Metal graphite winding sealing gasket forming process system and forming process method

Abstract

The application discloses a metal graphite winding sealing gasket forming process system and a forming process method. The metal band and the graphite band can be wound on the winding mechanism to be formed into a winding gasket. The winding mechanism comprises an inner top wheel, and the pressing mechanism comprises an outer top wheel. The inner top wheel and the outer top wheel are arranged on the inner and outer sides of the winding gasket in the forming process to press the metal band and the graphite band on the winding mechanism. There are a plurality of outer top wheels in the pressing mechanism, and each outer top wheel is matched with the inner top wheel to press the outer side of the winding gasket, so that the pressure area of the outer side of the winding gasket is dispersed. The winding mechanism or the pressing mechanism can be moved to change the distance between the inner top wheel and the outer top wheel in the process of thickening of the winding gasket. The application can solve the problem that the internal stress of the finished winding gasket is large and the winding gasket is easy to deform.

Description

Technical Field

[0001] This invention relates to the field of spiral wound gasket manufacturing technology, and in particular to a metal graphite spiral wound sealing gasket forming process system and forming process method. Background Technology

[0002] Spiral wound gaskets are a type of sealing gasket made of alternating layers of metal and graphite tape, primarily used for sealing flange connections. Common equipment for manufacturing spiral wound gaskets is shown in the attached image. Figure 1 As shown, the device consists of a pair of top rollers. A metal strip and a graphite strip are wound around one of the top rollers, while the other top roller presses the metal strip and graphite strip together. During processing, because the outer side of the wound gasket has only one pressure area in contact with the top roller, the metal strip experiences high pressure, resulting in high internal stress in the finished wound gasket, making it prone to deformation or even unraveling. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a metal graphite spiral wound sealing gasket molding process system and molding process method, which aims to solve the problem of high internal stress and easy deformation of the finished spiral wound gasket.

[0004] Technical Solution: To achieve the above objectives, the metal-graphite spiral wound gasket forming process system of the present invention includes a winding mechanism and a pressing mechanism. Metal strips and graphite strips can be wound on the winding mechanism to form a spiral wound gasket. The winding mechanism includes an inner top wheel, and the pressing mechanism includes an outer top wheel. The inner top wheel and the outer top wheel abut against the inner and outer sides of the spiral wound gasket during forming to press the metal strip and graphite strip onto the winding mechanism. The pressing mechanism has a plurality of outer top wheels, each of which cooperates with the inner top wheel to abut against each other, thereby dispersing the pressure area on the outer side of the spiral wound gasket.

[0005] Furthermore, the winding mechanism or the pressing mechanism can be displaced to change the distance between the inner and outer top rollers during the thickening process of the winding gasket.

[0006] Furthermore, the winding mechanism includes an inner top wheel that can rotate actively, with metal strips and graphite strips wound onto the outer surface of the inner top wheel.

[0007] Furthermore, the winding mechanism includes an inner top wheel and several auxiliary winding wheels; the inner top wheel and several auxiliary winding wheels are arranged in a ring, so that the outer wheel surfaces of the inner top wheel and several auxiliary winding wheels are combined to form a ring winding profile, and the metal strip and graphite strip are wound on the ring winding profile respectively.

[0008] Furthermore, there are two outer top rollers, thereby forming an inner pressure zone and two outer pressure zones on the winding gasket; the two outer top rollers are symmetrically distributed on both sides of the inner top roller, so that the two outer pressure zones are symmetrically distributed on both sides of the inner pressure zone.

[0009] Furthermore, the winding mechanism or the pressing mechanism can reciprocate in a straight line, and the displacement direction is consistent with the axis of symmetry of the two outer pressure zones.

[0010] Furthermore, the radius of the outer top wheel is variable; as the winding gasket thickens during the molding process, the radius of the outer top wheel can increase synchronously.

[0011] Furthermore, a thickening strip is connected to the outer top wheel; during the process of the winding gasket forming and thickening, the outer top wheel can rotate actively, and the thickening strip is wound around the outer top wheel, so that the radius of the outer top wheel increases synchronously.

[0012] Furthermore, the end of the thickened belt away from the outer top wheel is connected to the winding wheel; the winding wheel can rotate actively to retract the thickened belt onto the winding wheel, thereby reducing the radius of the outer top wheel.

[0013] A method for forming a metal graphite spiral wound gasket involves the following steps: During the gradual thickening of the gasket on a winding mechanism, the outer top roller actively rotates, winding the thickening tape onto it, thus increasing the radius of the outer top roller. Simultaneously, the winding mechanism or clamping mechanism moves, adaptively increasing the distance between the inner and outer top rollers. After the gasket is formed and removed from the winding mechanism, the take-up roller actively rotates, retracting the thickening tape onto it, reducing and restoring the radius of the outer top roller. Correspondingly, the winding mechanism or clamping mechanism moves, reducing and restoring the distance between the inner and outer top rollers.

[0014] Beneficial effects: The metal graphite spiral wound sealing gasket molding system and molding method of the present invention have the following beneficial effects: 1) The top rollers on the outside of the spiral wound gasket were changed from one to two or more, which created several pressure zones on the outside of the spiral wound gasket. The pressure was dispersed, and the pressure on the metal strip during processing was reduced. The internal stress of the finished spiral wound gasket was small and it was not easy to deform. 2) During the process of the spiral wound gasket thickening, the radius of the outer top roller will gradually increase, which increases the actual contact area between the top roller and the spiral wound gasket, thus dispersing the pressure and reducing the stress on the metal strip. Attached Figure Description

[0015] Appendix Figure 1 A schematic diagram of existing spiral wound gasket processing equipment; Appendix Figure 2 This is a schematic diagram of an embodiment where the winding mechanism includes only the inner top wheel; Appendix Figure 3 This is a schematic diagram of an embodiment of a winding mechanism including an inner top wheel and an auxiliary winding wheel; Appendix Figure 4This is a schematic diagram showing the connection between the outer top roller, the thickened belt, and the winding roller; Appendix Figure 5 This is a schematic diagram of the outer pressure zone. Detailed Implementation

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] As attached Figures 1 to 5 The aforementioned metal-graphite spiral wound gasket forming system includes a winding mechanism, a pressing mechanism, and a feeding mechanism. The feeding mechanism supplies metal strip 2 and graphite strip 3 to the winding mechanism. In one embodiment, the metal strip 2 is a steel strip. The metal strip 2 and graphite strip 3 are wound onto the winding mechanism, gradually forming a spiral wound gasket 1. The winding mechanism includes an inner top wheel 4, and the pressing mechanism includes an outer top wheel 5. During the forming process of the spiral wound gasket 1, the inner top wheel 4 and the outer top wheel 5 press against the inner and outer sides of the spiral wound gasket 1 to press the metal strip 2 and graphite strip 3 onto the winding mechanism, thereby pressing the metal strip 2 and graphite strip 3 into the spiral wound gasket 1.

[0018] The commonly used processing and manufacturing equipment for spiral wound gaskets 1 is shown in the attached figure. Figure 1 As shown, there is only one outer top wheel 5. Therefore, during the processing of the spiral wound gasket 1, there is only one outer pressure area 10 on the spiral wound gasket 1. As a result, the pressure on the outer side of the spiral wound gasket 1 is relatively large, which leads to high internal stress in the finished spiral wound gasket 1, making it easy to deform or even break apart.

[0019] In this invention, the clamping mechanism has several smaller outer top rollers 5, each of which engages with the inner top roller 4 to abut against each other, thereby dispersing the outer pressure area 10 of the wound gasket 1. Because the number of outer pressure areas 10 of the wound gasket 1 is increased, the pressure is correspondingly dispersed, and the pressure in a single outer pressure area 10 decreases. Therefore, the internal stress of the finished wound gasket 1 is reduced, making it less prone to deformation.

[0020] The winding mechanism or the clamping mechanism is movable, for example, the winding mechanism or the clamping mechanism is mounted on a sliding seat, so that the winding mechanism or the clamping mechanism can be slidably adjusted. During the forming process of the winding gasket 1, the winding gasket 1 will gradually become thicker, and correspondingly, the winding mechanism or the clamping mechanism will also be movable, changing the distance between the inner top wheel 4 and the outer top wheel 5, so that the distance between the inner top wheel 4 and the outer top wheel 5 is adapted to the thickness of the winding gasket 1, ensuring that the inner top wheel 4 and the outer top wheel 5 can cooperate to clamp the metal strip 2 and the graphite strip 3.

[0021] One implementation, for example, is attached. Figure 2As shown, the winding mechanism includes only the inner top wheel 4, which can rotate actively. The metal strip 2 and graphite strip 3 are wound onto the outer surface of the inner top wheel 4. In this embodiment, the entire outer surface of the inner top wheel 4 is in contact with the winding gasket 1. The winding mechanism in this embodiment is mostly used for processing small winding gaskets 1.

[0022] One implementation, for example, is attached. Figure 3 As shown, the winding mechanism includes an inner top wheel 4 and several auxiliary winding wheels 6, wherein the inner top wheel 4 can also rotate actively. The inner top wheel 4 and the several auxiliary winding wheels 6 are arranged in a ring, so that the outer surfaces of the inner top wheel 4 and the several auxiliary winding wheels 6 combine to form a ring winding profile, and the metal strip 2 and the graphite strip 3 are wound on the ring winding profile. In this embodiment, the winding gasket 1 has only one contact area with the outer surface of the inner top wheel 4, which is called the inner pressure area 9 of the winding gasket 1. The winding mechanism in this embodiment is mostly used for processing large winding gaskets 1.

[0023] Specifically, there are two outer top rollers 5, which form an inner pressure zone 9 and two outer pressure zones 10 on the winding gasket 1. The two outer top rollers 5 are symmetrically distributed on both sides of the inner top roller 4, so that the two outer pressure zones 10 are symmetrically distributed on both sides of the inner pressure zone 9, thereby enabling the two outer pressure zones 10 to more evenly distribute the pressure on the outside of the winding gasket 1 and reduce the internal stress of the finished winding gasket 1.

[0024] The winding mechanism or the pressing mechanism can reciprocate in a straight line, and the direction of displacement is consistent with the axis of symmetry of the two outer pressure zones 10. Thus, as the winding pad 1 gradually thickens, even if the winding mechanism or the pressing mechanism is displaced, the two inner top rollers 4 can still remain firmly attached to the outer contour of the winding pad 1.

[0025] In one embodiment, the radius of the outer top roller 5 is variable. As the winding gasket 1 thickens during molding, the radius of the outer top roller 5 can increase synchronously. (See attached...) Figure 5 As shown, the contact area between the outer top wheel 5 and the winding gasket 1 is actually an arc-shaped area. When the radius of the outer top wheel 5 increases, the area of ​​the arc-shaped area also increases, that is, the area of ​​the outer pressure zone 10 of the winding gasket 1 increases. Therefore, the pressure of the outer top wheel 5 on the winding gasket 1 will be more dispersed, and the internal stress of the finished winding gasket 1 will be reduced, making it less prone to deformation.

[0026] As attached Figure 4As shown, a thickening belt 7 is connected to the outer top roller 5. During the process of thickening the winding gasket 1, the outer top roller 5 can rotate actively, winding the thickening belt 7 onto the outer top roller 5, thus increasing the radius of the outer top roller 5 synchronously. The end of the thickening belt 7 away from the outer top roller 5 is connected to the take-up roller 8. The take-up roller 8 can also rotate actively, retracting the thickening belt 7 onto the take-up roller 8, thus decreasing the radius of the outer top roller 5.

[0027] The present invention also provides a metal-graphite spiral wound sealing gasket forming process, specifically as follows: the feeding mechanism feeds the metal strip 2 and the graphite strip 3 to the winding mechanism, the inner top wheel 4 rotates actively, driving the metal strip 2 and the graphite strip 3 to wind, thereby forming the spiral wound gasket 1; as the spiral wound gasket 1 gradually forms and thickens on the winding mechanism, the outer top wheel 5 rotates actively, winding the thickened strip 7 onto the outer top wheel 5, so that the radius of the outer top wheel 5 increases synchronously; at the same time, the winding mechanism or the pressing mechanism moves and displaces, so that the distance between the inner top wheel 4 and the outer top wheel 5 also increases adaptively to adapt to the thickness of the spiral wound gasket 1, so that the outer top wheel 5 remains pressed against the outside of the spiral wound gasket 1; After the winding gasket 1 is formed, the winding gasket 1 is removed from the winding mechanism. Then the take-up wheel 8 rotates actively to retract the thickening strip 7 onto the take-up wheel 8, so that the radius of the outer top wheel 5 is reduced and restored. Correspondingly, the winding mechanism or the pressing mechanism moves to reduce and restore the distance between the inner top wheel 4 and the outer top wheel 5, so as to process the next winding gasket 1.

[0028] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A metal-graphite spiral wound sealing gasket molding system, characterized in that: The device includes a winding mechanism and a pressing mechanism. The metal strip (2) and the graphite strip (3) can be wound on the winding mechanism to form a wound gasket (1). The winding mechanism includes an inner top wheel (4), and the pressing mechanism includes an outer top wheel (5). The inner top wheel (4) and the outer top wheel (5) are opposed to the inner and outer sides of the wound gasket (1) being formed to press the metal strip (2) and the graphite strip (3) onto the winding mechanism. The pressing mechanism has two outer top wheels (5), and each of the outer top wheels (5) is engaged with the inner top wheel (4) to disperse the outer pressure area (10) of the wound gasket (1). The outer top wheel (5) is connected to a thickening belt (7); during the process of the winding gasket (1) being formed and thickened, the outer top wheel (5) can rotate actively to wind the thickening belt (7) onto the outer top wheel (5); The winding mechanism or the pressing mechanism can move back and forth in a straight line, and the displacement direction is consistent with the axis of symmetry of the two outer pressure areas (10) so as to change the distance between the inner top wheel (4) and the outer top wheel (5) during the process of the winding pad (1) being formed and thickened. The winding mechanism includes an inner top wheel (4) and several auxiliary winding wheels (6); the inner top wheel (4) and several auxiliary winding wheels (6) are arranged in a ring, so that the outer wheel surfaces of the inner top wheel (4) and several auxiliary winding wheels (6) are combined to form a ring winding profile, and the metal strip (2) and graphite strip (3) are wound on the ring winding profile respectively. There are two outer top rollers (5), which form an inner pressure area (9) and two outer pressure areas (10) on the winding gasket (1); the two outer top rollers (5) are symmetrically distributed on both sides of the inner top roller (4), so that the two outer pressure areas (10) are symmetrically distributed on both sides of the inner pressure area (9); The end of the thickened belt (7) away from the outer top wheel (5) is connected to the winding wheel (8); the winding wheel (8) can rotate actively to retract the thickened belt (7) onto the winding wheel (8).

2. A method for forming a metal-graphite spiral wound gasket, using the metal-graphite spiral wound gasket forming system described in claim 1, characterized in that: As the wound gasket (1) gradually thickens on the winding mechanism, the outer top wheel (5) rotates actively, winding the thickened strip (7) onto the outer top wheel (5); at the same time, the winding mechanism or the pressing mechanism moves and displaces, so that the distance between the inner top wheel (4) and the outer top wheel (5) also increases adaptively. After the winding pad (1) is formed and removed from the winding mechanism, the take-up wheel (8) rotates actively to retract the thickened strip (7) onto the take-up wheel (8); correspondingly, the winding mechanism or the pressing mechanism moves.

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