Combined sealing gasket

Abstract

The utility model discloses a combined sealing gasket, which relates to the field of sealing gaskets and comprises a gasket, the gasket is of a circular ring structure, sealing layers are arranged on two sides of the gasket, the sealing layers are positioned between the inner edge and the outer edge of the gasket, and a plurality of first through holes distributed in an annular array are arranged in the gasket. A plurality of positioning holes are formed in the gasket and located in the side edge of the first through hole, and the sealing layer is connected with the positioning holes. An inner isolation ring is arranged on the inner edge of the gasket, and an outer isolation ring is arranged on the outer edge of the gasket. The utility model provides combined multi-sealing protection, so that the sealing device can still keep a good sealing effect under complex working conditions such as high temperature, high pressure, chemical corrosion and the like, has stability and durability, and greatly reduces the risk of sealing failure caused by material aging or assembly error.

Description

Technical Field

[0001] The utility model relates to the field of gaskets, and more specifically, to a combined gasket. Background Technique

[0002] In today's industrial environment, gaskets are widely used in fields such as petrochemical, power, aerospace, automotive manufacturing, and pharmaceuticals. Gaskets are not only limited to preventing leakage but also play the roles of isolating different media, preventing pollution, and protecting equipment. Gaskets are specifically applied between two contact surfaces (such as between two flanges) to form a seal, ensuring that the equipment maintains tightness during operation and preventing internal media from leaking into the external environment. A combined gasket is a sealing structure composed of multiple components assembled together in a specific manner.

[0003] For example, Chinese Patent No. 201921769674.2 discloses a combined gasket that seals the splicing part of two semi-circular pieces, making it difficult for the medium in the barrier channel or device to leak out through the splicing part of the two semi-circular pieces. However, the above-mentioned combined gasket still has the following deficiencies: Although the splicing part of this gasket is sealed, the control of material selection and assembly process is more stringent, and it is more vulnerable to damage or deterioration than an integral gasket. The splicing seal may fail due to mechanical stress or temperature changes, increasing the risk of leakage.

[0004] In response to the problems in the related art, no effective solution has been proposed yet. Content of the Utility Model

[0005] In response to the problems in the related art, the utility model proposes a combined gasket to overcome the above-mentioned technical problems existing in the existing related art.

[0006] To this end, the specific technical solution adopted by the utility model is as follows:

[0007] A combined gasket includes a gasket. The gasket has an annular structure, and sealing layers are provided on both sides of the gasket. The sealing layers are located between the inner edge and the outer edge of the gasket. A number of first through holes are arranged in the gasket in an annular array. A number of positioning holes are provided on the side of the first through holes in the gasket, and the sealing layers are connected to the positioning holes; an inner isolation ring is provided at the inner edge of the gasket, and an outer isolation ring is provided at the outer edge of the gasket.

[0008] Furthermore, in order to play a sealing role and reduce the risk of leakage, the sealing layer includes a sealing body provided on the side wall of the gasket. A number of second through holes are arranged in the sealing body in an annular array. The number of the second through holes is the same as that of the first through holes and forms a one-to-one correspondence; a positioning block is provided in the positioning hole on the side of the sealing body close to the gasket.

[0009] Furthermore, in order to block the penetration of the medium, the inner isolation ring includes an inner isolation ring disposed at the inner edge of the gasket, and sealing rings are disposed on both sides of the inner isolation ring and on the side wall of the gasket; the outer diameter of the sealing ring is greater than the outer diameter of the inner isolation ring.

[0010] Furthermore, in order to not only prevent the intrusion of external media but also prevent the leakage of media from the inside to the outside, the outer isolation ring includes an outer isolation ring disposed at the outer edge of the gasket, an annular groove is provided on the circumferential side wall of the gasket, and an annular rib is provided on the inner ring of the outer isolation ring and within the annular groove.

[0011] The beneficial effects of the present utility model are as follows:

[0012] (1) The present utility model provides a combined multiple - seal protection, enabling it to maintain a good sealing effect under complex working conditions such as high temperature, high pressure, and chemical corrosion, and having stability and durability, greatly reducing the risk of seal failure caused by material aging or assembly errors.

[0013] (2) By providing a sealing layer, a sealing function is achieved, the contact area of the sealing interface is increased, and its flexibility is used to fill the minute unevenness on the surface of the connection interface of equipment such as flanges, reducing the leakage risk. Through the connection with the positioning holes, the sealing layer ensures good fit with the gasket under high - pressure or high - temperature environments, preventing displacement or detachment.

[0014] (3) By providing an outer isolation ring and an inner isolation ring, the inner and outer edges of the gasket are sealed, effectively improving the sealing effect at the inner edge of the gasket. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic structural view of a combined gasket according to an embodiment of the present utility model;

[0017] Figure 2 is a cross - sectional view of a combined gasket according to an embodiment of the present utility model;

[0018] Figure 3 is a schematic structural view of the gasket in a combined gasket according to an embodiment of the present utility model;

[0019] Figure 4It is a schematic structural diagram of an inner isolation ring in a combined gasket according to an embodiment of the present utility model.

[0020] In the figure:

[0021] 1. Gasket; 2. Sealing layer; 201. Sealing main body; 202. Second through hole; 203. Positioning block; 3. First through hole; 4. Positioning hole; 5. Outer isolation ring; 501. Outer isolation ring; 502. Annular groove; 503. Annular rib; 6. Inner isolation ring; 601. Inner isolation ring; 602. Sealing ring. Specific embodiments

[0022] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] According to an embodiment of the present utility model, a combined gasket is provided.

[0024] Now, the present utility model will be further described in conjunction with the accompanying drawings and specific embodiments. As Figures 1-4 shown, the combined gasket according to an embodiment of the present utility model includes a gasket 1. The gasket 1 has an annular structure, and sealing layers 2 are provided on both sides of the gasket 1. The sealing layers 2 are located between the inner edge and the outer edge of the gasket 1. A plurality of first through holes 3 distributed in an annular array are provided inside the gasket 1. A plurality of positioning holes 4 are provided inside the gasket 1 and on the side of the first through holes 3, and the sealing layers 2 are connected to the positioning holes 4. An inner isolation ring 6 is provided at the inner edge of the gasket 1, and an outer isolation ring 5 is provided at the outer edge of the gasket 1.

[0025] With the above solution, the present utility model provides a combined multi - layer sealing protection, enabling it to maintain a good sealing effect under complex working conditions such as high temperature, high pressure, and chemical corrosion, and having stability and durability, greatly reducing the risk of sealing failure caused by material aging or assembly errors.

[0026] In one embodiment, for the above-mentioned sealing layer 2, the sealing layer 2 includes a sealing main body 201 provided on the side wall of the gasket 1. A number of second through holes 202 distributed in an annular array are provided inside the sealing main body 201. The number of the second through holes 202 is the same as that of the first through holes 3 and they form a one-to-one correspondence; a positioning block 203 is provided on the side of the sealing main body 201 close to the gasket 1 and located inside the positioning hole 4, thus playing a sealing role, increasing the contact area of the sealing interface, and using its flexibility to fill the minute unevenness on the surface of the connection interface of equipment such as flanges, reducing the leakage risk. In addition, through the connection with the positioning hole 4, the sealing layer 2 ensures good fit with the gasket 1 in a high-pressure or high-temperature environment, preventing displacement or detachment. In addition, the sealing layer 2 and the gasket 1 can be connected through an adhesive layer according to actual requirements.

[0027] The working principle of the sealing layer 2 is as follows: The sealing layer 2 is located on both sides of the gasket 1 and contacts the connection interface of the flange. The bolts on the flange pass through the second through holes 202 and the first through holes 3. After the two flanges are connected, the sealing main body 201 fully fills the gap between the flange connection interfaces, and under the restriction of the bolts on the flange, the overall stability of the sealing layer 2 is higher.

[0028] In one embodiment, for the above-mentioned inner isolation ring 6, the inner isolation ring 6 includes an inner isolation ring 601 provided at the inner edge of the gasket 1, and sealing rings 602 are provided on both sides of the inner isolation ring 601 and located on the side wall of the gasket 1; the outer diameter of the sealing ring 602 is larger than the outer diameter of the inner isolation ring 601, so as to be able to block the penetration of the medium and improve the sealing effect of the gasket.

[0029] In one embodiment, for the above-mentioned outer isolation ring 5, the outer isolation ring 5 includes an outer isolation ring 501 provided at the outer edge of the gasket 1, an annular groove 502 is provided on the circumferential side wall of the gasket 1, and an annular rib 503 is provided on the inner ring of the outer isolation ring 501 and located inside the annular groove 502, so as to enhance the sealing effect of the outer edge of the gasket 1 through the combination of the outer isolation ring 501 and the annular rib 503. The outer isolation ring 5 not only prevents the intrusion of external media, but also prevents the leakage of media from the inside to the outside.

[0030] The working principle of the outer isolation ring 5 and the inner isolation ring 6 is as follows: The inner isolation ring 601 and the sealing rings 602 act as the first barrier to prevent the inward penetration of the medium, thus effectively improving the sealing effect at the inner edge of the gasket 1.

[0031] The annular groove 502 is provided on the circumferential side wall of the gasket 1, and the annular rib 503 is embedded therein to form a tight fit. Under high-pressure or high-temperature conditions, the annular rib 503 provides additional mechanical locking force to ensure good sealing effect of the outer isolation ring 5 at the outer edge of the gasket 1.

[0032] To facilitate the understanding of the above technical solution of the present utility model, the working principle or operation mode of the present utility model in the actual process will be described in detail below.

[0033] In actual application, the gasket 1 is placed between the flanges (which can also be used in other similar devices). The inner isolation ring 6 and the outer isolation ring 5 respectively seal the inner and outer edges of the gasket 1. The sealing layer 2 fills the two contact surfaces of the gasket to ensure that the sealing gasket fits tightly with the flange surface. The inner and outer isolation rings respectively prevent the medium from penetrating through the edges, and the sealing layer 2 is based on the connection interface to provide all-round sealing.

[0034] In addition, the sealing layer 2, the outer isolation ring 5 and the inner isolation ring 6 of the present utility model are preferably made of materials suitable for environments with high temperature, high pressure and corrosive media, such as fluororubber and silicone rubber.

[0035] In summary, the present utility model provides multiple sealing protections, enabling it to maintain a good sealing effect under complex working conditions such as high temperature, high pressure and chemical corrosion, and having stability and durability, greatly reducing the risk of sealing failure caused by material aging or assembly errors. By setting the sealing layer 2, the sealing effect is achieved, the contact area of the sealing interface is increased, and its flexibility is used to fill the tiny unevenness on the surface of the connection interface of devices such as flanges, reducing the leakage risk. The sealing layer 2 ensures good fit with the gasket 1 under high pressure or high temperature environments through its connection with the positioning hole 4, preventing displacement or detachment. By setting the outer isolation ring 5 and the inner isolation ring 6, the inner and outer edges of the gasket 1 are sealed, effectively improving the sealing effect at the inner edge of the gasket 1.

[0036] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combined sealing gasket, comprising a gasket (1), characterized in that: The gasket (1) is a circular ring structure, and sealing layers (2) are provided on both sides of the gasket (1), the sealing layer (2) is located between the inner edge and the outer edge of the gasket (1), a plurality of first through holes (3) distributed in a circular array are provided in the gasket (1), a plurality of positioning holes (4) are provided in the gasket (1) and located on the sides of the first through holes (3), and the sealing layer (2) is connected to the positioning holes (4); An inner isolation ring (6) is provided at the inner edge of the gasket (1), and an outer isolation ring (5) is provided at the outer edge of the gasket (1).

2. A combined sealing gasket according to claim 1, characterized in that: The sealing layer (2) comprises a sealing body (201) arranged on the side wall of the gasket (1), and a plurality of second through holes (202) distributed in a ring array are arranged inside the sealing body (201), and the number of the second through holes (202) is the same as that of the first through holes (3) and forms a one-to-one correspondence.

3. A combined sealing gasket according to claim 2, characterized in that: A positioning block (203) is provided on one side of the sealing body (201) close to the gasket (1) and located inside the positioning hole (4).

4. A combined sealing gasket according to claim 2 or 3, characterized in that: The inner isolation ring (6) comprises an inner isolation ring (601) arranged at the inner edge of the gasket (1), and sealing rings (602) are arranged on both sides of the inner isolation ring (601) and on the side walls of the gasket (1).

5. A combined sealing gasket according to claim 4, characterized in that: The outer diameter of the sealing ring (602) is greater than the outer diameter of the inner isolation ring (601).

6. A combined sealing gasket according to claim 5, characterized in that: The outer isolation ring (5) comprises an outer isolation ring (501) arranged at the outer edge of the gasket (1), an annular groove (502) is arranged on the circumferential side wall of the gasket (1), and an annular convex strip (503) is arranged on the inner ring of the outer isolation ring (501) and located in the annular groove (502).

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