Longitudinal cutting device for inner wall of pipeline

Abstract

The utility model relates to the technical field of pipeline repair, in particular to a longitudinal cutting device for the inner wall of a pipeline. Comprising a base, a rolling assembly is arranged on the base, a second telescopic rod is rotationally connected to the upper end of the base, a cutting assembly is fixed to the telescopic end of the second telescopic rod, and the second telescopic rod is connected with the base through a first telescopic rod. In the process that the cutter of the cutting device cuts the lining pipe, the top wheels on the two sides of the cutter can tightly abut against the lining pipe, and the stability performance of the cutting device is good in the process of cutting the lining pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline repair, in particular to a pipeline inner wall longitudinal cutting device. Background Art

[0002] In daily life, drainage pipes often have problems such as aging and leakage. Traditional drainage pipe repair methods often require excavation of the ground, causing damage and waste, and bringing unnecessary losses to the environment and residents. The emergence of drainage pipe UV curing repair technology has changed this situation. UV curing is a trenchless repair method that uses ultraviolet light to cure the impregnated resin hose pulled into the original pipe to form a pipe liner. It is one of the in-situ curing pipe repair technologies.

[0003] However, repair failures may occur during the UV-curing pipeline repair process, such as incorrect liner size or liner damage. After the repair fails, the cured pipeline needs to be cut and pulled out of the original pipeline. When the liner of a small-diameter (less than 600mm) pipeline needs to be removed, it cannot be removed from the outside due to other reasons (such as municipal pipelines that have been buried underground), and the pipeline diameter is small, so personnel cannot enter the pipeline. As a result, the liner cannot be removed and is inconvenient to replace.

[0004] The patent document with application number CN202122890156.X discloses a device for longitudinally cutting the inner wall of a small-diameter pipe. When the device enters the pipe, the telescopic rod of the telescopic cylinder is extended, so that the support tube drives the cutter to tilt forward, thereby reducing the overall height of the cutting device to facilitate entry into the pipe. The bracket is sent to the specified position in the pipe by the push-pull rod, and the camera can be extended into the pipe. The situation of the cutter inside the pipe is observed according to the image information displayed on the display located outside the pipe and electrically connected to the camera. Then the cutter and the telescopic cylinder are started, so that the telescopic rod of the telescopic cylinder is slowly retracted. When the cutting blade of the cutter reaches the cutting depth, the telescopic cylinder stops retracting to ensure that the cutting blade of the cutter can effectively cut the pipe. Then, the bracket is pushed and pulled back and forth in the pipe through the push-pull rod to complete the cutting construction.

[0005] During the liner pipe cutting process, the device can only adjust the inclination angle of the support tube through the telescopic rod to change the height of the cutting blade. It is suitable for small-diameter pipes. When the inner diameter of the liner pipe is large, it is not suitable for large-diameter liner pipes due to the small height adjustment range of the cutting blade. When the cutting blade cuts the liner pipe, it is necessary to pull the cutting device to move in the pipe. The device cannot be effectively stabilized and has poor stability during operation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a longitudinal cutting device with good stability and applicable to pipes with different diameters.

[0007] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0008] A device for longitudinally cutting the inner wall of a pipeline comprises a base, a rolling assembly is arranged on the base, a second telescopic rod is rotatably connected to the upper end of the base, a cutting assembly is fixed to the telescopic end of the second telescopic rod, and the second telescopic rod is connected to the base through the first telescopic rod; the cutting assembly comprises a shell, the shell is fixed to the telescopic end of the second telescopic rod, a cutter is rotatably connected in the shell, a motor is fixed on the shell, the output shaft of the motor is concentric with and fixedly connected to the cutter, supporting plates are fixed on both sides of the shell, a sliding rod is elastically slidably arranged on the supporting plate, the axial direction of the sliding rod is parallel to the axial direction of the second telescopic rod, a top wheel is rotatably connected to the upper end of the sliding rod, and the axis of the top wheel is parallel to the axis of the cutter.

[0009] Specifically, the rolling assembly includes brackets fixed at two ends of the base, and rollers are rotatably connected to both ends of the brackets.

[0010] Specifically, the lower end of the second telescopic rod is rotatably connected to the ear seat fixed to the upper end of the base, an ear plate is fixed on the cylinder body of the second telescopic rod, the telescopic end of the first telescopic rod is rotatably connected to the ear plate, and a support plate is rotatably connected to the cylinder body of the first telescopic rod, and the support plate is fixed to the upper end of the base.

[0011] Specifically, a retaining ring is fixed on the slide bar above the support plate, a spring is sleeved on the slide bar between the retaining ring and the support plate, the upper end of the spring is fixedly connected to the retaining ring, and the lower end of the spring is fixedly connected to the support plate.

[0012] Specifically, the cross section of the sliding rod is rectangular.

[0013] Specifically, openings are provided on both sides of the lower end of the shell.

[0014] Specifically, hooks are fixed at both ends of the base.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. When the cutter of the cutting device is cutting the liner pipe, the top wheels on both sides of the cutter can be tightly pressed against the liner pipe, and the cutting device has good stability during the cutting of the liner pipe.

[0017] 2. The inclination angle of the second telescopic rod can be changed by the first telescopic rod, so that the cutting device can be easily inserted into a small-diameter liner pipe. When not in use, the second telescopic rod is tilted, so the cutting device occupies little space and is easy to store.

[0018] 3. The second telescopic rod can increase the height of the cutter and can cut large-diameter liner pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the cutting device.

[0020] Figure 2 A three-dimensional view of the cutting device.

[0021] Figure 3 It is a side view of the cutting device.

[0022] Figure 4 This is a schematic diagram of the cutting device cutting the liner pipe.

[0023] The names of the parts in the attached drawings are:

[0024] 1 Base

[0025] 2 Bracket

[0026] 3 Scroll Wheel

[0027] 4 Hook

[0028] 5 boards

[0029] 6. First telescopic rod

[0030] 7 Ear Plate

[0031] 8 Ear seat

[0032] 9 Second telescopic rod

[0033] 10. Housing

[0034] 11 Cutter

[0035] 12 Motor

[0036] 13 Pallet

[0037] 14 Sliders

[0038] 15 retaining ring

[0039] 16. Crown Chakra

[0040] 17 Spring

[0041] 18 Opening

[0042] 19 Original pipeline

[0043] 20 Liner pipe. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0045] Example 1: Reference Figure 1-Figure 4 As shown, a device for longitudinally cutting the inner wall of a pipe comprises a base 1 , and hooks 4 are fixed at both ends of the base 1 .

[0046] A rolling assembly is provided on the base 1. The rolling assembly includes brackets 2 fixed at both ends of the base 1, and both ends of the bracket 2 are rotatably connected with rollers 3. By providing the rolling assembly, the cutting assembly is convenient to move in the inner liner pipe 20.

[0047] The rope is passed through the inner liner tube 20 using a rope threading trolley, and then the rope passing through the inner liner tube 20 is connected to one of the hooks 4, and the other hook 4 is connected to another rope. The cutting assembly can be moved in the inner liner tube 20 by pulling the two ropes.

[0048] The upper end of the base 1 is rotatably connected with a second telescopic rod 9. Specifically, the lower end of the second telescopic rod 9 is rotatably connected with an ear seat 8 fixed to the upper end of the base 1.

[0049] The second telescopic rod 9 is connected to the base 1 through the first telescopic rod 6. Specifically, an ear plate 7 is fixed to the cylinder of the second telescopic rod 9, the telescopic end of the first telescopic rod 6 is rotatably connected to the ear plate 7, and a support plate 5 is rotatably connected to the cylinder of the first telescopic rod 6, and the support plate 5 is fixed to the upper end of the base 1.

[0050] The inclination angle of the second telescopic rod 9 can be adjusted by starting the first telescopic rod 6 .

[0051] A cutting assembly is fixed to the telescopic end of the second telescopic rod 9. The cutting assembly includes a housing 10, which is fixed to the telescopic end of the second telescopic rod 9, a cutter 11 is rotatably connected in the housing 10, and a motor 12 is fixed to the housing 10, and the output shaft of the motor 12 is concentric with the cutter 11 and is fixedly connected.

[0052] A support plate 13 is fixed on both sides of the housing 10, and a slide bar 14 is elastically slidably arranged on the support plate 13. Specifically, a retaining ring 15 is fixed on the slide bar 14 above the support plate 13, and a spring 17 is sleeved on the slide bar 14 between the retaining ring 15 and the support plate 13, the upper end of the spring 17 is fixedly connected to the retaining ring 15, and the lower end of the spring 17 is fixedly connected to the support plate 13. The axial direction of the slide bar 14 is parallel to the axial direction of the second telescopic rod 9. The cross section of the slide bar 14 is rectangular. A top wheel 16 is rotatably connected to the upper end of the slide bar 14, and the axis of the top wheel 16 is parallel to the axis of the cutter 11.

[0053] When cutting the inner liner 20, the second telescopic rod 9 and the cutting assembly are tilted in advance by starting the first telescopic rod 6. The second telescopic rod 9 and the cutting assembly are tilted to facilitate the cutting device to enter the inner liner 20 with a small diameter.

[0054] Reference Figure 4 As shown, when cutting a small-caliber inner liner 20, the motor 12 is started, the motor 12 drives the cutter 11 to rotate, the first telescopic rod 6 is started to change the inclination angle of the second telescopic rod 9, and the cutter 11 is close to the inner liner 20. In the process of the cutter 11 approaching the inner liner 20, the top wheel 16 is in contact with the inner wall of the inner liner 20 in advance. As the cutter 11 continues to approach the inner liner 20, the inner liner 20 squeezes the top wheel 16, the slide bar 14 slides relative to the support plate 13, and the spring 17 is squeezed. The inclination angle of the second telescopic rod 9 is controlled so that the cutter 11 can cut the inner liner 20 without cutting the original pipe 19. The cutting device moves in the inner liner 20 along the axial direction of the inner liner 20, and then the cutter 11 is used to cut the inner liner 20. In the process of cutting the inner liner 20, the top wheels 16 on both sides of the cutter 11 can be close to the inner liner 20, which can ensure the stability of the cutting device when cutting and moving the inner liner 20.

[0055] The camera can be inserted into the inner liner tube 20, and the cutting condition of the inner liner tube 20 can be observed in real time based on the image information displayed on a display electrically connected to the camera.

[0056] After the inner liner pipe 20 is cut, the inner liner pipe 20 can be rolled up and pulled out from the original pipeline 19 .

[0057] When it is necessary to cut the inner liner pipe 20 with a large diameter, the second telescopic rod 9 is kept in a vertical state, and then the second telescopic rod 9 is started to change the height of the cutter 11. This enables the cutting device to cut the inner liner pipe 20 with a large diameter.

[0058] Embodiment 2: Based on Embodiment 1, refer to Figure 3 As shown, openings 18 are formed on both sides of the lower end of the housing 10 .

[0059] During the process of cutting the inner liner tube 20 , the cutting chips that enter the outer shell 10 can be discharged through the opening 18 , so as to avoid a large amount of cutting chips remaining in the outer shell 10 and hindering the rotation of the cutter 11 .

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for longitudinally cutting the inner wall of a pipe, comprising a base (1), on which a rolling assembly is arranged, characterized in that: The upper end of the base (1) is rotatably connected to a second telescopic rod (9), the telescopic end of the second telescopic rod (9) is fixed with a cutting assembly, and the second telescopic rod (9) is connected to the base (1) via a first telescopic rod (6); the cutting assembly comprises a housing (10), the housing (10) is fixed to the telescopic end of the second telescopic rod (9), a cutter (11) is rotatably connected inside the housing (10), a motor (12) is fixed to the housing (10), an output shaft of the motor (12) is concentric with and fixedly connected to the cutter (11), a support plate (13) is fixed on both sides of the housing (10), a slide bar (14) is elastically slidably arranged on the support plate (13), the axial direction of the slide bar (14) is parallel to the axial direction of the second telescopic rod (9), a top wheel (16) is rotatably connected to the upper end of the slide bar (14), and the axis of the top wheel (16) is parallel to the axis of the cutter (11).

2. A device for longitudinally cutting inner wall of a pipe according to claim 1, characterized in that: The rolling assembly comprises brackets (2) fixed at both ends of a base (1), and rollers (3) are rotatably connected to both ends of the brackets (2).

3. A device for longitudinally cutting inner wall of a pipe according to claim 1, characterized in that: The lower end of the second telescopic rod (9) is rotatably connected to an ear seat (8) fixed to the upper end of the base (1); an ear plate (7) is fixed to the cylinder body of the second telescopic rod (9); the telescopic end of the first telescopic rod (6) is rotatably connected to the ear plate (7); a support plate (5) is rotatably connected to the cylinder body of the first telescopic rod (6); and the support plate (5) is fixed to the upper end of the base (1).

4. A device for longitudinally cutting inner wall of a pipe according to claim 1, characterized in that: A retaining ring (15) is fixed on the slide bar (14) above the support plate (13), and a spring (17) is sleeved on the slide bar (14) between the retaining ring (15) and the support plate (13), wherein the upper end of the spring (17) is fixedly connected to the retaining ring (15), and the lower end of the spring (17) is fixedly connected to the support plate (13).

5. The device for longitudinally cutting the inner wall of a pipe according to claim 1, characterized in that: The cross section of the sliding rod (14) is rectangular.

6. A device for longitudinally cutting inner wall of a pipe according to claim 1, characterized in that: Openings (18) are provided on both sides of the lower end of the shell (10).

7. A device for longitudinally cutting inner wall of a pipe according to claim 1, characterized in that: Hooks (4) are fixed at both ends of the base (1).

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