Thermal resistance gasket

Abstract

The thermal resistance gasket comprises a metal anti-corrosion skin, a metal core plate is arranged in the metal anti-corrosion skin, and the space between the metal core plate and the metal anti-corrosion skin is filled with graphite solution soaking glass fibers. Compared with the prior art, the thermal resistance gasket has the advantage of excellent performance. A thermal resistance barrier is formed by the special structure and material characteristics of the graphite-immersed solution glass fiber, such as in a heat exchanger, the thermal efficiency can be improved by 10-15%, and the heat loss is reduced. And the metal anti-corrosion skin and the external coating layer provide multi-layer corrosion prevention, so that the service life is prolonged, and the leakage risk is reduced. U-shaped structural components cooperate, reliable sealing is achieved, the graphite solution soaked glass fibers have the lubricity, installation is convenient, and abrasion is reduced. The metal core plate ensures structural stability, adapts to high-temperature, high-pressure and corrosive working conditions, is high in universality and is widely applied to sealing of various industrial devices.

Description

Technical Field

[0001] The invention relates to the field of industrial sealing materials, and in particular to a thermal resistance gasket with good thermal resistance and sealing properties for use in high temperature and corrosive environments. Background Art

[0002] In industrial production, many equipment need to operate in harsh environments with high temperature, high pressure and corrosive media, such as pipeline connections, valve seals, heat exchanger seals and other parts in the chemical, petroleum, and electric power industries. Gaskets are indispensable sealing components in these equipment, and their performance directly affects the operating safety, stability and energy efficiency of the equipment. Traditional gasket materials, such as rubber and asbestos, are prone to aging and deformation in high temperature environments, resulting in reduced sealing performance, which in turn causes medium leakage, which not only causes energy waste, but may also cause serious safety accidents and environmental pollution. At the same time, under the action of corrosive media, the chemical stability of traditional gasket materials is poor and they are easily corroded and damaged, further reducing their service life and sealing reliability. In addition, with the continuous development of industrial technology, higher requirements are put forward for energy saving and efficient operation of equipment. The shortcomings of traditional gaskets in thermal resistance performance are gradually highlighted, and they cannot meet the needs of modern industry for heat insulation and heat preservation. Therefore, it is of great practical significance to develop a new type of gasket that can adapt to high temperature and corrosive environments and has excellent thermal resistance and reliable sealing performance. Summary of the invention

[0003] The present invention aims to provide a thermal resistance gasket that overcomes the problems of poor sealing performance, easy aging and deformation, insufficient thermal resistance and poor corrosion resistance of traditional gaskets in high temperature and corrosive environments, and achieves long-term stable operation of the gasket under harsh working conditions, ensures the sealing reliability of the equipment, improves energy utilization efficiency, and extends the maintenance cycle of the equipment.

[0004] To solve the above technical problems, the technical solution provided by the present invention is: a thermal resistance gasket, comprising a metal anti-corrosion skin, a metal core plate is arranged inside the metal anti-corrosion skin, and glass fiber impregnated with graphite solution is filled between the metal core plate and the metal anti-corrosion skin.

[0005] As an improvement, the metal anti-corrosion skin is U-shaped, the ends are sealed and wrapped, and a metal anti-corrosion belt coating layer is provided on the outside of the metal anti-corrosion skin.

[0006] As an improvement, the thickness of the metal core board and the glass fiber impregnated with graphite solution is 3mm.

[0007] As an improvement, the glass fiber impregnated with graphite solution is U-shaped, with the direction opposite to that of the metal anti-corrosion skin.

[0008] The advantages of the present invention compared with the prior art are: excellent thermal resistance performance

[0009] The special structure and material properties of the glass fiber 3 impregnated with graphite solution make it an excellent thermal resistance medium. The low thermal conductivity of the graphite solution and the heat insulation of the glass fiber, in cooperation with the metal core plate 2 and the metal anticorrosive skin 1, form an effective thermal resistance barrier. In high temperature environments, such as the sealing parts of industrial furnaces, heat exchangers and other equipment, this thermal resistance gasket can significantly reduce heat conduction, reduce energy consumption, and improve the thermal efficiency of the equipment. For example, using this thermal resistance gasket in a heat exchanger can increase the heat exchange efficiency by 10%-15%, effectively reduce heat loss, and reduce operating costs.

[0010] Excellent anti-corrosion performance

[0011] The metal anti-corrosion skin 1 and its external metal anti-corrosion belt coating provide multi-level anti-corrosion protection for the gasket. The metal anti-corrosion skin 1 itself is made of corrosion-resistant metal material, which can resist a certain degree of corrosion from corrosive media, and the metal anti-corrosion belt coating further enhances the overall corrosion resistance. In chemical production, when the gasket is exposed to corrosive media such as strong acids and alkalis, this composite anti-corrosion structure can ensure that the gasket maintains stable performance for a long time, extend the service life of the gasket, reduce the risk of leakage of equipment due to gasket corrosion, and improve the safety and reliability of equipment operation.

[0012] Reliable sealing performance

[0013] The synergistic effect of the U-shaped metal anticorrosion skin 1, the metal core plate 2 and the graphite solution-impregnated glass fiber 3 enables the gasket to undergo moderate elastic deformation when subjected to pressure, closely fit the sealing surface, and fill the tiny gaps between the sealing surfaces, thereby achieving a reliable sealing effect. Whether in application scenarios such as high-pressure pipeline connection or high-temperature valve sealing, this thermal resistance gasket can effectively prevent medium leakage and ensure the safe and stable operation of the equipment system. At the same time, the lubricity of the graphite solution-impregnated glass fiber 3 reduces the friction coefficient of the gasket during installation and use, facilitates installation operations, and reduces wear on the sealing surface, further improving the reliability and durability of the seal.

[0014] Good structural stability and adaptability

[0015] The presence of the metal core plate 2 provides a stable structural support for the gasket, ensuring the shape stability of the gasket under different working conditions. Whether it is thermal expansion and contraction at high temperature or under pressure changes, the gasket can maintain its structural integrity and is not prone to deformation, cracking and other problems. This good structural stability enables the thermal resistance gasket to adapt to complex and changeable industrial environments, and is widely used in equipment sealing under various high temperature, high pressure and corrosive working conditions, with strong versatility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of a thermal resistance gasket.

[0017] Figure 2 The present invention is a schematic structural diagram of a first embodiment of a thermal resistance gasket.

[0018] Figure 3 The present invention is a schematic structural diagram of a second embodiment of a thermal resistance gasket.

[0019] As shown in the figure: 1. Metal anti-corrosion skin, 2. Metal core board, 3. Glass fiber impregnated with graphite solution. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] When the present invention is implemented, the overall structure

[0022] The thermal resistance gasket includes a metal anticorrosion skin 1, a metal core plate 2 and a glass fiber impregnated with a graphite solution 3. A metal core plate 2 is arranged inside the metal anticorrosion skin 1, and the glass fiber impregnated with a graphite solution 3 is filled between the two. The metal anticorrosion skin 1 is U-shaped, and its ends are sealed and wrapped by welding, riveting or special sealant sealing, which effectively prevents leakage of the internal filling material, and a metal anticorrosion belt coating layer is coated on the outside of the metal anticorrosion skin 1. The metal anticorrosion belt coating layer can be made of metal materials with excellent corrosion resistance, such as titanium alloy belts, nickel-based alloy belts, etc., and is tightly attached to the surface of the metal anticorrosion skin 1 through winding, coating and other processes to form a reliable external protective barrier.

[0023] Key Component Features

[0024] The thickness of the metal core plate 2 and the glass fiber 3 impregnated with graphite solution is 3 mm. The metal core plate 2 is made of metal materials with high strength, good thermal conductivity and corrosion resistance, such as stainless steel, Hastelloy, etc. Its function is to provide sufficient structural strength support for the gasket to ensure that the gasket will not be excessively deformed or damaged when under pressure, and at the same time, it can evenly transfer heat to avoid local overheating. The glass fiber 3 impregnated with graphite solution is U-shaped, and its direction is opposite to the metal anti-corrosion skin 1. This structural design enables the glass fiber 3 impregnated with graphite solution to better fill the small gaps between the metal anti-corrosion skin 1 and the metal core plate 2 and between the sealing surfaces when the gasket is under pressure, thereby improving the sealing performance. The graphite solution in the glass fiber 3 impregnated with graphite solution has excellent lubricity, thermal resistance and chemical stability, and the glass fiber provides good flexibility and strength. The combination of the two can effectively prevent heat transfer, reduce the friction coefficient between the gasket and the sealing surface, and improve the corrosion resistance and sealing reliability of the gasket.

[0025] Working principle of the invention: heat conduction barrier

[0026] The glass fiber 3 soaked in graphite solution is the main heat-insulating component in the thermal resistance gasket. The graphite solution has a low thermal conductivity and can effectively prevent the rapid transfer of heat. When heat is transferred from the high-temperature side to the thermal resistance gasket, the graphite particles in the graphite solution will scatter and absorb heat, slowing down the conduction speed of heat inside the material.

[0027] The glass fiber plays a supporting and reinforcing role in the graphite solution-impregnated glass fiber 3, and at the same time, due to its relatively low thermal conductivity, it further hinders the conduction of heat. The mesh structure formed by the glass fiber limits the diffusion path of heat in the gasket by conduction, making it difficult for heat to be quickly transferred to the low-temperature side through the gasket.

[0028] Although the metal core board 2 has a certain thermal conductivity, its thickness and material selection have been optimized. On the one hand, it can disperse heat evenly to a certain extent to avoid local overheating; on the other hand, its relatively high heat capacity can absorb and store part of the heat, delaying the transfer of heat to the low-temperature side. When heat is transferred to the metal core board 2, the metal core board 2 will diffuse the heat inside it instead of directly conducting it to the low-temperature side, thereby cooperating with the graphite solution-impregnated glass fiber 3 to reduce the overall thermal conductivity efficiency of the thermal resistance gasket.

[0029] Sealing mechanism

[0030] When the thermal resistance gasket is subjected to pressure from the connecting parts, the U-shaped metal anticorrosion skin 1 will undergo elastic deformation. This deformation enables the metal anticorrosion skin 1 to fit tightly between the sealing surfaces, filling the tiny unevenness and gaps of the sealing surfaces, thereby forming a preliminary seal.

[0031] The metal core plate 2 provides a stable support structure for the gasket under pressure, ensuring that the metal anticorrosive skin 1 will not be excessively dented or cracked during deformation, thereby maintaining the stability of its sealing performance. At the same time, the presence of the metal core plate 2 also enables the gasket to maintain a relatively uniform sealing pressure distribution under different pressure conditions.

[0032] The graphite solution-impregnated glass fiber 3 is U-shaped and in the opposite direction to the metal anticorrosion skin 1. Under pressure, it will be squeezed and filled in the remaining tiny gaps between the metal anticorrosion skin 1 and the metal core plate 2 and between the sealing surfaces. The graphite solution in the graphite solution-impregnated glass fiber 3 has lubricity, which enables it to better adapt to the irregularities of the sealing surface when filling the gap, further improving the sealing effect, while also reducing the friction coefficient between the sealing surfaces and reducing the wear on the sealing surfaces during installation and use.

[0033] Corrosion protection

[0034] The metal anticorrosive skin 1 is made of corrosion-resistant metal material, which can resist the erosion of external corrosive media to a certain extent. Its U-shaped structure and sealed wrapping design prevent the corrosive media from directly contacting the internal metal core plate 2 and the graphite solution-impregnated glass fiber 3, playing the role of the first line of defense.

[0035] The metal anti-corrosion belt coating is tightly coated on the outside of the metal anti-corrosion skin 1, further enhancing the barrier ability to corrosive media. The metal anti-corrosion belt can be made of materials with excellent corrosion resistance, such as titanium alloy belts, nickel-based alloy belts, etc. They can form a stable passivation film or corrosion-resistant layer in a harsh corrosive environment, effectively preventing corrosive media from penetrating into the gasket, protecting the metal anti-corrosion skin 1 and internal components from corrosion, and ensuring the structural integrity and performance stability of the thermal resistance gasket during long-term use.

[0036] In actual applications, thermal resistance gaskets are installed in pipe connections, flange seals and other locations. Through the above working principles, they can achieve effective insulation, sealing and anti-corrosion functions in high temperature and corrosive environments, ensuring the safe and stable operation of equipment, improving energy utilization efficiency, and extending the service life and maintenance cycle of equipment.

[0037] Gasket preparation

[0038] First, according to the design requirements, a suitable metal material is selected, and a precision machining process is used to make a metal core plate 2 to ensure that its thickness is precisely 3 mm. Then, the metal core plate 2 is placed in a customized mold, and the pre-prepared graphite solution-impregnated glass fiber 3 is filled around the metal core plate 2. The preparation process of the graphite solution-impregnated glass fiber 3 is as follows: Select a suitable glass fiber material, soak it in a solution containing high-purity graphite powder, dispersant and binder, stir it thoroughly to make the graphite powder evenly adhere to the surface of the glass fiber, and then dry it to solidify the graphite solution on the glass fiber to form a graphite solution-impregnated glass fiber 3, and ensure that its thickness is 3 mm and U-shaped, and the direction is opposite to the metal anti-corrosion skin 1. Next, the U-shaped metal anti-corrosion skin 1 is covered on the metal core plate 2 filled with graphite solution-impregnated glass fiber 3, and the ends of the metal anti-corrosion skin 1 are sealed and wrapped by welding or using high-strength sealants to ensure that the internal filling material does not leak. Finally, a suitable metal anti-corrosion belt, such as a titanium alloy belt, is selected and tightly attached to the outside of the metal anti-corrosion skin 1 by a winding or coating process to form a metal anti-corrosion belt coating layer.

[0039] Gasket performance test Thermal resistance performance

[0040] A special thermal resistance performance test device was built, and the prepared thermal resistance gasket was installed in the heat conduction channel of the test device. A stable high-temperature heat source was set on one side of the heat conduction channel, and a high-precision temperature sensor was installed on the other side. During the test, the temperature of the high-temperature heat source was kept constant, and the temperature changes on the other side were monitored in real time through the temperature sensor. After a long test, such as 24 hours, the thermal resistance coefficient of the thermal resistance gasket was calculated based on the temperature change data. The experimental results show that the thermal resistance coefficient of this thermal resistance gasket is significantly better than that of traditional gasket materials, and can effectively prevent heat transfer in high temperature environments. For example, when the heat source temperature is 300°C, the temperature on the other side of the test device using this thermal resistance gasket only rose by 50°C in 24 hours, while the temperature on the other side of the test device using traditional rubber gaskets rose by 150°C.

[0041] Gasket performance test Anti-corrosion performance

[0042] Prepare solutions simulating different corrosive media, such as sulfuric acid solutions, hydrochloric acid solutions, sodium hydroxide solutions, etc. of different concentrations. Soak the thermal resistance gaskets in these solutions respectively, and regularly observe the appearance changes of the gaskets during the soaking process, such as whether there are corrosion spots, deformation, material shedding, etc., and detect the sealing performance and physical property changes of the gaskets. After long-term immersion tests such as immersion for 1000 hours, it was found that the thermal resistance gasket showed good corrosion resistance in various corrosive solutions, the metal anti-corrosion skin 1 and the metal anti-corrosion belt coating had no obvious signs of corrosion, the structure of the glass fiber 3 immersed in the graphite solution was intact, and the sealing performance of the gasket remained basically unchanged. However, after being immersed for a shorter time such as 200 hours under the same conditions, the traditional gaskets showed serious corrosion and sealing performance failure.

[0043] Application of gaskets in actual equipment

[0044] The thermal resistance gasket is installed at the connection part of the high-temperature and high-pressure pipeline in chemical production. After the equipment runs for a production cycle such as 3 months, the sealing condition of the pipeline and the performance of the gasket are checked. The actual application results show that under the conditions of high temperature such as 250°C, high pressure such as 10MPa and the presence of corrosive media such as sulfuric acid vapor, the thermal resistance gasket can operate stably, effectively prevent medium leakage, and ensure the safe and reliable operation of the pipeline system. At the same time, due to its good thermal resistance performance, it reduces the heat loss of the medium in the pipeline to the surrounding environment, improves energy utilization efficiency, and reduces production costs. The use of this thermal resistance gasket in the sealing part of the heat exchanger in petroleum refining has also achieved good results. The heat exchange efficiency has been significantly improved, the equipment maintenance cycle has been extended, and the equipment maintenance cost and safety risks caused by leakage have been reduced. The thermal resistance gasket of the present invention provides an efficient and reliable solution for the sealing and insulation of industrial equipment in high temperature and corrosive environments through the careful design and coordinated work of various components.

[0045] Embodiment 1:

[0046] A thermal resistance gasket comprises a metal anti-corrosion skin (1), characterized in that a metal core plate (2) is arranged inside the metal anti-corrosion skin (1), and glass fiber (3) impregnated with graphite solution is filled between the metal core plate (2) and the metal anti-corrosion skin (1).

[0047] As an improvement, the metal anti-corrosion skin (1) is U-shaped, with the ends sealed and wrapped, and a metal anti-corrosion belt coating layer is provided on the outside of the metal anti-corrosion skin (1).

[0048] As an improvement, the thickness of the metal core plate (2) and the glass fiber impregnated with graphite solution (3) is 3 mm.

[0049] Embodiment 2:

[0050] A thermal resistance gasket comprises a metal anti-corrosion skin (1), characterized in that a metal core plate (2) is arranged inside the metal anti-corrosion skin (1), and glass fiber (3) impregnated with graphite solution is filled between the metal core plate (2) and the metal anti-corrosion skin (1).

[0051] As an improvement, the metal anti-corrosion skin (1) is U-shaped, with the ends sealed and wrapped, and a metal anti-corrosion belt coating layer is provided on the outside of the metal anti-corrosion skin (1).

[0052] As an improvement, the thickness of the metal core plate (2) is 3 mm.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A thermal resistance gasket, comprising a metal anticorrosive skin (1), characterized in that: A metal core plate (2) is arranged inside the metal anti-corrosion skin (1), and glass fibers (3) impregnated with graphite solution are filled between the metal core plate (2) and the metal anti-corrosion skin (1).

2. A thermal resistance gasket according to claim 1, characterized in that: The metal anti-corrosion skin (1) is U-shaped, with the ends sealed and wrapped, and a metal anti-corrosion belt coating layer is provided outside the metal anti-corrosion skin (1).

3. The thermal resistance gasket according to claim 1, characterized in that: The thickness of the metal core plate (2) and the glass fiber impregnated with graphite solution (3) is 3 mm.

4. The thermal resistance gasket according to claim 1, characterized in that: The glass fiber (3) impregnated with graphite solution is U-shaped and has a direction opposite to that of the metal anticorrosive skin (1).

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