A reinforced sealed metal wound gasket

Abstract

The application relates to the technical field of sealing gaskets, and discloses a metal winding gasket with reinforced sealing, which comprises a first inner ring, a metal band and a filling band arranged outside the first inner ring, and a first outer ring sleeved outside the metal band, the metal band and the filling band are alternately wound, a convex rib is arranged outside the first inner ring, convex angles are arranged in the middle portions of the metal band and the filling band, the convex rib is matched with the convex angles, a second inner ring is arranged inside the first inner ring, and a second outer ring is arranged outside the first outer ring. The sizes of the inner diameter and the outer diameter of the device are changed through the disassembly and assembly of the second inner ring and the second outer ring, so that the device is suitable for flanges with different diameters, the practicability is improved, the convex rib and the convex angles are matched, the friction between the metal band and the filling band is increased, the longitudinal supporting force between the metal band and the filling band is also increased, the metal band and the filling band are prevented from slipping off, the tightness and the stability of the sealing structure are improved, and the sealing performance of the metal winding gasket is improved.

Description

Technical Field

[0001] This invention relates to the field of sealing gasket technology, and more specifically, to a metal spiral wound gasket for enhanced sealing. Background Technology

[0002] Metal spiral wound gaskets are typically made by alternating spiral winding of high-quality stainless steel strips and flexible graphite filler material. They have excellent sealing performance and are often used to enhance the sealing effect when installed on flanges.

[0003] Gaskets can be categorized into basic, inner ring, outer ring, and inner / outer ring types based on their structure. Basic type: without inner or outer ring, suitable for tongue and groove, flat, or raised face flange sealing under medium to low pressure conditions. Inner ring type: the inner ring enhances sealing performance, suitable for medium pressure environments. Outer ring type: the outer ring provides positioning, preventing gasket displacement during installation. Inner / outer ring type: combining inner and outer rings, ideal for high pressure, high temperature, and corrosive environments. It can handle uneven loads, easily loosened joints, periodic temperature and pressure changes, and impacts or vibrations. The alternating winding of the metal strip and flexible filler material forms a multi-layer sealing structure, effectively preventing media leakage. It has a certain self-tightening function, further enhancing the sealing effect under pressure. It possesses good compression and resilience properties. The metal strip provides elastic support, while the flexible filler material absorbs pressure fluctuations, maintaining sealing stability. It maintains excellent sealing performance under high temperature, low temperature, high vacuum, and alternating load conditions. The flexible filler material can fill minor unevenness on the flange sealing surface, reducing the precision requirements of the flange sealing surface.

[0004] Currently, existing spiral wound gaskets with inner and outer rings typically consist of an inner ring, an outer ring, a metal strip, and a filler strip. The metal strip end needs to be spot-welded to the inner ring, and then the metal strip and filler strip are alternately wound to form a multi-turn sealing structure. The metal strip and filler strip are then cut, and the tail end of the metal strip is welded to the inner ring for fixation. Finally, the outer ring is fitted onto the outside of the sealing structure. However, the metal strip and filler strip are generally flat strips, and after multiple alternating turns, adjacent turns easily slip off, causing the sealing structure to loosen and deform, thus easily reducing the sealing performance of the spiral wound gasket. Therefore, this does not meet current requirements. To address this, we propose a spiral wound gasket with enhanced sealing. Summary of the Invention

[0005] This invention provides a reinforced sealing metal spiral wound gasket. This reinforced sealing metal spiral wound gasket can increase the friction between the metal strip and the filler strip, making the sealing structure less prone to slippage and loosening deformation, thus improving the tightness and integrity of the sealing structure, thereby improving the sealing performance of the metal spiral wound gasket. It solves the problem mentioned in the background art that after the flat metal strip and filler strip are alternately wound multiple times, adjacent two turns are prone to slippage, causing the sealing structure to loosen and deform, which easily reduces the sealing performance of the metal spiral wound gasket.

[0006] To achieve the above objectives, this disclosure provides a reinforced metal spiral wound gasket, comprising a first inner ring, a metal strip disposed outside the first inner ring, a filler strip disposed outside the first inner ring, and a first outer ring sleeved outside the metal strip. The metal strip and the filler strip are wound alternately. A raised rib is provided on the outer side of the first inner ring, and a raised corner is provided in the middle of both the metal strip and the filler strip. The raised rib and the raised corner are fitted together. A second inner ring is disposed inside the first inner ring, and a second outer ring is disposed outside the first outer ring. Both the second inner ring and the second outer ring are detachable. By detaching or assembling the second inner ring, the inner diameter of the device can be changed, making the device adaptable to flanges with different inner diameters. By detaching or assembling the second outer ring, the outer diameter of the device can be changed, making the device adaptable to flanges with different outer diameters. The cooperation of the raised rib and the raised corner increases the friction between the metal strip and the filler strip and also prevents the metal strip from slipping off the filler strip, thereby enhancing the sealing performance of the metal spiral wound gasket.

[0007] Optionally, the convex corner is configured such that the cross-sections of the metal strip and the filling strip are both "<" shaped, the convex ridge is configured as an annular shape, and the convex ridge is integrally formed with the first inner ring, and the outer wall of the convex ridge slides and fits against the inner wall of the convex corner.

[0008] Optionally, the outer wall of the convex corner of the metal strip is slidably fitted with the inner wall of the convex corner of the filling strip, and the outer side of the metal strip is covered with an anti-corrosion layer.

[0009] Optionally, the metal strip has a first inclined slit at its first end, with the inclined surface of the first inclined slit facing upwards. The first end of the metal strip is fixed to the outside of the first inner ring. The filler strip has a second inclined slit at its first end. After the metal strip is wrapped around the first inner ring once, the inclined surface of the second inclined slit faces downwards, so that the inclined surface of the second inclined slit fits against the outside of the first inner ring, and the first end of the filler strip fits against the inclined surface of the first inclined slit. The metal strip and the filler strip are alternately wrapped to form a sealing structure.

[0010] Optionally, after the metal strip and the filler strip are alternately wound several times, the metal strip is cut off, and a third inclined cut is provided at the tail end of the metal strip. The filler strip is also cut off, and a fourth inclined cut is provided at the tail end of the filler strip. A length is left at the tail end of the metal strip, and the tail end of the metal strip is fixed to the outside of the metal strip, so that the beginning end of the metal strip is at the innermost ring of the sealing structure, and the tail end of the metal strip is at the outermost ring of the sealing structure.

[0011] Optionally, an expansion ring is installed on the inner wall of the first outer ring, and a groove is formed on the inner wall of the expansion ring. The outer wall of the convex corner of the metal strip fits against the inner wall of the groove, so that the convex corner of the metal strip is inserted into the expansion ring.

[0012] Optionally, in the initial state, the first outer ring and the expansion ring are provided with a break, so that the first outer ring and the expansion ring are disconnected. One end of the break of the first outer ring is connected to a first buckle, and the other end of the break of the first outer ring is connected to a second buckle. Both the first buckle and the second buckle are integrally formed with the first outer ring.

[0013] Optionally, the first outer ring is sleeved on the outside of the metal strip, and the tail end of the metal strip is positioned between the first buckle and the second buckle. The first buckle and the second buckle engage with each other, so that the tail end of the metal strip is pressed and clamped between the first buckle and the second buckle. The inner side of the first outer ring is tightly fitted with the outer side of the metal strip, and the first buckle and the second buckle are welded and fixed.

[0014] Optionally, an inner ring slider is installed on the outer side of the second inner ring, and an inner ring groove is formed on the inner side of the first inner ring. The inner ring slider slides in conjunction with the inner ring groove. A first wedge block is provided on the inner side of the first inner ring, and the first wedge block is located in the inner ring groove. A first elastic rod is provided inside the first inner ring. One end of the first elastic rod is connected to the inner wall of the first inner ring, and the other end of the first elastic rod is connected to the first wedge block. The inner ring slider intermittently abuts against the first wedge block. A first protrusion is installed on the outer side of the first wedge block, and the first protrusion is slidably inserted into the side of the first inner ring.

[0015] Optionally, an outer ring slider is installed on the inner side of the second outer ring, and an outer ring groove is formed on the outer side of the first outer ring. The outer ring slider slides in conjunction with the outer ring groove. A second wedge block is provided on the inner side of the first outer ring, and the second wedge block is located in the outer ring groove. A second elastic rod is provided inside the first outer ring. One end of the second elastic rod is connected to the inner wall of the first outer ring, and the other end of the second elastic rod is connected to the second wedge block. The outer ring slider intermittently abuts against the first wedge block. A second protrusion is installed on the outer side of the second wedge block, and the second protrusion is slidably inserted into the side of the first outer ring.

[0016] Through the above technical solution, the reinforced sealing metal spiral wound gasket provided in this disclosure, when in use: by disassembling and assembling the second inner ring, the size of the inner diameter of the device can be changed, making the device adaptable to flanges with different inner diameters; by disassembling and assembling the second outer ring, the size of the outer diameter of the device can be changed, making the device adaptable to flanges with different outer diameters, thereby increasing the applicability and practicality of the device; through the cooperation of the convex ridges and convex corners, the friction between the metal strip and the filler strip is increased, and the longitudinal support force between the metal strip and the filler strip is also increased, preventing the metal strip and the filler strip from slipping off, enhancing the tightness and stability of the sealing structure, thereby strengthening the sealing performance of the metal spiral wound gasket.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the assembly structure of the first inner ring and the second inner ring of the present invention.

[0021] Figure 4 This is a schematic diagram of the first inner ring structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the second inner ring structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the second outer ring structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the first outer ring structure of the present invention.

[0025] Figure 8 This is a schematic diagram of the second wedge block structure of the present invention.

[0026] Figure 9 This is a schematic diagram of a partial transverse cross-section of the present invention.

[0027] Figure 10 This is a schematic diagram of a partial longitudinal section of the present invention.

[0028] Explanation of reference numerals in the attached drawings: 100, First inner ring; 110, Metal strip; 111, Anti-corrosion layer; 120, Filler strip; 130, First outer ring; 140, Protruding ridge; 150, Protruding corner; 160, Second inner ring; 170, Second outer ring; 180, First inclined cut; 181, Second inclined cut; 182, Third inclined cut; 183, Fourth inclined cut; 190, Expansion ring; 191, Groove; 192, First buckle; 193, Second buckle; 200, Inner ring slider; 201, Inner ring groove; 202, First wedge block; 203, First elastic rod; 204, First protrusion; 210, Outer ring slider; 211, Outer ring groove; 212, Second wedge block; 213, Second elastic rod; 214, Second protrusion. Detailed Implementation

[0029] To make the above-described objects, features, and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this disclosure. However, this disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this disclosure. Therefore, this disclosure is not limited to the specific embodiments disclosed below.

[0030] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. The terms "first" and "second" are used to distinguish one element from another and do not have sequential or importance. Furthermore, in the following description, when referring to the accompanying drawings, the same reference numerals in different drawings denote the same or similar elements, which will not be repeated here.

[0031] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0032] According to some embodiments of this disclosure, a reinforced sealing metal spiral wound gasket is provided, with reference to... Figure 1 — Figure 10 As shown, the reinforced sealing metal spiral wound gasket includes a first inner ring 100, a metal strip 110 disposed outside the first inner ring 100, a filler strip 120 disposed outside the first inner ring 100, and a first outer ring 130 sleeved outside the metal strip 110. The metal strip 110 is made of high-quality stainless steel, and the filler strip 120 is made of flexible graphite. The metal strip 110 and the filler strip 120 are wound alternately several times to form a sealing structure. A ridge 140 is provided on the outer side of the first inner ring 100. A convex corner 150 is provided in the middle of both the metal strip 110 and the filler strip 120. The ridge 140 and the convex corner 150 fit together. The convex corner 150 makes the cross-section of the metal strip 110 and the filler strip 120 both "<" shaped. The ridge 140 is made of a ring shape and is integrally formed with the first inner ring 100. The outer wall of the ridge 140 and the inner wall of the convex corner 150 are tightly and slidably fitted together.

[0033] The outer wall of the protruding corner 150 of the metal strip 110 and the inner wall of the protruding corner 150 of the filler strip 120 are closely and slidably fitted together. This not only increases the friction between the metal strip 110 and the filler strip 120 by increasing the contact area between them, but also allows the protruding corner 150 of the metal strip 110 to provide longitudinal support for the protruding corner 150 of the filler strip 120. This helps to prevent the adjacent metal strips 110 and filler strips 120 from slipping off as much as possible. The outer side of the metal strip 110 is coated with an anti-corrosion layer 111 through a spraying process, which enhances the corrosion resistance of the metal strip 110 and extends its service life.

[0034] A second inner ring 160 is provided inside the first inner ring 100, and a second outer ring 170 is provided outside the first outer ring 130. Both the second inner ring 160 and the second outer ring 170 are detachable. The first end of the metal strip 110 is provided with a first inclined cut 180, with the inclined surface of the first inclined cut 180 facing upwards. The first end of the metal strip 110 is fixed to the outside of the first inner ring 100 by spot welding. The first end of the filler strip 120 is provided with a second inclined cut 181. After the metal strip 110 is wrapped around the first inner ring 100 once, the filler strip 120 is... The metal strip 110 is inserted under the metal strip 110, with the inclined surface of the second inclined cut 181 facing downwards, so that the inclined surface of the second inclined cut 181 fits against the outer side of the first inner ring 100, and the first end of the filler strip 120 fits against the inclined surface of the first inclined cut 180. The metal strip 110 and the filler strip 120 are alternately wound to form a sealing structure. The setting of the first inclined cut 180 and the second inclined cut 181 minimizes the gap at the junction of the metal strip 110 and the filler strip 120, thereby making the sealing structure tighter and more complete.

[0035] After the metal strip 110 and the filler strip 120 are alternately wound several times, the metal strip 110 is cut off, and a third inclined cut 182 is provided at the end of the metal strip 110. The filler strip 120 is cut off, and a fourth inclined cut 183 is provided at the end of the filler strip 120. A length is left at the end of the metal strip 110. The end of the metal strip 110 is fixed to the outside of the metal strip 110 by spot welding, so that the beginning of the metal strip 110 is in the innermost ring of the sealing structure and is tightly fitted with the first inner ring 100, and the end of the metal strip 110 is in the outermost ring of the sealing structure and is tightly fitted with the first outer ring 130, thereby forming a complete and stable sealing structure.

[0036] The first inner ring 100, the first outer ring 130, the second inner ring 160, and the second outer ring 170 are all made of metal rings with a small coefficient of thermal expansion to avoid significant expansion and deformation under high temperature conditions. An expansion ring 190 is fixedly installed on the inner wall of the first outer ring 130. The expansion ring 190 is made of metal ring with a large coefficient of thermal expansion, so that the expansion ring 190 has significant volume expansion under high temperature conditions. A groove 191 is formed on the inner wall of the expansion ring 190. The outer wall of the protrusion 150 of the metal strip 110 fits against the inner wall of the groove 191, so that the protrusion 150 of the metal strip 110 is inserted into the expansion ring 190, which enhances the stability between the metal strip 110 and the expansion ring 190, thereby enhancing the stability between the metal strip 110 and the first outer ring 130.

[0037] In the initial state, the first outer ring 130 and the expansion ring 190 share a break, causing the first outer ring 130 and the expansion ring 190 to disconnect. One end of the break of the first outer ring 130 is connected to the first buckle 192, and the other end of the break of the first outer ring 130 is connected to the second buckle 193. The first buckle 192 and the second buckle 193 are both integrally formed with the first outer ring 130. First, the first outer ring 130 is fitted onto the outside of the outermost metal strip 110. The tail end of the metal strip 110 is positioned between the first buckle 192 and the second buckle 193. Then, the first buckle 192 and the second buckle 193 are engaged with each other, so that the tail end of the metal strip 110 is pressed and clamped between the first buckle 192 and the second buckle 193, so that the inner side of the first outer ring 130 is tightly fitted with the outer side of the metal strip 110. Finally, the gap between the first buckle 192 and the second buckle 193 is fixed by welding.

[0038] An inner ring slider 200 is fixedly installed on the outer side of the second inner ring 160. An inner ring groove 201 is formed on the inner side of the first inner ring 100. The inner ring slider 200 slides in conjunction with the inner ring groove 201. A first wedge block 202 is provided on the inner side of the first inner ring 100. The first wedge block 202 is located in the inner ring groove 201. A first elastic rod 203 is provided inside the first inner ring 100. One end of the first elastic rod 203 is fixedly connected to the inner wall of the first inner ring 100, and the other end of the first elastic rod 203 is fixedly connected to the first wedge block 202. The inner ring slider 200 intermittently abuts against the first wedge block 202. When the second inner ring 160 is installed... When fitted inside the first inner ring 100, the inner ring slider 200 abuts against the first wedge block 202, engaging the inner ring slider 200 within the inner ring groove 201, thereby fixing the second inner ring 160 inside the first inner ring 100. A first protrusion 204 is fixedly installed on the outer side of the first wedge block 202, and the first protrusion 204 is slidably inserted into the side of the first inner ring 100. This facilitates moving the first wedge block 202 away from the inner ring slider 200 by moving the first protrusion 204, thereby releasing the abutment between the inner ring slider 200 and the first wedge block 202, and thus making it easy to remove the second inner ring 160 from the inside of the first inner ring 100.

[0039] Similarly, an outer ring slider 210 is fixedly installed on the inner side of the second outer ring 170, and an outer ring groove 211 is opened on the outer side of the first outer ring 130. The outer ring slider 210 slides in conjunction with the outer ring groove 211. A second wedge block 212 is provided on the inner side of the first outer ring 130. The second wedge block 212 is located in the outer ring groove 211. A second elastic rod 213 is provided inside the first outer ring 130. One end of the second elastic rod 213 is fixedly connected to the inner wall of the first outer ring 130, and the other end of the second elastic rod 213 is fixedly connected to the second wedge block 212. The outer ring slider 210 intermittently abuts against the first wedge block 202. When the second outer ring 170... When assembled on the outside of the first outer ring 130, the outer ring slider 210 abuts against the second wedge block 212, locking the outer ring slider 210 into the outer ring groove 211, thereby fixing the second outer ring 170 on the outside of the first outer ring 130. A second protrusion 214 is fixedly installed on the outside of the second wedge block 212. The second protrusion 214 is slidably inserted into the side of the first outer ring 130, so that by moving the second protrusion 214, the second wedge block 212 can be moved away from the outer ring slider 210, releasing the abutment between the outer ring slider 210 and the second wedge block 212, thereby facilitating the removal of the second outer ring 170 from the outside of the first outer ring 130.

[0040] By assembling and disassembling the second inner ring 160, the inner diameter of the device can be changed, making it compatible with flanges of different inner diameters. Similarly, by assembling and disassembling the second outer ring 170, the outer diameter of the device can be changed, making it compatible with flanges of different outer diameters. This increases the applicability and practicality of the device. The cooperation between the convex rib 140 and the convex angle 150 increases the friction between the metal strip 110 and the filler strip 120, as well as the longitudinal support force between them. This prevents the metal strip 110 and the filler strip 120 from slipping off, enhancing the tightness and stability of the sealing structure and thus strengthening the sealing performance of the metal spiral wound gasket.

[0041] Through the above technical solution, the reinforced sealing metal spiral wound gasket provided in this disclosure, when in use, has a first inclined cut 180 at the leading end of the metal strip 110, which is fixed to the outer wall of the first inner ring 100 by spot welding. The leading end of the filler strip 120 has a second inclined cut 181. After the metal strip 110 is wound around the first inner ring 100 once, the filler strip 120 is inserted under the metal strip 110, so that the inclined surface of the second inclined cut 181 fits against the outer wall of the first inner ring 100, and the leading end of the filler strip 120 fits against the inclined surface of the first inclined cut 180, complementing the first inclined cut 180 and minimizing the impact of metal spiral wound gasket defects. The gap between the end of the metal strip 110 and the end of the filler strip 120 is then filled by alternately winding the metal strip 110 and the filler strip 120 to form a sealing structure. After winding, the tail end of the metal strip 110 is cut to form a third inclined cut 182, and the tail end of the filler strip 120 is cut to form a fourth inclined cut 183. The tail end extension of the metal strip 110 is reserved. The tail end is fixed to the outer side of the outermost metal strip 110 by spot welding, so that the innermost metal strip 110 of the sealing structure is tightly fitted with the outer side of the first inner ring 100, and the outermost metal strip 110 of the sealing structure is tightly fitted with the inner side of the first outer ring 130. Furthermore, the outer ridge 140 of the first inner ring 100 is inserted into the convex corner 150 of the metal strip 110, so that the outer wall of the ridge 140 is tightly slidably attached to the inner wall of the convex corner 150 of the metal strip 110. At the same time, the outer wall of the convex corner 150 of the metal strip 110 is tightly slidably attached to the inner wall of the convex corner 150 of the filling strip 120, increasing the friction and longitudinal support between the metal strip 110 and the filling strip 120. The reserved tail end of the metal strip 110 is placed between the first buckle 192 and the second buckle 193, engaging the first buckle 192 and the second buckle 193, thereby clamping the tail end of the metal strip 110. Then, the first buckle 192 and the second buckle 193 are welded and fixed to fix the first outer ring 130, so that the inner side wall of the first outer ring 130 is tightly attached to the outer side wall of the sealing body, making the sealing structure more stable. When assembling the second inner ring 160, the inner ring slider 200 slides into the inner ring groove 201 and abuts against the first wedge block 202, pushing the first wedge block 202 and compressing the first elastic rod 203. When the inner ring slider 200 passes the first wedge block 202, the rebound force of the first elastic rod 203 drives the first wedge block 202 to reset, locking the inner ring slider 200 between the inner ring groove 201 and the first wedge block 202, thereby fixing the second inner ring 160. When disassembling the second inner ring 160, a tool is used to move the first protrusion 204, which moves the first wedge block 202 away from the inner ring slider 200, releasing the locking and limiting effect of the first wedge block 202 on the inner ring slider 200, thus completing the disassembly of the second inner ring 160. By disassembling and assembling the second inner ring 160, the inner diameter of the device can be changed, making the device adaptable to flanges with different inner diameters. Similarly, by using the above method to complete the disassembly and assembly of the second outer ring 170, the device can be adapted to flanges of different outer diameters, thereby enhancing the applicability and practicality of the device. In addition, under high temperature conditions, the volume of the expansion ring 190 expands significantly. Due to the restriction of the outer side of the expansion ring 190 by the first outer ring 130, the expansion ring 190 expands inward, squeezing the sealing structure composed of the alternating winding of the metal strip 110 and the filler strip 120 inward. This further enhances the friction and tightness between the metal strip 110 and the filler strip 120, and also further compresses the filler strip 120 laterally, intensifying the longitudinal deformation of the filler strip 120. This makes the filler strip 120 fit more tightly with the flange surface, enhancing the sealing effect. Furthermore, through the interlocking of the convex rib 140 and the convex angle 150, and the clamping and fixing structure of the first outer ring 130 on the tail end of the metal strip 110, slippage between the metal strip 110 and the filler strip 120, as well as between the sealing structure and the first inner ring 100 and the first outer ring 130, can be effectively prevented. This improves the overall structural strength and deformation resistance of the gasket, thereby enhancing the sealing performance of the metal spiral wound gasket.

[0042] It should be noted that by obliquely cutting the metal strip 110, a third oblique cut 182 is formed at the tail end of the metal strip 110, and a first oblique cut 180 is formed at the other end of the metal strip 110. This end can then serve as the beginning end of the metal strip 110 in the next sealing structure. Similarly, by obliquely cutting the filler strip 120, a fourth oblique cut 183 is formed at the tail end of the filler strip 120, and a second oblique cut 181 is formed at the other end of the filler strip 120. This end can then serve as the beginning end of the filler strip 120 in the next sealing structure.

[0043] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0045] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A reinforced sealing metal spiral wound gasket, comprising a first inner ring (100), a metal strip (110) disposed outside the first inner ring (100), a filler strip (120) disposed outside the first inner ring (100), and a first outer ring (130) sleeved outside the metal strip (110), wherein the metal strip (110) and the filler strip (120) are alternately wound, characterized in that: The first inner ring (100) has a raised ridge (140) on its outer side, and the metal strip (110) and the filling strip (120) both have raised corners (150) in the middle. The raised ridge (140) and the raised corners (150) fit together. A second inner ring (160) is provided on the inner side of the first inner ring (100), and a second outer ring (170) is provided on the outer side of the first outer ring (130). Both the second inner ring (160) and the second outer ring (170) are detachable. The device can be disassembled and assembled to change the size of its inner diameter, making it compatible with flanges of different inner diameters. The outer diameter of the device can be changed by disassembling and assembling the second outer ring (170), making it compatible with flanges of different outer diameters. The friction between the metal strip (110) and the filler strip (120) is increased by the cooperation of the convex rib (140) and the convex angle (150), and the slippage of the metal strip (110) and the filler strip (120) is also prevented, thereby enhancing the sealing performance of the metal spiral wound gasket.

2. The metal spiral wound gasket with enhanced sealing according to claim 1, characterized in that: The convex angle (150) is set such that the cross-section of the metal strip (110) and the filling strip (120) are both "<" shaped. The convex ridge (140) is set in a ring shape and is integrally formed with the first inner ring (100). The outer wall of the convex ridge (140) slides and fits against the inner wall of the convex angle (150).

3. The metal spiral wound gasket with enhanced sealing according to claim 2, characterized in that: The outer wall of the convex corner (150) of the metal strip (110) slides and fits against the inner wall of the convex corner (150) of the filling strip (120), and the outer side of the metal strip (110) is covered with an anti-corrosion layer (111).

4. The metal spiral wound gasket with enhanced sealing according to claim 1, characterized in that: The metal strip (110) has a first inclined cut (180) at its first end, with the inclined surface of the first inclined cut (180) facing upwards. The first end of the metal strip (110) is fixed to the outside of the first inner ring (100). The filler strip (120) has a second inclined cut (181) at its first end. After the metal strip (110) wraps around the first inner ring (100) once, the inclined surface of the second inclined cut (181) faces downwards, so that the inclined surface of the second inclined cut (181) fits against the outside of the first inner ring (100), and the first end of the filler strip (120) fits against the inclined surface of the first inclined cut (180). The metal strip (110) and the filler strip (120) are alternately wrapped to form a sealing structure.

5. A reinforced sealing metal spiral wound gasket according to claim 4, characterized in that: After the metal strip (110) and the filler strip (120) are alternately wound around several times, the metal strip (110) is cut off, and a third inclined cut (182) is provided at the tail end of the metal strip (110). The filler strip (120) is cut off, and a fourth inclined cut (183) is provided at the tail end of the filler strip (120). A length is reserved at the tail end of the metal strip (110). The tail end of the metal strip (110) is fixed to the outside of the metal strip (110), so that the beginning end of the metal strip (110) is in the innermost circle of the sealing structure, and the tail end of the metal strip (110) is in the outermost circle of the sealing structure.

6. The metal spiral wound gasket with enhanced sealing according to claim 5, characterized in that: An expansion ring (190) is installed on the inner wall of the first outer ring (130). The inner wall of the expansion ring (190) has a groove (191). The outer wall of the convex corner (150) of the metal strip (110) fits against the inner wall of the groove (191), so that the convex corner (150) of the metal strip (110) is inserted into the expansion ring (190).

7. A reinforced sealing metal spiral wound gasket according to claim 6, characterized in that: In the initial state, the first outer ring (130) and the expansion ring (190) are provided with a break, so that the first outer ring (130) and the expansion ring (190) are disconnected. One end of the break of the first outer ring (130) is connected to a first buckle (192), and the other end of the break of the first outer ring (130) is connected to a second buckle (193). The first buckle (192) and the second buckle (193) are both integrated with the first outer ring (130).

8. A reinforced sealing metal spiral wound gasket according to claim 7, characterized in that: The first outer ring (130) is sleeved on the outside of the metal strip (110). The tail end of the metal strip (110) is set between the first buckle (192) and the second buckle (193). The first buckle (192) and the second buckle (193) engage with each other, so that the tail end of the metal strip (110) is pressed and clamped between the first buckle (192) and the second buckle (193). The inner side of the first outer ring (130) is tightly fitted with the outer side of the metal strip (110). The first buckle (192) and the second buckle (193) are welded and fixed.

9. A reinforced sealing metal spiral wound gasket according to claim 1, characterized in that: An inner ring slider (200) is installed on the outer side of the second inner ring (160). An inner ring groove (201) is opened on the inner side of the first inner ring (100). The inner ring slider (200) slides in cooperation with the inner ring groove (201). A first wedge block (202) is provided on the inner side of the first inner ring (100). The first wedge block (202) is located in the inner ring groove (201). A first elastic rod (203) is provided in the first inner ring (100). One end of the first elastic rod (203) is connected to the inner wall of the first inner ring (100). The other end of the first elastic rod (203) is connected to the first wedge block (202). The inner ring slider (200) and the first wedge block (202) intermittently abut against each other. A first protrusion (204) is installed on the outer side of the first wedge block (202). The first protrusion (204) is slidably inserted into the side of the first inner ring (100).

10. A reinforced sealing metal spiral wound gasket according to claim 1, characterized in that: An outer ring slider (210) is installed on the inner side of the second outer ring (170). An outer ring groove (211) is opened on the outer side of the first outer ring (130). The outer ring slider (210) slides in cooperation with the outer ring groove (211). A second wedge block (212) is provided on the inner side of the first outer ring (130). The second wedge block (212) is located in the outer ring groove (211). A second elastic rod (213) is provided in the first outer ring (130). One end of the second elastic rod (213) is connected to the inner wall of the first outer ring (130). The other end of the second elastic rod (213) is connected to the second wedge block (212). The outer ring slider (210) intermittently abuts against the first wedge block (202). A second protrusion (214) is installed on the outer side of the second wedge block (212). The second protrusion (214) is slidably inserted into the side of the first outer ring (130).

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