Wire threading device for embedded pipeline

Abstract

The utility model belongs to the technical field of building electrical construction, and discloses a threading device for an embedded pipeline. The threading device of the embedded pipeline comprises a traction piece, a pushing assembly and a gas transmission assembly. The traction member is configured to pull a cable. The pushing assembly is configured to be placed at one end of the embedded pipe, the pushing assembly is movably arranged in an inner cavity of the embedded pipe in the axial direction of the embedded pipe, the pushing assembly is in sliding contact with the inner wall of the embedded pipe, and the traction piece is connected with the end, away from the embedded pipe, of the pushing assembly. The air conveying assembly is arranged at one end of the embedded pipe, the output end of the air conveying assembly is flush with an inner cavity of the embedded pipe, and the air conveying assembly is used for inputting air flow into the embedded pipe so as to push the pushing assembly to move in the axial direction of the embedded pipe. According to the threading device of the embedded pipeline, the traction piece can be smoothly arranged in the embedded pipe in a penetrating mode, and the situation that sundries in the embedded pipe influence threading of the traction piece is avoided.

Description

Technical Field

[0001] This utility model relates to the field of building electrical construction technology, and in particular to a wire threading device for pre-embedded pipelines. Background Technology

[0002] During building construction, conduits are usually pre-embedded inside the building walls and other parts to facilitate the later installation of cables. To run the cables through the pre-embedded conduits, a pull wire (such as nylon tape) is usually first threaded through the conduit. Then, one end of the cable is connected to the pull wire, and the cable is pulled into the conduit by pulling the pull wire, thus ensuring that the cable is laid out according to the predetermined path.

[0003] In existing technologies, steel wire traction is typically used when laying traction cables. The steel wire is wound around a rotating disc, which is then driven by a motor to release the wire and allow it to pass through the pre-buried conduit. The traction cable is then connected to the steel wire, and the rotating disc is driven in the opposite direction, causing the steel wire to wind around the disc and pull the traction cable into the conduit. However, this method has several drawbacks. First, the steel wire needs to pass through the conduit multiple times, making the process cumbersome. Second, if there are obstructions in the conduit, they can hinder the wire's entry, affecting the laying process and potentially causing failure. This, in turn, prevents the traction cable from entering the conduit. Even if the traction cable does enter the conduit, obstructions can damage the cable during cable installation, affecting its conductivity and increasing the risk of circuit failure. Utility Model Content

[0004] The purpose of this utility model is to provide a wire threading device for pre-embedded pipelines, which can smoothly thread the traction component into the pre-embedded pipe, avoid the influence of debris in the pre-embedded pipe on the threading of the traction component, and at the same time prevent debris from scratching the cable, ensuring the conductivity of the cable and reducing the risk of circuit failure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A threading device for pre-embedded pipelines is provided, comprising:

[0007] A traction element, configured for pulling a cable;

[0008] A pushing component is configured to be placed at one end of a pre-embedded pipe, and the pushing component is movably disposed in the inner cavity of the pre-embedded pipe along the axial direction of the pre-embedded pipe. The pushing component is in sliding contact with the inner wall of the pre-embedded pipe, and the traction member is connected to the end of the pushing component away from the pre-embedded pipe.

[0009] An air supply component is disposed at one end of the pre-embedded pipe, and the output end of the air supply component is flush with the inner cavity of the pre-embedded pipe. The air supply component is used to input airflow into the pre-embedded pipe to push the pushing component to move along the axial direction of the pre-embedded pipe.

[0010] Optionally, the pushing assembly includes a main housing and a connector, the connector being disposed on the main housing, the traction member being connected to the connector, the main housing being in sliding contact with the inner wall of the pre-embedded pipe, and the cross-sectional area of ​​the main housing being slightly smaller than the cross-sectional area of ​​the pre-embedded pipe.

[0011] Optionally, the connector includes a connecting ring portion and a snap-fit ​​portion connected together. One end of the connecting ring portion away from the snap-fit ​​portion passes through the main housing. The traction member passes through the connecting ring portion and is bound to the connecting ring portion. The snap-fit ​​portion snaps into the main housing.

[0012] Optionally, the snap-fit ​​portion includes a first snap-fit ​​segment and a second snap-fit ​​segment connected at an angle, the end of the first snap-fit ​​segment away from the second snap-fit ​​segment is connected to the connecting ring portion, and the first snap-fit ​​segment abuts against the side of the main housing opposite to the connecting ring portion, and the second snap-fit ​​segment is inserted into the main housing.

[0013] Optionally, the air delivery assembly includes an air compression mechanism, a first delivery pipe, a booster mechanism, and a second delivery pipe. The output end of the air compression mechanism is connected to the input end of the booster mechanism through the first delivery pipe, and the output end of the booster mechanism is connected to the second delivery pipe. The second delivery pipe is flush with the pre-embedded pipe and is used to input airflow into the inner cavity of the pre-embedded pipe.

[0014] Optionally, both the first delivery pipe and the second delivery pipe are flexible hoses.

[0015] Optionally, the threading device for the pre-embedded pipeline further includes an adsorption element, which is wrapped around the outer wall of the pushing assembly and is used to adsorb debris in the pre-embedded pipe.

[0016] Optionally, the threading device for the pre-embedded pipeline further includes multiple telescopic components, which are spaced apart circumferentially along the pushing component. Each telescopic component is elastically expandable and contractible along the radial direction of the pre-embedded pipe, and the end of the telescopic component opposite to the pushing component makes rolling contact with the inner wall of the pre-embedded pipe.

[0017] Optionally, the telescopic assembly includes a first connecting cylinder, a second connecting cylinder, an elastic element, and a roller. The first connecting cylinder is disposed on the pushing assembly, and the second connecting cylinder is movably inserted into the first connecting cylinder along the extending direction of the first connecting cylinder. One end of the elastic element abuts against the bottom wall of the first connecting cylinder, and the other end abuts against the bottom wall of the second connecting cylinder. The roller is disposed on the side of the second connecting cylinder away from the first connecting cylinder, and the roller makes rolling contact with the inner wall of the embedded pipe.

[0018] Optionally, the threading device for the pre-embedded pipeline further includes a rolling element, which is disposed on the side of the pushing assembly facing the inner wall of the pre-embedded pipe, and the rolling element rolls in cooperation with the inner wall of the pre-embedded pipe.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a threading device for pre-embedded pipelines, including a traction component, a pushing component, and an air supply component. When threading the traction component into the pre-embedded pipe, the pushing component is placed at one end of the pre-embedded pipe and located in the inner cavity of the pipe. Then, the traction component is connected to the end of the pushing component facing away from the pre-embedded pipe. Next, the air supply component is aligned with the inner cavity of the pre-embedded pipe, and airflow is introduced into the pipe. This causes the airflow to push the pushing component to move axially along the pipe, thereby driving the traction component to pass through the pipe from one end and out from the other end. By setting the pushing component, the traction component can be driven through the pre-embedded pipe. When there are debris in the pipe, the pushing component can push the debris away, preventing it from affecting the threading of the traction component and allowing it to pass smoothly through the pipe. The pushing component can also push the debris out of the pipe, thus cleaning the inner cavity and preventing debris from scratching the cable during cable pulling, ensuring the cable's conductivity and reducing the risk of circuit failure. Attached Figure Description

[0021] Figure 1 This is a first view of the traction component being installed according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the gas delivery assembly provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the pushing component provided in this embodiment of the utility model;

[0024] Figure 4 This is a second view of the traction component being installed according to an embodiment of the present invention.

[0025] In the picture:

[0026] 100. Embedded pipes;

[0027] 1. Traction component;

[0028] 2. Pushing assembly; 21. Main housing; 22. Connector; 221. Connecting ring; 222. Snap-fit ​​part; 2221. First snap-fit ​​section; 2222. Second snap-fit ​​section;

[0029] 3. Air delivery assembly; 31. Air compression mechanism; 32. First delivery pipe; 33. Pressurization mechanism; 34. Second delivery pipe;

[0030] 4. Adsorption components. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] Example 1

[0036] This embodiment provides a wire threading device for a pre-embedded 100mm wire, such as... Figures 1 to 3 As shown, this allows the traction component 1 to be smoothly inserted into the pre-embedded pipe 100, preventing debris in the pre-embedded pipe 100 from affecting the insertion of the traction component 1. At the same time, it can prevent debris from scratching the cable, ensuring the conductivity of the cable and reducing the risk of circuit failure.

[0037] The cable threading device for the pre-embedded pipe 100 includes a traction component 1, a pushing component 2, and an air supply component 3. The traction component 1 is configured to pull the cable. After the traction component 1 is threaded, it can be tied to the cable, and then pulled to drive the cable into the pre-embedded pipe 100, ensuring the cable is laid out along the predetermined path. The pushing component 2 is positioned at one end of the pre-embedded pipe 100 and is movably disposed within the inner cavity of the pre-embedded pipe 100 along its axial direction. The pushing component 2 slides in contact with the inner wall of the pre-embedded pipe 100, and the traction component 1 is connected to the end of the pushing component 2 opposite to the pre-embedded pipe 100. The air supply component 3 is located at one end of the pre-embedded pipe 100, and its output end is flush with the inner cavity of the pre-embedded pipe 100. The gas delivery assembly 3 is used to input airflow into the pre-embedded pipe 100 to drive the push assembly 2 to move along the axial direction of the pre-embedded pipe 100.

[0038] When the traction component 1 is inserted into the pre-embedded pipe 100, the pushing component 2 is placed at one end of the pre-embedded pipe 100 and located in the inner cavity of the pre-embedded pipe 100. Then, the traction component 1 is connected to the end of the pushing component 2 away from the pre-embedded pipe 100. Then, the air supply component 3 is aligned with the inner cavity of the pre-embedded pipe 100 and airflow is input into the pre-embedded pipe 100. This causes the airflow to push the pushing component 2 to move along the axial direction of the pre-embedded pipe 100, thereby driving the traction component 1 to enter the pre-embedded pipe 100 from one end and exit the pre-embedded pipe 100 from the other end, thus realizing the insertion of the traction component 1. By setting the pushing component 2, the traction component 1 can be driven to pass through the pre-embedded pipe 100. When there are foreign objects in the pre-embedded pipe 100, the pushing component 2 can push the foreign objects to avoid affecting the installation of the traction component 1, so that it can be smoothly installed in the pre-embedded pipe 100. The pushing component 2 can also push the foreign objects out of the pre-embedded pipe 100, thereby cleaning the inner cavity of the pre-embedded pipe 100, preventing foreign objects from scratching the cable when pulling the cable, ensuring the conductivity of the cable, and reducing the risk of circuit failure.

[0039] For example, the traction element 1 includes nylon filaments.

[0040] Optionally, such as Figures 1 to 3As shown, the pushing assembly 2 includes a main housing 21 and a connector 22. The connector 22 is disposed on the main housing 21, and the traction member 1 is connected to the connector 22. The main housing 21 slides in contact with the inner wall of the pre-embedded pipe 100, and the cross-sectional area of ​​the main housing 21 is slightly smaller than that of the pre-embedded pipe 100. When the traction member 1 is inserted, the air supply assembly 3 inputs airflow into the pre-embedded pipe 100. The airflow pushes the main housing 21 to move axially along the pre-embedded pipe 100, thereby driving the traction member 1 to be inserted into the pre-embedded pipe 100 through the connector 22. The cross-sectional area of ​​the main housing 21 is slightly smaller than that of the pre-embedded pipe 100, which allows the main housing 21 to move axially within the pre-embedded pipe 100, while also ensuring that the main housing 21 can fully push against debris within the pre-embedded pipe 100, preventing debris from interfering with the insertion of the traction member 1, and also cleaning debris within the pre-embedded pipe 100 to avoid damage to the cable during subsequent cable laying.

[0041] Optionally, such as Figures 1 to 3 As shown, the connector 22 includes a connecting ring portion 221 and a snap-fit ​​portion 222 connected together. The end of the connecting ring portion 221 away from the snap-fit ​​portion 222 passes through the main housing 21, and the snap-fit ​​portion 222 snaps into the main housing 21. When connecting the traction member 1, the traction member 1 passes through the connecting ring portion 221 and is bound to it, thereby achieving the connection between the traction member 1 and the pushing assembly 2. The structure is simple, easy to operate, and convenient for installation and disassembly. Furthermore, by setting the snap-fit ​​portion 222 to snap into the main housing 21, the connection between the connector 22 and the main housing 21 can be strengthened, preventing the connector 22 from separating from the main housing 21 and affecting the insertion of the traction member 1.

[0042] Furthermore, such as Figure 1 and Figure 3 As shown, the locking part 222 includes a first locking segment 2221 and a second locking segment 2222 connected at an angle. The end of the first locking segment 2221 away from the second locking segment 2222 is connected to the connecting ring part 221, and the first locking segment 2221 abuts against the side of the main housing 21 opposite to the connecting ring part 221. The second locking segment 2222 is inserted into the main housing 21. By setting the first locking segment 2221 to abut against the side of the main housing 21 opposite to the connecting ring part 221, the connecting ring part 221 can be stably and firmly connected to the main housing 21, preventing it from detaching from the main housing 21, thereby ensuring that the pushing assembly 2 drives the traction member 1 to move along the pre-embedded pipe 100. By setting the second locking segment 2222 to be inserted into the main housing 21, the connection strength between the connecting ring part 221 and the main housing 21 can be further strengthened, preventing it from falling off and improving the overall connection stability between the connector 22 and the main housing 21.

[0043] Optionally, such as Figure 1 and Figure 2As shown, the air supply assembly 3 includes an air compression mechanism 31, a first delivery pipe 32, a pressurizing mechanism 33, and a second delivery pipe 34. The output end of the air compression mechanism 31 is connected to the input end of the pressurizing mechanism 33 through the first delivery pipe 32, and the output end of the pressurizing mechanism 33 is connected to the second delivery pipe 34. The second delivery pipe 34 is flush with the pre-embedded pipe 100 and is used to input airflow into the inner cavity of the pre-embedded pipe 100. When the traction member 1 is inserted, the air compression mechanism 31 is activated, and compressed gas is input into the first delivery pipe 32 from the output end of the air compression mechanism 31. Then, the gas enters the pressurizing mechanism 33, which pressurizes the gas to form an airflow. The airflow is then output from the second delivery pipe 34 and enters the inner cavity of the pre-embedded pipe 100. The airflow then pushes the pushing assembly 2 to move axially along the pre-embedded pipe 100, thereby driving the traction member 1 to be inserted into the pre-embedded pipe 100.

[0044] For example, the air compression mechanism 31 includes an air compressor, and the booster mechanism 33 includes a handheld booster.

[0045] Optionally, both the first delivery pipe 32 and the second delivery pipe 34 are flexible hoses. Flexible hoses have good deformation capacity and can be deformed arbitrarily according to the site conditions of the construction project. This facilitates the placement of the air compression mechanism 31 and the pressurization mechanism 33, and also helps to align the second delivery pipe 34 with the pre-embedded pipe 100, making it easier to input airflow into the pre-embedded pipe 100 to complete the installation of the traction component 1.

[0046] Example 2

[0047] Based on the same inventive concept as Embodiment 1, this embodiment provides a wire threading device for a pre-embedded tube 100. For example... Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the threading device for the pre-embedded pipe 100 further includes an adsorption element 4, which is wrapped around the outer wall of the pushing component 2. When the pushing component 2 drives the traction component 1 to move inside the pre-embedded pipe 100, the adsorption element 4 can contact the inner wall of the pre-embedded pipe 100, thereby wiping and adsorbing the debris attached to the inner wall of the pre-embedded pipe 100, keeping the inside of the pre-embedded pipe 100 clean, preventing debris from affecting the threading of the traction component 1, and preventing debris from affecting the conductivity of the subsequently laid cable.

[0048] Example 3

[0049] Based on the same inventive concept as Embodiments 1 and 2, this embodiment provides a threading device for pre-embedded pipe 100. The difference between this embodiment and Embodiments 1 and 2 is that the threading device for pre-embedded pipe 100 further includes multiple telescopic components, which are spaced apart circumferentially along the pushing component 2. Each telescopic component is elastically expandable and contractable radially along the pre-embedded pipe 100, with the end of the telescopic component facing away from the pushing component 2 making rolling contact with the inner wall of the pre-embedded pipe 100. For pre-embedded pipes 100 with varying diameters, when the pushing component 2 moves to the point of diameter change, airflow continues to be input. The airflow pushes the pushing component 2 to continue moving axially along the pre-embedded pipe 100, causing the telescopic components to automatically expand and contract, changing their extension length, thus ensuring that the telescopic components always maintain rolling contact with the inner wall of the pre-embedded pipe 100. By incorporating telescopic components, the threading device for pre-embedded pipe 100 can be applied to pre-embedded pipes 100 of various diameters, exhibiting strong versatility.

[0050] In some other embodiments, the pushing component 2 is provided with multiple telescopic components along the axial direction, with multiple telescopic components in each circle evenly distributed along the circumference of the pushing component 2. When the pushing component 2 moves along the axial direction of the pre-embedded pipe 100, the pushing component 2 can be subjected to uniform and balanced force, thereby enabling the pushing component 2 to move stably and fully push against the debris in the inner cavity of the pre-embedded pipe 100, ensuring the smooth insertion of the traction member 1.

[0051] In this embodiment, two rings of telescopic components are provided, with three telescopic components in each ring. In other embodiments, more than two rings of telescopic components may be provided, with two or more telescopic components in each ring, depending on actual needs; the number is not limited here.

[0052] Optionally, the telescopic assembly includes a first connecting cylinder, a second connecting cylinder, an elastic element, and a roller. The first connecting cylinder is disposed on the pushing assembly 2, and the second connecting cylinder is movably inserted into the first connecting cylinder along its extension direction. One end of the elastic element abuts against the bottom wall of the first connecting cylinder, and the other end abuts against the bottom wall of the second connecting cylinder. The roller is disposed on the side of the second connecting cylinder away from the first connecting cylinder, and the roller makes rolling contact with the inner wall of the embedded pipe 100.

[0053] When the pushing assembly 2 moves to the point where the diameter decreases, the inner wall of the embedded pipe 100 squeezes the telescopic assembly, thereby compressing the elastic element. Driven by the elastic element, the second connecting cylinder moves closer to the first connecting cylinder along its extension direction, thus reducing the effective length of the telescopic assembly and ensuring it presses against the inner wall of the embedded pipe 100. When the pushing assembly 2 moves to the point where the diameter increases, the inner wall of the embedded pipe 100 disengages from the telescopic assembly. At this time, the elastic element rapidly extends, causing the second connecting cylinder to move away from the first connecting cylinder along its extension direction, thereby increasing the length of the telescopic assembly. This ensures that the telescopic assembly remains pressed against the inner wall of the embedded pipe 100 at all times. The expansion and contraction of the telescopic assembly ensures the stability and reliability of the pushing assembly 2's operation.

[0054] The roller is located on the side of the second connecting cylinder away from the first connecting cylinder, and the roller makes rolling contact with the inner wall of the embedded pipe 100. When the pushing component 2 moves axially along the embedded pipe 100, it will drive the roller to roll along the inner wall of the embedded pipe 100, thereby enabling the pushing component 2 to move from one end of the embedded pipe 100 to the other end, ensuring smooth movement and improving work efficiency.

[0055] Example 4

[0056] Based on the same inventive concept as Embodiments 1, 2, and 3, this embodiment provides a threading device for the pre-embedded tube 100. The difference between this embodiment and Embodiments 1, 2, and 3 is that the threading device for the pre-embedded tube 100 further includes a rolling element. The rolling element is disposed on the side of the pushing assembly 2 facing the inner wall of the pre-embedded tube 100, and the rolling element rolls in cooperation with the inner wall of the pre-embedded tube 100. When the traction member 1 is threaded, the airflow pushes the pushing assembly 2 to move axially along the pre-embedded tube 100, while the rolling element rolls in cooperation with the inner wall of the pre-embedded tube 100. With the assistance of the rolling element, the pushing assembly 2 moves smoothly axially along the pre-embedded tube 100. By providing the rolling element, the friction between the pushing assembly 2 and the inner wall of the pre-embedded tube 100 can be reduced, allowing the pushing assembly 2 to move smoothly and preventing the pushing assembly 2 from being unable to move axially along the pre-embedded tube 100 due to excessive friction, thus avoiding affecting the threading of the traction member 1.

[0057] For example, the rolling element includes a ball. In other embodiments, the rolling element also includes a rollable structure such as a roller, which is not limited here.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A threading device for pre-embedded pipelines, characterized in that, include: The traction element (1) is configured for pulling the cable; The pushing component (2) is configured to be placed at one end of the pre-embedded pipe (100), and the pushing component (2) is movably disposed in the inner cavity of the pre-embedded pipe (100) along the axial direction of the pre-embedded pipe (100). The pushing component (2) slides in contact with the inner wall of the pre-embedded pipe (100), and the traction member (1) is connected to the end of the pushing component (2) away from the pre-embedded pipe (100). An air supply component (3) is disposed at one end of the pre-embedded pipe (100), and the output end of the air supply component (3) is flush with the inner cavity of the pre-embedded pipe (100). The air supply component (3) is used to input airflow into the pre-embedded pipe (100) to push the pushing component (2) to move along the axial direction of the pre-embedded pipe (100).

2. The threading device for pre-embedded pipelines according to claim 1, characterized in that, The pushing assembly (2) includes a main housing (21) and a connector (22). The connector (22) is disposed on the main housing (21). The traction member (1) is connected to the connector (22). The main housing (21) slides in contact with the inner wall of the pre-embedded pipe (100). The cross-sectional area of ​​the main housing (21) is slightly smaller than that of the pre-embedded pipe (100).

3. The threading device for pre-embedded pipelines according to claim 2, characterized in that, The connector (22) includes a connecting ring (221) and a snap-fit ​​(222) connected together. The end of the connecting ring (221) away from the snap-fit ​​(222) passes through the main housing (21). The traction member (1) passes through the connecting ring (221) and is tied to the connecting ring (221). The snap-fit ​​(222) snaps into the main housing (21).

4. The threading device for pre-embedded pipelines according to claim 3, characterized in that, The snap-fit ​​portion (222) includes a first snap-fit ​​segment (2221) and a second snap-fit ​​segment (2222) connected at an angle. The end of the first snap-fit ​​segment (2221) away from the second snap-fit ​​segment (2222) is connected to the connecting ring portion (221), and the first snap-fit ​​segment (2221) abuts against the side of the main housing (21) away from the connecting ring portion (221). The second snap-fit ​​segment (2222) is inserted into the main housing (21).

5. The threading device for pre-embedded pipelines according to claim 1, characterized in that, The air delivery assembly (3) includes an air compression mechanism (31), a first delivery pipe (32), a booster mechanism (33), and a second delivery pipe (34). The output end of the air compression mechanism (31) is connected to the input end of the booster mechanism (33) through the first delivery pipe (32). The output end of the booster mechanism (33) is connected to the second delivery pipe (34). The second delivery pipe (34) is flush with the pre-embedded pipe (100) and is used to input airflow into the inner cavity of the pre-embedded pipe (100).

6. The threading device for pre-embedded pipelines according to claim 5, characterized in that, Both the first delivery pipe (32) and the second delivery pipe (34) are flexible hoses.

7. The threading device for pre-embedded pipelines according to any one of claims 1-6, characterized in that, The threading device for the pre-embedded pipeline also includes an adsorption element (4), which is wrapped around the outer wall of the pushing component (2) and is used to adsorb debris in the pre-embedded pipe (100).

8. The threading device for pre-embedded pipelines according to any one of claims 1-6, characterized in that, The threading device for the pre-embedded pipeline also includes multiple telescopic components, which are arranged circumferentially at intervals along the pushing component (2). Each telescopic component is elastically expandable and contractable along the radial direction of the pre-embedded pipe (100). The end of the telescopic component away from the pushing component (2) rolls into contact with the inner wall of the pre-embedded pipe (100).

9. The threading device for pre-embedded pipelines according to claim 8, characterized in that, The telescopic assembly includes a first connecting cylinder, a second connecting cylinder, an elastic element, and a roller. The first connecting cylinder is disposed on the pushing assembly (2), and the second connecting cylinder is movably inserted into the first connecting cylinder along the extension direction of the first connecting cylinder. One end of the elastic element abuts against the bottom wall of the first connecting cylinder, and the other end abuts against the bottom wall of the second connecting cylinder. The roller is disposed on the side of the second connecting cylinder away from the first connecting cylinder, and the roller makes rolling contact with the inner wall of the pre-embedded pipe (100).

10. The threading device for pre-embedded pipelines according to any one of claims 1-6, characterized in that, The threading device for the pre-embedded pipeline also includes a rolling element, which is disposed on the side of the pushing assembly (2) facing the inner wall of the pre-embedded pipe (100) and the rolling element rolls in cooperation with the inner wall of the pre-embedded pipe (100).

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