CN216971625U - Pipeline detection sonar device for protecting cables - Google Patents

Abstract

The application discloses pipeline detection sonar device of protection cable relates to the technical field of pipeline detection sonar equipment, has strengthened the protection to the cable when pipeline detection sonar device withdraws the cable, and it is including the mounting bracket that is used for supplying sonar, cable and cable drum installation, the both ends of cable are connected with sonar and cable drum respectively, still including the automobile body that is used for carrying the mounting bracket removal, the mounting bracket sets up in the top of automobile body, the bottom of automobile body has the wheel, cable drum sets up in the one end of mounting bracket, the one end of keeping away from cable drum on the mounting bracket is provided with and is used for carrying out abluent wiper mechanism to withdrawing the cable surface, the one end that is close to the cable drum on the mounting bracket is provided with and is used for the even winding mechanism on the cable drum of cable. The cable surface cleaning device can clean the surface of a cable when the cable is retracted, and meanwhile, the cable can be wound on a cable coil neatly and uniformly.

Description

Pipeline detection sonar device for protecting cables

Technical Field

The application relates to the technical field of pipeline detection sonar equipment, in particular to a pipeline detection sonar device for protecting cables.

Background

At present, in order to dredge and repair underground drainage pipelines, the internal conditions of the drainage pipelines need to be known, when water exists in the drainage pipelines, particularly when the underground drainage pipelines are blocked, and the water level in the drainage pipelines and in the overhaul well is higher, the functional defect detection of the drainage pipelines can be generally completed by using sonar equipment, so that the positions of the blockage of the drainage pipelines can be found.

A cleaning device for pipeline inspection sonar imaging device, of which publication number is CN212264022U, includes the mounting bracket that is used for installing the cable drum, the mounting bracket is provided with the basin, the mounting bracket is provided with the tensioning component that is used for guiding the cable to pass from the basin top, the mounting bracket is provided with the subassembly of pressing that is used for impressing the cable into the basin, the mounting bracket is provided with the clean subassembly that is used for the clean cable that passes through the basin.

The device cleans the cable in the process of withdrawing the cable, and has the advantage of reducing the complexity of cable cleaning. The cable cleaning device can reduce the attachment of impurities on the surface of the cable after the cable is cleaned, and has a protection effect on the cable, but the cleaning of the cable is far from enough because the cable passes through the water in the water tank, so that the cable also has a lifting space for protecting the cable in the process of withdrawing the cable drum.

SUMMERY OF THE UTILITY MODEL

In order to strengthen the protection to the cable when pipeline detection sonar device withdraws the cable, this application provides a pipeline detection sonar device of protection cable.

The application provides a pipeline inspection sonar device of protection cable, adopts following technical scheme:

the utility model provides a pipeline inspection sonar device of protection cable, is including the mounting bracket that is used for supplying sonar, cable and cable drum installation, the both ends of cable are connected with sonar and cable drum respectively, still including the automobile body that is used for carrying the mounting bracket removal, the mounting bracket sets up in the top of automobile body, the bottom of automobile body has the wheel, the cable drum sets up in the one end of mounting bracket, the one end of keeping away from the cable drum on the mounting bracket is provided with and is used for carrying out abluent wiper mechanism to retrieving the cable surface, the one end that is close to the cable drum on the mounting bracket is provided with and is used for the even kinking mechanism on the cable drum of cable.

Through adopting above-mentioned technical scheme, the in-process that the cable was withdrawed back can be earlier handled the sewage and the impurity on cable surface, reduces sewage and impurity and remains and corrode the probability on cable surface on the cable surface, later can also be with the even winding of cable on the cable drum, effectively avoids the cable winding to be mixed and disorderly and makes the cable part receive the distortion extrusion and lead to the fact the damage to the cable, can prolong the life of cable, reduces the probability of cable electric leakage, effectively protects the cable.

Optionally, the wiper mechanism includes the washing subassembly that is used for washing the cable surface, the washing subassembly is located wiper mechanism's one end near the sonar, the washing subassembly includes:

the first support rod is horizontally arranged, and a first through hole for a cable to pass through is formed in the first support rod;

the water washing pipe is arranged in the first through hole;

the water pump is arranged on the vehicle body;

wherein, the one end that the washing pipe is close to first through-going hole has the washing nozzle, the washing pipe is kept away from the one end in first through-going hole and is connected with the water pump.

Through adopting above-mentioned technical scheme, the surface that the cable was washed to the water can wash most impurity and sewage to make the surface of cable cleaner.

Optionally, wiper mechanism still includes the air wash subassembly that is used for carrying out the air wash to the cable surface, the air wash subassembly is located the one side that the sonar was kept away from to the water wash subassembly, the air wash subassembly includes:

the second support rod is parallel to the first support rod, and a second through hole for the cable to pass through is formed in the second support rod;

the gas washing pipe is arranged in the second through hole;

the air pump is arranged on the vehicle body;

and one end of the air washing pipe, which is close to the second through hole, is provided with an air washing nozzle, and one end of the air washing pipe, which is far away from the second through hole, is connected with an air pump.

Through adopting above-mentioned technical scheme, sweep the cable surface with gas and can blow off the remaining moisture and a small amount of impurity on cable surface after the washing, make the surface of cable cleaner.

Optionally, the cleaning mechanism further comprises a scrubbing assembly for wiping off water and impurities on the surface of the cable, the scrubbing assembly is positioned on the side of the air scrubbing assembly away from the sonar, and the scrubbing assembly comprises:

the third supporting rod is parallel to the second supporting rod, and a third through hole for the cable to pass through is formed in the third supporting rod;

the scrubbing piece is arranged in the third through hole;

the scrubbing piece is made of elastic materials, a scrubbing hole for the cable to penetrate through penetrates through the scrubbing piece, and the aperture of the scrubbing hole is not larger than the radial size of the cable.

By adopting the technical scheme, the surface of the cable is cleaned again after the cable is washed by water and air, so that the surface of the cable which is retracted and wound on the cable coil can be kept clean and dry.

Optionally, first bracing piece, second bracing piece and third bracing piece are located same vertical plane, the axis in first wearing hole, second wearing hole and third wearing hole is same vertical line, set up the hole of stepping down that supplies cable and sonar to regain the pass on the automobile body, during the use automobile body cover and pipeline open-ended top.

By adopting the technical scheme, the moving direction of the cable is consistent with the direction of the pipeline in the process of cable laying down and cable withdrawing, the use of the cable is convenient, meanwhile, the collision between the cable and the inner wall of the pipeline in the use process of sonar can be reduced, the scratch between the cable and the pipeline wall or other objects in the use process of the cable can be effectively avoided, and the surface of the cable is protected.

Optionally, the vehicle body is provided with the apron that is used for controlling the hole switching of stepping down in the hole position of stepping down.

Through adopting above-mentioned technical scheme, thereby can prevent effectively that the cable from withdrawing the back mistake extension and make the sonar fall out from the hole of stepping down and bump with ground and lead to sonar trouble and damage even.

Optionally, the winding mechanism comprises a tension roller for guiding the cable withdrawing direction and a winding assembly for assisting the cable to withdraw and wind, the tension roller is arranged on one side of the cleaning mechanism far away from the sonar, and the winding assembly is arranged between the tension roller and the cable disc.

Through adopting above-mentioned technical scheme, the tensioning roller can make the cable of withdrawing the winding on the cable drum tight, makes the cable twine neatly inseparabler on the cable drum.

Optionally, the winding assembly comprises:

the fourth supporting rod is arranged perpendicular to the retracting direction of the cable;

the sliding piece is connected with the fourth supporting rod in a sliding mode along the length direction of the fourth supporting rod;

the first driving piece is arranged on the mounting frame;

and the sliding part slides back and forth on the fourth supporting rod when the cable coil rotates to withdraw the cable.

Through adopting above-mentioned technical scheme, can make the cable evenly wind on the cable drum, pile up layer upon layer on the cable drum after finally making the cable winding, make the cable winding more neat.

In summary, the present application includes at least one of the following advantages:

1. when the cable is retracted, the surface of the cable can be deeply cleaned, so that the surface of the cable is kept clean and dry, and the probability of corrosion on the surface of the cable is reduced;

2. the cable can be evenly neatly twined on the cable drum, makes the cable pile up layer upon layer on the cable drum, makes things convenient for the winding of cable, also can effectively avoid the mixed and disorderly condition of cable winding simultaneously.

Drawings

FIG. 1 is a schematic structural diagram of a pipe detection sonar device according to an embodiment of the present application;

FIG. 2 is a sectional view of a pipe inspection sonar device according to an embodiment of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

fig. 5 is an enlarged view at C in fig. 2.

Description of reference numerals: 1. a pipeline; 2. sonar; 3. a cable; 4. a mounting frame; 5. a vehicle body; 51. a hole of abdication; 52. a wheel; 53. a handle; 54. a sliding groove; 55. a cover plate; 56. a third driving member; 6. a cleaning mechanism; 61. a water washing component; 611. a water pump; 612. washing the tube with water; 6121. washing the nozzle with water; 613. a first support bar; 6131. a first through hole; 6132. a first mounting groove; 62. a gas washing assembly; 621. an air pump; 622. a gas washing pipe; 623. a second support bar; 6231. a second through hole; 6232. a second mounting groove; 63. a scrubbing assembly; 631. a third support bar; 6311. a third through hole; 632. a scrubbing member; 6321. scrubbing holes; 7. a winding mechanism; 71. a tension roller; 72. a wire winding assembly; 721. a fourth support bar; 722. a slider; 7221. a fourth through hole; 723. a first driving member; 724. an elastic member; 7241. positioning holes; 8. a cable drum; 9. a console; 91. a button.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses pipeline detection sonar device of protection cable.

Referring to fig. 1 and 2, protection cable 3's pipeline detection sonar device is including the sonar 2 that is used for pipeline 1 to detect, be used for the cable 3 for sonar 2 power supply, be used for supplying cable 3 winding cable drum 8, be used for supplying mounting bracket 4 of cable drum 8 installation and be used for driving automobile body 5 that mounting bracket 4 removed, mounting bracket 4 sets up on automobile body 5, cable drum 8 sets up on mounting bracket 4, the one end and the sonar 2 of cable 3 are connected, the other end and the cable drum 8 of cable 3 are connected. When the pipeline detection sonar device is not used, the cable 3 is retracted and wound on the cable drum 8, and the sonar 2 is also positioned on the vehicle body 5. When the pipeline detection sonar device is used, the cable 3 is pulled out, and the sonar 2 goes deep into the pipeline 1 to be detected.

The mounting frame 4 is arranged above the vehicle body 5, wheels 52 are arranged at the bottom of the vehicle body 5, and one end of the vehicle body 5 is provided with a handle 53 which is convenient for a worker to control the movement of the vehicle body 5. Offer along vertical direction on the automobile body 5 and supply sonar 2 to put down the hole of stepping down 51 of going deep into pipeline 1 inside, sonar 2's appearance is the cylinder structure, and the aperture of the hole of stepping down 51 is greater than sonar 2's radial dimension. Automobile body 5 is provided with the apron 55 that is used for controlling hole 51 switching of stepping down in hole 51 department, preferred apron 55 and automobile body 5 sliding connection in this embodiment, automobile body 5 is inside to be offered and to supply apron 55 to follow the gliding sliding tray 54 of horizontal direction, sliding tray 54 communicates with each other with hole 51 of stepping down, automobile body 5 is inside still to be provided with and to be used for driving the gliding third driving piece 56 of apron 55, apron 55 is located sliding tray 54 and keeps away from when the one end of the groove of stepping down, hole 51 of stepping down is opened completely, when apron 55 will step down hole 51 and cover, sonar 2 withdraws back sonar 2 and places on apron 55.

Referring to fig. 1 and 2, the mounting frame 4 is a cubic frame structure, and the mounting frame 4 is provided with a cleaning mechanism 6 for cleaning the surface of the cable 3 and a winding mechanism 7 for assisting the cable 3 to be wound on a cable drum 8 regularly and uniformly. The cleaning mechanism 6 is arranged above the yielding hole 51, and the cleaning mechanism 6 sequentially comprises a water washing component 61 for washing the surface of the cable 3, an air washing component 62 for air washing the surface of the cable 3 and a scrubbing component 63 for scrubbing the surface of the cable 3 along the vertical direction from bottom to top.

Referring to fig. 1, 2 and 3, the washing assembly 61 includes a first support rod 613, a washing pipe 612 and a water pump 611. The first support 613 is disposed horizontally, and the first support 613 is perpendicular to the retracting direction of the cable 3. A first through hole 6131 for the cable 3 to pass through penetrates through the first supporting rod 613 along the vertical direction, and a first installation groove 6132 for installing the water washing pipe 612 is formed on the hole wall of the first through hole 6131 of the first supporting rod 613. The water washing pipe 612 surrounds the first installation groove 6132 to form a loop, and one end of the water washing pipe 612 close to the cable 3 is provided with a plurality of water washing nozzles 6121, and the water washing nozzles 6121 face the position of the cable 3 and are arranged obliquely downwards. The water pump 611 is disposed at an end of the vehicle body 5 away from the handle 53, and an end of the washing pipe 612 away from the first support 613 penetrates the first support 613 and is connected to the water pump 611. When the cable 3 retracts to pass through the first through hole 6131, the water pump 611 delivers water into the water washing pipe 612 to spray water on the surface of the cable 3 through the plurality of water washing nozzles 6121 for cleaning, the sprayed water flows downwards along the surface of the cable 3 to pass through the abdicating hole 51 and finally falls into the pipeline 1, and the water residue on the vehicle body 5 is reduced.

Referring to fig. 1, 2 and 4, the air wash assembly 62 includes a second support bar 623, an air wash pipe 622, and an air pump 621. The second supporting rod 623 is parallel to the first supporting rod 613, the second supporting rod 623 is located above the first supporting rod 613, a second through hole 6231 for the cable 3 to pass through is vertically penetrated through the second supporting rod 623, and a second mounting groove 6232 for mounting the washing pipe 622 is formed on the hole wall of the second through hole 6231 of the second supporting rod 623. The air purge pipe 622 surrounds the second mounting groove 6232 to form a loop, and a plurality of air purge nozzles are disposed at one end of the air purge pipe 622 near the cable 3, and the air purge nozzles face the cable 3 and are disposed obliquely downward. The air pump 621 is disposed at an end of the vehicle body 5 away from the handle 53, the air pump 621 is disposed at one side of the water pump 611, and an end of the air purge tube 622 away from the second support bar 623 penetrates through the second support bar 623 and is connected to the air pump 621. When the cable 3 passes through the second through hole 6231 after being retracted, the air pump 621 sends air into the air washing pipe 622 to blow the air to the surface of the cable 3 through the plurality of air washing nozzles, so that the residual moisture and impurities on the surface of the cable 3 are blown down, the blown-down moisture and impurities finally fall into the pipeline 1, and the residues of the impurities and the moisture on the vehicle body 5 are reduced.

Referring to fig. 1 and 2, the scrubbing assembly 63 includes a third support bar 631 and a scrubbing member 632. The third support rod 631 is disposed in parallel with the first support rod 613, the third support rod 631 is disposed above the second support rod 623, and a third through hole 6311 for the cable 3 to pass through is vertically disposed on the third support rod 631. The axes of the first through hole 6131, the second through hole 6231 and the third through hole 6311 are located on the same vertical line, and the diameters of the first through hole 6131, the second through hole 6231 and the third through hole 6311 are the same and are all larger than the radial dimension of the cable 3. The scrubbing element 632 is disposed in the third through hole 6311, and the scrubbing element 632 is connected to the hole wall of the third through hole 6311. The scrubbing piece 632 is a circular cylinder structure, a scrubbing hole 6321 for scrubbing the surface of the cable 3 penetrates through the scrubbing piece 632, the hole wall of the scrubbing hole 6321 abuts against the surface of the cable 3, the scrubbing piece 632 is made of a material with certain elasticity, the hole diameter of the scrubbing hole 6321 is not larger than the radial dimension of the cable 3, and the scrubbing piece 632 wipes off residual impurities and water on the surface of the cable 3 when the cable 3 passes through the scrubbing hole 6321.

Referring to fig. 1 and 2, the winding mechanism 7 includes a tension roller 71 for tensioning the cable 3 and tensioning the cable 3, the tension roller 71 being mounted on the mounting bracket 4, the tension roller 71 being positioned above the third support rod 631, the tension roller 71 being rotatably coupled to the mounting bracket 4, the rotation axis of the tension roller 71 being parallel to the third support rod 631. The cable 3 is in contact with the roller surface of the tension roller 71, and the retracting direction of the cable 3 is changed after the cable 3 is tensioned by the tension roller 71.

In order to enhance the tightening effect of the tension roller 71 on the cable 3, two tension rollers 71 are provided in the present embodiment, two tension rollers 71 are respectively located at two ends of the mounting frame 4, and the two tension rollers 71 are located on the same horizontal plane.

Referring to fig. 1, 2 and 3, the spooling mechanism 7 further comprises a spooling assembly 72 for assisting in spooling the cable 3 on the cable drum 8, the cable 3 assembly is positioned between two takeup rollers 71, the spooling assembly 72 comprises a fourth support bar 721 and a slider 722, the fourth support bar 721 is parallel to the first support bar 613, the slider 722 is slidably connected to the fourth support bar 721, and the slider 722 is capable of sliding along the length of the fourth support bar 721. A fourth through hole 7221 for the cable 3 to pass through is formed in the slider 722, the aperture of the fourth through hole 7221 is the same as that of the first through hole 6131, an elastic member 724 is arranged in the fourth through hole 7221 of the slider 722, a positioning hole 7241 matched with the cable 3 passes through the elastic member 724, and the cable 3 passes through the positioning hole 7241 and then is connected with the cable coil 8. The winding assembly 72 further includes a first driving member 723 for driving the sliding member 722 to slide on the fourth supporting rod 721, the first driving member 723 is disposed on the fourth supporting rod 721, and the first driving member 723 drives the sliding member 722 to slide on the fourth supporting rod 721 in a reciprocating manner. In this embodiment, the sliding connection between the sliding member 722 and the fourth supporting rod 721 is preferably a screw sliding manner, and in other embodiments, other sliding manners may be adopted.

Referring to fig. 1 and 5, a second driving member for controlling the rotation of the cable drum 8 to control the retraction or extension of the cable 3 is disposed on one side of the cable drum 8 on the mounting frame 4, the sliding member 722 slides back and forth while the cable drum 8 rotates, so that the cable 3 is uniformly wound on the cable drum 8 and stacked layer by layer, and when the sliding member 722 slides to the limit position of the two ends of the fourth supporting rod 721, the cable 3 is wound on the two ends of the cable drum 8.

Referring to fig. 1 and 2, a console 9 is disposed at one end of the vehicle body 5 close to the handle 53, and a plurality of buttons 91 for controlling the first driving member 723, the second driving member, the third driving member 56, the water pump 611, the air pump 621 and other devices are disposed on the console 9, so that the pipeline detection sonar device can be conveniently controlled by a worker.

The implementation principle of the pipeline detection sonar device of this application embodiment of a protection cable is:

firstly, a vehicle body 5 is moved to the upper part of a pipeline 1, then a third driving part 56 is controlled to drive a cover plate 55 to open a relief hole 51, then a second driving part is controlled to drive a cable drum 8 to rotate to extend a cable 3 to enable the sonar 2 to go deep into the pipeline 1 for detection, after detection is finished, the second driving part is controlled to drive the cable drum 8 to rotate to enable the cable 3 to be retracted so as to enable the sonar 2 to be retracted, in the process of retracting the cable 3, a first driving part 723, an air pump 621 and a water pump 611 are all started, the surface of the cable 3 is clean after water washing, air washing and scrubbing are carried out when the cable 3 is retracted, then the cable 3 is tightened through a tensioning roller 71 and the retracting direction is changed, then the cable 3 is uniformly wound and stacked on the cable drum 8 along the axial direction under the sliding of a sliding part 722, and finally the sonar 2 is retracted to the vehicle body 5 from the interior of the pipeline 1, and then a control console 9 is operated to enable the cable drum 8, a cable drum 5 is retracted, The air pump 621, the water pump 611 and other equipment are closed, the third driving member 56 is controlled to drive the cover plate 55 to close the abdicating hole 51, and the sonar 2 is placed on the cover plate 55 to complete the recovery of the sonar 2 and the recovery winding of the cable 3.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A pipeline detection sonar device for protecting cables comprises an installation frame (4) for installing a sonar (2), a cable (3) and a cable coil (8), two ends of the cable (3) are respectively connected with the sonar (2) and the cable coil (8), it is characterized by also comprising a vehicle body (5) which is used for carrying the mounting rack (4) to move, the mounting rack (4) is arranged above the vehicle body (5), wheels (52) are arranged at the bottom of the vehicle body (5), the cable coil (8) is arranged at one end of the mounting rack (4), a cleaning mechanism (6) for cleaning the surface of the withdrawn cable (3) is arranged at one end of the mounting rack (4) far away from the cable coil (8), and a winding mechanism (7) for uniformly winding the cable (3) on the cable coil (8) is arranged at one end of the mounting rack (4) close to the cable coil (8).

2. The cable-protecting pipe detection sonar device according to claim 1, wherein the cleaning mechanism (6) includes a water washing component (61) for washing the surface of the cable (3), the water washing component (61) is located at one end of the cleaning mechanism (6) close to the sonar (2), and the water washing component (61) includes:

the first support rod (613), the said first support rod (613) sets up horizontally, offer the first through hole (6131) for the cable (3) to pass on the said first support rod (613);

the water washing pipe (612) is arranged in the first through hole (6131);

a water pump (611), the water pump (611) being provided on the vehicle body (5);

one end of the washing pipe (612) close to the first through hole (6131) is provided with a washing nozzle (6121), and one end of the washing pipe (612) far away from the first through hole (6131) is connected with the water pump (611).

3. The cable-protecting pipeline inspection sonar apparatus according to claim 2, wherein the cleaning mechanism (6) further comprises an air-washing component (62) for air-washing the surface of the cable (3), the air-washing component (62) is located on a side of the water-washing component (61) away from the sonar (2), and the air-washing component (62) comprises:

the second supporting rod (623) is parallel to the first supporting rod (613), and a second through hole (6231) for the cable (3) to pass through is formed in the second supporting rod (623);

an air-washing tube (622), the air-washing tube (622) being disposed in the second through hole (6231);

the air pump (621), the said air pump (621) is set up on the car body (5);

and one end of the air washing pipe (622) close to the second through hole (6231) is provided with an air washing nozzle, and one end of the air washing pipe (622) far away from the second through hole (6231) is connected with the air pump (621).

4. A cable-protecting pipe inspection sonar apparatus according to claim 3, wherein the cleaning mechanism (6) further comprises a scrubbing assembly (63) for scrubbing water and impurities from the surface of the cable (3), the scrubbing assembly (63) is located on the side of the gas washing assembly (62) away from the sonar (2), and the scrubbing assembly (63) comprises:

the third support rod (631) is parallel to the second support rod (623), and a third through hole (6311) for the cable (3) to pass through is formed in the third support rod (631);

the scrubbing piece (632) is arranged in the third through hole (6311);

the scrubbing piece (632) is made of elastic materials, a scrubbing hole (6321) for the cable (3) to penetrate through penetrates through the scrubbing piece (632), and the aperture of the scrubbing hole (6321) is not larger than the radial dimension of the cable (3).

5. The cable-protecting pipeline detection sonar device according to claim 4, wherein the first support rod (613), the second support rod (623) and the third support rod (631) are located in the same vertical plane, the axes of the first through hole (6131), the second through hole (6231) and the third through hole (6311) are the same vertical line, a abdicating hole (51) for the cable (3) and the sonar (2) to retract and pass is formed in the vehicle body (5), and the vehicle body (5) covers the upper side of the opening of the pipeline (1) when in use.

6. The cable-protecting duct detection sonar device according to claim 5, wherein a cover plate (55) for controlling opening and closing of the evacuation hole (51) is provided at the evacuation hole (51) of the vehicle body (5).

7. The pipeline detection sonar device for protecting the cable according to claim 1, wherein the winding mechanism (7) comprises a tension roller (71) for guiding the retracting direction of the cable (3) and a winding assembly (72) for assisting the cable (3) to retract and wind, the tension roller (71) is arranged on one side of the cleaning mechanism (6) far away from the sonar (2), and the winding assembly (72) is arranged between the tension roller (71) and the cable disc (8).

8. A cable protecting pipe detecting sonar apparatus according to claim 7, wherein the wire wrapping assembly (72) includes:

a fourth support rod (721), wherein the fourth support rod (721) is arranged perpendicular to the retracting direction of the cable (3);

the sliding piece (722) is connected with the fourth supporting rod (721) in a sliding mode along the length direction of the fourth supporting rod (721);

the first driving piece (723), the first driving piece (723) is arranged on the mounting rack (4);

the sliding piece (722) is provided with a fourth through hole (7221) for the cable (3) to pass through, and the sliding piece (722) slides back and forth on the fourth supporting rod (721) when the cable coil (8) rotates to withdraw the cable (3).

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