A pneumatic conduit threading device

Abstract

This utility model relates to the field of electrical wiring technology, and more particularly to a pneumatic conduit threading device. The device includes a base, an air compressor, an air tank, a high-pressure hose, and a threading head. The air tank is fixed to the base, and the air compressor supplies air to it. The outlet of the air tank is connected to the inlet of the electrical conduit via the high-pressure hose. The threading head is placed inside the electrical conduit, and its tail is connected to a nylon rope. The threading head includes a cylindrical body, a front-end guide shroud, and an outer circumferential sealing ring. An annular pressurization chamber is formed between the guide shroud and the body. The body has a guide hole for introducing external high-pressure gas into the pressurization chamber, and the center of the guide shroud has a central through hole communicating with the pressurization chamber. This utility model utilizes the thrust generated by compressed air at the rear of the threading head, combined with the suction and cleaning effect generated by the high-speed airflow ejected at the front of the guide shroud, to synergistically propel the threading head forward, significantly improving threading efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrical wiring technology, and in particular to a pneumatic conduit threading device. Background Technology

[0002] In fields such as building construction and telecommunications cabling, it is often necessary to run electrical wires, fiber optic cables, or ropes through pre-buried conduits. Traditional methods of threading wires, such as manual pulling or spring threaders, are inefficient and difficult to handle long or curved conduits. Pneumatic threading devices can utilize the energy of compressed air to overcome the friction of the conduit walls, achieving fast and efficient threading. However, existing pneumatic threading devices still need improvement in thrust generation and airflow guidance. Utility Model Content

[0003] The technical solution adopted by this utility model is: a pneumatic electrical conduit threading device, including a base, an air compressor, an air tank, a high-pressure hose and a threading head. The air tank is fixed on the base, the air compressor is connected to the air tank through a pipeline, the outlet of the air tank is connected to the inlet of the electrical conduit through the high-pressure hose, the threading head is set inside the electrical conduit and can slide along its inner wall, and a nylon rope is connected to the tail of the threading head; The threading head includes a cylindrical body, a flow guide shroud disposed at the front end of the body, and at least one sealing ring disposed on the outer circumference of the body; The flow guide shroud and the main body form an annular pressure chamber. The main body has a flow guide hole that introduces external high-pressure gas into the pressure chamber. The flow guide shroud has a central through hole that is connected to the pressure chamber.

[0004] Furthermore, a connecting ring is provided at the tail of the main body, and the nylon rope is connected to the connecting ring.

[0005] Furthermore, the gas storage tank is equipped with a pressure regulating valve for controlling the outlet pressure and a pressure gauge for displaying the pressure.

[0006] Furthermore, a quick-opening valve is provided at the outlet of the gas storage tank.

[0007] Furthermore, it also includes a fixing plate, on which an air outlet pipe is fixed, and the high-pressure hose is connected to the air outlet pipe. The fixing plate has a through hole, through which the nylon rope passes and extends into the conduit to connect to the tail of the wire threader.

[0008] Furthermore, a caster wheel is fixed to the bottom of the base, and a push rod is fixed to the side of the base.

[0009] Compared with the prior art, the beneficial effects of this utility model are: The powerful thrust is provided by the compressed air at the rear of the threading head, while the high-speed airflow ejected from the front of the deflector generates suction and helps to clear obstacles inside the tube, greatly improving threading efficiency.

[0010] The quick-opening valve allows for rapid release of compressed air from the gas tank, enabling instant start-up; the design of the fixing plate makes the connection between the high-pressure hose and the nylon rope more secure and facilitates insertion into the electrical conduit. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the conduit during wiring. Figure 3 This is a schematic diagram of the thread end structure; Figure 4 This is a schematic diagram of the internal structure of the thread end.

[0012] In the diagram: 1-Base; 2-Air compressor; 3-Air tank; 4-High-pressure hose; 5-Wire threader; 6-Nylon rope; 7-Fixing plate; 11-Cassette wheel; 12-Push rod; 31-Pressure regulating valve; 32-Pressure gauge; 33-Quick-opening valve; 51-Main body; 52-Flow guide; 53-Sealing ring; 54-Pressure boosting chamber; 55-Flow guide hole; 56-Center through hole; 57-Connecting ring; 71-Air outlet pipe; 72-Through hole; 100-Electric conduit. Detailed Implementation

[0013] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0014] As shown in the figure, this utility model provides a pneumatic wire threading device, including a base 1, an air compressor 2, an air tank 3, a high-pressure hose 4, and a threading head 5.

[0015] The air tank 3 is fixed to the base 1. The air compressor 2 is connected to the air tank 3 via a pipeline for filling the air tank 3. The outlet of the air tank 3 is connected to the inlet of the electrical conduit 100 via a high-pressure hose 4. The wire threader 5 is located inside the electrical conduit 100 and can slide along the inner wall of the electrical conduit 100. The tail of the wire threader 5 is connected by a nylon rope 6.

[0016] In this embodiment, for ease of movement, a caster wheel 11 is fixed to the bottom of the base 1, and a push rod 12 is fixed to the side of the base 1.

[0017] For easy connection and fixation, a fixing plate 7 is also included. An air outlet pipe 71 is fixed on the fixing plate 7, and a high-pressure hose 4 is connected to the air outlet pipe 71. A through hole 72 is provided on the fixing plate 7, through which a nylon rope 6 passes and extends into the electrical conduit 100 to connect to the end of the wire threading head 5.

[0018] The cable threader 5 includes a cylindrical body 51, a flow guide 52 disposed at the front end of the body 51, and at least one sealing ring 53 disposed on the outer circumference of the body 51.

[0019] A ring-shaped pressurization chamber 54 is formed between the flow guide 52 and the main body 51. A flow guide hole 55 is provided on the main body 51 for introducing external high-pressure gas into the pressurization chamber 54. A central through hole 56 is provided in the center of the flow guide 52, and the central through hole 56 is connected to the pressurization chamber 54.

[0020] When compressed air enters the rear of the connector 5 through the high-pressure hose 4, a high-pressure zone is formed behind the connector 5 within the sealed space created by the compressed air and the inner wall of the conduit 100. The pressure difference generated in this high-pressure zone produces a strong forward thrust on the connector 5. This thrust overcomes the static and dynamic friction between the connector 5 and the inner wall of the conduit 100, and is the main driving force for the connector 5 to move forward.

[0021] Simultaneously, a portion of the compressed air enters the pressurization chamber 54, which is formed by the guide shroud 52 and the main body 51, through the guide hole 55 on the main body 51. Within the pressurization chamber 54, the air velocity is further increased, and it is ultimately ejected forward at high speed from the central through-hole 56 in the center of the guide shroud 52. This forward-ejected high-speed airflow creates a localized low-pressure zone between the front of the wire threading head 5 and the inner wall of the conduit 100. This low-pressure zone pulls the wire threading head 5 forward, working in synergy with the rear thrust to further accelerate the threading process.

[0022] In addition, the jet of high-speed airflow can also play a certain auxiliary role, such as blowing away dust and loose particles in the pipeline, or playing a certain lubricating role, reducing the friction between the threading head 5 and the pipeline wall, thereby improving the smoothness and success rate of threading.

[0023] To facilitate the connection of the nylon rope, a connecting ring 57 is provided at the tail of the main body 51, and the nylon rope 6 is connected to the connecting ring 57.

[0024] For ease of operation and safety, the gas storage tank 3 is equipped with a pressure regulating valve 31 for controlling the outlet pressure and a pressure gauge 32 for displaying the pressure.

[0025] A quick-opening valve 33 is provided at the outlet of the air tank 3 to control the release of compressed air.

[0026] Working principle: Check the pressure regulating valve 31 and pressure gauge 32 of the air tank 3. Adjust the working pressure to a suitable level according to the length and inner diameter of the conduit 100 using the pressure regulating valve 31. Thread the nylon rope 6 through the through hole 72 of the fixing plate 7 and fix one end to the connecting ring 57 at the end of the threading head 5. Insert the threading head 5 into the inlet end of the conduit 100, and then insert the air outlet pipe 71 of the fixing plate 7 into the inlet of the conduit 100. Start the air compressor 2 to begin filling the air tank 3 with air until the pressure gauge 32 displays the preset set pressure.

[0027] Quickly open the quick-opening valve 33 on the air tank 3. At this moment, compressed air instantly fills the rear of the threading head 5 through the high-pressure hose 4 and the air outlet pipe 71, generating a strong forward thrust on the threading head 5. Simultaneously, a portion of the compressed air is introduced into the pressurization chamber 54 formed between the guide shroud 52 and the main body 51 through the guide hole 55 on the main body 51. Inside the pressurization chamber 54, the air is constrained by the guide shroud 52 and finally ejected forward at high speed from the central through hole 56 in the center of the guide shroud 52. Under the combined action of the strong thrust from the rear and the suction, lubrication, and cleaning effect generated by the high-speed airflow in front, the threading head 5 begins to slide forward inside the conduit 100, pulling the nylon rope 6 forward along with it. When the other end of the nylon rope 6 is pulled out from the other end of the conduit 100, the threading process is complete. Subsequently, the nylon rope 6 can be used to pull the wire or cable that needs to be threaded.

Claims

1. A pneumatic conduit threading device, comprising a base (1), an air compressor (2), an air tank (3), a high-pressure hose (4), and a threading head (5), characterized in that: The gas storage tank (3) is fixed on the base (1), and the air compressor (2) is connected to the gas storage tank (3) through a pipeline. The outlet of the gas storage tank (3) is connected to the inlet of the electrical conduit (100) through the high-pressure hose (4). The wire threader (5) is set inside the electrical conduit (100) and can slide along its inner wall. The tail of the wire threader (5) is connected to a nylon rope (6). The wire threader (5) includes a cylindrical body (51) and is set in front of the body (51). The flow guide (52) at the end and at least one sealing ring (53) disposed on the outer circumference of the main body (51); an annular pressure chamber (54) is formed between the flow guide (52) and the main body (51), and a flow guide hole (55) is opened on the main body (51) to introduce external high-pressure gas into the pressure chamber (54). A central through hole (56) is opened in the center of the flow guide (52), and the central through hole (56) is connected to the pressure chamber (54).

2. The pneumatic conduit threading device according to claim 1, characterized in that: The tail of the main body (51) is provided with a connecting ring (57), and the nylon rope (6) is connected to the connecting ring (57).

3. The pneumatic conduit threading device according to claim 1, characterized in that: The gas storage tank (3) is equipped with a pressure regulating valve (31) for controlling the outlet pressure and a pressure gauge (32) for displaying the pressure.

4. The pneumatic conduit threading device according to claim 1, characterized in that: A quick-opening valve (33) is provided at the outlet of the gas storage tank (3).

5. A pneumatic conduit threading device according to claim 1, characterized in that: It also includes a fixing plate (7), on which an air outlet pipe (71) is fixed, and the high-pressure hose (4) is connected to the air outlet pipe (71). A through hole (72) is provided on the fixing plate (7), and the nylon rope (6) passes through the through hole (72) and extends into the electrical conduit (100) to connect to the tail of the threading head (5).

6. The pneumatic conduit threading device according to claim 1, characterized in that: The base (1) is fixed with a caster wheel (11) at the bottom and a push rod (12) is fixed on the side of the base (1).

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