Pipeline plugging air bag with safety drawstring

Abstract

The utility model discloses a pipeline plugging air bag with a safety drawstring, which relates to the field of pipeline plugging and comprises an air bag body, the safety drawstring and a first limit band, the safety drawstring crosses the tail of the air bag body, and two ends of the safety drawstring respectively extend to two sides of the head of the air bag body. The first limiting belt is fixed to the tail of the air bag body, a first limiting gap is formed between the first limiting belt and the air bag body, and the safety pull belt penetrates through the first limiting gap and can be freely pulled in the first limiting gap. Compared with the prior art, the safety pull belt has the advantages that the safety pull belt can adapt to the best stress mode through the continuous change of the length of the parts, located on the two sides of the air bag body, of the safety pull belt, it is guaranteed that each safety pull belt can bear even pulling force, and the situation that one safety pull belt is too large in pulling force, and the other safety pull belt is not stressed is avoided.

Description

Technical Field

[0001] The utility model relates to the field of pipeline blocking, in particular to a pipeline blocking airbag with a safety drawstring. Background Art

[0002] Municipal drainage pipeline construction is divided into several categories, including pipeline inspection, maintenance, and repair. Most pipeline construction uses manual work in the well, and some use inspection and repair robots. Before construction, the robot or work tool needs to be moved to the bottom of the inspection well for subsequent inspection or repair work.

[0003] Currently, after professionals perform airbag sealing, the airbag needs to be placed in the pipeline for a period of time. Long-term high water pressure and the reduction in airbag pressure caused by external factors will cause the airbag to be washed to the downstream of the pipeline by water, resulting in sealing failure. This requires adding a safety strap around the inflation end of the airbag when producing the airbag. After the airbag is sealed, it is tied to the safety strap with rope buckles of different materials, and the other end of the rope is fixed to the inspection well mouth on the ground.

[0004] Currently, the common safety strap is fused to the airbag body by hot melting. When the airbag is squeezed and moved, the safety strap will pull the airbag through the fusion surface between the airbag body and the airbag body to keep it in place. Due to the small area of ​​the fusion surface, the fusion surface is subjected to great pressure, which can easily cause the base material of the airbag body at the fusion surface to be torn.

[0005] Patent document with publication number CN111059402A discloses a pipeline plugging airbag, which forms a pull net by bundling draw ropes fixed on a fixed ring, and the draw net is sleeved on the outside of the airbag body to pull the airbag. In this fixing method, since the draw ropes are bundled and fixed on the fixed ring, the length of each draw rope is fixed. When the airbag moves in the pipeline, the force position and force point are constantly changing. The fixed length of the draw rope cannot ensure that each draw rope can withstand uniform tension, and there will be a situation where one draw rope has too much tension while the other draw rope is not stressed. Utility Model Content

[0006] The technical problem to be solved by the utility model is to enable the safety strap to adapt itself to the best force-bearing mode.

[0007] The utility model solves the above-mentioned technical problems through the following technical means: a pipeline plugging airbag with a safety drawstring, comprising an airbag body, a safety drawstring and a first limiting belt, the safety drawstring spanning the tail of the airbag body and having two ends extending to both sides of the head of the airbag body respectively, the first limiting belt being fixed to the tail of the airbag body and forming a first limiting gap between the airbag body, the safety drawstring passing through the first limiting gap and being able to be freely drawn in the first limiting gap.

[0008] As an optimized technical solution, the pipeline plugging airbag with a safety drawstring further includes a pull ring, and both ends of the safety drawstring are provided with a pull ring, so as to facilitate the connection between the safety drawstring and the rope.

[0009] As an optimized technical solution, the pipeline plugging airbag with a safety strap further includes a quick connector, the interior of the airbag body is divided into a plurality of compartments, and the head of the airbag body is provided with a quick connector corresponding to each compartment. The quick connector can be used to quickly connect the inflation and deflation system.

[0010] As an optimized technical solution, two safety straps are provided, which cross each other at the tail of the airbag body. The parts of each safety strap located on both sides of the airbag body extend along the generatrix of the airbag body and the four parts are evenly distributed in the circumferential direction of the airbag body.

[0011] As an optimized technical solution, each safety strap is provided with two sets of first limiting straps respectively located at the radial ends of the rear portion of the airbag body.

[0012] As an optimized technical solution, the safety strap is a strip-shaped strap and is laid flat on the surface of the airbag body.

[0013] As an optimized technical solution, the pipe sealing airbag with a safety drawstring also includes a second limiting belt, which is fixed to the side of the airbag body and forms a second limiting gap between the airbag body, and the safety drawstring passes through the second limiting gap and can be freely pulled in the second limiting gap.

[0014] As an optimized technical solution, the parts of each safety strap located on both sides of the airbag body are respectively provided with two groups of second limiting belts located at both ends of the main line of the airbag body.

[0015] As an optimized technical solution, the first limiting belt is a strip belt whose length direction is perpendicular to the radial direction of the rear part of the airbag body and whose two ends are respectively fixed to the rear part of the airbag body, and the first limiting gap is formed between the middle part of the first limiting belt and the airbag body; the second limiting belt is a strip belt whose length direction is perpendicular to the main line of the airbag body and whose two ends are respectively fixed to the side surface of the airbag body, and the second limiting gap is formed between the middle part of the second limiting belt and the airbag body.

[0016] As an optimized technical solution, the first limiting belt and the second limiting belt are both fixed on the airbag body by hot melting.

[0017] The advantages of the utility model are:

[0018] 1. The airbag body is held in the middle by the safety drawstring, which protects the airbag body when it is squeezed and moved; at the same time, the safety drawstring can be freely pulled in the first limiting belt. When the airbag body moves in the pipeline, the force position and force point are constantly changing. The safety drawstring can adapt to the best force mode by continuously changing the length of the parts on both sides of the airbag body, ensuring that each safety drawstring can withstand uniform tension, and there will be no situation where one safety drawstring is over-tensioned while the other is not stressed.

[0019] 2. The first limiting belt and the second limiting belt limit the position of the safety belt relative to the airbag body to prevent the safety belt from deviating, so that the two safety belts always remain cross-shaped and limit the twisting and deformation of the safety belts, thereby achieving a better blocking effect when the airbag is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a first-angle axonometric schematic diagram of a pipeline blocking airbag with a safety drawstring according to an embodiment of the utility model.

[0021] Figure 2 This is a second angle axonometric diagram of a pipeline plugging airbag with a safety strap according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0023] like Figure 1 , Figure 2 As shown, an embodiment of the utility model discloses a pipeline blocking airbag with a safety drawstring, comprising an airbag body 1, a safety drawstring 2, a first limiting belt 3, a second limiting belt 4, a pull ring 5 and a quick connector 6.

[0024] Two safety straps 2 are provided, and the two safety straps 2 cross each other at the tail of the airbag body 1. The parts of each safety strap 2 located on both sides of the airbag body 1 extend along the generatrix of the airbag body 1 and the four parts are evenly distributed in the circumferential direction of the airbag body 1. Each safety strap 2 crosses the tail of the airbag body 1 and the two ends extend to both sides of the head of the airbag body 1 respectively. The safety strap 2 is a strip belt and is laid flat on the surface of the airbag body 1.

[0025] Each safety strap 2 is provided with two sets of first limiting belts 3 respectively located at the radial ends of the rear part of the airbag body 1. The first limiting belt 3 is a strip belt whose length direction is perpendicular to the radial end of the rear part of the airbag body 1 and the two ends are respectively hot-melt fixed to the rear part of the airbag body 1. A first limiting gap is formed between the middle part of the first limiting belt 3 and the airbag body 1. The safety strap 2 passes through the first limiting gap and can be freely pulled in the first limiting gap.

[0026] The parts of each safety strap 2 located on both sides of the airbag body 1 are respectively provided with two groups of second limiting belts 4 located at both ends of the busbar of the airbag body 1. The second limiting belt 4 is a strip belt with a length direction perpendicular to the busbar of the airbag body 1 and both ends are hot-melt fixed to the side of the airbag body 1. A second limiting gap is formed between the middle part of the second limiting belt 4 and the airbag body 1. The safety strap 2 passes through the second limiting gap and can be freely pulled in the second limiting gap.

[0027] Both ends of the safety strap 2 are provided with pull rings 5 ​​to facilitate the connection between the safety strap 2 and the rope.

[0028] The interior of the airbag body 1 is divided into a plurality of compartments, and a quick connector 6 is provided at the head of the airbag body 1 corresponding to each compartment, through which the inflation and deflation system can be quickly connected.

[0029] Working principle: The airbag body 1 is held in the middle by the safety strap 2, and the position of the safety strap 2 relative to the airbag body 1 is limited by the first limiting strap 3 and the second limiting strap 4 to prevent the safety strap 2 from deviating, so that the two safety straps 2 always keep a cross and limit the distortion of the safety strap 2, so as to achieve a better blocking effect when the airbag is blocked; when the airbag body 1 is squeezed and moved, the airbag body 1 will not bear the tension, and the tension is all borne by the safety strap 2 around the airbag body 1, which protects the airbag body 1. Compared with the safety strap directly passing through the heat The structure is fused to the airbag body by melting, which avoids the mother material fusion surface of the airbag body 1 from being torn due to high pressure; at the same time, the safety draw belt 2 can be freely pulled in the first limiting belt 3 and the second limiting belt 4. When the airbag body 1 moves in the pipeline, the force position and the force point are constantly changing. The safety draw belt 2 can adapt to the best force mode by continuously changing the length of the parts located on both sides of the airbag body 1, ensuring that each safety draw belt 2 can withstand uniform tension, and there will be no situation where one safety draw belt 2 is under excessive tension while the other safety draw belt 2 is not under stress.

[0030] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. 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 embodiments of the present invention.

Claims

1. A pipeline plugging airbag with a safety drawstring, characterized in that: The invention comprises an airbag body, a safety drawstring, a first limiting drawstring and a second limiting drawstring, wherein the safety drawstring crosses the rear part of the airbag body and the two ends extend to the two sides of the head part of the airbag body respectively, and two safety drawstrings are provided, and the two safety drawstrings cross each other at the rear part of the airbag body, and the parts of each safety drawstring located at the two sides of the airbag body extend along the generatrix of the airbag body and the four parts are evenly distributed in the circumferential direction of the airbag body; the first limiting drawstring is fixed at the rear part of the airbag body and forms a first limiting gap between the airbag body and the safety drawstring passes through the first limiting gap and can be freely drawn in the first limiting gap; the second limiting drawstring is fixed on the side of the airbag body and forms a second limiting gap between the airbag body and the safety drawstring passes through the second limiting gap and can be freely drawn in the second limiting gap.

2. The pipeline plugging airbag with a safety strap according to claim 1, characterized in that: The pipeline plugging airbag with a safety drawstring also includes a draw ring, and both ends of the safety drawstring are provided with a draw ring.

3. The pipeline plugging airbag with a safety strap according to claim 1, characterized in that: The pipeline plugging airbag with a safety drawstring also includes a quick connector. The interior of the airbag body is divided into a plurality of compartments, and the head of the airbag body is provided with a quick connector corresponding to each compartment.

4. The pipeline plugging airbag with a safety strap according to claim 1, characterized in that: Each safety drawstring is correspondingly provided with two groups of first limiting belts respectively located at two radial ends of the tail of the airbag body.

5. The pipeline plugging airbag with a safety drawstring according to claim 1, characterized in that: The safety drawstring is a strip-shaped belt and is laid flat on the surface of the airbag body.

6. The pipeline plugging airbag with a safety drawstring according to claim 1, characterized in that: The parts of each safety drawstring located at both sides of the airbag body are respectively provided with two groups of second limiting belts located at both ends of the generatrix of the airbag body.

7. The pipeline plugging airbag with a safety strap according to claim 1, characterized in that: The first limiting belt is a strip belt whose length direction is perpendicular to the radial direction of the tail of the airbag body and whose two ends are respectively fixed to the tail of the airbag body, and the first limiting gap is formed between the middle part of the first limiting belt and the airbag body; the second limiting belt is a strip belt whose length direction is perpendicular to the main line of the airbag body and whose two ends are respectively fixed to the side of the airbag body, and the second limiting gap is formed between the middle part of the second limiting belt and the airbag body.

8. The pipeline plugging airbag with a safety strap according to claim 1, characterized in that: The first limiting belt and the second limiting belt are both fixed on the airbag body by hot melting.

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