Special dragging cable for pipeline robot

Abstract

The invention relates to the technical field of cables, in particular to a special dragging cable for a pipeline robot, which comprises a cable main body provided with a protective layer and a reinforcing layer, one end of which is electrically connected with a connecting point of a robot body to realize power and signal transmission, and a mounting ring provided with a connecting layer and fixed on the cable main body through the connecting layer, the butt joint unit is installed in a bearing hole formed in the robot body, the direction where the cable body is located is set to be the first direction, and when the cable body applies axial dragging force in the first direction and the cable body is electrically connected with the robot body through the connecting point, the connecting unit on the installation ring is in butt joint with the butt joint unit on the robot body, and the cable body is connected with the robot body. When the cable is dragged, force acts on the butt joint part and does not act on the connecting part of the cable and the robot, and the core problems that due to the fact that a connecting point bears dragging force, a welding spot falls off, and a terminal is loosened are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a special cable for pipeline robots. BACKGROUND

[0002] Pipeline robots are widely used in the detection and maintenance of closed or complex environments such as oil and gas pipelines and municipal drainage networks. During operation, they need to be powered and transmit signals through special cables, and need to withstand mechanical actions such as dragging and pulling. Therefore, the tensile strength, wear resistance and connection reliability of the cable are strictly required. Special dragging cables are one of the core supporting components for the stable operation of pipeline robots, and directly affect the operation efficiency and equipment safety.

[0003] The existing dragging cable of the pipeline robot and the robot body mostly use traditional electrical connection structures (such as welded joints and plug-in terminals). The connection point simultaneously bears the functions of power transmission and dragging mechanical bearing. Due to the complex working conditions inside the pipeline, such as pipe wall friction, turning on bends, and obstacle blocking, the axial tension, radial shear force and torsional force generated during dragging operation will directly act on the electrical connection part of the cable and the robot, causing problems such as weld drop-off, terminal loosening, and insulation layer damage. After long-term repeated dragging, the mechanical fatigue accumulation of the connection point will further aggravate the risk of structural failure, eventually causing the cable and the robot to disconnect, resulting in power failure and signal interruption of the robot, which not only leads to the termination of the operation, but also causes the robot to be stranded inside the pipeline, increasing the cost of equipment recovery and maintenance, and seriously affecting the continuity and safety of pipeline detection and maintenance work. SUMMARY

[0004] The purpose of the present application is to provide a special cable for pipeline robots to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] A special cable for pipeline robots, comprising a cable body with a protective layer and a reinforcing layer, one end of which is electrically connected to the connection point of the robot body to realize power and signal transmission;

[0007] A mounting ring with a connecting layer, the mounting ring is fixed to the cable body through the connecting layer;

[0008] A docking unit installed in the bearing hole of the robot body, the direction of the cable body is set as the first direction, and the direction of the robot body is set as the second direction. When the cable body applies axial drag force along the first direction, the docking unit transmits the drag force. The docking unit comprises a docking pipe, a transmission block and a connecting fastener. When the drag force acts, the transmission block drives the connecting fastener to press tightly against the inner wall of the bearing hole.

[0009] A connecting unit is installed on the mounting ring. The docking unit and the mounting ring are docked through the connecting unit. The connecting unit includes a connecting sleeve and a connecting ball. When the cable body is connected to the connection point, the connecting ball enters the docking tube to realize the transmission of drag force.

[0010] Preferably, the docking unit further includes a locking unit, which is installed along the inner wall of the docking tube, and both ends of the locking unit protrude from the inner and outer walls of the docking tube, respectively. When the connecting ball enters the inner cavity of the docking unit and passes through the locking unit, the docking unit and the connecting unit are docked. The connecting unit also includes an unlocking ring. When the docking unit and the connecting unit are docked, the connecting sleeve is sleeved on the outer side of the docking tube, and the locking unit contacts the unlocking ring.

[0011] Preferably, an unlocking unit is fixed to the outer side of the unlocking ring, and an unlocking groove is provided on the inner side. A locking ring is provided on the outer side of the connecting sleeve. The unlocking unit includes a throttle, a button, a first rack, a second rack, a gear, and a locking plate. The locking plate is disposed in the inner cavity of the locking ring. The first rack is fixedly connected to the button. The gear meshes with both the first and second racks. A spring is installed at the bottom of the first rack. The locking plate is fixedly connected to the second rack. By pressing the button, the locking plate is disengaged from the inner cavity of the locking ring, allowing the unlocking ring to rotate.

[0012] Preferably, a braking hole is provided on the outer side of the connecting ball, and a braking unit is provided on the inner wall of the docking tube. The braking unit includes a braking cylinder and a braking block. A spring is provided in the inner cavity of the braking cylinder, and the braking block is connected to the spring. When the braking block enters the braking hole, the docking unit and the connecting unit are docked.

[0013] Preferably, the inner cavity of the mounting ring is provided with a mounting layer, the mounting layer is set as an upward inclined surface from the middle section to both sides, the connecting layer is disposed in the mounting layer, the inner wall of the connecting layer is provided with barbs, the cable body includes a protective layer and a reinforcing layer, the reinforcing layer is disposed inside the protective layer, and the cable core is disposed inside the reinforcing layer, the barbs penetrate the protective layer and connect with the reinforcing layer.

[0014] Preferably, the locking unit includes a locking seat and a locking block. The locking seat is disposed on the outside of the connecting pipe, and the locking block is disposed on the inside of the connecting pipe. A spring is disposed in the inner cavity of the locking block, and one side of the locking block is configured as an inclined surface.

[0015] Preferably, a movable groove is provided on the outer side of one end of the connecting pipe, and a transmission block is provided in the inner cavity of the movable groove. A stabilizing groove is also provided on the outer side of the connecting pipe, and the connecting fastener is fixed in the inner cavity of the stabilizing groove.

[0016] Preferably, the inner wall of the movable groove is further provided with a reinforcing strip, and the connecting fastener includes a fixing seat and a clamping plate. One end of the reinforcing strip is located in the inner cavity of the fixing seat, and a clamping plate is provided on each side of the fixing seat.

[0017] Preferably, the bearing hole includes an installation hole, a fixing groove, and a load-bearing groove, the connecting pipe is disposed in the installation hole, one of the clamping plates is disposed in the load-bearing groove, and the transmission block is disposed in the fixing groove.

[0018] Preferably, the inner wall of the fixing groove is inclined in the first direction, so that the inner diameter of the fixing groove gradually decreases in the first direction, one side of the transmission block is set as an inclined surface, one side of the reinforcing strip is set as an inclined surface, and the corresponding surfaces of the two clamping plates are set as inclined surfaces.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, when the cable body is electrically connected to the robot body through the connection point, the connection unit on the mounting ring docks with the docking unit on the robot body. When the cable is dragged, the force is applied to the docking part, not to the connection part between the cable and the robot, thus solving the core problem of the connection point falling off and the terminal loosening due to the dragging force.

[0021] 2. In addition, by setting barbs on the mounting ring, the barbs penetrate the cable protective layer and connect with the reinforcing layer, so that the cable is pressed tightly against the reinforcing layer by the tension when it is dragged, preventing the mounting ring from falling off the cable when it is dragged. At the same time, when the cable is dragged, the barbs go deeper into the reinforcing layer, further preventing the mounting ring from falling off due to the dragging force, and preventing the dragging force from acting directly on the connection between the cable and the robot.

[0022] 3. Based on the above structure, when the cable is dragged, the dragging force will also act on the connection between the docking unit and the robot. The docking unit installed in the bearing hole, while bearing the dragging force, becomes more stable with the increase of the dragging force, thus preventing the docking unit from falling off the robot body when the cable is dragged. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the drag cable portion of a pipeline robot according to this application, and the robot body is also shown.

[0024] Figure 2 For this application Figure 1 Enlarged view of the structure of area A in the middle;

[0025] Figure 3 This is a schematic diagram of the overall structure of the connecting unit in this application;

[0026] Figure 4For the present invention Figure 3 Enlarged view of the structure in area B;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the unlocking unit in this application;

[0028] Figure 6 This is a schematic diagram of the overall structure of the docking unit in this application;

[0029] Figure 7 This is an exploded view of the overall structure of the locking unit in this application;

[0030] Figure 8 This is a sectional view of the overall structure of the braking unit in this application;

[0031] Figure 9 This is a partial structural disassembly diagram of the docking unit in this application;

[0032] Figure 10 This is an exploded view of the overall structure of the connecting firmware in this application;

[0033] Figure 11 This is a cross-sectional plan view of the bearing hole in this application;

[0034] Figure 12 This is a cross-sectional plan view of the cable body and mounting ring in this application;

[0035] Figure 13 This is a three-dimensional cross-sectional view of the mounting ring in this application.

[0036] In the picture:

[0037] 100. Cable body; 110. Protective layer; 120. Reinforcing layer; 200. Mounting ring; 210. Connecting layer; 211. Barb; 220. Mounting layer;

[0038] 300. Robot body; 310. Connection point; 320. Bearing hole; 321. Mounting hole; 322. Fixing groove; 323. Load-bearing groove;

[0039] 400. Docking unit; 410. Docking pipe; 411. Movable groove; 412. Stabilizing groove; 413. Reinforcing strip; 420. Locking unit; 421. Locking seat; 422. Locking block; 430. Braking unit; 431. Brake cylinder; 432. Brake block; 440. Transmission block; 450. Connecting fastener; 451. Fixed seat; 452. Clamping plate;

[0040] 500. Connecting unit; 510. Connecting sleeve; 511. Locking ring; 520. Connecting ball; 521. Brake hole; 530. Unlocking ring; 531. Unlocking groove; 540. Unlocking unit; 541. Throttle; 542. Button; 543. First rack; 544. Second rack; 545. Gear; 546. Locking plate. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0043] like Figures 1-2 As shown, this embodiment discloses a special cable for dragging a pipeline robot, including a cable body 100, a mounting ring 200, a docking unit 400, and a connecting unit 500. The mounting ring 200 is installed at one end of the cable body 100, the docking unit 400 is installed on one side of the robot body 300, and the connecting unit 500 is installed on one side of the mounting ring 200.

[0044] Furthermore, in the existing technology, the drag cable for pipeline robots often uses traditional electrical connection structures such as welded joints and pluggable terminals. This connection point simultaneously bears the dual functions of power transmission and drag force. When the robot is moved by dragging the cable, the drag force is directly applied to the connection point between the robot and the cable. After long-term dragging, the connection point between the robot and the cable is prone to breakage, resulting in power loss and signal interruption for the robot. This not only leads to the termination of the operation but also causes the robot to become stuck inside the pipeline, affecting the continuity of pipeline robot maintenance work.

[0045] like Figures 1-2As shown, a bearing hole 320 is provided on one side of the robot body 300, and the docking unit 400 is fixedly installed in the inner cavity of the bearing hole 320. A connection point 310 is provided on the same side of the robot body 300. The cable body 100 and the robot body 300 are electrically connected through the connection point 310. When the cable body 100 is connected to the connection point 310, the docking unit 400 and the connection unit 500 are docked at the same time. The direction of the cable body 100 is set as the first direction, and the direction of the robot body 300 is set as the second direction. When the cable is dragged in the first direction, the dragging force is applied to the connection between the docking unit 400 and the connection unit 500, so that the cable body 100 and the connection point 310 always maintain a stable electrical connection.

[0046] like Figure 3 , Figure 6 As shown, the connecting unit 500 includes a connecting sleeve 510, a connecting ball 520, an unlocking ring 530, and an unlocking unit 540. The connecting ball 520 is fixedly installed in the inner cavity of the connecting sleeve 510. The unlocking ring 530 is located in the middle section of the connecting sleeve 510. One end of the unlocking unit 540 is connected to the outer side of the unlocking ring 530, and the other end contacts the outer side of the connecting sleeve 510. The docking unit 400 includes a docking tube 410 and a locking unit 420. Multiple locking units 420 are provided in the inner cavity of the docking tube 410. When the docking unit 400 docks with the connecting unit 500, the connecting ball 520 first... The connecting sleeve 510 enters the inner cavity of the connecting tube 410 and continues to move in the second direction with the connecting unit 500. The connecting sleeve 510 is fitted onto the outside of the connecting tube 410, and the locking unit 420 is fixed in position by the unlocking ring 530. After the connecting ball 520 completely passes through the locking unit 420, the connecting ball 520 is fixed in the inner cavity of the connecting tube 410. The docking unit 400 and the connecting unit 500 are docked. The locking unit 420 is positioned behind the connection point 310, so that when the cable body 100 is dragged, the dragging force does not act on the connection between the connection point 310 and the cable body 100.

[0047] like Figure 3 As shown, the locking unit 420 includes a locking seat 421 and a locking block 422. The locking seat 421 is disposed on the outer wall of the connecting tube 410, and the locking block 422 is disposed on the inner wall of the connecting tube 410. The locking block 422 is set as an inclined surface facing the first direction. When the connecting ball 520 enters the inner cavity of the connecting tube 410, the connecting ball 520 presses the locking block 422 through the inclined surface, causing it to move towards the locking seat 421, so that the connecting ball 520 successfully passes through the locking unit 420. After the connecting ball 520 passes through, the locking block 422 is no longer compressed. Under the action of the spring, the locking block 422 rebounds to its original position, thereby preventing the connecting ball 520 from detaching from the inner cavity of the connecting tube 410, so that the connecting unit 500 and the docking unit 400 can complete the docking.

[0048] like Figure 7 As shown, the inner side of the unlocking ring 530 is provided with an unlocking groove 531, and the inner cavity of the unlocking groove 531 is adapted to one side of the locking seat 421. When the connecting sleeve 510 is sleeved on the outer side of the connecting tube 410, the unlocking ring 530 blocks the locking seat 421, keeping the position of the locking block 422 fixed. The locking block 422 blocks the connecting ball 520 to prevent it from coming out of the inner cavity of the connecting tube 410. When it is necessary to disconnect the cable body 100 from the robot body 300, By rotating the unlocking ring 530, the unlocking groove 531 is aligned with the locking seat 421. The spring in the inner cavity of the locking block 422 drives the locking seat 421 into the unlocking groove 531. The locking block 422 retracts, allowing it to move towards the locking seat 421. The connecting ball 520 is unobstructed and can disengage from the inner cavity of the docking tube 410, thus disconnecting the docking unit 400 and the connecting unit 500. The cable body 100 can then be removed from the connection point 310.

[0049] like Figures 4-5 As shown, a locking ring 511 is provided at the connection point between the outer side of the connecting sleeve 510 and one end of the unlocking unit 540. The unlocking unit 540 includes a throttle 541, a button 542, a first rack 543, a second rack 544, a gear 545, and a locking plate 546. The button 542 is located on the top of the throttle 541. The first rack 543 is fixed to the bottom of the button 542, and the gear 545 meshes with one side of the first rack 543. The gear 545 also meshes with the second rack 544. The locking plate 546 is fixedly connected to the bottom of the second rack 544. The locking plate 546 contacts the locking ring 511, thereby fixing the unlocking ring 530 so that it cannot rotate. By pressing the button 542, the first rack 543 moves downward and drives the gear 545 to rotate. The rotation of the gear 545 drives the second rack 544 to move upward, so that the locking plate 546 moves upward and no longer contacts the locking ring 511. At this time, the unlocking ring 530 can be rotated to adjust the position of the locking block 422, thereby completing the fixing between the docking unit 400 and the connecting unit 500, or disconnecting the docking unit 400 and the connecting unit 500.

[0050] like Figure 3 , Figure 8As shown, the inner cavity of the connecting tube 410 is provided with a braking unit 430. The braking unit 430 includes a braking cylinder 431 and a braking block 432. The inner cavity of the braking cylinder 431 is provided with a spring, and the spring is connected to the braking block 432. Braking holes 521 are opened on both sides of the connecting ball 520. When the connecting ball 520 passes through the locking unit 420, the braking block 432 enters the inner cavity of the braking hole 521 under the elastic force of the spring, further fixing the connecting ball 520 to prevent it from detaching from the connecting tube 410. At the same time, when the docking unit 400 and the connecting unit 500 are docked, the braking block 432 is embedded in the braking hole 521, restricting the rotation of the connecting ball 520, preventing the locking seat 421 from accidentally entering the unlocking groove 531, preventing accidental disconnection of the docking unit 400 and the connecting unit 500. The docking unit 400 and the connecting unit 500 will be disconnected and can only be operated by rotating the unlocking ring 530. This prevents the connecting unit 500 from rotating during the process of dragging the cable body 100, which would cause the docking unit 400 and the connecting unit 500 to disconnect.

[0051] like Figures 12-13 As shown, the cable body 100 includes a protective layer 110 and a reinforcing layer 120. The reinforcing layer 120 is disposed inside the protective layer 110, and the cable core is disposed inside the reinforcing layer 120. The mounting ring 200 includes a connecting layer 210. The inner side of the connecting layer 210 is provided with a barb 211. The barb 211 penetrates the protective layer 110 and directly hooks the reinforcing layer 120, so that the cable body 100 is pressed tightly against the reinforcing layer 120 when dragged, preventing the mounting ring 200 from axially moving and detaching from the outside of the cable body 100, so that the dragging force always acts on the connection end between the docking unit 400 and the connecting unit 500.

[0052] like Figure 13 As shown, the mounting ring 200 also includes a mounting layer 220, and the inner cavity of the mounting layer 220 is inclined from the middle to both sides. When the connecting layer 210 moves axially along the inner cavity of the mounting layer 220, the barb 211 goes deeper into the interior of the reinforcing layer 120, so that the stronger the drag force, the more stable the connection between the cable body 100 and the mounting ring 200.

[0053] like Figures 9-11As shown, a movable groove 411 is provided on the outer side of one end of the connecting pipe 410. A transmission block 440 is provided in the inner cavity of the movable groove 411. A stabilizing groove 412 is also provided on the outer side of the connecting pipe 410. A connecting fastener 450 is provided in the inner cavity of the stabilizing groove 412. A reinforcing strip 413 is provided on the inner wall of the movable groove 411. One side of the reinforcing strip 413 is set as an inclined surface. When the transmission block 440 moves deeper into the inner cavity of the movable groove 411, it moves towards the stabilizing groove 412. The connecting fastener 450 includes a fixing seat 451 and a clamping plate. 452, one end of the reinforcing strip 413 is located in the inner cavity of the fixing seat 451. A clamping plate 452 is provided on both sides of the fixing seat 451. The bearing hole 320 includes a mounting hole 321, a fixing groove 322, and a bearing groove 323. The connecting pipe 410 is provided in the mounting hole 321, a clamping plate 452 is provided in the bearing groove 323, and the transmission block 440 is provided in the fixing groove 322, so that the docking unit 400 is fixed in the inner cavity of the bearing hole 320 to bear the dragging force generated when the dragging cable body 100 is dragged.

[0054] like Figures 9-11 As shown, the inner wall of the fixing groove 322 is inclined in the first direction, so that the inner diameter of the fixing groove 322 gradually decreases in the first direction. The contact surface between the transmission block 440 and the locking block 422 is set as an inclined surface. When the docking unit 400 is subjected to dragging force and moves in the first direction, the transmission block 440 moves into the depth of the inner cavity of the movable groove 411. One side of the reinforcing strip 413 is set as an inclined surface, so that the reinforcing strip 413 moves in the direction of the stabilizing groove 412. The corresponding surfaces of the two clamping plates 452 are set as inclined surfaces. When the reinforcing strip 413 moves towards the stabilizing groove 412... When moving in a direction, the two clamping plates 452 are pushed to make them move in opposite directions, so that one clamping plate 452 is deeper into the inner cavity of the bearing groove 323, while the fixing seat 451 is fixed in the stabilizing groove 412. When the docking unit 400 is subjected to the drag of the cable body 100, the connection between the docking unit 400 and the bearing hole 320 is more stable, preventing the docking unit 400 from falling out of the inner cavity of the bearing hole 320 after the cable body 100 is continuously dragged, so that the dragging force is directly applied to the connection between the cable body 100 and the connection point 310.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. The present invention is not limited to the above embodiments; the embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A dedicated drag cable for pipeline robots, characterized in that: include The cable body (100) has a protective layer (110) and a reinforcing layer (120), one end of which is electrically connected to the connection point (310) of the robot body (300) to realize power and signal transmission; Mounting ring (200) having a connecting layer (210) is fixed to the cable body (100) via the connecting layer (210); A docking unit (400) is installed in a bearing hole (320) on the robot body (300). The direction of the cable body (100) is set as a first direction, and the direction of the robot body (300) is set as a second direction. When the cable body (100) is subjected to an axial drag force along the first direction, the docking unit (400) transmits the drag force. The docking unit (400) includes a docking pipe (410), a transmission block (440), and a connecting fastener (450). When the drag force is applied, the transmission block (440) drives the connecting fastener (450) to press against the inner wall of the bearing hole (320). A connecting unit (500) is installed on the mounting ring (200). The docking unit (400) and the mounting ring (200) are docked through the connecting unit (500). The connecting unit (500) includes a connecting sleeve (510) and a connecting ball (520). When the cable body (100) is connected to the connection point (310), the connecting ball (520) enters the docking tube (410) to realize the transmission of drag force.

2. The drag cable for a pipeline robot according to claim 1, characterized in that: The docking unit (400) further includes a locking unit (420), which is installed along the inner wall of the docking tube (410), and the two ends of the locking unit (420) protrude from the inner and outer walls of the docking tube (410), respectively. When the connecting ball (520) enters the inner cavity of the docking unit (400) and passes through the locking unit (420), the docking unit (400) and the connecting unit (500) are docked. The connecting unit (500) further includes an unlocking ring (530). When the docking unit (400) and the connecting unit (500) are docked, the connecting sleeve (510) is sleeved on the outside of the docking tube (410), and the locking unit (420) contacts the unlocking ring (530).

3. The drag cable for a pipeline robot according to claim 2, characterized in that: The unlocking ring (530) has an unlocking unit (540) fixed on its outer side and an unlocking groove (531) on its inner side. The connecting sleeve (510) has a locking ring (511) on its outer side. The unlocking unit (540) includes a throttle (541), a button (542), a first rack (543), a second rack (544), a gear (545), and a locking plate (546). The locking plate (546) is located in the inner cavity of the locking ring (511). The first rack (543) is fixedly connected to the button (542). The gear (545) meshes with both the first rack (543) and the second rack (544). A spring is installed at the bottom of the first rack (543). The locking plate (546) is fixedly connected to the second rack (544). By pressing the button (542), the locking plate (546) is disengaged from the inner cavity of the locking ring (511), allowing the unlocking ring (530) to rotate.

4. A special cable for dragging a pipeline robot according to claim 2, characterized in that: The outer side of the connecting ball (520) is provided with a braking hole (521), and the inner wall of the docking tube (410) is provided with a braking unit (430). The braking unit (430) includes a braking cylinder (431) and a braking block (432). The inner cavity of the braking cylinder (431) is provided with a spring, and the braking block (432) is connected through the spring. When the braking block (432) enters the braking hole (521), the docking unit (400) and the connecting unit (500) are docked.

5. A dedicated drag cable for a pipeline robot according to claim 1, characterized in that: The mounting ring (200) has an inner cavity with a mounting layer (220). The mounting layer (220) is set as an upward inclined surface from the middle section to both sides. The connecting layer (210) is set in the mounting layer (220). The inner wall of the connecting layer (210) is provided with a barb (211). The cable body (100) includes a protective layer (110) and a reinforcing layer (120). The reinforcing layer (120) is set inside the protective layer (110), and the cable core is set inside the reinforcing layer (120). The barb (211) penetrates the protective layer (110) and connects with the reinforcing layer (120).

6. A dedicated drag cable for a pipeline robot according to claim 2, characterized in that: The locking unit (420) includes a locking seat (421) and a locking block (422). The locking seat (421) is located on the outside of the connecting tube (410), and the locking block (422) is located on the inside of the connecting tube (410). A spring is provided in the inner cavity of the locking block (422), and one side of the locking block (422) is set as an inclined surface.

7. A dedicated drag cable for a pipeline robot according to claim 1, characterized in that: A movable groove (411) is provided on the outer side of one end of the connecting pipe (410), and a transmission block (440) is provided in the inner cavity of the movable groove (411). A stabilizing groove (412) is also provided on the outer side of the connecting pipe (410), and the connecting fastener (450) is fixed in the inner cavity of the stabilizing groove (412).

8. A dedicated drag cable for a pipeline robot according to claim 7, characterized in that: The inner wall of the movable groove (411) is also provided with a reinforcing strip (413). The connecting fastener (450) includes a fixed seat (451) and a clamping plate (452). One end of the reinforcing strip (413) is located in the inner cavity of the fixed seat (451). A clamping plate (452) is provided on each side of the fixed seat (451).

9. A dedicated drag cable for a pipeline robot according to claim 8, characterized in that: The bearing hole (320) includes a mounting hole (321), a fixing groove (322), and a load-bearing groove (323). The connecting pipe (410) is disposed in the mounting hole (321), a clamping plate (452) is disposed in the load-bearing groove (323), and the transmission block (440) is disposed in the fixing groove (322).

10. A dedicated drag cable for a pipeline robot according to claim 9, characterized in that: The inner wall of the fixing groove (322) is inclined in the first direction, so that the inner diameter of the fixing groove (322) gradually decreases in the first direction. One side of the transmission block (440) is set as an inclined surface, one side of the reinforcing strip (413) is set as an inclined surface, and the corresponding surfaces of the two clamping plates (452) are set as inclined surfaces.

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