Wave-tooth gasket and blocking type gasket sealing device thereof

Abstract

The utility model discloses a wave tooth gasket and a blocking type gasket sealing device thereof, the wave tooth gasket comprises a gasket body and at least one protruding block, one end of the protruding block extends from the side wall of the gasket along the radial direction of the gasket, the other end of the protruding block is fixedly provided with a connector, and the connector is used for being connected with high-pressure liquid or high-pressure gas; an inner flow channel is formed in the joint, the convex block and part of the gasket; a through sealing cavity connecting channel is formed in the thickness direction of the gasket, and the tail end of the inner flow channel 8 is communicated with the sealing cavity connecting channel. The upper surface and the lower surface of the gasket body are each fixedly provided with at least two annular gaskets, the two annular gaskets on the same surface are concentrically arranged and are spaced by a certain distance, and therefore the gasket body and the two annular gaskets form an annular groove 10. The end, connected with the channel, of the sealing cavity is located in the annular groove. And the hardness of the annular gasket is smaller than that of the upstream flange / downstream flange.

Description

TECHNICAL FIELD

[0001] The utility model relates to a barrier type gasket structure, concretely relates to a wave tooth gasket and barrier type gasket sealing device thereof. BACKGROUND

[0002] The gasket sealing of prior art adopts octagonal gasket, oval gasket or wave tooth gasket to be arranged between upstream flange and downstream flange to isolate material leakage. The existing wave tooth gasket increases effective sealing area compared with ordinary flange and enhances sealing effect. Figure 1 As shown in the figure, the existing wave tooth gasket is provided with wave tooth gasket 5 between upstream flange and downstream flange, and the wave tooth gasket is provided with wave tooth 4 towards upstream flange and downstream flange sides respectively.

[0003] CN108775459B discloses a kind of barrier material leakage of high-pressure liquid or gas gasket sealing device and method, the gasket sealing device adopts sealing liquid or sealing gas higher than material and atmospheric pressure to isolate material and atmosphere with lower pressure, to achieve the purpose of material zero leakage. In the gasket sealing device, annular sealing gasket structure for preventing volatile gas material leakage by high-pressure liquid or high-pressure gas is arranged between the connecting part of upstream flange and downstream flange, and the sealing gasket structure is respectively provided with gas inlet or liquid inlet of delivery pipe for connecting external high-pressure liquid or high-pressure gas source and gas outlet for venting. The sealing device uses sealing liquid or sealing gas higher than process pressure to isolate material and atmosphere, but since sealing part is surrounded by flange bolt, additional transition connecting accessory is needed to make sealing liquid or sealing gas enter sealing cavity on both sides of gasket smoothly, so the structure is relatively complex and the size of gasket is relatively large. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of wave tooth gasket and barrier type gasket sealing device thereof, the gasket sealing device structure is simple, when using bolt fixed connection upstream flange and downstream flange, flange is compressed in the gasket located in it, respectively form upstream flange sealing cavity and downstream flange sealing cavity, then utilize channel to make high-pressure gas / liquid pass through inner flow channel, sealing cavity connection channel into sealing cavity to form high-pressure area in sequence.

[0005] The utility model aims at realizing by the following technical scheme:

[0006] A wave tooth gasket, including gasket body and at least one lug, one end of the lug extends along the radial direction of the side wall of the gasket, the other end of the lug is fixedly provided with a connector, and the connector is used to connect high-pressure liquid or high-pressure gas; an inner flow channel is formed in the connector, the lug and part of the gasket;

[0007] A through sealing cavity connecting channel is formed along the thickness direction of the gasket, and the end of the inner flow channel 8 is in communication with the through sealing cavity connecting channel;

[0008] Furthermore, at least two annular gaskets are fixedly arranged on the upper and lower surfaces of the gasket body, and the two annular gaskets on the same surface are concentrically arranged at a distance, so that the gasket body, the two annular gaskets form an annular groove 10; and the end of the sealing cavity connecting channel is located at the annular groove;

[0009] Furthermore, the hardness of the annular gasket is less than the hardness of the upstream flange / downstream flange.

[0010] Preferably, the material of the annular gasket is graphite or polytetrafluoroethylene.

[0011] Further, the inner flow channel and the sealing cavity connecting channel are arranged vertically.

[0012] Further, the protrusions are arranged at a certain angle around the center of the gasket.

[0013] Further, the distance between the two annular gaskets on the same surface is 1-5mm.

[0014] Preferably, the number of protrusions is more than 2, and the protrusions are uniformly arranged circumferentially around the gasket.

[0015] A barrier type gasket sealing device, comprising an upstream flange, a downstream flange and the wave tooth gasket, the upstream flange and the downstream flange sandwiching the wave tooth gasket; and part of the inner wall of the upstream flange and the two annular gaskets of the wave tooth gasket facing the upstream material form an upstream sealing cavity, and part of the inner wall of the downstream flange and the two annular gaskets of the wave tooth gasket facing the downstream material form a downstream sealing cavity.

[0016] The two ends of the sealing cavity connecting channel are in communication with the upstream sealing cavity and the downstream sealing cavity respectively; and the high-pressure liquid or high-pressure gas from the outside flows through the inner flow channel, the sealing cavity connecting channel, and then flows into the upstream sealing cavity and the downstream sealing cavity.

[0017] Furthermore, the joint is in communication with the high-pressure liquid or high-pressure gas conveying pipeline or the pressure tank storing high-pressure liquid or high-pressure gas through the pipeline. The high-pressure liquid or gas from the outside of the energy storage tank flows through the inner flow channel, the sealing cavity connecting channel, and then flows into the upstream sealing cavity and the downstream sealing cavity, so that a high-pressure area is formed in the upstream sealing cavity and the downstream sealing cavity.

[0018] Further, the material of the gasket body is selected from one of the following materials: carbon steel, 304 stainless steel and 316 stainless steel. According to the actual situation, the gasket material can also use other metal or non-metal materials, as long as the material sealed by the gasket does not corrode the gasket.

[0019] Further, the joint, the protrusion and the gasket are integrally formed.

[0020] Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

[0021] The wave-tooth gasket has simple structure, when the upstream flange and the downstream flange are fixedly connected by bolts, the gasket located in the wave-tooth gasket is compressed, the upper surface and the lower surface of the gasket are respectively provided with concentric ring parts, thereby forming annular grooves on the upper surface and the lower surface, so that the upstream sealing cavity and the downstream sealing cavity can be respectively formed, and then the high-pressure gas / liquid is sequentially passed through the inner flow channel, the sealing cavity connection channel and the sealing cavity to form a high-pressure area in the sealing cavity. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the wave-tooth gasket in the prior art;

[0023] Figure 2 is the wave-tooth gasket shown in the utility model, which shows the surface of the wave-tooth gasket facing the upstream material;

[0024] Figure 3 is a sectional view of the gasket sealing device.

[0025] In the drawings:

[0026] 1: upstream flange; 2: downstream flange; 4: wave tooth; 5: wave-tooth gasket, gasket body

[0027] 6: joint; 7: protrusion; 8: inner flow channel; 9: sealing cavity connection channel; 10: sealing cavity, annular groove;

[0028] 13: upstream outer sealing gasket; 14: downstream outer sealing gasket; 15: upstream inner sealing gasket;

[0029] 16: downstream inner sealing gasket; 17: upstream sealing cavity; 18: downstream sealing cavity; 19: bolt DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme, beneficial effect and significant progress of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model is described clearly and completely below by combining with the drawings provided in the utility model examples, obviously, all the described embodiments are only some of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of protection of the utility model.

[0031] In the description of the present application, unless otherwise explicitly specified and limited, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" means two or more than two; unless otherwise specified or explained, the terms "connection", "fixation" and the like should be broadly understood, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] As shown in Figure 2 and Figure 3 A barrier gasket sealing device, comprising an upstream flange 1, a downstream flange 2 and a wave tooth gasket. The inner wall of the upstream flange 1 and the downstream flange 2 is not provided with a flange groove, the upstream flange 1 and the downstream flange 2 are fixedly connected by a plurality of fastening bolts 19 penetrating the upstream flange 1 and the downstream flange 2, and the surfaces of the upstream flange 1 and the downstream flange 2 facing each other are used to accommodate the wave tooth gasket.

[0033] The wave tooth gasket comprises a gasket body 5 and three protrusions 7, which are circumferentially arranged on the outer wall of the gasket body. One end of the protrusion 7 is fixedly connected with the outer surface of the gasket body 5, and the other end of the protrusion 7 is fixedly provided with a connector 6, the connector 6 is communicated with the high-pressure liquid or high-pressure gas conveying pipeline or the pressure tank storing high-pressure liquid or high-pressure gas through a pipeline, and the connector protrudes from the outer edge of the upstream flange 1 and the downstream flange 2. An inner flow channel 8 is formed in the connector 6, the protrusion 7 and part of the gasket body 5. One end of the inner flow channel 8 is located at the end of the connector 6 for connecting high-pressure liquid or high-pressure gas, and the other end is located in the wave tooth gasket and connected with a sealing cavity connecting channel 9. The sealing cavity connecting channel 9 is arranged along the thickness direction of the wave tooth gasket and penetrates through the thickness direction of the gasket, and the cross section of the sealing cavity connecting channel 9 is oval.

[0034] The gasket body 5 is a ring-shaped gasket, and is made of stainless steel. The upper and lower surfaces of the gasket body 5 are provided with corrugations. The upper surface of the gasket body 5 (i.e. facing the upstream direction of the material) is provided with an upstream outer sealing gasket 13 and an upstream inner sealing gasket 15. The upstream outer sealing gasket 13 and the upstream inner sealing gasket 15 are concentrically fixed on the upper surface of the gasket body 5, and are made of graphite or polytetrafluoroethylene. The upstream outer sealing gasket 13 and the upstream inner sealing gasket 15 are spaced apart from each other, so that an annular groove 10 is formed between the opposite side walls of the upstream outer sealing gasket 13 and the upstream inner sealing gasket 15. The depth of the annular groove 10 is equal to the thickness of the upstream outer sealing gasket 13 and the upstream inner sealing gasket 15, so that a sealing cavity is formed inside the annular groove 10 when the upstream flange and the downstream flange approach the annular groove.

[0035] Similarly, the lower surface of the gasket body 5 (i.e. facing the downstream direction of the material) is provided with a downstream outer sealing gasket 14 and a downstream inner sealing gasket 16. The downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 are concentrically fixed on the lower surface of the gasket body 5, and are made of graphite or polytetrafluoroethylene. The downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 are spaced apart from each other, so that an annular groove 10 is formed between the opposite side walls of the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16. The depth of the annular groove 10 is equal to the thickness of the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16, so that a sealing cavity is formed inside the annular groove 10 when the upstream flange and the downstream flange approach the annular groove.

[0036] The upstream outer sealing gasket 13, the upstream inner sealing gasket 15, the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 are in contact with the corrugations on the upper / lower surface of the gasket body 5. The spacing between the upstream outer sealing gasket 13 and the upstream inner sealing gasket 15 is 1 mm, and the spacing between the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 is 1 mm.

[0037] Furthermore, the two ends of the sealing cavity connecting channel 9 are located in the annular groove 10.

[0038] As Figure 3As shown, when the upstream flange 1 and the downstream flange 2 are tightened by the bolt 19, the upstream flange 1 and the downstream flange 2 press the upstream outer sealing gasket 13, the upstream inner sealing gasket 15, the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 on the outer surface of the gasket body 5; at this time, the part of the inner wall of the upstream flange 1, the upstream outer sealing gasket 13 and the upstream inner sealing gasket 15 form the upstream sealing cavity 17, and the part of the inner wall of the downstream flange 2, the downstream outer sealing gasket 14 and the downstream inner sealing gasket 16 form the downstream sealing cavity 18, thereby forming a sealing effect.

[0039] Due to the presence of the annular groove 10, the two ends of the gasket body in the thickness direction are spaced apart from the bottom wall of the upstream flange or the downstream flange by a certain space for accommodating the high-pressure liquid or high-pressure gas flowing through the inner flow channel 8 and the sealing cavity connecting channel 9.

[0040] The material of the gasket body 5 is not limited herein and can be selected from carbon steel, 304 stainless steel, 316 stainless steel, etc.

[0041] Moreover, the wave-tooth gasket does not need to be provided with an exhaust port on the sealing gasket structure, and when the high-pressure liquid or gas flows from one of the joints of the sealing gasket structure into the inner flow channel 8 of the protrusion and then into the corresponding sealing cavity connecting channel 9 and then into the upstream sealing cavity 17 and the downstream sealing cavity 18, respectively, the air in the sealing cavities can be pressed into the sealing cavity connecting channels 9 that do not flow into high-pressure gas or liquid and then discharged to the outside through the inner flow channel 8.

[0042] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and the skilled person should understand the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by the skilled person.

Claims

1. A wave gasket, characterized by, The gasket body (5) and at least one lug (7) are included, one end of the lug (7) extends radially from the side wall of the gasket body (5), the other end of the lug (7) is fixedly provided with a connector (6), the connector (6) is used for accessing high-pressure liquid or high-pressure gas; the connector (6), the lug (7) and part of the gasket body (5) are internally provided with an internal flow channel (8); A through sealing cavity connecting channel (9) is opened along the thickness direction of the gasket, and the end of the internal flow channel (8) is through with the sealing cavity connecting channel (9); And the upper and lower surfaces of the gasket body (5) are fixedly provided with at least two annular gaskets, the two annular gaskets on the same surface are concentrically arranged and a certain distance apart, so that the gasket body (5), the two annular gaskets form an annular groove (10); and the end of the sealing cavity connecting channel (9) is located at the annular groove (10); And the hardness of the annular gasket is less than the hardness of the upstream flange / downstream flange.

2. The wave gasket of claim 1, wherein, The material of the annular gasket is graphite or polytetrafluoroethylene.

3. The wave gasket of claim 1, wherein, The internal flow channel (8) and the sealing cavity connecting channel (9) are vertically arranged.

4. The wave gasket of claim 1, wherein, The lugs (7) are arranged at a certain angle around the center of the wave tooth gasket.

5. The wave gasket of claim 1, wherein, The number of the lugs (7) is more than 2, and the lugs are uniformly arranged around the circumference of the wave tooth gasket.

6. The wave gasket of claim 1, wherein, The material of the gasket body (5) is selected from one of the following materials: carbon steel, 304 stainless steel and 316 stainless steel.

7. A barrier gasket sealing device characterized by, The upstream flange (1), the downstream flange (2) and the wave tooth gasket according to claim 1 are included, the wave tooth gasket is clamped between the upstream flange (1) and the downstream flange (2); and part of the inner wall of the upstream flange (1) and the two annular gaskets of the wave tooth gasket facing the upstream material form an upstream sealing cavity (17), part of the inner wall of the downstream flange (2) and the two annular gaskets of the wave tooth gasket facing the downstream material form a downstream sealing cavity (18); The two ends of the sealing cavity connecting channel (9) are respectively communicated with the upstream sealing cavity (17) and the downstream sealing cavity (18); and the high-pressure liquid or high-pressure gas from the outside flows through the internal flow channel (8), the sealing cavity connecting channel (9) and then flows into the upstream sealing cavity (17) and the downstream sealing cavity (18).

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