Crushing head and repairing system for municipal pipe network non-excavation cracked pipe method repairing

Abstract

The utility model discloses a crushing head for municipal pipe network non-excavation crack pipe method repair, which comprises a pipe head main body of a frustum with a small front part and a large rear part, a guide connecting rod used for being connected with a guide rod is arranged in the middle of the pipe head main body, and the guide connecting rod and the pipe head main body are coaxially arranged. At least two blades which extend in the diameter direction and are used for breaking an old pipe are arranged outside the pipe head body, and a pipe opening used for being connected with an updated pipeline is formed in the rear end of the pipe head body. The utility model further discloses a system for repairing the municipal pipe network through the non-excavation pipe cracking method. In a municipal pipe network, fracture of old pipes can be effectively achieved, and therefore normal repair is guaranteed.

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 crushing head and a repair system for repairing a municipal pipe network using a non-excavation pipe cracking method. Background Art

[0002] In order to reduce the impact, when the drainage pipes in the municipal pipe network are broken and repaired, a trenchless method will be used for repair. In Chinese patent CN106439218A, a 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.

[0003] Although the above structure is convenient for disassembly and suitable for different pipe cracking lengths, the whole device relies on the power box and power head on one side to provide power, and its power is unstable; when the device is used in the municipal underground drainage network, since most of the backfill materials around the pipeline are stone blocks, the success rate of pipe cracking is low, and it often encounters the phenomenon of jamming. The main reason for the jamming is that when encountering stones during the pipe cracking process, the pipe cutter is not easy to cut and the original pipe wall is not completely cut, resulting in the squeezing and accumulation of the pipe wall, which affects the installation of the pipe during the pipe cracking process, and there will be quality defects such as pipe fluctuation and water seepage. When encountering stones, manual excavation is basically adopted, which directly affects the construction efficiency. Therefore, the device is not applicable to municipal pipe networks. Utility Model Content

[0004] The utility model proposes a crushing head for repairing a municipal pipe network by a trenchless pipe cracking method, which can effectively realize the rupture of old pipes in the municipal pipe network, thereby ensuring the normal progress of the repair.

[0005] To this end, the technical solution adopted by the utility model is: a breaking head for repairing a municipal pipeline network using a trenchless pipe cracking method, comprising a pipe head main body which is arranged as a cone with a small front and a large rear, a guide connecting rod for connecting with the guide rod is arranged in the middle of the pipe head main body, and the guide connecting rod is arranged coaxially with the pipe head main body, at least two blades extending in the diameter direction and used for breaking old pipes are arranged outside the pipe head main body, and a pipe opening for connecting with an updated pipeline is arranged at the rear end of the pipe head main body.

[0006] As a preferred embodiment of the above scheme, a circular ring segment is provided at the rear end of the pipe head body to prevent 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.

[0007] Further preferably, the angle between the generatrix and the axis in the tube head body is between 15° and 20°.

[0008] Further preferably, the front end of the blade is configured as an angular straight blade.

[0009] Further preferably, the crushing head is made of a shock-absorbing steel plate made by a forging process.

[0010] Also disclosed is a municipal pipe network trenchless pipe cracking repair system, comprising the above-mentioned crushing head, wherein the front and rear ends of the crushing head are both provided with guide rods, 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 to move, 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 can realize the forward movement of the rear guide rod

[0011] Further preferably, the guide rod is composed of a plurality of short guide rods of equal length and connected by threads.

[0012] Further preferably, a plurality of weight-reducing holes are provided on the guide rod.

[0013] Further preferably, the pipe drawing machine is configured as a drawing jack, and the pipe jacking machine is configured as a hydraulic cylinder.

[0014] Beneficial effects of the utility model:

[0015] 1) The crushing head is equipped with multiple blades, and the front end of the blade is set as an angular straight knife, so that it is easier to cut the original pipe wall during the operation, and the degree of crushing is higher, so it is convenient to squeeze it into the soil, thereby ensuring the smooth progress of the repair operation and improving the operation efficiency.

[0016] 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 the force is greater, which can effectively prevent the occurrence of jamming and ensure normal operation, making the whole equipment more applicable in the municipal pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the crushing head in the utility model.

[0018] Figure 2 It is a schematic diagram of the repair system in the utility model.

[0019] 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. DETAILED DESCRIPTION

[0020] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0021] like Figure 1 As shown, a breaking head for repairing a municipal pipe network by a trenchless pipe cracking method 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 2 As shown, a municipal pipe network non-excavation pipe cracking repair system based on the use of the above-mentioned crushing head includes a crushing head 1, a guide rod 2, a pipe pulling machine 3 and a pipe jacking machine 4. 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. The pipe pulling machine 3 can pull the front guide rod 2 forward to move. A new pipe for replacing the old pipe is provided at the rear end of the crushing head 1, and the rear guide rod 2 is located in the new pipe. 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 realize the forward movement of the rear guide rod 2.

[0026] 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.

[0027] 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.

[0028] Preferably, the new pipe is composed of multiple short pipe sections, and the length of each short pipe section is the same as the length of the guide short rod, so that when each guide rod section is removed in the downstream well during operation, a short pipe section and a guide rod section need to be installed in the upstream well, and of course they can be multiples of each other.

Claims

1. A crushing head for repairing a municipal pipe network by a trenchless pipe cracking method, characterized in that: The invention comprises a pipe head body (1a) which is arranged in the shape of a cone with a small front and a large rear. A guide connecting rod (1b) for connecting with 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 the diameter direction and used for breaking old pipes are arranged outside the pipe head body (1a). A pipe opening (1d) for connecting with an updated pipe is arranged at the rear end of the pipe head body (1a).

2. The crushing head for repairing a municipal pipe network by a trenchless pipe cracking method according to claim 1, characterized in that: The rear end of the pipe head body (1a) is provided with a circular ring section (1e) for preventing the old pipe from shrinking after being broken, and the inner diameter of the circular ring section (1e) is not less than the outer diameter of the updated pipe.

3. The crushing head for repairing a municipal pipe network by a trenchless pipe cracking method according to claim 1 is characterized in that: The included angle between the generatrix and the axis of the pipe head body (1a) is between 15° and 20°.

4. The crushing head for repairing a municipal pipe network by a trenchless pipe cracking method according to claim 1 is characterized in that: The front end of the blade (1c) is configured as an angular straight blade.

5. The crushing head for repairing a municipal pipe network by a trenchless pipe cracking method according to claim 1 is characterized in that: The material of the crushing head (1) is a shock-absorbing steel plate made by a forging process.

6. A municipal pipe network trenchless pipe cracking repair system, characterized by: It comprises a crushing head (1) as described in any one of claims 1 to 5, wherein guide rods (2) are provided at both the front and rear ends of the crushing head (1), 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) forward to move, 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 a pipe jacking machine (4) fixed in an upstream well, and the pipe jacking machine (4) can realize the forward movement of the rear guide rod (2).

7. The municipal pipe network trenchless pipe cracking repair system according to claim 6, characterized in that: The guide rod (2) is composed of a plurality of guide short rods of equal length connected by threads.

8. The municipal pipe network trenchless pipe cracking repair system according to claim 6, characterized in that: The guide rod (2) is provided with a plurality of weight-reducing holes.

9. The municipal pipe network trenchless pipe cracking repair system according to claim 6, characterized in that: The pipe drawing machine (3) is configured as a drawing jack, and the pipe jacking machine (4) is configured as a hydraulic cylinder.

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