Temporary plugging device for pipeline sealing performance detection

Abstract

The invention provides a temporary plugging device for pipeline sealing performance detection, and relates to the field of pipeline sealing, and the temporary plugging device comprises a mounting rack which comprises a connecting part and a plurality of mounting parts, and the plurality of mounting parts are uniformly distributed on the peripheral side of the connecting part in a radial pattern with the connecting part as the center; the multiple clamping devices are in one-to-one correspondence with the connecting parts, are arranged at the ends, away from the mounting part, of the connecting parts and are used for fixing the mounting frame to the port of the to-be-detected pipeline; the blocking plate is the same as the section of the pipeline to be detected in shape, an annular groove is formed in the peripheral side of the blocking plate, and the blocking plate is connected with the connecting part; the annular sealing bag is made of an elastic material, is arranged in the annular groove and is used for sealing a gap between the plugging plate and the to-be-detected pipeline; and the expansion driving device is arranged between the plugging plate and the mounting frame and is used for injecting an expansion medium into the annular sealing bag. The air bag sealing device has the flexibility of air bag sealing and the stability of mechanical sealing.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline detection, and in particular to a temporary blocking device for pipeline sealing detection. Background Art

[0002] Pipeline sealing testing is a key step in construction acceptance in the fields of municipal engineering, petrochemicals, water supply and drainage systems, etc. Traditional testing methods mainly include full water tests and air tightness tests, which judge whether there is leakage in the pipeline by observing water level changes or pressure decay. In municipal water supply and drainage projects, strict sealing tests must be carried out after the pipeline is installed to ensure that no leakage occurs during long-term use, avoiding waste of water resources or environmental pollution. In oil and natural gas pipelines, sealing testing is directly related to production safety, and any minor leaks may cause serious accidents. As urban underground pipeline networks become increasingly complex and pipeline diameters continue to increase, higher requirements are placed on sealing detection technology. It is usually necessary to temporarily seal the pipeline outlet to detect the overall sealing of the pipeline.

[0003] Currently, common pipe sealing technologies are categorized into two main types: mechanical sealing and airbag sealing. Mechanical sealing typically utilizes flanged blind plates or bolted structures, achieving a seal by aligning a rigid sealing surface with the pipe end. This method is suitable for large-diameter, high-pressure pipelines. Airbag sealing, on the other hand, utilizes a rubber balloon that inflates and forms a tight contact with the pipe's inner wall. Airbag sealing offers strong adaptability and easy installation, making it widely used in low- and medium-pressure pipeline inspections.

[0004] Existing sealing technologies suffer from the following issues: First, sealing reliability is insufficient, especially under high pressure or large pipe diameters. Traditional airbags are prone to axial movement under high pressure, and mechanical seals require extremely high precision machining of the pipe end faces, so even the slightest deviation can lead to leakage. Second, while airbag sealing is relatively portable, it requires supporting equipment such as an air compressor, making it extremely inconvenient for outdoor operations. These issues severely impact the efficiency and accuracy of pipeline inspections, necessitating the development of new sealing devices to address them. Summary of the Invention

[0005] In order to improve the problem of difficulty in achieving both flexibility and stability during temporary sealing of pipelines, the present application provides a temporary sealing device for pipeline sealing detection.

[0006] The temporary blocking device for pipeline sealing detection provided in this application adopts the following technical solution: Temporary blocking device for pipeline tightness detection, including: The mounting frame includes a connecting portion and a plurality of mounting portions, wherein the plurality of mounting portions are evenly distributed radially around the connecting portion from the center of the connecting portion; A plurality of clamping devices are provided and correspond one to one with the connecting portion, and are arranged at one end of the connecting portion away from the mounting portion, and are used to fix the mounting frame to the port of the pipeline to be tested; The plugging plate has the same cross-sectional shape as the pipe to be tested, and has an annular groove formed on its circumference, connected to the connecting portion; An annular sealing bag, made of elastic material, is disposed in the annular groove and is used to seal the gap between the sealing plate and the pipeline to be tested; The expansion drive device is arranged between the sealing plate and the mounting frame and is used for injecting an expansion medium into the annular sealing bag.

[0007] Furthermore, the expansion drive device includes: a cylinder body, fixedly connected to the connecting portion; a piston plate slidably disposed inside the cylinder body, dividing the cylinder body into a sealed chamber containing an expansion medium and an open chamber communicating with the outside; an expansion communication component, disposed on the cylinder body, for passing the expansion medium in the sealing cavity into the annular sealing bag; The sliding drive assembly is arranged on the connecting portion and is used to push the piston plate to slide toward the sealing cavity.

[0008] Furthermore, a connecting rod is provided between the blocking plate and the piston plate, one end of the connecting rod is fixedly connected to the piston plate, and the other end is fixedly connected to the blocking plate, and the sealing cavity is located on a side of the blocking plate close to the connecting rod.

[0009] Furthermore, the expansion communication component includes a plurality of connecting pipes, one end of the connecting pipe is connected to the sealing cavity, and the other end is connected to the annular sealing bag.

[0010] Furthermore, a plurality of avoidance gaps are provided on the side wall of the blocking plate, the avoidance gaps are communicated with the annular groove, and the connecting pipe is communicated with the annular sealing bag through the avoidance gaps.

[0011] Furthermore, the sliding drive assembly includes a driving screw and a threaded barrel, and the threaded barrel is located on the side of the connecting part away from the cylinder body; the driving screw is threadedly connected to the threaded barrel, and its end passes through the connecting part and the cylinder body to push the piston plate to slide close to the sealing chamber.

[0012] Furthermore, the clamping device includes a clamping bracket, a clamping plate and a clamping drive, the clamping bracket is fixedly connected to the mounting portion, two clamping plates are provided and both are slidably arranged on the clamping bracket, and the clamping drive is used to drive the two clamping plates to move closer to or away from each other.

[0013] Furthermore, the clamping drive includes two clamping screws, which are threadedly connected to the clamping bracket and have ends rotatably connected to the clamping plate, and one side of the clamping plate is always attached to the clamping bracket.

[0014] Furthermore, a compression spring is provided between the clamping plate and the clamping bracket, and the compression spring is used to drive the clamping plate to slide close to the other clamping plate.

[0015] Furthermore, elastic pads are provided on one side of the two clamping plates close to each other.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. A mounting frame is provided, and multiple clamping devices are arranged on the periphery of the mounting frame in an emitting manner, so that the mounting frame can be stably fixed at the port of the pipeline to be tested. A sealing plate is provided on one side of the mounting frame, and an annular groove is provided on the periphery of the sealing plate to accommodate an annular sealing bag. A filling medium is injected into the annular sealing bag through an expansion drive device, causing the annular sealing bag to expand and fill the gap between the sealing plate and the pipeline to be tested, and to adhere tightly to the inner wall of the pipeline to be tested, thereby sealing the pipeline to be tested. The airbag seal is combined with the mechanical seal, which has both the flexibility of the airbag seal and the stability of the mechanical seal. 2. A connecting rod is provided between the sealing plate and the piston plate, so that the sealing plate can slide together with the piston plate; when the sliding drive assembly pushes the piston plate to squeeze the expansion medium in the sealing chamber to flow to the annular sealing bag, forming a preliminary seal, at this time, the sealing plate is limited by the sliding drive assembly in the direction toward the mounting frame, and the sealing plate is floating in the direction away from the mounting frame. As the external water pressure of the sealing test gradually increases, the sealing plate has a tendency to move away from the mounting frame. When the sealing plate is pushed by the external pressure and moves toward the inside of the pipeline to be tested, the piston plate will move synchronously and squeeze the expansion medium in the sealing chamber to increase the internal pressure of the annular sealing bag, thereby increasing the friction between it and the inner wall of the pipeline, thereby realizing the function of adaptive adjustment; 3. The clamping device uses two independent clamping plates and two clamping screws to independently control the movement of the two clamping plates, which can flexibly adjust the position of the two clamping plates and has a large ability to adapt to errors. In addition, a compression spring is set between the clamping plate and the clamping bracket to prevent the thread from loosening, thereby improving the stability of the clamping device when clamping the pipe to be tested, thereby improving the fixing stability of the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the usage status of an embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 3 It is a structural schematic diagram of the blocking plate of an embodiment of the present application.

[0021] Figure 4 It is a cross-sectional view of an embodiment of the present application.

[0022] Figure 5 It is a structural schematic diagram of the connecting device of an embodiment of the present application.

[0023] Figure numerals: 1. Mounting frame; 11. Connecting part; 12. Mounting part; 2. Clamping device; 21. Clamping bracket; 22. Clamping plate; 23. Clamping screw; 24. Compression spring; 25. Elastic pad; 3. Sealing plate; 31. Annular groove; 32. Avoidance gap; 33. Connecting rod; 4. Annular sealing bag; 5. Expansion drive device; 51. Cylinder body; 52. Piston plate; 53. Sliding drive assembly; 531. Drive screw; 532. Threaded barrel; 54. Connecting pipe; 6. Pipeline to be tested. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] The embodiment of the present application discloses a temporary blocking device for pipeline sealing detection. Figure 1 , the temporary blocking device for pipeline sealing detection includes: The mounting frame 1 includes a connecting portion 11 and a plurality of mounting portions 12. The connecting portion 11 is a circular plate, and the mounting portion 12 is a rectangular plate. The connecting portion 11 and the mounting portion 12 are integrally formed. The plurality of mounting portions 12 are radially and evenly distributed around the connecting portion 11 with the connecting portion 11 as the center. The clamping devices 2 are provided in multiple numbers and correspond one to one with the connecting portion 11. They are arranged at the end of the connecting portion 11 away from the mounting portion 12 and on one side of the connecting portion 11, and are used to fix the mounting frame 1 to the port of the pipe to be tested 6. In this embodiment, the mounting portion 12 and the clamping devices 2 are provided in five groups, evenly distributed around the side of the connecting portion 11, and distributed in a "five-pointed star" shape, so that the connection between the clamping devices 2 and the pipe to be tested 6 has a high stability. The blocking plate 3 has the same cross-sectional shape as the pipe to be tested 6 and has an annular groove 31 formed on its circumference, connected to the connecting portion 11 and located on the same side of the mounting frame 1 as the clamping device 2; The annular sealing bag 4 is made of elastic material and is sleeved in the annular groove 31 to seal the gap between the sealing plate 3 and the pipe to be tested 6; The expansion drive device 5 is provided between the blocking plate 3 and the mounting frame 1 and is used for injecting an expansion medium into the annular sealing bag 4 .

[0026] When temporarily sealing the pipe to be tested 6, a mounting frame 1 is provided, and a plurality of clamping devices 2 are provided in an emitting manner on the peripheral side of the mounting frame 1, so that the mounting frame 1 can be stably fixed at the port of the pipe to be tested 6, a sealing plate 3 is provided on one side of the mounting frame 1, and an annular groove 31 is provided on the peripheral side of the sealing plate 3 to accommodate the annular sealing bag 4, and a filling medium is injected into the annular sealing bag 4 through the expansion drive device 5, so that the annular sealing bag 4 expands to fill the gap between the sealing plate 3 and the pipe to be tested 6, and is tightly attached to the inner wall of the pipe to be tested 6, thereby achieving sealing of the pipe to be tested 6; the airbag seal and the mechanical seal are combined to have both the flexibility of the airbag seal and the stability of the mechanical seal.

[0027] Specifically, such as Figure 2 and Figure 3 As shown, the expansion drive assembly includes a cylinder body 51, a piston plate 52, an expansion communication assembly and a sliding drive assembly 53. The cylinder body 51 is cylindrical and is welded and fixed coaxially with the connecting portion 11. The piston plate 52 is a circular plate adapted to the inner diameter of the cylinder body 51. The piston plate 52 is axially slidably arranged inside the cylinder body 51 and divides the interior of the cylinder body 51 into a sealed chamber and an open chamber. In this embodiment, the sealed chamber is located on the side of the piston plate 52 away from the mounting frame 1. An expansion medium is provided inside the sealed chamber, and the expansion medium is liquid or gas. The expansion communication assembly is provided on the cylinder body 51 and is used to pass the expansion medium in the sealed chamber into the annular sealing bag 4 to expand the annular sealing bag 4 to achieve a sealing function. The sliding drive assembly 53 is provided on the connecting portion 11 and is used to push the piston plate 52 to slide toward the sealed chamber.

[0028] Reference Figure 4The sliding drive device includes a driving screw 531 and a threaded barrel 532. The threaded barrel 532 is welded and fixed to the side of the mounting frame 1 away from the cylinder body 51. The driving screw 531 is threadedly connected to the threaded barrel 532, and one end of the driving screw 531 is located at the end of the protruding threaded barrel 532 away from the mounting frame 1, and the other end passes through the mounting frame 1 and the cylinder body 51 to push the piston plate 52 to slide toward the sealing area.

[0029] When installing the sealing device of the present application, the position of the mounting frame 1 is adjusted so that the sealing plate 3 is embedded in the interior of the pipe to be tested 6 along the axial direction of the pipe to be tested 6, and the mounting frame 1 is fixed by the clamping device 2, and then the drive screw 531 is rotated so that the drive screw 531 pushes the piston plate 52 to slide, thereby compressing the volume of the sealing chamber and allowing the expansion medium in the sealing chamber to fill the annular sealing bag 4.

[0030] In order to enable the annular sealing bag 4 to adaptively increase the internal pressure of the sealing device according to the increase of the external pressure, so as to improve the sealing stability, in this embodiment, the sealing plate 3 is arranged to slide in the axial direction.

[0031] Specifically, such as Figure 4 As shown, a connecting rod 33 is provided between the sealing plate 3 and the piston plate 52. The connecting rod 33, the sealing plate 3 and the piston plate 52 are coaxially arranged. The two ends of the connecting rod 33 are welded and fixed to the sealing plate 3 and the piston plate 52 respectively, so that the sealing plate 3 and the piston plate 52 slide synchronously. The connecting rod 33 plays both a connecting role and a limiting role. When the driving screw 531 pushes the piston plate 52 to the initial sealing position, as the external pressure of the pipeline 6 to be tested continues to increase (for example, water is continuously injected into the test pool), the sealing plate will move slightly axially toward the interior of the pipeline 6 to be tested under the external pressure, thereby driving the piston plate 52 to further compress the sealing cavity, so that the pressure inside the annular sealing bag 4 is further increased, and the friction between the annular sealing bag 4 and the inner wall of the pipeline 6 to be tested is increased, further improving the sealing stability and adaptability of the sealing device of the present application.

[0032] The expansion and communication assembly, on the other hand, includes multiple connecting pipes 54. Multiple pipe joints are provided on the side of the cylinder 51 facing away from the mounting frame 1. These connecting pipes 54 communicate with the sealed area within the cylinder 51 through these joints. The other end of each connecting pipe 54 communicates with the annular sealing bladder 4. In this embodiment, six connecting pipes 54 are evenly distributed along the circumference of the cylinder 51. These six connecting pipes 54 replenish the annular sealing bladder 4 with inflation medium from six different locations, ensuring uniform expansion of the annular sealing bladder 4 and improving internal pressure uniformity.

[0033] In addition, in order to facilitate the communication between the multiple connecting pipes 54 and the annular sealing bag 4, the side wall of the blocking plate 3 is provided with multiple avoidance gaps 32, such as Figure 3As shown, the escape channel is U-shaped and communicates with the annular groove 31. The design of multiple escape notches 32 not only facilitates the connection between the connecting pipe 54 and the annular sealing bladder 4, but also allows the sidewalls of the annular sealing bladder 4 to bulge toward the annular groove 31 after expansion, thereby limiting the circumferential position of the annular sealing bladder 4 on the sealing plate 3 and improving the stability of the annular sealing bladder 4.

[0034] On the other hand, refer to Figure 5 The clamping device 2 includes a clamping bracket 21, a clamping plate 22, and a clamping drive. The clamping bracket 21 is fixedly connected to the mounting portion 12 by bolts. The clamping bracket 21 includes a vertical plate and two horizontal plates provided at both ends of the vertical plate. The vertical plates and the horizontal plates are perpendicular and integrally formed. The clamping plates 22 are rectangular plates, two of which are provided and arranged parallel to the horizontal plates. The two clamping plates 22 are located between the two horizontal plates. The clamping drive includes two clamping screws 23. The two clamping screws 23 are respectively threadedly connected to the two horizontal plates of the clamping bracket 21. The ends of the clamping screws 23 are rotatably connected to the clamping plates 22 via bearings. The side of the clamping plate 22 closest to the clamping bracket 21 is attached to the vertical plate of the clamping bracket 21 to form a limit.

[0035] Thus, when the clamping screw 23 is rotated, the clamping screw 23 pushes the clamping plate 22 to move under the threaded engagement. The two clamping screws 23 drive the two clamping plates 22 to move respectively, so that the position of the two clamping plates 22 can be freely adjusted within the range of the clamping bracket 21, and can accommodate large errors to ensure that multiple clamping devices 2 can be clamped and fixed to the port of the pipe 6 to be tested.

[0036] In order to further improve the clamping stability of the clamping device 2, a compression spring 24 is provided on the horizontal plate of the clamping bracket 21 and the clamping plate 22 bracket. The compression spring 24 is always in a compressed state to push the two clamping plates 22 to always have a tendency to move close to each other, so that the screw is always subjected to circumferential force, thereby playing a role in preventing the thread from loosening.

[0037] Elastic pads 25 are bonded and fixed to one side of the two clamping plates 22 close to each other, which can increase the friction between the clamping plates 22 and the pipe to be tested 6 and prevent the clamping plates 22 from damaging the pipe surface.

[0038] The Lianshi sealing device for pipeline sealing detection in this application combines airbag sealing and mechanical fixation, thereby having both the flexibility of airbag sealing and the stability of mechanical sealing, and is easy to install. The sliding sealing plate cooperates with the cylinder piston to adaptively increase the internal pressure of the annular sealing airbag when the external pressure increases, thereby improving the sealing effect.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A temporary blocking device for pipeline sealing detection, characterized in that: include: The mounting frame includes a connecting portion and a plurality of mounting portions, wherein the plurality of mounting portions are evenly distributed radially around the connecting portion from the center of the connecting portion; A plurality of clamping devices are provided and correspond one to one with the connecting portion, and are arranged at one end of the connecting portion away from the mounting portion, and are used to fix the mounting frame to the port of the pipeline to be tested; The plugging plate has the same cross-sectional shape as the pipe to be tested, and has an annular groove formed on its circumference, connected to the connecting portion; An annular sealing bag, made of elastic material, is disposed in the annular groove and is used to seal the gap between the sealing plate and the pipeline to be tested; The expansion drive device is arranged between the sealing plate and the mounting frame and is used for injecting an expansion medium into the annular sealing bag.

2. The temporary blocking device for pipeline sealing detection according to claim 1, characterized in that: The expansion drive device comprises: a cylinder body, fixedly connected to the connecting portion; a piston plate slidably disposed inside the cylinder body, dividing the cylinder body into a sealed chamber containing an expansion medium and an open chamber communicating with the outside; an expansion communication component, disposed on the cylinder body, for passing the expansion medium in the sealing cavity into the annular sealing bag; The sliding drive assembly is arranged on the connecting portion and is used to push the piston plate to slide toward the sealing cavity.

3. The temporary blocking device for pipeline sealing detection according to claim 2, characterized in that: A connecting rod is provided between the blocking plate and the piston plate, one end of the connecting rod is fixedly connected to the piston plate, and the other end is fixedly connected to the blocking plate. The sealing cavity is located on a side of the blocking plate close to the connecting rod.

4. The temporary blocking device for pipeline sealing detection according to claim 3, characterized in that: The expansion communication component includes a plurality of connecting pipes, one end of the connecting pipe is connected to the sealing cavity, and the other end of the connecting pipe is connected to the annular sealing bag.

5. The temporary blocking device for pipeline sealing detection according to claim 2, characterized in that: The side wall of the blocking plate is provided with a plurality of avoidance notches, the avoidance notches are communicated with the annular groove, and the connecting pipe is communicated with the annular sealing bag through the avoidance notches.

6. The temporary blocking device for pipeline sealing detection according to claim 2, characterized in that: The sliding drive assembly includes a driving screw and a threaded barrel, wherein the threaded barrel is located on the side of the connecting portion away from the cylinder body; the driving screw is threadedly connected to the threaded barrel, and its end passes through the connecting portion and the cylinder body to push the piston plate to slide close to the sealing chamber.

7. The temporary blocking device for pipeline sealing detection according to claim 1, characterized in that: The clamping device includes a clamping bracket, a clamping plate and a clamping drive. The clamping bracket is fixedly connected to the mounting portion. Two clamping plates are provided and both are slidably arranged on the clamping bracket. The clamping drive is used to drive the two clamping plates to move closer to or away from each other.

8. The temporary blocking device for pipeline sealing detection according to claim 7, characterized in that: The clamping drive comprises two clamping screws, which are threadedly connected to the clamping bracket and have ends rotatably connected to the clamping plate. One side of the clamping plate is always attached to the clamping bracket.

9. The temporary blocking device for pipeline sealing detection according to claim 8, characterized in that: A compression spring is provided between the clamping plate and the clamping bracket, and the compression spring is used to drive the clamping plate to slide close to the other clamping plate.

10. The temporary blocking device for pipeline sealing detection according to claim 9, characterized in that: Elastic pads are provided on one side of the two clamping plates close to each other.

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