A pipe threading device for electrical construction

Abstract

The application relates to the technical field of threading devices, and discloses a pipe threading device for power construction, which comprises two front-and-rear symmetrical side supports, the lower ends of the two side supports are rotationally connected with an axle, the front and rear ends of the axle are connected with moving wheels, the centers of the two side supports are rotationally connected with a central shaft, the front end of the central shaft is connected with a rocking handle, the outer wall of the central shaft is connected with a wire reel, the outer wall of the wire reel is connected with a traction cable, the end of the traction cable is connected with a threading assembly, and the inner walls of the two side supports are connected with a lead shell between the upper parts of the inner walls; the device can solve the pain point of complicated wire fixing in traditional equipment, realizes automatic pushing by means of a mechanical transmission system, effectively improves the overall pipe threading efficiency, and has the advantages of convenient movement, durable structure and flexible operation, and can effectively meet the pipe threading demand of power construction.

Description

Technical Field

[0001] This invention relates to the field of wiring devices, and more particularly to a conduit wiring device for power construction. Background Technology

[0002] In power engineering construction, conduit threading is a crucial step in laying cables and conductors, and its efficiency and quality directly affect the overall construction progress. Cables are composed of several or groups of conductors used for transmitting electrical energy or signals. When threading cables through conduits, a pulling head is used to secure the cable ends before passing them through the conduit. Currently, traditional conduit threading operations mostly rely on simple cable pullers or manual pulling methods, which present the following technical challenges:

[0003] 1. Cumbersome cable fixing methods: The connection between the pull end of the existing cable puller and the cable is mostly fixed by wrapping with tape, binding with steel wire or knotting. This is not only time-consuming, but also easy to damage the cable insulation layer, and subsequent disassembly is very inconvenient.

[0004] 2. High labor intensity of manual traction: Traditional equipment requires manual operation to turn the crank to release or retrieve the traction cable. For long-distance or multi-bend pipelines, the traction resistance increases significantly, making it difficult for a single person to operate. Furthermore, uneven force can easily cause the cable to deviate or wear.

[0005] 3. Poor adaptability to threading: The traction head of ordinary threaders is mostly a rigid structure, which is prone to jamming at pipe bends and is difficult to adapt to pipes with different inner diameters; at the same time, the traction cable is often prone to breakage due to material issues when repeatedly bent or under load, affecting its service life.

[0006] Therefore, there is an urgent need to develop a power construction conduit cable puller that is easy to operate, reliable in its fixation, and highly adaptable to meet the cable pulling requirements of complex power construction environments. To this end, we propose a conduit cable puller for power construction. Summary of the Invention

[0007] The purpose of this invention is to provide a conduit cable puller for power construction, so as to overcome the technical problems existing in the prior art.

[0008] To achieve the above-mentioned technical objectives and effects, the present invention provides the following technical solution:

[0009] A conduit cable puller for power construction includes two symmetrically arranged side supports. The lower ends of the two side supports are rotatably connected to an axle. The front and rear ends of the axle are connected to movable wheels. The center of the two side supports is rotatably connected to a central shaft. The front end of the central shaft is connected to a crank handle. A winding reel is connected to the outer wall of the central shaft. A traction cable is connected to the outer wall of the winding reel. The end of the traction cable is connected to a cable pulling assembly. A lead wire shell is connected between the upper inner walls of the two side supports.

[0010] Preferably, in a conduit cable puller for power construction, the cable puller assembly includes a cable puller housing and a conical cap. The tip of the conical cap is connected to a retaining ring, which is connected to the free end of a traction cable. The top of the inner wall of the conical cap is provided with an internal thread. The top of the cable puller housing has four cable inlet holes. The lower part of the outer wall of the cable puller housing is provided with an assembly thread. The upper part of the side wall of the cable puller housing has four rectangular openings circumferentially, and guide wheels are installed in the rectangular openings.

[0011] Preferably, in a conduit threader for power construction, the lower end of the threading housing is circumferentially connected with multiple flexible springs, the inner cavity of the threading housing is connected with a fixed partition, the outer side of the fixed partition has four arc-shaped openings, the bottom center of the fixed partition is connected with a rubber column, the outer wall of the rubber column is evenly distributed with wear-resistant protrusions, the bottom of the rubber column has a mating interface, the mating interface is surrounded by a partition groove, the inner wall center of the conical cap is connected with a connecting post, and the upper end of the connecting post is connected with a compression block.

[0012] Preferably, in a conduit threader for power construction, the lower part of the extrusion block is cylindrical and the upper part is conical. The diameter of the lower part of the extrusion block is larger than the diameter of the interface hole, and the arc opening is located directly below the inlet hole.

[0013] Preferably, in a conduit threader for power construction, the outer side wall of the lead wire housing is provided with slide rails at both the front and rear, and a slider is slidably connected in the slide rail. A transmission housing is connected between the left and right sets of sliders. A horizontal screw is rotatably connected to the center of the left side wall of the lead wire housing. A nut seat is screwed to the outer wall of the horizontal screw. A traction rod is hinged between the outer wall of the nut seat and the left slider. A lifting handle is connected to the top of the lead wire housing.

[0014] Preferably, in a conduit threader for power construction, a through hole is provided in the slider on the right side, a horizontal shaft is rotatably connected to the right side of the transmission housing, a push wheel is connected to the right end of the horizontal shaft extending out of the through hole, a bevel gear is connected to the left end of the horizontal shaft extending into the transmission housing, a hollow tube is rotatably connected inside the transmission housing, a bevel gear ring is connected to the outer wall of the hollow tube, the bevel gear ring meshes with the bevel gear, and a limit strip is connected to the inner wall of the hollow tube.

[0015] Preferably, in a conduit threader for power construction, two conical tooth rings are arranged symmetrically front to back.

[0016] Preferably, in a conduit threader for power construction, a battery, a drive motor and a control switch are connected to the outer wall of the rear side bracket. The control switch is electrically connected to the drive motor and the battery. The output end of the drive motor is connected to a longitudinal shaft. A guide groove is provided on the outer wall of the longitudinal shaft. The longitudinal shaft passes through a hollow tube and is coaxially aligned. The limiting strip is slidably connected to the guide groove.

[0017] Preferably, in a conduit threader for power construction, friction protrusions are evenly distributed on the outer circumferential walls of the two push wheels, and retaining rings are connected to the left end of the front push wheel and the right end of the rear push wheel. An L-shaped seat is connected to the bottom wall of the lead wire housing, and a rope-passing hole is opened on the horizontal part of the L-shaped seat, through which the traction cable passes.

[0018] Preferably, in a conduit cable puller for power construction, the traction cable includes a plastic cable core, a winding rope, and a wrapping layer arranged sequentially from the inside out. The plastic cable core is made of modified high-density polyethylene material as the base material, and the cross-section of the plastic cable core is arranged in a star-shaped structure. The winding rope is a composite bundle of para-aramid fiber and galvanized steel wire wound around the surface of the plastic cable core at a 60-degree helical angle. The wrapping layer is injection molded from polyurethane elastomer.

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

[0020] 1. The present invention has a reasonable structural design, convenient and quick wire threading operation, and strong adaptability. Through the combination of side support, moving wheel and winding reel, the device can be moved flexibly and the traction cable can be easily wound and unwound. The conical structure and guide wheel design of the wire threading component can pass smoothly in the pipe and adapt to construction pipes of different diameters. The three-layer composite structure of the traction cable has both high flexibility and strong tensile strength, and can adapt to repeated bending and long-term load-bearing, meeting the basic traction requirements of pipe threading.

[0021] 2. This invention optimizes the wire fixing method and effectively improves operation efficiency. The invention adds a flexible spring, rubber column and extrusion block structure to the wire threading assembly. Through the threaded engagement of the conical cap and the wire threading housing, the deformation of the rubber column and the extrusion of the flexible spring are used to achieve quick clamping and fixing of the wire. It can replace the traditional fixing method of wrapping tape or knotting wires. It not only reduces wire damage, but also shortens the loading and unloading time. It is especially suitable for the simultaneous threading of multiple wires and significantly improves the convenience of construction.

[0022] 3. This invention can realize the automated pushing of the traction cable, enhancing adaptability and labor saving. The friction can be adjusted by adjusting the distance between the pushing wheels, which facilitates the clamping and pushing of the traction cable. The hollow tube rotates synchronously with the longitudinal axis. The transmission is achieved by the meshing of the bevel gear and the bevel gear ring, so that the traction cable is automatically pushed in the pipe after the pushing wheel rotates, reducing the intensity of manual labor.

[0023] In summary, this device solves the pain point of cumbersome wire fixing in traditional equipment, and achieves automated pushing through a mechanical transmission system, effectively improving the overall efficiency of pipe threading. Moreover, the equipment is easy to move, durable in structure, and flexible in operation, and can effectively meet the pipe threading needs of power construction. Attached Figure Description

[0024] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the external structure of the threading assembly in this invention;

[0028] Figure 4 This is a schematic diagram of the cable threading and fixing method in this invention. Figure 1 ;

[0029] Figure 5 This is a schematic diagram of the cable threading and fixing method in this invention. Figure 2 ;

[0030] Figure 6 This is a cross-sectional view of the wire-threading housing in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the fixed partition in this invention;

[0032] Figure 8 This is a schematic diagram of the structure of the rubber column in this invention;

[0033] Figure 9 This is a schematic diagram of the conical screw cap structure in this invention;

[0034] Figure 10 This is a schematic diagram of the external structure of the lead shell in this invention;

[0035] Figure 11 This is a top view of the longitudinal axis structure in this invention;

[0036] Figure 12 This is a schematic diagram of the internal structure of the transmission housing in this invention;

[0037] Figure 13 This is a schematic diagram of the push wheel structure in this invention;

[0038] Figure 14 This is a schematic diagram of the cross-section of the traction cable in this invention.

[0039] In the diagram: 1. Side support; 2. Axle; 3. Moving wheel; 4. Central shaft; 5. Handle; 6. Winding reel; 7. Traction cable; 8. Threading assembly; 9. Lead wire housing;

[0040] 101. Battery; 102. Drive motor; 103. Control switch; 104. Longitudinal shaft; 105. Guide groove;

[0041] 701. Plastic cable core; 702. Wrapped rope; 703. Sheathing layer;

[0042] 801. Cable housing; 802. Conical cap; 803. Retaining ring; 804. Cable inlet; 805. Rectangular opening; 806. Guide wheel;

[0043] 811. Flexible spring; 812. Fixed partition; 813. Arc opening; 814. Rubber column; 815. Wear-resistant protrusion; 816. Butt joint; 817. Separating groove; 821. Butt joint post; 822. Extrusion block;

[0044] 901. Slide rail; 902. Slider; 903. Transmission housing; 904. Horizontal screw; 905. Nut seat; 906. Traction rod; 907. L-shaped seat;

[0045] 921. Through hole; 922. Horizontal shaft; 923. Push wheel; 924. Bevel gear; 925. Friction protrusion; 926. Retaining ring;

[0046] 931. Hollow tube; 932. Conical tooth ring; 933. Limiting strip; 971. Rope passage hole. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] Please see Figure 1-14As shown, this embodiment is a conduit cable puller for power construction, including two side supports 1 arranged symmetrically front and rear. The lower ends of the two side supports 1 are rotatably connected to a wheel axle 2. The front and rear ends of the wheel axle 2 are connected to movable wheels 3. The center of the two side supports 1 is rotatably connected to a central shaft 4. The front end of the central shaft 4 is connected to a crank handle 5. The outer wall of the central shaft 4 is connected to a winding reel 6. The outer wall of the winding reel 6 is connected to a traction cable 7. The end of the traction cable 7 is connected to a cable pulling assembly 8. The upper part of the inner wall of the two side supports 1 is connected to a lead wire shell 9.

[0050] The cable threading assembly 8 includes a cable threading housing 801 and a conical cap 802. The tip of the conical cap 802 is connected to a retaining ring 803, which is connected to the free end of the traction cable 7. The top of the inner wall of the conical cap 802 is provided with an internal thread. The top of the cable threading housing 801 is provided with four cable inlet holes 804. The lower part of the outer wall of the cable threading housing 801 is provided with an assembly thread. The upper part of the side wall of the cable threading housing 801 is provided with four rectangular openings 805, and guide wheels 806 are installed in the rectangular openings 805.

[0051] The traction cable 7 includes a plastic cable core 701, a winding rope 702, and a wrapping layer 703 arranged sequentially from the inside out. The plastic cable core 701 is made of modified high-density polyethylene material as the base material and has a star-shaped cross-section. The winding rope 702 is a composite bundle of para-aramid fiber and galvanized steel wire, wound around the surface of the plastic cable core 701 at a 60-degree helical angle. The wrapping layer 703 is injection molded from polyurethane elastomer.

[0052] The specific implementation method of this embodiment is as follows:

[0053] In use, the entire device is moved to the work area by the moving wheels 3. The threading assembly 8 is inserted into the conduit to be threaded. The winding reel 6 can rotate with the central shaft 4, thereby winding and unwinding the traction cable 7. The upper side wall of the threading housing 801 has four rectangular openings 805 circumferentially oriented. Guide wheels 806 are installed in the rectangular openings 805 to facilitate the movement of the threading assembly 8 in the conduit. After the threading assembly 8 extends out of the conduit, the threading housing 801 is rotated to separate it from the conical cap 802. The wire end of the cable to be threaded is pulled out of the insulation layer. The wire end extends into the threading housing 801 along the inlet hole 804 and is then wound (e.g., ...). Figure 4 As shown), the cable housing 801 is reinstalled in the opening of the conical cap 802 by using the assembly thread and the internal thread. The central shaft 4 is rotated by the crank 5. After the cable 7 is wound up, the cable passes through the inside of the pipe with the cable assembly 8, thereby realizing the pipe cable threading operation.

[0054] The traction cable 7 comprises, from the inside out, a plastic cable core 701, a winding rope 702, and a sheathing layer 703. The plastic cable core 701 is made of modified high-density polyethylene substrate and designed with a star-shaped cross-section, giving the cable core excellent flexibility and creep resistance, which can adapt to repeated bending and long-term load-bearing scenarios, avoiding structural failure caused by plastic deformation. The protruding edges of the star-shaped cross-section can form a mechanical engagement with the winding rope 702, greatly enhancing the friction between the two, effectively preventing relative slippage, and improving the overall structure's collaborative load-bearing capacity. The winding rope 702 is made of a composite bundle material of para-aramid fiber and galvanized steel wire, ensuring the core load-bearing capacity of the cable. The galvanized steel wire enhances the shear resistance and wear resistance, extending the service life. The 60-degree helix angle design allows the winding layer to evenly distribute the load, avoiding local stress concentration. The polyurethane elastomer injection-molded sheathing layer 702 can tightly wrap the internal structure, forming a physical protective barrier, so that the traction cable 7 as a whole has high tensile strength, good flexibility, excellent weather resistance, and structural stability, which can meet the traction needs of pipeline wiring.

[0055] Example 2

[0056] Based on Embodiment 1, a plurality of flexible springs 811 are circumferentially connected to the lower end of the wire threading housing 801, a fixed partition 812 is connected to the middle of the inner cavity of the wire threading housing 801, four arc-shaped openings 813 are circumferentially opened on the outer side of the fixed partition 812, a rubber column 814 is connected to the bottom center of the fixed partition 812, wear-resistant protrusions 815 are evenly distributed on the outer wall of the rubber column 814, a mating interface 816 is opened at the bottom of the rubber column 814, and a partition groove 817 is connected around the mating interface 816. A docking post 821 is connected to the center of the inner wall of the conical screw cap 802, and a pressing block 822 is connected to the upper end of the docking post 821.

[0057] The extrusion block 822 has a cylindrical structure at the bottom and a conical structure at the top. The diameter of the lower part of the extrusion block 822 is larger than the diameter of the interface 816. The arc opening 813 is located directly below the inlet hole 804.

[0058] The specific implementation method of this embodiment is as follows:

[0059] In this embodiment, a fixing partition 812 and a rubber column 814 are provided inside the wire housing 801. After the end of the wire passes through the inlet hole 804 and the arc opening 813, it approaches the rubber column 814. A conical cap 802 is rotated and installed outside the wire housing 801. As the distance between the wire housing 801 and the conical cap 802 shortens, the compression block 822 at the upper end of the mating column 821 is inserted into the mating interface 816. The lower diameter of the compression block 822 is larger than the hole diameter of the mating interface 816. The mating interface 816 is surrounded by a partition groove 817, which causes the lower end of the rubber column 814 to deform outward. Multiple flexible springs 811 are circumferentially connected to the lower end of the wire housing 801. The flexible springs 811 are deformed by the inner wall of the conical cap 802. The flexible springs 811 and the rubber column 814 fix and clamp the wire (e.g., Figure 5 As shown, the wear-resistant bumps 815 further increase the friction, eliminating the need to wrap or knot the wires, making loading and unloading more convenient.

[0060] Example 3

[0061] Based on Embodiment 2, slideways 901 are provided on the front and rear parts of the outer side wall of the lead wire housing 9. A slider 902 is slidably connected in the slideway 901. A transmission housing 903 is connected between the left and right sets of sliders 902. A horizontal screw 904 is rotatably connected to the center of the left side wall of the lead wire housing 9. A nut seat 905 is screwed to the outer wall of the horizontal screw 904. A traction rod 906 is hinged between the outer wall of the nut seat 905 and the left slider 902. A lifting handle is connected to the top of the lead wire housing 9.

[0062] A through hole 921 is provided in the right slider 902. A horizontal shaft 922 is rotatably connected to the right side of the transmission housing 903. The right end of the horizontal shaft 922 extending out of the through hole 921 is connected to a push wheel 923. The left end of the horizontal shaft 922 extending into the transmission housing 903 is connected to a bevel gear 924. A hollow tube 931 is rotatably connected inside the transmission housing 903. A bevel gear ring 932 is connected to the outer wall of the hollow tube 931. The bevel gear ring 932 meshes with the bevel gear 924. A limit strip 933 is connected to the inner wall of the hollow tube 931. The two bevel gear rings 932 are symmetrically arranged, so that the two push wheels 923 rotate in opposite directions.

[0063] A battery 101, a drive motor 102, and a control switch 103 are connected to the outer wall of the rear side bracket 1. The control switch 103 is electrically connected to the drive motor 102 and the battery 101. The output end of the drive motor 102 is connected to a longitudinal shaft 104. A guide groove 105 is provided on the outer wall of the longitudinal shaft 104. The longitudinal shaft 104 passes through the hollow tube 931 and is set with a coaxial centerline. The limit strip 933 is slidably connected to the guide groove 105.

[0064] Friction protrusions 925 are evenly distributed on the outer circumference of the two push wheels 923. The left end of the front push wheel 923 and the right end of the rear push wheel 923 are both connected to retaining rings 926. The bottom wall of the lead wire housing 9 is connected to an L-shaped seat 907. A rope hole 971 is opened on the horizontal part of the L-shaped seat 907, and the traction cable 7 passes through the rope hole 971.

[0065] The specific implementation method of this embodiment is as follows:

[0066] In this embodiment, the traction cable 7 passes through the rope hole 971 and between the two push wheels 923. Rotating the horizontal screw 904 causes the nut seat 905 to drive the traction rod 906 to deflect. The front and rear sets of sliders 902 can move relative to each other along the slide 901, thereby adjusting the distance between the two push wheels 923 so that the friction protrusions 925 are in contact with the outer wall of the traction cable 7, ensuring the subsequent pushing effect. The retaining ring 926 is used to prevent the traction cable 7 from detaching.

[0067] The drive motor 102 is started by the control switch 103. The guide groove 105 and the limit bar 923 cooperate to guide the hollow tube 931 to rotate synchronously with the longitudinal shaft 104. This causes the bevel gear ring 932 to mesh with the transmission bevel gear 924. The horizontal shaft 922 drives the push wheel 923 to rotate. The two bevel gear rings 932 are symmetrically arranged front and back, so that the two push wheels 923 rotate in opposite directions, which can realize the automatic push of the traction cable 7 and improve the efficiency of pipe threading.

[0068] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A conduit cable puller for power construction, comprising two symmetrically arranged side supports (1), characterized in that: The lower ends of the two side supports (1) are rotatably connected to a wheel axle (2), and the front and rear ends of the wheel axle (2) are connected to movable wheels (3). The center of the two side supports (1) is rotatably connected to a central shaft (4). The front end of the central shaft (4) is connected to a crank handle (5). The outer wall of the central shaft (4) is connected to a winding reel (6). The outer wall of the winding reel (6) is connected to a traction cable (7). The end of the traction cable (7) is connected to a threading assembly (8). The upper part of the inner wall of the two side supports (1) is connected to a lead wire shell (9). The threading assembly (8) includes a threading housing (801) and a conical cap (802). The tip of the conical cap (802) is connected to a retaining ring (803), which is connected to the free end of the traction cable (7). The top of the inner wall of the conical cap (802) is provided with an internal thread. The top of the threading housing (801) is provided with four inlet holes (804). The lower part of the outer wall of the threading housing (801) is provided with an assembly thread. The upper part of the side wall of the threading housing (801) is provided with four rectangular openings (805) circumferentially. Guide wheels (806) are installed in the rectangular openings (805). The lower end of the threading housing (801) is circumferentially connected with multiple flexible springs (811). The inner cavity of the threading housing (801) is connected with a fixed partition (812). The outer side of the fixed partition (812) is provided with four arc-shaped openings (813). The bottom center of the fixed partition (812) is connected with a rubber column (814). The outer wall of the rubber column (814) is evenly distributed with wear-resistant protrusions (815). The bottom of the rubber column (814) is provided with a mating interface (816). The four sides of the mating interface (816) are connected with a partition groove (817). The inner wall center of the conical screw cap (802) is connected with a mating post (821). The upper end of the mating post (821) is connected with a pressing block (822). The extrusion block (822) has a cylindrical structure at the bottom and a conical structure at the top. The diameter of the lower part of the extrusion block (822) is larger than the diameter of the interface (816). The arc opening (813) is located directly below the inlet hole (804).

2. A conduit cable puller for power construction according to claim 1, characterized in that: The lead wire housing (9) has slides (901) on both the front and rear sides of its outer side wall. A slider (902) is slidably connected in the slide (901). A transmission housing (903) is connected between the two sets of sliders (902). A horizontal screw (904) is rotatably connected to the center of the left side wall of the lead wire housing (9). A nut seat (905) is screwed onto the outer wall of the horizontal screw (904). A traction rod (906) is hinged between the outer wall of the nut seat (905) and the left slider (902). A lifting handle is connected to the top of the lead wire housing (9).

3. A conduit puller for power construction according to claim 2, characterized in that: A through hole (921) is provided in the slider (902) on the right side. A horizontal shaft (922) is rotatably connected to the right side of the transmission housing (903). A push wheel (923) is connected to the right end of the horizontal shaft (922) that extends out of the through hole (921). A bevel gear (924) is connected to the left end of the horizontal shaft (922) that extends into the transmission housing (903). A hollow tube (931) is rotatably connected inside the transmission housing (903). A bevel gear ring (932) is connected to the outer wall of the hollow tube (931). The bevel gear ring (932) meshes with the bevel gear (924). A limit strip (933) is connected to the inner wall of the hollow tube (931).

4. A conduit puller for power construction according to claim 3, characterized in that: The two bevel gear rings (932) are arranged symmetrically front to back.

5. A conduit puller for power construction according to claim 3, characterized in that: The outer wall of the rear side bracket (1) is connected to a battery (101), a drive motor (102) and a control switch (103). The control switch (103) is electrically connected to the drive motor (102) and the battery (101). The output end of the drive motor (102) is connected to a longitudinal shaft (104). The outer wall of the longitudinal shaft (104) is provided with a guide groove (105). The longitudinal shaft (104) passes through the hollow tube (931) and is coaxially arranged. The limiting strip (933) is slidably connected to the guide groove (105).

6. A conduit puller for power construction according to claim 3, characterized in that: Friction protrusions (925) are evenly distributed on the outer circumferential walls of the two push wheels (923). A retaining ring (926) is connected to the left end of the front push wheel (923) and the right end of the rear push wheel (923). An L-shaped seat (907) is connected to the bottom wall of the lead wire housing (9). A rope hole (971) is opened on the horizontal part of the L-shaped seat (907). The traction cable (7) passes through the rope hole (971).

7. A conduit puller for power construction according to claim 1, characterized in that: The traction cable (7) includes a plastic cable core (701), a winding rope (702), and a wrapping layer (703) arranged sequentially from the inside to the outside. The plastic cable core (701) is made of modified high-density polyethylene material as the base material. The cross-section of the plastic cable core (701) is arranged in a star-shaped structure. The winding rope (702) is a composite bundle of para-aramid fiber and galvanized steel wire and is wound around the surface of the plastic cable core (701) at a 60-degree helical angle. The wrapping layer (703) is made of polyurethane elastomer injection molding.

Images