Pipeline air bag plugging structure and air bag limiting device

Abstract

The invention provides a pipeline air bag plugging structure and an air bag limiting device. The pipeline air bag limiting device is used for limiting an air bag located in a pipeline and comprises a limiting body, a supporting arm and an adjusting assembly, and the limiting body is located on the axial side of the air bag and comprises a plurality of supporting rings connected with one another; the supporting arms are arranged on a supporting ring in the radial direction and used for abutting against the inner wall of the pipeline, the adjusting assembly comprises a plate sheet, a pressure sensor, an air supply device and a control part, the plate sheet is located outside the air bag and abuts against the inner wall of the pipeline, and the pressure sensor is connected with the plate sheet and used for obtaining the pressure of air bag expansion on the inner wall of the pipeline; the control part is in signal connection with the pressure sensor and the air supply device and used for adjusting the air supply amount of the air supply device to the air bag according to pressure data of the pressure sensor. The pipeline air bag limiting device can effectively limit the air bag in the pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plugging in pipelines, in particular to the field of position limiting devices for pipeline air bags. BACKGROUND

[0002] In the process of pipeline operation, air bags are usually used to plug pipelines. The inflated air bags can quickly expand to plug the pipelines to be repaired or operated, thereby facilitating subsequent operation of the operators. However, in the current pipeline construction operation, when conditions such as a large pressure in the pipeline occur, the air bag is prone to displacement, which affects the plugging effect.

[0003] In view of this problem, Chinese patent CN116293173A provides a plugging device for a municipal pipeline port. A first sleeve and a second sleeve coaxially arranged and two chuck bases enclose a gas supply cavity. A hydraulic jacking mechanism drives a support block to move outward, and the support block is pressed against the inner wall of the pipeline, thereby fixing the plugging device in the port of the pipeline. High-pressure gas in the gas supply cavity enters the air bag, the air bag is inflated, and the outer wall of the air bag is attached to the inner wall of the pipeline, thereby completing the plugging work. Due to the jacking and fixing effect of the support block, the plugging device will not move, and the air bag and the pipeline will not move relative to each other, and relative friction will not occur.

[0004] However, the above structure needs to be constructed to accommodate the air bag in the gas supply cavity, which is relatively complex and not suitable for general air bag plugging structures. SUMMARY

[0005] An object of the present application is to provide a pipeline air bag position limiting device that can effectively limit the air bag in the pipeline.

[0006] To achieve the above-mentioned purpose, the pipeline air bag position limiting device is used to limit the air bag in the pipeline, which comprises a position limiting main body, a support arm and an adjusting assembly. The position limiting main body is located on the axial side of the air bag and comprises a plurality of support rings connected to each other. The support arm is arranged on one support ring and is arranged radially to abut against the inner wall of the pipeline. The adjusting assembly comprises a plate, a pressure sensor, a gas supply device and a control component. The plate is located outside the air bag and abuts against the inner wall of the pipeline. The pressure sensor is connected to the plate and is used to obtain the pressure of the air bag inflation against the inner wall of the pipeline. The control component is signal connected to the pressure sensor and the gas supply device, and is used to adjust the gas supply amount of the gas supply device to the air bag according to the pressure data of the pressure sensor.

[0007] In one or more embodiments, the support arm comprises an electric cylinder, a push plate and a fixing clamp. The fixing clamp is used to fix the electric cylinder to the inside of the support ring located at the radially outermost side. The push plate is fixedly connected to the output end of the electric cylinder and is used to abut against the inner wall of the pipeline.

[0008] In one or more embodiments, the support arm further comprises a limiting cylinder fixed on the fixing clamp and penetrating through the support ring, and a limiting rod slidably arranged in the limiting cylinder and connected with the push plate at one end.

[0009] In one or more embodiments, the push plate comprises an inner wall contact plate and an arc-shaped soft pad outside the inner wall contact plate.

[0010] In one or more embodiments, the push plate comprises an inner slot and a micro pressure sensor arranged in the inner slot, and the inner wall contact plate is provided with an extension contact rod extending into the inner slot, and the extension contact rod abuts against the micro pressure sensor, so that the micro pressure sensor can detect the abutting pressure of the push plate against the inner wall of the pipeline.

[0011] In one or more embodiments, a plurality of support arms are arranged on the support ring in a ring direction.

[0012] In one or more embodiments, the adjusting assembly further comprises a rubber protection sheet arranged outside the plate, and the pressure sensor is arranged between the rubber protection sheet and the plate.

[0013] In one or more embodiments, the limiting body comprises a first support ring, a second support ring, and a radial connecting rod connecting the first support ring and the second support ring.

[0014] In one or more embodiments, the air bag air pipe in communication with the air bag penetrates through the gap defined by adjacent radial connecting rods.

[0015] Another object of the present application is to provide a pipeline air bag blocking structure, comprising an air bag, an air bag air pipe, and the pipeline air bag limiting device described above; wherein the air bag is fixed on one of the support rings of the limiting body, and one end of the air bag air pipe penetrates through the support ring and communicates with the air bag.

[0016] The pipeline air bag limiting device described above directly places the device on the axial side of the air bag, has a simple structure, uses the limiting body to achieve the main blocking in the axial direction, and further increases the limiting position of the air bag in the radial direction through the support of the support arm, and finally adjusts the air supply amount flexibly according to the pressure of the air bag against the inner wall of the pipeline through the adjusting assembly, thereby adjusting the pressure of the air bag, so that the air bag can resist external force and avoid displacement. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, properties, and advantages of the present application will become more apparent by the following description with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a schematic view of a pipeline gas bag limiting device;

[0019] Figure 2 is a schematic view of an embodiment of a support arm;

[0020] Figure 3 is Figure 2 is an enlarged view of A in FIG. 1;

[0021] Figure 4 is a top view of a fixing clamp, a limiting cylinder pipe;

[0022] Figure 5 is a partial sectional top view of a plate, a rubber protection sheet, a pressure sensor;

[0023] Figure 6 is a schematic view of a first support ring.

[0024] Symbolic mark explanation

[0025] 1 gas bag

[0026] 2 first support ring

[0027] 3 radial connecting rod

[0028] 4 second support ring

[0029] 5 fixing clamp

[0030] 6 electric cylinder

[0031] 7 limiting cylinder pipe

[0032] 8 limiting rod

[0033] 9 push plate

[0034] 10 pipeline inner wall touch plate

[0035] 11 arc-shaped soft pad

[0036] 12 extension touch rod

[0037] 13 inner slot

[0038] 14 limiting ring

[0039] 15 micro pressure sensor

[0040] 16 circuit board

[0041] 17 power supply socket

[0042] 18 controller socket

[0043] 19 external controller

[0044] 21 plate

[0045] 22 elastic strip

[0046] 23 pressure sensor

[0047] 24 rubber protection sheet

[0048] 28 air supply device

[0049] 29 control component

[0050] 26 gap

[0051] 30 support arm

[0052] 100 pipeline airbag limiting device

[0053] 200 pipeline DETAILED DESCRIPTION

[0054] The present application will be further described below in connection with specific embodiments and with reference to the drawings, in which more details are set forth in order to provide a thorough understanding of the present application, but it will be apparent that the present application can be carried out in various ways other than those specifically set forth herein without departing from the scope of the present application, and it will be understood by those skilled in the art that similar modifications or deductions can be made in light of actual conditions in accordance with the present application, and therefore the protection scope of the present application should not be limited by the content of the specific embodiments.

[0055] It should be noted that these and other subsequent drawings are merely examples, and are not drawn according to the condition of the same scale, and should not be used as a limitation on the actual protection scope required by the present application.

[0056] Figure 1 A perspective view along the axial direction of the pipeline is shown, the pipeline airbag limiting device 100 is located on the axial side of the airbag 1, and the pipeline axial direction is perpendicular to the direction of the paper. Figure 1

[0057] The pipeline airbag limiting device 100 is used to limit the airbag 1 located in the pipeline 200, which includes a limiting main body, a support arm and an adjusting assembly.

[0058] The limiting main body 101 is located on the axial side of the airbag, which includes a plurality of support rings connected to each other. In the embodiment shown, the limiting main body 101 includes a first support ring 2, a second support ring 4 and a radial connecting rod 3 connecting the first support ring 2 and the second support ring 4, and the gap 26 is provided between adjacent radial connecting rods 3. Figure 1 The support arm 30 is arranged on a support ring and arranged radially, which is used to abut against the inner wall of the pipeline. In the embodiment shown, the support arm 30 is arranged on the first support ring 2 and the second support ring 4.

[0059] Figure 1 ​​In the embodiment shown, six groups of support arms 30 are welded between the outer second support rings 4. The support arms 30 are arranged on the radially outermost second support rings 4, and include the electric cylinders 6, the push plates 9, and the fixed clamps 5, and also include the limiting cylinder tubes 7 and the limiting rods 8, as shown in Figure 2

[0060] The fixed clamps 5 are fixedly connected at the inner walls of the second support rings 4, respectively, and are arc-shaped, and are adapted in shape and size to the second support rings 4. The electric cylinders 6 are installed at the middle positions of the bottom ends of the fixed clamps 5. The limiting cylinder tubes 7 are welded at the two sides of the bottom ends of the fixed clamps 5, respectively. The push plates 9 are fixedly connected to the output ends of the electric cylinders 6. The limiting rods 8 are fixedly connected to the two sides of the bottom of the push plates 9, respectively. The limiting rods 8 are slidably arranged in the limiting cylinder tubes 7, and are connected to the push plates 9 at one end. The push plates 9 are fixedly connected to the output ends of the electric cylinders 6, and are used to abut against the inner walls of the pipelines 200. The electric cylinders 6 can be adapted to pipelines with different inner diameters by adjusting the positions of the push plates 9. The limiting cylinder tubes 7 and the limiting rods 8 cooperate to increase the structural strength, and also make the displacement of the push plates 9 more smooth and stable.

[0061] The control circuit board 16 electrically connected to the electric cylinders 6 can be directly arranged on the first support rings 2 or the second support rings 4, or can be arranged at other positions.

[0062] Further, as shown in Figure 3 The top of the push plate 9 is provided with a pipeline inner wall touch plate 10, and the top end of the pipeline inner wall touch plate 10 is glued with an arc-shaped soft pad 11, such as a rubber pad. The six groups of electric cylinders 6 are synchronously extended outward, and push the push plates 9 to move outward. The arc-shaped soft pad 11 on the pipeline inner wall touch plate 10 abuts against the inner wall of the pipeline to increase the friction, and is used to limit the air bag in the radial direction, and the size is adjustable. The annular support body composed of the first support rings 2, the second support rings 4, and the radial connecting rods 3 can effectively block the air bag, so that it is not easy to be pressed and displaced.

[0063] The inside of the push plate 9 is provided with two groups of inner slots 13. The bottom end inside the inner slots 13 is provided with a micro pressure sensor 15. The two sides of the bottom of the pipeline inner wall touch plate 10 are fixedly connected with extension touch rods 12, respectively. Further, to prevent the extension touch rods 12 from coming out of the inner slots 13, the bottom end of the extension touch rods 12 is fixedly connected with a limiting ring 14, and the outer diameter of the limiting ring 14 is greater than the inner diameter of the top opening of the inner slots 13. The bottom end of the limiting ring 14 and the top end of the micro pressure sensor 15 are in close contact. The micro pressure sensor 15 and the control circuit board 16 are electrically connected, which is convenient for monitoring the abutting pressure of the push plate against the inner wall of the pipeline, and judging whether the support is firm.

[0064] Specifically, the end of the extension touch rod 12 at the bottom of the pipeline inner wall touch plate 10 abuts against the micro pressure sensor 15. The pressure value can be directly viewed through an external controller 19, and the value can be used to judge whether the limiting is firm and stable. ​

[0065] In addition to limiting the airbag via an external device, the tubular airbag limiting device 100 also includes an adjustment assembly. The adjustment assembly includes a plate 21, a pressure sensor 23, an air supply device 28, and a control component 29. The plate 21 is located outside the airbag 1 and abuts against the inner wall of the tubing 200. The pressure sensor 23, including but not limited to a diaphragm-type pressure sensor, is connected to the plate 21 and is used to acquire the pressure exerted by the inflated airbag on the inner wall of the tubing. The control component 29 is signal-connected to the pressure sensor and the air supply device and is used to adjust the air supply amount from the air supply device 28 to the airbag based on the pressure data from the pressure sensor.

[0066] like Figure 5 As shown, the airbag 1 has six sets of stainless steel plates 21 arranged at equal intervals on its exterior. A rubber protective sheet 24 is attached to the outer surface of each plate 21, and a pressure sensor 23 is positioned between the plate 21 and the rubber protective sheet 24. Elastic strips 22 are movably connected to both sides of each plate 21, and adhesive tape 25 is provided on the side of the elastic strip 22 that contacts the airbag 1. The elastic strips 22 and adhesive tape 25 facilitate the assembly and disassembly of the plate 21.

[0067] Pressure sensor 23 is electrically connected to control component 29. The pressure generated by the inflating airbag pressing against the pipeline is transmitted to diaphragm pressure sensor 23 through rubber protective sheet 24. Control component 29 can determine whether air needs to be added or released based on the pressure value. If it is determined that the pressure of the inflating airbag against the inner wall of the pipeline is too small, the air supply is increased to make the airbag counteract the pressure inside the pipeline and prevent it from moving.

[0068] Figure 6 A schematic diagram of one embodiment of the first support ring 2 is shown. A power socket 17 is provided on the right side of the front end of the first support ring 2. The power socket 17 can be electrically connected to a power source to supply power to the electric cylinder 6. A controller socket 18 is provided on the left side, to which an external controller 19 is plugged. The external controller 19 is used to monitor the pressure exerted by the push plate against the inner wall of the pipe. A control circuit board 16 electrically connected to the electric cylinder 6 may also be provided at the bottom.

[0069] The airbag 1 and the pipeline airbag limiting device 100 can be configured as an integral part or as separate parts.

[0070] As in Figure 1 In the illustrated embodiment, the airbag is fixed to the first support ring of the limiting body, and one end of the airbag tube 20 passes through the support ring and communicates with the airbag 1. In use, the airbag is first placed inside the pipe, and gas is pumped into the airbag 1 through the airbag tube 20, causing the airbag 1 to inflate and block the inside of the pipe. Then, the electric cylinders 6 are activated, and all six sets of electric cylinders 6 extend outwards simultaneously, pushing the push plate 9 outwards. The rubber pad 11 on the inner wall contact plate 10 of the pipe presses against the inner wall of the pipe to increase friction, which, together with the limiting body 101, blocks the airbag, making it less susceptible to displacement due to pressure.

[0071] In other embodiments, the air bag 1 and the pipeline air bag limiting device 100 are arranged in a split structure, and the air bag air pipe 20 can pass out through the gap 26 between the adjacent radial connecting rods 3. In use, first, the air bag 1 and the pipeline air bag limiting device 100 are sequentially placed inside the pipeline, and the air bag 1 is inflated by pumping gas through the air bag air pipe 20. Then, the electric cylinders 6 are started, and the six groups of electric cylinders 6 are synchronously extended outward, pushing the push plates 9 to move outward, and the rubber pads 11 on the touch plates 10 on the inner wall of the pipeline are abutted against the inner wall of the pipeline to increase the friction, and the limiting main body 101 blocks the air bag, so that the air bag is not easily displaced under pressure.

[0072] Therefore, the limiting device described above realizes the axial direct limiting of the air bag through the limiting main body formed by the supporting rings and the connecting pieces, the air bag is directly blocked by the push plates pushed outward by the electric cylinders, the rubber pads on the end part of the push plates on the touch plates on the inner wall of the pipeline are abutted against the inner wall of the pipeline to increase the friction, so that the air bag is not easily displaced under pressure; and at the same time, the inflation of the air bag is increased by means of the judgment of the inflation pressure of the air bag, so that the air bag can effectively resist the pressure in the pipeline.

[0073] In combination with the introduction of the above-mentioned pipeline air bag limiting device, it can also be understood that a pipeline air bag plugging structure comprises an air bag, an air bag air pipe, and a pipeline air bag limiting device, the air bag is fixed on one of the supporting rings of the limiting main body, and one end of the air bag air pipe passes through the supporting ring and communicates with the air bag.

[0074] The air bag of the pipeline air bag limiting device is not easily displaced in the pipeline, thereby having a better plugging effect.

[0075] It should be noted that the above-mentioned use of the words "first", "second", and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above-mentioned words do not have special meanings unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0076] At the same time, specific words are used in the present application to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different places in the specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0077] Although the present application is disclosed with reference to the preferred embodiments above, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application, all fall within the protection scope defined by the claims of the present application.

Claims

1. A pipeline airbag limiting device, used to limit an airbag located inside a pipeline, characterized in that, include: The limiting body, located on the axial side of the airbag, includes multiple support rings connected to each other; A support arm, mounted radially on a support ring, is used to abut against the inner wall of the pipe. The regulating component includes a plate, a pressure sensor, an air supply device, and a control component. The plate is located outside the airbag and abuts against the inner wall of the pipe. The pressure sensor is connected to the plate and is used to obtain the pressure exerted by the airbag on the inner wall of the pipe when it inflates. The control component is signal-connected to the pressure sensor and the air supply device and is used to adjust the air supply amount of the air supply device to the airbag according to the pressure data from the pressure sensor.

2. The pipeline airbag limiting device as described in claim 1, characterized in that, The support arm includes an electric cylinder, a push plate, and a fixing clamp. The fixing clamp is used to fix the electric cylinder to the inner side of the support ring located on the outermost radial side. The push plate is fixedly connected to the output end of the electric cylinder and is used to abut against the inner wall of the pipe.

3. The pipeline airbag limiting device as described in claim 2, characterized in that, The support arm also includes a limiting tube and a limiting rod. The limiting tube is fixed on the fixing clamp and passes through the support ring. The limiting rod is slidably disposed inside the limiting tube, and one end is connected to the push plate.

4. The pipeline airbag limiting device as described in claim 2, characterized in that, The push plate includes a pipe inner wall contact plate and an arc-shaped soft pad located outside the pipe inner wall contact plate.

5. The pipeline airbag limiting device as described in claim 4, characterized in that, The push plate includes an inner slot and a miniature pressure sensor located in the inner slot. The inner side of the inner wall contact plate of the pipe is provided with an extension rod extending into the inner slot. The extension rod abuts against the miniature pressure sensor so that the miniature pressure sensor can detect the pushing pressure of the push plate against the inner wall of the pipe.

6. The pipeline airbag limiting device as described in claim 1, characterized in that, The plurality of the support arms are arranged circumferentially on the support ring.

7. The pipeline airbag limiting device as described in claim 1, characterized in that, The adjustment assembly also includes a rubber protective sheet disposed on the outside of the plate, and the pressure sensor is disposed between the rubber protective sheet and the plate.

8. The pipeline airbag limiting device as described in claim 1, characterized in that, The limiting body includes a first support ring, a second support ring, and a radial connecting rod connecting the first support ring and the second support ring.

9. The pipeline airbag limiting device as described in claim 8, characterized in that, The airbag tube communicating with the airbag passes through the gap defined by the adjacent radial connecting rod.

10. A pipeline airbag sealing structure, characterized in that, include: airbags; The pipeline airbag limiting device as described in any one of claims 1-8; and Airbag trachea; The airbag is fixed on one of the support rings of the limiting body, and one end of the airbag tube passes through the support ring and communicates with the airbag.

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