Water stopping air bag for underground pipeline non-excavation repair

Abstract

The utility model relates to the field of pipeline maintenance, in particular to a water stop air bag for underground pipeline non-excavation repair, which comprises an air bag component and an inflation valve connected to one end of the air bag component, an annular concave buffer portion is arranged in the middle of the air bag component, and the air bag component is divided into a first blocking portion and a second blocking portion by the annular concave buffer portion. The air bag assembly comprises an air bag inner layer and an elastic wear-resistant outer layer, a plurality of connecting belts are annularly arrayed on the outer surface of the air bag inner layer, and one end of each connecting belt is connected with the inner wall of the elastic wear-resistant outer layer. The air bag assembly is divided into the two independent blocking parts through the annular concave buffering part, even if one blocking part is damaged, the other blocking part can still keep a certain sealing effect, so that it is ensured that repairing work is conducted smoothly, the abrasion-resistant and impact-resistant capacity of the air bag is further enhanced through the abrasion-resistant and impact-resistant assembly, and the service life of the air bag assembly is prolonged. And therefore, complex environmental conditions in the pipeline can be better coped with.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline maintenance field especially underground pipeline non -excavation repair is with water stop air bag. BACKGROUND

[0002] Underground pipeline non -excavation repair is with water stop air bag is a kind of sealing device for temporarily closing pipeline in the process of pipeline repair or replacement, its core function is to block water flow or gas leakage under the condition that the ground above pipeline is not damaged, provide safe environment for subsequent repair operation, such as lining repair, pipe replacement etc., it forms temporary sealing barrier in pipeline by inflation, isolates the section to be repaired from external environment, to close the water, sewage, gas or other fluids in pipeline, prevent leakage pollution environment or affect construction safety.

[0003] For the related technology in the above, the inventor finds that when air bag forms temporary sealing barrier in pipeline by inflation, isolates the section to be repaired from external environment, its surface is in close contact with the inner wall of pipeline, but because the inner wall of pipeline has scale, corrosion product or construction residue, the surface of air bag contacts with it, especially under the use of air bag for a long time, its surface is prone to local ulcerated wear condition even lead to damage, thereby affecting the water blocking effect of air bag, in addition, due to the particularity of part of construction pipeline, especially the high pressure characteristics of internal fluid, its fluid often generates sustained impact force to one end of air bag, thereby easily leading to a certain position displacement of air bag, and part of seepage phenomenon occurs, affect the construction condition of pipeline repair. UTILITY MODEL CONTENT

[0004] The utility model mainly solves the technical problem to provide a kind of underground pipeline non -excavation repair is with water stop air bag, improves the water blocking effect of air bag, and prevents air bag from displacement in pipeline, guarantees construction stability.

[0005] To solve the above technical problem, one technical scheme of the utility model is: provide a kind of underground pipeline non -excavation repair is with water stop air bag, including: air bag assembly and the inflation valve body connected at its one end, the middle of the air bag assembly is equipped with annular recessed buffer part, the annular recessed buffer part separates air bag assembly into first barrier part and second barrier part;

[0006] The air bag assembly includes air bag inner layer and elastic wear-resistant outer layer, the outer surface of the air bag inner layer is annular array with several connection bands, one end of the connection band is respectively connected with the inner wall of elastic wear-resistant outer layer, the surface of the air bag inner layer is in close contact with the inner wall of elastic wear-resistant outer layer when it is full of gas, and the outer wall of the elastic wear-resistant outer layer is in close contact with pipe wall;

[0007] It further includes wear-resistant impact-resistant assembly connected on the surface of air bag assembly.

[0008] By adopting the technical scheme, when fluid in the pipeline generates high pressure impact on one end of the air bag, the recess can absorb impact energy through elastic deformation, and the risk of damage to the air bag can be reduced by dispersing the impact force. The air bag assembly is divided into two independent barrier parts by the annular recess, which can further enhance the sealing performance of the air bag. Even if one of the barrier parts is damaged, the other barrier part can still maintain a certain sealing effect, thereby ensuring the smooth progress of the repair work. The inner layer of the air bag is tightly attached to the outer layer after being inflated, forming a double-layer sealing interface and gradually expanding to tightly contact the inner wall of the pipeline. Even if the outer layer is locally damaged due to wear, the inner layer can still maintain the basic sealing function. The connecting belt uniformly transmits the radial stress generated by the air pressure of the outer layer to the inner layer, avoiding local stress concentration caused by tearing, and enhancing the overall structural strength of the air bag to prevent sealing failure caused by separation of the inner and outer layers. The wear-resistant and impact-resistant assembly further enhances the wear resistance and impact resistance of the air bag, enabling it to better cope with complex environmental conditions inside the pipeline.

[0009] In a preferred example, the wear-resistant and impact-resistant assembly can further include annular elastic protrusions spaced apart and connected to the surfaces of the first barrier part and the second barrier part, respectively. An annular array of elastic anti-skid blocks is provided on the surface of the elastic wear-resistant outer layer between any two adjacent annular elastic protrusions. The elastic anti-skid blocks are respectively provided with clearance gaps at both ends of the annular elastic protrusions. The elastic anti-skid blocks are respectively inclined. The adjacent elastic anti-skid blocks in the axial direction of the air bag assembly are respectively opposite and staggered. After the air bag assembly expands, the annular elastic protrusions and the elastic anti-skid blocks are in close contact with the pipe wall.

[0010] By adopting the above technical scheme, the annular elastic protrusions further enhance the contact area and tightness between the air bag and the inner wall of the pipeline, while providing certain buffering and pressure resistance. When the air bag expands, the annular elastic protrusions can tightly contact the inner wall of the pipeline, effectively preventing fluid from penetrating between the air bag and the pipe wall. In addition, the annular elastic protrusions can also play a buffering role when subjected to fluid impact, reducing the risk of displacement and damage of the air bag. The elastic anti-skid blocks increase the friction between the air bag and the inner wall of the pipeline, preventing the air bag from sliding or shifting in the pipeline. The elastic anti-skid blocks can form multiple contact points with the inner wall of the pipeline after the air bag expands, thereby increasing the friction and improving the stability of the air bag. At the same time, the inclined elastic anti-skid blocks can further increase the anti-skid effect of the air bag, ensuring that the air bag maintains the correct position in the pipeline.

[0011] The utility model discloses in a preferable example can be further configured as: the wear -resisting impact -resistant assembly includes the elastic spiral wear -resisting ring that connects respectively on the first barrier part surface and the second barrier part surface, the spiral direction of two elastic spiral wear -resisting ring is set up respectively opposite, the spiral clearance of elastic spiral wear -resisting ring is equipped with a plurality of elastic antiskid block no.

[0012] Through adopting above-mentioned technical scheme, the elastic spiral wear -resisting ring is made of wear -resisting material, enhances the wear resistance of air bag assembly when moving in pipeline or being impacted by fluid, prolongs the service life of air bag, and its spiral structure makes the wear -resisting ring can disperse and absorb energy when being impacted, thereby improving the impact resistance of air bag, in addition, the opposite spiral direction makes two wear -resisting rings can produce greater friction when contacting the inner wall of pipeline, helps to keep the stable position of air bag in pipeline, prevents slipping, and the inclined elastic antiskid block no.

[0013] The utility model discloses in a preferable example can be further configured as: the air bag assembly is close to the one side symmetry of inflating valve body and is connected with handle no.

[0014] Through adopting above-mentioned technical scheme, through holding handle no., the position and direction of air bag can be controlled more stably by operating personnel, ensures that air bag can be placed accurately in the pipeline section needing to be repaired, simultaneously, when disassembling air bag, handle no. also provides the convenient holding point, makes operating personnel can take out air bag from pipeline easily, and handle no. still can be used to provide an additional fixed point after the inflation of air bag, to prevent air bag from moving in pipeline due to fluid pressure.

[0015] The utility model discloses in a preferable example can be further configured as: the both ends of air bag assembly are hemispherical respectively, and the first barrier part and the second barrier part are arc respectively close to the one side of annular recessed buffer part.

[0016] By adopting the technical scheme, the curvature radius of the semispherical edge can absorb high-frequency vibration energy, reduce the probability of fatigue crack initiation, and the semispherical structure can better disperse stress when subjected to pressure, reduce the damage risk caused by local stress concentration, enhance the overall structural strength of the air bag assembly, enable the air bag assembly to withstand greater fluid pressure, and the transition area between the arc-shaped barrier part and the annular recessed buffer part is smoother, which helps to reduce the turbulence and vortex phenomenon of the fluid in the area, thereby reducing the risk of leakage.

[0017] In a preferred example, the sum of twice the length of the annular recessed buffer part is less than the length of the first barrier part and the second barrier part.

[0018] By adopting the technical scheme, the air bag assembly can uniformly distribute pressure when inflated, avoiding structural damage caused by excessive local stress, and the first barrier part and the second barrier part can provide better support, enhancing the overall structural stability of the air bag.

[0019] In summary, the utility model discloses at least one of the following beneficial technical effects of the water stop air bag for trenchless repair of underground pipelines:

[0020] 1. The annular recessed buffer part separates the air bag assembly into two independent barrier parts, which can further enhance the sealing performance of the air bag. Even if one barrier part is damaged, the other barrier part can still maintain a certain sealing effect, ensuring the smooth progress of the repair work. The wear-resistant and impact-resistant assembly further enhances the wear resistance and impact resistance of the air bag, enabling it to better cope with complex environmental conditions inside the pipeline.

[0021] 2. When the air bag is inflated, the annular elastic protrusion can tightly fit the inner wall of the pipeline, effectively preventing fluid from seeping between the air bag and the pipe wall. In addition, the annular elastic protrusion can also act as a buffer when subjected to fluid impact, reducing the displacement and damage risk of the air bag. The elastic anti-skid block one forms multiple contact points with the inner wall of the pipeline to increase friction, further increasing the anti-skid effect of the air bag and ensuring that the air bag maintains the correct position in the pipeline.

[0022] 3. The opposite arrangement of the spiral direction enables the two wear-resistant rings to generate greater friction when contacting the inner wall of the pipeline, which helps to maintain the stable position of the air bag in the pipeline and prevent slipping. The obliquely arranged elastic anti-skid block two can further increase the friction between the air bag and the inner wall of the pipeline, ensuring that the air bag maintains stable sealing effect even in the case of high fluid pressure in the pipeline or complex pipeline shape. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort, wherein:

[0024] Figure 1 It is a structural schematic view of the embodiment 1 of the present application.

[0025] Figure 2 It is a sectional view of A-A in the embodiment 1 of the present application. Figure 1

[0026] Figure 3 It is a structural schematic view of the embodiment 2 of the present application.

[0027] In the drawings: 10, air bag assembly; 2, inflation valve body; 3, annular recess buffer part; 4, first barrier part; 5, second barrier part; 60, wear-resistant and impact-resistant assembly; 7, handle one; 8, handle two;

[0028] 11, air bag inner layer; 12, elastic wear-resistant outer layer; 13, connecting belt;

[0029] 61, annular elastic protrusion; 62, elastic anti-skid block one; 63, elastic spiral wear-resistant ring; 64, elastic anti-skid block two. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application will be described below in conjunction with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0031] It should be noted that these drawings are all simplified schematic views, and only illustrate the basic structure of the present application in a schematic manner, and thus only show the relevant components of the present application.

[0032] Embodiment 1

[0033] Referring to Figure 1 and Figure 2 ​The utility model discloses a kind of underground pipeline non-excavation repair water stop air bags, comprising: air bag assembly 10 and the inflation valve body 2 connected at its one end, air bag assembly 10 is symmetrically connected with handle one 7 on the side close to inflation valve body 2, and handle two 8 is connected on the other side, annular recess buffer portion 3 is equipped in the middle of air bag assembly 10, annular recess buffer portion 3 separates air bag assembly 10 into first barrier portion 4 and second barrier portion 5, the two ends of air bag assembly 10 are hemispherical respectively, the side close to annular recess buffer portion 3 of first barrier portion 4 and second barrier portion 5 is arc-shaped respectively, the length of annular recess buffer portion 3 is twice respectively less than the length of first barrier portion 4 and second barrier portion 5, air bag assembly 10 includes air bag inner layer 11 and elastic wear-resistant outer layer 12, the outer surface of air bag inner layer 11 annular array has several connecting bands 13, one end of connecting band 13 is connected with the inner wall of elastic wear-resistant outer layer 12 respectively, the surface of air bag inner layer 11 is in close contact with the inner wall of elastic wear-resistant outer layer 12 when it is full of gas, and the outer wall of elastic wear-resistant outer layer 12 is in close contact with pipe wall, further including wear-resistant impact-resistant component 60 connected on the surface of air bag assembly 10;

[0034] inflation valve body 2 is connected with air bag inner layer 11, air bag inner layer 11 is made of high-elasticity synthetic rubber, such as hydrogenated nitrile rubber HBR, elastic wear-resistant outer layer 12 is composed of multiple composite materials, such as polyester fiber fabric, polyurethane coating and fluorine rubber film, which are fixedly connected with the inner wall of outer layer by hot-pressing process, air bag inner layer 11 is tightly attached to elastic wear-resistant outer layer 12 after inflation, forming a double-layer sealed interface, and when elastic wear-resistant outer layer 12 is locally damaged due to wear, air bag inner layer 11 can still maintain the basic sealing function, when the fluid in the pipeline generates high pressure impact on first barrier portion 4, annular recess buffer portion 3 provides elastic energy storage space and absorbs impact energy through elastic deformation, reducing the local stress peak value, and at the same time, the hemispherical end portion can smoothly transition the pressure in the pipeline, in addition, wear-resistant impact-resistant component 60 further enhances the wear resistance and impact resistance of the air bag, thereby ensuring the smooth progress of the repair work.

[0035] wear-resistant impact-resistant component 60 includes annular elastic protrusions 61 spaced apart on the surface of first barrier portion 4 and second barrier portion 5 respectively, and elastic anti-skid blocks one 62 annular arrayed on the surface of elastic wear-resistant outer layer 12 are arranged between adjacent two annular elastic protrusions 61, the two ends of elastic anti-skid blocks one 62 are formed with a clearance respectively, and the elastic anti-skid blocks one 62 are respectively arranged obliquely, the adjacent two elastic anti-skid blocks one 62 in the axial direction of air bag assembly 10 are respectively arranged oppositely and staggeredly, and the annular elastic protrusions 61 and elastic anti-skid blocks one 62 are in close contact with the pipe wall after air bag assembly 10 is inflated;

[0036] The annular elastic protrusion 61 is made of fluorinated modified silicone rubber with a hardness of 80-90 Shore A. It is formed by vulcanization through a mold to improve its oxidation resistance. When the airbag assembly 10 expands, the annular elastic protrusion 61 is subjected to radial stress by the reverse compression of the pipe wall, forming a multi-point contact seal to prevent leakage caused by uneven pipe walls. The elastic deformation of the annular elastic protrusion 61 can avoid stress concentration that could cause material rupture. It can also act as a buffer when subjected to fluid impact, reducing the displacement and damage risk of the airbag. In addition, the elastic anti-slip block 62 has an inclination angle of 30° to 45°, and the axially adjacent elastic anti-slip blocks 62 are in opposite directions, further increasing the anti-slip effect of the airbag and ensuring that the airbag maintains the correct position in the pipeline. Since a clearance gap is formed between the elastic anti-slip block 62 and the annular elastic protrusion 61, it can maintain its flexibility under long-term pressure.

[0037] Example 2

[0038] Reference Figure 2 and Figure 3 Based on Embodiment 1, this utility model provides a technical solution:

[0039] The wear-resistant and impact-resistant component 60 includes elastic spiral wear-resistant rings 63 respectively connected to the surfaces of the first barrier part 4 and the second barrier part 5. The spiral directions of the two elastic spiral wear-resistant rings 63 are respectively arranged in opposite directions. A plurality of elastic anti-slip blocks 64 connected to the surface of the elastic wear-resistant outer layer 12 are respectively provided on the spiral gap of the elastic spiral wear-resistant rings 63. The elastic anti-slip blocks 64 are respectively inclined, and the elastic anti-slip blocks 64 on the surface of the first barrier part 4 and the elastic anti-slip blocks 64 on the second barrier part 5 are respectively arranged in opposite directions.

[0040] The first barrier part 4 and the second barrier part 5 have the same surface pitch but opposite leads, which allows the elastic spiral wear-resistant ring 63 to disperse and absorb energy when subjected to impact force, thereby improving the impact resistance of the airbag assembly 10 and preventing damage from external impact. The opposite spiral direction allows the two elastic spiral wear-resistant rings 63 to generate greater friction when in contact with the inner wall of the pipe, which helps to maintain the stable position of the airbag assembly 10 in the pipe and prevent slippage. When the airbag assembly 10 is subjected to impact force, the elastic anti-slip block 64 can act as an additional support point to disperse and absorb the impact force, thereby protecting the airbag from damage.

[0041] The implementation principle of the embodiment is: in use, the inner wall of the pipeline is cleaned by using a high-pressure cleaning device or a corresponding cleaning tool to remove impurities such as sand, silt, and stones, so as to ensure that the inner wall of the pipeline is flat and smooth, then the air bag assembly 10 is placed in the corresponding repaired pipeline section, then the inflation valve body 2 of the air bag assembly 10 is connected to the air pump, and whether the connection is firm is checked, the position of the air bag assembly 10 is adjusted by using the handle one 7 and the handle two 8, it is ensured that the air bag assembly 10 completely covers the pipeline section to be repaired, then the air pump is used for inflation, then the inner layer 11 of the air bag gradually expands and is tightly attached to the elastic wear-resistant outer layer 12 to form a double-layer sealing interface, at this time, the wear-resistant and impact-resistant assembly 60 on the surface of the air bag assembly 10 forms a multi-point contact seal with the inner wall of the pipeline, and the frictional force generated can resist the side pressure of the water flow on the air bag, so as to realize the water stopping effect, and in the process of water stopping, the air bag assembly 10 is prevented from deviating to ensure that the air bag assembly 10 maintains the correct position in the pipeline, and the first blocking part 4 and the second blocking part 5 form a double-sealing structure to further improve the sealing effect, in addition, the hemispherical design of the end part of the air bag assembly 10 can also reduce the turbulence and vortex phenomenon of the fluid around the air bag, reduce the fluid resistance, and improve the sealing performance.

[0042] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation according to the content of the utility model specification, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A waterproof airbag for trenchless repair of underground pipelines, characterized in that, include: An airbag assembly (10) and an inflation valve body (2) connected to one end thereof, wherein an annular recessed buffer portion (3) is provided in the middle of the airbag assembly (10), and the annular recessed buffer portion (3) divides the airbag assembly (10) into a first barrier portion (4) and a second barrier portion (5). The airbag assembly (10) includes an inner airbag layer (11) and an elastic wear-resistant outer layer (12). The outer surface of the inner airbag layer (11) has a plurality of connecting strips (13) arranged in a ring. One end of each connecting strip (13) is connected to the inner wall of the elastic wear-resistant outer layer (12). When the inner airbag layer (11) is filled with gas, its surface is in close contact with the inner wall of the elastic wear-resistant outer layer (12), and the outer wall of the elastic wear-resistant outer layer (12) is in close contact with the tube wall. It also includes a wear-resistant and impact-resistant component (60) attached to the surface of the airbag assembly (10).

2. The waterproof airbag for trenchless repair of underground pipelines according to claim 1, characterized in that, The wear-resistant and impact-resistant component (60) includes annular elastic protrusions (61) that are spaced apart on the surfaces of the first barrier (4) and the second barrier (5). Between two adjacent annular elastic protrusions (61), there are elastic anti-slip blocks (62) arranged in annular array on the surface of the elastic wear-resistant outer layer (12). The two ends of the elastic anti-slip blocks (62) form clearance gaps with the annular elastic protrusions (61). The elastic anti-slip blocks (62) are respectively inclined. Two adjacent elastic anti-slip blocks (62) in the axial direction of the airbag component (10) are respectively opposite and staggered. After the airbag component (10) is inflated, the annular elastic protrusions (61) and the elastic anti-slip blocks (62) are respectively in close contact with the tube wall.

3. The waterproof airbag for trenchless repair of underground pipelines according to claim 1, characterized in that, The wear-resistant and impact-resistant component (60) includes elastic spiral wear-resistant rings (63) respectively connected to the surface of the first barrier part (4) and the surface of the second barrier part (5). The spiral directions of the two elastic spiral wear-resistant rings (63) are respectively arranged in opposite directions. A plurality of elastic anti-slip blocks (64) connected to the surface of the elastic wear-resistant outer layer (12) are respectively provided on the spiral gap of the elastic spiral wear-resistant rings (63). The elastic anti-slip blocks (64) are respectively inclined, and the elastic anti-slip blocks (64) on the surface of the first barrier part (4) and the elastic anti-slip blocks (64) on the second barrier part (5) are respectively arranged in opposite directions.

4. A waterproof airbag for trenchless repair of underground pipelines according to claim 1, characterized in that, The airbag assembly (10) has a handle 1 (7) symmetrically connected to one side of the airbag assembly (10) near the inflation valve body (2), and a handle 2 (8) connected to the other side.

5. A waterproof airbag for trenchless repair of underground pipelines according to claim 1, characterized in that, The two ends of the airbag assembly (10) are hemispherical, and the first barrier (4) and the second barrier (5) are respectively arc-shaped on the side near the annular recessed buffer (3).

6. A waterproof airbag for trenchless repair of underground pipelines according to claim 1, characterized in that, The sum of twice the length of the annular recessed buffer portion (3) is less than the lengths of the first barrier portion (4) and the second barrier portion (5), respectively.

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