An electrical system wire threading device for building construction

Abstract

The present invention relates to the technical field of cable installation, and particularly relates to a wire threading device for an electrical system in building construction, including a towing rope; a connecting spring is provided at the front end of the towing rope; the rear end of the connecting spring is fixedly connected to the front end of the towing rope through a connecting component, and a towing device is provided at the front end; the towing device includes a metal column; elastic support components are provided on the side walls of both metal columns; when the metal column moves to a turning point of a pipeline, the elastic support component near the inner corner of the pipeline bend on the front metal column is suspended, and the elastic support component near the outer corner of the pipeline bend releases elastic force to push the front metal column to deflect towards the bent pipeline, guiding the metal column to move into the bent pipeline, avoiding the metal column from getting stuck when bending at the pipeline bend, and improving the efficiency of wire threading.

Description

Technical Field

[0001] The present invention relates to the technical field of cable installation, and in particular to an electrical system threading device for building construction. Background Art

[0002] During construction, since wire conduits are often buried directly inside concrete, they are long and have many bends. To facilitate the threading of wires, a wire threader is preferred. Some existing wire threaders include a wire rope with a metal post fixed to one end for traction. When installing wires in a conduit, the post is first inserted into the conduit at one end. The wire rope is then pushed to move the post within the conduit until it protrudes from the other end. One end of the cable is then secured to the post with a tie coil. The operator then pulls back on the wire rope to pull the cable into the conduit. A tie coil is a thin, ring-shaped loop of wire rope. The tie coil is pulled into an elliptical shape, with one end passing through a hole in the post and the other end inserted into the loop that has already passed through the post. The tie coil and post are then secured by a firm pull. The cable and tie coil are then secured by wrapping and bundling.

[0003] To reduce resistance between the metal post and the inner wall of the conduit, a roller is typically mounted on the end of the post. As the post moves within the conduit, rolling friction occurs between the roller and the conduit's inner wall. Because the metal post's diameter is smaller than the conduit's, it can easily wobble within the conduit. Consequently, when the threader's post curves around a bend in the conduit, it can become stuck as the conduit changes direction, affecting threading efficiency. Summary of the Invention

[0004] The present invention provides an electrical system wire threading device for building construction to solve the above problems.

[0005] The present invention provides an electrical system threading device for construction, which adopts the following technical solution: an electrical system threading device for construction, comprising a traction rope; the traction rope is arranged front and back; a connecting spring is provided at the front end of the traction rope; the connecting spring and the traction rope are coaxial; the rear end of the connecting spring is fixedly connected to the front end of the traction rope through a connecting assembly, and a traction device is provided at the front end.

[0006] The traction device includes a metal column; there are two metal columns; the two metal columns are distributed front and back; the metal columns are cylinders arranged front and back of the axis; the metal columns and the connecting springs are coaxial; the rear metal column and the connecting spring are rotationally connected through a rotating component; the rear end of the front metal column and the front end of the rear metal column are ball-hinged; and elastic support components are provided on the side walls of the two metal columns.

[0007] There are multiple elastic support components on each metal column; the multiple elastic support components are circumferentially distributed along the metal column; the multiple elastic support components elastically support the metal column in the wire tube against the elastic force and keep the metal column out of contact with the inner wall of the wire tube; when the metal column moves to the turning point of the wire tube, the elastic support components near the inner corner of the wire tube bend on the front metal column are suspended, and the elastic support components near the outer corner of the wire tube bend release the elastic force to push the front metal column to deflect towards the bent wire tube, guiding the metal column to move into the bent wire tube, avoiding jamming of the metal column when passing through the bend of the wire tube, and improving the threading efficiency. The elastic support component includes a support rod; the projection of the axis of the support rod on the vertical plane perpendicular to the axis of the metal column is arranged along the radial direction of the metal column; the projection of the axis of the support rod on the vertical plane parallel to the axis of the metal column is inclined with respect to the vertical direction, and the end of the support rod close to the axis of the metal column is in front of the end of the support rod far from the axis of the metal column; the end of the support rod close to the axis of the metal column is hinged to the side wall of the metal column through a hinge structure; an elastic structure is provided between the support rod and the metal column; the elastic structure is used to make the end of the support rod far from the axis of the metal column abut against the inner wall of the wire tube. The lengths of the multiple support rods of the same elastic support component are different, and the center of the arc where the ends of the multiple support rods far from the axis of the metal column are located is eccentrically arranged with respect to the metal column, so that after the metal column enters the wire tube, it rotates eccentrically around the axis of the wire tube while advancing. During the process of the metal column advancing spirally in the wire tube, when encountering an obstacle, the metal column deflects to avoid the obstacle encountered in the wire tube. At the same time, when the front metal column passes through the bend, the spiral advancing mode of the metal column in the wire tube increases the turning amplitude of the front metal column, which is beneficial to the metal column passing through the bend of the wire tube and improves the threading effect.

[0008] Further, the hinge structure includes ear plates and a hinge shaft; there are two ear plates symmetrically; the ear plates are fixed on the side wall of the metal column; hinge holes are provided on the ear plates; the axis of the hinge hole is tangent to the side wall of the metal column; the hinge shaft is arranged at the end of the support rod close to the axis of the metal column; the hinge shaft and the hinge hole are coaxial and are in rotational fit. The hinge structure and the elastic structure cooperate to make the support rod abut against the inner walls of wire tubes with different diameters.

[0009] Further, there are two hinge shafts symmetrically; the two hinge shafts are coaxially arranged; a mounting spring is fixedly connected between the two hinge shafts; the hinge shaft and the support rod are in sliding fit. After the metal column is passed through from one end of the wire tube to the other end, the two hinge shafts are squeezed to compress the mounting spring, so that the hinge shaft disengages from the hinge hole and the support rod is removed from the metal column.

[0010] Further, the included angle between the axis of the hinge hole and the generatrix of the metal column is an acute angle. During the movement of the metal column in the wire tube, the support rod provides an oblique thrust to the metal column, so that the metal column rotates while advancing in the wire tube, which is beneficial to avoiding the obstacles encountered in the wire tube.

[0011] Further, the elastic structure includes a support spring; connection columns are fixed to both ends of the support spring; the connection column on one end of the support spring is inserted into the side wall of the metal column, and the connection column on the other end of the support spring is inserted into the support rod. When it is necessary to remove the support rod from the metal column, the connection column is pulled out from the metal column and the support rod, and the support spring is removed.

[0012] Further, the ends of the two metal columns close to each other are both arc-shaped. It is used to bind and clamp the coil bundle between the two metal columns.

[0013] Further, a pulley is rotatably installed at the front end of the front metal column.

[0014] Further, the connection component includes a connection cylinder; one end of the connection cylinder is fixedly connected to the traction rope, and the other end is fixedly connected to the connection spring; the rotation component includes a rotation column; one end of the rotation column is fixedly connected to the connection spring, and the other end is rotatably matched with the rear metal column.

[0015] The beneficial effects of the present invention are as follows: 1. When the metal column moves to the turning point of the wire pipe, the elastic support components on the front metal column near the inner corner of the bend of the wire pipe are suspended, and the elastic support components near the outer corner of the bend of the wire pipe release elastic force to push the front metal column to deflect towards the bent wire pipe, guiding the metal column to move into the bent wire pipe, avoiding the metal column from getting stuck when turning at the bend of the wire pipe, and improving the wire threading efficiency.

[0016] 2. Multiple elastic support components elastically support the metal column in the wire pipe against the elastic force and keep the metal column out of contact with the inner wall of the wire pipe, avoiding the metal column from shaking back and forth in the wire pipe and hitting the inner wall of the wire pipe, and reducing the damage to the inner wall of the wire pipe.

[0017] 3. After the metal column enters the wire pipe, it eccentrically rotates around the axis of the wire pipe while moving forward, so that the metal column advances in a spiral shape in the wire pipe. During the process of the metal column advancing in a spiral shape in the wire pipe, when encountering an obstacle, the metal column deflects to avoid the obstacle encountered in the wire pipe. At the same time, when the front metal column passes through the bend, the spiral advancing mode of the metal column in the wire pipe increases the turning amplitude of the front metal column, which is beneficial to the metal column passing through the bend of the wire pipe and improves the wire threading effect. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1Schematic diagram of the structure of an embodiment of a wire threading device for an electrical system in building construction according to the present invention;

[0020] Figure 2 is Figure 1 the enlarged view of part A in;

[0021] Figure 3 Front view of an embodiment of a wire threading device for an electrical system in building construction according to the present invention;

[0022] Figure 4 is Figure 3 the cross-sectional view taken along line B-B in;

[0023] Figure 5 is Figure 4 the enlarged view of part C in;

[0024] Figure 6 Schematic diagram of the support rod and the support spring of an embodiment of a wire threading device for an electrical system in building construction according to the present invention;

[0025] Figure 7 Cross-sectional view of the support rod of an embodiment of a wire threading device for an electrical system in building construction according to the present invention;

[0026] Figure 8 is Figure 7 the enlarged view of part D in;

[0027] Figure 9 State diagram when the metal column in an embodiment of a wire threading device for an electrical system in building construction according to the present invention moves to the bent part of the wire pipe;

[0028] Figure 10 State diagram when the metal column in an embodiment of a wire threading device for an electrical system in building construction according to the present invention moves to the bent part of the wire pipe and deflects.

[0029] In the figure: 100, wire pipe; 200, towing rope; 300, connecting spring; 400, metal column; 410, pulley; 500, support rod; 510, hinge shaft; 511, mounting spring; 520, ear plate; 530, support spring; 531, connecting column. Detailed implementation manners

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] An embodiment of an electrical system wire threading device for building construction according to the present invention is as follows Figures 1 to 10 shown, including a traction rope 200; the traction rope 200 is arranged front and back; the traction rope 200 is a steel wire rope. A connecting spring 300 is provided at the front end of the traction rope 200; the connecting spring 300 and the traction rope 200 are coaxial; the rear end of the connecting spring 300 is fixedly connected to the front end of the traction rope 200 through a connecting component, and a traction device is provided at the front end. The connecting component includes a connecting cylinder; one end of the connecting cylinder is fixedly connected to the traction rope 200, and the other end is fixedly connected to the connecting spring 300.

[0032] The traction device includes metal columns 400; there are two metal columns 400; the two metal columns 400 are distributed front and back; a pulley 410 is rotatably installed at the front end of the front metal column 400. One end of each of the two metal columns 400 close to each other is arc-shaped. It is used to bind and clamp the bundle coil between the two metal columns 400. The metal column 400 is a cylinder with its axis arranged front and back; the metal column 400 and the connecting spring 300 are coaxial; the rear metal column 400 and the connecting spring 300 are rotatably connected through a rotating component; the rear end of the front metal column 400 and the front end of the rear metal column 400 are ball-jointed; elastic support components are provided on the side walls of the two metal columns 400. The rotating component includes a rotating column; one end of the rotating column is fixedly connected to the connecting spring 300, and the other end is rotatably matched with the rear metal column 400.

[0033] There are multiple elastic support components on each metal column 400; multiple elastic support components are circumferentially distributed along the metal column 400; the multiple elastic support components elastically support the metal column 400 in the wire pipe 100 against the elastic force and keep the metal column 400 out of contact with the inner wall of the wire pipe 100; when the metal column 400 moves to the turning point of the wire pipe 100, the elastic support component near the inner corner of the bend of the wire pipe 100 on the front metal column 400 is suspended, and the elastic support component near the outer corner of the bend of the wire pipe 100 releases the elastic force to push the front metal column 400 to deflect towards the bent wire pipe 100, guiding the metal column 400 to move into the bent wire pipe 100, avoiding the metal column 400 from getting stuck when passing through the bend of the wire pipe 100 and improving the wire threading efficiency.

[0034] In this embodiment, the elastic support assembly includes a support rod 500; the projection of the axis of the support rod 500 on the vertical plane perpendicular to the axis of the metal column 400 is arranged along the radial direction of the metal column 400; the projection of the axis of the support rod 500 on the vertical plane parallel to the axis of the metal column 400 is inclined with respect to the vertical direction, and the end of the support rod 500 close to the axis of the metal column 400 is in front of the end of the support rod 500 far from the axis of the metal column 400; the end of the support rod 500 close to the axis of the metal column 400 is hinged to the side wall of the metal column 400 through a hinge structure. The lengths of the multiple support rods 500 of the same elastic support assembly are different, and the center of the arc where the ends of the multiple support rods 500 far from the axis of the metal column 400 are located is eccentrically arranged with respect to the metal column 400, so that after the metal column 400 enters the wire tube 100, it rotates eccentrically around the axis of the wire tube 100 while advancing. During the process of the metal column 400 advancing spirally in the wire tube 100, when encountering an obstacle, the metal column 400 deflects to avoid the obstacle encountered in the wire tube 100. At the same time, when the metal column 400 in the front passes through a bent portion, the way the metal column 400 advances spirally in the wire tube 100 increases the turning amplitude of the metal column 400 in the front, which is beneficial for the metal column 400 to pass through the bent portion of the wire tube 100 and improves the wire threading effect.

[0035] The hinge structure includes ear plates 520 and a hinge shaft 510; two ear plates 520 are symmetrically provided; the ear plates 520 are fixed on the side wall of the metal column 400; hinge holes are provided on the ear plates 520; the axis of the hinge hole is tangent to the side wall of the metal column 400; the hinge shaft 510 is arranged at the end of the support rod 500 close to the axis of the metal column 400; the hinge shaft 510 is coaxial with the hinge hole and is in rotational fit. The hinge structure and the elastic structure cooperate to make the support rod 500 abut against the inner wall of the wire tube 100 with different diameters. Two hinge shafts 510 are symmetrically provided; the two hinge shafts 510 are coaxially arranged; an installation spring 511 is fixedly connected between the two hinge shafts 510; the hinge shaft 510 is in sliding fit with the support rod 500. After the metal column 400 is passed through from one end of the wire tube 100 to the other end, the two hinge shafts 510 are squeezed to compress the installation spring 511, so that the hinge shaft 510 disengages from the hinge hole and the support rod 500 is detached from the metal column 400. The included angle between the axis of the hinge hole and the generatrix of the metal column 400 is an acute angle. During the movement of the metal column 400 in the wire tube 100, the support rod 500 provides an oblique thrust for the metal column 400, so that the metal column 400 rotates while advancing in the wire tube 100, which is beneficial for avoiding the obstacles encountered in the wire tube 100.

[0036] An elastic structure is installed between the support rod 500 and the metal column 400. This elastic structure is used to force the end of the support rod 500, which is away from the axis of the metal column 400, to abut against the inner wall of the wire tube 100. The elastic structure includes a support spring 530. Connecting posts 531 are fixed to both ends of the support spring 530. The connecting post 531 on one end of the support spring 530 is inserted into the side wall of the metal column 400, while the connecting post 531 on the other end of the support spring 530 is inserted into the support rod 500. To remove the support rod 500 from the metal column 400, the connecting post 531 is pulled out of the metal column 400 and the support rod 500, and the support spring 530 is removed.

[0037] In conjunction with the above embodiments, the operating principle and process of the present invention are as follows: During use, a metal post 400 is inserted into the conduit 100 at one end thereof, and the metal post 400 is driven to move within the conduit 100 by pushing the traction rope 200. Multiple support rods 500 overcome the elastic force of the support spring 530 to elastically support the metal post 400 within the conduit 100, and separate the metal post 400 from the inner wall of the conduit 100. This prevents the metal post 400 from rocking back and forth within the conduit 100 and striking the inner wall of the conduit 100, thereby reducing damage to the inner wall of the conduit 100. The multiple support rods 500 are eccentrically positioned with respect to the center of the arc located at one end thereof, away from the axis of the metal post 400, and the metal post 400. This allows the metal post 400 to move eccentrically around the axis of the conduit 100 while advancing after entering the conduit 100. As the metal post 400 spirals forward within the conduit 100, if it encounters an obstacle, it deflects and avoids the obstacle. Furthermore, when the leading metal post 400 passes through a bend, the spiraling motion of the metal post 400 within the conduit 100 increases the turning range of the leading metal post 400, facilitating its passage through the bend of the conduit 100 and improving the threading efficiency. When the metal post 400 passes through an obstacle or bend, and the operator pushes the metal post 400, preventing it from rotating to avoid the obstacle (i.e., when the metal post 400 reaches the obstacle or bend and the distance it pushes the traction rope 200 is insufficient for the metal post 400 to rotate to avoid the obstacle), the operator can pull the traction rope 200 back a certain distance and then continue to push the traction rope 200, causing the metal post 400 to rotate to avoid the obstacle, thereby achieving both the bend and obstacle avoidance.

[0038] After passing the metal post 400 from one end of the conduit 100 to the other, squeeze the two hinge shafts 510, compress the mounting spring 511, and disengage the hinge shaft 510 from the hinge hole. Simultaneously, pull the connecting post 531 out of the metal post 400 and the support rod 500, remove the support spring 530, and remove the support rod 500 from the metal post 400. Then, tie the cable coil between the two metal posts 400, securely connect the cable and the coil, and pull the traction rope 200 back by dragging, so that the metal post 400 drives the cable through the coil and passes through the conduit 100.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electrical system wire threading device for building construction, characterized in that: It includes a towing rope; the towing ropes are arranged front and back; a connecting spring is provided at the front end of the towing rope; the connecting spring and the towing rope are coaxial; the rear end of the connecting spring is fixedly connected to the front end of the towing rope through a connecting component, and a towing device is provided at the front end; The towing device includes metal columns; there are two metal columns; the two metal columns are distributed front and back; the metal columns are cylinders with their axes arranged front and back; the metal columns and the connecting spring are coaxial; the rear metal column and the connecting spring are rotatably connected through a rotating component; the front end of the rear metal column and the front end of the front metal column are ball-jointed; elastic support components are provided on the side walls of both metal columns; There are multiple elastic support components on each metal column; the multiple elastic support components are distributed circumferentially along the metal column; the multiple elastic support components elastically support the metal column in the wire tube against the elastic force and keep the metal column out of contact with the inner wall of the wire tube; when the metal column moves to the turning point of the wire tube, the elastic support component near the inner corner of the wire tube bend on the front metal column is suspended, and the elastic support component near the outer corner of the wire tube bend releases the elastic force to push the front metal column to deflect towards the bent wire tube; the elastic support component includes a support rod; the projection of the axis of the support rod on the vertical plane perpendicular to the axis of the metal column is arranged along the radial direction of the metal column; the projection of the axis of the support rod on the vertical plane parallel to the axis of the metal column is inclined with respect to the vertical direction, and the end of the support rod near the axis of the metal column is in front of the end of the support rod away from the axis of the metal column; the end of the support rod near the axis of the metal column is hinged to the side wall of the metal column through a hinge structure; an elastic structure is provided between the support rod and the metal column; the elastic structure is used to make the end of the support rod away from the axis of the metal column abut against the inner wall of the wire tube; the lengths of the multiple support rods of the same elastic support component are different, and the center of the arc where the ends of the multiple support rods away from the axis of the metal column are located is eccentric with the metal column.

2. An electrical system wire threading device for building construction according to claim 1, characterized in that: The hinge structure includes ear plates and a hinge shaft; there are two symmetrically arranged ear plates; the ear plates are fixed on the side wall of the metal column; hinge holes are provided on the ear plates; the axis of the hinge hole is tangent to the side wall of the metal column; the hinge shaft is provided at the end of the support rod near the axis of the metal column; the hinge shaft and the hinge hole are coaxial and in rotational fit.

3. An electrical system wire threading device for building construction according to claim 2, characterized in that: There are two symmetrically arranged hinge shafts; the two hinge shafts are coaxially arranged; an installation spring is fixedly connected between the two hinge shafts; the hinge shaft and the support rod are in sliding fit.

4. An electrical system wire threading device for building construction according to claim 3, characterized in that: The included angle between the axis of the hinge hole and the generatrix of the metal column is an acute angle.

5. An electrical system wire threading device for building construction according to claim 4, characterized in that: The elastic structure includes a support spring; connecting columns are fixed at both ends of the support spring; the connecting column at one end of the support spring is inserted into the side wall of the metal column, and the connecting column at the other end of the support spring is inserted into the support rod.

6. The electrical system wire threading device for building construction according to claim 1, characterized in that: The ends of the two metal columns close to each other are both arc-shaped.

7. An electrical system wire threading device for building construction according to claim 1, characterized in that: A pulley is rotatably installed at the front end of the front metal column.

8. An electrical system wire threading device for building construction according to claim 1, characterized in that: The connecting component includes a connecting cylinder; one end of the connecting cylinder is fixedly connected to the towing rope, and the other end is fixedly connected to the connecting spring; the rotating component includes a rotating column; one end of the rotating column is fixedly connected to the connecting spring, and the other end is in rotational fit with the rear metal column.

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