Sealing ring for sealing graphite tube and tube plate

Abstract

The utility model relates to a sealing ring for sealing a graphite pipe and a pipe plate, which comprises a sealing main body, and the appearance of the sealing main body is any one of a square, a circle and an ellipse. The sealing body is of an integrated structure in sealed connection, a sealing groove is formed in the bottom face of the sealing body, expansion filler is arranged in the sealing groove, and particularly, the expansion filler is sodium polyacrylate. After the sealing ring is assembled, initial sealing with low pressure is formed, the expansion filler is expanded when meeting water in a water pressure test, the sealing pressure is increased, the designed sealing pressure is achieved, and therefore the high sealing effect is achieved. Compared with a graphite heat exchanger adopting an O-shaped sealing ring, the graphite heat exchanger adopting the sealing ring is simpler in structure and high in practicability, the tube bank density can be increased by more than 40%, the appearance of the heat exchanger is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite production equipment, in particular to a sealing ring for sealing a graphite tube and a tube sheet. Background Technique

[0002] In current graphite heat exchangers, when sealing a graphite tube and a tube sheet, due to the lubricating effect of graphite, the O-ring used needs to cooperate with other components such as pressure rings and retaining rings for sealing. Its sealing structure is complex and the tube arrangement density is low. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sealing ring for sealing a graphite tube and a tube sheet to solve the problems encountered in the above background technique.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A sealing ring for sealing a graphite tube and a tube sheet includes a sealing main body. The outer shape of the sealing main body is any one of a square, a circle, and an ellipse. The sealing main body is an integrally closed structure. A sealing groove is opened on the bottom surface of the sealing main body, and an expansion filler is arranged in the sealing groove. Specifically, the expansion filler is sodium polyacrylate.

[0006] In the above solution, during implementation, a graphite tube slot is arranged in the upper part of the inner cavity of the sealing main body, and a tube sheet sealing groove is arranged in the upper part of the inner cavity of the sealing main body. The graphite tube slot and the tube sheet sealing groove form a stepped structure on the inner cavity of the sealing main body.

[0007] In addition, as a preferred solution, there is a gap on the bottom surface of the sealing groove filled with the expansion filler, and a sealing gasket is installed in the gap.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: By arranging a sealing groove on the bottom surface of the sealing main body and an expansion filler in the sealing groove, and the expansion filler is sodium polyacrylate. The expansion filler expands when encountering water, thereby improving the sealing performance of the sealing main body. After the sealing ring is assembled, an initial seal with a lower pressure is formed. When undergoing a hydrostatic test, the expansion filler expands when encountering water, increasing the sealing pressure and reaching the designed sealing pressure, thus playing a highly sealing role. Compared with the graphite heat exchanger using an O-ring, the graphite heat exchanger using this type of sealing ring has a simpler structure, stronger practicability, the tube arrangement density can be increased by more than 40%, the external shape of the heat exchanger is reduced, the cost is decreased, and the assembly and maintenance are convenient. Description of the Drawings

[0009] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0010] Figure 1 is a schematic structural diagram of the present utility model;

[0011] Figure 2 is a schematic top view structural diagram of the present utility model;

[0012] Reference numerals in the figure: 1 - sealing body; 2 - sealing groove; 3 - expansion packing; 4 - graphite tube grooving; 5 - tube sheet sealing groove; 6 - void. Detailed implementation manners

[0013] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the relevant components of the present utility model.

[0014] According to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural forms and implementation manners that can be mutually replaced. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0015] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Embodiment 1, as Figure 1 and Figure 2 shown, a sealing ring for sealing a graphite tube and a tube sheet includes a sealing body 1. The sealing body 1 is made of a corrosion-resistant rubber material. The sealing body 1 is an integrally closed connection structure. As a preferred solution, the outer shape of the sealing body 1 can be any one of a square, a circle, and an ellipse, and can be used as a sealing structure to be installed at the connection between the graphite tube and the tube sheet.

[0017] A sealing groove 2 is provided on the bottom surface of the sealing body 1, and an expansion filler is provided in the sealing groove 2. The expansion filler is sodium polyacrylate. The expansion filler expands when encountering water, thereby improving the sealing performance of the sealing body 1. After the sealing ring is assembled, an initial seal with a relatively low pressure is formed. When a hydrostatic test is carried out, the expansion filler expands when encountering water, and the sealing pressure increases to reach the designed sealing pressure, thus playing a highly sealing role. Compared with the graphite heat exchanger using an O-ring seal, the graphite heat exchanger using this type of sealing ring has a simpler structure, stronger practicability, the tube arrangement density can be increased by more than 40%, the appearance of the heat exchanger is reduced, the cost is decreased, and the assembly and maintenance are convenient.

[0018] During implementation, a graphite tube slot 4 is provided in the upper part of the inner cavity of the sealing body 1, and a tube sheet sealing groove 5 is provided in the upper part of the inner cavity of the sealing body 1. The graphite tube slot 4 and the tube sheet sealing groove 5 form a stepped structure on the inner cavity of the sealing body 1. The graphite tube is installed in the graphite tube slot 4, and the tube sheet is installed in the tube sheet sealing groove 5, and an extrusion force is formed under the action of the expansion filler to seal it.

[0019] Embodiment 2, on the basis of Embodiment 1, a gap 6 is provided on the bottom surface of the sealing groove 2 filled with the expansion filler. The gap 6 can provide necessary space for the expansion of the expansion filler. As a preferred solution, a sealing gasket (not shown) is installed in the gap 6 to level the position where the tube sheet is installed, and the sealing gasket closely abuts against the tube sheet in the state where the expansion filler expands.

[0020] This type of sealing ring can be used in graphite heat exchangers, and can also be applied in heat exchangers such as silicon carbide, ceramics, and glass. The material of the sealing body 1 can be rubber or other materials such as tetrafluoroethylene and polypropylene. An expansion filler is provided in the sealing groove 2 of this type of sealing ring. The expansion filler is a water-swellable material (sodium polyacrylate), which is usually used as a filler for diapers and sanitary napkins, or can also be an expansion material triggered by other conditions.

[0021] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A sealing ring for sealing a graphite tube and a tube sheet, comprising a sealing body (1), wherein the sealing body (1) is an integral structure with a hermetically connected structure, and is characterized in that: A sealing groove (2) is provided on the bottom surface of the sealing body (1), and an expansion filler is provided in the sealing groove (2).

2. A sealing ring for sealing a graphite tube and a tube sheet according to claim 1, characterized in that: A graphite tube slot (4) is provided at the upper part of the inner cavity of the sealing body (1), and a tube sheet sealing slot (5) is provided at the lower part of the inner cavity of the sealing body (1); the graphite tube slot (4) and the tube sheet sealing slot (5) form a step-like structure on the inner cavity of the sealing body (1).

3. The sealing ring for sealing a graphite tube and a tube sheet according to claim 1, characterized in that: The outer shape of the sealing body (1) is any one of square, circular and elliptical.

4. The sealing ring for sealing a graphite tube and a tube sheet according to claim 1, characterized in that: The expansion filler is sodium polyacrylate.

5. The sealing ring for sealing a graphite tube and a tube sheet according to claim 1, characterized in that: A gap (6) is provided on the bottom surface of the sealing groove (2) after the expansion filler is filled.

6. A sealing ring for sealing a graphite tube and a tube sheet according to claim 5, characterized in that: A sealing gasket is installed in the gap (6).

Images