Natural gas pipeline leakage repairing device

Abstract

The utility model relates to the technical field of pipeline repairing, in particular to a natural gas pipeline leakage repairing device which comprises a belt body and further comprises a wind-up roller used for winding and containing the belt body, a supporting rod is arranged at the end of the wind-up roller, one end of the supporting rod is rotationally connected with the wind-up roller with the axis of the wind-up roller as the center, and the other end of the supporting rod extends in the radial direction of the wind-up roller. The ends, back on to the winding roller, of the supporting rods are provided with connecting parts used for annularly wrapping the gas pipeline in a sleeving mode, and the axes of the connecting parts are parallel to the axis of the winding roller. The problems that in the prior art, due to the fact that manual operation is completely depended on, the force is difficult to control, the phenomenon of untight sealing or winding loosening easily occurs, and the sealing reliability is poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, specifically to a natural gas pipeline leak repair device. Background Technology

[0002] As a vital energy transmission facility, the safe operation of gas pipelines is of paramount importance. However, due to factors such as pipeline aging, corrosion, or external damage, natural gas leaks occur frequently, necessitating regular inspections. During inspections, if a leak is discovered, immediate emergency measures must be taken to prevent large-scale natural gas leakage and avoid secondary disasters such as fires and explosions.

[0003] In emergency situations, a common method is to manually wrap pipe tape (such as sealing tape or fiber-reinforced composite material) around the outside of the leak point, applying tension to achieve a temporary seal. This method is simple to operate and can quickly slow down the leak. The operating steps are as follows:

[0004] First, the wrapping tape is rolled up. One hand lifts the free end of the wrapping tape and presses it near the gas pipeline leak point. The other hand holds the wrapping tape and rotates it around the gas pipeline while tightening it, making spiral wrapping. The next turn of the wrapping tape presses out of the previous turn.

[0005] After the extended portion of the wrapping tape is wrapped around the gas pipeline, stop wrapping the pipeline and control the wrapping tape to rotate and extend it. After extending a certain length, tighten the wrapping tape again and rotate it to wrap the pipeline. Similarly, perform the second and third extensions until the wrapping tape covers the gas pipeline leak point and extends a section along the pipeline axis. Finally, apply a coagulant or other agent for reinforcement.

[0006] However, the winding process requires maintaining a relatively uniform and moderate tension. Excessive tension can cause deformation of the winding tape or damage to the pipe under pressure, while insufficient tension will result in ineffective sealing. Because it relies entirely on manual operation, it is difficult to control the force, which can easily lead to incomplete sealing or loosening of the winding tape, resulting in poor sealing reliability. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a natural gas pipeline leak repair device to solve the problem that the existing technology is completely dependent on manual operation, which makes it difficult to control the force, and easily leads to poor sealing or loosening of the entanglement, resulting in poor sealing reliability.

[0008] This utility model is achieved through the following technical solution:

[0009] A natural gas pipeline leak repair device includes a belt and a take-up roller for winding and storing the belt. The end of the take-up roller is provided with a support rod. One end of the support rod is rotatably connected to the take-up roller about the axis of the take-up roller, and the other end extends radially toward the take-up roller.

[0010] The support rod has a connecting part for looping around the gas pipeline at the end facing away from the take-up roller, and its axis is parallel to the axis of the take-up roller.

[0011] Furthermore, a friction block is provided on a plane of the support rod facing the take-up roller, and the friction block abuts against the take-up roller.

[0012] Furthermore, the friction block is slidably connected to the support rod along the length of the support rod, and the end of the take-up roller facing the support rod is located on the movement trajectory of the friction block;

[0013] The support rod is provided with an adjustment part for driving the friction block to slide on the support rod.

[0014] Furthermore, a groove extending in the length direction of the support rod is provided on the side of the support rod facing the take-up roller. One end of the friction block is inserted into the groove and slidably engaged, while the other end extends out of the groove.

[0015] The adjusting part includes a lead screw that extends along the length of the support rod and is embedded in the slide groove. One end of the lead screw passes through the inner wall of the slide groove and extends out of the support rod, and is rotatably engaged with the support rod. The other end of the lead screw passes through the friction block and is connected by a threaded engagement.

[0016] Furthermore, the friction block includes a friction plate, a compression spring, and a slider. The friction plate and the slider are both slidably engaged with the groove, and the lead screw passes through the slider and is connected by a threaded connection.

[0017] The compression spring is sleeved outside the middle of the lead screw. One end of the compression spring abuts against the friction plate, and the other end abuts against the slider. When the compression spring is in its naturally extended state, the friction plate abuts against the winding roller.

[0018] Furthermore, one end of the belt is detachably fixed to the outer surface of one end of the take-up roller, and the other end is spirally wound around the outside of the take-up roller along the axial direction of the take-up roller.

[0019] Furthermore, a limiting groove is provided on the outer circular surface of the take-up roller, extending spirally toward the axial direction of the take-up roller, and the belt body is embedded in the limiting groove.

[0020] Furthermore, the take-up roller is coaxially rotatably fitted with a rotating shaft, both ends of which extend out of the take-up roller, and both ends of the rotating shaft are fixedly connected to support rods.

[0021] Furthermore, the connecting part includes a fixed strip and a movable strip in the shape of an arc, and the central angle of the fixed strip and the movable strip is less than or equal to 180 degrees;

[0022] The outer circular surface of the fixing bar is fixedly connected to the end of the support rod facing away from the take-up roller, and the axis of the fixing bar is parallel to the axis of the take-up roller;

[0023] The movable strip and the fixed strip are rotatably connected coaxially, and the inner diameter of the movable strip is equal to the inner diameter of the fixed strip. A limiting part is provided between the movable strip and the fixed strip to restrict the rotation of the movable strip.

[0024] Furthermore, an arc-shaped groove is formed on the inner circular surface of the fixed strip, and the movable strip is embedded in the arc-shaped groove and slides in fit;

[0025] The fixed strip has an insertion hole with a connecting arc groove on its outer circular surface, and the movable strip has a limiting hole on its outer circular surface. After the movable strip slides out from the fixed strip, the limiting hole is opposite to the insertion hole, and the central angle of the movable strip and the fixed strip as a whole is greater than 180 degrees when the limiting hole is opposite to the insertion hole.

[0026] The limiting part includes a pin, one end of which is inserted into the insertion hole and the limiting hole in sequence to be in a plugged state.

[0027] The beneficial effects of this utility model are as follows:

[0028] This natural gas pipeline leak repair device works by winding a tape around a take-up roller and connecting the support rod and the take-up roller to the gas pipeline using a connecting part. This allows the take-up roller to revolve around the gas pipeline. When the free end of the tape is connected to the gas pipeline, relevant technicians only need to operate the support rod or the take-up roller to revolve around the gas pipeline to perform the tape winding work.

[0029] The resistance of the support rod restricts the rotation of the take-up roller on the support rod, keeping the belt taut. When the tension is greater than the resistance, the take-up roller releases the belt by rotating, automatically reducing the tension. This minimizes the fluctuation of tension during belt winding, thereby improving sealing reliability.

[0030] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the planar structure of an embodiment of the present utility model;

[0033] Figure 3Bit Figure 2 Sectional view of AA;

[0034] Figure 4 This is an exploded view of an embodiment of the present utility model;

[0035] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0036] Figure 6 This is a schematic diagram of the planar structure of the take-up roller in an embodiment of this utility model;

[0037] Figure 7 This is a three-dimensional structural diagram of the support rod in an embodiment of the present utility model;

[0038] Figure 8 This is a three-dimensional structural diagram of the movable strip in an embodiment of the present invention.

[0039] In the diagram: 1. Belt body; 2. Take-up roller; 21. Limiting groove; 22. Rotating shaft; 3. Support rod; 31. Slide groove; 32. Lead screw; 4. Friction block; 41. Friction plate; 42. Compression spring; 43. Sliding block; 51. Fixing bar; 511. Arc groove; 512. Insertion hole; 52. Movable bar; 521. Limiting hole; 53. Pin. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0045] Please see Figure 1-8 This utility model provides a technical solution: a natural gas pipeline leak repair device, including a belt body 1, and a winding roller 2 for winding and storing the belt body 1. The winding roller 2 is provided with a support rod 3 at its end. One end of the support rod 3 is rotatably connected to the winding roller 2 about the axis of the winding roller 2, and the other end extends radially toward the winding roller 2.

[0046] The support rod 3 has a connecting part for looping around the gas pipeline at one end facing away from the winding roller 2, and its axis is parallel to the axis of the winding roller 2.

[0047] In this solution, by winding the belt 1 onto the take-up roller 2 and connecting the support rod 3 and the take-up roller 2 to the gas pipeline using the connecting part, the take-up roller 2 can revolve around the gas pipeline. When the free end of the belt 1 is connected to the gas pipeline, the relevant technicians only need to operate the support rod 3 or the take-up roller 2 to revolve around the gas pipeline to perform the winding work of the belt 1.

[0048] The winding roller 2 is restricted from rotating on the support rod 3 by the resistance of the support rod 3, so that the belt 1 is kept in a taut state. When the tension is greater than the resistance, the winding roller 2 releases the belt 1 by rotating itself, automatically reducing the tension. This makes the fluctuation of the tension during the winding of the belt 1 smaller, thereby improving the sealing reliability.

[0049] Among them, the belt body 1 is a winding belt (which can be selected as sealing tape or fiber reinforced composite material).

[0050] A high-friction coefficient coating can be applied to the plane of the support rod 3 facing the take-up roller 2. This plane contacts the end face of the take-up roller 2, increasing the friction between the support rod 3 and the take-up roller 2. This friction counteracts the tension force, providing an anti-slip effect and maintaining a stable relative position between the support rod 3 and the take-up roller 2. The take-up roller 2 can only rotate relative to the support rod 3 when the tension of the belt 1 is greater than the frictional resistance. Initially (at the factory), a tension gauge can be used to hook the free end of the belt 1 and pull it taut. The tension force of the take-up roller 2 rotating on the support rod 3 can be tested. The friction force can be adjusted by changing the magnitude of the normal force until the required tension of the belt 1 is met. It should be noted that the friction force does not need to be precisely calculated / designed; it only needs to be sufficient to drive the take-up roller 2 to rotate on the support rod 3 under the required tension force.

[0051] The fixed end of the belt body 1 can be fixedly installed on the outer surface of the take-up roller 2 by means of bolt fastening or bonding, so as to avoid the belt body 1 sliding on the take-up roller 2 and affecting the normal winding operation of the belt body 1.

[0052] The connecting part can be selected as a clamp or other structure. By placing the clamp outside the pipe, the winding roller 2 can rotate around the gas pipe, keeping the distance between the winding roller 2 and the gas pipe constant, and avoiding large fluctuations in tension due to changes in the distance.

[0053] Furthermore, all components, including the winding roller 2, support rod 3, and connecting parts, can be made of plastic to prevent sparks from metal collisions from igniting leaked gas. Simultaneously, when the control connecting part (clamp) rotates on the gas pipeline, it rotates at a slow, uniform speed, utilizing the surrounding air to carry away the heat generated by friction, preventing excessive heat buildup due to excessive rotation speed.

[0054] When using it, the steps are as follows:

[0055] Step 1: Confirm that the tape 1 (sealing tape or fiber-reinforced composite material) on the take-up roller 2 is neatly wound and the fixed end is firmly connected to the outer surface of the take-up roller 2 (fixed by bolts or adhesive). Remove dirt, rust or residue from the surface of the gas pipeline leak. Ensure that the tape 1 can fit tightly against the pipeline. Operators must wear anti-static equipment, stay away from open flames, and ensure that the working environment is well-ventilated.

[0056] Step 2: Place the connecting part (clamp) at the end of the support rod 3 onto the gas pipeline and adjust it to a position near the leak point. Ensure that the winding roller 2 is parallel to the pipeline axis and tighten the clamp bolts (if adjustable) to securely wrap the pipeline, but keep the clamp able to be rotated slowly by hand.

[0057] Step 3: Hold the support rod 3 or the take-up roller 2 and rotate it slowly and evenly around the gas pipeline to make the belt 1 spirally wind around the pipeline. The friction between the support rod 3 and the end face of the take-up roller 2 will limit the rotation of the take-up roller 2 and keep the belt 1 taut. If the tension is too high, the take-up roller 2 will automatically release a small amount of the belt 1 to adjust the tension. Each turn of the belt 1 should overlap with the previous turn (it is recommended to overlap by more than 50%) to ensure complete coverage of the leak point and enhance the sealing.

[0058] Step 4: After wrapping the belt until it completely covers the leak point and extends at least 5-10cm beyond its edge, cut the belt body 1, re-glu the end or fix it mechanically, check the overall seal, and if necessary, press the surface of the belt body 1 with your hand or a tool to remove air bubbles or wrinkles.

[0059] Step 5: If the clamp is a temporary installation, loosen the bolts and remove the repair device; if the support needs to be retained, keep the clamp fixed to the pipe.

[0060] Step six: After repair, monitor whether the leak point is completely sealed or the gas leakage rate is significantly reduced, end the emergency response work, and then block the gas pipeline at a later date, using welding or other methods to permanently seal the leak point.

[0061] In this embodiment: a friction block 4 is provided on a plane of the support rod 3 facing the take-up roller 2, and the friction block 4 abuts against the take-up roller 2.

[0062] In this scheme, the friction block 4 can be made of rubber material, which has a large coefficient of friction. By fixing and bonding the friction block 4 to the support rod 3, the friction block 4 and the end face of the take-up roller 2 are kept in contact, providing friction to limit the rotation of the take-up roller 2 on the support rod 3.

[0063] Alternatively, the thickness of the friction block 4 can be adjusted to change the positive pressure applied by the winding roller 2, thereby adjusting the magnitude of the friction force until the tension requirement of the belt 1 is met.

[0064] In this embodiment: the friction block 4 is slidably connected to the support rod 3 along the length of the support rod 3, and the end of the take-up roller 2 facing the support rod 3 is located on the movement trajectory of the friction block 4;

[0065] The support rod 3 is provided with an adjustment part for driving the friction block 4 to slide on the support rod 3.

[0066] In this solution, the belt 1 is for single use only, while the other components can be reused to reduce economic costs.

[0067] Because friction block 4 wears during the friction process, its friction force will change as friction block 4 wears. By adjusting the friction block 4, the friction block 4 is driven to slide on the support rod 3, so that the friction block 4 is closer to the take-up roller 2, increasing the friction force to offset the wear. During the adjustment of friction block 4, a tension gauge can be used to assist in adjusting the position of friction block 4.

[0068] In this embodiment: a groove 31 extending in the length direction of the support rod 3 is provided on the side of the support rod 3 facing the winding roller 2; one end of the friction block 4 is inserted into the groove 31 and slidably engaged, and the other end extends out of the groove 31.

[0069] The adjusting part includes a lead screw 32 that extends along the length of the support rod 3 and is embedded in the slide groove 31. One end of the lead screw 32 extends out of the support rod 3 through the inner wall of the slide groove 31 and is rotatably engaged with the support rod 3. The other end of the lead screw 32 passes through the friction block 4 and is connected by a threaded engagement.

[0070] In this design, the friction block 4 is embedded in the groove 31 and can only slide along the length of the support rod 3. Limit pins are inserted at both ends of a section of the lead screw 32 within the inner wall of the groove 31 to restrict the axial sliding of the lead screw 32. The lead screw 32 is threadedly connected to the friction block 4. By simply rotating one end of the lead screw 32 outside the support rod 3, the friction block 4 can be driven to slide within the groove 31, thus adjusting the position of the friction block 4.

[0071] The end face of the take-up roller 2 has a cylindrical slot coaxial with the take-up roller 2. The friction block 4 is inserted into the slot at the end facing away from the support rod 3. One side of the friction block 4 is adapted to and abuts against the inner circular surface of the slot. This allows the friction block 4 to be stored inside the support rod 3 and the take-up roller 2, improving the flatness of the device and facilitating operation.

[0072] In this embodiment: the friction block 4 includes a friction plate 41, a compression spring 42 and a slider 43. The friction plate 41 and the slider 43 are both slidably engaged with the slide groove 31. The lead screw 32 passes through the slider 43 and is connected by a threaded engagement.

[0073] The compression spring 42 is sleeved outside the middle of the lead screw 32. One end of the compression spring 42 abuts against the friction plate 41, and the other end abuts against the slider 43. When the compression spring 42 is in its naturally extended state, the friction plate 41 abuts against the winding roller 2.

[0074] In this design, the compression spring 42 provides elastic support to the friction plate 41, ensuring that the friction plate 41 and the take-up roller 2 remain in contact, thus providing frictional resistance. Simultaneously, the slider 43 is slidably fitted within the groove 31. The position of the slider 43 can be adjusted by rotating the lead screw 32, thereby changing the deformation of the compression spring 42 and consequently altering the magnitude of the frictional force.

[0075] In this embodiment: one end of the belt 1 is detachably fixed to the outer circular surface of one end of the take-up roller 2, and the other end is spirally wound around the outside of the take-up roller 2 along the axial direction of the take-up roller 2.

[0076] In this design, a threaded hole is provided on the outer surface of one end of the take-up roller 2. By inserting the threaded end of the locking bolt through the end of the belt body 1 into the threaded hole and connecting it with the thread, the belt body 1 can be detached. When the gas pipeline winding work is about to be completed, the belt body 1 can be removed so that the entire belt body is wound around the gas pipeline. At the same time, a new belt body 1 can be installed for secondary winding work, or for the next winding work.

[0077] Furthermore, the belt 1 is spirally wound around the take-up roller 2, and when fully extended, it is in a straight line and forms a certain angle with the axis of the take-up roller 2. With the belt 1 fully extended, the free end of the belt 1 is fixed to the gas pipeline and tightened. By simply rotating the belt 1 around the gas pipeline, the belt 1 can be spirally wound onto the gas pipeline. Moreover, the take-up roller 2 is rotatably connected to the support rod 3, allowing the belt 1 to be freely extended.

[0078] Therefore, while restricting the device from moving axially within the gas pipeline, the take-up roller 2 revolves around the gas pipeline, and the belt 1 automatically unfolds from the take-up roller 2 and synchronously spirals around the outside of the gas pipeline.

[0079] In this embodiment: a limiting groove 21 is provided on the outer circular surface of the take-up roller 2, which extends spirally toward the axial direction of the take-up roller 2, and the belt body 1 is embedded in the limiting groove 21.

[0080] In this design, the limiting groove 21 is used to restrict the sliding of the belt 1 along the axial direction of the take-up roller 2. The width of the limiting groove 21 is smaller than the width of the belt 1, so that the belt 1 is partially embedded in the limiting groove 21, while the remaining part protrudes beyond the outer surface of the take-up roller 2. Taking one loop of belt 1 as an example, the part of the belt 1 embedded in the limiting groove 21 can be covered by the protruding part of the next loop of belt 1, making the belt 1 tightly wound and more stable.

[0081] In addition, a special take-up roller 2 can be set according to the diameter of the gas pipeline being inspected, so that the outer diameter of the special take-up roller 2 is equal to the outer diameter of the gas pipeline, and the pitch of the limiting groove 21 is the pitch of the tape 1 winding on the gas pipeline. No separate adjustment is required during use, simplifying the operation steps and reducing the difficulty of operation.

[0082] In this embodiment: a rotating shaft 22 is coaxially rotatably fitted inside the take-up roller 2, both ends of the rotating shaft 22 extend out of the take-up roller 2, and both ends of the rotating shaft 22 are fixedly connected to a support rod 3.

[0083] In this design, the take-up roller 2 is supported by two support rods 3 and a rotating shaft 22, making the take-up roller 2 more stable. Each support rod 3 is equipped with a connecting part, which can be placed at both ends of the gas pipeline leak point to facilitate the wrapping and sealing of the leak point by the belt 1.

[0084] In this embodiment: the connecting part includes a fixed strip 51 and a movable strip 52 in the shape of an arc, and the central angle of the fixed strip 51 and the movable strip 52 is less than or equal to 180 degrees;

[0085] The outer circular surface of the fixing strip 51 is fixedly connected to the end of the support rod 3 facing away from the winding roller 2, and the axis of the fixing strip 51 is parallel to the axis of the winding roller 2.

[0086] The movable strip 52 and the fixed strip 51 are coaxially rotatably connected, and the inner diameter of the movable strip 52 is equal to the inner diameter of the fixed strip 51. A limiting part for restricting the rotation of the movable strip 52 is provided between the movable strip 52 and the fixed strip 51.

[0087] In this design, the inner diameters of both the fixed strip 51 and the movable strip 52 are equal to the outer diameter of the gas pipeline. The inner circular surface of the fixed strip 51 and the outer circular surface of the movable strip 52 simultaneously fit against the outer circular surface of the gas pipeline, enabling the device to revolve around the gas pipeline and perform the winding operation of the belt 1.

[0088] The central angle of the movable strip 52 is smaller than that of the fixed strip 51. The movable strip 52 can be rotated and stored on the fixed strip 51, leaving the fixed strip 51 open. Because the central angle of the fixed strip 51 is less than 180 degrees, the fixed strip 51 can be easily secured to or removed from the gas pipeline. When the movable strip 52 is rotated out from the fixed strip 51, its overall central angle is greater than 180 degrees, restricting the device from radial movement on the gas pipeline, allowing only revolution, thus improving the stability of the winding operation.

[0089] In this embodiment: an arc-shaped groove 511 is provided on the inner circular surface of the fixed strip 51, and the movable strip 52 is embedded in the arc-shaped groove 511 and slides in fit;

[0090] The fixed strip 51 has an insertion hole 512 with a connecting arc groove 511 on its outer circular surface, and the movable strip 52 has a limiting hole 521 on its outer circular surface. After the movable strip 52 slides out from the fixed strip 51, the limiting hole 521 is opposite to the insertion hole 512, and when the limiting hole 521 is opposite to the insertion hole 512, the central angle of the movable strip 52 and the fixed strip 51 as a whole is greater than 180 degrees.

[0091] The limiting part includes a pin 53, one end of which is inserted into the insertion hole 512 and the limiting hole 521 in sequence to be in a plugged state.

[0092] In this design, the movable strip 52 is embedded in the arc-shaped groove 511, making the structure of the movable strip 52 and the fixed strip 51 more compact. The pin 53 is simultaneously inserted into the insertion hole 512 and the limiting hole 521, which can restrict the rotation of the movable strip 52 on the fixed strip 51, keep the movable strip 52 in a stable extended state, lock the gas pipe, prevent the gas pipe from moving out of the fixed strip 51, and stably carry out the winding work of the belt 1.

[0093] The insertion hole 512 can be inserted into the insertion hole 512 and the limiting hole 521 by interference fit, and the friction force can be used to limit the sliding of the pin 53 along the axis; or, the pin 53 can be connected to the insertion hole 512 by threaded fit. When the limiting hole 521 and the insertion hole 512 are opposite, the pin 53 can be driven into the limiting hole 521 by rotating one end of the fixing bar 51. When the limiting hole 521 and the insertion hole 512 are not opposite, the end of the pin 53 can be fixed against the outer circle surface of the movable bar 52 by tightening the pin 53.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A natural gas pipeline leak repair device, comprising a belt (1), characterized in that: It also includes a take-up roller (2) for winding and storing the tape body (1), the end of the take-up roller (2) is provided with a support rod (3), one end of the support rod (3) is rotatably connected to the take-up roller (2) about the axis of the take-up roller (2), and the other end extends radially toward the take-up roller (2); The support rod (3) has a connecting part for wrapping the gas pipeline in a ring at one end facing away from the winding roller (2), and its axis is parallel to the axis of the winding roller (2).

2. The natural gas pipeline leak repair device according to claim 1, characterized in that: The support rod (3) has a friction block (4) on a plane facing the take-up roller (2), and the friction block (4) abuts against the take-up roller (2).

3. The natural gas pipeline leak repair device according to claim 2, characterized in that: The friction block (4) is slidably connected to the support rod (3) along the length of the support rod (3), and the end of the take-up roller (2) facing the support rod (3) is located on the movement trajectory of the friction block (4); The support rod (3) is provided with an adjustment part for driving the friction block (4) to slide on the support rod (3).

4. The natural gas pipeline leak repair device according to claim 3, characterized in that: The support rod (3) has a groove (31) extending in the length direction of the support rod (3) on the side facing the take-up roller (2). One end of the friction block (4) is inserted into the groove (31) and slidably engaged, while the other end extends out of the groove (31). The adjustment part includes a lead screw (32) that extends along the length of the support rod (3) and is embedded in the slide groove (31). One end of the lead screw (32) extends out of the support rod (3) through the inner wall of the slide groove (31) and is rotatably engaged with the support rod (3). The other end of the lead screw (32) passes through the friction block (4) and is connected by a threaded engagement.

5. The natural gas pipeline leak repair device according to claim 4, characterized in that: The friction block (4) includes a friction plate (41), a compression spring (42), and a slider (43). The friction plate (41) and the slider (43) are both slidably engaged with the groove (31). The lead screw (32) passes through the slider (43) and is connected by a threaded engagement. The compression spring (42) is sleeved outside the middle of the lead screw (32). One end of the compression spring (42) abuts against the friction plate (41), and the other end abuts against the slider (43). When the compression spring (42) is in its naturally extended state, the friction plate (41) abuts against the winding roller (2).

6. The natural gas pipeline leak repair device according to claim 1, characterized in that: One end of the belt (1) is detachably fixed to the outer surface of one end of the take-up roller (2), and the other end is spirally wound around the outside of the take-up roller (2) along the axial direction.

7. The natural gas pipeline leak repair device according to claim 6, characterized in that: The outer circular surface of the take-up roller (2) is provided with a limiting groove (21) that extends spirally toward the axial direction of the take-up roller (2), and the belt (1) is embedded in the limiting groove (21).

8. The natural gas pipeline leak repair device according to claim 1, characterized in that: The take-up roller (2) is coaxially rotatably fitted with a rotating shaft (22), both ends of which extend out of the take-up roller (2), and both ends of the rotating shaft (22) are fixedly connected to a support rod (3).

9. The natural gas pipeline leak repair device according to claim 1, characterized in that: The connecting part includes a fixed strip (51) and a movable strip (52) in the shape of an arc, and the central angle of the fixed strip (51) and the movable strip (52) is less than or equal to 180 degrees. The outer surface of the fixing strip (51) is fixedly connected to the end of the support rod (3) facing away from the winding roller (2), and the axis of the fixing strip (51) is parallel to the axis of the winding roller (2); The movable strip (52) is rotatably connected to the fixed strip (51) on the same axis, and the inner diameter of the movable strip (52) is equal to the inner diameter of the fixed strip (51). A limiting part for restricting the rotation of the movable strip (52) is provided between the movable strip (52) and the fixed strip (51).

10. The natural gas pipeline leak repair device according to claim 9, characterized in that: The fixed strip (51) has an arc-shaped groove (511) on its inner circular surface, and the movable strip (52) is embedded in the arc-shaped groove (511) and slides in fit. The fixed strip (51) has an insertion hole (512) with a connecting arc groove (511) on its outer circular surface, and the movable strip (52) has a limiting hole (521) on its outer circular surface. After the movable strip (52) slides out from the fixed strip (51), the limiting hole (521) and the insertion hole (512) are opposite to each other. When the limiting hole (521) and the insertion hole (512) are opposite to each other, the central angle of the movable strip (52) and the fixed strip (51) as a whole is greater than 180 degrees. The limiting part includes a pin (53), one end of which is inserted into the insertion hole (512) and the limiting hole (521) in sequence to be in a plugged state.

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