Metal coated gasket
By designing a metal-covered gasket including filler parts, expansion parts, pressing plates, ring parts and drawings, the problem of degradation of sealing under high temperature and high pressure environments is solved, and the excellent sealing effect under double sealing structure and high temperature conditions is achieved.
Patent Information
- Application Number
- CN202411934888.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-03-28
AI Technical Summary
In high temperature and high pressure environments, the internal elasticity of the existing metal-clad gaskets weakens and leaks at the external welding position, resulting in a decrease in sealing.
A metal-covered gasket is designed, including a filler member, an expansion member, a pressing plate, a ring member and a wire drawing. The pressure plate applies a pressing force to deform the filler member to promote the expansion of the expansion member. The wire drawing limits the expansion direction of the expansion member, forming a double seal structure.
The sealing effect of metal-covered gaskets is improved, adapts to the sealing requirements of different sealing positions, and improves the sealing performance by gas expansion in the cavity under high temperature conditions.
Smart Images
Figure CN119712843A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of gaskets, and in particular to a metal-clad gasket. Background Art
[0002] Metal-clad gaskets are composite gaskets composed of non-metallic materials inside and metal materials outside for wrapping the inside. Since the inner part is made of elastic material, the metal-clad gasket has good resilience. At the same time, the outer part used for wrapping is made of metal material, which makes the metal-clad gasket have a certain strength. This makes the metal-clad gasket suitable for sealing components in high-pressure and high-temperature environments such as heat exchangers.
[0003] The metal-clad gasket is installed at the sealing position of the heat exchanger, which makes the metal-clad gasket be in a high-pressure and high-temperature environment for a long time. Over time, the high temperature will cause the elasticity of the internal material to gradually weaken, and the high pressure will cause leakage at the external wrapping welding position, resulting in a decrease in the sealing performance of the metal-clad gasket.
[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention
[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a metal sheathed gasket to solve the problem in the prior art that high temperature will cause the elasticity of the internal material to gradually weaken, and high pressure will cause leakage at the external wrapping welding position, thereby causing the sealing of the metal sheathed gasket to decrease.
[0006] To achieve the above object, the technical solution of the present invention is as follows:
[0007] A metal-clad gasket;
[0008] It includes: a packing piece; an expansion piece, wrapping the packing piece; a pressure plate, clamping the expansion piece up and down; a ring piece, surrounding both sides of the packing piece and connected inside the expansion piece; a wire drawing, passing through the packing piece and winding around the ring piece;
[0009] The pressure plate is pressed against the expansion member and the filler member, and the filler member is deformed under force to push the expansion member to expand outward; the wire drawing tightens the ring members on both sides to restrict the expansion member, so that the expansion of the expansion member is formed on both sides of the ring members.
[0010] A further technical solution is that the expansion member forms an opening near the pressure plate; the pressure plate forms a guide strip near the expansion member, and the guide strip extends along the deformation direction of the filler member; the guide strip passes through the opening and is embedded in the filler member.
[0011] A further technical solution is that the pressure plate forms an expansion surface near the expansion member, and the expansion surface is formed along the expansion direction of the expansion member; the expansion member is bent outward near the expansion surface, and the bending position of the expansion member is sequentially overlapped along the expansion direction of the expansion member.
[0012] A further technical solution is that the shape of the expansion surface is related to the expansion degree of the expansion piece; the bending length of the expansion piece is positively correlated to the expansion range of the expansion piece; the number of overlapping times of the expansion piece is positively correlated to the expansion depth of the expansion piece.
[0013] A further technical solution is that cavities are formed on both sides of the filler piece; the cavity has a height X along the direction of the adjacent pressure plate; the cavity has a length Y along the deformation direction of the filler piece; the ratio of height X: length Y is positively correlated with the expansion range of the expansion piece; the ratio of height X: length Y is negatively correlated with the expansion depth of the expansion piece.
[0014] A further technical solution is that the cavity includes an expansion space and a pressure space; the pressure space gradually expands along the deformation direction of the filler and connects with the expansion space; the volume of the expansion space is positively correlated with the volume of the pressure space.
[0015] A further technical solution is that a plurality of wires are arranged in the packing member; the distribution density of the wires is positively correlated with the volume of the packing member; and the distribution density of the wires increases gradually from the inside to the outside of the packing member.
[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) The wire drawing and tightening of the rings on both sides limit the middle position of the expansion direction of the expansion piece, so that the expansion of the expansion piece is formed on the upper and lower sides of the ring, forming two groups of expansion deformation of the expansion piece, so that the metal-coated gasket forms a double seal, thereby improving the sealing effect; the pressure plate applies a clamping force to the expansion piece and the filler piece from the upper and lower directions, and the filler piece diffuses and deforms in the horizontal direction. The deformation direction of the filler piece is limited by the guide strip, so that the filler piece will only deform in a concentrated direction, and the filler piece pushes the expansion piece to expand in the concentrated direction to fill the sealing position, thereby ensuring the sealing effect of the metal-coated gasket.
[0017] (2) The expansion range of the expansion piece refers to the expansion of the expansion piece in the vertical direction, and the expansion depth of the expansion piece refers to the expansion of the expansion piece in the horizontal direction; the expansion range of the expansion piece can be increased by increasing the bending length of the expansion piece, and the expansion depth of the expansion piece can be increased by increasing the number of times the expansion piece is stacked; by adjusting and controlling the expansion range and expansion depth of the expansion piece, the metal-coated gasket can adapt to the sealing requirements of different sealing positions.
[0018] (3) After the medium flows through the heat exchanger, there is a certain amount of heat at the sealing position of the metal-coated gasket, and there is a situation of heat rise; the heat is transferred to the cavity through the expansion piece and the filler piece, and the gas in the cavity expands, pushing the deformation of the cavity, thereby driving the deformation of the expansion piece and the filler piece, thereby improving the sealing effect of the metal-coated gasket under high temperature conditions.
[0019] (4) The ratio of the thickness of the edge of the filler to the total thickness of the filler is related to the volume of the cavity; the wire has a certain thermal conductivity, so that the heat at the sealing position of the metal-coated gasket can be quickly and stably transferred to the cavity, thereby causing the gas in the cavity to expand; at the same time, the edge of the filler with a certain structural strength limits the expansion of the cavity, avoiding the rupture of the filler, thereby ensuring the sealing effect of the metal-coated gasket. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a metal-clad gasket according to an embodiment of the present invention is shown.
[0021] Figure 2 Shows Figure 1 Enlarged structural diagram of point A in the middle.
[0022] Markings in the accompanying drawings: 1, filler; 11, cavity; 111, expansion space; 112, pressurized space; 12, wire; 2, expansion piece; 21, opening; 22, band; 3, pressure plate; 31, guide strip; 32, expansion surface; 321, expansion space; 4, ring; 5, wire drawing. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.
[0024] Figure 1 A schematic structural diagram of a metal-clad gasket according to an embodiment of the present invention is shown. Figure 2 Shows Figure 1The enlarged structure diagram of A in the middle. Figure 1 and Figure 2 As shown, the present invention discloses a metal-clad gasket.
[0025] The metal-clad gasket comprises: a drawing wire 5, a ring member 4, a filler member 1, an expansion member 2 wrapping the filler member 1, and a pressing plate 3 clamping the expansion member 2 from top to bottom.
[0026] The ring 4 surrounds both sides of the filler 1 and is connected inside the expansion member 2. The pressure plate 3 is pressed against the expansion member 2 and the filler 1, and the filler 1 is deformed under force to push the expansion member 2 to expand outward. The wire drawing 5 tightens the rings 4 on both sides to restrict the expansion member 2, so that the expansion of the expansion member 2 is formed on both sides of the ring 4.
[0027] The packing 1 is filled in the expansion piece 2, and the pressure plate 3 is located on the upper and lower sides of the outer surface of the expansion piece 2. The ring pieces 4 are respectively located on both sides of the horizontal direction of the inner surface of the expansion piece 2. The wire drawing 5 passes through the packing 1 and is wound between the two groups of ring pieces 4.
[0028] The metal-clad gasket is installed at the sealing position of the heat exchanger. After tightening the sealing position, the pressure plate 3 is subjected to force. The pressure plate 3 applies a pressing force to the expansion member 2 and the filler member 1. The filler member 1 is subjected to force to form a horizontal deformation. The filler member 1 pushes the expansion member 2 to expand outward in the horizontal direction.
[0029] The wire drawing 5 tightens the rings 4 on both sides to limit the middle position of the expansion direction of the expansion member 2, so that the expansion of the expansion member 2 is formed on the upper and lower sides of the rings 4, forming two groups of expansion deformation of the expansion member 2, so that the metal coated gasket forms a double seal, thereby improving the sealing effect.
[0030] The expansion member 2 forms an opening 21 near the pressure plate 3. The openings 21 are formed on the upper surface of the expansion member 2 and the lower surface of the expansion member 2 along the deformation direction of the filler 1. The pressure plate 3 forms a guide bar 31 near the expansion member 2, and the guide bar 31 extends along the deformation direction of the filler 1. The guide bar 31 passes through the opening 21 and is embedded in the filler 1. The guide bars 31 on the pressure plate 3 in the upper and lower directions are mutually offset. When the pressure plate 3 is subjected to force, the guide bar 31 squeezes the filler 1 to guide the deformation of the filler 1.
[0031] The pressure plate 3 applies a pressing force to the expansion member 2 and the filler member 1 from the top and bottom directions. The filler member 1 diffuses and deforms in the horizontal direction. The deformation direction of the filler member 1 is limited by the guide strip 31, so that the filler member 1 can only deform in a concentrated direction. The filler member 1 pushes the expansion member 2 to expand in a concentrated direction to fill the sealing position, thereby ensuring the sealing effect of the metal-clad gasket.
[0032] The length of the guide strip 31 extending into the expansion member 2 is positively correlated with the thickness of the expansion member 2 in the vertical direction, so that the guide strip 31 can form sufficient squeezing space for the expansion member 2. The thicker the expansion member 2, the longer the guide strip 31 extends into the expansion member 2. The thinner the expansion member 2, the shorter the guide strip 31 extends into the expansion member 2.
[0033] The pressure plate 3 forms an expansion surface 32 near the expansion member 2, and the expansion surface 32 is formed along the expansion direction of the expansion member 2. The expansion surface 32 gradually reduces the thickness of the pressure plate 3, so that an expansion space 321 is formed between the pressure plate 3 and the expansion member 2. When the pressure plate 3 presses the expansion member 2, the expansion surface 32 is used to prevent the expansion surface 32 from pressing the expansion member 2, so that the expansion member 2 has enough space for expansion.
[0034] The expansion member 2 is bent outward near the expansion surface 32 to form a band 22. In order to prevent the band 22 from occupying the expansion space 321 and ensure the expansion of the expansion member 2, the bending positions of the expansion member 2 are stacked in sequence along the expansion direction of the expansion member 2. The stacked bands 22 are inclined, and more space is left in the expansion space 321 for the expansion of the expansion member 2.
[0035] The shape of the expansion surface 32 is related to the expansion degree of the expansion member 2. When the expansion depth of the expansion member 2 is long, the expansion surface 32 is inclined, and the inclination of the expansion surface 32 is relatively gentle. The expansion depth of the expansion member 2 is increased by the expansion surface 32, so that the expansion member 2 expands in a longer depth.
[0036] When the expansion range of the expansion member 2 is large, the expansion surface 32 is inclined, and the inclined state of the expansion surface 32 is relatively steep. The arc transition between the expansion surface 32 and the pressure plate 3 can prevent the expansion surface 32 from crushing the expansion member 2. The expansion range of the expansion member 2 is expanded by the expansion surface 32, so that the expansion member 2 can expand in a larger range.
[0037] The bending length of the expansion member 2 is positively correlated with the expansion range of the expansion member 2. The larger the expansion range of the expansion member 2, the longer the bending length of the expansion member 2, and the fewer times the expansion member 2 is stacked.
[0038] The number of times the expansion member 2 is stacked is positively correlated with the expansion depth of the expansion member 2. The longer the expansion depth of the expansion member 2 is, the more times the expansion member 2 is stacked, and the shorter the bending length of the expansion member 2 is.
[0039] The expansion range of the expansion member 2 is the expansion of the expansion member 2 in the vertical direction, and the expansion depth of the expansion member 2 is the expansion of the expansion member 2 in the horizontal direction. The expansion range of the expansion member 2 can be increased by increasing the bending length of the expansion member 2, and the expansion depth of the expansion member 2 can be increased by increasing the number of times the expansion member 2 is stacked. By adjusting and controlling the expansion range and expansion depth of the expansion member 2, the metal-clad gasket can adapt to the sealing requirements of different sealing positions.
[0040] Cavities 11 are formed on both sides of the filler 1. The height of the cavity 11 along the direction of the adjacent pressure plate 3 is X, and the length of the cavity 11 along the deformation direction of the filler 1 is Y. The ratio of height X: length Y is positively correlated with the expansion range of the expansion member 2. The ratio of height X: length Y is negatively correlated with the expansion depth of the expansion member 2.
[0041] The cavity 11 is located in the deformation direction of both sides of the filler member 1. After the filler member 1 is deformed by force, the cavity 11 deforms outwards to push both sides of the filler member 1 to expand and deform outwards, thereby driving the expansion member 2 to expand and deform outwards.
[0042] The cavity 11 includes an expansion space 111 and a pressure space 112. The pressure space 112 gradually expands along the deformation direction of the filler element 1 and communicates with the expansion space 111.
[0043] After the packing member 1 is deformed by force, an extrusion force is formed on the compressed space 112, and the air in the compressed space 112 transitions to the expansion space 111. The air in the expansion space 111 is forced to push the expansion space 111 to deform, so that the packing member 1 is deformed by force. Since the volume of the expansion space 111 is positively correlated with the volume of the compressed space 112, sufficient air in the compressed space 112 enters the expansion space 111, ensuring that the expansion space 111 can form sufficient expansion.
[0044] When the cavity 11 height X>length Y, the closer the expansion space 111 is to the vertical state, the greater the expansion range of the expansion member 2. When the cavity 11 height X<length Y, the closer the expansion space 111 is to the horizontal state, the greater the expansion depth of the expansion member 2.
[0045] The ratio of the height X and the length Y of the cavity 11 is related to the bending length of the expansion member 2 and the number of times the expansion member 2 is stacked. When the height X of the cavity 11 is greater than the length Y, the longer the bending length of the expansion member 2 is, the fewer the number of times the expansion member 2 is stacked. When the height X of the cavity 11 is less than the length Y, the more the number of times the expansion member 2 is stacked, the shorter the bending length of the expansion member 2 is. The adaptation of the bending length of the cavity 11 and the expansion member 2 and the number of times the expansion member 2 is stacked is completed.
[0046] After the medium flows through the heat exchanger, there is a certain amount of heat at the sealing position of the metal-clad gasket, and there is a situation where the heat rises. The heat is transferred to the cavity 11 through the expansion piece 2 and the filler piece 1. The gas in the cavity 11 expands, pushing the deformation of the cavity 11, thereby driving the deformation of the expansion piece 2 and the filler piece 1, thereby improving the sealing effect of the metal-clad gasket under high temperature conditions.
[0047] A plurality of material wires 12 are arranged in the packing member 1. The distribution density of the material wires 12 is positively correlated with the volume of the packing member 1. The distribution density of the material wires 12 gradually increases from the inside to the outside of the packing member 1.
[0048] Exemplarily, the material 12 is a thermosetting material. The material of the material 12 includes but is not limited to: phenolic resin and polyimide resin. When the material 12 is mixed in the filler 1, the material of the material 12 is relatively soft.
[0049] When the size of the metal-clad gasket is small, the volume of the packing member 1 is small, the deformation of the packing member 1 is small, and the distribution density of the wire 12 is small. When the size of the metal-clad gasket is large, the volume of the packing member 1 is large, the deformation of the packing member 1 is large, and the distribution density of the wire 12 is large.
[0050] After the metal-clad gasket is installed in the sealing position, the metal-clad gasket is squeezed, and the wire 12 pulls the filler 1 to prevent the filler 1 from forming cracks after being deformed by force. After the metal-clad gasket is heated in the sealing position, the wire 12 is cured by heat, which increases the structural strength of the filler 1, so that the filler 1 can deform while maintaining a certain structure to form a seal.
[0051] The distribution density of the wire 12 at the center of the packing 1 is low, the structural strength at the center of the packing 1 is weak, and there is a large amount of deformation. The distribution density of the wire 12 at the edge of the packing 1 is high, the structural strength at the edge of the packing 1 is high, and there is a small amount of deformation. The thickness at the edge of the packing 1 accounts for 3-7% of the total thickness of the packing 1.
[0052] The ratio of the thickness of the edge of the packing member 1 to the total thickness of the packing member 1 is related to the volume of the cavity 11. The wire 12 has a certain thermal conductivity, so that the heat at the sealing position of the metal-clad gasket can be quickly and stably transferred to the cavity 11, thereby causing the gas in the cavity 11 to expand. At the same time, the edge of the packing member 1 with a certain structural strength limits the expansion of the cavity 11, avoiding the rupture of the packing member 1, thereby ensuring the sealing effect of the metal-clad gasket.
[0053] After the packing 1 is subjected to force, the packing 1 deforms greatly inside, and the packing 1 moves from the center to the edge to complete the deformation. This makes the packing 1 deform more inside, and the edge of the packing 1 deform less. By controlling the distribution density of the material wire 12, the material wire 12 changes the deformation amount of the packing 1 accordingly.
[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. A metal-clad gasket, characterized in that: include: Packing member (1); An expansion member (2) wrapping the filler member (1); A pressure plate (3) clamps the expansion member (2) from top to bottom; A ring member (4) surrounding both sides of the filler member (1) and connected inside the expansion member (2); A wire drawing (5) passes through the filler (1) and is wound around the ring (4); The pressure plate (3) is pressed against the expansion member (2) and the filler member (1), and the filler member (1) is deformed under the force to push the expansion member (2) to expand outward; the wire drawing (5) tightens the ring members (4) on both sides to limit the expansion member (2), so that the expansion of the expansion member (2) is formed on both sides of the ring member (4).
2. The metal-clad gasket according to claim 1, characterized in that: The expansion member (2) forms an opening (21) near the pressure plate (3); the pressure plate (3) forms a guide strip (31) near the expansion member (2), and the guide strip (31) extends along the deformation direction of the filler member (1); the guide strip (31) passes through the opening (21) and is embedded in the filler member (1).
3. The metal-clad gasket according to claim 2, characterized in that: The pressure plate (3) forms an expansion surface (32) near the expansion member (2), and the expansion surface (32) is formed along the expansion direction of the expansion member (2); the expansion member (2) is bent outward near the expansion surface (32), and the bending position of the expansion member (2) is sequentially stacked along the expansion direction of the expansion member (2).
4. The metal-clad gasket according to claim 3, characterized in that: The shape of the expansion surface (32) is related to the expansion degree of the expansion piece (2); the bending length of the expansion piece (2) is positively correlated to the expansion range of the expansion piece (2); and the number of times the expansion piece (2) is stacked is positively correlated to the expansion depth of the expansion piece (2).
5. The metal-clad gasket according to claim 2, characterized in that: Cavities (11) are formed on both sides of the filler member (1); the cavity (11) has a height X along the direction of the adjacent pressure plate (3); the cavity (11) has a length Y along the deformation direction of the filler member (1); the ratio of the height X:length Y is positively correlated with the expansion range of the expansion member (2); and the ratio of the height X:length Y is negatively correlated with the expansion depth of the expansion member (2).
6. The metal-clad gasket according to claim 5, characterized in that: The cavity (11) comprises an expansion space (111) and a pressure space (112); the pressure space (112) gradually expands along the deformation direction of the filler (1) and is connected to the expansion space (111); the volume of the expansion space (111) is positively correlated with the volume of the pressure space (112).
7. The metal-clad gasket according to claim 2, characterized in that: A plurality of material threads (12) are arranged in the packing piece (1); the distribution density of the material threads (12) is positively correlated with the volume of the packing piece (1); and the distribution density of the material threads (12) gradually increases from the inside to the outside of the packing piece (1).