Repair system capable of accurately positioning non-excavation cracked pipe of municipal pipe network

Abstract

The utility model discloses a municipal pipe network trenchless cracked pipe repairing system capable of accurately positioning, which comprises a crushing head, guide rods are arranged at the front end and the rear end of the crushing head, the front end of the guide rod on the front side penetrates through a pipe drawing machine fixed in a downstream well, and the pipe drawing machine can pull the guide rod on the front side to move forwards. A new pipe used for replacing an old pipe is arranged at the rear end of the crushing head, the guide rod on the rear side is located in the new pipe, a pipe jacking machine fixed in an upstream well is arranged at the rear end of the guide rod on the rear side, and the pipe jacking machine pushes the guide rod on the rear side and the new pipe to move forwards. A positioning device used for determining the positions of the guide rod and the new pipe is arranged between the guide rod and the rear end of the new pipe, and the positioning device has an adjusting function so that the positioning device can adapt to the new pipes with different pipe diameters. And in the non-excavation cracked pipe repair of the municipal pipe network, not only can the center of the pipeline be prevented from greatly deviating, but also the device can be used for pipe networks with different sizes.

Description

Technical Field

[0001] The utility model belongs to the technical field of non-excavation repair devices for municipal pipe networks, and in particular relates to a repair system for non-excavation cracked pipes of municipal pipe networks that can accurately locate the pipes. Background Art

[0002] In order to reduce the impact, when the drainage pipe in the municipal pipe network is broken and repaired, a trenchless method will be used for repair. In Chinese patent CN106439218A, a cracked pipe repair device is disclosed, and specifically disclosed, including a pipe clamp, a pipe cutter, a pull rod, a support frame, a power head and a power box. One end of the pipe clamp is hinged with the pipe cutter, and the other end clamps the new pipe; the side of the pipe cutter away from the pipe clamp is fixedly connected to one end of the pull rod, the power head is placed on the support frame, and the other end of the pull rod is connected to the power head. The power head pulls the pull rod to move, and the pull rod pulls the pipe cutter to cut the broken old pipe; the power box is connected to the power head through a line to transmit power source to the power head. At the same time, the patent also discloses that a support ring is arranged in the new pipe to ensure that the new pipe will not deviate. However, in this structure, since the new pipe has different specifications, different sizes of support pipes are required for new pipes of different sizes, which leads to many types of support rings and inconvenient management. Utility Model Content

[0003] The utility model proposes a repair system for a municipal pipe network trenchless cracked pipe that can accurately locate the pipe network. In the trenchless cracked pipe repair of the municipal pipe network, it can not only avoid a large deviation of the pipe center, but also be used for pipe networks of different sizes.

[0004] To this end, the technical solution adopted by the utility model is: a repair system for municipal pipeline network cracked pipes that can be accurately positioned without excavation, comprising a crushing head, wherein guide rods are arranged at both the front and rear ends of the crushing head, the front end of the front guide rod passes through a pipe pulling machine fixed in a downstream well, and the pipe pulling machine can pull the front guide rod forward, and the rear end of the crushing head is provided with a new pipe for replacing the old pipe, and the rear guide rod is located in the new pipe, and the rear end of the rear guide rod is provided with a pipe jacking machine fixed in the upstream well, and the pipe jacking machine pushes the rear guide rod and the new pipe forward, and a positioning device for determining the position of the guide rod and the new pipe is arranged between the guide rod and the rear end of the new pipe, and the positioning device has an adjustment function to adapt it to new pipes of different diameters.

[0005] As a preferred embodiment of the above scheme, the positioning device includes a fixed block and at least two supporting blocks, the fixed block is provided with a supporting hole for the guide rod to pass through, each supporting block is arranged on the fixed block through a corresponding telescopic rod, and the supporting block is used to support the new pipe and is arc-shaped.

[0006] Further preferably, the guide rod is composed of a plurality of guide short rods of equal length and connected by threads, and each guide short rod is provided with a plurality of weight-reducing holes.

[0007] Further preferably, the crushing head includes a pipe head body configured as a small front and large rear cone, a guide connecting rod for connecting to the guide rod is provided in the middle of the pipe head body, and the guide connecting rod is coaxially arranged with the pipe head body, at least two blades extending in the diameter direction and used to break the old pipe are provided outside the pipe head body, and the rear end of the pipe head body is provided with a pipe opening for connecting to the updated pipeline.

[0008] Further preferably, the angle between the generatrix and the axis in the tube head body is between 15° and 20°.

[0009] Further preferably, the front end of the blade is configured as an angular straight blade.

[0010] Further preferably, the crushing head is made of a shock-absorbing steel plate made by a forging process.

[0011] Further preferably, a circular ring segment is provided at the rear end of the pipe head body for preventing the old pipe from shrinking after rupture, and the inner diameter of the circular ring segment is not less than the outer diameter of the updated pipe.

[0012] Beneficial effects of the utility model:

[0013] 1) A positioning device is provided between the rear guide rod and the rear end of the new pipe, and is fixed on the crushing head at the front end of the new pipe, so that during the process of pipe jacking and guide rod dragging, the position of the pipe can be synchronously controlled from head to tail to ensure that the axis is always in the predetermined position, avoiding a large deviation of the center of the pipe, and realizing accurate positioning of the axis, effectively avoiding quality and safety problems such as bursting of the new pipe, pipe ups and downs, and excessive jacking force; at the same time, the positioning device has an adjustment function to adapt it to the repair of pipe networks with different pipe diameters.

[0014] 2) A pipe jacking machine and a pipe pulling machine are provided in the repair system, and during the whole process, a guide rod is provided between the pipe jacking machine and the pipe pulling machine, so that they can work together from two directions during operation, and their force is greater, which can effectively prevent the occurrence of jamming and ensure normal operation, making the whole equipment more suitable for environments with more gravel such as municipal pipe networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the repair system in the utility model.

[0016] Figure 2 It is a schematic diagram of the positioning device in the utility model.

[0017] Figure 3 It is a schematic diagram of the crushing head in the utility model.

[0018] Figure numerals: crushing head-1, pipe head body-1a, guide connecting rod-1b, blade-1c, pipe mouth-1d, circular ring segment-1e, guide rod-2, pipe pulling machine-3, pipe jacking machine-4, support block-5, fixing block-6, support hole-6a, telescopic rod-7. DETAILED DESCRIPTION

[0019] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0020] like Figure 1 As shown, a repair system for non-excavation cracked pipes in a municipal pipeline network can be accurately positioned, which is mainly composed of a crushing head 1, a guide rod 2, a pipe pulling machine 3, a pipe jacking machine 4 and a positioning device. Guide rods 2 are provided at both the front and rear ends of the crushing head 1, and the front end of the front guide rod 2 passes through the pipe pulling machine 3 fixed in the downstream well, and the pipe pulling machine 3 can pull the front guide rod 2 to move forward, and the rear end of the crushing head 1 is provided with a new pipe for replacing the old pipe, and the rear guide rod 2 is located in the new pipe, and the rear end of the rear guide rod 2 is provided on the pipe jacking machine 4 fixed in the upstream well, and the pipe jacking machine 4 can push the rear guide rod 2 and the new pipe to move forward.

[0021] Since the rear ends of the guide rod and the new pipe are only supported by the jacking pipe, in order to prevent the rear ends of the guide rod and the new pipe from shifting, a positioning device for determining the positions of the guide rod and the new pipe is provided between the rear guide rod 2 and the rear end of the new pipe, and the positioning device has an adjustment function to adapt to new pipes of different diameters.

[0022] like Figure 2 As shown, the positioning device includes a fixed block 6 and at least two support blocks 5. The fixed block 6 is provided with a support hole 6a for the guide rod 2 to pass through. Each support block 5 is provided on the fixed block 6 through a corresponding telescopic rod 7. The support block 5 is used to support the new pipe and is in an arc shape. To prevent damage to the new pipe, a pad for contacting the new pipe is provided on the outside of the support block.

[0023] The telescopic rod can be a manual structure or an electric structure as required, wherein the manual structure can be composed of a multi-section telescopic rod, and the specific telescopic structure can be two sleeves with external threads that are slidably connected, and at the same time, in order to achieve the fixation of the two sleeves after sliding, a nut that can be tightened on the two sleeves is also provided, or two sleeves that are slidably connected are used, and multiple through holes are arranged at intervals on at least one sleeve, and the length is fixed by a pin that passes through the two sleeves, wherein the pin can be a bolt assembly. When it is an electric structure, a three-jaw chuck structure can be adopted.

[0024] To facilitate disassembly and adapt to different lengths, the guide rod is composed of a number of equal-length guide short rods connected by threads. To reduce weight, a number of weight-reducing holes are provided on the guide rod 2, and the guide rod is set as a hollow rod. Preferably, the guide rod is made of manganese steel.

[0025] Preferably, the pipe drawing machine 3 is configured as a pulling jack, and the pipe jacking machine 4 is configured as a hydraulic cylinder. When in use, when the hydraulic pressure of the hydraulic cylinder exceeds the allowable range value, the operation must be stopped immediately to find the problem and deal with it.

[0026] Preferably, the new pipe is composed of multiple short pipes, and the length of each short pipe is the same as the length of the guide short rod, so that during the operation, when each guide rod is removed in the downstream well, a short pipe and a guide rod need to be installed in the upstream well. When each short pipe is installed, the positioning device needs to be reinstalled. Of course, the length of each short pipe and the length of the guide short rod can also be multiples of each other.

[0027] like Figure 3 As shown, the crushing head 1 is mainly composed of a pipe head body 1a, a guide connecting rod 1b, a blade 1c and a pipe mouth 1d. The pipe head body 1a is configured as a frustum with a small front and a large rear, a guide connecting rod 1b for connecting with the guide rod is provided in the middle of the pipe head body 1a, and the guide connecting rod 1b is coaxially arranged with the pipe head body 1a, the front end of the guide connecting rod extends forward from the pipe head body, and the rear end of the guide connecting rod can be located in the pipe head body or can extend backward beyond the pipe head body.

[0028] In order to break the old pipe, at least two blades 1c extending in the diameter direction and used to break the old pipe are arranged outside the pipe head body 1a. To ensure the breaking effect, the front end of the blade 1c is set as an angular straight knife.

[0029] To facilitate the fixation of the new pipe, a pipe opening 1d for connecting to the updated pipe is provided at the rear end of the pipe head body 1a. At the same time, a circular ring segment 1e is provided at the rear end of the pipe head body 1a to prevent the old pipe from shrinking after rupture. The inner diameter of the circular ring segment 1e is not less than the outer diameter of the updated pipe, so that the new pipe is located between the circular ring segment and the pipe opening.

[0030] To facilitate the movement of the crushing head, the angle between the busbar and the axis in the pipe head body 1a is between 15°-20°, making its front end smaller and increasing its strength. The material of the crushing head 1 is selected as a shock-absorbing steel plate made by a forging process, so that it has better toughness.

Claims

1. A repair system for municipal pipe network cracks that can accurately locate without excavation, characterized by: The invention comprises a crushing head (1), wherein the front and rear ends of the crushing head (1) are both provided with guide rods (2), the front end of the front guide rod (2) passes through a pipe pulling machine (3) fixed in a downstream well, and the pipe pulling machine (3) can pull the front guide rod (2) to move forward, the rear end of the crushing head (1) is provided with a new pipe for replacing the old pipe, and the rear guide rod (2) is located in the new pipe, the rear end of the rear guide rod (2) is provided with a pipe jacking machine (4) fixed in an upstream well, and the pipe jacking machine (4) can push the rear guide rod (2) and the new pipe to move forward, and a positioning device for determining the position of the guide rod and the new pipe is provided between the guide rod (2) and the rear end of the new pipe, and the positioning device has an adjustment function so that it can adapt to new pipes of different diameters; The positioning device comprises a fixed block (6) and at least two support blocks (5); the fixed block (6) is provided with a support hole (6a) for the guide rod (2) to pass through; each support block (5) is arranged on the fixed block (6) via a corresponding telescopic rod (7); the support block (5) is used to support the new pipe and is arc-shaped.

2. The municipal pipe network trenchless crack repair system capable of accurately locating cracks according to claim 1, characterized in that: The guide rod (2) is composed of a plurality of guide short rods of equal length connected by threads, and each guide short rod is provided with a plurality of weight-reducing holes.

3. The municipal pipe network trenchless crack repair system capable of accurate positioning according to claim 1, characterized in that: The crushing head (1) comprises a pipe head body (1a) which is arranged as a cone with a small front and a large rear. A guide connecting rod (1b) for connecting to a guide rod is arranged in the middle of the pipe head body (1a), and the guide connecting rod (1b) is arranged coaxially with the pipe head body (1a). At least two blades (1c) extending in a diameter direction and used for breaking old pipes are arranged outside the pipe head body (1a). A pipe opening (1d) for connecting to an updated pipeline is arranged at the rear end of the pipe head body (1a).

4. The municipal pipe network trenchless crack repair system capable of accurate positioning according to claim 3, characterized in that: The included angle between the generatrix and the axis of the pipe head body (1a) is between 15° and 20°.

5. The municipal pipe network trenchless crack repair system capable of accurate positioning according to claim 3, characterized in that: The front end of the blade (1c) is configured as an angular straight blade.

6. The municipal pipe network trenchless crack repair system capable of accurately locating a crack according to claim 3, characterized in that: The material of the crushing head (1) is a shock-absorbing steel plate made by a forging process.

7. The municipal pipe network trenchless crack repair system capable of accurate positioning according to claim 3, characterized in that: The rear end of the pipe head body (1a) is provided with a circular ring segment (1e) for preventing the old pipe from shrinking after being broken, and the inner diameter of the circular ring segment (1e) is not less than the outer diameter of the updated pipe.

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