CN210461680U

CN210461680U - Nuclear-grade metal graphite sealing gasket

Info

Publication number: CN210461680U
Application number: CN201920654626.2U
Authority: CN
Inventors: 潘建峰
Original assignee: Jiangsu Haiyun Automation Technology Co ltd
Current assignee: Jiangsu Haiyun Automation Technology Co ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-05-05
Anticipated expiration: 2029-05-08

Abstract

The utility model relates to the field of nuclear power plant equipment sealing elements, in particular to a nuclear-grade metal graphite sealing gasket, which comprises a metal outer ring, a graphite ring and a metal inner ring, wherein V-shaped grooves are formed in the inner side surface of the metal outer ring and the outer side of the metal inner ring, the graphite ring is in a circular ring shape with flanges on two sides, the flanges are correspondingly matched with the V-shaped grooves in shape and size, and the graphite ring is fixed in the middle of the metal outer ring and the metal inner ring; has the advantages that: through "V" shape recess with the graphite ring be fixed in between metal outer loop, the metal inner ring, compare the fixed mode through the rectangle recess among the prior art, the graphite ring increases with metal outer loop, the inner ring's of metal area of contact, and the depth of contact is also great to effectively prevent in the use, because the pipeline warp the aversion, have the shearing force to graphite, easily lead to the problem that graphite drops.

Description

Nuclear-grade metal graphite sealing gasket

Technical Field

The utility model belongs to the technical field of nuclear power plant's equipment sealing member and specifically relates to a nuclear level metal graphite seal gasket.

Background

Seals have found wide application in the design of structures, systems and components (SSC) in nuclear power plants, including mainly: the sealing ring is used for sealing a sealing door required by maintaining a structure, sealing a pipeline flange in a process fluid system, sealing flanges on various pressure-bearing equipment, and particularly sealing a top cover of a nuclear power plant core equipment-nuclear reactor core pressure vessel. The selection of the sealing gasket for the pipeline flange is closely related to the medium, design temperature and design pressure of a fluid system in which the flange is positioned, the product needs to be used for a long time in a high-temperature, high-pressure and high-radioactivity environment, and the performance requirement of the product is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: for having solved metal graphite seal gasket current technology and adopting at the metal outer loop, the metal inner ring sets up the structure that the rectangle recess comes the fixed seal graphite ring, in the installation use, because the pipeline warp the aversion, there is the shearing force to graphite, easily leads to the problem that graphite drops, the utility model provides a nuclear level metal graphite seal gasket is fixed in the metal outer loop with the graphite ring through "V" shape recess, technical scheme between the metal inner ring, compares the mode fixed through the rectangle recess among the prior art, and graphite ring and metal outer loop, the inner ring's area of contact increase, and depth of contact is also great to effectively prevent in the use, because the pipeline warp the aversion, have the shearing force to graphite, easily lead to the problem that graphite drops.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a nuclear level metal graphite seal gasket, includes metal inner ring, graphite ring, metal outer loop, metal inner ring outward flange is provided with the first recess of "V" shape, metal outer loop medial surface is provided with "V" shape second recess, the graphite ring is the ring form that both sides are equipped with the chimb, the chimb with first recess, the corresponding matching of second recess shape size, the graphite ring is fixed in the metal inner ring in the middle of the metal outer loop. The graphite ring is fixed between the metal outer ring and the metal inner ring through the V-shaped groove, the contact area of the graphite ring with the metal outer ring and the metal inner ring is increased, and the contact depth is large, so that the problem that graphite falls off easily due to shearing force on graphite caused by deformation and displacement of a pipeline in the use process of a product is effectively solved.

Specifically, the shape and the size of the V-shaped first groove and the V-shaped second groove are the same, the included angle of two sides of each groove is 60 degrees, and the bottoms of the grooves are connected by smooth arcs. The 60-degree oblique angle design ensures the contact depth and the contact area of the graphite ring and the metal inner ring and the metal outer ring, the graphite ring is not easy to fall off, the product reliability is high, the processing difficulty is considered, the realization is easy, the process stability is high, the size of the minimum position of the side edge of the product designed in the way is 0.8mm, and the cutting depth is 1.4 mm.

Specifically, the outer edge of the metal outer ring is provided with a small chamfer, and the periphery of the metal outer ring is smooth and round. The design ensures flexible matching with other parts, and the appearance is beautiful and the hand feeling is smooth.

Specifically, the metal outer ring and the metal inner ring are made of stainless steel, and include 316L, 304 and 304L.

Specifically, the graphite ring is made of a flexible graphite plate material.

The utility model has the advantages that: the utility model provides a nuclear grade metal graphite sealing gasket, which comprises a metal inner ring, a graphite ring and a metal outer ring, wherein the outer edge of the metal inner ring is provided with a V-shaped first groove, the inner side surface of the metal outer ring is provided with a V-shaped second groove, the graphite ring is in a ring shape with convex edges at two sides, the convex edges are correspondingly matched with the shapes and the sizes of the first groove and the second groove, the graphite ring is fixed on the metal inner ring and the middle of the metal outer ring, the technical proposal that the structure that the metal outer ring and the metal inner ring are provided with rectangular grooves to fix the sealed graphite ring is adopted in the prior art is solved, the technical problem that the graphite falls off is easily caused by shearing force on the graphite due to the deformation and displacement of a pipeline in the installation and use processes, and the technical proposal that the graphite ring is fixed between the metal outer ring and the metal inner, the contact area of the graphite ring with the metal outer ring and the metal inner ring is increased, and the contact depth is large, so that the problem that graphite falls off in the use process is effectively solved, the sealed graphite ring is not prone to falling off, and the product reliability is high.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of the metal outer ring and the metal inner ring of the present invention;

fig. 3 is a schematic view of the structure of the graphite ring of the present invention;

fig. 4 is a schematic cross-sectional view of the present invention;

in the figure: 1. a metal inner ring; 2. a graphite ring; 3. a metal outer ring; 4. a first groove; 5. a second groove; 6. a convex edge.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Example (b):

as shown in fig. 1, 2, 3, and 4, the nuclear-grade metal graphite sealing gasket comprises a metal inner ring 1, a graphite ring 2, and a metal outer ring 3, wherein a V-shaped first groove 4 is formed in the outer edge of the metal inner ring 1, a V-shaped second groove 5 is formed in the inner side surface of the metal outer ring 3, the graphite ring 2 is in a ring shape with flanges 6 on both sides, the flanges 6 are correspondingly matched with the first groove 4 and the second groove 5 in shape and size, and the graphite ring 2 is fixed between the metal inner ring 1 and the metal outer ring 3.

Preferably, the V-shaped first grooves 4 and the V-shaped second grooves 5 are the same in shape and size, the included angles of the two sides of each groove are 60 degrees, and the bottoms of the grooves are connected by smooth arcs.

Preferably, the outer edge of the metal outer ring 3 is provided with a small chamfer, and the periphery of the metal outer ring is smooth and round.

Preferably, the metal inner ring 1 and the metal outer ring 3 are made of stainless steel, including 316L, 304 and 304L.

Preferably, graphite ring 2 is a flexible graphite sheet material.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A nuclear grade metal graphite sealing gasket is characterized in that: including metal inner ring (1), graphite ring (2), metal outer ring (3), metal inner ring (1) outward flange is provided with "V" shape first recess (4), metal outer ring (3) medial surface is provided with "V" shape second recess (5), graphite ring (2) are the ring form that both sides are equipped with chimb (6), chimb (6) with first recess (4), the corresponding matching of second recess (5) shape size, graphite ring (2) are fixed in metal inner ring (1) in the middle of metal outer ring (3).

2. The nuclear grade metal graphite gasket seal of claim 1, wherein: the V-shaped first groove (4) and the V-shaped second groove (5) are the same in shape and size, included angles on two sides of the grooves are both 60 degrees, and the bottoms of the grooves are connected by smooth arcs.

3. The nuclear grade metal graphite gasket seal of claim 1, wherein: the outer edge of the metal outer ring (3) is provided with a small chamfer, and the periphery of the metal outer ring is smooth and mellow.

4. The nuclear grade metal graphite gasket seal of claim 1, wherein: the metal inner ring (1) and the metal outer ring (3) are made of stainless steel materials and comprise 316L, 304L and 304L.

5. The nuclear grade metal graphite gasket seal of claim 1, wherein: the graphite ring (2) is made of a flexible graphite plate material.