A cable threading device and a cable threading method for cable installation

Abstract

The present invention discloses a cable threading device and a threading method for cable installation, including a threading rod base. A pulling vehicle seat is fixedly installed at the bottom of the threading rod base, and a gear set structure is arranged inside the pulling vehicle seat. Among them, the gear set structure includes a coupling installed inside the pulling vehicle seat. Rear drive wheels are installed at both the left and right ends of the coupling. A first gear is arranged on the surface of the coupling, and a second gear is arranged on one side of the first gear; through the connection between the threading rod base and the pulling vehicle seat, wheels are arranged both front and rear on the pulling vehicle seat, and a gear set structure is installed inside the pulling vehicle seat. The gear set structure is interconnected with the rear drive wheels through the coupling. The pulling and automatic forward movement of the rear drive wheels are realized by using the different gear ratios of the gear set structure. A set of large gears in the gear set structure is interconnected with a torsion spring, and the elastic potential energy of the torsion spring is used to enable the rear drive wheels to achieve power-free driving, avoiding the waste of electric power resources.

Description

Technical Field

[0001] The present invention relates to the technical field of cable installation, and specifically, to a cable threading device and a cable threading method for cable installation. Background Art

[0002] Nowadays, with the booming development of the power industry, the rapid expansion of the data communication industry, the increasing improvement of the urban rail transit industry, the continuous innovation of the automotive industry, and the continuous growth of the shipbuilding industry, the demand for wires and cables in these industries shows a rapid growth trend. When producing cable wires in a factory, sometimes a cable threading device is used to pull the cable wires through the pipeline to be assembled. If the cable wires are in a bent state before threading, it is difficult to pull the cable wires into the pipeline.

[0003] The Chinese patent discloses a cable wire threading device for cable processing (publication number CN118701873A), which includes a frame, a moving frame, a displacement adjustment mechanism, and a tensioning mechanism. The moving frame is slidably connected to the frame and is adjusted in position in the frame under the drive of the displacement adjustment mechanism. The tensioning mechanism is arranged in the moving frame and is used to tension the cable being threaded. In the present invention, the driving roller is driven by a motor to rotate, driving the cable wire to move. Through the pressing adjustment component and the guiding component of the tensioning mechanism, on the one hand, the cable wire to be threaded can be tensioned, and on the other hand, the cable wire can be limited and straightened by the limiting cylinder with adjustable spacing, and it can also adapt to the straightening of cable wires of different sizes, thus facilitating the traction of the cable wire in the pipeline. When threading the cable, the above technical solution adopts a tensioning mechanism and straightens the cable, thus solving the problem of the cable being bent during the cable threading process. However, the equipment provided by the above solution has limitations for cable threading. And in the existing pipeline, multiple groups of cables need to be threaded. Multiple strands of cables are concentrated in the pipeline, so as to facilitate the buried laying of the cables through the pipeline and other path laying. For the threading of multiple strands of cables, on the one hand, single-strand threading is carried out one by one successively, and on the other hand, a driving device is used to complete rapid automatic threading. The threading efficiency is not good, and at the same time, power threading wastes electric power resources and is prone to failures, which is not conducive to the use at the cable laying site.

[0004] Therefore, those skilled in the art provide a cable threading device and a cable threading method for cable installation to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a cable threading device and a cable threading method for cable installation to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A cable threading device for cable installation, including a threading rod base, the bottom of the threading rod base is fixedly installed with a pulling-back vehicle seat, and a gear set structure is arranged inside the pulling-back vehicle seat;

[0008] Among them, the gear set structure includes a coupling installed inside the pulling-back vehicle seat. Both the left and right ends of the coupling are installed with rear drive wheels. The surface of the coupling is provided with a first gear. One side of the first gear is provided with a second gear, and the rear wall of the second gear is fixedly connected with a third gear. A fourth gear is installed above the third gear. A fifth gear is installed on the left side of the second gear, and a limiting groove is arranged on the front side of the fifth gear. A sixth gear is arranged on the left side of the fifth gear, and a large gear is integrally connected to the back of the sixth gear. The center of the back surface of the large gear is fixedly connected with a fixing piece. A spring winding box is installed on the back of the large gear, and a torsion spring is installed inside the spring winding box. A clamping groove is arranged on the inner wall of the spring winding box, and the clamping groove is mutually attached to one end of the torsion spring;

[0009] The outer side of the threading rod base is movably connected with an installation bracket, and the top end of the installation bracket is connected with a roller seat. An air suction cavity is installed on the outer side of the roller seat through a bracket, and the front end of the air suction cavity is connected with a cable adsorption cavity pipe. A wire hole is fixedly opened at the end of the cable adsorption cavity pipe. A negative pressure interface is arranged on the outer wall of the air suction cavity, and an air suction pipe is connected to the upper end of the negative pressure interface. A negative pressure air suction machine is installed at the upper end of the air suction pipe, and the negative pressure air suction machine is fixedly installed on the outer wall of the air suction cavity. The lower end of the installation bracket is rotationally connected with the threading rod base, and the upper end of the installation bracket is a rotational structure with the roller seat. A soft rubber neck is arranged inside the wire hole, and one end of the wire hole is connected with an air duct. The inside of the wire hole is mutually communicated with the inside of the air suction cavity through the air duct, and the wire holes and the air ducts are arranged in one-to-one correspondence.

[0010] As an implementation manner of the present invention, the large gear is mutually connected with the torsion spring through the fixing piece, and the large gear and the sixth gear are integrally fixedly connected.

[0011] As an implementation manner of the present invention, a micro telescopic cylinder is movably connected to the middle of the surface of the roller seat, and a shock absorption damping rod is installed on one side of the micro telescopic cylinder. A buffer spring is arranged on the surface of the shock absorption damping rod.

[0012] As an implementation manner of the present invention, a rolling belt is sleeved on the outer side of the roller seat, and the roller seats are distributed in a triangular shape with respect to the symmetry center line of the threading rod base.

[0013] As an implementation manner of the present invention, a front cover is fixed at the front end of the threading rod base, and a camera is installed inside the front cover. A transparent protective cover is fixedly installed on the outer side of the front cover through screws.

[0014] A cable threading method for a cable threading device used in cable installation, comprising the following steps:

[0015] S1: First, connect multiple strands of cables to the wire holes provided on the cable adsorption cavity tube in sequence. The negative pressure suction machine sucks air into the interior of the suction cavity through the suction pipe and the negative pressure interface, making the interior of the suction cavity in a negative pressure state. The suction cavity is interconnected with the wire holes inside the cable adsorption cavity tube through the air duct, and the multiple strands of cables are adsorbed inside the wire holes in sequence;

[0016] S2: Secondly, use the pulling seat at the bottom of the threading rod seat to move the threading rod seat, pull the rear drive wheels backward. During the pulling back, the first gear and the second gear mesh with each other, and both forward and reverse rotations mesh together. During the pulling back process, the fifth gear moves downward and meshes with the sixth gear on the large gear, and the fourth gear disengages from the large gear;

[0017] S3: When pulling back and storing energy, the large gear twists the torsion spring, causing the torsion spring to accumulate elastic potential energy. When released, the fifth gear moves in the opposite direction and disengages from the sixth gear on the large gear, and the fourth gear moves closer to the large gear and meshes. Utilize the elastic potential energy of the torsion spring to drive the rear drive wheels to rotate. The pulling seat moves along the interior of the pipeline under the rolling of the rear drive wheels, bringing multiple strands of cables into the pipeline, thereby completing the cable threading.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Through the connection between the threading rod seat and the pulling seat, wheels are provided at the front and rear of the pulling seat, and a gear set structure is installed inside the pulling seat. The gear set structure is interconnected with the rear drive wheels through a coupling. Utilize the different gear ratios of the gear set structure to achieve the pulling back and automatic forward movement of the rear drive wheels. A set of large gears in the gear set structure is interconnected with the torsion spring, and the elastic potential energy of the torsion spring is used to enable the rear drive wheels to achieve power-free drive, avoiding the waste of electric power resources, avoiding failures and damages of the driving equipment. Utilize the movement of the pulling seat in the pipeline to pass the cable through the pipeline and exit from the other end of the pipeline, completing the cable threading inside the pipeline. At the same time, through the settings of the threading rod seat and the pulling seat, it is also beneficial to perform cable threading operations at the cable laying site, with better flexibility in use and reduced limitations of cable threading;

[0020] 2. A cable adsorption cavity tube is installed on the rod-passing seat. The cable adsorption cavity tube is interconnected with the suction cavity, and the air duct between the suction cavity and the cable adsorption cavity tube is communicated. The cable is adsorbed and connected in the cable adsorption cavity tube by negative pressure adsorption, so as to facilitate the rod-passing seat to carry the cable through the pipeline. The negative pressure suction machine is connected to the suction cavity through the suction pipe and the negative pressure interface. Through the air duct communicated with the suction cavity, the cable adsorption cavity tube is communicated, so that the line hole in the cable adsorption cavity tube is in a negative pressure state. The negative pressure state is used to attract the cable to be installed in the line hole. A soft rubber neck is provided at the connection between the line hole and the air duct, and the soft rubber neck will protect the port of the cable to avoid wear of the cable port caused by negative pressure adsorption. Multiple groups of line holes are provided on the cable adsorption cavity tube, and multiple groups of cables can be connected at the same time. Then, multiple strands of cables can be brought into the pipeline through the rod-passing seat at the same time for cable threading, improving the cable threading efficiency. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a cable threading device and a cable threading method for cable installation.

[0022] Figure 2 It is a schematic front-end structural diagram of the rod-passing seat in a cable threading device and a cable threading method for cable installation.

[0023] Figure 3 It is a schematic front view structural diagram of the rod-passing seat in a cable threading device and a cable threading method for cable installation.

[0024] Figure 4 It is a schematic internal structural diagram of the pulling-back seat in a cable threading device and a cable threading method for cable installation.

[0025] Figure 5 It is a schematic connection structural diagram between gear sets in a cable threading device and a cable threading method for cable installation.

[0026] Figure 6 It is a schematic structural diagram of the cable adsorption cavity tube in a cable threading device and a cable threading method for cable installation.

[0027] Figure 7 It is a schematic internal sectional structural diagram of the cable adsorption cavity tube in a cable threading device and a cable threading method for cable installation.

[0028] In the figure: 1. Rod-piercing seat; 2. Pull-back seat; 201. Rear drive wheel; 202. Coupling; 203. First gear; 204. Second gear; 205. Third gear; 206. Fourth gear; 207. Fifth gear; 208. Sixth gear; 209. Large gear; 210. Spring winding box; 211. Limit groove; 212. Fixed piece; 213. Torsion spring; 214. Card slot; 3. Mounting bracket; 4. Roller seat; 5. Micro telescopic cylinder; 6. Shock-absorbing damping rod; 7. Buffer spring; 8. Rolling belt; 9. Cable adsorption cavity tube; 901. Wire hole; 902. Negative pressure interface; 903. Suction pipe; 904. Negative pressure suction machine; 905. Soft rubber neck; 906. Air duct; 907. Suction cavity; 10. Front cover; 11. Transparent protective cover; 12. Camera. Detailed implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 to 7 , the embodiment of the present invention provides a cable threading device for cable installation, including a rod-piercing seat 1, a pull-back seat 2 is fixedly installed at the bottom of the rod-piercing seat 1, and a gear set structure is arranged inside the pull-back seat 2;

[0031] Among them, the gear set structure includes a coupling 202 installed inside the pull-back seat 2. Rear drive wheels 201 are installed at both the left and right ends of the coupling 202. A first gear 203 is arranged on the surface of the coupling 202. A second gear 204 is arranged on one side of the first gear 203. And the rear wall of the second gear 204 is fixedly connected to a third gear 205. A fourth gear 206 is installed above the third gear 205. A fifth gear 207 is installed on the left side of the second gear 204. And a limit groove 211 is arranged on the front side of the fifth gear 207. A sixth gear 208 is arranged on the left side of the fifth gear 207. And the back of the sixth gear 208 is integrally connected to a large gear 209. A fixed piece 212 is fixedly connected to the center of the back surface of the large gear 209. A spring winding box 210 is installed on the back of the large gear 209. And a torsion spring 213 is installed inside the spring winding box 210;

[0032] An installation bracket 3 is movably connected to the outer side of the rod-passing seat 1, and a roller seat 4 is connected to the top of the installation bracket 3. An air suction chamber 907 is installed on the outer side of the roller seat 4 through a bracket, and a cable suction chamber tube 9 is connected to the front end of the air suction chamber 907. A wire hole 901 is fixedly opened at the end of the cable suction chamber tube 9. A negative pressure interface 902 is arranged on the outer wall of the air suction chamber 907. An air suction pipe 903 is connected to the upper end of the negative pressure interface 902. A negative pressure air suction machine 904 is installed at the upper end of the air suction pipe 903, and the negative pressure air suction machine 904 is fixedly installed on the outer wall of the air suction chamber 907.

[0033] The large gear 209 is interconnected with the torsion spring 213 through the fixing piece 212. The large gear 209 and the sixth gear 208 are integrally and fixedly connected. A card slot 214 is arranged on the inner wall of the spring box 210, and the card slot 214 is mutually attached to one end of the torsion spring 213;

[0034] Specifically, the gear set structure includes multiple gears with different gear ratios. By utilizing the different gear ratios, when the large gear 209 rotates one full circle, the connected rear drive wheel 201 can rotate multiple circles, thereby achieving unpowered movement, driving the rod-piercing seat 1 to move in the pipeline, and then driving the cable to pass through the pipeline. The large gear 209 is interconnected with the torsion spring 213. The torsion spring 213 is curled and arranged in the spring box 210. The curled torsion spring 213 has elastic potential energy, and this elastic potential energy is used to drive the large gear 209 to rotate. In this way, there is no need to use a power driving device to drive, avoiding waste of electric power resources. During use, the rod-piercing seat 1 is moved by the pulling-back seat 2 at the bottom of the rod-piercing seat 1. Among them, the first gear 203 and the second gear 204 are meshed with each other regardless of whether they rotate forward or backward. Then, the pulling-back seat 2 is pulled backward. When pulling back, the fifth gear 207 moves downward and meshes with the sixth gear 208 on the large gear 209. The large gear 209 and the sixth gear 208 are integrally connected. Therefore, the sixth gear 208 and the large gear 209 are combined as one. When the fifth gear 207 moves downward, the fourth gear 206 disengages from the large gear 209. When pulling back and storing energy, the large gear 209 rotates under the meshing cooperation of the fifth gear 207 and the sixth gear 208. Furthermore, the large gear 209 twists the torsion spring 213 through the connection of the fixing piece 212, causing the torsion spring 213 to accumulate elastic potential energy. One end of the torsion spring 213 will gradually disengage from the limiting groove 211 on the inner wall of the spring box 210 while twisting. When the rod-piercing seat 1 is released, when the pulling-back seat 2 is released, the fifth gear 207 moves in the opposite direction and disengages from the sixth gear 208 on the large gear 209. At the same time, the fourth gear 206 approaches and meshes with the large gear 209. Utilizing the elastic potential energy of the torsion spring 213, the rear drive wheel 201 is driven to rotate. The pulling-back seat 2 moves along the inside of the pipeline under the rolling of the rear drive wheel 201, bringing multiple strands of cable into the pipeline, and thus completing the cable threading.

[0035] The lower end of the mounting bracket 3 is rotatably connected to the rod-piercing seat 1, and the upper end of the mounting bracket 3 is a rotational structure with the roller seat 4. A micro telescopic cylinder 5 is movably connected to the middle of the surface of the roller seat 4. One side of the micro telescopic cylinder 5 is equipped with a shock-absorbing damping rod 6. A buffer spring 7 is arranged on the surface of the shock-absorbing damping rod 6. A rolling belt 8 is sleeved outside the roller seat 4, and the roller seat 4 is distributed in a triangular shape with respect to the symmetry center line of the rod-piercing seat 1.

[0036] Specifically, roller seats 4 are provided at both the upper and lower ends of the mounting bracket 3. The roller seats 4 are combined with the rolling belt 8 provided on the outside. When the pull-back seat 2 drives the rod-through seat 1 to move in the pipeline, the rolling belt 8 and the rollers inside the roller seats 4 cooperate with each other to roll in the pipeline, and cooperate with the wheels to drive the rod-through seat 1 to move. After the torsional elastic potential energy of the rear drive wheel 201 disappears, it will move forward by inertia. The rolling belt 8 can prevent the rod-through seat 1 from moving too far forward by inertia and avoid damage to the rod-through seat 1. During the movement in cooperation with the rear drive wheel 201, the rolling belt 8 and the rollers inside the roller seats 4 cooperate with each other to move along the inner wall of the pipeline. At the same time, according to the inner space diameter of the pipeline, the micro telescopic cylinder 5 is used to pull the mounting bracket 3 for angle adjustment. The upper and lower ends of the mounting bracket 3 are respectively rotatably connected to the roller seat 4 and the rod-through seat 1. When the mounting bracket 3 is perpendicular to the rod-through seat 1, the external structural dimensions of the rod-through seat 1 are enlarged, so that the rod-through seat 1 can better adapt to the inside of pipelines of different sizes. At the same time, the shock-absorbing damping rod 6 and the buffer spring 7 cooperate with each other to achieve the shock-absorbing effect on the roller seat 4 and the rod-through seat 1. And the combination of the shock-absorbing damping rod 6 and the buffer spring 7 can consume the potential energy of the spring while improving the shock-absorbing effect.

[0037] A front cover 10 is fixed to the front end of the rod-through seat 1, and a camera 12 is installed inside the front cover 10. A transparent protective cover 11 is fixedly installed on the outside of the front cover 10 by screws;

[0038] Specifically, the front end with the camera 12 installed is aligned with the inside of the pipeline. During the movement of the rod-through seat 1, the camera 12 monitors the inside of the pipeline, which is convenient for cable laying and at the same time checks the inside of the cable laying pipeline.

[0039] A soft rubber neck 905 is provided inside the wire hole 901. One end of the wire hole 901 is connected to an air duct 906. The inside of the wire hole 901 is interconnected with the inside of the air suction cavity 907 through the air duct 906. The wire holes 901 and the air ducts 906 are provided in one-to-one correspondence;

[0040] Specifically, according to the actual number of cables to be threaded, the required multi-strand cables are successively butted into the wire holes 901 provided on the cable adsorption cavity tube 9. The negative pressure suction machine 904 sucks the inside of the suction cavity 907 through the suction pipe 903 and the negative pressure interface 902, making the inside of the suction cavity 907 in a negative pressure state. The suction cavity 907 is interconnected with the wire holes 901 inside the cable adsorption cavity tube 9 through the air duct 906. When the inside of the wire hole 901 is in a negative pressure state, the cable is sucked deep into the inside of the wire hole 901. The sucked cable port will be in the soft rubber neck 905. The size from the soft rubber neck 905 to the air duct 906 gradually decreases. While preventing the cable port from entering the air duct 906, it can also block the cable port at the opening end of the air duct 906 by negative pressure adsorption, avoiding the destruction of the negative pressure environment. In this way, it is beneficial to successively and tightly adsorb the multi-strand cables inside the wire holes 901. In this way, the rod threading base 1 is convenient for carrying the multi-strand cables through the pipeline.

[0041] A cable threading method for a cable threading device for cable installation, comprising the following steps:

[0042] S1: First, successively butt the multi-strand cables into the wire holes 901 provided on the cable adsorption cavity tube 9. The negative pressure suction machine 904 sucks the inside of the suction cavity 907 through the suction pipe 903 and the negative pressure interface 902, making the inside of the suction cavity 907 in a negative pressure state. The suction cavity 907 is interconnected with the wire holes 901 inside the cable adsorption cavity tube 9 through the air duct 906, and successively adsorb the multi-strand cables inside the wire holes 901;

[0043] S2: Second, use the pull-back seat 2 at the bottom of the rod threading base 1 to move the rod threading base 1. Pull the rear drive wheel 201 backward. During the pull-back, the first gear 203 and the second gear 204 mesh with each other, and mesh together in both forward and reverse rotations. During the pull-back process, the fifth gear 207 moves downward and meshes with the sixth gear 208 on the large gear 209, and the fourth gear 206 disengages from the large gear 209;

[0044] S3: When pulling back and storing energy, the large gear 209 twists the torsion spring 213, causing the torsion spring 213 to accumulate elastic potential energy. When released, the fifth gear 207 moves in the opposite direction and disengages from the sixth gear 208 on the large gear 209, and the fourth gear 206 moves closer to and meshes with the large gear 209. Utilize the elastic potential energy of the torsion spring 213 to drive the rear drive wheel 201 to rotate. The pull-back seat 2 moves along the inside of the pipeline under the rolling of the rear drive wheel 201, bringing the multi-strand cables into the pipeline, and thus completing the cable threading.

[0045] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A cable threading device for cable installation, characterized in that: It comprises a rod-penetrating seat (1), a pull-back seat (2) being fixedly mounted on the bottom of the rod-penetrating seat (1), and a gear set structure being arranged inside the pull-back seat (2); The gear set structure comprises a coupling shaft (202) installed inside a pull-back seat (2), rear-drive wheels (201) are installed at both left and right ends of the coupling shaft (202), a first gear (203) is arranged on the surface of the coupling shaft (202), a second gear (204) is arranged on one side of the first gear (203), a third gear (205) is fixedly connected to the rear wall of the second gear (204), a fourth gear (206) is installed above the third gear (205), a fifth gear (207) is installed on the left side of the second gear (204), and the fifth gear (20 7), a limiting groove (211) is provided on the front side of the fifth gear (207), a sixth gear (208) is provided on the left side of the fifth gear (207), and a large gear (209) is integrally connected to the back of the sixth gear (208), a fixing plate (212) is fixedly connected to the center of the back surface of the large gear (209), a coil spring box (210) is installed on the back of the large gear (209), and a torsion spring (213) is installed inside the coil spring box (210), and a clamping groove (214) is provided on the inner wall of the coil spring box (210), and the clamping groove (214) and one end of the torsion spring (213) are mutually fitted; The outer side of the rod-piercing seat (1) is movably connected to a mounting bracket (3), and the top end of the mounting bracket (3) is connected to a roller seat (4), the outer side of the roller seat (4) is equipped with an air suction chamber (907) through the bracket, and the front end of the air suction chamber (907) is connected to a cable adsorption chamber tube (9), and the end of the cable adsorption chamber tube (9) is fixedly provided with a wire hole (901), the outer wall of the air suction chamber (907) is provided with a negative pressure interface (902), the upper end of the negative pressure interface (902) is connected to an air suction pipe (903), and the upper end of the air suction pipe (903) is equipped with a negative pressure suction machine (904), the negative pressure suction machine (904) is fixedly mounted on the outer wall of the suction chamber (907), the lower end of the mounting bracket (3) is rotatably connected to the rod seat (1), and the upper end of the mounting bracket (3) and the roller seat (4) are rotatably connected, the interior of the wire hole (901) is provided with a soft rubber neck (905), one end of the wire hole (901) is connected to an airway (906), the interior of the wire hole (901) is interconnected with the interior of the suction chamber (907) through the airway (906), and the wire hole (901) and the airway (906) are arranged one-to-one.

2. A cable threading device for cable installation according to claim 1, characterized in that: The large gear (209) is connected to each other via a fixing plate (212) and a torsion spring (213), and the large gear (209) and the sixth gear (208) are integrally fixedly connected.

3. A cable threading device for cable installation according to claim 1, characterized in that: A micro telescopic cylinder (5) is movably connected in the middle of the surface of the roller seat (4), and a shock absorbing damping rod (6) is installed on one side of the micro telescopic cylinder (5), and a buffer spring (7) is arranged on the surface of the shock absorbing damping rod (6).

4. A cable threading device for cable installation according to claim 1, characterized in that: The outer sleeve of the roller seat (4) is provided with a rolling belt (8), and the roller seat (4) is distributed in a triangular shape with respect to the symmetric center line of the rod-piercing seat (1).

5. A cable threading device for cable installation according to claim 1, characterized in that: A front cover (10) is fixed to the front end of the rod-piercing seat (1), and a camera (12) is installed inside the front cover (10). A transparent protective cover (11) is fixed to the outside of the front cover (10) by screws.

6. A cable threading method using a cable threading device for cable installation according to claim 1, characterized in that: The following steps are involved: S1: First, multiple cables are connected in sequence to the wire holes (901) provided on the cable adsorption cavity tube (9), and the negative pressure suction machine (904) suctions the interior of the suction cavity (907) through the suction tube (903) and the negative pressure interface (902), so that the interior of the suction cavity (907) is in a negative pressure state, and the suction cavity (907) is connected to the wire holes (901) inside the cable adsorption cavity tube (9) through the airway (906), and the multiple cables are adsorbed in sequence inside the wire holes (901); S2: Secondly, the rod-piercing seat (1) is moved by using the retracting seat (2) at the bottom of the rod-piercing seat (1) to pull the rear-drive wheel (201) backwards. When pulling back, the first gear (203) and the second gear (204) are meshed with each other, and both forward and reverse rotations are meshed with each other. During the pulling back process, the fifth gear (207) moves downward and meshes with the sixth gear (208) on the large gear (209), and the fourth gear (206) is disengaged from the large gear (209). S3: When pulling back to store force, the large gear (209) twists the torsion spring (213), so that the torsion spring (213) accumulates elastic potential energy. When releasing, the fifth gear (207) moves in the opposite direction and disengages from the sixth gear (208) on the large gear (209). The fourth gear (206) approaches the large gear (209) to engage with the large gear (209). The elastic potential energy of the torsion spring (213) is used to drive the rear drive wheel (201) to rotate. The pull-back seat (2) moves along the inside of the pipeline under the rolling of the rear drive wheel (201), bringing the multiple cables into the pipeline, thereby completing the cable threading.

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