Sealing gasket structure and blocking type gasket sealing device thereof

Abstract

The sealing gasket structure comprises an upstream flange, a downstream flange, an inner flow channel and the sealing gasket structure, the sealing gasket structure comprises a gasket and at least one protruding block, one end of the protruding block extends from the side wall of the gasket in the radial direction of the gasket, the other end of the protruding block is fixedly provided with a connector, and the connector is fixedly connected with the inner flow channel through the inner flow channel. 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 in the protruding block is communicated with the sealing cavity connecting channel. Annular flange grooves are formed in the opposite surfaces of the upstream flange and the downstream flange, and sealing gasket structures are arranged in the annular flange grooves; the upper / lower surface of at least part of the gasket can abut against the inclined faces of the flange grooves of the upstream flange and the downstream flange, the distance between the upper / lower surface of part of the gasket and the bottom faces of the flange grooves is a certain distance, and therefore an upstream flange sealing cavity and a downstream flange sealing cavity are formed between the flange grooves and the gasket.

Description

TECHNICAL FIELD

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

[0002] The gasket sealing of prior art adopts octagonal gasket or oval gasket to be arranged between upstream flange and downstream flange to isolate material leakage. As shown in the drawings, the flanges on both sides of the gasket clamp the gasket, and the sealing effect of the gasket and the flange prevents the internal material of the pipeline from leaking into the atmosphere. Figure 1a 、 1b However, due to the high pressure of the material in the pipeline, the material is easy to leak out from the contact surface between the gasket and the flange surface, polluting the air or causing explosion or fire hazards.

[0003] CN108775459B discloses a gasket sealing device and method for blocking material leakage with high-pressure liquid or gas, which uses sealing liquid or sealing gas with higher pressure than the material and the atmosphere to isolate the material with lower pressure and the atmosphere, thereby achieving the purpose of zero material leakage. In the gasket sealing device, an annular sealing gasket structure for blocking volatile gas material leakage with high-pressure liquid or high-pressure gas is arranged between the connected part of the upstream flange and the downstream flange, and the sealing gasket structure is respectively provided with a gas inlet or liquid inlet of a delivery pipe for connecting an external high-pressure liquid or high-pressure gas source and a gas outlet for gas discharge. The sealing device uses sealing liquid or sealing gas with higher pressure than the process pressure to isolate the material and the atmosphere, but since the sealing part is surrounded by the flange bolts, additional transition connecting accessories are needed to make the sealing liquid or sealing gas smoothly enter the sealing cavities on both sides of the gasket, so the structure is relatively complex and the gasket size is large. UTILITY MODEL CONTENTS

[0004] The utility model discloses a sealing gasket structure and barrier type gasket sealing device, the gasket sealing device structure is simple, when using bolt fixed connection upstream flange and downstream flange, the flange is pressed tightly in the gasket in, forms upstream flange sealing cavity and downstream flange sealing cavity respectively, then utilizes the channel and enters the sealing cavity and forms high pressure area with high pressure gas / liquid through inner flow channel, sealing cavity connection channel in proper order.

[0005] The utility model discloses a sealing gasket structure and barrier type gasket sealing device, the gasket sealing device structure is simple, when using bolt fixed connection upstream flange and downstream flange, the flange is pressed tightly in the gasket in, forms upstream flange sealing cavity and downstream flange sealing cavity respectively, then utilizes the channel and enters the sealing cavity and forms high pressure area with high pressure gas / liquid through inner flow channel, sealing cavity connection channel in proper order.

[0006] A sealing gasket structure comprises a gasket and at least one protrusion, one end of the protrusion extending radially from the sidewall of the gasket, the other end of the protrusion being fixedly provided with a connector, the connector being used for connecting to high-pressure liquid or high-pressure gas; the connector, the protrusion and part of the gasket are internally provided with an internal flow channel;

[0007] A through sealing cavity connecting channel is formed along the thickness direction of the gasket, and the end of the internal flow channel is communicated with the through sealing cavity connecting channel.

[0008] Further, the internal flow channel and the sealing cavity connecting channel are arranged perpendicularly.

[0009] Further, the cross section of the sealing gasket structure is octagonal or elliptical.

[0010] A barrier gasket sealing device comprises an upstream flange, a downstream flange, an internal flow channel and the sealing gasket structure, the facing surfaces of the upstream flange and the downstream flange are both provided with a corresponding annular flange groove, and the sealing gasket structure is arranged in the flange groove of the upstream flange and the downstream flange; the cross section of the flange groove is tapered inwardly from the facing surfaces, comprising two facing inclined surfaces and a bottom surface.

[0011] At least part of the upper / lower surface of the sealing gasket structure can abut against the inclined surfaces of the flange groove of the upstream flange and the downstream flange, and the upper / lower surface of the gasket is at a certain distance from the bottom surface of the flange groove, so that the flange groove of the upstream flange and the gasket form an upstream flange sealing cavity, and the downstream flange and the gasket form a downstream flange sealing cavity.

[0012] The two ends of the sealing cavity connecting channel are respectively communicated with the upstream flange sealing cavity and the downstream flange sealing cavity.

[0013] Further, the cross section of the flange groove is trapezoidal tapered inwardly from the facing surfaces of the upstream flange and the downstream flange.

[0014] Further, the connector 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.

[0015] Preferably, the number of protrusions is more than 2, and the protrusions are uniformly arranged circumferentially around the gasket.

[0016] The high-pressure liquid or gas from the outside of the energy storage tank flows into the upstream flange sealing cavity and the downstream flange sealing cavity in sequence through the internal flow channel and the sealing cavity connecting channel, so that high-pressure zones are formed in the upstream flange sealing cavity and the downstream flange sealing cavity.

[0017] Further, the gasket material 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.

[0018] Further, the joint, the protrusion and the gasket are integrally formed.

[0019] Preferably, the number of sealing cavity connection channels is one or more, as long as the end of the sealing cavity connection channel can be located in the upstream flange sealing cavity and the downstream flange sealing cavity.

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

[0021] The barrier type gasket sealing device has a simple structure. When the bolts are used to fixedly connect the upstream flange and the downstream flange, the flanges press the gaskets located therein, and the upstream flange sealing cavity and the downstream flange sealing cavity are formed, respectively. Then, the channel is used to sequentially pass the high-pressure gas / liquid through the inner flow channel, the sealing cavity connection channel and into the sealing cavity to form a high-pressure area. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1a is a structural schematic view of the gasket sealing device in the prior art using an octagonal gasket; Figure 1b is a structural schematic view of the gasket sealing device in the prior art using an oval gasket;

[0023] Figure 2a is a sectional view of the gasket sealing device shown in Embodiment 1, wherein the gasket adopts an octagonal gasket structure; Figure 2b is a sectional view of the gasket sealing device shown in Embodiment 2, wherein the gasket adopts an oval gasket structure;

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

[0025] In the drawings:

[0026] 1: upstream flange; 2: downstream flange; 3: octagonal gasket; 4: oval gasket; 5: joint;

[0027] 6: protrusion; 7: inner flow channel; 8: outer sealing surface of upstream flange; 9: outer sealing surface of downstream flange;

[0028] 10: inner sealing surface of upstream flange; 11: inner sealing surface of downstream flange; 12: upstream flange sealing cavity;

[0029] 13: downstream flange sealing cavity; 14: sealing cavity connection channel; 15: bolt; 16: gasket framework;

[0030] 161: outer side wall; 162: inner side wall; 163: beveled side wall; 164: left side wall; 165: right side wall. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme, beneficial effects 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 in the following by combining with the drawings provided in the utility model examples. Obviously, all the described embodiments are only part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] 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 understood broadly, 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.

[0033] Embodiment 1

[0034] As shown in Figure 2a and Figure 3 , a barrier gasket sealing device, comprising an upstream flange 1, a downstream flange 2 and a sealing gasket structure, the upstream flange 1 and the downstream flange 2 are fixedly connected by a plurality of fastening bolts 15 penetrating the upstream flange 1 and the downstream flange 2, the surfaces of the upstream flange 1 and the downstream flange 2 facing each other are used to accommodate the sealing gasket structure.

[0035] As shown in Figure 3 , the sealing gasket structure comprises an annular gasket 16 and three lugs 6, the gasket 16 is made of metal or non-metal material, one end of the lug extends radially from the side wall of the gasket, the other end of the lug 6 is fixedly provided with a connector 5, the connector 5 is used to communicate 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, and the connector protrudes from the outer edge of the upstream flange 1 and the downstream flange 2; and an inner flow channel 7 is opened in the connector 5, the lug 6 and part of the gasket, one end of the inner flow channel 7 is located at the end of the connector 5 for connecting the sealing liquid or sealing gas, and the other end is located in the inner part of the sealing gasket structure and connected with the sealing cavity connection channel 14.

[0036] The gasket is internally extended into the inner flow channel 7 and is provided with a sealing cavity connecting channel 14 perpendicular to the inner flow channel 7, which is arranged along the thickness direction of the gasket 16 and penetrates the thickness direction of the gasket, and the cross section of the sealing cavity connecting channel 14 is oval.

[0037] The facing surfaces of the upstream flange 1 and the downstream flange 2 are provided with annular flange grooves, the cross section of the flange groove is trapezoidal which is tapered inward from the facing surfaces, the inclined surface in the flange groove of the upstream flange is the outer layer sealing surface 8 and the inner layer sealing surface 10 of the upstream flange, and the inclined surface in the flange groove of the downstream flange is the outer layer sealing surface 9 and the inner layer sealing surface 11 of the downstream flange. Moreover, the positions of the flange grooves of the upstream flange 1 and the downstream flange 2 correspond, so that the octagonal sealing gasket structure is placed in the opposite flange grooves of the fixed upstream flange 1 and the downstream flange 2. The barrier type gasket sealing device does not need to be provided with an exhaust port on the sealing gasket structure, when the high pressure liquid or gas flows into the inner flow channel of the protrusion 6 from one of the joints 5 of the sealing gasket structure, enters the corresponding sealing cavity connecting channel 14, and then enters the upstream flange sealing cavity 12 and the downstream flange sealing cavity 13 respectively; at this time, the air in the sealing cavity can be pressed into the sealing cavity connecting channel 14 which does not flow into the high pressure gas or liquid and is discharged to the outside through the inner flow channel 7.

[0038] The gasket 16 is an octagonal annular gasket, which includes an outer side wall 161, an inner side wall 162, a left side wall 164, a right side wall 165 and four remaining oblique side walls 163 arranged at an angle along the radial direction of the gasket 16. The two oblique side walls 163 and the left side wall 164 form a tapered first convex ring part, and the two oblique side walls 163 and the right side wall 165 form a tapered second convex ring part. When the bolts are tightened to the upstream flange and the downstream flange, the upstream flange and the downstream flange are pressed to the first convex ring part and the second convex ring part, so that the two oblique side walls 163 of the first convex ring part are in surface contact with the outer layer sealing surface 8 and the inner layer sealing surface 10 of the flange groove of the upstream flange 1 but not in contact with the inner bottom wall of the flange groove, and the two oblique side walls 163 of the second convex ring part are in surface contact with the outer layer sealing surface 9 and the inner layer sealing surface 11 of the flange groove of the downstream flange 2 but not in contact with the inner bottom wall of the flange groove, thereby forming a sealing effect. The space between the first convex ring part and the flange groove of the upstream flange 1 is the upstream flange sealing cavity 12 for containing the high pressure liquid or high pressure gas flowing through the inner flow channel 7 and the sealing cavity connecting channel 14, and the space between the second convex ring part and the flange groove of the downstream flange 2 is the downstream flange sealing cavity 13 also for containing the high pressure liquid or high pressure gas flowing through the inner flow channel 7 and the sealing cavity connecting channel 14.

[0039] The material of the gasket 16 is not limited herein and can be selected from carbon steel, 304 stainless steel, 316 stainless steel, etc.

[0040] Embodiment 2

[0041] As Figure 2b and Figure 3 A barrier gasket sealing device is shown, which has the same principle as that of embodiment 1 and has a basically same structure. The same content will not be described again. Only the different features will be described below.

[0042] The joint 5, the protrusion 6 and the sealing gasket structure are integrally formed.

[0043] Moreover, the gasket 16 of the sealing gasket structure is an oval gasket, which is arranged between the upstream flange and the downstream flange.

[0044] In use, when the bolts are tightened to the upstream flange and the downstream flange, the upstream flange and the downstream flange are pressed to the gasket 16 and the flange groove bevel of the upstream flange and the downstream flange, forming a surface contact, thereby forming a sealing effect. Moreover, the two ends of the gasket thickness direction are spaced apart from the inner bottom wall of the flange groove by a certain space, which is used to accommodate the high-pressure liquid or high-pressure gas flowing in through the inner flow channel 7 and the sealing cavity connecting channel 14.

[0045] 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. The description of the specification is only for the sake of clarity, and the skilled person should understand the specification as a whole. The technical solutions in the embodiments can also be combined appropriately to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gasket structure, characterized by, The sealing gasket structure comprises a gasket and at least one lug (6) extending radially from the side wall of the gasket at one end, and a connector (5) fixed at the other end of the lug (6), which is used to connect to high-pressure liquid or high-pressure gas; an inner flow channel (7) is formed in the connector (5), the lug (6) and part of the gasket. A through sealing cavity connecting channel (14) is formed in the thickness direction of the gasket, and the end of the inner flow channel (7) in the lug (6) is connected to the through sealing cavity connecting channel (14).

2. The gasket structure of claim 1 wherein, The inner flow channel (7) and the sealing cavity connecting channel (14) are arranged vertically.

3. The gasket structure of claim 1 wherein, The cross section of the sealing gasket structure is octagonal or elliptical.

4. A barrier gasket sealing device characterized by, The sealing gasket structure comprises an upstream flange (1), a downstream flange (2) and the sealing gasket structure according to claim 1, the surfaces of the upstream flange (1) and the downstream flange (2) facing each other are provided with annular flange grooves corresponding in position, and the flange grooves of the upstream flange (1) and the downstream flange (2) are provided with the sealing gasket structure; the cross section of the flange groove is tapered inward from the surfaces facing each other, comprising two opposite inclined surfaces and a bottom surface; The upper / lower surfaces of at least part of the gasket (16) of the sealing gasket structure can abut against the inclined surfaces of the flange grooves of the upstream flange (1) and the downstream flange (2), and the upper / lower surfaces of part of the gasket (16) are at a certain distance from the bottom surface of the flange groove, so that the flange groove of the upstream flange (1) and the gasket (16) form an upstream flange sealing cavity (12), and the downstream flange and the gasket (16) form a downstream flange sealing cavity (13); The two ends of the sealing cavity connecting channel (14) are connected to the upstream flange sealing cavity (12) and the downstream flange sealing cavity (13) respectively.

5. The barrier gasket sealing device of claim 4, wherein, The cross section of the flange groove is trapezoidal tapered inward from the surfaces of the upstream flange (1) and the downstream flange (2) facing each other.

6. The barrier gasket sealing device of claim 4, wherein, The connector (5) is connected to 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.

7. The barrier gasket sealing device of claim 6, wherein, The number of lugs (6) is more than two, and the lugs (6) are arranged uniformly in the circumferential direction around the gasket.

8. The barrier gasket sealing device of claim 4, wherein, The material of the gasket (16) is selected from one of the following materials: carbon steel, 304 stainless steel and 316 stainless steel.

9. The barrier gasket sealing device of claim 4, wherein, The connector (5), the lug (6) and the gasket (16) are integrally formed.

Images