Gas pipeline connecting device

Abstract

The utility model relates to a gas pipeline connecting device which comprises a left pipeline and a right pipeline. The device further comprises a protection part. The opposite ends of the left pipeline and the right pipeline are connected with a left flange plate and a right flange plate respectively, an elastic cushion is fixed to the right side face of the left flange plate, and the left flange plate and the right flange plate are connected through a plurality of connecting bolts. U-shaped grooves are formed in the upper ends of the outer ring faces of the left flange plate and the right flange plate, the protection piece comprises a protection ring, a vertical plate, a screw and a pressing rod, the left flange plate and the right flange plate are jointly sleeved with the protection ring, the right portion of the pressing rod stretches into the U-shaped grooves of the left flange plate and the right flange plate, and the right portion of the pressing rod downwards abuts against the upper end of the protection ring. The upper end of the protection ring is in a U shape and located in the two U-shaped grooves. The utility model solves the problems that the joint of the gas pipeline is easy to leak and the gasket between the flange plates is easy to corrode.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a gas pipeline connection device. Background Art

[0002] The connection of gas pipelines is an important part of the construction of pipeline systems. It is related to the integrity, safety and reliability of pipelines. The connection between pipelines is achieved through flanges and bolts. Flange connection can be used for gas pipelines of various pressure levels. It is a widely used connection method. Flanges are equipped with gaskets to achieve sealing between pipelines.

[0003] The connection of gas pipelines has the problems mentioned in the authorization announcement number CN 219221546 U "A Gas Pipeline Butt Sealing Device", namely: the pipeline joint is prone to leakage due to gaps; outdoor gas pipelines are generally buried underground, and the gaskets between the two flanges are corroded by the soil, easily aged, and lose elasticity prematurely, which can also cause gas leakage. Summary of the invention

[0004] The utility model provides a gas pipeline connecting device to solve the problems that leakage is easy to occur at the connection of the gas pipeline and the gasket between the flanges is easy to be corroded, and can improve the sealing performance of the gas pipeline connection.

[0005] In order to solve the above problems, the technical solution of the utility model is:

[0006] A gas pipeline connecting device comprises a left pipeline and a right pipeline; and also comprises a protective member; the opposite ends of the left pipeline and the right pipeline are respectively connected with a left flange and a right flange, an elastic pad is fixed on the right side surface of the left flange, and the left flange and the right flange are connected by multiple connecting bolts; the upper ends of the outer ring surfaces of the left flange and the right flange are provided with a U-shaped groove, and the protective member comprises a protective ring, a vertical plate, a screw and a pressure rod, and the left flange and the right flange are jointly covered with a protective ring. The vertical plate is fixedly connected to the left side surface of the left flange, and a strip hole is provided on the vertical plate. The lower end of the screw is rotatably connected to the bottom surface of the strip hole, and the upper end passes through the vertical plate on the upper side of the strip hole. The left end of the pressure rod extends into the strip hole and is threadedly connected to the screw, and the right part of the pressure rod extends into the U-shaped grooves of the left and right flanges, and the right part of the pressure rod presses downward on the upper end of the protective ring, and the upper end of the protective ring is U-shaped and located in the two U-shaped grooves.

[0007] Furthermore, the left ends of the front and rear side surfaces of the pressure rod are in sliding contact with the front and rear side surfaces of the strip hole respectively, and there are equal spacings between the front and rear side surfaces of the pressure rod and the front and rear side surfaces of the U-shaped groove respectively; the front side surface of the U-shaped groove on the left flange and the outer annular surface of the left flange intersect in a circular arc transition, and the rear side surface of the U-shaped groove and the outer annular surface of the left flange intersect in a circular arc transition.

[0008] Furthermore, the protection ring is an elastic annular body made of expanded polytetrafluoroethylene. When the protection ring is in a natural state, the inner diameter of the protection ring matches the outer diameter of the left flange.

[0009] Furthermore, a sealing member is provided between the left flange and the right flange; the sealing member comprises a sealing ring, an elastic ring and a groove, the sealing ring is coaxially fixedly connected to the right side surface of the left flange, the elastic ring is wrapped and fixed outside the sealing ring through an annular groove opened on the left side surface, a circular groove is recessed to the right on the left side surface of the right flange, the groove and the sealing ring are opposite to each other left and right, the left end opening width of the groove is larger than the inner bottom width, and the right parts of the sealing ring and the elastic ring extend into the groove.

[0010] Furthermore, the left end opening width of the clamping groove corresponds to the distance between the inner and outer rings of the elastic ring, and the inner bottom width of the clamping groove is greater than the distance between the inner and outer rings of the sealing ring.

[0011] Furthermore, the elastic pad includes an elastic pad one and an elastic pad two, the elastic pad one is fixed to the right side surface of the left flange outside the elastic ring, and the elastic pad two is fixed to the right side surface of the left flange inside the elastic ring.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] After the left flange and the right flange are connected, the utility model sleeves the protective ring outside the left flange and the right flange, and under the action of the pressure rod on the protective member, the protective ring is stretched and wrapped around the left flange and the right flange, so as to block the gap between the left flange and the right flange, which can not only improve the sealing performance but also prevent the elastic gasket from being corroded by external factors.

[0014] During the connection process of the utility model, the sealing ring on the left flange drives the elastic ring to enter the clamping groove on the right flange, the elastic ring entering the clamping groove is squeezed, and the elastic ring squeezed in the clamping groove forms a seal between the left flange and the right flange, further improving the sealing performance of the connection between the left pipeline and the right pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a sectional front view of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the left flange of the utility model;

[0018] Figure 4 A structural schematic diagram of the right flange of the utility model.

[0019] The numbers in the accompanying drawings are: 1. left pipe, 2. right pipe, 3. left flange, 4. right flange, 5. connecting bolt, 6. U-shaped groove, 7. protective ring, 8. vertical plate, 9. screw, 10. pressure rod, 11. strip hole, 12. rotating plate, 13. sealing ring, 14. elastic ring, 15. slot, 16. elastic pad one, 17. elastic pad two, 18. nut. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0021] like Figure 1 to Figure 4 As shown, a gas pipeline connection device includes a left pipeline 1 and a right pipeline 2 with opposite ends; and also includes a protective member; the opposite ends of the left pipeline 1 and the right pipeline 2 are respectively connected with a left flange 3 and a right flange 4, and the left flange 3 and the right flange 4 are of the same shape and size. The left flange 3 is a circular ring body with an inner diameter equal to the inner diameter of the left pipeline 1 and an outer diameter greater than the outer diameter of the left pipeline 1. An elastic pad is fixed on the right side surface of the left flange 3. The left flange 3 and the right flange 4 are opposite to each other on the left and right, and are connected by a plurality of connecting bolts 5; the upper ends of the outer annular surfaces of the left flange 3 and the right flange 4 are each provided with a U-shaped groove 6, and the upper end and left and right ends of the U-shaped groove 6 are open. The protective part includes a protective ring 7, a vertical plate 8, a screw 9 and a pressure rod 10. The left flange 3 and the right flange 4 are jointly covered with a protective ring 7. The vertical plate 8 is fixedly connected to the left side of the left flange 3. A strip hole 11 is provided on the vertical plate 8. The lower end of the screw 9 is rotatably connected to the bottom surface of the strip hole 11, and the upper end passes through the vertical plate 8 on the upper side of the strip hole 11. The upper end of the screw 9 is connected to a rotating plate 12. The pressure rod 10 is a rectangular rod. The left end of the pressure rod 10 extends into the strip hole 11 and is threadedly connected to the screw 9. The right part of the pressure rod 10 extends into the U-shaped groove 6 of the left flange 3 and the right flange 4. The right part of the pressure rod 10 presses the upper end of the protective ring 7 downward, and the upper end of the protective ring 7 is U-shaped and located in the two U-shaped grooves 6.

[0022] The left ends of the front and rear side surfaces of the pressure rod 10 are in sliding contact with the front and rear side surfaces of the strip hole 11 respectively, and there are equal spacings between the front and rear side surfaces of the pressure rod 10 and the front and rear side surfaces of the U-shaped groove 6 respectively; the front side surface of the U-shaped groove 6 on the left flange 3 and the outer annular surface of the left flange 3 intersect in a circular arc transition, and the rear side surface of the U-shaped groove 6 and the outer annular surface of the left flange 3 intersect in a circular arc transition.

[0023] The protective ring 7 is an elastic annular body made of expanded polytetrafluoroethylene. The expanded polytetrafluoroethylene has the advantages of corrosion resistance, flexibility and elasticity. When the protective ring 7 is in a natural state, the inner diameter of the protective ring 7 matches the outer diameter of the left flange 3.

[0024] A sealing member is provided between the left flange 3 and the right flange 4; the sealing member comprises a sealing ring 13, an elastic ring 14 and a groove 15, wherein the sealing ring 13 is a circular ring body, and the sealing ring 13 is coaxially fixedly connected to the right side surface of the left flange 3, and the elastic ring 14 is a circular ring body made of elastic rubber, and the elastic ring 14 is wrapped and fixed to the outside of the sealing ring 13 through an annular groove opened on the left side surface, and a circular groove 15 is recessed to the right on the left side surface of the right flange 4, and the groove 15 and the sealing ring 13 are opposite to each other on the left and right sides, and the left end opening width of the groove 15 is greater than the inner bottom width, and the right parts of the sealing ring 13 and the elastic ring 14 extend into the groove 15.

[0025] The left end opening width of the clamping groove 15 matches the inner and outer ring distance of the elastic ring 14 , and the inner bottom width of the clamping groove 15 is greater than the inner and outer ring distance of the sealing ring 13 .

[0026] The elastic pad includes an elastic pad 16 and an elastic pad 2 17 . The elastic pad 16 is fixed to the right side of the left flange 3 outside the elastic ring 14 , and the elastic pad 2 17 is fixed to the right side of the left flange 3 inside the elastic ring 14 .

[0027] The end of each connecting bolt 5 passes through the left flange 3, the elastic pad 16 and the right flange 4 in sequence, and the end of each connecting bolt 5 is limited by a nut 18.

[0028] During installation, since the left end of the pressure rod 10 slides in contact with the strip hole 11, when the screw 9 is rotated, the pressure rod 10 can only move upward or downward. The screw 9 is rotated to drive the pressure rod 10 to move upward above the upper end of the left flange. The left flange 3 and the right flange 4 are connected by a plurality of connecting bolts 5. When the nut 18 on each connecting bolt 5 is tightened, the left flange 3 and the right flange 4 move relative to each other, and the elastic pads 1 and 2 on the right side of the left flange 3 are squeezed to form a seal between the left flange 3 and the right flange 4. During the relative movement of the left flange 3 and the right flange 4, the sealing ring 13 drives the right part of the elastic ring 14 to extend into the slot 15. Since the left end opening width of the slot 15 matches the inner and outer ring distances of the elastic ring 14, the left end opening width of the slot 15 is greater than the inner bottom width, and the elastic ring 14 entering the slot 15 is squeezed. The extruded elastic ring 14 forms a seal again between the left flange 3 and the right flange 4, further improving the sealing performance; after the left flange 3 and the right flange 4 are connected by the connecting bolts 5, the protective ring 7 is sleeved on the outside of the left flange 3 and the right flange 4. At this time, the protective ring 7 is in a natural state, and the screw 9 is rotated in the opposite direction to drive the pressure rod 10 to move downward. The pressure rod 10 moves downward to press the upper end of the protective ring 7 in a U shape and enters the two U-shaped grooves 6. The protective ring 7 is stretched and wrapped around the outside of the left flange 3 and the right flange 4 to block the gap between the left flange 3 and the right flange 4, which can not only further improve the sealing performance between the left flange 3 and the right flange 4, but also prevent external factors from corroding the elastic pad 16 and the elastic pad 2 17 through the gap between the flange 3 and the right flange 4, thereby improving the service life of the elastic pad 16 and the elastic pad 2 17;

[0029] Therefore, after the left flange 3 and the right flange 4 are connected, the utility model is protected by the protective ring, which can improve the sealing performance of the connection between the left pipeline 1 and the right pipeline 2.

[0030] The preferred implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the above-mentioned embodiments. Without violating the spirit of the present invention, i.e., the disclosure scope, any equivalent or equivalent deformation or replacement of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A gas pipeline connection device, comprising a left pipeline (1) and a right pipeline (2); characterized in that: It also includes a protective member; the left pipe (1) and the right pipe (2) are connected to the opposite ends thereof with a left flange (3) and a right flange (4), respectively; an elastic pad is fixed on the right side surface of the left flange (3); the left flange (3) and the right flange (4) are connected via a plurality of connecting bolts (5); the upper ends of the outer annular surfaces of the left flange (3) and the right flange (4) are both provided with a U-shaped groove (6); the protective member includes a protective ring (7), a vertical plate (8), a screw rod (9) and a pressure rod (10); the outer surfaces of the left flange (3) and the right flange (4) are collectively covered with a protective ring (7); ), the vertical plate (8) is fixedly connected to the left side of the left flange (3), a strip hole (11) is provided on the vertical plate (8), the lower end of the screw rod (9) is rotatably connected to the bottom surface of the strip hole (11), and the upper end passes through the vertical plate (8) on the upper side of the strip hole (11), the left end of the pressure rod (10) extends into the strip hole (11) and is threadedly connected to the screw rod (9), the right part of the pressure rod (10) extends into the U-shaped grooves (6) of the left flange (3) and the right flange (4), the right part of the pressure rod (10) presses the upper end of the protective ring (7) downward, and the upper end of the protective ring (7) is U-shaped and located in the two U-shaped grooves (6).

2. A gas pipeline connection device according to claim 1, characterized in that: The left ends of the front and rear side surfaces of the pressure rod (10) are in sliding contact with the front and rear side surfaces of the strip hole (11), respectively. There is an equal spacing between the front and rear side surfaces of the pressure rod (10) and the front and rear side surfaces of the U-shaped groove (6). The intersection of the front side surface of the U-shaped groove (6) on the left flange (3) and the outer annular surface of the left flange (3) forms an arc transition, and the intersection of the rear side surface of the U-shaped groove (6) and the outer annular surface of the left flange (3) forms an arc transition.

3. A gas pipeline connection device according to claim 1, characterized in that: The protective ring (7) is an elastic annular body made of expanded polytetrafluoroethylene. When the protective ring (7) is in a natural state, the inner diameter of the protective ring (7) matches the outer diameter of the left flange (3).

4. A gas pipeline connection device according to claim 1, characterized in that: A sealing member is provided between the left flange (3) and the right flange (4); the sealing member comprises a sealing ring (13), an elastic ring (14) and a retaining groove (15); the sealing ring (13) is coaxially fixedly connected to the right side surface of the left flange (3); the elastic ring (14) is wrapped and fixed to the outside of the sealing ring (13) through an annular groove opened on the left side surface; a circular retaining groove (15) is recessed to the right on the left side surface of the right flange (4); the retaining groove (15) and the sealing ring (13) are opposite to each other on the left and right sides; the left end opening width of the retaining groove (15) is larger than the inner bottom width; the right parts of the sealing ring (13) and the elastic ring (14) extend into the retaining groove (15).

5. A gas pipeline connection device according to claim 4, characterized in that: The width of the left end opening of the clamping groove (15) matches the distance between the inner and outer rings of the elastic ring (14), and the inner bottom width of the clamping groove (15) is greater than the distance between the inner and outer rings of the sealing ring (13).

6. A gas pipeline connection device according to claim 4, characterized in that: The elastic pad comprises an elastic pad 1 (16) and an elastic pad 2 (17). The elastic pad 1 (16) is fixed to the right side surface of the left flange (3) outside the elastic ring (14), and the elastic pad 2 (17) is fixed to the right side surface of the left flange (3) inside the elastic ring (14).

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