annular sealing boss protrudes out of the limiting surface and is positioned on the inner side of the limiting surface; an annular groove is formed in the outer side of the annular sealing boss; by optimizing the sealing structure, the anti-adhesion performance, the product durability, the product stability, the adjustment precision and the consistency of the hydrogen proportional valve are obviously improved on the basis of keeping the original sealing effect.

Description

Hydrogen proportional valve seal structure

Technical Field

The utility model belongs to the technical field of it is sealed, a hydrogen proportional valve seal structure is related to.

Background

The hydrogen proportional valve is a hydrogen control valve of a hydrogen fuel cell system, and is an electromagnetic proportional valve product for accurately regulating the hydrogen flow and pressure; meanwhile, the hydrogen gas supply device has the function of switching on and off the hydrogen gas supply pipeline, and is used as a normally closed valve, and the sealing gasket and the sealing seat are in mutual contact to keep sealing when the power is off, so that the hydrogen gas supply device plays a role in preventing the flow and leakage of the hydrogen gas; the requirement on the air tightness of the hydrogen proportional valve is high, and the pressure of the conveyed hydrogen medium is high, so that leakage is easy to occur, and the sealing performance of the sealing structure at the position has high requirement; meanwhile, when the power is on, the sealing gasket is separated from the sealing seat, a gas flow channel is generated, and the valve is opened, so that the function of adjusting the hydrogen flow and the pressure is achieved; because the flow area between the sealing gasket and the sealing seat needs to be controlled to realize accurate control of hydrogen flow, the precision of the sealing structure is also required to be higher.

In the prior art, most hydrogen proportional valves adopt mutual contact type sealing of a sealing gasket and a sealing seat, and the sealing gasket deforms under the action of extrusion force to achieve the sealing effect; the gasket is generally a readily deformable material, such as a rubber material; the sealing gasket can deform under high and low temperature environments, and the deformation of the sealing gasket is greatly changed along with the compression force; therefore, the consistency of the flow and pressure performance can not be maintained easily in the working process of the hydrogen proportional valve, and the adjusting precision of the hydrogen proportional valve is reduced to a great extent; and the sealing ring surface of the sealing seat is narrow, and the sealing gasket is contacted with the sealing seat for a long time to cause the sealing gasket to be sunken and adhered with the sealing seat, so that the hydrogen proportional valve cannot be normally used.

Disclosure of Invention

An object of the utility model is to provide a hydrogen proportional valve seal structure can improve the sealed deformation of filling up under high, low temperature environment, and improves the influence that the packing deflection is changed by the compression force, and to a great extent has solved the problem because of the flow error that the sealed deformation of filling up leads to.

According to the utility model provides a technical scheme: a hydrogen proportional valve sealing structure comprises a sealing gasket component and a sealing seat component; the sealing gasket component comprises a sealing gasket insert and a sealing gasket, and the lower end of the sealing gasket insert is positioned in the sealing gasket;

the sealing seat component comprises an annular sealing boss, an annular groove, a limiting surface, a flow passage hole and a sealing seat, the flow passage hole is formed in the sealing seat, the upper end surface of the sealing seat is the limiting surface, and the annular sealing boss protrudes out of the limiting surface and is positioned on the inner side of the limiting surface; and an annular groove is formed in the outer side of the annular sealing boss.

Preferably, the lower extreme of sealed pad inserts sets up annular protrusion set up on the sealing pad can with the annular caulking groove of annular protrusion matching, sealed pad inserts and sealed pad utilize annular protrusion and annular caulking groove to be connected the structure as an organic whole.

Preferably, the end of the annular sealing boss is in circular arc transition.

Preferably, the joint part of the annular groove and the limiting surface is rounded.

The positive progress effect of this application lies in:

the embodiment of the utility model provides a pair of seal structure of hydrogen proportional valve through optimizing seal structure, on keeping the basis of original sealed effect, is showing anti-adhesion performance, product durability, product stability, the regulation precision, the uniformity that improves the hydrogen proportional valve.

Drawings

Fig. 1 is a schematic view of the open state of the present invention.

Fig. 2 is a perspective view of the seal seat member of the present invention.

Fig. 3 is a schematic view of the closed state of the present invention.

In the figure: 1-a sealing gasket insert, 2-a sealing gasket, 3-an annular sealing boss, 4-an annular groove, 5-a limiting surface and 6-a flow passage hole; 7-sealing seat.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the 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 efforts shall belong to the protection scope of the present invention.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-3, the utility model relates to a sealing structure of a hydrogen proportional valve, which comprises a sealing gasket component and a sealing seat component; the sealing gasket component comprises a sealing gasket insert 1 and a sealing gasket 2, and the lower end of the sealing gasket insert 1 is positioned in the sealing gasket 2;

the sealing seat component comprises an annular sealing boss 3, an annular groove 4, a limiting surface 5, a flow passage hole 6 and a sealing seat 7, wherein the flow passage hole 6 is arranged in the sealing seat 7, the upper end surface of the sealing seat 7 is the limiting surface 5, and the annular sealing boss 3 protrudes out of the limiting surface 5 and is positioned on the inner side of the limiting surface 5; an annular groove is formed in the outer side of the annular sealing boss 3;

specifically, the design of the annular groove 4 of the sealing seat accommodates the compression deformation of the sealing gasket 2, ensures that the sealing gasket 2 is tightly combined with the annular sealing boss 3, and ensures the sealing reliability;

the annular groove 4 and the limiting surface 5 are designed, so that the deformation of the sealing gasket 2 except the sealing gasket contacting with the annular sealing boss 3 is reduced, when the valve is opened, the sealing gasket 2 is separated from the sealing seat 7, the deformation of the sealing gasket 2 is small, the influence on a flow channel is weak, and the consistency and the precision of the flow and the pressure of the conveyed gas are ensured; meanwhile, the whole deformation of the sealing gasket 2 is small, and the area of the annular sealing boss 5 is small, so that even under the conditions of high temperature and low temperature, the surface of the sealing gasket 2 is not easy to be sunken due to hardening, and the sealing gasket 2 is prevented from being adhered to the sealing seat 7.

Preferably, the lower end of the sealing gasket insert 1 is provided with an annular protrusion, the sealing gasket 2 is provided with an annular caulking groove capable of being matched with the annular protrusion, and the sealing gasket insert 1 and the sealing gasket 2 are connected into an integrated structure by utilizing the annular protrusion and the annular caulking groove; specifically, such sealed 2 stability of filling up is strong, receives the influence of gas medium pressure variation when having avoided hydrogen proportional valve to use for sealed 2 atress inequality leads to droing, has improved seal structure's reliability.

Preferably, the end part of the annular sealing boss 3 is in circular arc transition; the joint part of the annular groove 4 and the limiting surface 5 is rounded; specifically, the end part of the annular sealing boss 3 is in arc transition, so that the area of the annular sealing boss 3 is reduced, the contact area between the sealing gasket 2 and the limiting surface 5 is reduced, the pressure of the sealing seat on the sealing gasket 2 is larger, and the sealing performance can be enhanced; meanwhile, because the hydrogen proportion has high use frequency, the design of the fillet avoids the sealing gasket 2 from being cut, and the service life of the sealing gasket 2 is prolonged.

The working process of the utility model is as follows:

when the hydrogen proportional electromagnetic valve is powered off, the sealing gasket 2 and the annular sealing boss 3 are contacted with each other to keep sealing under the action of a pre-tightening force, so that the hydrogen proportional electromagnetic valve plays a role in preventing hydrogen from flowing and leaking; the design of the annular groove 4 and the flow passage hole 6 accommodate the compression deformation of the sealing gasket 2, so that the sealing gasket 2 is tightly combined with the annular sealing boss 3;

when the hydrogen proportional valve is electrified, the sealing gasket part is separated from the sealing seat part, the deformation of the sealing gasket 2 is small, the influence on the flow channel is weak, and the consistency and the precision of the flow and the pressure of the conveyed gas are ensured; meanwhile, the whole deformation of the sealing gasket 2 is small, and the area of the annular sealing boss 3 is small, so that even if the sealing gasket 2 deforms under high and low temperature conditions, the surface is not easy to dent, and the sealing gasket 2 is prevented from being adhered to the sealing seat 7; meanwhile, when the hydrogen proportional valve is opened, gas flows into the flow passage hole 6, so that the pressure fluctuation around the sealing gasket 2 is caused; because the sealing gasket insert 1 and the sealing gasket 2 are vulcanized into a whole, the sealing gasket 2 has strong stability, and the falling phenomenon caused by the pressure fluctuation of the sealing gasket 2 is avoided.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A sealing structure of a hydrogen proportional valve is characterized by comprising a sealing gasket component and a sealing seat component; the sealing gasket component comprises a sealing gasket insert (1) and a sealing gasket (2), and the lower end of the sealing gasket insert (1) is positioned in the sealing gasket (2);

the sealing seat component comprises an annular sealing boss (3), an annular groove (4), a limiting surface (5), a flow passage hole (6) and a sealing seat (7), the flow passage hole (6) is formed in the sealing seat (7), the upper end surface of the sealing seat (7) is the limiting surface (5), and the annular sealing boss (3) protrudes out of the limiting surface (5) and is positioned on the inner side of the limiting surface (5); and an annular groove is formed in the outer side of the annular sealing boss (3).

2. A hydrogen proportional valve sealing structure as claimed in claim 1, wherein: the lower extreme of sealed pad inserts (1) sets up annular protrusion set up the annular caulking groove that can match with annular protrusion on sealed pad (2), sealed pad inserts (1) utilizes annular protrusion and annular caulking groove to be connected the structure as an organic whole with sealed pad (2).

3. A hydrogen proportional valve sealing structure according to claim 1, wherein: the end part of the annular sealing boss (3) is in arc transition.

4. A hydrogen proportional valve sealing structure as claimed in claim 1, wherein: and the joint part of the annular groove (4) and the limiting surface (5) is rounded.