In-wall threading device

Abstract

The invention relates to the technical field of constructional engineering, and provides an in-wall threading device which adopts a tractor as a power source, a motor in the tractor is powered by a battery, and the motor drives a propeller to rotate to generate forward thrust. In order to cope with pipeline bending, a first shell comprising a motor is connected with a second shell through a universal joint, and it is ensured that the tractor can flexibly adapt to various complex pipeline structures. And the second shell, the traction rope, the connector and the electric wire are connected in sequence, so that a continuous pulling system from the tractor to the electric wire is formed. The first shell and the second shell are each provided with a plurality of pulley mechanisms, the pulley mechanisms can provide stable supporting and guiding in the pipeline through the combined design of the supporting pieces, the swing pieces and the pulleys, fine adjustment of the distance between the pulleys and the shells can be achieved by adjusting the tightness degree of bolts on the swing pieces, and therefore the pipeline connector is suitable for pipelines with different diameters. High-efficiency and smooth wire threading work in a pipeline in a wall is realized.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to an in-wall wiring device. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] In the installation process of modern building electrical systems, when the house is still in a rough state, the laying of wires faces a series of challenges. In traditional practices, the lines are directly installed in an exposed manner, which not only affects the indoor aesthetics, but is also easily damaged by external environmental factors, reducing the reliability and safety of power supply. To solve this problem, the current technical means of pre-buried pipes inside the wall are generally adopted to provide a protective channel for the wires to ensure that the power transmission process is both stable and safe.

[0004] However, in actual operation, the threading operation has become a tedious and labor-intensive process. The traditional threading method relies on tying the traction rope to the steel wire, and then the construction workers carefully manipulate the steel wire to pass through the pre-buried pipe. This process is highly dependent on the personal experience and feel of the construction workers. They need to constantly adjust the strength of the pulling force and the direction of the steel wire according to their intuition until the wire threading is successfully completed. Although this method meets the construction needs to a certain extent, it is inefficient, time-consuming, and highly dependent on human resources, which significantly increases the project cost and time cost.

[0005] Therefore, there is an urgent need for an in-wall wire threading device to simplify the wire threading process, improve work efficiency, and reduce the physical exertion and skill requirements of construction workers. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of this application is to provide a wire threading device in the wall, which forms a continuous pulling system from the tractor to the wire by connecting a tractor, a traction rope, a connector and a wire in sequence. At the same time, a universal joint is arranged in the middle of the tractor to realize the turning at the bend of the pipeline, so as to realize the efficient and smooth wire threading work in the pipeline in the wall.

[0007] The purpose of this application is achieved through the following technical solutions:

[0008] The present invention provides an in-wall wire threading device, comprising: a traction vehicle, a traction rope and a connector, the traction vehicle is connected to the connector via the traction rope, and the connector is connected to the wire to be threaded;

[0009] The tractor comprises a propeller, a motor connected to the propeller, a first housing sleeved on the motor, a battery, a second housing sleeved on the battery, a universal joint and a plurality of pulley mechanisms. The propeller passes through the first housing and is fixedly connected to the motor. The motor is electrically connected to the battery. When the motor is powered on, the propeller is driven to rotate and generate thrust. The first housing is connected to the second housing through a universal joint for steering at a bend in the pipeline. One end of the second housing away from the universal joint is connected to a traction rope.

[0010] Three or more pulley mechanisms are disposed on the side walls of the first shell and the second shell, all the pulley mechanisms on the first shell are evenly distributed around the circumference of the side wall of the first shell, and all the pulley mechanisms on the second shell are evenly distributed around the circumference of the side wall of the second shell;

[0011] Each pulley mechanism includes a support member, a swing member and a pulley, one end of the support member is hinged to the first shell / second shell, and the other end of the support member is rotatably connected to the pulley; one end of the swing member is hinged to the first shell / second shell, and the hinged connection is fixed by a first bolt and a nut to control the rotation angle of the swing member; a sliding member is provided on the other end of the swing member, and the sliding member is slidably connected to a slide groove on the support member; by adjusting the rotation angle of the swing member, the support member is driven to rotate to adjust the distance between the pulley and the first shell / second shell.

[0012] Furthermore, the included angle between the support member located on the first shell and the first shell is an acute angle, and the support member is inclined toward the direction of the propeller.

[0013] Furthermore, a chamfer is provided on one end of the first shell close to the propeller.

[0014] Furthermore, the sliding member is cylindrical, the sliding member is rotationally connected to the swing member, and the side wall of the sliding member is slidingly connected to the sliding groove.

[0015] Furthermore, the connector includes a connecting tube, a first pressing plate, a plurality of first constraint shafts and a plurality of first bolts. The connecting tube is detachably connected to the traction rope, each first constraint shaft passes through the connecting tube and is fixedly connected to the first pressing plate, and each first constraint shaft is slidably connected to the connecting tube; each first bolt passes through the connecting tube and abuts against the first pressing plate, and each first bolt is threadedly connected to the connecting tube; the connecting tube is used to place the conductor in the wire, and the first pressing plate is driven by rotating the first bolt to fix the conductor.

[0016] Furthermore, the connecting tube includes a main body with a C-shaped cross-section and two side plates inclined toward the inside of the connecting tube. The main body and the two side plates together form a space for placing the wire conductor. An arc is provided at the connection between the two side plates, and the ends of the two side plates away from the arc are connected to the main body.

[0017] Furthermore, the connector also includes a metal sheet, a second pressing plate, a second constraint shaft, a second bolt and an external tube detachably connected to the connecting tube, the metal sheet is fitted against the inner wall of the connecting tube, an interface is provided on the side wall of the connecting tube, the external tube is detachably connected to the interface, the second constraint shaft passes through the connecting tube and is fixedly connected to the second pressing plate, the second constraint shaft is slidably connected to the connecting tube; the second bolt passes through the connecting tube and abuts against the second pressing plate, and the second bolt is threadedly connected to the connecting tube; the external tube is used to place the conductor in the wire, and the second bolt drives the second pressing plate to fix the conductor by rotating the second bolt, and the wire passes through the interface and abuts against the metal sheet.

[0018] Furthermore, a T-shaped slot is provided on the interface, and a T-shaped protrusion adapted to the T-shaped slot is provided on the end of the external connecting tube, and the T-shaped protrusion is slidably connected to the T-shaped slot.

[0019] Furthermore, the connector also includes a sealing plate, on which a T-shaped protrusion adapted to the T-shaped slot is provided, the T-shaped protrusion is slidably connected to the T-shaped slot, and the sealing plate is used to close the interface when no other external wires are needed.

[0020] Furthermore, a hook is provided on one end of the second housing away from the universal joint, and the hook is connected to the traction rope.

[0021] In summary, the technical solution of the embodiment of the present application has at least the following advantages and beneficial effects:

[0022] The wall threading device proposed by the present invention uses a tractor as a power source, and the motor is powered by a battery. The motor drives the propeller to rotate and generates forward thrust. The first shell wraps the motor to protect it from interference from the external environment. In order to cope with the bending of the pipeline, the first shell is connected to the second shell through a universal joint. The universal joint allows both to deflect freely in three-dimensional space, ensuring that the tractor can flexibly adapt to various complex pipeline structures. The end of the second shell away from the universal joint is connected to a traction rope, which is connected to a connector, and the connector is connected to the wire, thus forming a continuous pulling system from the tractor to the wire. In addition, multiple pulley mechanisms are installed on the first shell and the second shell. These pulley mechanisms can provide stable support and guidance in the pipeline through the combined design of support members, swing members and pulleys, and can also adjust the distance between the pulley and the shell by adjusting the tightness of the bolts on the swing member, so as to adapt to pipelines of different diameters. Efficient and smooth wire threading work in the wall pipeline is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a wire threading device in a wall provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of the tractor in the present invention;

[0025] Figure 3It is a schematic diagram of the structure of the connector in the present invention;

[0026] Figure 4 FIG. 4 is another structural schematic diagram of the connector in the present invention.

[0027] Icons: 1. Tractor; 11. Propeller; 12. First shell; 13. Second shell; 14. Universal joint; 15. Pulley mechanism; 151. Swinging member; 1511. Sliding member; 152. Support member; 1521. Slide; 153. Pulley; 2. Traction rope; 3. Pipe inside the wall; 4. Connector; 41. Connecting cylinder; 411. Main body; 412. Side plate; 413. Arc; 42. First pressing plate; 43. First constraint axis; 44. First bolt; 45. Metal sheet; 46. Interface; 461. T-slot; 47. External cylinder; 471. Second pressing plate; 472. Second constraint axis; 473. Second bolt; 5. Wires to be threaded. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Please refer to Figure 1 The embodiment of the present application provides a wire threading device in a wall, comprising a tractor 1, a traction rope 2 and a connector 4. The tractor 1 is connected to the connector 4 through the traction rope 2, and the connector 4 is connected to the wire 5 to be threaded. The tractor 1 is used to drive the traction rope 2 to move in the pipe 3 in the wall, so that the traction wire can smoothly pass through the pipe in the wall; then the traction rope 2 is pulled to pass the wire through the pipe, thereby efficiently and smoothly completing the task of threading the wire in the pipe 3 in the wall.

[0030] Specifically, the tractor 1 includes a propeller 11, a motor connected to the propeller 11, a first housing 12 mounted on the motor, a battery, a second housing 13 mounted on the battery, a universal joint 14, and a plurality of pulley mechanisms 15. The propeller 11 passes through the first housing 12 and is fixedly connected to the motor. The motor is electrically connected to the battery. After the motor is powered on, it drives the propeller 11 to rotate and generate thrust. The first housing 12 is connected to the second housing 13 through the universal joint 14, which is used for steering at the bend of the pipeline. The end of the second housing 13 away from the universal joint 14 is connected to the traction rope 2. Among them, the motor adopts a miniature design, such as a motor of model 2306. Its small size (stator diameter 23mm, stator height 6mm) ensures that the tractor 1 can easily pass through pipelines of various sizes without hindrance. After receiving the electric energy from the battery, the motor drives the propeller 11 to rotate at a high speed, generates forward thrust, and provides power for the tractor 1 to move forward. In addition, by providing a universal joint 14 between the first shell 12 and the second shell 13, the first shell 12 and the second shell 13 are allowed to deflect freely in three-dimensional space, ensuring that the tractor 1 can smoothly pass through various complex curved pipeline structures without being stuck due to steering restrictions.

[0031] At the same time, in order to improve the stability and smoothness of the tractor 1 in the pipeline, three or more pulley mechanisms 15 are installed on the side walls of the first shell 12 and the second shell 13. These pulley mechanisms 15 are evenly distributed on the side walls of the first shell 12 or the second shell 13, and are arranged around the circumference of the shell, ensuring that at any angle, at least one pulley 153 can fit closely to the inner wall of the pipeline to provide necessary support and guidance. This design effectively reduces the friction between the tractor 1 and the inner wall of the pipeline, making the travel smoother, while also protecting the inner wall of the pipeline from damage.

[0032] In addition, in order to adapt to different sizes, the present embodiment sets the distance between the pulley 153 and the housing of the tractor 1 to be adjustable. Specifically, each pulley mechanism 15 includes a support member 152, a swing member 151 and a pulley 153. One end of the support member 152 is hinged to the first housing 12 / second housing 13, and the other end of the support member 152 is rotatably connected to the pulley 153, thereby allowing the pulley 153 to swing up and down within a certain range to adapt to pipes of different diameters. One end of the swing member 151 is hinged to the first housing 12 / second housing 13 and is fixed by a first bolt 44 and a nut. By adjusting the tightness of the bolt, the rotation angle of the swing member 151 can be accurately controlled, thereby adjusting the distance between the pulley 153 and the housing. The other end of the swing member 151 is provided with a sliding member 1511, which is slidably connected to the slide groove 1521 on the support member 152. This design enables the support member 152 to adjust its position accordingly as the swing member 151 rotates, thereby achieving fine adjustment of the spacing between the pulleys 153, thereby adapting to wall pipes 3 of different sizes.

[0033] The sliding member 1511 is cylindrical, the sliding member 1511 is rotatably connected to the swing member 151, and the side wall of the sliding member 1511 is slidably connected to the slide groove 1521. A hook is provided on one end of the second housing 13 away from the universal joint 14, and the hook is connected to the traction rope 2.

[0034] Furthermore, the support member 152 is usually maintained at a vertical or nearly vertical angle with the first shell 12 to ensure that the pulley 153 can smoothly fit the inner wall of the pipe and provide the necessary support. However, in actual applications, especially when the inner diameter of the pipe is small or there is a sharp turn, this vertically designed support member 152 will increase the risk of collision between the propeller 11 and the inner wall of the pipe, resulting in interruption of the threading operation. Therefore, in this embodiment, the angle between the support member 152 located on the first shell 12 and the first shell 12 is an acute angle, and the support member 152 is inclined in the direction of the propeller 11, so that the pulley 153 remains on the periphery of the propeller 11, thereby reducing the risk of collision with the propeller 11.

[0035] Furthermore, if the end of the first housing 12 close to the propeller 11 is set to a right angle or a nearly right angle edge, this may cause turbulence in the airflow when it flows through this place, affecting the thrust efficiency of the propeller 11. Therefore, this embodiment provides a smoother transition path for the airflow by setting a smooth chamfer at the end of the first housing 12 close to the propeller 11. When the airflow flows out from the blades of the propeller 11, it can flow to the rear more smoothly along the chamfer, reducing the generation of turbulence and resistance. The thrust efficiency of the propeller 11 is improved, thereby improving the overall performance and operating stability of the tractor 1.

[0036] Furthermore, considering that after the threading operation is completed, the wires need to be connected to other wires, in order to reduce the operation steps before and after the threading operation as much as possible, the connector 4 provided in this embodiment can also be used to connect two wires after the threading operation is completed. Specifically, the connector 4 includes a connecting cylinder 41, a first pressing plate 42, a plurality of first constraint shafts 43 and a plurality of first bolts 44. The connecting cylinder 41 is detachably connected to the traction rope 2, each first constraint shaft 43 passes through the connecting cylinder 41 and is fixedly connected to the first pressing plate 42, each first constraint shaft 43 is slidably connected to the connecting cylinder 41, each first bolt 44 passes through the connecting cylinder 41 and abuts against the first pressing plate 42, and each first bolt 44 is threadedly connected to the connecting cylinder 41; the connecting cylinder 41 is used to place the conductor in the wire, and the first pressing plate 42 is driven by rotating the first bolt 44 to fix the conductor.

[0037] The first constraint shaft 43 is designed to provide guidance for the movement of the first pressing piece 42, and the first pressing piece 42 is in direct contact with the conductor inside the connecting cylinder 41 and uses the pressure applied by the bolt to fix the conductor in the connecting cylinder 41. This ensures that the wire will not loosen or fall off due to vibration or external force during the traction process, thereby ensuring the stability and safety of power transmission.

[0038] It should be noted that, since the outer wall of the wire is smooth, if the traction rope 2 needs to be fixedly connected to the wire, it needs to be knotted and fixed, which makes the operation more complicated. After the connector 4 is used, the traction rope 2 can be connected to any part on the connector 4 and can be directly cut off after use, which improves convenience.

[0039] Furthermore, the connecting tube 41 includes a main body 411 with a C-shaped cross-section and two side plates 412 inclined toward the inside of the connecting tube 41. The main body 411 and the two side plates 412 together form a space for placing the wire conductor. An arc 413 is provided at the connection between the two side plates 412, and the ends of the two side plates 412 away from the arc 413 are connected to the main body 411.

[0040] Specifically, the optimized design of the connecting tube 41 in this embodiment is specifically embodied in its unique C-shaped cross-section body 411 and two side plates 412 inclined inwardly toward the connecting tube 41. This design takes into account both strength and stability, and provides great convenience for the installation of the wire conductor. The design of the C-shaped body 411 not only ensures the firmness of the structure, but also reserves enough space so that the wire conductor can be smoothly guided into the inside of the connecting tube 41. At the same time, the two side plates 412 inclined inwardly toward the connecting tube 41 and the C-shaped body 411 jointly construct a space that can effectively prevent the wire conductor from falling off. The two side plates 412 are tightly combined with the main body 411 at one end away from the arc 413 to form a solid protrusion. It is worth noting that the cross-sectional area of ​​this protrusion is smaller than that of the main body 411, so that when the conductor is squeezed by the first pressing plate 42, a more concentrated pressure effect can be generated. Thereby, the pressing effect is improved, and the conductor fits more closely inside the connecting tube 41, thereby greatly enhancing the stability and reliability of the connection.

[0041] Furthermore, the connector 4 also includes a metal sheet 45, a second pressing piece 471, a second constraint shaft 472, a second bolt 473 and an external tube 47 detachably connected to the connecting tube 41, the metal sheet 45 is fitted against the inner wall of the connecting tube 41, an interface 46 is provided on the side wall of the connecting tube 41, the external tube 47 is detachably connected to the interface 46, the second constraint shaft 472 passes through the connecting tube 41 and is fixedly connected to the second pressing piece 471, and the second constraint shaft 472 is slidably connected to the connecting tube 41; the second bolt 473 passes through the connecting tube 41 and abuts against the second pressing piece 471, and the second bolt 473 is threadedly connected to the connecting tube 41; the external tube 47 is used to place the conductor in the wire, and the second pressing piece 471 is driven by rotating the second bolt 473 to fix the conductor, and the wire passes through the interface 46 and abuts against the metal sheet 45.

[0042] Among them, the external connection tube 47 is a detachable component specially designed for the access of new wires. It is tightly connected to the main body 411 structure through the interface 46 on the side wall of the connecting tube 41. The connector 4 can be easily expanded as needed to connect more wires. The interior of the external connection tube 47 provides a safe and stable fixed environment to ensure that the new wires will not be damaged or displaced during the access process. The specific second constraint shaft 472 passes through the connecting tube 41 and is fixedly connected to the second pressing plate 471, and realizes a sliding connection with the connecting tube 41. It ensures that the second pressing plate 471 can move along a specific path when subjected to external force. The second pressing plate 471 is directly involved in the fixing process of the new wire. When the new wire is placed in the external connection tube 47, the second bolt 473 is rotated to drive the second pressing plate 471 to apply pressure to the wire to achieve fixation.

[0043] In addition, the metal sheet 45 is arranged to be close to the inner wall of the connecting tube 41, and acts as a conductive bridge. When a new wire is connected to the system through the external connecting tube 47, the metal sheet 45 can ensure a stable electrical connection between the new wire and the original wire in the connecting tube 41. This design not only simplifies the connection process between wires, but also improves the efficiency and stability of electrical signal transmission.

[0044] Furthermore, in order to improve the connection stability and operation convenience between the external tube 47 and the interface 46 of the connecting tube 41, this embodiment adopts a T-shaped groove 461 on the interface 46, and a T-shaped protrusion adapted to the T-shaped groove 461 is provided on the end of the external tube 47, and the T-shaped protrusion is slidably connected with the T-shaped groove 461.

[0045] Among them, the sliding fit between the T-slot 461 and the T-shaped protrusion not only provides a sliding track that matches the T-shaped protrusion of the external tube 47, but also enhances the firmness of the connection through its unique shape. When the T-shaped protrusion of the external tube 47 slides into the T-slot 461, the contact area between the two is greatly increased, thereby effectively dispersing the pressure at the connection and improving the stability and durability of the connection. At the same time, the flexible installation and disassembly of the external tube 47 is achieved through the sliding connection. During operation, the user only needs to align the T-shaped protrusion with the T-slot 461, and then gently push the external tube 47 to achieve a tight connection between the two. This design not only simplifies the connection process, but also improves the convenience and efficiency of operation. If you want to fix it continuously, you only need to wrap the connection with electrical tape to complete the fixed connection.

[0046] Furthermore, when multiple wires do not need to be connected, the present embodiment uses a sealing plate to seal the interface 46. Specifically, the sealing plate is provided with a T-shaped protrusion adapted to the T-shaped slot 461, and the T-shaped protrusion is slidably connected to the T-shaped slot 461, so that the metal sheet 45 in the connecting tube 41 cannot be electrically conductive with an external charged object, thereby improving safety.

[0047] The specific principle of the in-wall threading device proposed in the present invention is as follows: when threading, the tractor 1, the traction rope 2 and the connector 4 are connected in sequence. The tractor 1 is used as the core power source, and the propeller 11 is driven to rotate by a micro motor to generate thrust. When the tractor 1 turns, the first shell 12 and the second shell 13 connected by the universal joint 14 realize flexible steering, and the pulley mechanism 15 on the shell is used to reduce friction, while ensuring stable travel in pipes of different diameters. In the pulley mechanism 15, the distance between the pulley 153 and the shell is adjustable, so that the tractor 1 can adapt to pipes of different sizes. The connector 4 connects the wire to the traction rope 2, and can be directly used for the connection between the wires after threading, which simplifies the operation steps of the threading process. The optimized design of the connecting tube 41 ensures the stable fixation of the wire conductor, and the introduction of the external connecting tube 47 makes the access of the new wire more convenient, and the sliding connection between the T-slot 461 and the T-shaped protrusion realizes the stable and easy-to-operate installation of the external connecting tube 47. When no additional connection is required, the use of the sealing plate effectively isolates the interface 46 and improves safety.

[0048] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wire threading device in a wall, characterized in that: include: A tractor, a traction rope and a connector, wherein the tractor is connected to the connector via the traction rope, and the connector is connected to the wire to be threaded; The tractor comprises a propeller, a motor connected to the propeller, a first housing sleeved on the motor, a battery, a second housing sleeved on the battery, a universal joint, and a plurality of pulley mechanisms. The propeller passes through the first housing and is fixedly connected to the motor. The motor is electrically connected to the battery. When the motor is powered on, it drives the propeller to rotate and generate thrust. The first housing is connected to the second housing through a universal joint for steering at a pipe bend. One end of the second housing away from the universal joint is connected to the traction rope. Three or more pulley mechanisms are disposed on the side walls of the first shell and the second shell, all the pulley mechanisms on the first shell are evenly distributed around the circumference of the side wall of the first shell, and all the pulley mechanisms on the second shell are evenly distributed around the circumference of the side wall of the second shell; Each of the pulley mechanisms includes a support member, a swing member and a pulley, one end of the support member is hinged to the first shell / second shell, and the other end of the support member is rotatably connected to the pulley; one end of the swing member is hinged to the first shell / second shell, and the hinged connection is fixed by a first bolt and a nut to control the rotation angle of the swing member; a sliding member is provided on the other end of the swing member, and the sliding member is slidably connected to a slide groove on the support member; by adjusting the rotation angle of the swing member, the support member is driven to rotate to adjust the distance between the pulley and the first shell / second shell.

2. The in-wall wire threading device according to claim 1, characterized in that: The included angle between the support member located on the first shell and the first shell is an acute angle, and the support member is inclined toward the direction of the propeller.

3. The in-wall wire threading device according to claim 1, characterized in that: A chamfer is provided on one end of the first shell close to the propeller.

4. The in-wall wire threading device according to claim 1, characterized in that: The sliding member is cylindrical, the sliding member is rotatably connected to the swing member, and the side wall of the sliding member is slidably connected to the sliding groove.

5. The in-wall wire threading device according to claim 1, characterized in that: The connector includes a connecting cylinder, a first pressing piece, a plurality of first constraint shafts and a plurality of first bolts. The connecting cylinder is detachably connected to the traction rope, each of the first constraint shafts passes through the connecting cylinder and is fixedly connected to the first pressing piece, and each of the first constraint shafts is slidably connected to the connecting cylinder; each of the first bolts passes through the connecting cylinder and abuts against the first pressing piece, and each of the first bolts is threadedly connected to the connecting cylinder; the connecting cylinder is used to place the conductor in the wire, and the first pressing piece is driven by rotating the first bolt to fix the conductor.

6. The in-wall wire threading device according to claim 5, characterized in that: The connecting tube includes a main body with a C-shaped cross-section and two side plates inclined toward the inside of the connecting tube. The main body and the two side plates together form a space for placing wire conductors. An arc is provided at the connection between the two side plates, and the ends of the two side plates away from the arc are connected to the main body.

7. A wall threading device according to any one of claims 5 to 6, characterized in that: The connector also includes a metal sheet, a second pressing sheet, a second constraint shaft, a second bolt and an external tube detachably connected to the connecting tube, the metal sheet fits against the inner wall of the connecting tube, an interface is provided on the side wall of the connecting tube, the external tube is detachably connected to the interface, the second constraint shaft passes through the connecting tube and is fixedly connected to the second pressing sheet, and the second constraint shaft is slidably connected to the connecting tube; the second bolt passes through the connecting tube and abuts against the second pressing sheet, and the second bolt is threadedly connected to the connecting tube; the external tube is used to place the conductor in the wire, and the second bolt is driven by rotating the second pressing sheet to fix the conductor, and the wire passes through the interface and abuts against the metal sheet.

8. The in-wall wire threading device according to claim 7, characterized in that: The interface is provided with a T-shaped slot, and the end of the external connection tube is provided with a T-shaped protrusion adapted to the T-shaped slot, and the T-shaped protrusion is slidably connected to the T-shaped slot.

9. The in-wall wire threading device according to claim 8, characterized in that: The connector also includes a sealing plate, on which a T-shaped protrusion adapted to the T-shaped slot is provided, the T-shaped protrusion is slidably connected to the T-shaped slot, and the sealing plate is used to close the interface when no other external wires are needed.

10. The in-wall wire threading device according to claim 1, characterized in that: A hook is provided on one end of the second shell away from the universal joint, and the hook is connected to the traction rope.

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