High-temperature-resistant graphite packing sealing element

Abstract

The utility model discloses a high-temperature-resistant graphite packing sealing element which comprises a graphite sealing element, a fiber interwoven body is arranged in the graphite sealing element, the fiber interwoven body is formed by interweaving high-temperature-resistant fibers, and thermal expansion particles are arranged in fiber gaps of the fiber interwoven body. And the fiber interwoven body is high silica cloth. The thermal expansion particles are vermiculite particles. The thermal expansion particles are embedded in the fiber gaps, and the thermal expansion particles in the fiber gaps correspondingly extrude the connected high-temperature-resistant fibers. Graphite components in the graphite sealing piece permeate into fiber gaps of the fiber interwoven body, and the fiber gaps of the fiber interwoven body are jointly filled with the graphite components and the thermal expansion particles. The graphite sealing piece is a graphite packing ring, and the fiber interwoven body is in a strip-shaped winding shape in the graphite sealing piece. And the fiber interwoven body is wound for at least one complete circle in the graphite sealing piece. The graphite packing ring disclosed by the utility model has good high-temperature resistance.

Description

Technical Field

[0001] The utility model relates to the field of graphite packing seals, in particular to high temperature resistant graphite packing seals. Background Art

[0002] Graphite packing ring is a commonly used seal. It has the characteristics of high temperature resistance, corrosion resistance and self-lubrication. It is widely used in the sealing of pumps, valves, etc. in various industries. In some fields, the high temperature resistance demand for graphite packing rings is high, and graphite packing rings containing only graphite components are difficult to meet the demand. Therefore, improvements are proposed to the existing graphite packing rings to improve their high temperature resistance. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a high temperature resistant graphite packing seal, aiming to improve the high temperature resistance of the graphite packing ring.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a high-temperature resistant graphite filler seal, including a graphite seal, wherein the graphite seal has a fiber interweaving body, the fiber interweaving body is interwoven with high-temperature resistant fibers, and the fiber gaps of the fiber interweaving body contain heat-expanding particles; the heat-expanding particles are embedded in the fiber gaps, and the heat-expanding particles in the fiber gaps correspond to the high-temperature resistant fibers that are extruded and connected; the graphite component in the graphite seal penetrates into the fiber gaps of the fiber interweaving body, and the graphite component and the heat-expanding particles together fill the fiber gaps of the fiber interweaving body.

[0005] Furthermore, the fiber interweaving body is high silica cloth.

[0006] Furthermore, the thermal expansion particles are vermiculite particles.

[0007] Furthermore, the graphite seal is a graphite packing ring, and the fiber interweaving body is in a strip-shaped winding shape inside the graphite seal.

[0008] Furthermore, the fiber interweaving body is wound at least one complete circle in the graphite seal.

[0009] Furthermore, a portion of the fiber interlaced body is exposed on the outer surface of the graphite seal, and the exposed portion of the fiber interlaced body completely covers the outer surface of the graphite seal.

[0010] Furthermore, a portion of the fiber interlaced body is exposed on the outer surface of the graphite seal, and the exposed portion of the fiber interlaced body half covers the outer surface of the graphite seal.

[0011] Furthermore, the fiber interweaving body is entirely located inside the graphite seal.

[0012] Beneficial effects: The high-temperature resistant graphite packing seal of the utility model is provided with high-silica cloth in the graphite seal, and vermiculite particles are arranged in the fiber gaps of the high-silica cloth. The high-silica cloth has high-temperature resistance, and the vermiculite particles expand when heated, thereby opening the fiber gaps of the high-silica cloth. The high-silica cloth and the vermiculite particles cooperate, not only making the graphite packing ring have good high-temperature resistance, but also after the vermiculite particles expand when heated, the graphite packing ring fits more closely to the sealing object, thereby achieving a better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic structural diagram of the high temperature resistant graphite packing seal of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] As attached Figure 1 The high temperature resistant graphite packing seal comprises a graphite seal 1, wherein a fiber interweaving body 2 is provided in the graphite seal 1, wherein the fiber interweaving body 2 is interweaved with high temperature resistant fibers, and heat expansion particles are provided in the fiber gaps of the fiber interweaving body 2. The high temperature resistant fibers can improve the high temperature resistance of the graphite seal 1, and after the heat expansion particles are expanded by heat, the graphite seal 1 can be more closely fitted to the sealed object, thereby improving the sealing effect.

[0016] The thermal expansion particles are embedded in the fiber gaps, and the thermal expansion particles in the fiber gaps correspond to the high temperature resistant fibers that are extruded and connected. When the thermal expansion particles are thermally expanded, the thermal expansion particles further extrude the connected high temperature limiters. The thermal expansion particles are squeezed into the fiber gaps by extrusion, so that the thermal expansion particles are stably present in the fiber interlaced body 2.

[0017] The graphite component in the graphite seal 1 penetrates into the fiber gaps of the fiber interlaced body 2, and the graphite component and the thermal expansion particles together fill the fiber gaps of the fiber interlaced body 2. Since the fiber gaps are filled, when the thermal expansion particles expand due to heat, the graphite seal 1 will also expand accordingly, so that the graphite seal 1 and the sealed object fit more closely.

[0018] In one embodiment, the fiber interlaced body 2 is partially exposed on the outer surface of the graphite seal 1, and the exposed portion of the fiber interlaced body 2 completely covers the outer surface of the graphite seal 1, and the graphite component penetrates into the gaps of the fiber interlaced body 2, so that the surface of the graphite seal 1 still has the graphite component. Since the fiber interlaced body 2 completely covers the outer surface of the graphite seal 1, the graphite seal 1 has excellent high temperature resistance, and when the thermal expansion particles are heated and expanded, the gaps of the fiber interlaced body 2 are squeezed, which can further improve the high temperature resistance of the graphite seal 1.

[0019] In one embodiment, the fiber interlaced body 2 is partially exposed on the outer surface of the graphite seal 1, and the exposed portion of the fiber interlaced body 2 half covers the outer surface of the graphite seal 1. Since the fiber interlaced body 2 half covers the outer surface of the graphite seal 1, the graphite component on the surface of the graphite seal 1 is more, so the graphite seal 1 has both high high temperature resistance and good sealing and lubrication performance.

[0020] In one embodiment, the fiber interweaving body 2 is entirely located inside the graphite seal 1, and the surface of the graphite seal 1 is entirely graphite components. Therefore, when the thermally expandable particles expand due to heat, the graphite seal 1 and the sealed object can fit more closely, so that the graphite seal 1 has excellent sealing performance, and the high temperature resistance is also improved to a certain extent.

[0021] In one embodiment, the graphite seal 1 is a graphite packing ring, the fiber interweaving body 2 is in a strip-shaped winding shape in the graphite seal 1, and the fiber interweaving body 2 is at least fully wound in the graphite seal 1. The fiber interweaving body 2 is a high-silica cloth. The thermal expansion particles are vermiculite particles. The manufacturing process is as follows: prepare a vermiculite suspension, pour the vermiculite suspension on the high-silica cloth, roll the high-silica cloth through a special process, squeeze out the moisture of the high-silica cloth after rolling, and form a material combination of high-silica cloth and vermiculite particles, and then cut the material combination into strips; when pressing the graphite packing ring, put the graphite tape and the material combination cut into strips into a mold for pressing, so as to obtain a high-temperature resistant graphite seal 1.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. High temperature resistant graphite packing seal, characterized by: The invention comprises a graphite seal (1), wherein a fiber interweaving body (2) is provided in the graphite seal (1), the fiber interweaving body (2) is formed by interweaving high temperature resistant fibers, and thermal expansion particles are provided in the fiber gaps of the fiber interweaving body (2); The heat-expanding particles are embedded in the fiber gaps, and the heat-expanding particles in the fiber gaps correspond to the high-temperature resistant fibers that are extruded and connected; The graphite component in the graphite seal (1) penetrates into the fiber gaps of the fiber interlaced body (2), and the graphite component and the thermal expansion particles together fill the fiber gaps of the fiber interlaced body (2).

2. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The fiber interweaving body (2) is a high-silica cloth.

3. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The thermal expansion particles are vermiculite particles.

4. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The graphite seal (1) is a graphite packing ring, and the fiber interweaving body (2) is in a strip-shaped winding shape inside the graphite seal (1).

5. The high temperature resistant graphite packing seal according to claim 4, characterized in that: The fiber interweaving body (2) is wound at least one complete circle inside the graphite sealing member (1).

6. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The fiber interlaced body (2) is partially exposed on the outer surface of the graphite seal (1), and the exposed portion of the fiber interlaced body (2) completely covers the outer surface of the graphite seal (1).

7. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The fiber interlaced body (2) is partially exposed on the outer surface of the graphite seal (1), and the exposed portion of the fiber interlaced body (2) half covers the outer surface of the graphite seal (1).

8. The high temperature resistant graphite packing seal according to claim 1, characterized in that: The fiber interweaving body (2) is entirely located inside the graphite seal (1).

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