Trenchless in-situ pipe replacement construction device and method

Abstract

A trenchless in-situ pipe replacement construction device includes a pulling mechanism and a crushing mechanism. The pulling mechanism is used to pull the new pipe through the old pipe. The pulling mechanism includes a directional drill, a directional drill rod, and a traction rod. The ends of the traction rod are detachably connected to the new pipe and the directional drill rod, respectively. The crushing mechanism is used to crush the old pipe as the new pipe passes through it. The crushing mechanism includes a pneumatic hammer, a motor, and a rotating drum. The pneumatic hammer is mounted on the traction rod. The rotating drum rotates and is mounted on the outside of the new pipe. The motor is used to drive the rotating drum and is located inside the new pipe. While the pneumatic hammer crushes the old pipe and the pulling mechanism pulls the new pipe forward, the motor drives the rotating drum outside the new pipe to rotate. The rotating drum can squeeze the soil around the pipe and obstacles such as broken pipes, preventing damage to the outer wall of the new pipe caused by obstacles. It also prevents damage to the inner wall of the new pipe caused by obstacles falling into the new pipe after falling off.

Description

Technical Field

[0001] The invention relates to the technical field of pipe replacement using a pipe-breaking method, and in particular to a trenchless in-situ pipe replacement construction device and method. Background Art

[0002] The pipe-breaking method, an in-situ pipe replacement excavation method, offers advantages such as speed, efficiency, cost-effectiveness, environmental friendliness, and minimal ground disturbance. It primarily utilizes the existing pipe as a guide, using pipe-breaking equipment to break it up and simultaneously pull in a new pipe, enabling replacement of equal or expanded diameters.

[0003] Chinese patent "CN215981430U" discloses an in-situ pipe replacement device, system and expansion machine head using the static pulling pipe cracking method. The in-situ pipe replacement device using the static pulling pipe cracking method is provided with a pull rod. When the pull rod pulls the expansion machine head to drive the new pipe forward along the expansion hole, the grouting holes on the expansion machine head can grout the gap between the new pipe and the expansion hole. However, when the old pipe is broken by the actual pipe cracking method, obstacles such as the soil around the pipe and the broken pipe may fall off and fall into the new pipe, causing damage to the inner and outer walls of the new pipe. Summary of the Invention

[0004] In order to solve the technical problem in the prior art that obstacles such as soil around the pipe and broken pipes may fall off and fall into the new pipe, causing damage to the inner and outer walls of the new pipe, the present invention provides a trenchless in-situ pipe replacement construction device and method.

[0005] In order to solve the technical problem that obstacles such as soil around the pipe and broken pipes may fall off and fall into the new pipe, causing damage to the inner and outer walls of the new pipe, the present invention provides a technical solution: a non-excavation in-situ pipe replacement construction device, including a pulling mechanism and a crushing mechanism.

[0006] The pulling mechanism is used to pull the new pipeline so that the new pipeline passes through the old pipeline. The pulling mechanism includes a directional drilling rig, a directional drilling rod and a pulling rod. The two ends of the pulling rod are detachably connected to the new pipeline and the directional drilling rod respectively.

[0007] The crushing mechanism is used to crush the old pipe when the new pipe passes through the old pipe. The crushing mechanism includes a pneumatic hammer, a motor and a rotating drum. The pneumatic hammer is sleeved on the traction rod, the rotating drum rotates and sleeves on the outside of the new pipe, and the motor is used to drive the rotating drum to rotate and is set on the inside of the new pipe.

[0008] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: the crushing mechanism includes a positioning plate that is detachably arranged in the new pipe, an extension rod is passed through the center of the positioning plate, the extension rod is fixedly connected to the mounting plate, and the motor is fixedly arranged on the mounting plate.

[0009] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: a rubber ring is provided on the outer wall of the positioning plate.

[0010] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: the crushing mechanism includes a connecting pipe threadedly connected to the outside of the new pipe, the rotating drum is rotatably sleeved on the connecting pipe, and a fixed plate is detachably provided in the connecting pipe. The traction rod is fixedly connected to the center of the fixed plate, and a through hole is provided on the fixed plate for the output shaft of the motor to extend out. A gear connected to the output shaft is provided on the fixed plate near the outside of the new pipe, and the inner wall of the rotating drum is fixedly connected to an inner gear ring meshing with the gear.

[0011] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: a connecting sleeve is sleeved on the output shaft, and the connecting sleeve is connected to the output shaft through an insert rod.

[0012] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: the connecting pipe is connected to the rotating drum via a bearing.

[0013] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: a plurality of connecting strips are provided in the radial direction of the inner wall of the connecting pipe, and the connecting strips are connected to the fixing plate by bolts.

[0014] As a further optimization of the trenchless in-situ pipe replacement construction device of the present invention: spiral blades are provided on the outer wall of the rotating drum.

[0015] A trenchless in-situ pipe replacement construction method comprises the following steps:

[0016] S1: Dig several working wells on the pipeline path where the pipeline is to be laid;

[0017] S2: Measure and release the axis of the old pipeline, operate the directional drill to drill horizontally towards the old pipeline, and form a pilot hole during the drilling process;

[0018] S3: The pulling mechanism pulls the new pipe to pass through the old pipe. The crushing mechanism crushes the old pipe when the new pipe passes through it, and the crushed old pipe is pushed out of the way by rotating the drum.

[0019] S4: After completing the top dragging of a section of the pipeline, cement slurry is injected to fill the annular gap around the pipeline. After each section of grouting is completed, one pipe is pulled out and the next section of grouting is started. Grouting is continued in sequence until the end of the pipe section.

[0020] S5: After completing the section construction, the equipment is hoisted and recovered in the receiving well.

[0021] Beneficial effects: While the pneumatic hammer breaks the old pipe and the traction mechanism pulls the new pipe forward, the motor drives the rotating drum outside the new pipe to rotate. The rotating drum can squeeze the soil around the pipe and obstacles such as broken pipes, avoiding damage to the outer wall of the new pipe by the obstacles, and also avoiding damage to the inner wall of the new pipe caused by the obstacles falling off and falling into the new pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the rotating drum of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection between the output shaft of the motor and the gear;

[0025] Markings in the figure: 1. New pipe, 2. Positioning plate, 3. Extension rod, 4. Mounting plate, 5. Motor, 6. Connecting pipe, 7. Fixing plate, 8. Bolt, 9. Rotating drum, 10. Bearing, 11. Tractor, 12. Hammer, 13. Output shaft, 14. Gear, 15. Insert rod, 16. Connecting sleeve, 17. Spiral blade, 18. Internal gear ring, 19. Rubber ring, 20. Pneumatic impactor, 21. Directional drill pipe. DETAILED DESCRIPTION

[0026] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1-3 As shown, a trenchless in-situ pipe replacement construction device includes a pulling mechanism and a crushing mechanism. The pulling mechanism is used to pull the new pipe 1 through the old pipe. The pulling mechanism includes a directional drilling rig, a directional drill rod 21, and a pulling rod 11. The ends of the pulling rod 11 are detachably connected to the new pipe 1 and the directional drill rod 21, respectively. When replacing the new pipe 1, the directional drilling rig and the directional drill rod pull the pulling rod 11 to move, and the pulling rod 11 then pulls the new pipe 1 to move. By controlling the directional drilling rig, the movement direction of the new pipe 1 can be controlled and the new pipe 1 can move smoothly.

[0028] The crushing mechanism is used to crush the old pipe when the new pipe 1 passes through it. The crushing mechanism includes a pneumatic hammer 12, a motor 5, and a drum 9. The pneumatic hammer 12 is mounted on a traction rod 11. The drum 9 rotates and fits around the outside of the new pipe 1. The motor 5 is used to drive the drum 9 and is located inside the new pipe 1. When the old pipe is broken and replaced with the new pipe 1, the pneumatic hammer 12 crushes the old pipe. Simultaneously, the drum 9 rotates under the drive of the motor 5, squeezing debris generated by the pneumatic hammer 12 and obstacles such as soil around the pipe, displacing them. This prevents these obstacles from damaging the outer wall of the new pipe 1 when the new pipe 1 is pulled, falling into the inner wall of the new pipe 1 and damaging it, and from obstructing the flow inside the new pipe 1 after it is put into use, which could affect the performance of the new pipe 1. The outer wall of the drum 9 is provided with spiral blades 17. When the drum 9 rotates and squeezes surrounding obstacles, the spiral blades 17 guide the direction of the obstacles, preventing localized accumulation of obstacles and ensuring that the obstacles are displaced.

[0029] The present invention is described in detail below with reference to specific embodiments.

[0030] In order to achieve a better pulling effect and a more reasonable setting position for the motor 5, the crushing mechanism includes a positioning disc 2 that can be removably set in the new pipe 1. The presence of the positioning disc 2 can make the installation of subsequent components more accurate and convenient. The outer wall of the positioning disc 2 is sleeved with a rubber ring 19. The rubber ring 19 can increase the friction force of the outer wall of the positioning disc 2, making the positioning disc 2 more stable in the new pipe 1. An extension rod 3 is passed through the center of the positioning disc 2 to ensure that the moving trajectory when pulling the new pipe 1 is in a horizontal state. The extension rod 3 is fixedly connected to the mounting plate 4. The motor 5 is fixedly set on the mounting plate 4. The extension rod 3 extends from the positioning disc 2 and is fixedly connected to the mounting plate 4 at the open part of the new pipe 1. The setting of the mounting plate 4 can be used to fix the motor 5 that is to drive the drum 9 to rotate, so as to avoid damage to the inner wall of the new pipe 1 when the motor 5 is working, thereby affecting the use effect of the new pipe 1. The crushing mechanism also includes a connecting pipe 6 threadedly connected to the outside of the new pipe 1. The drum 9 is rotatably mounted on the connecting pipe 6. The connecting pipe 6 and the drum 9 are connected by a bearing 10. Since it is difficult to connect the new pipe 1 directly to the drum 9, the connecting pipe 6 can be threaded onto the outer wall of the new pipe 1 to connect the connecting pipe 6 to the drum 9. This is to reduce friction when the drum 9 rotates and to facilitate rotation. A removable fixing plate 7 is provided within the connecting pipe 6. Several connecting strips can be provided radially along the inner wall of the connecting pipe 6. The connecting strips are connected to the fixing plate 7 by bolts 8. At this point, the position of the motor 5 has been determined. If the fixing plate 7 is installed first, the motor 5 will be difficult to install on the mounting plate 4, which will increase the difficulty of subsequent operations. Therefore, the fixing plate 7 is installed after the position of the motor 5 is determined, making operation more convenient. The traction rod 11 is fixedly connected to the center of the fixing plate 7. The traction rod 11 can realize the function of pulling the new pipe 1 forward. The fixed connection at the center can also ensure that the movement of the new pipe 1 is always horizontal.

[0031] The fixed plate 7 is provided with a through hole through which the output shaft 13 of the motor 5 can extend. The fixed plate 7 is provided with a gear 14 connected to the output shaft 13 near the outside of the new pipe 1. The inner wall of the rotating drum 9 is fixedly connected with an inner gear ring 18 meshing with the gear 14. When the motor 5 is started, the output shaft 13 of the motor 5 will drive the gear 14 to rotate, and then the gear 14 drives the rotating drum 9 to rotate, squeezing the surrounding soil and obstacles such as broken pipe pieces. Therefore, the output shaft 13 of the motor 5 needs to extend to the gear 14. Accordingly, a through hole should be provided on the fixed plate 7 so that the output shaft 13 can extend out. The inner diameter of the through hole should be larger than the outer diameter of the output shaft 13 to ensure that the output shaft 13 can rotate normally. The inner wall of the rotating drum 9 is fixedly connected with an inner gear ring 18 meshing with the gear 14. Driven by the output shaft 13 of the motor 5, the gear 14 rotates in coordination with the inner gear ring 18, thereby driving the rotating drum 9 to rotate. A connecting sleeve 16 is sleeved on the output shaft 13 of the motor 5, and the connecting sleeve 16 is connected to the output shaft 13 by an insert rod 15. To ensure the working effect of the motor 5, when the output shaft 13 of the motor 5 drives the gear 14 and the inner ring gear 18 to rotate, the output shaft 13 extends out of the gear 14 part and is sleeved with the connecting sleeve 16. The insert rod 15 is inserted into the connecting sleeve 16 and the output shaft 13, ensuring the cooperation between the output shaft 13 and the gear 14.

[0032] The present invention also provides a trenchless in-situ pipe replacement construction method, comprising the following steps:

[0033] S1: Dig several working wells on the pipeline path where the pipeline is to be laid.

[0034] S2: Measure and release the axis of the old pipeline, operate the directional drill to drill horizontally towards the old pipeline, and form a pilot hole during the drilling process.

[0035] S3: The pulling mechanism pulls the new pipe 1 so that the new pipe 1 passes through the old pipe. The crushing mechanism crushes the old pipe when the new pipe 1 passes through the old pipe, and the crushed old pipe is removed by rotating the drum 9.

[0036] S4: After completing the top dragging of a section of pipeline, cement slurry is injected to fill the annular gap around the pipeline. After each section of grouting is completed, one pipe is pulled out and the next section of grouting is carried out. Grouting is continued in sequence until the end of the pipe section.

[0037] S5: After completing the section construction, the equipment is hoisted and recovered in the receiving well.

[0038] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A trenchless in-situ pipe replacement construction device, characterized by: Including pulling mechanism and crushing mechanism; The pulling mechanism is used to pull the new pipeline (1) so that the new pipeline (1) passes through the old pipeline. The pulling mechanism includes a directional drilling machine, a directional drilling rod (21) and a pulling rod (11). Both ends of the pulling rod (11) are detachably connected to the new pipeline (1) and the directional drilling rod (21). The crushing mechanism is used to crush the old pipe when the new pipe (1) passes through the old pipe. The crushing mechanism includes a pneumatic hammer (12), a motor (5) and a rotating drum (9). The pneumatic hammer (12) is sleeved on the traction rod (11). The rotating drum (9) rotates and sleeves on the outside of the new pipe (1). The motor (5) is used to drive the rotating drum (9) to rotate and is arranged on the inside of the new pipe (1). The crushing mechanism comprises a positioning plate (2) detachably arranged in the new pipe (1), an extension rod (3) passing through the center of the positioning plate (2), the extension rod (3) being fixedly connected to a mounting plate (4), and the motor (5) being fixedly arranged on the mounting plate (4); The crushing mechanism includes a connecting pipe (6) threadedly connected to the outside of the new pipe (1), a rotating drum (9) rotatably sleeved on the connecting pipe (6), a fixing plate (7) detachably provided in the connecting pipe (6), the traction rod (11) being fixedly connected to the center of the fixing plate (7), a through hole for allowing the output shaft (13) of the motor (5) to extend out is provided on the fixing plate (7), a gear (14) connected to the output shaft (13) is provided on the fixing plate (7) near the outside of the new pipe (1), and an inner gear ring (18) meshing with the gear (14) is fixedly connected to the inner wall of the rotating drum (9).

2. The trenchless in-situ pipe replacement construction device according to claim 1, characterized in that: The outer wall of the positioning plate (2) is sleeved with a rubber ring (19).

3. The trenchless in-situ pipe replacement construction device according to claim 1, characterized in that: A connecting sleeve (16) is sleeved on the output shaft (13), and the connecting sleeve (16) is connected to the output shaft (13) via an inserting rod (15).

4. The trenchless in-situ pipe replacement construction device according to claim 1, characterized in that: The connecting pipe (6) is connected to the rotating drum (9) via a bearing (10).

5. The trenchless in-situ pipe replacement construction device according to claim 4, characterized in that: A plurality of connecting strips are provided in the radial direction of the inner wall of the connecting pipe (6), and the connecting strips are connected to the fixing plate (7) via bolts (8).

6. The trenchless in-situ pipe replacement construction device according to claim 5, characterized in that: The outer wall of the rotating drum (9) is provided with spiral blades (17).

7. A trenchless in-situ pipe replacement construction method, based on the trenchless in-situ pipe replacement construction device according to claim 1, characterized in that: The following steps are involved: S1: Dig several working wells on the pipeline path where the pipeline is to be laid; S2: Measure and release the axis of the old pipeline, operate the directional drill to drill horizontally towards the old pipeline, and form a pilot hole during the drilling process; S3: The pulling mechanism pulls the new pipe (1) so that the new pipe (1) passes through the old pipe, and the crushing mechanism crushes the old pipe when the new pipe (1) passes through the old pipe, and the drum (9) rotates to push the crushed old pipe away; S4: After completing the top dragging of a section of the pipeline, cement slurry is injected to fill the annular gap around the pipeline. After each section of grouting is completed, one pipe is pulled out and the next section of grouting is started. Grouting is continued in sequence until the end of the pipe section. S5: After completing the section construction, the equipment is hoisted and recovered in the receiving well.

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