Leak-proof gas pipeline

Abstract

The utility model relates to a leakage-proof gas pipeline which comprises flanges fixedly connected to the connecting ends of gas pipelines, and the adjacent gas pipelines are fixedly connected through the flanges. A sealing groove extending around the gas pipeline is formed in the side, away from the connecting end, of the flange, and a sealing ring extending in the extending direction of the sealing groove and sliding in the axial direction of the gas pipeline is arranged in the seam sealing groove. The side, facing the connecting end, of the seam sealing groove communicates with the connecting end of the flange through a sliding hole. A piston sliding in the axial direction of the sliding hole is arranged in the sliding hole and connected with the sealing ring. The outer side of the flange is sleeved with a protective cover matched with the flange, and the side, away from the connecting end, of the sealing ring is attached to the protective cover. Pressure in the gas pipeline is converted into thrust to the sealing ring through the piston, the sealing performance of the device is improved through the pressure in the gas pipeline, leakage of the gas pipeline is prevented, and the device is simple, efficient, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pipeline technical field especially relates to a kind of anti-leakage gas pipelines. BACKGROUND

[0002] Gas pipeline refers to the gas transported by pipeline, divided into steel pipe, PE pipe etc., wherein gas is generally divided into natural gas, artificial gas etc.;Gas pipeline can be divided into long-distance gas pipeline, city gas pipeline and industrial enterprise gas pipeline according to use;According to laying mode, it can be divided into underground gas pipeline and overhead gas pipeline;According to gas pressure, it can also be classified and managed. The safe operation of these pipelines and facilities is crucial to ensure gas supply and residents' safety.

[0003] However, the connecting part of the gas pipeline will often leak gas due to aging and other reasons during long-term use, causing great harm to social safety. Therefore, a gas pipeline that prevents leakage is needed. INVENTION CONTENTS

[0004] The utility model provides a kind of push force to sealing ring by piston to the pressure in gas pipeline according to the deficiency of prior art, the sealing property of gas pipeline internal pressure increasing device is prevented from the leakage of gas pipeline, simple and efficient, safe and reliable, easy to operate Anti-leakage gas pipeline.

[0005] The utility model is realized through the following technical schemes, provide anti-leakage gas pipeline, including the flange of solid connection in the connecting end of gas pipeline, adjacent gas pipeline is solidly connected by flange;The side of flange away from the connecting end is equipped with the sealing groove extending around gas pipeline, and the sealing ring extending along the extension direction of sealing groove and sliding along the axial direction of gas pipeline is equipped in sealing groove;The side of sealing groove towards the connecting end is connected with the connecting end of flange by sliding hole;Sliding hole is equipped with piston sliding along the axial direction of sliding hole, and piston is connected with sealing ring;The protective cover that is compatible with flange is set on the outside of flange, and the side of sealing ring away from the connecting end is attached with the protective cover;The push force to sealing ring by piston to the pressure in gas pipeline, the sealing property of gas pipeline internal pressure increasing device is prevented from the leakage of gas pipeline.

[0006] As optimization, the protective cover includes oppositely arranged shell, and the side of shell towards gas pipeline is equipped with semicircular groove A compatible with gas pipeline, two semicircular grooves A are enclosed on gas pipeline, and two shells are solidly connected by fastening device;Semicircular groove is equipped with semicircular groove B compatible with flange;The relative arrangement of semicircular arc shell facilitates the installation and removal of protective cover.

[0007] As optimization, the semi-circular groove B is provided with a limiting groove extending around the gas pipeline, the limiting groove is matched with the sealing ring, and the limiting groove is located on the movement track of the sealing ring; the position of the two housings is limited by the limiting groove, and the sealing strength of the housing and the sealing ring is increased by the internal pressure of the gas pipeline.

[0008] As optimization, the two ends of the two housings are sealingly connected with the gas pipeline through the sealing devices A extending around the gas pipeline and the sealing devices B, the sealing devices A and the sealing devices B are connected, and the gas in the gas pipeline is prevented from leaking between the sealing devices A and the sealing devices B.

[0009] As optimization, the sealing device B comprises the sealing strips A and B arranged on the two housings and extending along the edges of the housings, the sealing strips A and B are matched, and the concave-convex structures matched with each other are arranged on the sealing strips A and B.

[0010] The utility model discloses the beneficial effects are: through piston, the pressure in the gas pipeline is converted into the thrust to the sealing ring, and the sealing strength of the housing and the sealing ring is increased by the internal pressure of the gas pipeline, and the leakage of the gas pipeline is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the utility model sectional view (front view);

[0012] Figure 2 It is the utility model sectional view (the angle of view from below);

[0013] In the drawing, it is shown that:

[0014] 1, gas pipeline, 2, flange, 3, sealing ring, 4, piston, 5, sealing gasket, 6, protective cover, 7, sealing ring, 8, fastening device, 9, sealing device A, 10, sealing device B, 601, housing, 602, limiting groove, 1001, sealing strip A, 1002, sealing strip B. DETAILED DESCRIPTION

[0015] In order to clearly illustrate the technical features of the scheme, the following through specific embodiment, the scheme is described.

[0016] For example, Figure 1 And Figure 2The utility model discloses a prevent the gas pipeline of leaking, including the flange 2 of solid connection in the connecting end of gas pipeline 1, the adjacent gas pipeline 1 is solid through the flange 2, the side of flange 2 away from the connecting end is equipped with the sealing groove that extends around gas pipeline 1, and the sealing ring 3 that is extended along sealing groove extension direction and along gas pipeline 1 axial sliding is equipped in the sealing groove, the side of sealing groove towards the connecting end is connected with the connecting end of flange 2 through sliding hole, and the piston 4 that is along sliding hole axial sliding is equipped in sliding hole, and the piston 4 is connected with sealing ring 3, the outside of flange 2 is equipped with the protective cover 6 of adaptation with flange 2, and the side of sealing ring 3 away from the connecting end and protective cover 6 is attached and is equipped.

[0017] The flange 2 and gas pipeline 1 coaxial solid connection, the flange 2 on adjacent gas pipeline 1 is solid through bolt and nut, and the sealing pad 5 that extends around gas pipeline 1 is equipped between the flange 2 of solid, the axis of sealing groove and the axis of gas pipeline 1 are same, and the sliding hole is arranged around gas pipeline 1 in turn and evenly, and the axis of sliding hole and the axis of gas pipeline 1 are parallel to each other.

[0018] Gas is transmitted in gas pipeline 1, if gas leaks from the connecting end of gas pipeline 1, the piston 4 in sliding hole slides in sliding hole towards the side away from the connecting end under the action of pressure in gas pipeline 1, and sealing ring 3 slides in sealing groove towards protective cover 6 under the drive of piston 4 and is closely attached with the inner surface of protective cover 6, and sealing ring 3 seals the inside of protective cover 6 under the action of pressure in gas pipeline 1 and prevents gas in gas pipeline 1 from leaking.

[0019] As Figure 1 And Figure 2 The protective cover 6 includes oppositely arranged shell 601, and the side of shell 601 towards gas pipeline 1 is provided with semicircular groove A that is adapted to gas pipeline 1, two semicircular grooves A are combined on gas pipeline 1, and the two shell 601 are solid through fastening device 8, and the semicircular groove B that is adapted to flange 2 is provided in semicircular groove, and the fastening device 8 is prior art, and bolt and nut fastening two shell 601 can be used, and the flange 2 is located in semicircular groove B, and the side of sealing ring 3 on two flanges 2 away from the connecting end is attached with the face of semicircular groove B two sides respectively.

[0020] Two shell 601 are oppositely arranged on the two sides of gas pipeline 1 respectively, and the semicircular groove A on two shell 601 is combined on gas pipeline 1, and two semicircular grooves B are combined on flange 2, and sealing ring 3 slides in sealing groove towards protective cover 6 under the drive of piston 4 and is closely attached with the face surface of semicircular groove B two sides in protective cover 6.

[0021] As Figure 1 And Figure 2The semi-circular groove B is provided with a limiting groove 602 extending around the gas pipeline 1, the limiting groove 602 is matched with the sealing ring 3, and the limiting groove 602 is located on the movement track of the sealing ring 3; the limiting groove 602 is a ring structure, and the axis of the limiting groove 602 is the same as the axis of the sealing ring 3; the limiting groove 602 is provided with a flexible sealing ring 7 extending along the extension direction of the limiting groove 602, and the flexible sealing ring 7 is matched with the sealing ring 3.

[0022] The sealing ring 3 is driven by the piston 4 to slide in the sealing groove and gradually enter the limiting groove 602, and the sealing ring 3 and the limiting groove 602 fasten the two housings 601 to prevent the two housings 601 from loosening relative to each other.

[0023] As shown in Figure 1 and Figure 2 The two ends of the two housings 601 are respectively sealed and connected with the gas pipeline 1 through the sealing device A9 extending around the gas pipeline 1, and the two housings 601 are sealed and connected through the sealing device B10, and the sealing device A9 and the sealing device B10 are connected; the sealing device A9 is a prior art, and a sealing tape can be used; the two housings 601 are respectively provided with grooves matched with the sealing device A9 and the sealing device B10.

[0024] The two housings 601 are respectively arranged on the two sides of the gas pipeline 1, the semi-circular grooves A on the two housings 601 enclose the gas pipeline 1, and the two housings 601 are sealed and connected with the gas pipeline 1 through the sealing device A9; the two housings 601 are sealed and connected through the sealing device B10, and the two housings 601 are fixed through the fastening device 8.

[0025] As shown in Figure 1 and Figure 2 The sealing device B10 includes sealing tapes A1001 and B1002 arranged on the two housings 601 respectively and extending along the edges of the housings 601, the sealing tapes A1001 and B1002 are matched, and the sealing tapes A1001 and B1002 are respectively provided with matched concave-convex structures; the concave-convex structures on the sealing tapes A1001 and B1002 respectively extend along the extension directions of the sealing tapes A1001 and B1002.

[0026] The two housings 601 are sealed and connected through the sealing device B10, and the concave-convex structures on the sealing tapes A1001 and B1002 are embedded with each other.

[0027] In actual production process, two shell bodies 601 are respectively arranged on two sides of the gas pipeline 1, the semicircular grooves A on the two shell bodies 601 are combined on the gas pipeline 1, the semicircular grooves B are combined on the flange 2, the two shell bodies 601 are sealed and connected through the sealing device A9 and the gas pipeline 1; the two shell bodies 601 are sealed and connected through the sealing device B10, the concave-convex structures on the sealing strips A1001 and the sealing strips B1002 are embedded with each other, and the two shell bodies 601 are fixed through the fastening device 8.

[0028] The gas is transmitted in the gas pipeline 1; if the gas leaks from the connecting end of the gas pipeline 1, the piston 4 in the sliding hole slides in the sliding hole under the action of the pressure in the gas pipeline 1 and moves away from the connecting end, the sealing ring 3 slides in the tight seam groove under the driving of the piston 4 and gradually enters the limiting groove 602, and the sealing ring 3 and the limiting groove 602 are tightly attached, at the same time, the sealing ring 3 and the limiting groove 602 fasten the two shell bodies 601 to prevent the two shell bodies 601 from loosening; the sealing ring 3 seals the inside of the protective cover 6 under the action of the pressure in the gas pipeline 1, and prevents the gas in the gas pipeline 1 from leaking.

[0029] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or using the prior art, which will not be repeated here; the above embodiments and the drawings are only used to illustrate the technical scheme of the utility model and are not limited to the utility model, the preferred embodiments are described in detail, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. A leak-proof gas pipeline, comprising a flange (2) fixedly connected to the connecting end of a gas pipeline (1), wherein adjacent gas pipelines (1) are fixedly connected to each other via the flange (2); characterized in that: The flange (2) has a sealing groove extending around the gas pipeline (1) on the side away from the connection end. A sealing ring (3) extending along the direction of the sealing groove and sliding along the axial direction of the gas pipeline (1) is provided in the sealing groove. The side of the sealing groove facing the connection end is connected to the connection end of the flange (2) through a sliding hole. A piston (4) sliding along the axial direction of the sliding hole is provided in the sliding hole. The piston (4) is connected to the sealing ring (3). A protective cover (6) adapted to the flange (2) is fitted on the outside of the flange (2), and the side of the sealing ring (3) away from the connection end is fitted with the protective cover (6).

2. The leak-proof gas pipeline according to claim 1, characterized in that: The protective cover (6) includes a housing (601) arranged opposite to each other. The housing (601) has a semi-circular groove A that is adapted to the gas pipeline (1) on the side facing the gas pipeline (1). The two semi-circular grooves A surround the gas pipeline (1), and the two housings (601) are fixedly connected by a fastening device (8). A semi-circular groove B that is adapted to the flange (2) is provided in the semi-circular groove.

3. The leak-proof gas pipeline according to claim 2, characterized in that: A limiting groove (602) extending around the gas pipeline (1) is provided in the semi-circular groove B. The limiting groove (602) is adapted to the sealing ring (3), and the limiting groove (602) is located on the movement trajectory of the sealing ring (3).

4. The leak-proof gas pipeline according to claim 2, characterized in that: The two ends of the two housings (601) are respectively sealed and connected to the gas pipeline (1) by a sealing device A (9) extending around the gas pipeline (1), and the two housings (601) are sealed and connected by a sealing device B (10). The sealing device A (9) and the sealing device B (10) are connected to each other.

5. The leak-proof gas pipeline according to claim 1, characterized in that: The sealing device B (10) includes a sealing strip A (1001) and a sealing strip B (1002) respectively disposed on two housings (601) and extending along the edge of the housings (601). The sealing strip A (1001) and the sealing strip B (1002) are adapted to each other, and the sealing strip A (1001) and the sealing strip B (1002) are respectively provided with adapted concave and convex structures.

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