A trenchless pipe rehabilitation apparatus

Abstract

The utility model provides a kind of trenchless pipeline repair device, including two opposite traction seat, two traction seat are connected with cylinder-shaped air bag, and the inside of air bag is equipped with solidification mechanism;The solidification mechanism includes oppositely arranged first rotating seat and second rotating seat, and heating unit is equipped between the two rotating seats, and screw rod is rotatably arranged between the two rotating seats, and is drivingly connected with heating unit, and can drive heating unit to expand / contract;Second rotating seat is rotatably connected with one of traction seat, and driving unit is arranged between first rotating seat and another traction seat;Driving unit is arranged to drive screw rod and first rotating seat relatively / synchronously rotate.The utility model can adapt to pipeline maintenance work of different pipe diameters by setting expandable / contractible heating unit;By setting driving unit to adjust screw rod and first rotating seat relatively / synchronously rotate, the rotation of heating unit is realized, the heating efficiency is improved, and the uniformity of heating of repair material is guaranteed.

Description

[0001] Cross-reference to related applications This application claims priority to a utility model patent filed on December 24, 2024, with application number 202423184926.9, entitled "A Trenchless Pipeline Repair Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of pipeline repair technology, specifically a trenchless pipeline repair device. Background Technology

[0003] Trenchless point repair of pipelines refers to a method of localized repair where, at the location of the pipeline to be repaired, a specialized point repair airbag expansion method is used to apply repair material tightly to the repair site. After curing, a localized short pipe lining is formed, creating a ring-shaped local repair. Patent application CN201921208272.5 discloses a trenchless pipeline repair device, comprising two sets of positioning seats and a cylindrical airbag body. The two sets of positioning seats and the airbag body form an airbag cavity, inside which an ultraviolet lamp is installed. A plastic wrap is placed around the center of the outer periphery of the airbag body, and repair material is wrapped outside the plastic wrap. This pipeline repair device can repair larger localized pipeline damage, reducing construction time and minimizing disruption to traffic. However, the ultraviolet lamp inside this pipe repair device is located in the center of the airbag and its position is fixed. When the diameter of the pipe to be repaired is large, the ultraviolet lamp is far from the inner wall of the pipeline, which not only affects the curing effect of the inner wall but also leads to a longer curing time, reducing construction efficiency. Utility Model Content

[0004] To address the technical problems in the aforementioned background technology, where the UV lamp position is fixed and the distance between a single lamp tube and the inner wall of the pipe leads to a longer curing time, this utility model provides a trenchless pipe repair device.

[0005] The technical solution of this utility model is as follows: A trenchless pipeline repair device includes two opposing traction seats, with a cylindrical airbag connected between the two traction seats, and a curing mechanism inside the airbag; the curing mechanism includes a first rotating seat and a second rotating seat opposite to each other, and a heating unit disposed between the two rotating seats; a threaded rod rotatably connected to the heating unit and capable of driving the heating unit to unfold / retract is also disposed between the two rotating seats; the second rotating seat is rotatably connected to one of the traction seats, and a driving unit is disposed between the first rotating seat and the other traction seat; the driving unit is configured to drive the threaded rod and the first rotating seat to rotate relative to each other / synchronously.

[0006] After wrapping the repair material around the airbag, the repair device (the aforementioned trenchless pipe repair device) is inserted into the pipe. The airbag is then inflated until the repair material adheres to the inner wall of the pipe. At this point, the control drive unit is activated, and the heating unit expands to a position suitable for the inner diameter of the pipe. The heating unit then begins to rotate, allowing the repair material to be heated evenly until it solidifies. At this point, the heating unit stops rotating and retracts. After a certain cooling time, the airbag is deflated, and the repair device is pulled back.

[0007] Specifically, the drive unit includes a lateral drive component fixed to the traction seat, and a motor that is drively connected to the lateral drive component and can move axially along the threaded rod. The drive shaft of the motor passes through the first rotating seat and is inserted into the threaded rod, and the cross-section of the drive shaft is non-circular. The drive shaft is also provided with a slot, and the first rotating seat is provided with a pin that can engage with the slot. The lateral drive component drives the drive shaft to insert into the threaded rod, with the pin and slot misaligned. When the motor is started, the drive shaft drives the threaded rod to rotate independently. When the lateral drive component is started again, the drive shaft retracts until the pin engages with the slot, at which point the drive shaft can drive the threaded rod and the first rotating seat to rotate synchronously.

[0008] Furthermore, the first rotary seat has a circular through hole in the middle, and the pin is elastically disposed within the through hole. The elasticity of the pin ensures that it will not affect the lateral movement of the drive shaft.

[0009] To ensure that the pin can slide smoothly out of the slot during the movement of the drive shaft, the side of the pin that is opposite to the threaded rod is set as an inclined surface, and the depth of the slot is less than the vertical height of the inclined surface of the pin.

[0010] In a preferred embodiment, the motor body has a clamping component on the side near the first rotary seat. The distance between the clamping component facing the first rotary seat and the slot is L1, and the distance between the slot and the side of the first rotary seat facing the clamping component is L2, where L1 > L2. A rubber pad is also provided on the side of the clamping component opposite to the first rotary seat. When the drive shaft is fully inserted into the threaded rod and the pin is misaligned with the slot, the clamping component abuts against the first rotary seat, preventing accidental rotation of the first rotary seat due to friction between the drive shaft and the pin during rotation.

[0011] Specifically, the heating unit includes two oppositely arranged nuts, each helically connected to a threaded rod. An extension frame is hinged between the two nuts, and a UV lamp is mounted on the side of the extension frame opposite to the threaded rod, parallel to the threaded rod. When the threaded rod rotates, the two nuts move in opposite directions, sequentially extending / retracting the extension frame hinged to them, thereby adjusting the distance between the UV lamp and the inner wall of the pipe.

[0012] To ensure that the nuts do not rotate synchronously with the threaded rod when it rotates alone, a sliding rod parallel to the threaded rod is provided between the two rotating seats, and the two nuts are slidably connected to the sliding rod.

[0013] More preferably, at least two extension frames are provided along the circumference of the threaded rod to increase the heating intensity of the ultraviolet lamp and improve the heating efficiency.

[0014] Preferably, the two traction seats include a columnar body seat with a plurality of wheels on its outer ring to facilitate the smooth movement of the airbag in the pipe and to avoid friction between the airbag and the inner wall of the pipe during movement.

[0015] Through the above design, the beneficial effects of this trenchless pipeline repair device are as follows: After the repair material is wrapped around the outer ring of the airbag, it is sent into the pipeline through the traction seat. Then, the airbag is inflated. When the airbag inflates until the repair material adheres to the inner wall of the pipeline, the control drive unit is activated, and the heating unit unfolds to a position suitable for the inner diameter of the pipeline. Then, the heating unit starts to rotate, so that the repair material can be heated evenly until the repair material solidifies. At this time, the heating unit stops rotating and retracts. After a certain cooling time, the airbag is deflated, and the repair device is pulled back. This invention, by setting an unfoldable / retractable heating unit and adjusting the distance between the ultraviolet lamp and the inner wall of the pipeline, can adapt to pipeline repair work of different diameters. By setting a drive unit to adjust the relative / synchronous rotation of the threaded rod and the first rotating seat, the heating unit can be rotated for heating, improving heating efficiency and ensuring the uniform heating of the repair material. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a cross-sectional view of a trenchless pipeline repair device according to the present invention; Figure 2 This is a schematic diagram of the structure of a trenchless pipeline repair device according to the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the heating unit in the embodiment; Figure 5 This is a cross-sectional view of the heating unit in the embodiment; The components represented by the various reference numerals in the diagram are: 1. Airbag; 2. Traction seat; 21. Main body seat; 22. Traveling wheel; 3. Reinforcing mechanism; 31. First rotating seat; 32. Second rotating seat; 33. Threaded rod; 34. Heating unit; 341. Nut; 342. Extension frame; 343. Ultraviolet lamp; 344. Sliding rod; 35. Pin; 4. Drive unit; 41. Lateral movement drive component; 42. Drive shaft; 43. Clamping component. Detailed Implementation

[0017] Example Combination Figure 1 , Figure 2 This embodiment provides a trenchless pipeline repair device, including two oppositely arranged traction seats 2, with a cylindrical airbag 1 connected between the two traction seats 2, and a curing mechanism inside the airbag 1.

[0018] Preferably, the two traction seats 2 include a columnar body seat 21, with a plurality of traveling wheels 22 on its outer ring, which facilitates the smooth movement of the airbag 1 in the pipeline, while avoiding friction between the airbag 1 and the inner wall of the pipeline during movement.

[0019] A trenchless pipeline repair device also includes an inflation tube with one end passing through one of the traction seats 2 and extending into the airbag 1, the other end of which is connected to an inflation device. After the repair material is wrapped around the outer ring of the airbag 1, the repair device is sent into the pipeline, and then the airbag 1 is inflated until the repair material adheres to the inner wall of the pipeline. Then, the curing mechanism is activated to improve the curing effect of the repair material.

[0020] In this embodiment, the curing mechanism includes a first rotating seat 31 and a second rotating seat 32 arranged opposite to each other, and a heating unit 34 disposed between the two rotating seats. A threaded rod 33 is also rotatably disposed between the two rotating seats, which is connected to the heating unit 34 and can drive the heating unit 34 to unfold / retract.

[0021] Reference Figure 4 , Figure 5 Specifically, the heating unit 34 includes two oppositely arranged nuts 341, both helically connected to the threaded rod 33. An extension frame 342 is hinged between the two nuts 341. An ultraviolet lamp 343, parallel to the threaded rod 33, is located on the side of the extension frame 342 facing away from it. When the threaded rod 33 rotates, the two nuts 341 move in opposite directions, sequentially causing the extension frame 342 to unfold / retract, thus adjusting the distance between the ultraviolet lamp 343 and the inner wall of the pipe.

[0022] To ensure that the nut 341 does not rotate synchronously with the threaded rod 33 when the threaded rod 33 rotates alone, a sliding rod 344 parallel to the threaded rod 33 is provided between the two rotating seats, and the two nuts 341 are slidably connected to the sliding rod 344.

[0023] More preferably, at least two extension frames 342 are provided along the circumference of the threaded rod 33 to increase the heating intensity of the ultraviolet lamp tube 343 and improve the heating efficiency.

[0024] In one embodiment, the extension frame 342 has a scissor-fork structure, with one side hinged to two nuts 341 and the other side connected to a strip-shaped arc plate. The center of the arc plate coincides with the center of the threaded rod 33. The side of the arc plate facing the threaded rod 33 has a connecting plate along its radius that can connect to the extension frame 342. The ultraviolet lamp 343 is located on the side of the arc plate away from the connecting plate. Connecting the ultraviolet lamp 343 to the extension frame 342 via the arc plate improves the stability of the ultraviolet lamp 343 and facilitates maintenance and replacement.

[0025] Specifically, the extension frame 342 includes two connecting rods hinged together in the middle. One end of each connecting rod is hinged to two nuts 341, and the other end is connected to a connecting plate. The connecting plate has a strip-shaped groove or slot along its length in the middle. The end of one connecting rod is directly hinged to one end of the connecting plate, and the end of the other connecting rod is located in the groove or slot and can slide along the groove or slot so that the extension frame 342 can smoothly unfold / retract when the two nuts 341 move in opposite directions.

[0026] It is worth noting that, as one embodiment, the ultraviolet lamp 343 adopts a sliding contact power supply method. The outer ring of the second rotating base 32 is provided with a sliding contact coil connected to an external power source. The ultraviolet lamp 343 is connected to the sliding contact coil through a current collector element to ensure that the ultraviolet lamp 343 can draw power at any time during rotation.

[0027] In this embodiment, the second rotating seat 32 is rotatably connected to one of the traction seats 2, and a driving unit 4 is provided between the first rotating seat 31 and the other traction seat 2; the driving unit 4 is configured to drive the threaded rod 33 and the first rotating seat 31 to rotate relative to each other / synchronously.

[0028] Reference Figure 2 , Figure 3 Specifically, the drive unit 4 includes a lateral drive component 41 fixed to the traction seat 2, and a motor that is tractively connected to the lateral drive component 41 and can move axially along the threaded rod 33. The drive shaft 42 of the motor passes through the first rotating seat 31 and is inserted into the threaded rod 33, and the cross-section of the drive shaft 42 is non-circular. The drive shaft 42 is also provided with a slot, and the first rotating seat 31 is provided with a pin 35 that can engage with the slot. The lateral drive component 41 drives the drive shaft 42 to insert into the threaded rod 33, and the pin 35 is misaligned with the slot. When the motor is started, the drive shaft 42 drives the threaded rod 33 to rotate independently. When the lateral drive component 41 is started again, the drive shaft 42 is driven to retract until the pin 35 engages with the slot. At this time, the drive shaft 42 can drive the threaded rod 33 and the first rotating seat 31 to rotate synchronously.

[0029] In one embodiment, the cross-section of the drive shaft 42 is set as a regular quadrilateral, and slots are provided on both opposite side walls to improve the accuracy of the pin 35 being inserted into the slots.

[0030] Furthermore, the first rotary seat 31 has a circular through hole in the middle, and the pin 35 is elastically disposed in the through hole. The inner diameter of the through hole is larger than the outer diameter of the drive shaft 42, ensuring that the first rotary seat 31 will not accidentally rotate when the threaded rod 33 rotates alone. Blind holes are formed along the radial direction on the inner wall of the through hole. One end of the pin 35 is spring-loaded into the blind hole, and the other end can engage with a slot. The elastic design of the pin 35 ensures that it will not affect the lateral movement of the drive shaft 42.

[0031] To ensure that the pin 35 can slide smoothly out of the slot during the movement of the drive shaft 42, the side of the pin 35 that is opposite to the threaded rod 33 is set as an inclined surface, and the depth of the slot is less than the vertical height of the inclined surface of the pin 35.

[0032] Combination Figure 3 In a preferred embodiment, the motor body has a clamping member 43 on the side near the first rotating base 31. The distance between the clamping member 43 facing the first rotating base 31 and the slot is L1, and the distance between the slot and the side of the first rotating base 31 facing the clamping member 43 is L2, where L1 > L2. A rubber pad is also provided on the side of the clamping member opposite to the first rotating base 31. When the drive shaft 42 is fully inserted into the threaded rod 33 and the pin 35 is misaligned with the slot, the clamping member abuts against the first rotating base 31, preventing accidental rotation of the first rotating base 31 due to friction between the drive shaft 42 and the pin 35 when the drive shaft 42 rotates.

[0033] In one embodiment, the drive unit 4 further includes a horizontally arranged columnar outer cylinder. One end of the outer cylinder is fixedly connected to the traction seat 2, and the other end is rotatably connected to the first rotating seat 31. The transverse driving component 41 is fixedly installed inside the outer cylinder, and the motor slides in cooperation with the inner wall of the outer cylinder, thereby improving the overall integrity of the drive unit 4 and further improving the stability of the first rotating seat 31.

[0034] The working principle of this utility model is as follows: After the repair material is wrapped around the outer ring of the airbag 1, it is sent into the pipeline through the traction seat 2. Then, the airbag 1 is inflated. When the airbag 1 inflates until the repair material adheres to the inner wall of the pipeline, the drive unit 4 is activated, controlling the transmission shaft 42 to be fully inserted into the threaded rod 33. At this time, the threaded rod 33 rotates independently. As the threaded rod 33 rotates, the two nuts 341 move towards each other, and the extension frame 342 gradually unfolds until it reaches a position suitable for the inner diameter of the pipeline. The lateral drive component 41 is activated at any time to drive the pipeline. The drive shaft 42 retracts until it reaches the position of the latch 35 in the slot. Continuing to rotate the drive shaft 42 causes the latch 35 to engage with the slot. At this point, the first rotating seat 31 rotates synchronously with the threaded shaft. The extension frame 342 no longer extends but rotates synchronously with the threaded rod 33 and the first rotating seat 31. During rotation, the repair material is heated evenly until it solidifies. After the solidification time is reached, the heating unit 34 stops rotating and retracts. After a certain cooling time, the airbag 1 is deflated, and the repair device is pulled back. This invention, by setting an extendable / retractable heating unit 34 and adjusting the distance between the ultraviolet lamp 343 and the inner wall of the pipe, can adapt to pipe repair work of different diameters. By setting a drive unit 4 to adjust the relative / synchronous rotation of the threaded rod 33 and the first rotating seat 31, the heating unit 34 is rotated for heating, improving heating efficiency and ensuring the uniform heating of the repair material.

Claims

1. A trenchless pipeline repair device, characterized in that, It includes two opposing traction seats (2), a cylindrical airbag (1) is connected between the two traction seats (2), and a solidification mechanism (3) is provided inside the airbag (1); The curing mechanism (3) includes a first rotating seat (31) and a second rotating seat (32) arranged opposite to each other, and a heating unit (34) disposed between the two rotating seats. A threaded rod (33) is also rotatably connected to the heating unit (34) and capable of driving the heating unit (34) to unfold / retract. The second rotating seat (32) is rotatably connected to one of the traction seats (2), and a drive unit (4) is provided between the first rotating seat (31) and the other traction seat (2). The drive unit (4) is configured to drive the threaded rod (33) and the first rotary seat (31) to rotate relative to each other / synchronously.

2. The trenchless pipeline repair device according to claim 1, characterized in that, The drive unit (4) includes a transverse drive component (41) fixed to the traction seat (2), and a motor that is connected to the transverse drive component (41) and can move axially along the threaded rod (33). The drive shaft (42) of the motor passes through the first rotating seat (31) and is inserted into the threaded rod (33). The cross section of the drive shaft (42) is non-circular. The drive shaft (42) is also provided with a slot, and the first rotary seat (31) is provided with a pin (35) that can engage with the slot.

3. The trenchless pipeline repair device according to claim 2, characterized in that, The first rotating base (31) has a circular through hole in the middle, and the pin (35) is elastically disposed in the through hole.

4. The trenchless pipeline repair device according to claim 3, characterized in that, The snap-fit ​​end of the pin (35) is set as an inclined surface on the side away from the threaded rod (33), and the depth of the slot is less than the vertical height of the inclined surface of the pin.

5. The trenchless pipeline repair device according to claim 2, characterized in that, The motor body has a clamping component (43) on the side near the first rotary seat (31). The distance between the side of the clamping member (43) facing the first rotating seat (31) and the slot is L1, and the distance between the slot and the side of the first rotating seat (31) facing the clamping member (43) is L2, where L1 > L2.

6. A trenchless pipeline repair device according to any one of claims 1-5, characterized in that, The heating unit (34) includes two nuts (341) arranged opposite to each other and both spirally connected to the threaded rod (33). A stretching frame (342) is hinged between the two nuts (341). The stretching frame (342) is provided with an ultraviolet lamp (343) arranged parallel to the threaded rod (33) on the side away from the threaded rod (33).

7. The trenchless pipeline repair device according to claim 6, characterized in that, A sliding rod (344) is also provided between the two rotary seats, parallel to the threaded rod (33). The two nuts (341) are slidably connected to the sliding rod (344).

8. A trenchless pipeline repair device according to claim 6, characterized in that, At least two extension frames (342) are provided along the circumference of the threaded rod (33).

9. A trenchless pipeline repair device according to any one of claims 1-5, characterized in that, The two traction seats (2) include a columnar body seat (21) with a number of wheels (22) on its outer ring.

Images