A gas pipeline plug

Abstract

This invention provides a gas pipeline plugging device, including a base frame, a clamping and fixing assembly, and a plugging execution assembly. The clamping and fixing assembly is installed at the first end of the base frame and includes a pair of clamping arms and a first drive mechanism. The plugging execution assembly is installed at the second end of the base frame and includes a conical plug and a second drive mechanism. During the plugging operation, the pair of clamping arms are positioned on both sides of the pipeline. The first drive mechanism is operated to drive the pair of clamping arms to move closer together and clamp onto the outer circumference of the pipeline. The second drive mechanism is operated to drive the conical plug to move along the pipeline axis toward the pipe opening until it is inserted into the pipe opening, thus achieving a seal. This invention allows the clamping and fixing assembly to adapt to the outer circumferential dimensions of pipelines with different diameters, expanding the applicability of the device. The second drive mechanism drives the conical plug to move linearly along the pipeline axis, ensuring the coaxiality of the plug and the pipe opening during the plugging process. The conical surface of the conical plug can adapt to pipe openings of various diameters, and the "wedge" effect of the conical surface helps improve the sealing effect.

Description

Technical Field

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

[0002] Gas pipelines are responsible for the safe and stable transmission and distribution of gas to various users. During routine maintenance, planned replacements, or emergency repairs, it is essential to reliably and quickly temporarily seal specific pipeline sections to isolate the gas source, prevent gas leaks, and ensure the safety of construction personnel and the surrounding environment. Therefore, gas pipeline sealing devices are indispensable and critical specialized tools in pipeline maintenance and repair operations.

[0003] Currently, commonly used pipe plugs in the industry generally suffer from the following limitations in design and use: 1) Poor adaptability and insufficient versatility. Most plugs are designed for specific pipe diameters. When faced with pipes of different diameters, it is often necessary to replace the entire set of equipment, making rapid adaptation impossible. This directly leads to low equipment utilization, the need to pre-equip multiple specifications of plugs, increased equipment purchase and management costs, and also limits their application range in complex working conditions. 2) Insufficient operational reliability and stability. The plugging effect of some plugs depends on the operator's experience, resulting in long pipeline positioning and plugging times and unstable plugging effects, especially in emergency repair scenarios, which seriously affects operational efficiency.

[0004] Therefore, there is an urgent need to provide a gas pipeline plugging device that can achieve rapid operation, adapt to different pipe diameters, and provide reliable sealing. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the poor adaptability and lack of versatility of commonly used pipe plugs in the prior art. When faced with pipes of different diameters, it is often necessary to replace the entire set of equipment, which cannot achieve rapid self-adaptation. At the same time, the sealing effect of some plugs depends on the operator's experience, resulting in long pipe positioning and sealing time and unstable sealing effect. Therefore, this utility model provides a gas pipeline plug that can achieve rapid operation, adapt to different pipe diameters, and has reliable sealing.

[0006] Therefore, this utility model provides a gas pipeline plugging device, comprising: Base frame; The clamping and fixing assembly is installed at the first end of the base frame and includes a pair of opposing clamping arms and a first driving mechanism for driving the pair of clamping arms to move closer or further apart, for adaptively clamping and fixing to the outer periphery of the pipe to be blocked; A blocking execution assembly is installed at the second end of the base frame; it includes a tapered plug and a second drive mechanism for driving the tapered plug to move linearly relative to the base frame 1; When the two clamping arms hold and fix the pipe to be blocked, the conical plug can move forward and backward along the axial direction of the pipe to be blocked under the drive of the second driving mechanism, so as to insert into or detach from the pipe opening of the pipe to be blocked.

[0007] Furthermore, the base frame 1 includes: The first support beam consists of two beams, arranged parallel to each other. There are two second support beams, one end of each of the two second support beams is fixedly connected to the two first support beams respectively; The third support beam is fixedly connected at both ends to the other ends of the two second support beams; The clamping and fixing assembly is mounted on the first support beam, and the sealing and execution assembly is mounted on the third support beam.

[0008] Furthermore, the first driving mechanism includes: Two parallel screws are rotatably mounted between two first support beams; each screw has a first threaded section and a second threaded section with opposite thread directions along its axial direction; one clamping arm is screwed into the first threaded section of each of the two screws, and the other clamping arm is screwed into the second threaded section of each of the two screws. A synchronizing component is used to connect the two screws to achieve synchronized rotation between them; And a first operating handle disposed at one end of at least one of the screws.

[0009] Furthermore, the synchronization component includes sprockets respectively fixedly sleeved on the corresponding ends of the two screws, and a chain meshing with the two sprockets.

[0010] Furthermore, the other end of the screw is provided with a locking section, on which a first locking nut is screwed.

[0011] Furthermore, the base frame also includes two parallel and opposite fourth support beams; the two ends of the two fourth support beams are respectively fixedly connected to the two first support beams and are arranged adjacent to the corresponding screws; Each of the fourth support beams is provided with a support, and the screw is provided with a support portion located between its first threaded section and second threaded section. The support portion is rotatably supported in the corresponding support to limit the axial movement of the screw.

[0012] Furthermore, the cross-sectional shape of the support portion along the axial direction of the screw is I-shaped.

[0013] Furthermore, the third support beam has a second threaded hole in its middle section. The second drive mechanism includes: A drive screw is provided along the moving direction of the tapered plug, and its shaft is screwed into the second threaded hole in the middle of the third support beam; A first connecting member is disposed at one end of the drive screw facing the first support beam; the cross-section of the connecting member along the axial direction is T-shaped; The second connector is disposed at the large end of the conical plug, and the end away from the conical plug is provided with a T-shaped mounting groove that matches the shape of the first connector. The first connector is rotatably mounted in the T-shaped mounting groove, so that the first connector can rotate relative to the second connector, and the axial movement of the first connector can push the second connector to move axially. The second operating handle is located at the end of the drive screw away from the first support beam.

[0014] Furthermore, each of the two second support beams is provided with a guide groove extending along the axial direction of the drive screw; The second connector has guide arms on both sides corresponding to the two guide grooves. The free ends of the two guide arms slide in conjunction with the two guide grooves to constrain the conical plug to move only in a straight line.

[0015] Furthermore, the working surface of the clamping arm is an arc-shaped surface adapted to the curvature of the outer wall of the pipe, and an anti-slip structure is provided in the arc-shaped surface.

[0016] The technical solution provided by this utility model has the following advantages: This utility model discloses a gas pipeline plugging device, comprising a base frame, a clamping and fixing assembly, and a plugging execution assembly. The clamping and fixing assembly is installed at the first end of the base frame and includes a pair of opposing clamping arms and a first driving mechanism for driving the pair of clamping arms to move closer or further apart, for adaptively clamping and fixing to the outer periphery of the pipeline to be plugged. The plugging execution assembly is installed at the second end of the base frame and includes a conical plug and a second driving mechanism for driving the conical plug to move linearly relative to the base frame. When the two clamping arms clamp and fix the pipeline to be plugged, the conical plug can move forward and backward along the axial direction of the pipeline to be plugged under the drive of the second driving mechanism to insert into or detach from the pipe opening of the pipeline to be plugged.

[0017] This utility model's gas pipeline plugging device, during plugging operations, first places the base frame next to the pipeline to be plugged, with a pair of clamping arms positioned on both sides of the pipeline; then operates the first drive mechanism to drive the pair of clamping arms closer together until they fit against the outer circumference of the pipeline and generate sufficient clamping force, achieving relative fixation between the pipeline and the base frame; at this time, the conical plug is coaxially aligned with the pipeline opening; then operates the second drive mechanism to drive the conical plug to move along the pipeline axis towards the opening until the conical plug is inserted into the inside of the opening, achieving a seal through the interference fit between the conical surface and the inner wall of the opening; when it is necessary to release the plugging, operate the second drive mechanism to disengage the conical plug from the opening, and then operate the first drive mechanism to move the clamping arms away from the pipeline, completing the disassembly.

[0018] This utility model of a gas pipeline plug solves the problem of existing plugs failing due to inaccurate pipeline positioning by combining a "clamping and fixing + axial plugging" structure, thus improving the reliability of plugging operations. The clamping and fixing component can adapt to the outer circumferential dimensions of pipes of different diameters, breaking the limitation of traditional plugs that are "one plug per diameter" and expanding the applicability of the device. The second drive mechanism drives the conical plug to move linearly along the pipeline axis, ensuring the coaxiality of the plug and the pipe opening during the plugging process and avoiding sealing gaps caused by misalignment. The conical surface of the conical plug can adapt to the pipe opening size of various diameters, and the "wedge" effect of the conical surface increases the contact pressure as it advances, which helps to improve the sealing effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the overall structure of the gas pipeline plugging device of this utility model.

[0021] Figure 2 This is an exploded view of the gas pipeline plugging device of this utility model.

[0022] Figure 3 This is a cross-sectional view of the gas pipeline plug of this utility model.

[0023] Reference numerals: 1. Base frame; 11. First support beam; 111. Dust cover; 12. Second support beam; 121. Guide groove; 13. Third support beam; 131. Second threaded hole; 14. Fourth support beam; 141. Support; 142. Slide groove; 15. Guide arm; 21. Clamping arm; 211. First threaded hole; 212. Straight section; 213. Bending section; 22. Screw; 221. First threaded section; 222. Second threaded section; 223. Locking section; 224. Support part; 23. Sprocket; 24. Chain; 25. First locking nut; 26. First operating handle; 31. Conical plug; 32. Drive screw; 33. Second operating handle; 35. First connector; 36. Second connector; 361. T-shaped mounting groove; 37. Second locking nut. Detailed Implementation

[0024] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0025] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0026] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0027] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] This embodiment provides a gas pipeline plugging device, such as... Figure 1-3 As shown, it includes: a base frame 1, a clamping and fixing assembly, and a sealing execution assembly; the clamping and fixing assembly is installed at the first end of the base frame 1, including a pair of opposing clamping arms 21, and a first drive mechanism for driving the pair of clamping arms 21 to move closer or further apart, for adaptively clamping and fixing to the outer periphery of the pipe to be sealed; the sealing execution assembly is installed at the second end of the base frame 1, including a conical plug 31 and a second drive mechanism for driving the conical plug 31 to move linearly relative to the base frame 1; when the two clamping arms 21 clamp and fix the pipe to be sealed, the conical plug 31 can move forward and backward along the axial direction of the pipe to be sealed under the drive of the second drive mechanism to insert into or detach from the pipe opening of the pipe to be sealed.

[0029] In this embodiment, the clamping and fixing assembly is installed at the first end of the base frame 1 near the pipe to be sealed. A pair of clamping arms 21 are initially spaced apart, with the distance between them being greater than the maximum outer diameter of the pipe to be sealed. The sealing execution assembly is installed at the second end of the base frame 1 away from the pipe. The conical plug 31 is made of an elastic sealing material, such as nitrile rubber, fluororubber, or polyurethane.

[0030] In this embodiment of the gas pipeline plugging device, during the plugging operation, the base frame 1 is first placed next to the pipeline to be plugged, with a pair of clamping arms 21 positioned on both sides of the pipeline. The first drive mechanism is operated to drive the pair of clamping arms 21 closer together until they fit against the outer circumference of the pipeline and generate sufficient clamping force, thereby achieving relative fixation between the pipeline and the base frame 1. At this time, the conical plug 31 is coaxially aligned with the pipeline opening. The second drive mechanism is operated to drive the conical plug 31 to move along the pipeline axis toward the opening until the conical plug 31 is inserted into the opening, and the seal is achieved by the interference fit between the conical surface and the inner wall of the opening. When it is necessary to remove the plugging, the second drive mechanism is operated to remove the conical plug 31 from the opening, and then the first drive mechanism is operated to move the clamping arms 21 away from the pipeline, completing the disassembly.

[0031] The gas pipeline plugging device of this embodiment solves the problem of existing plugging devices failing due to inaccurate pipeline positioning by combining a "clamping and fixing + axial plugging" structure, thus improving the reliability of the plugging operation. The clamping and fixing component can adapt to the outer circumferential dimensions of pipes of different diameters, breaking the limitation of the traditional plugging device of "one device per diameter" and expanding the applicability of the device. The second drive mechanism drives the conical plug to move linearly along the pipeline axis, ensuring the coaxiality of the plug and the pipe opening during the plugging process and avoiding sealing gaps caused by misalignment. The conical surface of the conical plug can adapt to the pipe opening size of various diameters, and the "wedge" effect of the conical surface increases the contact pressure as it advances, which helps to improve the sealing effect.

[0032] The gas pipeline plugging device of this embodiment, further, such as Figure 1 , Figure 2 As shown, the base frame 1 includes a first support beam 11, a second support beam 12, and a third support beam 13; there are two first support beams 11, which are arranged in parallel opposite directions; there are two second support beams 12, one end of each of the two second support beams 12 is fixedly connected to the two first support beams 11 respectively; both ends of the third support beam 13 are fixedly connected to the other ends of the two second support beams 12 respectively; the clamping and fixing assembly is installed on the first support beam 11, and the sealing execution assembly is installed on the third support beam 13.

[0033] In this embodiment, two parallel first support beams 11 form a horizontal base. Two second support beams 12 can be fixed vertically (or approximately vertically) at the midpoint between the two first support beams 11. A third support beam 13 is horizontally connected to the top of the two second support beams 12, forming a stable "U" or "C" shaped frame.

[0034] The gas pipeline plugging device of this embodiment, further, such as Figure 2As shown, the first drive mechanism includes two parallel screws 22 rotatably mounted between two first support beams 11; each screw 22 has a first threaded section 221 and a second threaded section 222 with opposite thread directions along its axial direction; one clamping arm 21 is screwed into the first threaded section 221 of the two screws 22 respectively, and the other clamping arm 21 is screwed into the second threaded section 222 of the two screws 22 respectively; a synchronization component is used to connect the two screws 22 to achieve synchronous rotation of the two; and a first operating handle 26 is provided at one end of at least one screw 22.

[0035] In this embodiment, two screws 22 are rotatably and parallelly mounted between two first support beams 11, and are respectively located on both sides of the two second support beams. Preferably, the two screws 22 can be symmetrically arranged about the plane containing the two second support beams. A limiting structure (e.g., bearings or bushings) is provided between the two screws 22 and the two first support beams 11, preventing the two screws 22 from moving axially and allowing only rotational movement. Each screw 22 is machined with two sections of threads with opposite directions (left-hand and right-hand). The two ends of the two clamping arms 21 corresponding to the two screws 22 are respectively provided with first threaded holes 211, and the internal threads of the first threaded holes 211 respectively mesh with the two sections of opposite threads. The outer diameters at both ends of the screws are smaller than the first threaded section 221 and the second threaded section 222, thus facilitating the installation of the two clamping arms from both ends. One end of each screw extends axially and protrudes from the first support beam 11, and is equipped with a first operating handle 26. When the operator turns the first operating handle 26, the two screws 22 will rotate synchronously (achieved through a synchronizing component). Since the first threaded section 221 and the second threaded section 222 of the screw 22 rotate in opposite directions, and the two clamping arms 21 are respectively engaged with threaded sections of different directions, when the screw rotates, the two clamping arms 21 will produce a linear motion along the screw axis that moves relatively closer or relatively farther away. When the clamping arms 21 approach the pipe and fit against its outer circumference, continue to turn the handle to make the clamping arms generate sufficient clamping force to fix the pipe. When the handle is turned in the opposite direction, the two clamping arms 21 will move away from each other at the same time, releasing the pipe.

[0036] The gas pipeline plugging device of this embodiment, further, such as Figure 2 As shown, the synchronization component includes sprockets 23 respectively fixedly sleeved on the corresponding ends of the two screws 22, and chains 24 meshing with the two sprockets 23.

[0037] In this embodiment, a sprocket 23 is fixed to one end of each of the two screws 22, where a first operating handle 26 is installed. The two sprockets 23 have the same specifications and number of teeth, and are connected by a closed chain 24. A dust cover 111 can be provided on the outside of the sprockets and the chain to prevent dust and oil from the construction site from affecting the transmission effect. When the operator rotates the first operating handle 26 on one of the screws 22, the sprocket 23 at the end of that screw rotates accordingly. Since the chain 24 meshes with the two sprockets 23, the rotation of the driving sprocket is transmitted to the driven sprocket through the chain, driving the other screw 22 to rotate synchronously. The meshing characteristics of the chain drive ensure that the rotational angular velocities of the two screws are the same, thereby realizing the synchronous movement of the two clamping arms 21.

[0038] In this embodiment of the gas pipeline plugger, the other end of the screw 22 is further provided with a locking section 223, on which a first locking nut 25 is screwed.

[0039] In this embodiment, the other end of the screw 22 (i.e., the end without the first operating handle 26) extends to form a locking section 223. This locking section 223 passes through the first support beam 11 or its bearing seat and protrudes outwards. The outer diameter of the locking section 223 is smaller than the working thread section of the screw (i.e., the first thread section 221 and the second thread section 222), and it is machined with threads for assembly. The first locking nut 25 is screwed onto the protruding portion of the locking section 223. Its working principle and function are as follows: When the clamping arm 21 clamps the pipe into position, the first locking nut 25 is tightened, causing its end face to press tightly against the outer surface of the first support beam 11 (or bearing seat). At this time, a huge static friction force is generated between the first locking nut 25 and the first support beam 11, making it difficult for the nut to rotate. When the device attempts to drive the screw 22 to rotate in the direction of loosening the clamping arms (even if the two clamping arms are moving away from each other) due to external vibration or pipeline stress, the relative rotation of the screw 22 on the locking section 223, pre-tightened by the first locking nut 25, will, through the mechanical relationship of the threaded pair, transform into a tendency for the first locking nut 25 to further axially press against the first support beam 11. This tendency will not loosen the nut but will instead enhance its locking effect, thereby effectively preventing the screw 22 from rotating unexpectedly and ensuring the stability of the clamping state. When it is necessary to actively loosen the clamping arms 21, the first locking nut 25 must first be manually loosened in the opposite direction to release the clamping force and self-locking effect between it and the first support beam 11 before the first operating handle 26 can be operated to drive the screw 22 to reverse.

[0040] Preferably, the end face of the first locking nut 25 facing the first support beam 11 may be provided with anti-slip texture, or a spring washer may be provided between the first locking nut 25 and the first support beam 11, and the elastic deformation of the spring washer may prevent the first locking nut from loosening.

[0041] The gas pipeline plugging device of this embodiment, further, such as Figure 1 , Figure 2 As shown, the base frame 1 also includes two parallel and opposite fourth support beams 14; the two ends of the two fourth support beams 14 are respectively fixedly connected to the two first support beams 11 and are arranged adjacent to the corresponding screws 22; each fourth support beam 14 is provided with a support 141, and the screw 22 is provided with a support portion 224 located between its first threaded section 221 and second threaded section 222, the support portion 224 is rotatably supported in the corresponding support 141 to restrict the axial movement of the screw 22.

[0042] In this embodiment, the two ends of the two fourth support beams 14 are fixedly connected to the two first support beams 11 respectively. The two fourth support beams 14 are arranged adjacent to the corresponding screws 22. The two fourth support beams 14 are arranged parallel to the screws 22 and located between the two first support beams 11. The two ends of each fourth support beam 14 are fixedly connected to the two first support beams 11 respectively, thereby providing an additional support point directly below (or to the side) each screw 22. Specifically, each fourth support beam 14 is provided with a support 141. The screw 22 is provided with a support portion 224 located between its first threaded section 221 and second threaded section 222. The support portion 224 is rotatably supported in the corresponding support 141 to restrict the axial movement of the screw 22. The support 141 provides a low-friction rotary interface (e.g., through a bearing or bushing) for the support portion 224. When the screw 22 rotates, the screw 22 is restricted in its overall axial direction (along the direction of the screw itself) through the cooperation of the support 224 and the support 141, ensuring that the screw can only rotate around its own axis and will not move axially. Alternatively, the fourth support beam 14 can also be designed as a hollow structure in the middle. Specifically, the fourth support beam 14 has an axially extending groove 142 in the middle, the support 141 is located in the middle of the groove 142, the screw 22 is located in the groove 142, and the two ends of the clamping arm 21 can slide and engage with the groove 142. The groove 142 can guide the clamping arm 21 to ensure the accuracy of the movement path.

[0043] The gas pipeline plugging device of this embodiment, further, such as Figure 2 As shown, the cross-sectional shape of the support portion 224 along the axial direction of the screw 22 is I-shaped.

[0044] In this embodiment, the I-shaped structure of the support 224 forms an axial limiting fit with the support 141. The support 224 is locked in the groove of the support 141 and can rotate but cannot move axially. When the handle is turned to drive the screw to rotate, the rotational motion of the screw is completely converted into the linear movement of the clamping arm 21 on the screw.

[0045] In this embodiment of the gas pipeline plug, the third support beam 13 has a second threaded hole 131 in the middle, and the second driving mechanism includes a driving screw 32, a first connector 35, a second connector 36, and a second operating handle 33. The driving screw 32 is arranged along the moving direction of the tapered plug 31, and its shaft is screwed to the second threaded hole 131 in the middle of the third support beam 13. The first connector 35 is disposed at the end of the driving screw 32 facing the first support beam 11. The cross-section of the connector 35 in the axial direction is T-shaped. The second connector 36 is disposed at the large end of the conical plug 31, and the end away from the conical plug 31 is provided with a T-shaped mounting groove 361 that matches the shape of the first connector 35. The first connector 35 is rotatably mounted in the T-shaped mounting groove 361, so that the first connector 35 can rotate relative to the second connector 36, and the axial movement of the first connector 35 can push the second connector 36 to move axially. The second operating handle 33 is disposed at the end of the drive screw 32 away from the first support beam 11.

[0046] In this embodiment, as Figure 2 , Figure 3 As shown, the drive screw 32 engages with the threaded hole 131 on the third support beam 13. The drive screw 32 is connected to the conical plug 31 through a "T-shaped shaft-T-shaped groove" structure, which achieves the characteristic of "rotational capability, but also axial movement transmission". Rotating the second operating handle 33 causes the drive screw 32 to rotate within the threaded hole 131 of the third support beam 13 and generate axial movement. Since the first connecting piece 35 is rotatably mounted in the T-shaped mounting groove 361 of the second connecting piece 36, the rotation of the drive screw 32 does not cause the second connecting piece 36 and the conical plug 31 to rotate; it only transmits axial movement to the conical plug 31. The T-shaped structure restricts the axial separation of the first connecting piece 35 and the second connecting piece 36, ensuring that the axial force of the drive screw can be effectively transmitted to the conical plug, thereby causing the conical plug 31 to move along a straight axial direction, completing the insertion or disengagement operation of the pipe.

[0047] Furthermore, a second locking nut 37 is screwed onto the drive screw 32. After the conical plug 31 is in place, the second locking nut 37 is rotated to move along the thread of the drive screw toward the third support beam 13 until it is tightly pressed against the third support beam 13, thereby forming a mechanical interlock. At this time, the axial preload generated by the second locking nut 37 locks the rotation of the drive screw, thereby preventing it from rotating unexpectedly and ensuring the reliability of the conical plug 31 sealing.

[0048] Preferably, the end face of the second locking nut 37 facing the third support beam 13 may be provided with anti-slip texture, or a spring washer may be provided between the second locking nut 37 and the third support beam 13, and the elastic deformation of the spring washer may prevent the second locking nut 37 from loosening.

[0049] The gas pipeline plugging device of this embodiment, further, such as Figure 1 , Figure 2 As shown, the two second support beams 12 are respectively provided with guide grooves 121 extending along the axial direction of the drive screw 32; the two sides of the second connector 36 are respectively provided with guide arms 15 corresponding to the two guide grooves 121, and the free ends of the two guide arms 15 are respectively slidably engaged with the two guide grooves 121 to constrain the conical plug 31 to move only in a straight line.

[0050] In this embodiment, the end of the guide arm 15 is embedded in the guide groove 121, and the two are in sliding engagement. The sliding engagement between the guide arm 15 and the guide groove 121 forms a guide rail system. Even if the drive screw 32 has slight radial runout or irregularity during rotation, the sliding engagement of the guide arm 15 in the guide groove 121 will provide restraint, ensuring that the entire conical plug 31 and its connecting components can only move along a preset straight line (i.e., the axial direction of the drive screw 32), and cannot deflect or move laterally.

[0051] In this embodiment of the gas pipeline plugger, the working surface of the clamping arm 21 is an arc-shaped surface adapted to the curvature of the outer wall of the pipeline, and an anti-slip structure is provided in the arc-shaped surface.

[0052] In this embodiment, as Figure 2 As shown, the inner surface of the clamping arm 21 that contacts the pipe is machined into an arc shape that matches the outer diameter of common pipes. Rubber pads can be inlaid on this arc-shaped surface, anti-slip patterns can be engraved, or serrated grooves can be machined. When the clamping arm 21 approaches the pipe, the arc-shaped working surface fits against the outer wall of the pipe, increasing the contact area and allowing the clamping force to be transmitted to the pipe more evenly. Under the action of the clamping force, the rubber pad layer undergoes elastic deformation, filling the tiny depressions on the outer wall of the pipe and improving the tightness of the fit. At the same time, the elasticity of the rubber pad layer prevents the clamping arm from causing hard damage to the outer wall of the pipe.

[0053] Furthermore, the clamping arm 21 may include a straight section 212 and a curved section 213 connected to the middle of the straight section. The curved section has the arc-shaped surface formed on the side away from the straight section, and the two ends of the straight section are provided with first threaded holes 211.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A gas pipeline plugging device, characterized in that, include: Base frame (1); The clamping and fixing assembly is installed at the first end of the base frame (1) and includes a pair of oppositely arranged clamping arms (21) and a first driving mechanism for driving the pair of clamping arms (21) to move closer or further away from each other, for adaptively clamping and fixing to the outer periphery of the pipe to be blocked; A blocking execution assembly is installed at the second end of the base frame (1); it includes a conical plug (31) and a second drive mechanism for driving the conical plug (31) to move linearly relative to the base frame (1); When the two clamping arms (21) clamp and fix the pipe to be blocked, the conical plug (31) can move forward and backward along the axial direction of the pipe to be blocked under the drive of the second driving mechanism to insert into or detach from the pipe opening of the pipe to be blocked.

2. The gas pipeline plugging device according to claim 1, characterized in that, The base frame (1) includes: The first support beam (11) consists of two beams, which are arranged in parallel opposite directions; There are two second support beams (12), and one end of each second support beam (12) is fixedly connected to the two first support beams (11); The third support beam (13) is fixedly connected at both ends to the other ends of the two second support beams (12); The clamping and fixing assembly is mounted on the first support beam (11), and the sealing execution assembly is mounted on the third support beam (13).

3. The gas pipeline plugging device according to claim 2, characterized in that, The first driving mechanism includes: Two parallel screws (22) are rotatably mounted between two first support beams (11); each screw (22) has a first threaded section (221) and a second threaded section (222) with opposite thread directions along its axial direction; one clamping arm (21) is screwed into the first threaded section (221) of the two screws (22) respectively, and the other clamping arm (21) is screwed into the second threaded section (222) of the two screws (22) respectively; A synchronizing component is used to connect the two screws (22) to achieve synchronous rotation between them; And a first operating handle (26) provided at one end of at least one of the screws (22).

4. The gas pipeline plugging device according to claim 3, characterized in that, The synchronization component includes sprockets (23) respectively fixedly sleeved on the corresponding ends of the two screws (22), and chains (24) meshing with the two sprockets (23).

5. The gas pipeline plugging device according to claim 3, characterized in that, The other end of the screw (22) is also provided with a locking section (223), on which a first locking nut (25) is screwed.

6. The gas pipeline plugging device according to claim 3, characterized in that, The base frame (1) also includes two parallel and opposite fourth support beams (14); the two ends of the two fourth support beams (14) are respectively fixedly connected to the two first support beams (11) and are arranged adjacent to the corresponding screws (22); Each of the fourth support beams (14) is provided with a support (141), and the screw (22) is provided with a support part (224) located between its first threaded section (221) and second threaded section (222). The support part (224) is rotatably supported in the corresponding support (141) to restrict the axial movement of the screw (22).

7. The gas pipeline plugging device according to claim 6, characterized in that, The cross-sectional shape of the support part (224) along the axial direction of the screw (22) is I-shaped.

8. The gas pipeline plugging device according to claim 2, characterized in that, The third support beam (13) has a second threaded hole (131) in the middle. The second drive mechanism includes: The drive screw (32) is arranged along the moving direction of the tapered plug (31), and its body is screwed to the second threaded hole (131) in the middle of the third support beam (13); The first connector (35) is disposed at one end of the drive screw (32) facing the first support beam (11); the cross section of the connector (35) in the axial direction is T-shaped; The second connector (36) is disposed at the large end of the conical plug (31), and the end away from the conical plug (31) is provided with a T-shaped mounting groove (361) that is adapted to the shape of the first connector (35). The first connector (35) is rotatably mounted in the T-shaped mounting groove (361), so that the first connector (35) can rotate relative to the second connector (36), and the axial movement of the first connector (35) can push the second connector (36) to move axially. The second operating handle (33) is located at the end of the drive screw (32) away from the first support beam (11).

9. The gas pipeline plugging device according to claim 8, characterized in that, The two second support beams (12) are respectively provided with guide grooves (121) extending along the axial direction of the drive screw (32); The second connector (36) has guide arms (15) on both sides corresponding to the two guide grooves (121). The free ends of the two guide arms (15) are slidably engaged with the two guide grooves (121) to constrain the conical plug (31) to move only in a straight line.

10. The gas pipeline plugging device according to claim 1, characterized in that, The working surface of the clamping arm (21) is an arc-shaped surface that matches the curvature of the outer wall of the pipe, and an anti-slip structure is provided in the arc-shaped surface.

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