CN215370946U

CN215370946U - Self-sealing pad

Info

Publication number: CN215370946U
Application number: CN202121633184.7U
Authority: CN
Inventors: 霍均祥
Original assignee: CHENGDU JUNYING SEALING MATERIALS CO LTD
Current assignee: CHENGDU JUNYING SEALING MATERIALS CO LTD
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-12-31
Anticipated expiration: 2031-07-16

Abstract

The utility model belongs to the technical field of valve packing sealing, and discloses a self-sealing pad which comprises a metal plate groove with an annular structure, a sealing material and a sealing plate; the sealing material is filled in the metal plate groove; the sealing plate is used for sealing the metal trough plate; the inner diameter of one end of the metal plate groove gradually enlarges from the end to the end far away. The utility model can ensure that the sealing material is not contacted with an external medium, thereby improving the oxidation resistance of the sealing material, and the self-sealing pad has higher strength and more excellent rebound resilience by matching the shape of the sealing material.

Description

Self-sealing pad

Technical Field

The utility model belongs to the technical field of valve packing sealing, and particularly relates to a self-sealing gasket.

Background

The existing self-sealing gasket generally comprises a pure graphite self-sealing gasket and a graphite and steel wire mesh self-sealing gasket. The gaskets are generally not high in use temperature and are all disposable; particularly for the sealing gasket containing graphite, the gasket has low strength, is easily affected by pressure to cause the graphite layer to be washed and fall off, and has general sealing performance.

Therefore, the existing self-sealing gasket cannot well solve the key problems of running, overflowing, dripping, leaking and the like due to the sealing property.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, the present invention discloses a self-sealing pad which can ensure that a sealing material does not contact with an external medium, thereby improving the oxidation resistance of the sealing material, and thus, the self-sealing pad has higher strength and better rebound resilience by matching the shape thereof. The specific technical scheme of the utility model is as follows:

a self-sealing pad comprising:

a metal plate groove of annular structure;

the sealing material is filled in the metal plate groove; and

a sealing plate for sealing the metal channel plate;

wherein, the inside diameter of one end of the metal plate groove gradually enlarges from the end to the end.

Because the sealing plate seals the metal plate groove and the sealing material is completely filled in the groove, the sealing gasket can resist high and low pressure, thereby avoiding the leakage of the sealing material and realizing the effects of oxidation resistance and high temperature resistance of the sealing gasket; meanwhile, the inner diameter of one end of the metal plate groove is gradually enlarged from the end close to the end far away from the end, so that the metal plate groove has better resilience when being applied to a valve sealing filler.

Preferably, the metal plate groove comprises a first groove body and a second groove body which are integrally formed; the inner diameter of one end, close to the first groove body, of the second groove body is gradually enlarged towards one end, far away from the first groove body, of the second groove body.

The self-sealing gasket is mainly applied to valve sealing packing, and in terms of the structure of the self-sealing gasket, the inner diameter of the bottom part of the self-sealing gasket is consistent with that of the area in the middle part of the self-sealing gasket, and then the inner diameter of the self-sealing gasket gradually expands in the direction extending towards the top part, so that good resilience is ensured in specific application.

Preferably, the outer diameter of the first groove body is equal to that of the second groove body.

Because the outer diameters of the first groove body and the second groove body are consistent, the overall coordination of the self-sealing gasket is well guaranteed, and the self-sealing gasket is more favorably applied to the specific installation of valve sealing.

Preferably, the width of the notch of the metal plate groove is smaller than the width of the sealing plate.

Because the width of the notch of the metal plate groove is smaller than that of the sealing plate, the sealing plate can cover the whole notch more conveniently, and the sealing of the sealing material is well realized.

Preferably, the sealing plate is welded with the metal plate groove through two annular welding lines in the metal plate groove.

The sealing plate and the metal plate groove are welded by double lines, so that the joint seam between the metal plate and the metal plate cannot be pulled open when the sealing plate and the metal plate groove are subjected to the pretightening force of the bolt, and the sealing performance is improved.

Preferably, the outer edge side and the inner edge side of the sealing plate extend into the two sides of the notch of the metal plate groove by 3-5 mm respectively.

Preferably, the wall thickness of the metal groove plate is 0.2 mm-0.6 mm.

Preferably, the sealing material is made of a mixture of metal and nonmetal.

For a pure non-metallic material, the gasket has an excessively high compression rate and an excessively low rebound rate, so that the sealing effect of the gasket is very poor; due to the flexibility of graphite, the product is easy to crack in the process of manufacturing and forming the product, so that the sealing effect of the product in the using process is influenced; in addition, in the process of product packaging and transportation, the corners of the product are easy to deform due to collision; therefore, after the metal is added, the problem can be well solved, and the sealing material is sealed in the metal trough plate, so that the proper rebound effect of the sealing material is better ensured.

Compared with the prior art, the metal trough plate and the sealing plate are welded in a double-line mode, so that the sealing performance of the sealing gasket on the sealing material is ensured; on the basis, the sealing material and an external medium are ensured not to be contacted, so that the oxidation resistance of the sealing material is improved, and the aim of high temperature resistance is fulfilled; because the metal trough plate is made of metal, the sealing gasket can resist high and low pressure, and cannot leak even if water pressure is applied; the strength of the sealing gasket is increased, so that the sealing gasket is not damaged in the production, transportation, installation, storage and operation processes, and the sealing gasket can be repeatedly used for many times except for a high-temperature high-pressure application scene under special conditions.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a sealing plate according to an embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a bottom view of FIG. 2;

FIG. 5 is a schematic view of another sealing plate according to an embodiment of the present invention;

FIG. 6 is an enlarged view of FIG. 5 at B;

fig. 7 is a top view of fig. 5.

In the figure: 100-sheet metal trough; 101-a first trough body; 102-a second trough body; 103-notches; 200-sealing material; 300-sealing plate; 400-circular weld line.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

In fact, in order to overcome the defects of pure graphite sealing rings, manufacturers add graphite into a steel wire mesh to form a self-sealing gasket at present, although the steel wire mesh is added in the manufacturing process of the gasket, the steel wire mesh serves as a framework, the pressure resistance strength of the gasket is improved, the steel wire mesh can only play a role of the framework inside the gasket, and the manufacturing and using effects of the gasket cannot be greatly changed.

Thus, as shown in fig. 1 to 4, the present embodiment discloses a self-sealing gasket, which includes a metal plate groove 100 of a ring structure, a sealing material 200, and a sealing plate 300; the sealing material 200 is filled in the metal plate groove 100; the sealing plate 300 is used for sealing the metal channel plate; the inner diameter of one end of the sheet metal slot 100 gradually increases from the end close to the end far away from the end; the sealing material 200 is made of a mixture of metal and nonmetal.

In the present embodiment, since the sealing plate 300 is also made of metal, the use stability of the entire structure can be further enhanced by matching the metal plate groove 100 made of metal.

For better use of the present embodiment, the sheet metal trough 100 includes a first trough body 101 and a second trough body 102 which are integrally formed; the inner diameter of one end of the second tank body 102 close to the first tank body 101 gradually expands towards one end of the second tank body 102 far away from the first tank body 101; the outer diameter of the first tank 101 is equal to the outer diameter of the second tank 102.

In the present embodiment, the first tank 101 and the second tank 102 are integrally formed; in fact, the first tank 101 is a hollow cylinder structure, and the second tank 102 is a hollow frustum structure; a groove is formed between the inner wall and the outer wall, and the sealing material 200 is filled in the groove. In this structure, it should be ensured that the outer diameters of the first tank 101 and the second tank 102 are the same, thereby being beneficial to being matched with a valve to realize packing sealing in the practical application process.

It should be noted that, in the above embodiment, the notch 103 of the sheet metal slot 100 is located on the side of the first slot body 101 away from the second slot body 102; in other embodiments, as shown in fig. 5 to 7, the notch 103 may be located on a side of the second slot 102 away from the first slot 101.

For better use of this embodiment, the width of the slot opening 103 of the sheet metal slot 100 is less than the width of the sealing plate 300; the sealing plate 300 is welded to the metal plate groove 100 by two circular weld lines 400 in the metal plate groove 100.

After the sealing material 200 is filled, the sealing plate 300 is inserted into the notch 103 and welded by a spot welder, an argon arc welder, a plasma welder or a laser welder, so that the sealing plate 300 completely covers the notch 103 of the metal plate groove 100, and meanwhile, because the sealing plate 300 is positioned in the notch 103, after the welding is completed, no protruding structure exists at the top of the sealing plate, which affects the specific use, and compared with the special-shaped sealing plate 300, the processing technology of the sealing plate 300 is simpler.

For better use of this embodiment, the outer edge side and the inner edge side of the sealing plate 300 are respectively extended into 3mm to 5mm from both sides of the notch 103 of the sheet metal groove 100.

When the sealing plate 300 is positioned in the metal plate groove 100, the distance between the outer edge side of the sealing plate 300 and the side corresponding to the notch 103 is 3mm to 5mm, and similarly, the distance between the inner edge side of the sealing plate 300 and the side corresponding to the notch 103 is 3mm to 5mm, thereby ensuring that the sealing plate 300 can seal the metal plate groove and ensuring that the sealing material 200 does not contact with an external medium; in this embodiment, the outer edge side and the inner edge side of the sealing plate 300 protrude into both sides of the notch 103 of the sheet metal groove 100 by 4mm, respectively.

For better use of this embodiment, the wall thickness of the metal channel plate is 0.2mm to 0.6 mm.

The proper wall thickness can ensure that the whole sealing ring has proper strength; in the present embodiment, the wall thickness of the metal channel plate is 0.4 mm.

When applying this embodiment to valve seal, because required pretension is all little than other graphite self-sealing pads to alleviate workman intensity of labour, even do hydrostatic test and can not reveal yet, because this pad mainly comprises metal, can be able to bear high low temperature and able to bear high low pressure again, the resilience is good again, has thoroughly solved the key problem of running, dripping, leaking that current sealed pad can not solve.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and these modifications and adaptations should be considered within the scope of the utility model.

Claims

1. A self-sealing mat, comprising:

a metal plate groove of annular structure;

the sealing material is filled in the metal plate groove; and

a sealing plate for sealing the metal channel plate;

2. The self-sealing gasket as claimed in claim 1, wherein said sheet metal channel comprises a first channel body and a second channel body integrally formed; the inner diameter of one end, close to the first groove body, of the second groove body is gradually enlarged towards one end, far away from the first groove body, of the second groove body.

3. The self-sealing gasket as claimed in claim 2, wherein the first channel has an outer diameter equal to an outer diameter of the second channel.

4. The self-sealing mat as claimed in claim 1, wherein the width of the slot opening of the metal plate slot is less than the width of the sealing plate.

5. The self-sealing mat as claimed in claim 4, wherein said sealing plate is welded to the sheet metal groove by two circular weld lines within the sheet metal groove.

6. The self-sealing gasket as claimed in claim 4, wherein the outer edge side and the inner edge side of the sealing plate extend into the groove of the metal plate by 3mm to 5mm, respectively.

7. The self-sealing pad as claimed in any one of claims 1 to 6, wherein the metal channel plate has a wall thickness of 0.2mm to 0.6 mm.

8. The self-sealing mat according to any one of claims 1 to 6, wherein said sealing material is made of a mixture of metal and non-metal.