Underground pipeline breaking and regenerating device and method

Abstract

The invention discloses an underground pipeline breaking and regenerating device and method, and relates to the technical field of underground pipeline smashing and regenerating, the underground pipeline breaking and regenerating device comprises a jacking device, a breaking device for breaking old pipes and a pretreatment device which are connected in sequence, and a cutter head is arranged at the end, away from the breaking device, of the pretreatment device; the cutter head is provided with a hobbing cutter for cutting obstacles on the inner wall of an old pipe pipeline, the end, away from the crushing device, of the jacking device is connected with a new pipe, the crushing cutter can effectively crush the old pipe body through repeated opening and closing of the crushing cutter, and due to the fact that the crushing cutter penetrates out in the radial direction to crush the old pipe, the crushing efficiency is improved. According to the underground pipeline breaking regeneration device, radial force can be applied to old pipe residues, so that the old pipe residues move towards a radial soil body, blockage of the advancing underground pipeline breaking regeneration device is avoided, in addition, by arranging the pretreatment device and arranging a hob on the pretreatment device, obstacles on the inner wall of an old pipeline can be pre-cut, and blockage of the device is further avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of underground pipeline crushing and regeneration, and in particular to an underground pipeline crushing and regeneration device and method. Background Art

[0002] Underground pipelines (such as water, drainage, gas, heat, and oil pipelines) can become corroded, aged, leaked, and cracked over time, requiring timely replacement. Traditional excavation and replacement methods are time-consuming, costly, and cause significant damage to surface transportation and the environment.

[0003] Trenchless pipeline repair technology has emerged, among which in-situ pipe bursting is a highly effective method. Its principle is to use mechanical force or hydrostatic force to break up the old pipe while simultaneously pulling in a new pipe of the same or larger diameter. Existing in-situ pipe bursting devices mainly include pipe pulling and push-in types:

[0004] Pipe-pulling method: A pulling device (such as a winch) is installed in the working pit at the end of the old pipeline, and a crushing head is installed in the working pit at the starting end. The crushing head is pulled from the starting end to the end using a traction cable, simultaneously breaking the old pipe and pulling in the new pipe. The disadvantages are that a working pit is required at the end, the traction force transmission efficiency is low over long distances, the cable strength requirements are high, and it is prone to deviation.

[0005] Push-type: A jacking device (such as a pipe jacking machine) is installed in the starting working pit to push the crushing head forward. However, traditional pipe jacking machines are bulky, limiting their applicability to smaller-diameter pipes. Furthermore, as the crushing head advances, broken pipe debris and soil accumulate in front of it, causing the equipment to become clogged and unable to move forward. This necessitates digging a pit above for repairs, significantly impacting repair efficiency. Existing in-situ pipe replacement devices still have room for improvement in terms of compactness, propulsion efficiency, and ease of construction.

[0006] Therefore, it is necessary to develop and design underground pipeline breaking and regeneration devices and methods, which have good guidance, avoid equipment blockage, high crushing efficiency, are suitable for smaller pipe diameters and are easy to operate. These are technical problems that technical personnel in this field urgently need to solve. Summary of the Invention

[0007] In order to solve the above problems, the present invention provides an underground pipeline breaking and regeneration device and method, which has good guidance, avoids equipment blockage, has high crushing efficiency, is suitable for smaller pipe diameters and is easy to operate.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] The utility model provides a kind of underground pipeline breaking and regenerating device, including jacking device, the crushing device of old pipe crushing and preprocessing device connected in sequence, the cutter head is provided at the end of the preprocessing device away from the crushing device, the hob that the cutter head is provided is cut to old pipe inner wall barrier, the jacking device is connected with new pipe at the end of the crushing device away from the crushing device, the crushing device includes the support cylinder body that is provided with cutter telescopic slot, the hydraulic device that is arranged in the support cylinder body, the crushing cutter that is connected with the output end of the hydraulic device and can extend the telescopic slot.

[0010] Preferably, the circumferential direction of the cutter head is provided with a guide wheel that is in sliding fit with the inner wall of the old pipe.

[0011] Preferably, the guide wheel is provided as at least two, and is uniformly arranged in the circumferential direction of the cutter head.

[0012] Preferably, an inclined surface is provided on the crushing cutter near the end of the preprocessing device, and the angle between the inclined surface and the extension direction towards the jacking device is an acute angle.

[0013] Preferably, the crushing cutter is provided as at least two, and is uniformly arranged along the circumferential direction of the support cylinder body.

[0014] Preferably, the outer diameter of the support cylinder body is smaller than the inner diameter of the old pipe, and the extended outer diameter of the crushing cutter is greater than the inner diameter of the old pipe.

[0015] Preferably, the jacking device includes a conical cylinder body and a hydraulic cylinder arranged in the conical cylinder body, the output end of the hydraulic cylinder is connected with the crushing device, and the conical cylinder body is connected with the new pipe away from the output end of the hydraulic cylinder.

[0016] Preferably, the outer wall of the conical cylinder body is uniformly provided with four support shoes in the circumferential direction, and the support shoes can be extended out of or into the conical cylinder body through the telescopic device arranged in the conical cylinder body.

[0017] Preferably, a conical surface is provided on the conical cylinder body near the crushing device, the angle between the conical surface and the extension direction towards the connection end of the jacking device and the new pipe is an acute angle, the small-diameter end of the conical surface is smaller than the inner diameter of the old pipe, and the large-diameter end of the conical surface is greater than the inner diameter of the old pipe.

[0018] The utility model also discloses an underground pipeline breaking and regenerating method, which applies the underground pipeline breaking and regenerating device as described above, and the main steps are as follows:

[0019] Excavate a working pit at the starting end of the old pipeline;

[0020] Send the preprocessing device and the crushing device into the entrance section of the old pipeline, and set the jacking device outside the old pipeline.

[0021] The cutter head of the pretreatment device rotates, and the crushing cutter of the crushing device is in a retracted state;

[0022] The jacking device is controlled to push the crushing device to advance;

[0023] The crushing cutter of the crushing device is extended to crush the old pipe body;

[0024] After crushing, the crushing cutter is retracted, and the jacking device continues to jacking, so as to extrude the crushed old pipe body into the soil layer;

[0025] The new pipe is connected to the end of the jacking device away from the crushing device, and the output end of the jacking device is fully extended and then starts to retract, and under the friction force of the crushing device and the crushed old pipe and wall surface, the jacking device is driven to advance; the new pipe is dragged into the position of the old pipe.

[0026] The present application has the following technical effects relative to the prior art:

[0027] Through repeated opening and closing of the crushing cutter, the crushing cutter can effectively crush the old pipe body, and since the crushing cutter is radially penetrated to crush the old pipe, radial force can be applied to the old pipe residue, so that the old pipe residue moves towards the radial soil body, avoiding blocking of the underground pipe breaking and regenerating device, in addition, by providing the pretreatment device and the hob provided on the pretreatment device, obstacles on the inner wall of the old pipe can be pre-cut, preventing impact damage to the cutter head of the crushing device, reducing the risk of equipment jamming and maintenance frequency, and avoiding the problem of pipe breaking and regenerating device blockage caused by obstacle accumulation, which cannot advance. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] FIG. 1 is a schematic diagram of the overall structure of the underground pipe breaking and regenerating device disclosed by the present application; Figure 1 FIG. 1 is a schematic diagram of the overall structure of the underground pipe breaking and regenerating device disclosed by the present application;

[0030] Among them, 1, pretreatment device; 2, crushing device; 3, jacking device; 4, inclined surface. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide an underground pipeline breaking and regeneration device and method, which has good guidance, avoids equipment blockage, has high breaking efficiency, is suitable for smaller pipe diameters and is easy to operate.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] refer to Figure 1 The underground pipeline breaking and regeneration device disclosed in the embodiment of the present invention at least includes a jacking device 3, one end of the jacking device 3 is connected to the new pipe, and the other end is connected to the crushing device 2, the crushing device 2 is used to crush the old pipe, and the end of the crushing device 2 away from the jacking device 3 is provided with a pretreatment device 1, the pretreatment device 1 and the crushing device 2 are both located inside the old pipe, and the end of the pretreatment device 1 away from the crushing device 2 is provided with a cutter disc, and the cutter disc is provided with a roller cutter for cutting obstacles on the inner wall of the old pipe. The crushing device 2 includes a supporting cylinder with a tool expansion groove, and a hydraulic device is provided inside the supporting cylinder. The output end of the hydraulic device is connected to the crushing tool, and the output end of the hydraulic device can be extended and retracted along the radial direction of the supporting cylinder. The crushing device 2 can be pushed into and pulled out of the expansion groove by the hydraulic device. The telescopic groove is a strip-shaped through hole arranged on the outer wall of the supporting cylinder. Under the action of the hydraulic device, the crushing tool can be pushed out of the telescopic groove to crush the old pipe body. After repeated opening and closing of the crushing tool, the crushing tool can effectively crush the old pipe body. Since the crushing tool penetrates from the radial direction to crush the old pipe, radial force can be applied to the old pipe residue to move the old pipe residue toward the radial soil, avoiding blockage of the advancing underground pipeline breaking and regeneration device. In addition, by setting up a pretreatment device 1 and setting a roller on the pretreatment device 1, obstacles on the inner wall of the old pipe can be pre-cut to prevent them from causing impact damage to the cutter head of the crushing device 2, reducing the risk of equipment jamming and maintenance frequency, and avoiding the problem of pipeline breaking and regeneration device being blocked due to accumulation of obstacles and unable to move forward.

[0035] It should be noted that the pretreatment device 1 is internally provided with a driving device for driving the cutter disc to rotate, and the driving device is a driving motor; the hob is a wedge-shaped hob with a blade having a wedge angle of 30° to 45° and a diamond composite sheet embedded in the tip of the blade.

[0036] refer to Figure 1In one embodiment, a guide wheel that slides with the inner wall of the old pipe is provided on the circumference of the cutter disc. There are at least two guide wheels that are evenly distributed on the circumference of the blade. By providing the guide wheels, not only can the entire underground pipeline breaking and regeneration device be guided, reducing the resistance during the movement, but also the abutment between the guide wheels and the inner wall of the old pipe can ensure the stability of the entire device during movement, so that the device can move along the center of the old pipe body.

[0037] refer to Figure 1 As an implementation method, an inclined surface 4 is provided on the crushing tool near one end of the pretreatment device 1. The angle between the inclined surface 4 and the extension direction toward the jacking device 3 is an acute angle. The acute angle design makes the force direction and the movement direction of the crushing tool form a reasonable pressure angle, ensuring that the driving force is mainly transmitted along the crushing direction, reducing the tool vibration or deviation caused by the lateral force component, and reducing the resistance of the crushing tool.

[0038] refer to Figure 1 As a preferred method, at least two crushing tools are set, and the crushing tools are evenly distributed along the circumference of the support cylinder. By evenly distributing the crushing tools around the circumference of the support cylinder, the force on the support cylinder can be evenly distributed during the crushing process, and the crushing effect of the old pipe can be improved.

[0039] refer to Figure 1 As a preferred method, the outer diameter of the support cylinder is smaller than the inner diameter of the old pipe, the extended outer diameter of the crushing tool is larger than the inner diameter of the old pipe, and the outer diameter of the support cylinder is smaller than the inner diameter of the old pipe, so that the support cylinder can move freely in the old pipe to avoid pipe deformation or sediment jamming, and the crushing tool is extended into the support cylinder when not in use, and extended out of the support cylinder when in use, and the extended diameter is larger than the diameter of the old pipe, which is not only convenient for storage, but also can ensure the crushing effect of the old pipe.

[0040] refer to Figure 1 As an implementation method, the jacking device 3 includes a conical cylinder, a hydraulic cylinder is arranged inside the conical cylinder, the output end of the hydraulic cylinder is connected to the crushing device 2, and the output end of the hydraulic cylinder is extended and retracted along the axial direction of the conical cylinder. By arranging the hydraulic cylinder inside the conical cylinder, the crushing device 2 can be driven to move toward the inside of the old pipe, thereby realizing the advancement of the entire device.

[0041] It should be noted that a clamping device is provided at the connection between the conical cylinder and the new pipe, and the clamping device is used to clamp the new pipe. The clamping device can be a splint, and the new pipe is clamped by the splint to complete the dragging of the new pipe.

[0042] refer to Figure 1As an implementation method, four support shoes are evenly distributed on the circumference of the outer wall of the conical cylinder. The support shoes can be extended or extended into the conical cylinder through a telescopic device arranged inside the conical cylinder. By arranging the support shoes, when the jacking device 3 pushes the crushing device 2 and the pretreatment device 1, the support shoes can support the inner wall of the excavated working pit, thereby achieving stable support for the jacking device 3 and ensuring stability during the pushing process.

[0043] refer to Figure 1 As an embodiment, a conical surface is provided at one end of the conical cylinder near the crushing device 2, and the angle between the conical surface and the extension direction of the connection end of the jacking device 3 and the new pipe is an acute angle. The small diameter end of the conical surface is smaller than the inner diameter of the old pipe, and the large diameter end of the conical surface is larger than the inner diameter of the old pipe. Through the conical surface provided by the conical cylinder, when the output end of the jacking device 3 outputs to the maximum limit, the hydraulic cylinder controls the piston rod in the hydraulic cylinder to retract. Since the piston rod is connected to the crushing device 2 through the flange, and at this time there is a certain friction between the crushing device 2 and the side wall of the old pipe after crushing, the jacking device 3 will be driven to move toward the crushing device 2. At this time, the crushed old pipe body can be squeezed into the surrounding soil layer during the advancement through the conical surface.

[0044] It should be noted that the jacking device 3 adopts a three-stage telescopic double-acting hydraulic cylinder. In order to further ensure that the jacking device 3 can move toward the crushing device 2, a propulsion device is provided at the end of the jacking device 3 away from the crushing device 2 to realize the movement of the jacking device 3. The propulsion device and the jacking device 3 may not be connected, and the movement of the jacking device 3 can be realized through the telescopic end of the propulsion device.

[0045] The present invention also discloses a method for breaking and regenerating an underground pipeline, which uses the above-mentioned underground pipeline breaking and regenerating device, and the main steps are as follows:

[0046] Excavate a working pit at the starting end of the old pipe;

[0047] Place the new pipe next to the working pit;

[0048] Fix the propulsion device in the working pit. The propulsion device is used to push the underground pipeline breaking and regeneration device and the new pipe body into the old pipe body. Connect the pretreatment device 1, the crushing device 2 and the jacking device 3 of the device in sequence.

[0049] Send the pretreatment device 1 and the crushing device 2 into the old pipe inlet section, connect the jacking device 3 to the high-pressure hose of the hydraulic cylinder, the oil pipe of the hydraulic motor, the hydraulic pump station and the control console on the ground;

[0050] The support shoe of the jacking device 3 extends to support the jacking device 3;

[0051] In the initial state, the piston rod in the hydraulic system of the jacking device 3 is in a retracted state, and the tail end is in contact with the propulsion device;

[0052] During the propulsion stroke, the cutter head of the pre-processing device 1 rotates, and the crushing cutter of the crushing device 2 is in a retracted state;

[0053] The piston rod of the jacking device 3 is controlled to extend. At this time, since the front end of the piston rod is fixed to the crushing device 2, the extension of the piston rod directly pushes the crushing device 2 and the pre-treatment device 1 forward;

[0054] The guide wheel of the pre-treatment device 1 ensures that the forward direction is along the axis of the old pipe;

[0055] After being pushed a certain distance, the jacking device 3 is maintained, and the crushing cutters on the circumference of the crushing device 2 are extended to crush the old pipe body;

[0056] After crushing, the crushing cutter is retracted, the support shoe is retracted, and the piston rod of the jacking device 3 continues to extend. After the piston rod of the jacking device 3 is fully extended, it begins to retract. Since the front end of the jacking device 3 is connected to the crushing device 2, the crushing device 2 is under the action of the friction force with the inner wall of the old pipe at the original position. The positions of the crushing device 2 and the pretreatment device 1 remain basically unchanged. Therefore, the jacking device 3 will be pulled forward a stroke distance, and the broken old pipe body will be squeezed into the soil layer through the conical surface;

[0057] And if the friction force is not large enough (in this case, a propulsion device is needed), the tail of the jacking device 3 can be connected to the new pipe body with the help of the propulsion device, and the other end of the new pipe body can be connected to the propulsion device;

[0058] As the unit advances, the new pipe is dragged into place of the old pipe.

[0059] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed therein. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. An underground pipeline breaking and regeneration device, characterized in that: It includes a jacking device, a crushing device for crushing the old pipe and a pretreatment device connected in sequence. The pretreatment device is provided with a cutter disc at the end away from the crushing device. The cutter disc is provided with a roller for cutting obstacles on the inner wall of the old pipe. The jacking device is connected to the new pipe at one end away from the crushing device. The crushing device includes a supporting cylinder with a tool telescopic groove, a hydraulic device arranged inside the supporting cylinder, and a crushing tool connected to the output end of the hydraulic device and capable of extending out of the telescopic groove.

2. The underground pipeline breaking and regeneration device according to claim 1, characterized in that: A guide wheel is provided on the circumference of the cutter disc and is in sliding engagement with the inner wall of the old pipe.

3. The underground pipeline breaking and regeneration device according to claim 2, characterized in that: The number of the guide wheels is at least two and they are evenly distributed in the circumferential direction of the cutter disc.

4. The underground pipeline breaking and regeneration device according to claim 3, characterized in that: An inclined surface is provided on one end of the crushing tool close to the pre-processing device, and an angle between the inclined surface and the extension direction toward the jacking device is an acute angle.

5. The underground pipeline breaking and regeneration device according to claim 4, characterized in that: At least two crushing tools are provided, and the crushing tools are evenly distributed along the circumference of the supporting cylinder.

6. The underground pipeline breaking and regeneration device according to claim 5, characterized in that: The outer diameter of the supporting cylinder is smaller than the inner diameter of the old pipe, and the extended outer diameter of the crushing tool is larger than the inner diameter of the old pipe.

7. The underground pipeline breaking and regeneration device according to claim 1, characterized in that: The jacking device includes a conical cylinder and a hydraulic cylinder arranged inside the conical cylinder. The output end of the hydraulic cylinder is connected to the crushing device, and the output end of the conical cylinder away from the hydraulic cylinder is connected to the new pipe.

8. The underground pipeline breaking and regeneration device according to claim 7, characterized in that: Four supporting shoes are evenly distributed on the circumference of the outer wall of the conical cylinder. The supporting shoes can be extended into or out of the conical cylinder through a telescopic device arranged inside the conical cylinder.

9. The underground pipeline breaking and regeneration device according to claim 8, characterized in that: The conical cylinder is provided with a conical surface at one end close to the crushing device, and the angle between the conical surface and the extension direction toward the connecting end of the jacking device and the new pipe is an acute angle. The small diameter end of the conical surface is smaller than the inner diameter of the old pipe, and the large diameter end of the conical surface is larger than the inner diameter of the old pipe.

10. A method for breaking and regenerating underground pipelines, characterized in that: The underground pipeline breaking and regeneration device according to any one of claims 1 to 9 is used, and the main steps are as follows: Excavate a working pit at the starting end of the old pipeline; The pretreatment device and crushing device are sent into the inlet section of the old pipe, and the jacking device is set outside the old pipe; The cutter head of the pre-treatment device rotates, and the crushing cutter of the crushing device is in the retracted state; Control the jacking device to push the crushing device forward; The crushing cutter of the crushing device extends to crush the old pipe body; After crushing, the crushing cutter is retracted and the jacking device continues to push the broken old pipe into the soil layer; Connect the new pipe to the end of the jacking device away from the crushing device. After the output end of the jacking device is fully extended, it begins to retract. Under the action of the friction between the crushing device, the crushed old pipe and the wall, the jacking device is driven forward; the new pipe is dragged into the position of the old pipe.

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