Pressure releasing type pipeline plugging pressurizing bag

Abstract

The utility model provides a pressure releasing type pipeline blocking pressurizing bag which comprises a pressurizing bag body, a pressure releasing pipe, a pipeline connector and two bag body fixing structures. The pressurizing bag is of an annular structure, the pressure releasing pipe is sleeved with the pressurizing bag, and the end of the pressure releasing pipe is connected with the pipeline connector; one side of the pressurizing bag is a pressure end, the other side of the pressurizing bag is a non-pressure end, and the pressure end and the non-pressure end of the pressurizing bag are both connected with the pressure relief pipe through a bag body fixing structure. According to the pressure releasing type pipeline blocking pressurizing bag, the problems that when an air bag in the related technology is used in construction and maintenance of a fluid pressure pipeline, due to the fact that an upstream valve is not tightly closed or a fluid medium cannot be cut off, the pressure borne by the air bag is too large, and therefore the air bag is displaced, fluid leaks and even explodes are solved.

Description

Technical Field

[0001] The utility model belongs to the field of water conservancy projects, in particular to a pressure relief type pipeline plugging and filling bag. Background Art

[0002] Pipeline plugging airbags, also known as water-blocking airbags, water-blocking airbags, plugging airbags, and inflatable pipe plugs, are rubber products of various specifications and shapes made from high-molecular synthetic materials such as rubber and fiber fabrics through a high-temperature vulcanization process. They are used for pipeline and culvert fluid maintenance. They are primarily used for fluid pipeline construction and maintenance. They are ideal tools for quickly blocking fluid media at different pipe diameters, different planes, and different positions. When airbags in related technologies are used in the construction and maintenance of fluid-pressurized pipelines, the upstream valves are not tightly closed or cannot cut off the fluid medium, resulting in excessive pressure on the airbags, which can cause problems such as airbag displacement, fluid leakage, and even airbag explosion. This makes it impossible to provide an ideal and stable working environment for the downstream. Leaked liquid or gas makes it difficult to ensure the dryness and independence of the construction interface, which in turn affects the smooth progress of construction and maintenance work. In particular, construction is basically impossible under pipeline connection methods such as welding, electric / thermal welding, and bonding. Summary of the Invention

[0003] In view of this, the present invention aims to solve one of the related technical problems at least to a certain extent.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A pressure relief type pipeline plugging and filling bag, comprising a pressure relief bag, a pressure relief pipe, a pipeline joint and two bag fixing structures;

[0006] The pressure bag is an annular structure, and the pressure bag is sleeved outside the pressure relief pipe, and the end of the pressure relief pipe is connected to the pipe joint;

[0007] One side of the pressure-inflating bag is a pressure end, and the other side of the pressure-inflating bag is a non-pressure end. Both the pressure end and the non-pressure end of the pressure-inflating bag are connected to the pressure relief pipe through a bag fixing structure.

[0008] Furthermore, the outer wall of the inflation bag is provided with anti-slip grooves.

[0009] Furthermore, the end surface of the inflation bag is provided with a lifting lug.

[0010] Furthermore, the bag body fixing structure includes a pressure-bearing plate, a first clamping nut and a first clamping gasket. The pressure-bearing plate is sleeved on the outside of the pressure-relief tube. The pressure-bearing plate is fixedly connected to the pressure-relief tube. The pressure-bearing plate is used to press against the inner wall of the pressure-inflating bag. The first clamping nut presses the outer wall of the pressure-inflating bag through the first clamping gasket. The first clamping nut and the first clamping gasket are both arranged on the pressure-relief tube.

[0011] Furthermore, the end surface of the first compression gasket in contact with the inflation bag is provided with an anti-slip edge.

[0012] Furthermore, it also includes a charging structure, which includes an inflation nozzle, a second compression nut and a second compression gasket, and the inflation nozzle is connected to the inflation bag through the second compression nut and the second compression gasket.

[0013] Furthermore, it also includes a charging extension tube, which is connected to the charging nozzle.

[0014] Furthermore, it also includes a pressure relief extension pipe, which is connected to the pipeline joint.

[0015] Compared with the prior art, the pressure-relieving pipe plugging and filling bag described in the present invention has the following advantages:

[0016] 1. Conventional pipeline plugging airbags often experience excessive pressure on the airbag due to upstream valves not closing tightly or failing to cut off the fluid medium, resulting in airbag displacement, fluid leakage, and even airbag explosion. After displacement and leakage occur, welding, electric / thermal welding, bonding, and other operations in the downstream working area cannot be carried out normally. This device adds a pipeline pressure relief pipe, which releases the pressure in the working pipeline and discharges excess fluid through the pressure relief pipe, thereby achieving the purpose of reducing the pressure in the working pipeline and stabilizing the position of the airbag, and making the downstream working area dry and pollution-free, ensuring and improving the stability and safety of operations such as welding, electric / thermal welding, and bonding that require high dryness, thereby overcoming the shortcomings of conventional pipeline plugging airbags that are prone to leakage, and solving the pain points of low construction safety, unstable construction quality, and high subsequent maintenance rate due to the contact of the pipeline construction working surface with the fluid in the pipeline.

[0017] 2. This device simultaneously optimizes the structure of conventional pipe plugging airbags to ensure low production failure rate and safe and reliable use; while being easier to manufacture, it strives to be environmentally friendly and economical, so that each component in this device can be more easily disassembled, assembled, repaired, replaced, etc. according to user needs, and can be reused repeatedly to save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a pressure-relieving pipe plugging and filling bag according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Cross-section at AA;

[0021] Figure 3 This is a left view of a pressure relief pipe plugging and filling bag according to an embodiment of the present utility model;

[0022] Figure 4 Figure 1 Cross-section at the middle BB;

[0023] Figure 5 This is a view of the pressure end according to an embodiment of the present utility model;

[0024] Figure 6 This is a non-pressure end view of an embodiment of the present utility model;

[0025] Figure 7 This is a three-dimensional schematic diagram of a pressure-relieving pipe plugging and filling bag according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the pressurized bag according to an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of the weld structure according to an embodiment of the present utility model;

[0028] Figure 10 This is a schematic diagram of the assembly structure of the bladder fixing structure and the pressure relief pipe according to an embodiment of the present utility model;

[0029] Figure 11 This is a schematic diagram of the combined structure of the pipeline blocking device and the working pipeline according to an embodiment of the present utility model;

[0030] Figure 12 This is a diagram showing the working principle of the pipeline blocking device according to an embodiment of the present utility model.

[0031] Description of reference numerals:

[0032] 1. Pressure relief pipe; 100. Working pipe; 11. Pipe interface; 12. First threaded structure; 13. Pressure-bearing plate; 14. Pressure-bearing main pipe; 15. Weld; 16. Second threaded structure; 2. Pressure bag; 21. First mounting port; 22. Second mounting port; 23. Gas nozzle mounting port; 24. Anti-slip groove; 25. Lifting lug; 26. Pressurized medium; 3. First compression gasket; 31. Stabilizing working surface; 4. First compression nut; 5. Gas nozzle; 51. Pressure extension pipe; 6. Second compression gasket; 7. Second compression nut; 8. Pipe joint; A. Pressure end; B. Non-pressure end. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "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 communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] A pressure relief type pipeline plugging and filling bag, such as Figure 1As shown, it includes a pressure-filled bladder 2, a pressure-relief pipe 1, a pipe joint 8, and two bladder fixing structures; the pressure-filled bladder 2 is an annular structure, and the pressure-filled bladder 2 is sleeved on the outside of the pressure-relief pipe 1, and the end of the pressure-relief pipe 1 is connected to the pipe joint 8; one side of the pressure-filled bladder 2 is a pressure-containing end A, and the other side of the pressure-filled bladder 2 is a non-pressure end B. Both the pressure-filled end A and the non-pressure end B of the pressure-filled bladder 2 are connected to the pressure-relief pipe 1 through a bladder fixing structure. It also includes a pressure-filled structure and a pressure-filled extension pipe 51. The pressure-filled structure includes an inflation nozzle 5, a second compression nut 7, and a second compression gasket 6. The inflation nozzle 5 is connected to the pressure-filled bladder 2 through the second compression nut 7 and the second compression gasket 6. The pressure-filled extension pipe 51 is connected to the inflation nozzle 5. Insert the inflation nozzle 5 from the inside to the outside of the pressure bag 2 (the pressure bag is mostly made of flexible pressure-bearing materials such as rubber), insert the second compression gasket 6 and the second compression nut 7 in sequence, and tighten the second compression nut 7 clockwise so that the air nozzle mounting port 23 is clamped and fixed by the pressure bag 5 and the pressure bag gasket 6. Put the pressure bag 2 with anti-slip grooves 24 on the outside of the pressure-relief tube 1 (the pressure-relief tube is mostly made of rigid pressure-bearing materials such as carbon steel and stainless steel) from the first mounting port 21 and the second mounting port 22 in sequence, and make the upper and lower pressure-bearing plates 13 located on the inside of the pressure bag 2. The first threaded structure 12 (non-pressure end) and the second threaded structure 16 (pressure end) are respectively inserted into the pressure-relief tube compression gasket 3 and the pressure-relief tube compression nut 4, and cooperate with the pressure-relief tube pressure-bearing plate 13 to clamp the inflation bag 2 therein.

[0038] In this embodiment, the outer wall of the pressure bag 2 is provided with anti-slip grooves 24. The end surface of the pressure bag 2 is provided with a lifting ear 25.

[0039] The bladder fixing structure includes a pressure-bearing plate 13, a first compression nut 4 and a first compression gasket 3. The pressure-bearing plate 13 is sleeved on the outside of the pressure-relieving pipe 1. The pressure-bearing plate 13 is fixed to the pressure-relieving pipe 1. The pressure-bearing plate 13 is used to resist the inner wall of the pressure-filled bag 2. The first compression nut 4 compresses the outer wall of the pressure-filled bag 2 through the first compression gasket 3. The first compression nut 4 and the first compression gasket 3 are both arranged on the pressure-relieving pipe 1. In this embodiment, the end face of the first compression gasket 3 in contact with the pressure-filled bag 2 is provided with an anti-slip ridge. The pressure-relief pipe pressure-bearing plate 13 and the pressure-relief main pipe 14 are connected at the pressure-relief pipe pressure-bearing plate welding seam 15 using welding and other processes. The pressure-relief pipe 1 can also be made as a whole using an integrated molding process to ensure the air tightness and pressure-bearing performance of the equipment. In addition, the pressure-relief pipe pressure-bearing plate 13 is also provided with an anti-slip ridge on the contact side with the pressure-filled bag 2 (the function of the anti-slip ridge is to increase the friction of the contact surface and prevent the first mounting port 21 and the second mounting port 22 from displacement). Tighten the first compression nuts 4 at the upper and lower ends of the pressure relief pipe 1 clockwise, so that the first mounting port 21 and the second mounting port 22 of the pressure bladder are tightly clamped and fixed by the pressure-bearing plate 13 and the first compression gasket 3, forming a closed, inflatable space consisting of the pressure-bearing main pipe 14, the pressure-bearing plate 13, and the pressure bladder 2. The inflation nozzle 5 can also be connected to a pressure extension pipe and valve for remote charging and depressurization of the pressure bladder 2. Both the pressure relief extension pipe and the pressure extension pipe can be made of flexible pressure-bearing materials, ensuring that this equipment can be used in special locations such as elbows and tees.

[0040] The device also includes a pressure relief extension tube, which connects to pipe connector 8. Connecting to pipe connector 8 is a quick connector, which is used to connect the pressure relief extension tube. The other end of the pressure relief extension tube is connected to a fluid recovery device or an unrelated working environment outside the pipeline. The quick connector and the pressure relief extension tube can be connected using a variety of methods, including clamps, threads, and plug-in connections. The quick connector is used as an example.

[0041] How this example works

[0042] <1> The user shall select the size parameters of the pressure bag and pressure relief pipe and the pressure medium according to the actual situation on site and the construction process requirements. The device can be used after checking that the external dimensions are correct and the connection parts are not loose.

[0043] <2> Insert the pressure end of the device into the pipe that needs to be constructed or repaired at a position greater than 30 cm, and determine the length of the pressure relief extension pipe connected at the quick connector 8 according to the distance of the construction pipe.

[0044] <3> The device is pressurized at the inflation nozzle 5. This process can be combined with a pressure extension tube. Once pressurization is complete, ensure that the inflatable bladder 2 is in close contact with the inner wall of the pipeline to be repaired or serviced. The anti-slip grooves 2-4 on the bladder function effectively, allowing the pressure fluid in the pipeline to be relieved from the pressurized end through the pressure relief tube 1, the quick connector, and the pressure relief extension tube. Construction can then begin at the target location.

[0045] <4> During the construction process, the pressure end of the device is not easily displaced even when subjected to pressure shock in the pipeline. The excess fluid in the pipeline is discharged to an irrelevant working environment such as a fluid medium recovery device or outside the pipeline through the pressure relief pipe 1, the quick connector and the pressure relief extension pipe, and the local pressure on the pressure end is released, thereby providing a stable and reliable pressure-free working surface for the non-pressure end pipeline construction operation, ensuring that the operating surface is dry, safe and undisturbed.

[0046] <5> After the construction of the non-pressure end is completed, the pressure bag 2 can be depressurized through the inflation nozzle 5 and the pressure extension tube 51. After the pressure relief is completed, the pressure bag lifting ear 25 can be connected through the connecting rope to completely remove the pressure bag from the construction or maintenance pipeline or the connection reserved port, thereby completing the pipeline construction or maintenance work.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure relief pipe plugging and filling bag, characterized by: It comprises a pressure-filled bag (2), a pressure-relieving pipe (1), a pipe joint (8) and two bag fixing structures; The pressure-inflating bag (2) is an annular structure, and the pressure-inflating bag (2) is sleeved on the outside of the pressure-relief pipe (1), and the end of the pressure-relief pipe (1) is connected to the pipe joint (8); One side of the pressure-filled bag (2) is a pressure-carrying end (A), and the other side of the pressure-filled bag (2) is a non-pressure-carrying end (B). Both the pressure-carrying end (A) and the non-pressure-carrying end (B) of the pressure-filled bag (2) are connected to the pressure-relief pipe (1) via a bag fixing structure.

2. The pressure-relieving pipe plugging and filling bag according to claim 1, characterized in that: The outer wall of the pressure-filled bag (2) is provided with anti-slip grooves (24).

3. The pressure-relieving pipe plugging and filling bag according to claim 1, characterized in that: The end surface of the pressure-filled bag (2) is provided with a lifting lug (25).

4. A pressure-relieving pipe plugging and filling bag according to any one of claims 1 to 3, characterized in that: The bladder fixing structure includes a pressure-bearing plate (13), a first clamping nut (4) and a first clamping gasket (3); the pressure-bearing plate (13) is sleeved on the outside of the pressure relief pipe (1); the pressure-bearing plate (13) is fixedly connected to the pressure relief pipe (1); the pressure-bearing plate (13) is used to press against the inner wall of the pressure-filled bladder (2); the first clamping nut (4) presses the outer wall of the pressure-filled bladder (2) through the first clamping gasket (3); the first clamping nut (4) and the first clamping gasket (3) are both arranged on the pressure relief pipe (1).

5. The pressure-relieving pipe plugging and filling bag according to claim 4, characterized in that: The end surface of the first compression gasket (3) in contact with the pressure bag (2) is provided with an anti-slip edge.

6. The pressure-relieving pipeline plugging and filling bag according to claim 5, characterized in that: It also includes a charging structure, which includes an inflation nozzle (5), a second compression nut (7) and a second compression gasket (6). The inflation nozzle (5) is connected to the inflation bag (2) through the second compression nut (7) and the second compression gasket (6).

7. The pressure-relieving pipeline plugging and filling bag according to claim 6, characterized in that: It also includes a pressure-charging extension tube (51), which is connected to the inflation nozzle (5).

8. The pressure-relieving pipeline plugging and filling bag according to claim 4, characterized in that: It also includes a pressure relief extension pipe, which is connected to the pipeline joint (8).

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