Double-layer honeycomb-shaped composite sealing gasket for carbon dioxide foaming reaction kettle

Abstract

The utility model provides a double-layer honeycomb-shaped composite sealing gasket for a carbon dioxide foaming reaction kettle, which comprises an upper-layer gasket and a lower-layer gasket arranged on the lower surface of the upper-layer gasket, and each of the upper-layer gasket and the lower-layer gasket comprises a honeycomb frame formed by a plurality of honeycomb cavities. A sealing layer is arranged on the surface, away from the lower-layer gasket, of the upper-layer gasket, and a polymer coating is arranged on the surface, away from the upper-layer gasket, of the sealing layer. According to the honeycomb frame, the weight is reduced, meanwhile, pressure can be effectively dispersed, the pressure resistance and impact resistance of the gasket are improved, the gasket is made of metal alloy materials and can cope with various complex working conditions, and the honeycomb cavity is filled with the macromolecule filling piece matched with the structure, so that the performance stability of the gasket is guaranteed, and the service life of the gasket is prolonged. The spiral lines and the tiny protrusions of the upper gasket increase the contact area with the sealing face, the sealing effect is improved, and the sealing performance and the corrosion resistance of the gasket are enhanced through the polymer coating.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing gaskets, and particularly relates to a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor. Background Art

[0002] A sealing gasket is a component used at the sealed joints of industrial machines, equipment, pipelines, etc. Its main function is to fill the gap between two flanges to make it airtight and prevent the leakage of gas or fluid.

[0003] In the supercritical carbon dioxide foaming process, the graphite sealing gasket of the reactor is easily corroded by carbon dioxide, has a limited service life, and is relatively troublesome to replace. Each time the reactor is disassembled, the sealing gasket needs to be replaced. After replacement, it is necessary to test whether it is completely sealed to check for air leakage or liquid leakage. Therefore, it is necessary to introduce compressed air into the reactor to check for air leakage. In a high-pressure environment, if there is air leakage, the gasket may be broken by the compressed air and needs to be replaced again. However, although common metal gaskets are not easily damaged, they require a large tightening force during installation, are likely to damage the sealing surface, and their sealing performance is easily affected in a corrosive environment; rubber gaskets have limited temperature and pressure resistance, are easily softened, deformed or extruded from the sealing gap in a high-temperature and high-pressure environment, resulting in sealing failure, and are also easily eroded by chemical substances and have a short service life. Therefore, a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor is proposed. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor. The sealing gasket is made of a metal-polymer composite, and simultaneously has the advantages of high strength, toughness, corrosion resistance and reusability, and can also meet the sealing requirements in various complex environments in industrial production.

[0005] To achieve the above technical purposes, the technical solution adopted by the utility model is:

[0006] A double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein it includes an upper gasket and a lower gasket arranged on the lower surface of the upper gasket. Both the upper gasket and the lower gasket include a honeycomb frame composed of a number of honeycomb cavities, and the honeycomb cavities are filled with polymer fillers with a matching structure. A sealing layer is arranged on one surface of the upper gasket away from the lower gasket, and a polymer coating is arranged on one surface of the sealing layer away from the upper gasket.

[0007] Preferably, for the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, the shapes of both the upper gasket and the lower gasket are circular or elliptical.

[0008] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the structure of the honeycomb cavity is a regular hexagon, and the area of each honeycomb cavity is 2 ± 0.5 mm 2 .

[0009] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the material of the honeycomb frame is selected from one of titanium alloy, chromium alloy and nickel alloy.

[0010] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the material of the polymer filling member is selected from one of polyether ether ketone, polyether imide and polyimide.

[0011] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein spiral grooves and protrusions are provided on the sealing layer.

[0012] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the height of the protrusion is 0.1 ± 0.02 mm.

[0013] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the material of the polymer coating is selected from one of polytetrafluoroethylene, fluororubber and polyurethane.

[0014] Preferably, the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, wherein the upper gasket and the lower gasket are connected by mortise and tenon, snap or adhesive.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows:

[0016] (1) For the double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor of the present invention, the metal alloy endows the gasket with extremely high strength and pressure resistance, and can withstand large pressure and impact force, providing a supporting role as a gasket. The selection of metal materials also enables the sealing gasket to have the potential for repeated use in an environment where it is often disassembled. As long as the operation is standardized, the integrity of the sealing gasket will be well maintained.

[0017] (2) The utility model discloses a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor. The honeycomb frame can effectively disperse pressure while reducing weight, thereby improving the pressure resistance and impact resistance of the gasket. The gasket is made of metal alloy material. Due to its good toughness, excellent elasticity and deformation ability, it can cope with various complex working conditions. The honeycomb cavity is filled with structurally compatible polymer fillers, which are filled inside the honeycomb structure to ensure the stable performance of the gasket. The spiral texture and tiny protrusions of the upper gasket increase the contact area with the sealing surface, thereby improving the sealing effect. The polymer coating enhances its sealing and corrosion resistance. The support and cushioning of the lower gasket ensure the stability of the gasket under high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external three-dimensional structure of the double-layer honeycomb composite sealing gasket used for the carbon dioxide foaming reactor of the utility model.

[0019] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0020] Figure 3 The utility model is a schematic diagram of the internal three-dimensional structure of a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor.

[0021] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the double-layer honeycomb composite sealing gasket used for the carbon dioxide foaming reactor of the utility model.

[0022] Explanation of the reference numerals: 1-upper gasket, 2-lower gasket, 3-honeycomb frame, 4-polymer filler, 5-spiral pattern, 6-protrusion, 8-honeycomb cavity, 9-sealing layer. DETAILED DESCRIPTION

[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "front, back", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] likeFigures 1-4 , a double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, comprising an upper gasket 1 and a lower gasket 2 provided on the lower surface of the upper gasket 1. Both the upper gasket 1 and the lower gasket 2 include a honeycomb frame 3 composed of a number of honeycomb cavities 8, and the honeycomb cavities 8 are filled with structurally matched polymer fillers 4. A sealing layer 9 is provided on one surface of the upper gasket 1 away from the lower gasket 2, and a polymer coating is provided on one surface of the sealing layer 9 away from the upper gasket 1.

[0026] The shapes of both the upper gasket 1 and the lower gasket 2 are circular or elliptical; the structure of the honeycomb cavity 8 is a regular hexagon, and the area of each honeycomb cavity 8 is 2 ± 0.5 mm 2 ; the material of the honeycomb frame 3 is selected from one of titanium alloy, chromium alloy and nickel alloy.

[0027] The material of the polymer filler 4 is selected from one of polyetheretherketone, polyetherimide and polyimide; spiral grooves 5 and protrusions 6 are provided on the sealing layer 9; the height of the protrusions 6 is 0.1 ± 0.02 mm; the material of the polymer coating is selected from one of polytetrafluoroethylene, fluororubber and polyurethane.

[0028] The upper gasket 2 and the lower gasket 2 are connected by mortise and tenon, snap or adhesion.

[0029] The honeycomb frame 3 is composed of regular hexagon honeycomb cavities 8, with strong structural stability and reliability; the upper sealing gasket 1 and the lower sealing gasket 2 composed of the honeycomb frame 3, made of one of titanium alloy, chromium alloy and nickel alloy, provide a solid support structure for the gasket. The honeycomb frame 3 reduces the weight while ensuring the strength, and has good elasticity and deformation ability, can adapt to different sealing surface shapes, and effectively disperses pressure and impact force.

[0030] The shape of the gasket body is one of circular or elliptical; the upper sealing gasket 1 and the lower sealing gasket 2 composed of the honeycomb frame 3 made of metal alloy, with the honeycomb cavities 8 filled with polymer fillers 4 inside, can choose PEEK as the filling material. PEEK plays the role of high temperature resistance and wear resistance, and at the same time, the chemical stability of PEEK enables it not to be corroded by most chemical substances, ensuring the sealing reliability.

[0031] The functions of the spiral grooves 5 and the protrusions 6 are to increase the contact area with the sealing surface, improve the sealing effect and prevent the gasket from slipping; a polymer coating is applied on the upper sealing gasket, and PTFE can be selected as the polymer coating. PTFE has excellent chemical stability, can resist the corrosion of most chemical substances, and has good high temperature and low temperature resistance, and is often used as the sealing gasket for pipelines in chemical enterprises.

[0032] The upper gasket 1 and the lower gasket 2 can be adhesively connected. After connection, the lower gasket 2 serves as a support and buffer layer, providing support force and buffering effect for the upper layer, reducing the pressure impact borne by the upper sealing layer, and protecting the overall structure of the gasket.

[0033] Finally, it should be noted that the above specific implementation manners are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor, characterized in that The invention comprises an upper gasket (1) and a lower gasket (2) arranged on the lower surface of the upper gasket (1), wherein the upper gasket (1) and the lower gasket (2) both comprise a honeycomb frame (3) formed by a plurality of honeycomb cavities (8), the honeycomb cavities (8) are filled with structurally compatible polymer fillers (4), a sealing layer (9) is arranged on a surface of the upper gasket (1) away from the lower gasket (2), and a polymer coating is arranged on a surface of the sealing layer away from the upper gasket (1).

2. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, characterized in that The upper gasket (1) and the lower gasket (2) are both circular or elliptical in shape.

3. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, wherein The structure of the honeycomb cavity (8) is a regular hexagon, and the area of each honeycomb cavity (8) is 2 ± 0.5 mm 2 .

4. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, characterized in that, The material of the honeycomb frame (3) is selected from one of titanium alloy, chromium alloy and nickel alloy.

5. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, characterized in that, The material of the polymer filler (4) is selected from one of polyetheretherketone, polyetherimide and polyimide.

6. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, wherein, The sealing layer (9) is provided with spiral patterns (5) and protrusions (6).

7. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 6, wherein, The height of the protrusion (6) is 0.1±0.02 mm.

8. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, characterized in that, The material of the polymer coating is selected from one of polytetrafluoroethylene, fluororubber and polyurethane.

9. The double-layer honeycomb composite sealing gasket for a carbon dioxide foaming reactor according to claim 1, characterized in that, The upper gasket (1) and the lower gasket (2) are connected by means of mortise and tenon joints, snap fasteners or gluing.

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