Adjustable valve graphite sealing gasket

Abstract

The utility model provides an adjustable valve graphite sealing gasket, and belongs to the technical field of graphite sealing gaskets. Comprising a first graphite pad, and the first graphite pad comprises a plurality of convex blocks arranged in the first graphite pad; and one ends of the elastic strips are arranged in the inner cavity of the first graphite pad, and the other ends of the elastic strips penetrate through the first graphite pad and are connected with the convex blocks. The elastic strip is made of shape memory alloy, elastic force can be automatically adjusted according to changes of temperature and pressure, the protruding block and the groove are in close fit all the time, stability of sealing performance is guaranteed, relative sliding between the graphite pad and the metal ring can be reduced by arranging the protruding block and the groove, and therefore abrasion is reduced. The elasticity of the shape memory alloy elastic strip can buffer the impact force when the valve is opened and closed, and abrasion is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite gaskets, and particularly relates to an adjustable valve graphite gasket. Background Art

[0002] A graphite gasket is a sealing element mainly made of graphite, which is widely used in various industrial fields, especially in equipment such as valves, pumps, and pressure vessels. The graphite gasket has excellent high-temperature resistance, corrosion resistance, and compression elasticity, and can withstand high pressure and the friction of high-speed rotation. During use, the graphite gasket can effectively prevent fluid leakage and ensure the safe operation of the equipment.

[0003] Currently, during the use of the existing graphite gaskets, when the graphite gaskets are in different working environments and the temperature changes or the pressure fluctuates, the sealing performance of the graphite gaskets is often significantly affected, and certain expansion, contraction, or deformation will occur. Therefore, this application provides an adjustable valve graphite gasket to meet the requirements. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an adjustable valve graphite gasket to solve the problem that the sealing performance of the existing graphite gaskets is easily affected when the temperature and pressure change during use.

[0005] To solve the above technical problem, the utility model provides the following technical solutions:

[0006] An adjustable valve graphite gasket, comprising: a first graphite pad, the first graphite pad includes: a plurality of convex blocks provided inside the first graphite pad; a plurality of elastic strips, one end of which is provided in the inner cavity of the first graphite pad, and the other end penetrates the first graphite pad and is connected to the convex blocks; the elastic strips are made of shape memory alloy; a metal ring provided inside the first graphite pad; a plurality of groove bodies provided on the outer surface of the metal ring; the convex blocks are located inside the groove bodies; the metal ring is made of stainless steel or other high-strength metal materials, which is used to enhance the overall structural strength of the graphite pad and provide a supporting role, and stainless steel has good corrosion resistance and mechanical strength.

[0007] The number of the convex blocks, the elastic strips, and the groove bodies matches; an anti-corrosion substance is provided inside the groove bodies.

[0008] It further includes: a graphite packing provided inside the metal ring.

[0009] It further includes: a threaded groove provided on the outer surface of the graphite packing.

[0010] It further includes: a second graphite pad provided inside the graphite packing.

[0011] The inner cavity of the second graphite gasket is provided with connecting ribs, and the connecting ribs are made of shape memory alloy.

[0012] The radius of the top of the first graphite gasket is larger than the radius of the bottom, and the groove body is a straight groove, a curved groove or a wavy groove.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] In the above solution, by setting the elastic strip made of shape memory alloy, the elastic force can be automatically adjusted according to the changes of temperature and pressure, so that the convex block and the groove are always kept in close fit, ensuring the stability of the sealing performance. By setting the convex block and the groove, the relative sliding between the graphite gasket and the metal ring can be reduced, thereby reducing wear. In addition, the elasticity of the shape memory alloy elastic strip can also buffer the impact force when the valve is opened and closed, further reducing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an adjustable valve graphite sealing gasket.

[0016] Figure 2 It is a sectional view of the structure of the first graphite gasket.

[0017] Figure 3 It is a schematic diagram of the structure of the metal ring.

[0018] Figure 4 It is a bottom view of the structure of the second graphite gasket.

[0019] Figure 5 It is Figure 4 an enlarged view of A in

[0020] Figure 6 It is a schematic diagram of the structure of the graphite packing.

[0021] [Reference Signs]

[0022] 1. First graphite gasket; 2. Metal ring; 3. Graphite packing; 4. Second graphite gasket; 5. Groove body; 11. Elastic strip; 12. Convex block; 31. Threaded groove.

[0023] As shown in the figure, in order to clearly show the structure of the embodiments of the present utility model, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present utility model to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will describe in detail an adjustable valve graphite gasket provided by the present utility model in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present utility model.

[0025] As Figure 1 - Figure 6 shown, an embodiment of the present utility model provides an adjustable valve graphite gasket, including: a first graphite gasket 1, the first graphite gasket 1 includes: a plurality of bumps 12 provided inside the first graphite gasket 1; a plurality of elastic strips 11, one end of which is provided in the inner cavity of the first graphite gasket 1, and the other end penetrates the first graphite gasket 1 and is connected to the bump 12; the elastic strip 11 is made of shape memory alloy; a metal ring 2 provided inside the first graphite gasket 1; a plurality of groove bodies 5 provided on the outer surface of the metal ring 2; the bump 12 is located inside the groove body 5.

[0026] By providing the elastic strip 11 and utilizing the characteristics of the shape memory alloy, the length and elastic force are automatically adjusted according to the changes in temperature and pressure. One end of the elastic strip 11 is connected to the bump 12 to provide a pulling force or a pushing force to the bump 12, so that it fits tightly with the groove body 5 on the metal ring 2; by providing the bump 12 and cooperating with the groove body 5 on the metal ring 2 to form a mechanical connection, the bonding force between the first graphite gasket 1 and the metal ring 2 is enhanced; and relative sliding between the first graphite gasket 1 and the metal ring 2 is prevented.

[0027] The numbers of the bumps 12, the elastic strips 11 and the groove bodies 5 match; an anti-corrosion substance is provided inside the groove body 5. By providing the anti-corrosion substance, a protective layer can be formed at the contact part between the groove body 5 and the bump 12 to prevent the metal ring 2 and the bump 12 from being corroded, and reduce the risk of gaps and leakage caused by corrosion.

[0028] It further includes: a graphite packing 3 provided inside the metal ring 2. By providing the graphite packing 3, it has certain elasticity and compressibility and can adapt to different pressure and temperature changes. The graphite packing 3 also provides an additional layer of sealing protection; by providing the metal ring 2, it provides support and protection for the first graphite gasket 1, enhances its overall strength, and at the same time cooperates with the graphite packing 3 to further improve the sealing performance.

[0029] It further includes: a thread groove 31 provided on the outer surface of the graphite packing 3. By providing the thread groove 31, the contact area and friction force between the graphite packing 3 and the metal ring 2 are increased, so that the graphite packing 3 is more stable inside the metal ring 2, is not prone to displacement, and increases the overall compressive capacity of the sealing structure.

[0030] It further includes: a second graphite gasket 4, which is arranged inside the graphite packing 3. By providing the second graphite gasket 4, when the valve is closed, the second graphite gasket 4 will be under pressure and transmit it to the graphite packing 3 through the connecting ribs, further enhancing the sealing effect.

[0031] The inner cavity of the second graphite gasket 4 is provided with connecting ribs made of shape memory alloy. By providing the connecting ribs made of shape memory alloy, it can change its shape according to the changes in temperature and pressure, providing elastic support for the second graphite gasket 4 and realizing the self-adaptive adjustment of the second graphite gasket 4.

[0032] The radius of the top of the first graphite gasket 1 is larger than that of the bottom, and the groove body 5 is a straight groove, a curved groove or a wavy groove. By providing the radius of the top of the first graphite gasket 1 to be larger than that of the bottom, the contact area between the first graphite gasket 1 and other components is increased, improving the sealing stability; by providing the groove body 5 as a straight groove, when the valve is closed, the straight groove can ensure the uniform distribution of pressure on the bumps 12, reducing the situation of local overpressure; when the groove body 5 is a curved groove, it provides a uniform contact surface and is suitable for occasions where a stable sealing pressure is required; when the groove body 5 is a wavy groove, it enhances the elasticity and recovery ability of the graphite gasket. Especially in a high-temperature and high-pressure environment, during the valve opening and closing process, the wavy groove can better absorb the impact force and reduce wear.

[0033] In the technical solution provided by the present utility model, when the valve is in the closed state, if the temperature rises or the pressure increases in the environment, the elastic strip 11 contracts, pulling the bump 12 to embed more tightly into the groove body 5, enhancing the sealing effect; when the temperature drops or the pressure decreases, the elastic strip 11 returns to its original state, maintaining the tightness of the seal; when the valve is opened and closed, the first graphite gasket 1 and the second graphite gasket 4 will be subject to certain friction and wear. The elastic strip 11 and the connecting ribs can play an elastic buffering role, reducing the degree of wear.

[0034] The present utility model covers any substitutions, modifications, equivalent methods and solutions made within the essence and scope of the present utility model. To enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the above preferred embodiments of the present utility model. However, those skilled in the art can fully understand the present utility model without these detailed descriptions. Additionally, to avoid unnecessary confusion to the essence of the present utility model, well-known methods, processes, procedures, components and circuits are not described in detail.

[0035] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An adjustable valve graphite gasket, characterized in that, Comprising: A first graphite gasket (1), the first graphite gasket (1) comprising: A plurality of bumps (12) provided within the first graphite gasket (1); A plurality of elastic strips (11), one end of which is disposed within the inner cavity of the first graphite gasket (1), and the other end penetrates through the first graphite gasket (1) and is connected to the bump (12); The elastic strip (11) is made of a shape memory alloy; A metal ring (2) provided within the first graphite gasket (1); A plurality of groove bodies (5) provided on the outer surface of the metal ring (2); The bump (12) is located within the groove body (5).

2. The adjustable valve graphite gasket according to claim 1, wherein The number of the bumps (12), the elastic strips (11) and the groove bodies (5) matches; An anti-corrosion substance is provided within the groove body (5).

3. The adjustable valve graphite gasket according to claim 1, characterized in that, Further comprising: A graphite packing (3) provided within the metal ring (2).

4. The adjustable valve graphite gasket according to claim 3, characterized in that, Further comprising: A threaded groove (31) provided on the outer surface of the graphite packing (3).

5. The adjustable valve graphite gasket according to claim 3, characterized in that, Further comprising: A second graphite gasket (4) provided within the graphite packing (3).

6. The adjustable valve graphite gasket according to claim 5, characterized in that, A connecting rib is provided within the inner cavity of the second graphite gasket (4), and the connecting rib is made of a shape memory alloy.

7. The adjustable valve graphite gasket according to claim 1, characterized in that, The radius of the top of the first graphite gasket (1) is greater than the radius of the bottom, and the groove body (5) is a straight groove, a curved groove or a wavy groove.

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