An inflatable expansion and shaping device for trenchless pipe lining repair

Abstract

This invention relates to the field of pipeline lining repair technology, providing an inflatable expansion and shaping device for trenchless pipeline lining repair. The device includes a rotating ring with multiple cleaning mechanisms arranged in a circumferential array on its outer side. An air supply assembly is located between the end positioning ring and the mounting cylinder. During trenchless pipeline partial lining repair, high-pressure gas is supplied through an external high-pressure air supply device via an injection nozzle and a T-shaped tee to the inside of the rotating ring. The gas inside the rotating ring is then ejected through a jet pipe on the connecting box, propelling the rotating ring to rotate rapidly outside the mounting cylinder. The rotating ring drives the multiple cleaning mechanisms to revolve. Under centrifugal force, the crank arm swings and unfolds, overcoming the spring force between the crank arm and the rotating shaft, allowing the brushes to rub and clean the area inside the pipe to be repaired, removing dirt and some protrusions. This allows the resin material to adhere tightly to the old pipe, improving the repair effect.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline lining repair technology, and in particular relates to an inflatable expansion and shaping device for trenchless pipeline lining repair. Background Technology

[0002] Trenchless pipeline repair technology is an engineering technique that repairs or replaces underground pipelines without extensive excavation. It is widely used in the maintenance of municipal drainage, water supply, gas, oil, and telecommunications pipeline systems, offering advantages such as short construction cycles, minimal environmental impact, and controllable costs. Among these techniques, lining repair is a key component of trenchless pipeline repair. A resin-impregnated flexible tube (such as fiberglass or polyester fiber) is fitted over an airbag device. A traction robot then pulls the tube into the old pipeline, and an external high-pressure inflation device inflates the airbag, causing the resin material to form a new lining that tightly adheres to the old pipe.

[0003] A search revealed an existing patent (publication number: CN213685804U) that discloses a large-diameter inner liner for trenchless pipeline repair. This patent, by installing a main bushing, an air-filled gasket A, an air-filled gasket B, a filling groove, a blocking device, and a barrier plate, allows the filler on the outside of the main bushing to be filled more fully and fixes the main bushing, thereby improving the efficiency and quality of repair. At the same time, it can prevent the filler from being lost, thus improving practicality.

[0004] However, in the above scheme, when carrying out pipeline repair work, when transporting the repair device to the pipeline repair section, the inner wall of the pipeline cannot be further cleaned before the pipeline is repaired. The dirt and some protruding foreign objects on the pipe wall make it difficult for the resin material to adhere tightly to the old pipe, reducing the repair effect. Utility Model Content

[0005] This utility model provides an inflatable expansion and shaping device for trenchless pipeline lining repair, which aims to solve the problem that current repair devices cannot further clean the inner wall of the pipeline before repair, thus reducing the repair effect.

[0006] This utility model is implemented as follows: an inflatable expansion and shaping device for trenchless pipe lining repair, comprising:

[0007] Two end positioning rings;

[0008] The mounting cylinder is bolted between the two end positioning rings;

[0009] An inflatable airbag is sleeved on the outside of the mounting cylinder. The inner sides of both ends of the inflatable airbag are fitted and sealed to the outer wall of the mounting cylinder, and an inflation cavity is formed between the inflatable airbag and the mounting cylinder.

[0010] A rotating ring is rotatably fitted onto one side of the outer wall of the mounting cylinder, and the interior of the rotating ring is hollow.

[0011] Several cleaning mechanisms are arranged in a circumferential array on the outside of the rotating ring;

[0012] The gas supply assembly, located between the end positioning ring and the mounting cylinder, is used to input gas into the rotating ring or the inflation chamber.

[0013] Preferably, the gas delivery assembly includes a gas injection nozzle fixedly installed on the outer wall of one of the end positioning rings, one end of the gas injection nozzle being connected to a T-shaped pipe, and the T-shaped pipe being sleeved inside the mounting cylinder.

[0014] Preferably, one end of the three-way T-tube extends to the inside of the inflation chamber, one end of the three-way T-tube is fixedly connected to the air injection nozzle, and another end of the three-way T-tube extends to the inside of the rotating ring.

[0015] Preferably, the three-way T-tube is equipped with solenoid valves at both the ports located inside the inflation chamber and the rotating ring.

[0016] Preferably, the cleaning mechanism includes a U-shaped plate fixed to the outer wall of the rotating ring, a crank rod rotatably connected to the inner side of the U-shaped plate via a rotating shaft, and a torsion spring connected between the crank rod and the U-shaped plate is provided on the outer side of the rotating shaft.

[0017] Preferably, the cleaning mechanism further includes a connecting box fixed to the rotating ring and fitting against the U-shaped plate, and the connecting box is connected to the inner space of the rotating ring.

[0018] Preferably, a jet pipe is fixedly connected to the outer wall of the connecting box on the side away from the U-shaped plate, for ejecting the gas that flows into the connecting box from the inside of the rotating ring.

[0019] Preferably, a brush is fixed to the end of the crank rod away from the U-shaped plate for cleaning the inner wall of the pipe to be repaired.

[0020] Preferably, the inner side of the mounting cylinder is hollowed out, and both end positioning rings are connected to the inner side of the mounting cylinder.

[0021] Preferably, the outer wall of the end positioning ring is fixedly connected to several brackets in a ring array, and each bracket is rotatably connected to a movable wheel on its inner side.

[0022] Compared with related technologies, the air-filled expansion and shaping device for trenchless pipe lining repair provided by this utility model has the following beneficial effects:

[0023] 1. In this utility model, a rotating ring is rotatably sleeved on the outer wall of one side of the mounting cylinder, and the rotating ring is hollow inside. Multiple cleaning mechanisms are arranged in a circumferential array on the outer side of the rotating ring. An air supply assembly is set between the end positioning ring and the mounting cylinder. During trenchless pipeline partial lining repair work, high-pressure gas can be introduced into the inner side of the rotating ring through an external high-pressure air supply device via an air injection nozzle and a T-shaped pipe. The gas inside the rotating ring is ejected through the air jet pipe on the connecting box, pushing the rotating ring to rotate rapidly on the outer side of the mounting cylinder. The rotating ring drives multiple cleaning mechanisms to revolve. At this time, under the action of centrifugal force, the crank rod swings and unfolds, overcoming the elastic force of the torsion spring between the crank rod and the rotating shaft, so that the brush can rub and clean the part to be repaired inside the pipe, removing dirt and some protrusions, so that the resin material can fit tightly with the old pipe, improving the repair effect.

[0024] 2. In this invention, after cleaning, the solenoid valve located inside the rotating ring is closed, and the external high-pressure inflation device is shut off. After the gas supply is removed, the torsion spring between the crank and the shaft causes the crank to flip and reset, completing the automatic folding and storage. Then, the solenoid valve located inside the inflation chamber is opened, and the external high-pressure inflation device delivers high-pressure gas through the injection nozzle and the three-way T-tube to the inside of the inflation chamber, inflating the airbag and causing the repair resin material on the outside of the airbag to expand and press against the tube wall. The operation is simple, practical, and convenient, with significant practical value. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a partial cross-sectional planar structural diagram of the present invention;

[0027] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0028] Figure 4 This is a schematic diagram of the structural composition of the cleaning mechanism of this utility model.

[0029] In the diagram: 1. End positioning ring; 2. Cleaning mechanism; 201. Air jet pipe; 202. Brush; 203. Crank rod; 204. Connecting box; 205. U-shaped plate; 206. Rotating shaft; 3. Bracket; 4. Moving wheel; 5. Inflatable airbag; 6. Rotating ring; 7. Air supply assembly; 701. Air inlet; 702. T-shaped pipe; 703. Solenoid valve; 8. Inflation chamber; 9. Mounting cylinder. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] Example 1

[0033] A preferred embodiment of the air-expansion and shaping device for trenchless pipe lining repair provided by this utility model is, for example... Figures 1 to 4 The image shows an inflatable expansion and shaping device for trenchless pipe lining repair, comprising: two end positioning rings 1; an installation cylinder 9 bolted between the two end positioning rings 1; an expansion airbag 5 sleeved on the outside of the installation cylinder 9, the inner sides of both ends of the expansion airbag 5 being sealed to the outer wall of the installation cylinder 9, forming an inflation chamber 8 between the expansion airbag 5 and the installation cylinder 9; a rotating ring 6 rotatably sleeved on one side of the outer wall of the installation cylinder 9, the rotating ring 6 having a hollow interior; several cleaning mechanisms 2 arranged in a circumferential array on the outside of the rotating ring 6; and an air supply assembly 7 disposed between the end positioning rings 1 and the installation cylinder 9 for inputting gas into the rotating ring 6 or the inflation chamber 8. The inner side of the installation cylinder 9 is hollow, and both end positioning rings 1 are connected to the inner side of the installation cylinder 9. Several supports 3 are fixed in a circumferential array on the outer wall of the end positioning rings 1, and each support 3 has a rotatably connected caster 4 on its inner side.

[0034] The inflatable airbag 5 and the outer wall of the mounting cylinder 9 can be bonded together with sealant. In actual operation, a constraint coil or other reinforcement method can be added to the outside of the connection between the inflatable airbag 5 and the mounting cylinder 9 to improve the tightness of the connection. This is existing technology and will not be elaborated on here.

[0035] During operation, the external high-pressure inflation device is activated, which delivers high-pressure gas through the gas delivery component 7 to the rotating ring 6 or the inflation chamber 8. When the gas is delivered to the rotating ring 6, it drives the cleaning mechanism 2 to rotate and clean the pipe wall. When the gas is delivered to the inflation chamber 8, it inflates the expansion bladder 5.

[0036] In a further preferred embodiment of the present invention, the gas delivery assembly 7 includes an air injection nozzle 701 fixedly installed on the outer wall of one of the end positioning rings 1. One end of the air injection nozzle 701 is connected to a three-way T-tube 702, which is sleeved inside the mounting cylinder 9.

[0037] Furthermore, one end of the T-shaped tube 702 extends into the inner side of the inflation chamber 8, and another end of the T-shaped tube 702 is fixedly connected to the air injection nozzle 701. The other end of the T-shaped tube 702 extends into the inner side of the rotating ring 6. Solenoid valves 703 are installed on both the ends of the T-shaped tube 702 located in the inflation chamber 8 and the inner side of the rotating ring 6.

[0038] In a further preferred embodiment of this utility model, the cleaning mechanism 2 includes a U-shaped plate 205 fixed to the outer wall of the rotating ring 6. A crank rod 203 is rotatably connected to the inner side of the U-shaped plate 205 via a rotating shaft 206. A torsion spring is provided on the outer side of the rotating shaft 206, connecting the crank rod 203 and the U-shaped plate 205. The purpose of providing the torsion spring is to apply a force to the rotating shaft 206 that can flip the crank rod 203 toward one side of the rotating ring 6, so that the crank rod 203 can be retracted and fitted against the outer wall of the rotating ring 6 when the rotating ring 6 is not rotating.

[0039] Furthermore, the cleaning mechanism 2 also includes a connecting box 204 fixed to the rotating ring 6 and fitted against the U-shaped plate 205, and the connecting box 204 is connected to the inner space of the rotating ring 6. An air jet pipe 201 is fixedly connected to the outer wall of the connecting box 204 on the side away from the U-shaped plate 205, for spraying out the gas that flows into the connecting box 204 from the inside of the rotating ring 6. A brush 202 is fixedly connected to the end of the crank 203 away from the U-shaped plate 205 for cleaning the inner wall of the pipe to be repaired.

[0040] In this embodiment, during the trenchless pipeline partial lining repair work, pre-prepared repair resin material is applied to the outer wall of the inflatable airbag 5. Then, the pipe on the external high-pressure inflation device is connected to the air delivery assembly 7, and the entire device is moved inside the pipeline by an external traction robot. The traction robot clamps the device using hooks or grippers and moves it using a traction rope; this is existing technology and will not be elaborated further. The support 3 and moving wheels 4 are used to assist in the movement inside the pipe. When approaching the lining repair position, first, the solenoid valve 703 located inside the rotating ring 6 is opened, and the external high-pressure inflation device is activated. High-pressure gas enters the inner side of the rotating ring 6 through the air injection nozzle 701 and the three-way T-tube 702. The gas inside the rotating ring 6 is ejected through the jet pipe 201 on the connecting box 204, pushing the rotating ring 6 to rotate rapidly outside the mounting cylinder 9. The rotating ring 6 drives multiple cleaning mechanisms 2 to revolve. At this time, under the action of centrifugal force, the crank 203 swings and unfolds (see reference). Figure 4 The brush 202 overcomes the elastic force of the torsion spring (not shown in the figure) between the crank 203 and the rotating shaft 206, enabling the brush 202 to rub and clean the part to be repaired inside the tube, removing dirt and some protrusions.

[0041] After cleaning, close the solenoid valve 703 located inside the rotating ring 6 and shut off the external high-pressure air supply equipment. After the gas supply is removed, the torsion spring between the crank 203 and the rotating shaft 206 causes the crank 203 to flip and reset (see reference). Figure 1 ).

[0042] It should be noted that the solenoid valve 703 can be a wireless remote control solenoid valve, intelligent electric valve, or other existing technologies commonly used for pipeline opening and closing. It can be remotely controlled for opening and closing, and is existing technology, so it will not be elaborated on here.

[0043] When repairing using the repair resin material fitted on the outside of the inflatable airbag 5, the solenoid valve 703 located inside the inflation chamber 8 is opened, and the external high-pressure inflation device is started. The external high-pressure inflation device delivers high-pressure gas through the air injection nozzle 701 and the three-way T-tube 702 to the inside of the inflation chamber 8 to inflate the inflatable airbag 5, thereby expanding and squeezing the repair resin material on the outside of the inflatable airbag 5 against the tube wall.

[0044] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0045] It should be understood that the disclosed apparatus can be implemented in other ways, as illustrated in the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of the units described above is only a logical functional division of an inflatable expansion and shaping device for trenchless pipe lining repair. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. An inflatable expansion profiling device for trenchless pipe in- place lining rehabilitation, characterized in that, include: Two end positioning rings (1); The mounting sleeve (9) is bolted between the two end positioning rings (1). An inflatable airbag (5) is sleeved on the outside of the mounting cylinder (9). The inner sides of both ends of the inflatable airbag (5) are sealed to the outer wall of the mounting cylinder (9), and an inflation cavity (8) is formed between the inflatable airbag (5) and the mounting cylinder (9). A rotating ring (6) is rotatably fitted onto the outer wall of one side of the mounting cylinder (9), and the interior of the rotating ring (6) is hollow. Several cleaning mechanisms (2) are arranged in a ring array on the outside of the rotating ring (6); The gas supply assembly (7) is disposed between the end positioning ring (1) and the mounting cylinder (9) for inputting gas into the rotating ring (6) or the inflation chamber (8).

2. An inflating expansion profiling device for trenchless pipe lining rehabilitation according to claim 1, characterized in that, The gas delivery assembly (7) includes an air injection nozzle (701) fixedly installed on the outer wall of one of the end positioning rings (1), one end of the air injection nozzle (701) is connected to a three-way T-tube (702), and the three-way T-tube (702) is sleeved inside the mounting cylinder (9).

3. An inflating expansion profiling device for trenchless pipe lining rehabilitation according to claim 2, characterized in that, One end of the three-way T-tube (702) extends to the inside of the inflation chamber (8), and one end of the three-way T-tube (702) is fixedly connected to the air injection nozzle (701). Another end of the three-way T-tube (702) extends to the inside of the rotating ring (6).

4. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 3, characterized in that, The three-way T-tube (702) is equipped with solenoid valves (703) on the ports located inside the air chamber (8) and the rotating ring (6).

5. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 4, characterized in that, The cleaning mechanism (2) includes a U-shaped plate (205) fixed to the outer wall of the rotating ring (6). A crank rod (203) is rotatably connected to the inner side of the U-shaped plate (205) via a rotating shaft (206). A torsion spring is provided on the outer side of the rotating shaft (206) and connected between the crank rod (203) and the U-shaped plate (205).

6. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 5, characterized in that, The cleaning mechanism (2) further includes a connecting box (204) fixed to the rotating ring (6) and attached to the U-shaped plate (205), and the connecting box (204) is connected to the inner space of the rotating ring (6).

7. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 6, characterized in that, A jet pipe (201) is fixedly connected to the outer wall of the connecting box (204) on the side away from the U-shaped plate (205), which is used to eject the gas that flows into the connecting box (204) from the inside of the rotating ring (6).

8. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 7, characterized in that, A brush (202) is fixed to the end of the crank (203) away from the U-shaped plate (205) for cleaning the inner wall of the pipe to be repaired.

9. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 2, characterized in that, The inner side of the mounting cylinder (9) is hollowed out, and the two end positioning rings (1) are connected to the inner side of the mounting cylinder (9).

10. The air-filled expansion and shaping device for trenchless pipe lining repair as described in claim 1, characterized in that, The outer wall of the end positioning ring (1) is fixed with several brackets (3) in a ring array, and each bracket (3) is rotatably connected to a moving wheel (4) on its inner side.

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