Double-ring type sealing gasket

Abstract

The utility model relates to the technical field of sealing gaskets, in particular to a double-ring type sealing gasket, which comprises a metal outer ring and a metal inner ring, and is characterized in that the inner wall of the metal outer ring is fixedly connected with a fixing ring, the outer wall of the fixing ring is fixedly connected with the metal inner ring, the upper end of the fixing ring is fixedly connected with a metal middle ring, and the lower end of the fixing ring is fixedly connected with the metal middle ring. A containing groove is machined in the inner wall of the metal outer ring, and the outer wall of the containing groove is connected with a limiting mechanism. The outer wall of the sealing mechanism is wrapped through the chemical corrosion resistance of fluorine-containing materials of fluororubber and a polytetrafluoroethylene elastic band, the chemical stability and durability of a gasket are enhanced, and a fixing strip on the inner side of a threaded ring downwards pushes the polytetrafluoroethylene elastic band and the fluororubber to move downwards, so that the sealing mechanism is sealed. The graphite composite plate, the graphite belt and the graphite paper are fixed between the metal outer ring and the metal middle ring, so that the mounting and fixing position of the sealing mechanism is more stable, and the overall sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing gaskets, and specifically relates to a double-ring sealing gasket. Background Art

[0002] A sealing gasket is a sealing spare part used in machinery, equipment, pipelines, etc., wherever there is fluid. It is a material used inside and outside to play a sealing role. The sealing gasket is made of metal or non-metal plate-like materials through processes such as cutting, stamping, or cutting, and is used for the sealing connection between pipelines and the sealing connection between machine parts of machine equipment.

[0003] For example, a double-ring sealing gasket with the authorization announcement number of "CN207213139U" solves the problem that the existing double-ring sealing gasket cannot form a complete seal during use and there may be leakage. The above-mentioned extends raised blocks outward through the sealing ring, and the top of the equipment collar is an arc structure, so that the equipment has good sealing performance and effectively prevents leakage. The existing sealing material is made of rubber, with low high-temperature resistance and chemical stability, resulting in increased maintenance costs. At the same time, the sealing material made of rubber is often directly fixed, facing strong external forces, resulting in easy loosening of the sealing position and poor fixity. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems of the existing double-ring sealing gasket, such as low high-temperature resistance and chemical stability, increased maintenance costs, and easy loosening of the sealing position and poor fixity, and to propose a double-ring sealing gasket.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A double-ring sealing gasket, including a metal outer ring and a metal inner ring, characterized in that: the inner wall of the metal outer ring is fixedly connected with a fixed ring, the outer wall of the fixed ring is fixedly connected with the metal inner ring, the upper end of the fixed ring is fixedly connected with a metal middle ring, a placement groove is processed on the inner wall of the metal outer ring, and a limiting mechanism is connected to the outer wall of the placement groove.

[0006] Preferably, the limiting mechanism includes a threaded ring, the outer wall of the threaded ring is fixedly connected with the placement groove, the inner wall of the threaded ring is threadedly connected with an installation ring, and the inner wall of the installation ring is fixedly connected with a fixed strip.

[0007] Preferably, the surface of the fixed ring is fixedly connected with a convex block, and a sealing mechanism is connected to the upper end of the convex block.

[0008] Preferably, the sealing mechanism includes a graphite composite board, the inner wall of the graphite composite board is movably connected with the convex block, the upper end of the graphite composite board is fixedly connected with a graphite strip, and the outer wall of the graphite strip is fixedly connected with graphite paper.

[0009] Preferably, the outer wall of the graphite composite plate is fixedly connected to the fluororubber, the outer wall of the graphite tape is fixedly connected to the fluororubber, and the outer wall of the graphite paper is fixedly connected to the fluororubber.

[0010] Preferably, the outer wall of the fluororubber is fixedly connected to the tetrafluoro elastic band, and the outer wall of the tetrafluoro elastic band abuts against the fixing strip.

[0011] A double-ring type sealing gasket proposed by the present utility model has the beneficial effects that: through a sealing gasket with two independent functional rings inside and outside, the outer ring provides preliminary sealing, the inner ring enhances the sealing effect, and graphite materials such as "graphite composite plate", "graphite tape", and "graphite paper" are used. Due to their excellent high temperature resistance and chemical stability, the durability is improved and the maintenance cost is also reduced.

[0012] The chemical corrosion resistance characteristics of fluorine-containing materials such as "fluororubber" and "tetrafluoro elastic band" wrap the outer wall of the sealing mechanism, enhancing the chemical stability and durability of the gasket. The fixing strip inside the threaded ring pushes the tetrafluoro elastic band and the fluororubber downward, realizing the fixation of the graphite composite plate, graphite tape, and graphite paper between the metal outer ring and the metal middle ring, making the installation and fixation position of the sealing mechanism more stable and improving the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a front view sectional structural diagram in

[0015] Figure 3 is Figure 1 a top view sectional structural diagram in

[0016] Figure 4 is Figure 2 an enlarged structural diagram at A in

[0017] Figure 5 is Figure 2 an enlarged structural diagram of the sealing mechanism in

[0018] Figure 6 is Figure 2 an enlarged structural diagram of the limiting mechanism in

[0019] In the figure: 1, metal outer ring; 2, metal inner ring; 3, fixing ring; 4, metal middle ring; 5, placement groove; 6, limiting mechanism, 601, threaded ring, 602, mounting ring, 603, fixing strip; 7, convex block; 8, sealing mechanism, 801, graphite composite plate, 802, graphite tape, 803, graphite paper; 9, fluororubber; 10, tetrafluoro elastic band. Detailed implementation mode

[0020] The present utility model will be further described below with reference to the accompanying drawings:

[0021] Embodiment 1:

[0022] Please refer to Figures 1-6 : In this embodiment, a double-ring sealing gasket includes a metal outer ring 1 and a metal inner ring 2. The inner wall of the metal outer ring 1 is fixedly connected to a fixing ring 3, the outer wall of the fixing ring 3 is fixedly connected to the metal inner ring 2, the upper end of the fixing ring 3 is fixedly connected to a metal middle ring 4, a placing groove 5 is machined on the inner wall of the metal outer ring 1, and a limiting mechanism 6 is connected to the outer wall of the placing groove 5.

[0023] The limiting mechanism 6 includes a threaded ring 601. By changing the height positions of the mounting ring 602 and the fixing strip 603 on the threaded ring 601, the fixing strip 603 can limit the positions of the inner fluororubber 9 and the polytetrafluoroethylene elastic band 10. The outer wall of the threaded ring 601 is fixedly connected to the placing groove 5, the inner wall of the threaded ring 601 is threadedly connected to the mounting ring 602, and the inner wall of the mounting ring 602 is fixedly connected to the fixing strip 603;

[0024] The chemical corrosion resistance characteristics of the fluorine-containing materials "fluororubber 9" and "polytetrafluoroethylene elastic band 10" wrap the outer wall of the sealing mechanism 8, enhancing the chemical stability and durability of the gasket. And the fixing strip 603 inside the threaded ring 601 pushes the polytetrafluoroethylene elastic band 10 and the fluororubber 9 downward, realizing the fixation of the graphite composite plate 801, the graphite strip 802 and the graphite paper 803 between the metal outer ring 1 and the metal middle ring 4, making the installation and fixing position of the sealing mechanism more stable and improving the overall sealing performance.

[0025] The surface of the fixing ring 3 is fixedly connected to a convex block 7, and the upper end of the convex block 7 is connected to a sealing mechanism 8. A gasket is formed by the graphite composite plate 801, the graphite strip 802 and the graphite paper 803 to achieve the sealing effect on the surface. The sealing mechanism 8 includes a graphite composite plate 801, the inner wall of the graphite composite plate 801 is movably connected to the convex block 7, the upper end of the graphite composite plate 801 is fixedly connected to the graphite strip 802, and the outer wall of the graphite strip 802 is fixedly connected to the graphite paper 803;

[0026] The sealing gasket with two independent functional rings inside and outside provides preliminary sealing for the outer ring and enhances the sealing effect for the inner ring. And the graphite materials "graphite composite plate 801", "graphite strip 802" and "graphite paper 803" are used. Due to their excellent high-temperature resistance and chemical stability, the durability is improved and the maintenance cost is reduced.

[0027] Working principle:

[0028] Assembly stage

[0029] By placing the sealing mechanism 8 at the upper end of the fixing ring 3 and using a tool to screw and rotate the mounting ring 602 on the threaded ring 601, the fixing strip 603 inside the threaded ring 601 pushes the PTFE elastic band 10 and the fluororubber 9 downward, and the graphite composite plate 801, the graphite tape 802, and the graphite paper 803 on the inner wall of the fluororubber 9 move downward until the inner wall of the graphite composite plate 801 enters the bump 7 on the fixing ring 3 to fix the position of the upper end of the graphite composite plate 801. The fixing strip 603 restricts the PTFE elastic band 10 and the fluororubber 9, fixing the graphite composite plate 801, the graphite tape 802, and the graphite paper 803 between the metal outer ring 1 and the metal middle ring 4. In the same operation mode, the metal middle ring 4 and the metal inner ring 2 are installed to realize the sealing gasket in which the metal middle ring 4, the metal inner ring 2, and the metal outer ring 1 form two independent functional rings inside and outside.

[0030] Embodiment 2:

[0031] Please refer to Figures 1-6 : In this embodiment, the outer wall of the graphite composite plate 801 is fixedly connected to the fluororubber 9, the outer wall of the graphite tape 802 is fixedly connected to the fluororubber 9, the outer wall of the graphite paper 803 is fixedly connected to the fluororubber 9, the outer wall of the fluororubber 9 is fixedly connected to the PTFE elastic band 10, and the outer wall of the PTFE elastic band 10 abuts against the fixing strip 603.

[0032] Working principle

[0033] By utilizing the chemical corrosion resistance characteristics of the fluorine-containing materials of the "fluororubber 9" and the "PTFE elastic band 10", the chemical stability and durability of the gasket made of the graphite composite plate 801, the graphite tape 802, and the graphite paper 803 are enhanced. And during installation, the "polytetrafluoroethylene dispersion emulsion" can be used as a lubricant on the outer wall to improve the lubricity and wear resistance of the gasket and reduce the maintenance cost.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-ring sealing gasket, comprising a metal outer ring (1) and a metal inner ring (2), characterized in that: The inner wall of the metal outer ring (1) is fixedly connected to the fixed ring (3), the outer wall of the fixed ring (3) is fixedly connected to the metal inner ring (2), the upper end of the fixed ring (3) is fixedly connected to the metal middle ring (4), a placement groove (5) is machined on the inner wall of the metal outer ring (1), and a limiting mechanism (6) is connected to the outer wall of the placement groove (5).

2. The double-ring type sealing gasket according to claim 1, wherein: The limiting mechanism (6) includes a threaded ring (601), the outer wall of the threaded ring (601) is fixedly connected to the placement groove (5), the inner wall of the threaded ring (601) is threadedly connected to the mounting ring (602), and the inner wall of the mounting ring (602) is fixedly connected to the fixing strip (603).

3. A double-ring type sealing gasket according to claim 1, characterized in that: The surface of the fixed ring (3) is fixedly connected to a convex block (7), and a sealing mechanism (8) is connected to the upper end of the convex block (7).

4. The double-ring type gasket according to claim 3, wherein: The sealing mechanism (8) includes a graphite composite plate (801), the inner wall of the graphite composite plate (801) is movably connected to the convex block (7), the upper end of the graphite composite plate (801) is fixedly connected to a graphite strip (802), and the outer wall of the graphite strip (802) is fixedly connected to a graphite paper (803).

5. A double-ring type sealing gasket according to claim 4, characterized in that: The outer wall of the graphite composite plate (801) is fixedly connected to a fluororubber (9), the outer wall of the graphite strip (802) is fixedly connected to the fluororubber (9), and the outer wall of the graphite paper (803) is fixedly connected to the fluororubber (9).

6. The double-ring type sealing gasket according to claim 5, characterized in that: The outer wall of the fluororubber (9) is fixedly connected to a tetrafluoro elastic band (10), and the outer wall of the tetrafluoro elastic band (10) abuts against the fixing strip (603).

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