A kind of building power line concealed wire installation threading device and installation method thereof

Abstract

The present application discloses a device for installing and threading concealed power lines of a building and an installation method thereof, which relates to the technical field of threading power lines, improves the problem of the separation of steel wires and electric wires, and comprises two connecting rings, the connecting rings are provided with mounting holes, the outer peripheral side of the connecting rings is provided with a gap for the power line or steel wire to enter the mounting hole, the outer peripheral side of the connecting rings is fixedly connected with a guide rod, the outer wall of the connecting rings is also sleeved with a closed ring for closing the gap, the closed ring and the connecting rings are detachably connected, a connecting structure is arranged between the two closed rings, the connecting structure comprises a plurality of pull ropes, one end of the pull rope is connected to a closed ring, the other end of the pull rope is connected to another closed ring, and a plurality of pull ropes are arranged along the circumference of the closed rings. In the case of separation of the steel wire and the electric wire of the present application, the two connecting rings can still maintain a connection relationship, so that the electric wire and the steel wire can indirectly form a connection relationship, so that the steel wire can still carry the electric wire through the installation tube.

Description

Technical Field

[0001] The present application relates to the technical field of power line threading, and in particular to a power line concealed wire installation threading device for a building and an installation method thereof. Background Art

[0002] When installing power lines in buildings, they are basically installed in concealed wires. From a safety perspective, if exposed wires are installed, the chance of direct contact with the human body will increase after an accident occurs, and the damage rate will be relatively large. When wires are hidden, they age more slowly.

[0003] When installing concealed wires, the installation pipe is usually pre-buried first, and then a steel wire is used to pass through the installation pipe. Then one end of the wire is tied to the steel wire, and then the steel wire is pulled back so that the steel wire can pass through the installation pipe with the wire. The end of the steel wire connected to the wire is usually wrapped in a circle to facilitate the steel wire to go along the pipe and to facilitate the wire to be tied to the steel wire.

[0004] With respect to the above-mentioned related technologies, the inventors believe that during the process of guiding the steel wire, if there are many turning points in the installation tube, the swing of the steel wire and the electric wire will be relatively large, and there is a possibility that the steel wire and the electric wire will be separated. Summary of the invention

[0005] In order to reduce the situation where the steel wire and the electric wire are completely separated when the steel wire is pulling the electric wire, the present application provides a hidden wire installation threading device for a building's power line and an installation method thereof.

[0006] In a first aspect, the present application provides a device for installing concealed wires of power lines in a building, which adopts the following technical solution:

[0007] A device for installing concealed wires of a building's power line comprises two connecting rings, each of which is provided with an installation hole for installing an electric wire or a steel wire, a notch for the electric wire or the steel wire to enter the installation hole is provided on the outer circumference of the connecting ring, a guide rod is fixedly connected to the outer circumference of the connecting ring, the guide rods are evenly spaced along the circumference of the connecting ring, a sliding portion is provided at one end of the guide rod away from the connecting ring, a closed ring for closing the notch is also sleeved on the outer wall of the connecting ring, the closed ring and the connecting ring are detachably connected, a connecting structure is provided between the two closed rings, the connecting structure comprises a plurality of pull ropes, one end of the pull rope is fixedly connected to one closed ring, the other end of the pull rope is connected to another closed ring, and a plurality of pull ropes are provided along the circumference of the closed ring; the connecting structure comprises a first connecting state in which the two connecting rings are coaxially fitted together, and a second connecting state in which the two connecting rings are away from each other.

[0008] By adopting the above technical solution, before the steel wire enters the installation tube, the two connecting rings are first installed on the steel wire and then the fixing ring is used to close the gap of the connecting ring. When the connecting ring enters the installation tube along with the steel wire, the multiple guide rods make the connecting ring in the center position of the installation tube. When the steel wire moves in the installation tube, the guide rod can guide the steel wire to a certain extent, so that the steel wire can pass through the installation tube more smoothly.

[0009] After the steel wire passes through the mounting tube, the electric wire is wound around the place where the steel wire is coiled, and then the two connecting rings are adjusted to a second connection state away from each other, and one of the connecting rings is removed from the steel wire, and then the removed connecting ring is installed on the electric wire, so that the part where the electric wire and the steel wire are connected to each other is located between the two connecting rings. When the steel wire pulls the electric wire into the mounting tube, the connecting rings away from each other can minimize the contact between the connecting part of the electric wire and the steel wire and the inner wall of the mounting tube. If the electric wire and the steel wire are separated from each other, the two connecting rings still form a whole through the pull rope, so the steel wire can still pull the electric wire through the mounting tube, and the guide rod can also keep guiding the electric wire and the steel wire, so that the electric wire and the steel wire can pass through the mounting tube smoothly.

[0010] Optionally, a guide block is fixedly connected to the inner wall of the closed ring, a guide groove for the guide block to slide into is provided on the outer wall of the connecting ring, a plurality of guide blocks are arranged at intervals along the circumference of the closed ring, and the guide grooves correspond to the guide blocks one by one.

[0011] By adopting the above technical solution, the cooperation between the guide block and the guide groove can guide the sliding of the closed ring on the connecting ring.

[0012] Optionally, a receiving groove for accommodating a pull rope is provided on the closed ring, and the receiving groove is inclined along the axial direction of the closed ring. Both ends of the pull rope are connected to sliders, which are slidably installed in the receiving groove. A limiting block is provided at one end of the receiving groove. When the two connecting rings are coaxially fitted together, the slider extends out of the receiving groove and forms abutment with the end face of the closed ring.

[0013] By adopting the above technical solution, when the two connecting rings are coaxially attached together, the receiving groove can be used to accommodate part of the draw cord, so that the draw cord can be accommodated.

[0014] Optionally, the connection structure also includes a positioning bar, which is installed on the pull rope, and the two ends of the positioning bar are respectively fixedly connected to the two sliders of the pull rope. The positioning bar extends along the length direction of the pull rope, and the positioning bar is made of flexible material.

[0015] By adopting the above technical scheme, flexibility refers to the property that an object that is deformed by force cannot return to its original shape after the force is removed, rather than keeping the deformed shape unchanged. When the two connecting rings are coaxially fitted together in the first connection state, because the positioning strip is made of flexible material, in the absence of external force pushing the pull rope, the distribution direction of the pull rope between the two connecting rings and the direction in which the two connecting rings move away from each other form a triangular structure, so the two connecting rings are not easy to move away from each other; only when an external force pushes the slider to slide in the accommodating groove while moving the connecting rings away from each other, can the two connecting rings gradually separate to form the second connection state. Also because of the flexibility of the positioning strip, the positioning strip can be bent to make the slider abut against the end face of the closed ring, so that the two ends of the pull rope are fixed and the two connecting rings can be further fixed.

[0016] Optionally, a clamping block is fixedly connected to the outer peripheral side of the closed ring, and a clamping groove for clamping with the guide rod is opened on the clamping block. The notch of the clamping groove is smaller than the outer diameter of the guide rod, and the clamping block corresponds to the guide rod one by one.

[0017] By adopting the above technical solution, the closed ring can form a fixed connection relationship with the guide rod through the clamping block, and the clamping block can also protect the connection between the guide rod and the connecting ring.

[0018] Optionally, the connecting ring is supported by a rubber material, and the closing ring is supported by a rigid material.

[0019] By adopting the above technical solution, the connection between the closed ring and the guide rod can also keep the connecting ring and the closed ring coaxially arranged, so that a plurality of guide rods can be radially distributed around the center of the connecting ring.

[0020] Optionally, the guide rod is a telescopic rod, the guide rod includes an outer rod and an inner rod, the inner rod and the outer rod are threadedly connected, and the outer rod is fixedly connected to the connecting ring.

[0021] By adopting the above technical solution, the retractable guide rod can better adapt to installation pipes with different diameters.

[0022] In a second aspect, the present application provides a method for installing concealed wires of power lines in a building, which adopts the following technical solution:

[0023] A method for installing concealed power lines in a building, using the above-mentioned threading device, installing a steel wire on two connecting rings at the same time, installing a closed ring on the connecting ring, using a connecting structure to coaxially fit the two connecting rings together, first passing the steel wire through a mounting tube, and after the steel wire passes through the mounting tube, removing one of the connecting rings from the steel wire, and installing the connecting ring on the electric wire, and then reinstalling the closed ring on the connecting ring, the electric wire and the steel wire are connected to each other and the connecting part is located between the two connecting rings.

[0024] By adopting the above technical solution, when the steel wire passes through the installation tube alone, the guide rods of the two connecting rings can guide the steel wire. When the steel wire and the electric wire are connected together, the connecting part of the steel wire and the electric wire is located between the two connecting rings. The two closed rings are connected together by a pull rope. If the steel wire and the electric wire are separated in the installation tube, the steel wire and the electric wire are not easy to separate from the connecting ring. The steel wire and the electric wire can be indirectly connected together through the connecting structure, so that the steel wire can also guide the electric wire.

[0025] In summary, the present application includes at least one of the following beneficial effects:

[0026] 1. When the two connecting rings are installed on the steel wire at the same time, the steel wire can pass through the installation rod smoothly. When the two connecting rings are installed on the steel wire and the electric wire respectively, the connection between the steel wire and the electric wire is located between the two connecting rings. When the connection between the steel wire and the electric wire and the two connecting rings pass through the turning point of the installation tube, a certain degree of bending can be formed, so that the steel wire and the electric wire can pass through the installation tube smoothly;

[0027] 2. If the steel wire and the electric wire are separated, when both the steel wire and the electric wire are not easy to separate from the connecting ring, the two connecting rings can still maintain a connection relationship, so that the electric wire and the steel wire can indirectly form a connection relationship, so that the steel wire can still carry the electric wire through the installation tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 is a cross-sectional view of a pull cord and a receiving groove according to an embodiment of the present application;

[0030] Figure 3 yes Figure 2 A magnified schematic diagram of point A;

[0031] Figure 4 This is a schematic diagram of the structure of an embodiment of the present application showing that when two connecting rings are coaxially attached, the slider is located outside the receiving groove;

[0032] Figure 5 is a schematic diagram showing an embodiment of the present application in which a pull cord is accommodated in two accommodating grooves;

[0033] Figure 6 yes Figure 5 An enlarged schematic diagram of point B.

[0034] Explanation of the accompanying drawings: 1. connecting ring; 11. mounting hole; 12. notch; 13. guide groove; 2. closing ring; 21. accommodating groove; 22. limiting block; 23. clamping block; 3. guide rod; 31. outer rod; 32. inner rod; 4. pull rope; 41. slider; 5. guide block; 6. ball bearing; 7. electric wire; 8. steel wire. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The present application embodiment discloses a concealed wire installation and threading device for power lines in a building. Figure 1 A power line concealed wire installation threading device for a building includes two connecting rings 1. The connecting rings 1 are provided with a mounting hole 11 for clamping an electric wire 7 or a steel wire 8. The central axis of the mounting hole 11 and the central axis of the connecting ring 1 coincide with each other. A notch 12 for the electric wire 7 or the steel wire 8 to enter the mounting hole 11 is provided on the outer peripheral side of the connecting ring 1. The electric wire 7 or the steel wire 8 can enter the mounting hole 11 along the radial direction of the connecting ring 1 through the notch 12. A closed ring 2 for closing the notch 12 is installed on the connecting ring 1. The closed ring 2 is detachably installed on the connecting ring 1. A guide rod 3 is also fixedly connected to the outer wall of the connecting ring 1. Three guide rods 3 are evenly spaced along the circumference of the connecting ring 1. The closed ring 2 and the guide rod 3 are detachably connected. The connecting ring 1 is positioned by the guide rod 3 so that when the connecting ring 1 slides in the installation tube, the connecting ring 1 can basically maintain a coaxial state with the installation tube, and the friction between the connecting ring 1 and the installation tube can be reduced, so that the connecting ring 1 can smoothly pass through the installation tube with the steel wire 8 or the electric wire 7.

[0037] A connecting structure is provided between the two closed rings 2, and the connecting structure can make the two connecting rings 1 form a whole. When the two connecting rings 1 are respectively installed on the steel wire 8 or the electric wire 7, if the electric wire 7 and the steel wire 8 are separated from each other, the ends of the steel wire 8 and the electric wire 7 are bent, so it is not easy for the steel wire 8 and the electric wire 7 to pass through the installation hole 11 and separate from the connecting ring 1. The steel wire 8 and the electric wire 7 can also form a connection relationship intermittently due to the connecting structure, so that the steel wire 8 can still guide the electric wire 7 to pass through the installation tube.

[0038] Reference Figure 1 and Figure 2 , the connection structure includes a plurality of pull ropes 4, and the embodiment of the present application is provided with three pull ropes 4. The plurality of pull ropes 4 are distributed along the circumference of the closed ring 2. Slide blocks 41 are respectively connected to both ends of the pull rope 4, one end of the pull rope 4 is slidably connected to one of the closed rings 2, and the other end of the pull rope 4 is slidably connected to the other closed ring 2. A receiving groove 21 for accommodating the pull rope 4 and for the slider 41 to slide is provided on the end surface of the closed ring 2, and the slider 41 is slidably installed in the receiving groove 21. The receiving groove 21 is inclined along the axial direction of the closed ring 2, and the receiving groove 21 passes through from one axial end surface of the closed ring 2 to the other axial end surface of the closed ring 2. The receiving groove 21 is a straight groove structure.

[0039] Reference Figure 2 and Figure 3, the inner wall of one end of the receiving groove 21 is fixedly connected to the limit block 22, the limit blocks 22 of the two receiving grooves 21 are close to each other, and the slider 41 stops sliding when it slides to abut against the limit block 22, and the limit block 22 intercepts the slider 41. When the two sliders 41 on a pull rope 4 abut against the limit blocks 22 respectively, the length direction of the pull rope 4 is the same as the axial direction of the closed loop 2, and the distance between the two connecting rings 1 is the largest. When one end of the electric wire 7 is tied to the steel wire 8, the two connecting rings 1 are respectively installed on the electric wire 7 and the steel wire 8, the two connecting rings 1 are away from each other, and the pull rope 4 between the two connecting rings 1 is in a relaxed state.

[0040] Reference Figure 3 and Figure 4 When the sliders 41 at both ends of the pull rope 4 gradually move away from the limit block 22 along the accommodating groove 21 , the two connecting rings 1 also gradually approach each other. When the two connecting rings 1 are coaxially fitted together, the sliders 41 slide out of the accommodating groove 21 .

[0041] Reference Figure 5 and Figure 6 The connection structure also includes a positioning bar (not shown in the figure), which is fixedly mounted on the pull rope 4. The length direction of the positioning bar extends along the length direction of the pull rope 4, and the two ends of the positioning bar are fixedly connected to the slider 41 respectively. The positioning bar is made of a flexible material, such as iron wire. Flexibility refers to the property that an object that is deformed by force cannot restore its original shape after the force is removed, rather than keeping the deformed shape unchanged. When the slider 41 extends out of the accommodating groove 21, bending the positioning bar can make the slider 41 abut against the end face of the closed ring 2, so that the two connecting rings 1 maintain the first connection state.

[0042] Reference Figure 6 , when the slider 41 abuts against the end face of the closed ring 2, the pull rope 4 is also accommodated in the accommodating groove 21. The pull rope 4 is bent into two ends and is respectively located in the two closed rings 2. The direction in which the two connecting rings 1 move away from each other is the axial direction of the connecting ring 1. The direction in which the two connecting rings 1 move away from each other and the distribution direction of the two ends of the pull rope 4 form a triangular structure, so that the two connecting rings 1 will not be easily separated when they are coaxially fitted together. Therefore, when the two connecting rings 1 are fitted and installed on the steel wire 8, the positioning effect of the guide rod 3 on the steel wire 8 can be further improved. When the two connecting rings 1 need to move away from each other, it is necessary to apply external force to the slider 41 and the connecting ring 1 at the same time, so that the connecting ring 1 moves in the direction away from the other connecting ring 1, and the slider 41 approaches the limit block 22 along the accommodating groove 21, so that the two connecting rings 1 move away from each other. When the slider 41 abuts against the limit block 22, the two connecting rings 1 form a second connection state. A pull ring is installed on the slider 41. When the slider 41 is still sliding in the receiving groove 21, in order to be able to drive the slider 41 out of the receiving groove 21 more quickly, a wire can be extended into the receiving groove 21 and hooked into the pull ring, so that people can better apply force to the slider 41.

[0043] Reference Figure 1 The inner wall of the closed ring 2 is fixedly connected with a guide block 5, and the outer wall of the connecting ring 1 is provided with a guide groove 13 for the guide block 5 to slide into. A plurality of guide blocks 5 are arranged at intervals along the circumference of the closed ring 2, and the number of guide grooves 13 and guide blocks 5 correspond to each other. The closed ring 2 can accurately slide into the connecting ring 1 through the guide block 5. The closed ring 2 also increases the thickness of the closed ring 2 due to the guide block 5. The receiving groove 21 is located on the closed ring 2 near the guide block 5.

[0044] Reference Figure 1 The outer peripheral side of the closed ring 2 is fixedly connected with a clamping block 23, and the clamping block 23 corresponds to the guide rod 3. The clamping block 23 is provided with a clamping groove for clamping with the guide rod 3, and the notch of the clamping groove is smaller than the outer diameter of the guide rod 3, so that when the guide rod 3 is clamped in the clamping groove, the guide rod 3 is not easy to leave the clamping block 23. The clamping block 23 is made of plastic with a certain deformation ability, so that the guide rod 3 can be clamped into or leave the clamping block 23.

[0045] Reference Figure 1 The guide rod is a telescopic rod, and includes an outer rod 31 and an inner rod 32. The outer rod 31 is fixedly mounted on the outer wall of the connecting ring 1. The inner rod 32 is threadedly connected to the outer rod 31, and the length of the guide rod can be adjusted by rotating the inner rod 32. A sliding portion is provided at a section of the guide rod away from the connecting ring 1, and the sliding portion is a ball 6, which is rollingly mounted on the inner rod 32. The guide rod can reduce the friction force when the guide rod moves in the mounting tube through the sliding portion.

[0046] It should be added that the inner wall of the mounting hole 11 of the connecting ring 1 can be plugged with a sponge layer so that the mounting hole 11 of the connecting ring 1 can be clamped with wires 7 or steel wires 8 of different inner diameters. The connecting ring 1 is made of rubber material so that the notch 12 of the connecting ring 1 can be deformed appropriately to adapt to the outer diameter of the steel wire 8 or the wire 7. The closed ring 2 is a rigid structure, and the closed ring 2 and the guide rod 3 are detachably connected, so that the closed ring 2 can also play a shaping role on the connecting ring 1, so that the connecting ring 1 remains in its original shape after the wire 7 or steel wire 8 is installed in the mounting hole 11.

[0047] The implementation principle of the hidden wire installation threading device for power lines of a building in the embodiment of the present application is as follows:

[0048] The two connecting rings 1 are installed on the steel wire 8 and then the notch 12 of the connecting ring 1 is closed with a fixing ring. When the connecting ring 1 enters the installation tube along with the steel wire 8, the multiple guide rods 3 make the connecting ring 1 in the center position of the installation tube. When the steel wire 8 moves in the installation tube, the guide rods 3 can play a certain guiding role on the steel wire 8, so that the steel wire 8 can pass through the installation tube more smoothly; after the steel wire 8 passes through the installation tube, the electric wire 7 is wound on the place where the steel wire 8 is coiled, and then the two connecting rings 1 are adjusted to a second connection state away from each other, and one of the connecting rings 1 is removed from the steel wire 8, and then the removed connecting ring 1 is installed on On the electric wire 7, the part that connects the electric wire 7 and the steel wire 8 is located between the two connecting rings 1. When the steel wire 8 pulls the electric wire 7 into the installation tube, the connecting rings 1 that are far away from each other can minimize the contact between the connecting part of the electric wire 7 and the steel wire 8 and the inner wall of the installation tube. If the electric wire 7 and the steel wire 8 are separated from each other, the electric wire 7 and the steel wire 8 are not easy to leave the connecting ring 1 because of the coiled parts at the ends. The two connecting rings 1 are still formed as a whole by the pull rope 4, so the steel wire 8 can still pull the electric wire 7 through the installation tube, and the guide rod can also keep guiding the electric wire 7 and the steel wire 8, so that the electric wire 7 and the steel wire 8 can pass through the installation tube smoothly.

[0049] The embodiment of the present application also discloses a method for installing and threading concealed power lines in a building.

[0050] A method for installing concealed power lines in a building, using the above-mentioned threading device, installing a steel wire 8 on two connecting rings 1 at the same time, and installing a closed ring 2 on the connecting ring 1, using a connecting structure to coaxially fit the two connecting rings 1 together, first passing the steel wire 8 through a mounting tube, and after the steel wire 8 passes through the mounting tube, removing one of the connecting rings 1 from the steel wire 8, and installing the connecting ring 1 on the electric wire 7, and then reinstalling the closed ring 2 on the connecting ring 1, the electric wire 7 and the steel wire 8 are connected to each other and the connecting portion is located between the two connecting rings 1, when the steel wire 8 pulls the electric wire 7 to move in the mounting tube, the steel wire 8 can directly apply force to the electric wire 7, and the steel wire 8 can also apply force to the electric wire 7 through the connection relationship between the two connecting rings 1, so that the electric wire 7 in the mounting tube can always be pulled by the steel wire 8.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for installing concealed wires of power lines in buildings. Features: The invention comprises two connecting rings (1), each of which has a mounting hole (11) for mounting an electric wire (7) or a steel wire (8), and a notch (12) for allowing the electric wire (7) or the steel wire (8) to enter the mounting hole (11). A guide rod (3) is fixedly connected to the outer circumference of the connecting ring (1), and the guide rods (3) are evenly spaced along the circumference of the connecting ring (1). A sliding portion is provided at one end of the guide rod (3) away from the connecting ring (1), and a sleeve for closing the notch (12) is also provided on the outer wall of the connecting ring (1). 12), the closed ring (2) and the connecting ring (1) are detachably connected, a connecting structure is provided between the two closed rings (2), the connecting structure comprises a plurality of drawstrings (4), one end of the drawstring (4) is connected to one closed ring (2), the other end of the drawstring (4) is connected to the other closed ring (2), and a plurality of drawstrings (4) are provided along the circumference of the closed ring (2); the connecting structure comprises a first connecting state in which the two connecting rings (1) are coaxially fitted together, and a second connecting state in which the two connecting rings (1) are separated from each other; The inner wall of the closed ring (2) is fixedly connected with a guide block (5); the outer wall of the connecting ring (1) is provided with a guide groove (13) for the guide block (5) to slide into; a plurality of guide blocks (5) are arranged at intervals along the circumference of the closed ring (2); and the guide grooves (13) correspond to the guide blocks (5) one by one; The closed ring (2) is provided with a receiving groove (21) for receiving the pull rope (4), the receiving groove (21) being arranged obliquely along the axial direction of the closed ring (2), the two ends of the pull rope (4) being connected with sliders (41), the sliders (41) being slidably installed in the receiving groove (21), a limiting block (22) being arranged at one end of the receiving groove (21), when the two connecting rings (1) are coaxially fitted together, the slider (41) extends out of the receiving groove (21) and forms an abutting relationship with the end surface of the closed ring (2); The connection structure also includes a positioning bar, which is mounted on the pull rope (4), and the two ends of the positioning bar are respectively fixedly connected to the two sliders (41) of the pull rope (4), and the positioning bar extends along the length direction of the pull rope (4), and the positioning bar is made of a flexible material; A clamping block (23) is fixedly connected to the outer peripheral side of the closed ring (2), and a clamping groove for clamping with the guide rod (3) is provided on the clamping block (23), the notch of the clamping groove is smaller than the outer diameter of the guide rod (3), and the clamping block (23) corresponds to the guide rod (3) one by one.

2. A concealed wire installation threading device for power lines in a building according to claim 1, Features: The connecting ring (1) is supported by a rubber material, and the closing ring (2) is supported by a rigid material.

3. A concealed wire installation threading device for power lines in a building according to claim 1, Features: The guide rod is a telescopic rod, comprising an outer rod (31) and an inner rod (32), the inner rod (32) and the outer rod (31) are threadedly connected, and the outer rod (31) is fixedly connected to the connecting ring (1).

4. A method for installing concealed wires of power lines in buildings. Features: According to the concealed wire installation threading device for power lines in buildings as described in any one of claims 1 to 3, the steel wire (8) is installed on the two connecting rings (1) at the same time, the closed ring (2) is installed on the connecting ring (1), the two connecting rings (1) are coaxially fitted together using a connecting structure, the steel wire (8) is first passed through the installation tube, and after the steel wire (8) passes through the installation tube, one of the connecting rings (1) is removed from the steel wire (8), and the connecting ring (1) is installed on the electric wire (7), and then the closed ring (2) is reinstalled on the connecting ring (1), the electric wire (7) and the steel wire (8) are connected to each other and the connecting part is located between the two connecting rings (1).

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