Novel flexible graphite wave tooth composite gasket

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a novel flexible graphite corrugated tooth composite gasket, which is formed by machining upper corrugated teeth on the upper surface and the lower surface of a planar steel plate or steel belt respectively. Graphite is adhered to the upper surface and the lower surface of the gasket through an adhesive, so that a graphite layer is formed on each of the upper surface and the lower surface of the gasket; a parting strip assembly is further arranged on the inner side of the gasket. When the corrugated tooth gasket is used, the compression ratio of the corrugated tooth gasket can be provided through the graphite layer, the rebound rate of the corrugated tooth gasket can be guaranteed through the gasket metal framework, the gasket can keep strong sealing, and it can be guaranteed that the sealing effect is not affected under the condition of pressure and temperature fluctuation.

Description

Technical Field

[0001] This utility model relates to the technical field of petrochemicals, and in particular to a novel flexible graphite corrugated composite gasket. Background Technology

[0002] In the petrochemical industry, shell-and-tube heat exchangers are often used for cooling materials. The two ends of the shell-and-tube heat exchanger are sealed with end caps, and gaskets are used between the end caps and the shell-and-tube heat exchanger to prevent material leakage.

[0003] The compression and rebound properties of a gasket have a significant impact on its sealing performance, mainly reflected in its ability to compensate for and adapt to load fluctuations. Therefore, the gasket must have both a certain compression rate and a certain rebound rate.

[0004] Traditional gaskets mostly rely on forced sealing, primarily considering only the gasket's compression ratio while neglecting its resilience. Therefore, traditional gaskets have poor sealing performance, and due to their lack of compression resilience, they often leak due to pressure and temperature fluctuations. However, if the gasket's resilience is too high, it often affects its compression ratio, failing to achieve a forced seal. Therefore, to achieve good sealing performance without being affected by pressure and temperature fluctuations, a gasket that maintains both compression ratio and resilience in a balanced way is needed. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a novel flexible graphite corrugated composite gasket that improves sealing performance. It can not only provide the compression ratio of the corrugated gasket through the graphite layer, but also ensure its resilience through the gasket's metal skeleton, so that the gasket can maintain a strong seal and ensure that the sealing effect is not affected under pressure and temperature fluctuations; thus solving the technical problems existing in the prior art.

[0006] This utility model discloses a novel flexible graphite corrugated composite gasket, comprising a gasket composed of a metal skeleton. The gasket is formed by mechanically machining corrugations onto the upper and lower surfaces of a flat steel plate or strip. Graphite is then bonded to the upper and lower surfaces of the gasket using an adhesive, thereby forming a graphite layer on each surface. A spacer assembly is also provided inside the gasket. In use, the spacer assembly divides the gasket into sections, and the gasket is placed between the shell-and-tube heat exchanger and the end cap. The metal skeleton enhances the sealing between the shell-and-tube heat exchanger and the end cap through the upper and lower sets of corrugations. At the same time, the spacer assembly divides the interior of the gasket into regions. The corrugations on the metal skeleton inhibit flange deflection, improve gasket stress distribution, and prevent the gasket from being crushed.

[0007] Preferably, the spacer assembly includes a first strip, which is installed inside the gasket composed of a metal frame; the first strip divides the interior of the gasket into two areas, and at the same time reinforces the interior of the gasket.

[0008] Preferably, the spacer assembly includes a second strip and a first U-shaped strip. One end of the second strip is provided with the first U-shaped strip, and the other end of the second strip and both ends of the first U-shaped strip are respectively connected to the gasket. The second strip and the first U-shaped strip cooperate to partition the inner side of the gasket, while the second strip and the first U-shaped strip cooperate to reinforce the inner side of the gasket.

[0009] Preferably, the spacer assembly includes a No. 3 strip, a No. 2 U-shaped strip, and a No. 4 strip. The No. 3 strip is installed inside the gasket, and a No. 2 U-shaped strip is provided on the No. 3 strip. A set of No. 4 strips is provided at both ends of the No. 2 U-shaped strip, and the other ends of the two sets of No. 4 strips are respectively connected to the gasket. The No. 3 strip, the No. 2 U-shaped strip, and the No. 4 strip cooperate to divide the interior of the gasket into two areas, and at the same time, the No. 3 strip, the No. 2 U-shaped strip, and the No. 4 strip reinforce the gasket.

[0010] Preferably, the spacer assembly includes T-shaped retaining strips and L-shaped retaining strips. The T-shaped retaining strips are installed inside the gasket, and two sets of L-shaped retaining strips are symmetrically arranged on the inner side of the gasket. The T-shaped retaining strips and the two sets of L-shaped retaining strips cooperate to divide the interior of the gasket into four areas, and at the same time, the T-shaped retaining strips and the two sets of L-shaped retaining strips cooperate to reinforce the gasket.

[0011] Preferably, the corrugations are respectively disposed on the upper and lower surfaces of the gasket, and are formed by alternating crests and troughs, wherein the crests and troughs on the upper surface are respectively opposite to the troughs and crests on the lower surface. This allows for better sealing when the gasket is installed between the shell-and-tube heat exchanger and the end cap.

[0012] Preferably, each corrugated tooth has a tooth tip, all tooth tips are in the same plane, all tooth spacing is consistent, and all tooth radius is equal. Furthermore, the tooth tip height is consistent, and the tooth size is consistent, thereby ensuring that the height and size of each crest and trough on the gasket are uniform, thus making the height of the crests and the concavity of the troughs on the gasket consistent.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: it can not only provide the compression ratio of the corrugated gasket through the graphite layer, but also ensure its resilience through the metal skeleton of the gasket, thus ensuring the balance between the compression ratio and resilience of the gasket, enabling the gasket to maintain a strong seal, and also ensuring that the sealing effect is not affected under pressure and temperature fluctuations.

[0014] When a corrugated gasket is used, its corrugations are respectively set on the upper and lower surfaces of the gasket, and are formed by alternating crests and troughs. The crests and troughs on the upper surface are respectively set opposite to the troughs and crests on the lower surface.

[0015] In addition, the spacer assembly divides the gasket, which is composed of a metal skeleton, into sections. The gasket, composed of a metal skeleton, is placed between the shell-and-tube heat exchanger and the end cap to enhance the sealing between the shell-and-tube heat exchanger and the end cap. At the same time, the spacer assembly reinforces the inside of the gasket, which is composed of a metal skeleton. The corrugations on the metal skeleton can suppress flange deflection, improve the stress distribution of the gasket, and prevent the gasket from being crushed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first metal frame of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the second metal frame of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the third metal frame of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the fourth metal frame of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of a gasket formed by combining graphite with a metal skeleton.

[0021] The following are labels in the attached diagram: 1. Metal frame; 2. Corrugated teeth; 3. Strip-shaped retaining strip No. 1; 4. Strip-shaped retaining strip No. 2; 5. U-shaped retaining strip No. 1; 6. Strip-shaped retaining strip No. 3; 7. U-shaped retaining strip No. 2; 8. Strip-shaped retaining strip No. 4; 9. T-shaped retaining strip; 10. L-shaped retaining strip; 11. Gasket; 12. Graphite layer; 13. Positioning ring. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0023] Example 1

[0024] like Figure 1 and Figure 5As shown, a novel flexible graphite corrugated composite gasket of this utility model includes a gasket 11 composed of a metal skeleton 1. The gasket 11 is formed by mechanically machining corrugations on the upper and lower surfaces of a flat steel plate or steel strip. Graphite is then bonded to the upper and lower surfaces of the gasket 11 with an adhesive, thereby forming a graphite layer 12 on the upper and lower surfaces of the gasket 11 respectively.

[0025] A spacer assembly is also provided on the inner side of the gasket 11.

[0026] The corrugations 2 are respectively disposed on the upper and lower surfaces of the gasket 11, and are formed by alternating crests and troughs, wherein the crests and troughs on the upper surface are respectively positioned opposite to the troughs and crests on the lower surface. This allows for better sealing when the gasket 11 is installed between the shell-and-tube heat exchanger and the end cap.

[0027] Each corrugated tooth 2 has a tooth tip, all tooth tips are in the same plane, all corrugated teeth 2 are spaced at the same distance, and all corrugated teeth 2 have the same arc radius. Furthermore, the tooth tip height is made consistent, and the size of the corrugated teeth 2 is consistent, thereby ensuring that the size and height of each crest and trough of the gasket 11 are uniform, thus making the height of the crest and the concavity of the trough on the gasket 11 consistent.

[0028] The spacer assembly includes a first strip 3, which is installed inside the gasket 11.

[0029] A positioning ring 13 is also provided on the outer edge of the gasket 11 to facilitate positioning of the gasket 11 during installation.

[0030] In this embodiment, the compression ratio of the corrugated gasket 11 can be provided by the graphite layer 12, and the rebound rate can be guaranteed by the metal skeleton 1 of the gasket 11. This ensures the balance between the compression ratio and the rebound of the gasket 11, enabling the gasket 11 to maintain a strong seal and ensure that the sealing effect is not affected by pressure and temperature fluctuations.

[0031] When the corrugated gasket 11 is in use, its corrugations are respectively set on the upper and lower surfaces of the gasket 11, and are formed by alternating crests and troughs, with the crests and troughs on the upper surface opposite to the troughs and crests on the lower surface. This allows the gasket 11 to provide better sealing when installed between the shell-and-tube heat exchanger and the end cap.

[0032] In addition, the first strip 3 divides the gasket 11, which is composed of a metal skeleton 1, into sections. The gasket 11 is placed between the shell-and-tube heat exchanger and the end cap. The metal skeleton 1 strengthens the sealing between the shell-and-tube heat exchanger and the end cap through two sets of corrugations 2. At the same time, the first strip 3 divides the interior of the gasket 11 into areas. The corrugations 2 on the metal skeleton 1 suppress flange deflection, improve the stress distribution of the gasket 11, and prevent the gasket 11 from being crushed.

[0033] The compression and resilience properties of the corrugated composite gasket 11 have a significant impact on its sealing performance, primarily affecting its ability to compensate for load fluctuations. Therefore, the gasket 11 must possess both a certain compression ratio and a certain resilience. The compression ratio of the corrugated gasket 11 is mainly provided by the graphite layer 12, while the resilience is primarily ensured by the metal skeleton 1 of the gasket 11.

[0034] Compression ratio indicates the load-bearing capacity of gasket 11, while resilience indicates its resilience. Within a certain range of compressibility, a higher resilience is more beneficial for sealing. Therefore, considering all factors, three types of graphite were selected: Huake 50 mesh, foreign 50 mesh, and foreign 80 mesh. Based on the high-temperature requirements of the adhesive, three adhesives were preferred: 899 type environmentally friendly decorative adhesive, 900 silicone structural sealant, and ALD-64-1 Ailauda. The optimal effect was achieved with a wave depth of 0.7 mm and a wave pitch of 3.5 mm.

[0035] At high temperatures (200℃), gasket 11 achieves good resilience while meeting compression requirements, and the adhesive has minimal impact on its compression and resilience performance. A corrugated composite gasket with a working temperature of 200℃, using 50-mesh Huake graphite and 899 type environmentally friendly decorative adhesive as the adhesive, can achieve good compression and resilience performance. Based on comprehensive analysis, the recommended parameters for gasket 11 are: metal skeleton 1 with a corrugation depth of 0.7mm and a corrugation pitch of 3.5mm; 50-mesh Huake graphite; and 899 type environmentally friendly decorative adhesive as the adhesive. This combination results in gasket 11 with relatively superior mechanical properties.

[0036] Example 2

[0037] like Figure 2 As shown, this utility model discloses a novel flexible graphite corrugated composite gasket, wherein the spacer assembly includes a second strip-shaped clip 4 and a first U-shaped clip 5. One end of the second strip-shaped clip 4 is provided with the first U-shaped clip 5, and the other end of the second strip-shaped clip 4 and both ends of the first U-shaped clip 5 are respectively connected to the gasket 11. Everything else is the same as in Embodiment 1.

[0038] In this embodiment, during use, the second strip 4 and the first U-shaped strip 5 divide the gasket 11 into sections. The gasket 11 is placed between the shell-and-tube heat exchanger and the end cap. The corrugated teeth 2 on the metal frame 1 enhance the sealing between the shell-and-tube heat exchanger and the end cap. At the same time, the second strip 4 and the first U-shaped strip 5 divide the interior of the gasket 11 into areas. The corrugated teeth 2 on the metal frame 1 suppress flange deflection, improve gasket stress distribution, and prevent the gasket 11 from being crushed.

[0039] Example 3

[0040] like Figure 3As shown, this utility model discloses a novel flexible graphite corrugated composite gasket, wherein the spacer assembly includes a third strip 6, a second U-shaped strip 7, and a fourth strip 8. The third strip 6 is installed inside the gasket 11, and the second U-shaped strip 7 is disposed on the third strip 6. A set of fourth strips 8 is disposed at each end of the second U-shaped strip 7, and the other ends of the two sets of fourth strips 8 are respectively connected to the gasket 11. Everything else is the same as in Embodiment 1.

[0041] In this embodiment, during use, the No. 3 strip clip 6, the No. 2 U-shaped clip 7, and the No. 4 strip clip 8 divide the gasket 11 into sections. The gasket 11 is placed between the shell-and-tube heat exchanger and the end cap. The metal frame 1 strengthens the sealing between the shell-and-tube heat exchanger and the end cap by the corrugations 2 set on its upper and lower surfaces. At the same time, the No. 3 strip clip 6, the No. 2 U-shaped clip 7, and the No. 4 strip clip 8 divide the interior of the gasket 11 into areas. The corrugations 2 on the metal frame 1 suppress flange deflection, improve gasket stress distribution, and prevent the gasket 11 from being crushed.

[0042] Example 4

[0043] like Figure 4 As shown, this utility model discloses a novel flexible graphite corrugated composite gasket, wherein the spacer assembly includes T-shaped retaining strips 9 and L-shaped retaining strips 10. The T-shaped retaining strips 9 are installed inside the gasket 11, and two sets of L-shaped retaining strips 10 are symmetrically arranged on the inner side of the gasket 11 along with the T-shaped retaining strips 9. Everything else is the same as in Embodiment 1.

[0044] In this embodiment, during use, the T-shaped retaining strip 9 and the L-shaped retaining strip 10 divide the gasket 11 into sections. The gasket 11 is placed between the shell-and-tube heat exchanger and the end cap. The metal frame 1 strengthens the sealing between the shell-and-tube heat exchanger and the end cap through the upper and lower sets of corrugated teeth 2. At the same time, the T-shaped retaining strip 9 and the L-shaped retaining strip 10 divide the interior of the gasket 11 into areas. The corrugated teeth 2 on the metal frame 1 suppress flange deflection, improve gasket stress distribution, and prevent the gasket from being crushed.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A new flexible graphite wave spring gasket comprising a gasket (11) consisting of a metal skeleton (1), characterized in that, The gasket (11) is formed by machining corrugations on the upper and lower surfaces of a planar steel plate or steel strip, and then bonding graphite to the upper and lower surfaces of the gasket (11) by an adhesive, thereby forming a graphite layer (12) on the upper and lower surfaces of the gasket (11). A spacer assembly is further arranged inside the gasket (11). The corrugations are arranged on the upper and lower surfaces of the gasket (11) and are formed by alternating crests and troughs, wherein the crests and troughs on the upper surface are arranged opposite to the troughs and crests on the lower surface respectively; each corrugation is provided with a tooth tip, all the tooth tips are in one plane, all the corrugations have the same distance, and all the corrugations have the same circular arc radius. The metal skeleton strengthens the sealing between the tube-shell heat exchanger and the head through the upper and lower corrugations, and the spacer assembly divides the gasket into regions, the corrugations on the metal skeleton prevent the flange from deflecting, improve the stress distribution of the gasket, and prevent the gasket from being crushed.

2. A novel flexible graphite wave spring gasket according to claim 1 wherein, The spacer assembly comprises a first strip-shaped clamping strip (3) which is arranged inside the gasket (11).

3. A novel flexible graphite wave spring gasket according to claim 1 wherein, The spacer assembly comprises a second strip-shaped clamping strip (4) and a first U-shaped clamping strip (5), one end of the second strip-shaped clamping strip (4) is provided with the first U-shaped clamping strip (5), and the other end of the second strip-shaped clamping strip (4) is connected with the two ends of the first U-shaped clamping strip (5) respectively.

4. A novel flexible graphite wave spring gasket as set forth in claim 1 wherein, The spacer assembly comprises a third strip-shaped clamping strip (6), a second U-shaped clamping strip (7) and a fourth strip-shaped clamping strip (8), the third strip-shaped clamping strip (6) is arranged inside the gasket (11), the second U-shaped clamping strip (7) is arranged on the third strip-shaped clamping strip (6), the two ends of the second U-shaped clamping strip (7) are respectively provided with a group of fourth strip-shaped clamping strips (8), and the other ends of the two groups of fourth strip-shaped clamping strips (8) are connected with the gasket (11) respectively.

5. A novel flexible graphite wave spring gasket as set forth in claim 1 wherein, The spacer assembly comprises a T-shaped clamping strip (9) and an L-shaped clamping strip (10), the T-shaped clamping strip (9) is arranged inside the gasket (11), and two groups of L-shaped clamping strips (10) are symmetrically arranged inside the gasket (11) and opposite to the T-shaped clamping strip (9).

6. A novel flexible graphite wave spring gasket as described in claim 1 wherein, A positioning ring (13) is further arranged on the outer edge of the gasket (11).

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