CN219493398U - Leakage-proof device for natural gas pipeline - Google Patents

Abstract

The utility model discloses a natural gas pipeline leakage prevention device, wherein a leakage prevention component comprises a sealing ring, extruding rings symmetrically and integrally extend from the front side to the back side of the sealing ring, the extruding rings are oppositely arranged, the top of the sealing ring is fixedly connected with a rubber sleeve ring, the surface of the extruding ring is an arc-shaped surface from inside to outside, an outwards opened port of the extruding ring is a unilateral layer, the upper end of an inner cavity of the extruding ring is a vertical surface, and the lower end of the inner cavity of the extruding ring is a semicircular surface. The leakage-proof device for the natural gas pipeline solves the problem that the sealing gasket is plastically deformed and is not good enough in leakage-proof effect because the sealing gasket always has a joint with the pipeline, so that natural gas which is corroded, high-pressure and vibrated in the conveying process is easy to enter from the joint, and the sealing gasket is easy to corrode and age.

Description

Leakage-proof device for natural gas pipeline

Technical Field

The utility model relates to the technical field of pipeline leakage prevention, in particular to a natural gas pipeline leakage prevention device.

Background

The natural gas pipeline is mainly used for conveying natural gas, the natural gas pipeline is formed by connecting a section of pipeline in the construction process, the flange connection is the main mode of the connection of the natural gas pipeline and equipment, the leakage of the flange connection is one of the main modes of the leakage of the natural gas station, the flange seal mainly depends on the pretightening force generated by the connecting bolts of the flange connection, the gasket is used for achieving enough working sealing specific pressure to prevent the leakage of the natural gas, for the natural gas pipeline, the natural gas pipeline can be prevented from leaking at one time due to the characteristics of corrosion, high pressure, vibration and the like of a conveying medium, the leakage caused by the flange seal failure of the natural gas pipeline is mainly caused by the corrosion of the natural gas, the sealing gasket is used for a long time, plastic deformation, elastic force is generated, the ageing of gasket materials and the like, and the leakage is caused by the fact that the sealing gasket is used for preventing the leakage of the sealing gasket, for example, the patent application number CN202221353945.8 is specifically, the leakage preventing device for the installation of the natural gas pipeline, the leakage preventing device is characterized in that the leakage preventing the natural gas pipeline is realized by arranging the first corrosion-resistant sealing gasket, the second corrosion-resistant sealing gasket and the third corrosion-resistant sealing gasket on the air inlet pipe, and the connecting sleeve, and the leakage preventing main body are provided with the mutual sealing blocks, and the leakage preventing screw can be well prevented from leaking due to the mutual sealing.

For example, the patent application number CN202122763543.7, specifically, is a leakage preventing device for a natural gas pipeline, and the structure of the leakage preventing device is perpendicular to the seam of the sealing block through the seam of the sealing gasket, so that the leakage preventing effect can be improved, and the leakage preventing device is easy to install and detach.

However, in the sealing gaskets in the above-mentioned patents CN202221353945.8 and CN202122763543.7, a joint seam is always formed between the sealing gasket and the pipeline when sealing, so that natural gas having corrosion, high pressure and vibration generated in the conveying process is easy to enter from the joint seam, and corrosion and aging of the sealing gasket are easy to cause, so that the sealing gasket is plastically deformed, and the leakage-proof effect is not good enough.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the leakage-proof device for the natural gas pipeline, which solves the problems that a joint seam exists between a sealing gasket and the pipeline all the time, so that natural gas which is corroded, high-pressure and vibrates in the conveying process easily enters from the joint seam, and the sealing gasket is easy to corrode and age, so that the sealing gasket is plastically deformed, and the leakage-proof effect is not good enough.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the natural gas pipeline leakage-preventing device comprises a natural gas pipeline, wherein one end of the natural gas pipeline is provided with a connecting flange, and the surface of the connecting flange is provided with a leakage-preventing assembly.

The anti-leakage assembly comprises a sealing ring, wherein the front and back sides of the sealing ring are symmetrically integrally extended with extrusion rings, the extrusion rings are oppositely arranged, the top of the sealing ring is fixedly connected with a rubber sleeve ring, the surface of the extrusion ring is an arc-shaped surface from inside to outside, an outwards-opened port of the extrusion ring is a unilateral layer, the upper end of an inner cavity of the extrusion ring is a vertical surface, and the lower end of the inner cavity of the extrusion ring is a semicircular surface.

Preferably, R of the semicircular surface is 3-6.

Preferably, L1 outside the extrusion ring is 3-7mm.

Preferably, L2 in the extrusion ring is 2-5.

Preferably, the sealing ring is attached to the surface of the connecting flange, and the extrusion rings are respectively positioned on the inner wall of the natural gas pipeline and the top of the connecting flange.

Preferably, the sealing ring is movably sleeved on the surface of the connecting flange, and the side face is attached to the surface of the connecting flange.

Advantageous effects

The utility model provides a natural gas pipeline leakage prevention device. Compared with the prior art, the method has the following beneficial effects:

1. this natural gas pipeline leak protection device, through when flange joint, install leak protection subassembly, along with locking the bolt on flange surface, along with the bolt tightening its flange can fasten each other, can extrude on semicircle face, because the arcwall face on extrusion circle surface, consequently after the extrusion, its extrusion circle can outwards crooked, and through inside and outside perpendicular respectively tightly laminating at flange's top and natural gas pipeline connector inner wall, accomplish the sealing of inside and outside junction, and natural gas pipeline connector covers the junction through the extrusion circle, and the slope of arcwall face can reduce the gap resistance that natural gas was carried, unilateral layer reduces the gap of laminating simultaneously, make natural gas directly flow away along with the arcwall face, reduce that natural gas gets into along unilateral layer and natural gas pipeline inner wall contact gap, avoid getting into the corruption and ageing of adding the piece sealing pad from the gap, make sealing pad plastic deformation, therefore, the leakproofness has been improved.

2. According to the leakage-proof device for the natural gas pipeline, the sealing ring and the extrusion ring are wrapped on the surface of the connecting flange through the last rubber sleeve ring, and the leakage-proof device is used for protecting the sealing ring and the extrusion ring.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a natural gas pipeline in accordance with the present utility model;

FIG. 3 is a schematic view of a leak-proof assembly of the present utility model;

FIG. 4 is a partial cross-sectional view of a leak-proof assembly of the present utility model;

FIG. 5 is a schematic view of a squeeze ring of the present utility model;

FIG. 6 is a schematic illustration of the dimensions of the extrusion ring of the present utility model.

In the figure: 1. a natural gas pipeline; 11. a connecting flange; 2. a leak prevention assembly; 21. a seal ring; 22. a rubber collar; 24. a pressing ring; 241. an arc surface; 242. a vertical plane; 243. a semicircular surface; 244. and a single-side layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present utility model provides a technical solution: the natural gas pipeline leakage-preventing device comprises a natural gas pipeline 1, wherein a connecting flange 11 is arranged at one end of the natural gas pipeline 1, and a leakage-preventing assembly 2 is arranged on the surface of the connecting flange 11.

Referring to fig. 3-5, the anti-leakage component 2 includes a sealing ring 21, the sealing ring 21 is attached to the surface of the connecting flange 11, the extruding ring 24 is respectively located on the inner wall of the natural gas pipeline 1 and the top of the connecting flange 11, the sealing ring 21 is movably sleeved on the surface of the connecting flange 11, and the side faces are attached to the surface of the connecting flange 11, the extruding rings 24 are integrally extended on the front and back sides of the sealing ring 21, wherein each face of the extruding ring 24 which is symmetrically arranged on the front and back sides of the sealing ring 21 is two and is located in the middle of the sealing ring 21 and at the edge of the sealing ring 21, and the extruding rings 24 which are arranged on each face are oppositely arranged, so that the extruding rings 24 are used for covering the joint of the natural gas pipeline 1 and the connecting flange 11, the rubber collar 22 is fixedly connected to the top of the sealing ring 21, the surface of the extruding ring 24 is an arc-shaped face 241 from inside to outside, the outwards open port of the extruding ring 24 is a single-sided layer 244, the upper end of the inner cavity of the extruding ring 24 is a vertical plane 242, the lower end of the inner cavity of the extruding ring 24 is a semicircular face 243, and the inner and outer extruding ring 24 which extends through the sealing ring 21 is respectively covered on the connecting port of the natural gas pipeline 1 and the top of the connecting flange 11, thereby improving the sealing performance.

Referring to fig. 6, the semicircular surface 243 has an R of 3-6, an L1 outside the pressing ring 24 of 3-7mm, an L2 inside the pressing ring 24 of 2-5, and an L2 inside the pressing ring 24 smaller than an L1 outside.

During operation, the rubber collar 22 in the anti-leakage component 2 is sleeved on the connecting flange 11 of the natural gas pipeline 1 firstly, the sealing ring 21 is attached to the surface of the connecting flange 11, meanwhile, the extruding ring 24 is sleeved on the port corresponding to the natural gas pipeline 1 and the top of the connecting flange 11 respectively, then the connecting flange 11 of the other end natural gas pipeline 1 is sleeved into the inner cavity of the rubber collar 22 on the other side, the connecting flange 11 on the other side is extruded into the inner cavity of the extruding ring 24 and contacts with the surface of the semicircular surface 243, then the connecting flange 11 is tightly locked by the locking bolts on the surface of the connecting flange 11, the semicircular surface 243 on the surface of the inner extruding ring 24 is extruded with the connecting flange 11 along with the tightening of the bolts, and the inner and outer extruding rings 24 are outwards bent due to the arc-shaped surface 241 on the surface of the extruding ring 24, and the inner and outer extruding rings 24 are respectively attached to the top of the connecting flange 11 and the inner wall of the natural gas pipeline 1 tightly, the sealing joint between the inner and the outer vertical surfaces 242 is completed, the connecting port of the natural gas pipeline 1 is covered by the extruding ring 24, the arc-shaped surface 241 can reduce the inclination of the arc-shaped surface, the gap conveying gap layer 244 can be reduced, and the resistance of the sealing ring can be directly prevented from entering the sealing ring 21 along with the sealing ring 24, and the sealing ring 24 can be prevented from being directly deformed along with the welding the surface of the sealing ring, and the sealing ring 21, and the sealing ring is prevented from being directly entering into the sealing ring 21, and the sealing ring, and the sealing pad is prevented from being deformed along with the sealing pad surface, and the sealing pad surface.

And all that is not described in detail in this specification is well known to those skilled in the art.

Claims (6)

1. The utility model provides a natural gas line leak protection device, includes natural gas line (1), the one end of natural gas line (1) is provided with flange (11), its characterized in that: the surface of the connecting flange (11) is provided with a leakage-proof assembly (2);

the anti-leakage assembly (2) comprises a sealing ring (21), wherein the extruding ring (24) is integrally extended on the front side and the back side of the sealing ring (21), the extruding ring (24) is oppositely arranged, the top of the sealing ring (21) is fixedly connected with a rubber sleeve ring (22), the surface of the extruding ring (24) is an arc-shaped surface (241) from inside to outside, an outwards-opened port of the extruding ring (24) is a unilateral layer (244), the upper end of an inner cavity of the extruding ring (24) is a vertical surface (242), and the lower end of the inner cavity of the extruding ring (24) is a semicircular surface (243).

2. The natural gas pipeline leakage prevention device according to claim 1, wherein: r of the semicircular surface (243) is 3-6mm.

3. The natural gas pipeline leakage prevention device according to claim 1, wherein: the L1 outside the extrusion ring (24) is 3-7mm.

4. A natural gas pipeline leakage prevention apparatus according to claim 3, wherein: the L2 inside the extrusion ring (24) is 2-5mm.

5. The natural gas pipeline leakage prevention device according to claim 1, wherein: the sealing ring (21) is attached to the surface of the connecting flange (11), and the extrusion ring (24) is respectively positioned on the inner wall of the natural gas pipeline (1) and the top of the connecting flange (11).

6. The natural gas pipeline leakage prevention device according to claim 5, wherein: the sealing ring (21) is movably sleeved on the surface of the connecting flange (11), and the side face of the sealing ring is attached to the surface of the connecting flange (11).