Temporary plugging device for pipeline

Abstract

The utility model relates to a pipe plugging device, and provides a temporary pipeline plugging device which comprises a plurality of sealing assemblies arranged in the end of a pipeline in a stacked mode, a pull rod used for being connected with the sealing assemblies, a supporting plate arranged at the end of the pipeline, a through hole formed in the supporting plate and an external thread arranged at the end of the pull rod. The pull rod is in threaded connection with a nut after penetrating through the through hole, and the nut abuts against the supporting plate; the sealing assembly comprises an annular air bag, a pair of clamping plates arranged on the two sides of the air bag correspondingly, and first sliding holes formed in the middles of the clamping plates. The pull rod is arranged in the first sliding hole in a sealed and sliding mode and fixedly connected with the clamping plate farthest from the supporting plate. The air bag is made of an elastic material; the outer diameter of the clamping plate is smaller than that of the air bag. The utility model aims to provide a temporary plugging device for a pipeline, which can be used for efficiently and temporarily plugging the pipeline on the premise of not needing external electric equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe blocking devices, in particular to a temporary pipe blocking device. Background Art

[0002] For some pipelines used for transportation, such as gas pipes and water pipes, it is necessary to seal the ends of the pipelines under certain circumstances to prevent water leakage, gas leakage, or to conduct air tightness tests.

[0003] A common sealing device is an airbag. This is achieved by inserting the airbag into the pipe and injecting high-pressure gas into it to inflate it, thereby blocking the pipe. However, this method requires specialized pressurizing equipment and is cumbersome to use. Furthermore, the large contact area between the airbag and the pipe can cause slight wrinkles during inflation, which can affect the sealing effect. Utility Model Content

[0004] The purpose of the utility model is to provide a pipeline temporary blocking device, which can effectively temporarily block the pipeline without the need for external electric equipment.

[0005] The present invention is realized through the following technical solutions: the temporary pipe plugging device of the present invention comprises a plurality of sealing assemblies stacked and arranged inside the end of the pipe, a pull rod for connecting the sealing assemblies, a support plate arranged at the end of the pipe, a through hole opened in the support plate, and an external thread provided at the end of the pull rod; the pull rod is threadedly connected with a nut after passing through the through hole, and the nut abuts against the support plate; the sealing assembly comprises an annular airbag, a pair of splints respectively arranged on both sides of the airbag, and a first sliding hole opened in the middle of the splint; the pull rod seal is slidingly arranged in the first sliding hole, and the pull rod is fixedly connected to the splint farthest from the support plate; the airbag is made of elastic material; the outer diameter of the splint is smaller than the outer diameter of the airbag.

[0006] Furthermore, the splint and the airbag are connected by an adhesive.

[0007] Furthermore, the diameter of the first sliding hole is smaller than the inner diameter of the airbag.

[0008] Furthermore, the sealing assembly also includes a spring for connecting a pair of the clamping plates.

[0009] Furthermore, the sealing assembly also includes a fixed block arranged on the side of the splint away from the airbag, a second sliding hole opened in the fixed block, a circular groove arranged on the inner wall of the second sliding hole, and a sealing ring clamped in the groove; the first sliding hole and the second sliding hole are coaxially arranged and have the same diameter.

[0010] Furthermore, a support tube is provided on one side of the support plate close to the sealing assembly; the support tube is provided at the through hole, an end of the support tube abuts against the fixing block, and the pull rod is provided through the support tube.

[0011] Furthermore, a clamp is sleeved on the outer wall of the pipe end; and the side of the clamp abuts against the support plate.

[0012] The technical solution of the present invention has at least the following advantages and beneficial effects: the temporary pipe blocking device of the present invention, when in use, inserts multiple sealing components into the inside of the pipe, then clamps the column support plate at the end of the pipe, passes the pull rod through the through hole of the support plate, screws the nut onto the pull rod, and uses a wrench to slowly tighten the nut. During the rotation of the nut, since the nut and the pull rod are threadedly connected, the pull rod can be pulled out of the pipe, thereby compressing the multiple sealing components. When the sealing component is compressed, a pair of splints will squeeze the airbag, causing the airbag to expand outward and cling to the inner wall of the pipe, thereby achieving a bottom sealing effect, and the screw and the first sliding hole are also sealed, so that the pipe can be well sealed, and multiple sealing components can effectively improve the sealing effect. It has a certain sealing effect for gas within a certain air pressure and water flow within a certain water pressure, and is simple to operate, does not require additional electric equipment, air compressor, etc., is very convenient to disassemble and assemble, and is applicable to pipes within a certain inner diameter range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic structural diagram of a temporary pipeline blocking device provided by an embodiment of the present utility model;

[0015] Figure 2 A schematic diagram of the internal structure of the temporary pipeline blocking device provided by an embodiment of the present utility model;

[0016] Figure 3 A schematic structural diagram of a sealing assembly provided by an embodiment of the present utility model from one perspective;

[0017] Figure 4 A schematic structural diagram of a sealing assembly provided by an embodiment of the present utility model from two perspectives;

[0018] Figure 5This is a schematic structural diagram of a partially unfolded sealing assembly provided in an embodiment of the present invention.

[0019] Icons: 10-pipe, 20-sealing assembly, 21-airbag, 22-clamp, 23-fixing block, 24-first sliding hole, 25-second sliding hole, 26-spring, 31-pull rod, 32-support plate, 33-nut, 34-support tube, 35-clamp. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0024] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] Example

[0026] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 5 As shown, the temporary pipe sealing device of this embodiment includes a plurality of sealing assemblies 20 stacked inside the end of the pipe 10, a pull rod 31 for connecting the sealing assembly 20, a support plate 32 provided at the end of the pipe 10, a through hole opened in the support plate 32, and an external thread provided at the end of the pull rod 31; the pull rod 31 is threadedly connected to a nut 33 after passing through the through hole, and the nut 33 abuts against the support plate 32; the sealing assembly 20 includes an annular airbag 21, a pair of splints 22 respectively provided on both sides of the airbag 21, and a first sliding hole 24 provided in the middle of the splint 22; the pull rod 31 is sealingly slidably provided in the first sliding hole 24, and the pull rod 31 is fixedly connected to the splint 22 farthest from the support plate 32; the airbag 21 is made of elastic material; the outer diameter of the splint 22 is smaller than the outer diameter of the airbag 21. Specifically, when in use, multiple sealing components 20 are inserted into the interior of the pipe 10, and then the column support plate 32 is clamped at the end of the pipe 10, the pull rod 31 is passed through the through hole of the support plate 32, the nut 33 is screwed into the pull rod 31, and the nut 33 is slowly screwed with a wrench. During the rotation of the nut 33, since the nut 33 and the pull rod 31 are threadedly connected, the pull rod 31 can be pulled out of the pipe 10, thereby compressing the multiple sealing components 20. When the sealing components 20 are compressed, the pair of clamping plates 22 will squeeze the gas The airbag 21 is configured so that the airbag 21 is tightly attached to the inner wall of the pipe 10 after expanding outward, thereby achieving a bottom sealing effect, and the screw and the first sliding hole 24 are also sealed. Therefore, the pipe 10 can be well sealed, and multiple sealing components 20 can effectively improve the sealing effect. It has a certain sealing effect for gas within a certain air pressure and water flow within a certain water pressure. It is easy to operate and does not require additional electric equipment, air compressors, etc. It is very convenient to disassemble and assemble, and is applicable to pipes 10 within a certain inner diameter range.

[0027] In this embodiment, the splint 22 and the airbag 21 are connected by an adhesive, which can ensure that the airbag 21 and the splint 22 are stably connected.

[0028] In this embodiment, the diameter of the first sliding hole 24 is smaller than the inner diameter of the airbag 21. Specifically, the airbag 21 will not only expand outward but also inward, so the diameter of the first sliding hole 24 needs to be smaller so that the airbag 21 will not contact the pull rod 31.

[0029] The sealing assembly 20 in this embodiment further includes a spring 26 for connecting the pair of clamping plates 22. Specifically, when the nut 33 is loosened, the spring 26 moves the pair of clamping plates 22 away from each other, thereby causing the airbag 21 to contract inward, making it very easy to remove the sealing assembly 20 from the pipe 10.

[0030] The sealing assembly 20 in this embodiment also includes a fixed block 23 positioned on the side of the clamping plate 22 away from the airbag 21, a second sliding hole defined in the fixed block 23, a circular groove formed in the inner wall of the second sliding hole, and a sealing ring retained in the groove. The first sliding hole 24 and the second sliding hole are coaxially arranged and have the same diameter. Specifically, the use of the fixed block 23 increases the axial length of the connection between the pull rod 31 and the clamping plate 22, thereby allowing the installation of a sealing ring (O-ring) in the fixed block 23 for sealing.

[0031] In this embodiment, a support tube 34 is provided on the side of the support plate 32 near the sealing assembly 20. The support tube 34 is located at the through hole, with the end of the support tube 34 abutting against the fixing block 23. The pull rod 31 is disposed through the support tube 34. Specifically, this allows the sealing assembly 20 and the airbag 21 to be positioned as close to the interior of the pipe 10 as possible.

[0032] In this embodiment, a clamp 35 is sleeved on the outer wall of the end of the pipe 10; the side of the clamp 35 abuts the support plate 32. Specifically, for plastic pipes such as PE pipes, if they are not thick enough, they may not be able to withstand the pressure of the support plate 32 and may deform. Therefore, the clamp 35 is first tied to the outer wall of the pipe 10, and then the support plate 32 is abutted against the clamp 35. In addition, if there is positive pressure inside the pipe 10, to prevent the high pressure inside the pipe 10 from pushing out the sealing assembly 20, the clamp 35 can be fixed to the support plate 32, specifically by bolts or snap fasteners.

[0033] In summary, the temporary pipe plugging device of this embodiment is used by inserting multiple sealing components 20 into the interior of the pipe 10, then clamping the support plate 32 at the end of the pipe 10, passing the pull rod 31 through the through hole of the support plate 32, screwing the nut 33 into the pull rod 31, and slowly tightening the nut 33 with a wrench. During the rotation of the nut 33, since the nut 33 and the pull rod 31 are threadedly connected, the pull rod 31 can be pulled out of the pipe 10, thereby compressing the multiple sealing components 20. When the sealing components 20 are compressed, a pair of The splint 22 will squeeze the airbag 21, so that the airbag 21 will be tightly attached to the inner wall of the pipe 10 after expansion, thereby achieving a bottom sealing effect, and the screw and the first sliding hole 24 are also sealed. Therefore, the pipe 10 can be well sealed, and multiple sealing components 20 can effectively improve the sealing effect. It has a certain sealing effect for gas within a certain air pressure and water flow within a certain water pressure. It is easy to operate and does not require additional electric equipment, air compressors, etc. It is very convenient to disassemble and assemble, and is applicable to pipes 10 within a certain inner diameter range.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A temporary pipeline blocking device, characterized by: It comprises a plurality of sealing assemblies (20) stacked and arranged inside the end of a pipe (10), a pull rod (31) for connecting the sealing assemblies (20), a support plate (32) arranged at the end of the pipe (10), a through hole opened in the support plate (32), and an external thread provided at the end of the pull rod (31); The pull rod (31) is threadedly connected to a nut (33) after passing through the through hole, and the nut (33) abuts against the support plate (32); The sealing assembly (20) includes an annular airbag (21), a pair of splints (22) respectively arranged on both sides of the airbag (21), and a first sliding hole (24) opened in the middle of the splint (22); the pull rod (31) is sealingly slidably arranged in the first sliding hole (24), and the pull rod (31) is fixedly connected to the splint (22) farthest from the support plate (32); the airbag (21) is made of an elastic material; the outer diameter of the splint (22) is smaller than the outer diameter of the airbag (21).

2. The temporary pipeline blocking device according to claim 1, characterized in that: The splint (22) and the airbag (21) are connected via an adhesive.

3. The temporary pipeline blocking device according to claim 1, characterized in that: The diameter of the first sliding hole (24) is smaller than the inner diameter of the airbag (21).

4. The temporary pipeline blocking device according to claim 3, characterized in that: The sealing assembly (20) further includes a spring (26) for connecting the pair of clamping plates (22).

5. The pipeline temporary blocking device according to claim 1, characterized in that: The sealing assembly (20) further comprises a fixing block (23) disposed on a side of the clamping plate (22) away from the airbag (21), a second sliding hole provided in the fixing block (23), a circular groove provided on an inner wall of the second sliding hole, and a sealing ring clamped in the groove; The first sliding hole (24) and the second sliding hole are coaxially arranged and have the same diameter.

6. The temporary pipeline blocking device according to claim 5, characterized in that: A support tube (34) is provided on one side of the support plate (32) close to the sealing assembly (20); The support tube (34) is arranged at the through hole, the end of the support tube (34) abuts against the fixed block (23), and the pull rod (31) is arranged through the support tube (34).

7. The temporary pipeline blocking device according to claim 1, characterized in that: A clamp (35) is sleeved on the outer wall of the end of the pipe (10); the side of the clamp (35) abuts against the support plate (32).

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