Natural gas pipeline ripple compensator

Abstract

The utility model provides a natural gas pipeline corrugated compensator, which belongs to the technical field of pipeline compensators and comprises a corrugated pipe, two ends of the corrugated pipe are fixedly connected with end pipes, inner cavities of the end pipes are rotatably provided with blocking pieces, one rotating shaft of each blocking piece is fixedly connected with an extension shaft extending to the outside of the corresponding end pipe, and the outer wall of each extension shaft is sleeved with a transmission chuck. Partition locking clamping pieces are arranged on the side walls, away from the end pipes, of the transmission chucks, and when the blocking pieces rotate to the positions relatively perpendicular to the end pipes, the transmission chucks drive the partition locking clamping pieces to be connected to the corresponding partition fixed-point lock seats in a clamped mode at the moment, so that the blocking pieces are locked, and natural gas leakage is prevented by sealing the two end pipes; according to the acting force generated when the corrugated pipe bursts, the blocking piece can rotate in two different directions according to the stress condition of the contact face, vertical locking points are arranged in the two rotating directions, and then the safety protection effect on the position nearby the pipeline is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline compensators, in particular to a natural gas pipeline corrugated compensator. Background Art

[0002] A natural gas pipeline is a pipeline that transports natural gas from a production site or processing plant to a city's gas distribution center or industrial enterprise users, also known as a gas transmission pipeline. Existing compensators are usually composed of bellows, end pipes, brackets, flanges, and conduits. They utilize the expansion and contraction of the bellows to absorb dimensional changes in pipelines and conduits caused by thermal expansion and contraction, thereby compensating for axial and lateral displacement of pipelines and conduits.

[0003] A related technology (publication number: CN218992741U) discloses a new type of gas pipeline compensator, and the disclosed technical solution is: the shape of the guide plate is set to be an arc shape, which strengthens the guiding effect of the guide plate on the bellows, avoids the bellows from deforming in multiple directions and thus becoming unstable and deformed. At the same time, the guide plate can also protect the bellows to prevent the bellows from being damaged by external collisions.

[0004] In the above-mentioned disclosed technical solutions, the following problems were found in the related technologies: when the pipeline is subjected to expansion and contraction due to thermal expansion and contraction, the bellows part is subjected to corresponding stress. Once the stress on the bellows is too large, causing the bellows to rupture, the expansion force on both sides of the bellows causes the natural gas to be forced to flow to the end pipes on both sides, which will cause natural gas leakage and thus cause accidents. In this regard, we have proposed a new type of natural gas pipeline corrugated compensator.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. In order to solve the problem of natural gas pipeline installation compensation in the above-mentioned prior art, this utility model provides a natural gas pipeline corrugated compensator, which adopts an explosion-proof structure inside the bellows and a compensation adjustment structure to achieve the effect of improving pipeline safety. Its specific technical solution is as follows:

[0007] A natural gas pipeline corrugated compensator includes a bellows, both ends of the bellows are fixedly connected to end pipes, the inner cavity of the end pipe is rotatably provided with a blocking piece, one rotating shaft of the blocking piece is fixedly connected to an extension shaft extending to the outside of the end pipe, a transmission chuck is sleeved on the outer wall of the extension shaft, a partition locking card is provided on the side wall of the transmission chuck away from the end pipe, a partition fixed point lock seat corresponding to the partition locking card is provided on the outer wall of the end pipe, and the partition fixed point lock seat is provided on the outer wall of the end pipe through an elastic reset component.

[0008] In the above technical solution, the elastic reset assembly includes a trapezoidal clamping platform fixedly mounted on the outer wall of the end tube, the inclinations on both sides of the trapezoidal clamping platform correspond to the rotation angle of the blocking member, and brackets are fixedly mounted on the inclined surfaces on both sides of the trapezoidal clamping platform, a directional slide rod is embedded in the inner cavity of the bracket, and the two parts of the partition fixed-point lock seat are symmetrically sleeved on the outside of the directional slide rod, and elastic members are respectively arranged between the two parts of the partition fixed-point lock seat and the inner walls on both sides of the bracket.

[0009] The outer wall of the extension shaft is provided with a partition point limiter, the outer wall of the end tube is fixedly installed with a sealing cylinder that is sleeved on the outside of the extension shaft, and the inner wall of the sealing cylinder is embedded with a partition point stopper, and the spacing angles between the partition point stopper and the partition point limiter on both sides correspond to the angles of rotation of the two sides of the blocking member to the vertical direction.

[0010] The partition fixed-point lock seat is divided into two parts and is engaged with the partition locking clamp.

[0011] A compensation amount adjusting component is provided between the outer walls of the end pipes at both ends.

[0012] The compensation amount adjustment component includes a positioning frame fixedly installed on the outer wall of the end tube, and the positioning frames on the two end tubes are connected by a threaded rod. The outer wall of the threaded rod is symmetrically threaded with locking seats located on both sides of the positioning frame.

[0013] An inner lining pipe is embedded in the inner wall of the corrugated pipe.

[0014] The inner walls of the corrugated pipes are all provided with a heat-insulating layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the natural gas pipeline corrugated compensator:

[0016] 1. When the thermal stress in the bellows is large, the moment the bellows bursts, the explosive force generated exerts a force on the blocking pieces in the two end pipes, causing the blocking pieces to rotate to a position relatively perpendicular to the end pipes. At this time, the transmission chuck drives the partition locking piece to be connected to the corresponding partition fixed-point lock seat, thereby locking the position of the blocking piece and sealing the two end pipes to prevent natural gas leakage.

[0017] 2. By setting the partition fixed-point lock seat at the corresponding positions on both sides, according to the force generated when the bellows bursts, the blocking piece will rotate in two different directions according to the force conditions of the contact surface. Vertical locking points are set for both rotation directions, thereby providing safety protection for the area near the pipeline.

[0018] 3. When the blocking piece is rotated to a position perpendicular to the end pipe, the spherical partition locking card exerts an extruding force, causing the partition locking card to stretch the two parts of the partition fixed-point lock seat. At the same time, the two movable plates compress the two elastic parts respectively and generate elastic force. Through the elastic force of the two elastic parts, the two parts of the partition fixed-point lock seat are relatively closed, thereby locking the position of the partition locking card. After the pipeline is repaired, the partition locking card can be taken out by moving the two parts of the partition fixed-point lock seat to both sides, thereby bringing convenience to relevant personnel during maintenance.

[0019] Fourth, while the blocking piece rotates, the extension shaft is driven to rotate through the rotating shaft on one side, so that the extension shaft drives the partition point limit piece on the outer wall to rotate to the partition point stop piece. The partition point stop piece limits the rotation angle of the extension shaft to prevent the extension shaft from rotating too much, thereby ensuring the accuracy of the locking position of the blocking piece.

[0020] 5. The displacement between the two corrugations of the bellows is dispersed by the compensation adjustment component, which plays the role of adjusting the compensation amount before leaving the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a natural gas pipeline corrugated compensator of the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of a natural gas pipeline corrugated compensator of the utility model. Figure 2 ;

[0023] Figure 3 This is a partial structural exploded diagram of a natural gas pipeline corrugated compensator according to the utility model;

[0024] Figure 4 This is a structural diagram of the partition fixed-point lock seat part of the utility model;

[0025] Figure 5 for Figure 3 A local enlarged view of point A;

[0026] in, Figures 1 to 5 The correspondence between the figure marks and the component names is: 1- bellows, 2- end tube, 3- blocking piece, 4- trapezoidal clamping table, 5- threaded rod, 6- positioning frame, 7- partition locking clamp, 8- transmission chuck, 9- rotating shaft, 10- locking seat, 11- base, 12- sealing seat, 13- sealing cylinder, 14- extension shaft, 15- partition point stopper, 16- partition point limiter, 17- partition fixed point lock seat, 18- bracket, 19- movable plate, 20- slide rod, 21- elastic member, 22- bottom plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The following is a combination of specific implementation cases and attached Figure 1-5 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0029] A natural gas pipeline bellows compensator includes a bellows 1, with end pipes 2 fixedly connected at both ends of the bellows 1. The end pipes 2 are fixedly connected at both ends of the bellows 1, so that the bellows 1 is sealed and connected to the end pipes 2 on both sides. The bellows 1 is connected to the pipeline through the end pipes 2 on both sides. A blocking member 3 is provided for rotation in the inner cavity of the end pipe 2. The specifications of the blocking member 3 correspond to the inner diameter of the end pipe 2, so that the blocking member 3 fits the inner wall of the end pipe 2 and rotates. When the blocking member 3 rotates to a vertical direction, the inner cavity of the end pipe 2 is separated from the inner cavity of the bellows 1.

[0030] One of the rotating shafts 9 of the blocking member 3 is fixedly connected to an extension shaft 14 that extends to the outside of the end tube 2. The other rotating shaft 9 of the blocking member 3 extends to the outside of the end tube 2 and is embedded in a sealing seat 12, which is fixedly embedded in the outer wall of the end tube 2. Bearings are symmetrically embedded in the inner wall of both sides of the end tube 2, and the two rotating shafts 9 are respectively embedded in the inside of the two bearings. One end of one of the rotating shafts 9 penetrates the side wall of the end tube 2 and extends to the outside, where it is fixedly connected to the extension shaft 14.

[0031] A transmission chuck 8 is sleeved on the outer wall of the extension shaft 14. The transmission chuck 8 is fixedly sleeved on the outside of the extension shaft 14 through a mounting hole opened in the center, so that the transmission chuck 8 rotates with the extension shaft 14. A partition locking card 7 is provided on the side wall of the transmission chuck 8 away from the end tube 2. Two base plates 22 are fixedly installed at an angle on the surface of the transmission chuck 8 close to the edge, and a spherical partition locking card 7 is fixedly installed on the surface of the base plate 22. The positions of the two base plates 22 ensure that the two spherical partition locking cards 7 are in a position corresponding to the initial position of the blocking member 3. Through the two partition locking cards 7, when the blocking member 3 rotates under internal stress, components that drive the blocking member 3 to lock are provided in both directions.

[0032] The outer wall of the end tube 2 is provided with a partition fixed point lock seat 17 corresponding to the partition locking clamp 7, and the partition fixed point lock seat 17 is set on the outer wall of the end tube 2 through an elastic reset component. Two partition fixed point lock seats 17 are on the outer wall of the end tube 2 and are respectively located at the locking point of the blocking member 3 when it is rotated in two directions and is vertical.

[0033] During the process of expansion caused by stress in the bellows 2, when the thermal stress is large, the bellows 2 bursts at the moment, and the explosive force generated exerts a force on the blocking members 3 in the two end tubes 2, causing the blocking members 3 to rotate. While the blocking members 3 rotate, the extension shaft 14 is driven to rotate through the rotating shaft 9 on one side, so that the extension shaft 14 drives the partition locking clamp 7 to rotate through the transmission chuck 8.

[0034] When the blocking member 3 rotates to a position relatively vertical to the end pipe 2, the transmission chuck 8 drives the partition locking member 7 to be clamped on the corresponding partition fixed point lock seat 17, thereby locking the position of the blocking member 3 and sealing the two end pipes 2 to prevent natural gas leakage.

[0035] According to the force generated when the bellows 2 bursts, the blocking member 3 will rotate in two different directions according to the force conditions of the contact surface. Vertical locking points are provided for both rotation directions, thereby providing safety protection for the area near the pipeline.

[0036] The elastic reset assembly includes a trapezoidal retaining plate 4 fixedly mounted on the outer wall of the end tube 2. The trapezoidal retaining plate 3 is fixedly mounted on the top of a base 11, which is fixedly mounted on the outer wall of the end tube 2. The inclination of the two sides of the trapezoidal retaining plate 4 corresponds to the rotation angle of the blocking member 3. The position of the trapezoidal retaining plate 4 and the slope of its two inclined surfaces correspond to the angle of rotation of the blocking member 3 in both directions to the vertical direction. That is, after the blocking member 3 is rotated in both directions to the vertical position, it is respectively engaged with the partition fixed point lock seat 17 on the inclined surface of the trapezoidal retaining plate 4.

[0037] The inclined surfaces on both sides of the trapezoidal card table 4 are fixedly mounted with brackets 18, and the inner cavity of the brackets 18 is embedded with a directional slide 20, and the two parts of the partition fixed point lock seat 17 are symmetrically sleeved on the outside of the directional slide 20. Two brackets 18 are fixedly mounted vertically on the inclined surface of each trapezoidal card table 4, and the two brackets 18 are fixedly connected by slides 20 located at the four corners. The partition fixed point lock seat 17 is composed of two parts of hemispherical cavity card seats. A spherical cavity corresponding to the shape of the partition locking card 7 is opened on the partition fixed point lock seat 17, and then the partition fixed point lock seat 17 is divided into two identical card seats. The two parts of the card seat of the partition fixed point lock seat 17 are fixedly mounted on the outer wall with their backs facing each other. The movable plate 19 is movably sleeved on the outside of the slide 20 by opening a mounting hole that runs through the inner cavity.

[0038] Elastic members 21 are installed between the two parts of the partition fixed-point lock seat 17 and the inner walls of the bracket 18 on both sides. The elastic member 21 is a compression spring. The two ends of the elastic member 21 are fixedly mounted on the opposite surfaces of the movable plate 19 and the bracket 18, and the elastic member 21 is movably connected to the outside of the slide rod 20, so that the elastic member 21 fits the outer wall of the slide rod 20 and slides telescopically.

[0039] When the blocking member 3 rotates to a position perpendicular to the end tube 2, the transmission chuck 8 drives the corresponding partition locking card 7 to be clamped between the two parts of the partition fixed point lock seat 17. With the squeezing force of the spherical partition locking card 7, the partition locking card 7 opens the two parts of the partition fixed point lock seat 17. At the same time, the two movable plates 19 compress the two elastic members 21 respectively and generate elastic force. After the spherical partition locking card 7 is clamped into the partition fixed point lock seat 17, the elastic force of the two elastic members 21 causes the two parts of the partition fixed point lock seat 17 to be relatively closed, thereby locking the partition locking card 7 in position.

[0040] After the pipeline is repaired, the partition locking fixture 7 can be taken out by moving the two parts of the partition fixed-point lock seat 17 to both sides, thereby bringing convenience to relevant personnel during maintenance.

[0041] It is worth noting that the outer wall of the extension shaft 14 is provided with a cutoff point stopper 16. The outer wall of the end tube 2 is fixedly mounted with a sealing cylinder 13 that is sleeved onto the exterior of the extension shaft 14. The inner wall of the sealing cylinder 13 is embedded with a cutoff point stopper 15. The angle between the cutoff point stopper 15 and the cutoff point stopper 16 corresponds to the angle at which the two sides of the blocking member 3 are rotated to the vertical direction. The extension shaft 14 passes through the sealing cylinder 13 and extends to the exterior.

[0042] When the thermal stress is high, the moment the bellows 2 bursts, the explosive force generated exerts a force on the blocking members 3 in the two end tubes 2, causing the blocking members 3 to rotate. As the blocking members 3 rotate, the rotation shaft 9 on one side drives the extension shaft 14 to rotate, causing the extension shaft 14 to drive the isolation point limiter 16 on the outer wall to rotate to the isolation point stopper 15.

[0043] By limiting the rotation angle of the extension shaft 14 by the blocking member 15 , the extension shaft 14 is prevented from rotating too much, thereby ensuring the accuracy of the locking position of the blocking member 3 .

[0044] The partition fixed point lock seat 17 is divided into two parts and is engaged with the partition locking card 7.

[0045] In addition, a compensation adjustment member is provided between the outer walls of the two end tubes 2. The main function of the compensation adjustment member is to disperse the displacement between the two corrugations of the corrugated tube 1 and to adjust the compensation amount before leaving the factory.

[0046] In addition, the compensation amount adjustment component includes a positioning frame 6 fixedly installed on the outer wall of the end tube 2. The positioning frames 6 on the two end tubes 2 are connected by a threaded rod 5. The outer wall of the threaded rod 5 is symmetrically threaded with locking seats 10 located on both sides of the positioning frame 6.

[0047] The compensation amount is adjusted by four circumferential threaded rods 5 to ensure the normal operation of the compensator. The bellows 1 is adjusted and locked to prevent deformation during transportation, thereby achieving the effect of transportation protection.

[0048] Furthermore, an inner lining pipe is embedded in the inner wall of the corrugated pipe 1. The inner lining pipe is used as a protective material for the inner wall of the pipeline under special conditions such as corrosion resistance and wear resistance, thereby ensuring the strength of the corrugated pipe 1.

[0049] The inner wall of the corrugated pipe 1 is provided with a heat-insulating layer. The heat-insulating layer is a polyurethane foam to prevent the temperature difference between the inside and outside of the natural gas pipeline from being too large.

[0050] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0052] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0053] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas pipeline bellows compensator, comprising a bellows (1), both ends of the bellows (1) being fixedly connected to end pipes (2), characterized in that: The inner cavity of the end tube (2) is rotatably provided with a blocking member (3), a rotating shaft (9) of the blocking member (3) is fixedly connected to an extension shaft (14) extending to the outside of the end tube (2), a transmission chuck (8) is sleeved on the outer wall of the extension shaft (14), a partition locking card (7) is provided on the side wall of the transmission chuck (8) away from the end tube (2), a partition fixed point lock seat (17) corresponding to the partition locking card (7) is provided on the outer wall of the end tube (2), and the partition fixed point lock seat (17) is provided on the outer wall of the end tube (2) through an elastic reset component.

2. A natural gas pipeline corrugated compensator according to claim 1, characterized in that: The elastic reset assembly includes a trapezoidal card table (4) fixedly mounted on the outer wall of the end tube (2), the inclination of both sides of the trapezoidal card table (4) corresponds to the rotation angle of the blocking member (3), the inclined surfaces on both sides of the trapezoidal card table (4) are fixedly mounted with brackets (18), the inner cavity of the bracket (18) is embedded with a directional slide bar (20), the two parts of the partition fixed point lock seat (17) are symmetrically sleeved on the outside of the directional slide bar (20), and elastic members (21) are respectively provided between the two parts of the partition fixed point lock seat (17) and the inner walls on both sides of the bracket (18).

3. The natural gas pipeline corrugated compensator according to claim 1, characterized in that: The outer wall of the extension shaft (14) is provided with a partition point limiter (16), the outer wall of the end tube (2) is fixedly mounted with a sealing cylinder (13) sleeved on the outside of the extension shaft (14), the inner wall of the sealing cylinder (13) is embedded with a partition point stopper (15), and the spacing angles between the partition point stopper (15) and the partition point limiter (16) on both sides respectively correspond to the angles at which the two sides of the blocking member (3) are rotated to the vertical direction.

4. The natural gas pipeline corrugated compensator according to claim 1, characterized in that: The partition fixed-point lock seat (17) is divided into two parts and is engaged with the partition locking clamp (7).

5. The natural gas pipeline corrugated compensator according to claim 1, characterized in that: A compensation amount adjusting component is provided between the outer walls of the end tubes (2) at both ends.

6. The natural gas pipeline corrugated compensator according to claim 5, characterized in that: The compensation amount adjustment component comprises a positioning frame (6) fixedly mounted on the outer wall of the end tube (2), the positioning frames (6) on the two end tubes (2) are connected via a threaded rod (5), and the outer wall of the threaded rod (5) is symmetrically threaded with locking seats (10) located on both sides of the positioning frame (6).

7. The natural gas pipeline corrugated compensator according to claim 1, characterized in that: An inner lining tube is embedded in the inner wall of the corrugated pipe (1).

8. The natural gas pipeline corrugated compensator according to claim 1, characterized in that: The inner wall of the corrugated pipe (1) is provided with a heat-insulating layer.

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