A kind of clark tube electric fuse pre-embedding device

Abstract

The utility model relates to the technical field of clara pipe production equipment, more particularly, relate to a kind of clara pipe electric melting wire embedding device, including steel mould, U-shaped plate and first telescopic part, steel mould includes inner tube and outer tube, at least one end of inner tube protrudes from outer tube, outer tube is evenly provided with the U-shaped slot that can be inserted by U-shaped plate along the circumferential direction in this end, U-shaped plate is fixedly installed in the telescopic end of first telescopic part, and first telescopic part is fixedly installed on external rack.The utility model can be automatically wired to electric melting wire, makes electric melting wire and pipe body integrated in pipe body winding process, realizes that electric melting wire is evenly wired in pipe material inner surface.

Description

Technical Field

[0001] This utility model relates to the technical field of kraft tube production equipment, and more specifically, to a kraft tube electrofusion wire pre-embedding device. Background Technology

[0002] HDPEB type Krah pipes are made of high-density polyethylene (HDPE) as the base material and are manufactured using a spiral winding process. They combine high strength, ring stiffness, and flexibility, resisting soil settlement and external pressure, and are widely used in municipal drainage, industrial sewage, and stormwater management. Existing HDPEB type Krah pipes generally achieve connections between different pipe fittings in two ways: grooved and electrofusion. Grooved Krah pipes use socket rubber rings for sealing connections. This connection method is relatively simple, but it cannot guarantee a tight seal at the joint. Loosening often occurs during handling and trench backfilling, leading to poor sealing performance and leaks. Electrofusion Krah pipes, on the other hand, use embedded electrofusion wires. During connection, heating the wires melts the pipe material, achieving a seamless weld at the joint. Electrofusion connection technology ensures zero leakage at the joint, has long chemical corrosion resistance, and a service life of over 50 years, offering significant advantages over grooved Krah pipes. However, in the current actual production process of HDPEB Krah pipes, the electrofusion wire is laid out manually after the welding process begins, making it difficult to guarantee the uniformity of the wiring. This uneven heating of the electrofusion wire during electrofusion welding leads to unsatisfactory welding results. Therefore, there is an urgent need for a device that can achieve uniform wiring of the electrofusion wire. Utility Model Content

[0003] To address the technical problem of uneven wiring of electro-fusible wires caused by manual wiring in existing technologies, this utility model provides a pre-embedded device for electro-fusible wires in corrugated tubes. This device can automatically wire the electro-fusible wires, making the electro-fusible wires integrally formed with the tube body during the tube winding process, thereby achieving uniform wiring of the electro-fusible wires on the inner surface of the tube.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a pre-embedded device for electrofusion wire in a corrugated tube, comprising a steel mold, a U-shaped plate and a first telescopic component. The steel mold comprises an inner tube and an outer tube. At least one end of the inner tube protrudes from the outer tube. The outer tube at that end is uniformly provided with U-shaped grooves along the circumferential direction for the U-shaped plate to be inserted. The U-shaped plate is fixedly installed on the telescopic end of the first telescopic component, and the first telescopic component is fixedly installed on an external frame.

[0005] In this technical solution, the steel mold is a mold for manufacturing HDPEB Krah tubing, used to determine the internal shape of the HDPEB Krah tubing. The steel mold is connected to an external driving component, allowing it to rotate under the drive of the external driving component. The steel mold includes an inner tube and an outer tube, wherein the portion of the inner tube protruding from the outer tube is for winding electro-fusible wire, and the end of the outer tube is provided with a U-shaped groove, which is used to determine the shape of the electro-fusible wire. A first telescopic component and a U-shaped plate are also installed on the external frame, wherein the U-shaped plate can be inserted into the U-shaped groove. During this process, the U-shaped plate can push the electro-fusible wire wound on the inner tube into the U-shaped groove, thereby causing the electro-fusible wire to conform to the groove wall of the U-shaped groove, thus completing the change of the shape of the electro-fusible wire. The first telescopic component is used to drive the U-shaped plate to insert and pull out of the U-shaped groove. Multiple U-shaped channels are arranged along the circumference of the steel mold. Since the steel mold rotates at a constant speed, workers can manually adjust the frequency and speed of the reciprocating motion of the U-shaped plate driven by the first telescopic component to match the rotation speed of the steel mold. This ensures that the first telescopic component continuously pushes the electrofused wire into different U-shaped channels, ultimately completing the wiring of the electrofused wire. In actual operation, workers first manually pull and wind the electrofused wire onto the part of the inner tube protruding from the outer tube. Then, they manually control the first telescopic component to drive the U-shaped plate into the U-shaped channel. Next, workers manually pull the PE sheet material extruded from the die to cover the outer surface of the steel mold 1, encasing the electrofused wire within. Afterward, the equipment is switched on, and the steel mold rotates under the drive of the component. The PE sheet material gradually winds around the outer surface of the steel mold 1. During the PE sheet winding and covering process, the first telescopic component continuously drives the U-shaped plate to push the electrofused wire into the U-shaped groove for shaping, ensuring the electrofused wire is encased within the PE sheet material, ultimately completing the pre-embedding of the electrofused wire. In this process, the shape and position of the electric fuse wire are completely determined by the U-shaped groove. As long as the U-shaped groove is arranged evenly along the circumference, the pre-embedded electric fuse wire can also be evenly distributed, thus avoiding the problem of difficulty in ensuring uniformity caused by manual wiring. At the same time, the wiring process is automated, reducing the workload of the staff.

[0006] Preferably, the system further includes a linkage device for coordinating the movement of the first telescopic member and the steel mold. The first telescopic member is mounted on the linkage device, and the linkage device is fixedly mounted on the external frame. The linkage device and the first telescopic member are respectively electrically connected to the controller.

[0007] Preferably, the linkage device includes a rotating plate, a fixed plate, and a rotating shaft. The first telescopic member is fixedly installed on the rotating plate. The rotating plate is rotatably connected to the rotating shaft. The rotating shaft is fixedly connected to the fixed plate. The rotating shaft is located on the straight line of the axis of the steel mold. The fixed plate is fixed to the external frame. A torsion spring is sleeved on the rotating shaft. The torsion spring abuts against the rotating plate. An angle linkage device is also provided on the rotating plate. The angle linkage device is electrically connected to the controller.

[0008] Preferably, the angle linkage device is a second telescopic component, which includes an outer cylinder, a telescopic rod, and a spring. The outer cylinder is fixed to the rotating plate, the telescopic rod is inserted into the outer cylinder, and the spring is disposed inside the outer cylinder and abuts against the end of the telescopic rod inserted into the outer cylinder. Multiple slots for inserting the telescopic rod are evenly arranged along the circumferential direction on the inner wall surface of the inner tube end. A compression structure for compressing the second telescopic component is provided on the fixed plate, and the compression structure is connected to the telescopic rod. A sensing plate is also provided at the bottom of the outer cylinder, and the sensing plate is electrically connected to the controller.

[0009] Preferably, the compression structure is a chute, and a connecting rod is fixed on the telescopic rod. The connecting rod is inserted into the chute and slidably connected to the chute. The chute moves closer to the direction of the rotating shaft along the rotation direction of the steel mold.

[0010] Preferably, the fixing plate is further provided with a bracket, which abuts against the inner wall surface of the inner tube, and the length of the bracket is the same as the inner radius of the inner tube.

[0011] Preferably, at least two brackets are provided.

[0012] Preferably, a roller is provided at the end of the bracket away from the fixing plate, and the roller abuts against the inner wall surface of the inner tube.

[0013] Preferably, an arc-shaped structure protruding away from the U-shaped groove is provided between two adjacent U-shaped grooves.

[0014] Preferably, a limiting block is fixed on the outer wall surface of the inner tube protruding from the outer tube portion, and multiple limiting blocks are arranged along the circumferential direction of the inner tube, with the limiting blocks being offset from the position of the U-shaped groove.

[0015] Compared with the existing technology, the beneficial effects of this technical solution are as follows: an outer tube and an inner tube protruding from the outer tube are set on the steel mold, so that the protruding part of the inner tube can serve as a support for the winding of the electro-fusible wire. U-shaped grooves are evenly distributed along the circumference of the outer tube to determine the wiring shape and position of the electro-fusible wire, ensuring that the uniformity of the electro-fusible wire wiring meets the requirements. The first telescopic component and the U-shaped plate can automatically push the electro-fusible wire into the U-shaped groove, realizing the automation of electro-fusible wire wiring and reducing the labor load of the workers. Attached Figure Description

[0016] Figure 1 This is a perspective view of the pre-embedded device for the kraft tube electrofusion wire of this utility model;

[0017] Figure 2 This is a perspective view of the linkage device in the pre-embedded device for the kraft tube electrofusion wire of this utility model;

[0018] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0019] In the attached diagram: 1. Steel mold; 2. U-shaped plate; 3. First telescopic component; 4. U-shaped groove; 5. Linkage device; 11. Inner tube; 12. Outer tube; 13. Slot; 14. Arc-shaped structure; 15. Limiting block; 51. Rotating plate; 52. Fixing plate; 53. Rotating shaft; 54. Second telescopic component; 55. Slide groove; 56. Bracket; 57. Roller. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0023] Example 1

[0024] like Figure 1 As shown, a pre-embedded device for electrofusion wire in HDPEB tubes includes a steel mold 1, a U-shaped plate 2, and a first telescopic member 3. The steel mold 1 includes an inner tube 11 and an outer tube 12. At least one end of the inner tube 11 protrudes from the outer tube 12. The outer tube 12 at this end is uniformly provided with U-shaped grooves 4 along the circumferential direction for the insertion of the U-shaped plate 2. The U-shaped plate 2 is fixedly installed on the telescopic end of the first telescopic member 3, which is fixedly installed on an external frame. The steel mold 1 is a mold for making HDPEB tubes and is used to determine the internal shape of the HDPEB tubes. The steel mold 1 is connected to an external driving component, allowing the steel mold 1 to rotate under the drive of the external driving component. The steel mold 1 includes an inner tube 11 and an outer tube 12, wherein the portion of the inner tube 11 protruding from the outer tube 12 is suitable for electrofusion wire winding, and the end of the outer tube 12 is provided with a U-shaped groove 4, which is used to determine the shape of the electrofusion wire. The external frame is also equipped with a first telescopic component 3 and a U-shaped plate 2. The U-shaped plate 2 can be inserted into a U-shaped groove 4. During this process, the U-shaped plate 2 can push the fusible wire wound on the inner tube 11 into the U-shaped groove 4, so that the fusible wire adheres to the groove wall of the U-shaped groove 4, thereby changing the shape of the fusible wire. The first telescopic component 3 is used to drive the U-shaped plate 2 to insert and pull out of the U-shaped groove 4. There are multiple U-shaped grooves 4 arranged along the circumference of the steel mold 1. Since the rotation speed of the steel mold 1 is constant, the operator can manually set the frequency and speed of the reciprocating motion of the first telescopic component 3 to match the rotation speed of the steel mold 1, so that the first telescopic component 3 can continuously push the fusible wire into different U-shaped grooves 4 each time, ultimately completing the wiring of the fusible wire. In actual operation, the worker first manually pulls and winds the electrofusion wire onto the part of the inner tube 11 that protrudes from the outer tube 12. Then, the worker manually controls the first telescopic component 3 to drive the U-shaped plate 2 into the U-shaped groove 4. Next, the worker manually pulls the PE sheet material extruded from the die to cover the outer surface of the steel mold 1 and encase the electrofusion wire. Then, the equipment is turned on, and the steel mold 1 rotates under the drive of the drive component. At this time, the PE sheet material gradually winds around the outer surface of the steel mold 1. During the process of the PE sheet material winding and covering, the first telescopic component 3 continuously drives the U-shaped plate 2 to push the electrofusion wire into the U-shaped groove 4 for shaping, so that the electrofusion wire is wrapped in the PE sheet material, and finally the pre-embedding of the electrofusion wire is completed. In this process, the shape and position of the electrofusion wire are completely determined by the U-shaped groove 4. As long as the U-shaped groove 4 is evenly distributed along the circumference, the pre-embedded electrofusion wire can also be evenly distributed, thus avoiding the problem of difficulty in ensuring uniformity caused by manual wiring. At the same time, the wiring process is automated, reducing the workload of the workers.

[0025] like Figure 1As shown, it also includes a linkage device 5 for coordinating the movement of the first telescopic component 3 and the steel mold 1. The first telescopic component 3 is mounted on the linkage device 5, which is fixedly mounted on the external frame. The linkage device 5 and the first telescopic component 3 are electrically connected to the controller. By setting the linkage device 5, the operation of the first telescopic component 3 can be based on the rotation of the steel mold 1, thus eliminating the need for manual setting of the operating mode of the first telescopic component 3. This avoids discrepancies between the manual setting and the actual rotational movement of the steel mold 1, which could cause the first telescopic component 3 to fail to accurately insert into the U-shaped groove 4 when driving the U-shaped plate 2.

[0026] like Figure 2 As shown, the linkage device 5 includes a rotating plate 51, a fixed plate 52, and a rotating shaft 53. The first telescopic member 3 is fixedly installed on the rotating plate 51. The rotating plate 51 and the rotating shaft 53 are rotatably connected. The rotating shaft 53 is fixedly connected to the fixed plate 52. The rotating shaft 53 is located on the straight line of the axis of the steel mold 1. The fixed plate 52 is fixed to the external frame. A torsion spring is sleeved on the rotating shaft 53, and the torsion spring abuts against the rotating plate 51. An angle linkage device is also provided on the rotating plate 51, and the angle linkage device is electrically connected to the controller. When the U-shaped plate 2 on the first telescopic member 3 on the rotating plate 51 is inserted into the U-shaped groove 4, the U-shaped groove 4 will rotate with the rotation of the steel mold 1, thereby driving the U-shaped plate 2 and the rotating plate 51 to rotate. The fixed plate 52 is fixed to the external frame and will not rotate, thus forming a certain angle between the fixed plate 52 and the rotating plate 51, and the torsion spring is compressed. Once the included angle reaches a certain angle, it is sensed by the angle linkage device, which sends a signal to the controller. After receiving the signal, the controller controls the first telescopic member 3 to move the U-shaped plate 2 out of the U-shaped groove 4. At this time, the rotating plate 51 and the steel mold 1 are no longer connected. Under the action of the torsion spring, the included angle between the rotating plate 51 and the fixed plate 52 is quickly restored to the initial state. Then, the angle linkage device sends a signal to the controller again, and the controller controls the first telescopic member 3 to drive the U-shaped plate 2 to insert into the next U-shaped groove 4.

[0027] like Figure 2As shown, the angle linkage device is the second telescopic component 54, which includes an outer cylinder, a telescopic rod, and a spring. The outer cylinder is fixed to the rotating plate 51, and the telescopic rod is inserted into the outer cylinder. The spring is located inside the outer cylinder and abuts against the end of the telescopic rod inserted into the outer cylinder. Multiple slots 13 for inserting the telescopic rod are evenly arranged circumferentially on the inner wall of the inner tube 11. A compression structure for compressing the second telescopic component 54 is provided on the fixing plate 52, and the compression structure is connected to the telescopic rod. A sensing plate is also provided at the bottom of the outer cylinder, and the sensing plate is electrically connected to the controller. The positions of the slots 13 match the positions of the U-shaped grooves 4. In the initial state, the telescopic rod is inserted into the slot 13, and the U-shaped plate 2 is inserted into the U-shaped groove 4. As the fixed plate 52 and the rotating plate 51 rotate relative to each other, the compression structure drives the installation structure to compress the second telescopic member 54 until the telescopic rod in the second telescopic member 54 is pulled out of the slot 13. At this time, the telescopic rod touches the sensing plate located at the bottom of the outer cylinder. The sensing plate sends a signal to the controller to control the first telescopic member 3 to move the U-shaped plate 2 out of the U-shaped groove 4, so that the rotating plate 51 is disengaged from the steel mold 1. Under the action of the torsion spring, the rotating plate 51 returns to its original position. At this time, the compression structure no longer has a compressive effect on the second telescopic member 54. Under the action of the spring, the telescopic rod presses against the inner wall of the steel mold 1 until it moves to the next slot 13 and then inserts into the slot 13. At this time, the telescopic rod is disengaged from the sensing plate. The sensing plate sends a signal to the controller, and the controller then controls the first telescopic member 3 to drive the U-shaped plate 2 to insert into the next U-shaped groove 4. On the one hand, by setting the slot 13, the relative position of the second telescopic member 54 and the U-shaped plate 2 can be designed according to the relative position between the slot 13 and the U-shaped groove 4. As long as the telescopic rod in the second telescopic member 54 can be smoothly inserted into the slot 13, the precise alignment between the U-shaped plate 2 and the U-shaped groove 4 can be achieved. On the other hand, the relative rotation between the rotating plate 51 and the fixed plate 52 needs to overcome the elastic force of the torsion spring. This elastic force can be completely borne by the telescopic rod and the slot 13, avoiding structural damage caused by the U-shaped plate 2 or affecting the wiring of the electro-fusion wire.

[0028] like Figure 2 As shown, the compression structure is a groove 55, and a connecting rod is fixed on the telescopic rod. The connecting rod is inserted into the groove 55 and slidably connected to the groove 55. The groove 55 moves towards the direction of the rotating shaft 53 along the rotation direction of the steel mold 1. A through groove is provided on the surface of the outer cylinder. The connecting rod on the telescopic rod extends out of the outer cylinder through the through groove and extends into the groove 55, slidably connecting to the groove 55. When the rotating plate 51 rotates with the steel mold 1, the rotating plate 51 drives the connecting rod to rotate in the groove 55 and move towards the direction of the rotating shaft 53 along with the groove 55, thereby driving the telescopic rod to move, so that the telescopic rod is pressed into the outer cylinder. When the rotating plate 51 returns to its original rotation under the action of the torsion spring, the connecting rod also slides in the opposite direction in the groove 55, that is, moves away from the direction of the rotating shaft 53, so that the telescopic rod extends out of the outer cylinder.

[0029] Example 2

[0030] This embodiment is similar to Embodiment 1 above, except that, as Figure 1 , 2 As shown, a bracket 56 is also provided on the fixing plate 52. The bracket 56 abuts against the inner wall surface of the inner tube 11, and the length of the bracket 56 is the same as the inner radius of the inner tube 11. By having the bracket 56 abut against the inner wall surface of the inner tube 11, it is easy to confirm the relative position between the fixing plate 52 and the steel mold 1, and ensure that the rotating shaft 53 located on the fixing plate 52 is located on the axis of the steel mold 1.

[0031] like Figure 2 As shown, at least two supports 56 are provided. A single support 56 can only confirm the distance from the rotating shaft 53 to a point on the inner wall of the inner tube 11, which is insufficient to confirm whether the rotating shaft 53 is located on the axis of the steel mold 1. Therefore, at least two supports 56 are required.

[0032] like Figure 1 , 2 As shown, a roller 57 is also provided at the end of the bracket 56 away from the fixing plate 52, and the roller 57 abuts against the inner wall surface of the inner tube 11. By setting the roller 57, the bracket 56 and the inner wall surface of the inner tube 11 are in a rolling connection, which avoids the bracket 56 from directly contacting the inner wall surface of the inner tube 11, thus preventing damage to the bracket 56 structure or scratches to the inner wall surface of the inner tube 11.

[0033] Example 3

[0034] This embodiment is similar to Embodiment 1 above, except that, as Figure 3 As shown, an arc-shaped structure 14 protruding away from the U-shaped groove 4 is provided between two adjacent U-shaped grooves 4. This arrangement ensures that there are no sharp structures at the opening of the U-shaped groove 4, preventing accidental cuts to workers during operation. It also ensures that the wires are relatively smooth during wiring, preventing breakage due to excessive bending angles. Furthermore, it guides the U-shaped plate 2, allowing it to slide into the U-shaped groove 4 even if its position is slightly off.

[0035] like Figure 3 As shown, a limiting block 15 is fixed on the outer wall surface of the portion of the inner tube 11 that protrudes from the outer tube 12. Multiple limiting blocks 15 are arranged along the circumference of the inner tube, and their positions are offset from the U-shaped groove 4. The limiting blocks 15 restrict the position of the fuse wire, preventing it from falling off the inner tube 11. The offset position of the limiting blocks 15 from the U-shaped groove 4 avoids affecting the insertion of the U-shaped plate 2 into the U-shaped groove 4.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. 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 device for pre-embedding electrofusion wire in a corrugated tube, characterized in that, The device includes a steel mold (1), a U-shaped plate (2), and a first telescopic component (3). The steel mold (1) includes an inner tube (11) and an outer tube (12). At least one end of the inner tube (11) protrudes from the outer tube (12). The outer tube (12) at that end is uniformly provided with U-shaped grooves (4) along the circumferential direction for the U-shaped plate (2) to be inserted. The U-shaped plate (2) is fixedly installed at the telescopic end of the first telescopic component (3), and the first telescopic component (3) is fixedly installed on the external frame.

2. The device for pre-embedding a kraft tube electrofusion wire according to claim 1, characterized in that, It also includes a linkage device (5) for driving the first telescopic member (3) and the steel mold (1) to move in coordination. The first telescopic member (3) is mounted on the linkage device (5). The linkage device (5) is fixedly mounted on the external frame. The linkage device (5) and the first telescopic member (3) are electrically connected to the controller respectively.

3. The device for pre-embedding a kraft tube electrofusion wire according to claim 2, characterized in that, The linkage device (5) includes a rotating plate (51), a fixed plate (52), and a rotating shaft (53). The first telescopic member (3) is fixedly installed on the rotating plate (51). The rotating plate (51) is rotatably connected to the rotating shaft (53). The rotating shaft (53) is fixedly connected to the fixed plate (52). The rotating shaft (53) is located on the straight line where the axis of the steel mold (1) is located. The fixed plate (52) is fixed on the external frame. A torsion spring is sleeved on the rotating shaft (53). The torsion spring abuts against the rotating plate (51). An angle linkage device is also provided on the rotating plate (51). The angle linkage device is electrically connected to the controller.

4. The device for pre-embedding a kraft tube electrofusion wire according to claim 3, characterized in that, The angle linkage device is a second telescopic component (54), which includes an outer cylinder, a telescopic rod, and a spring. The outer cylinder is fixed on the rotating plate (51), the telescopic rod is inserted into the outer cylinder, and the spring is located inside the outer cylinder and abuts against the end of the telescopic rod inserted into the outer cylinder. Multiple slots (13) for inserting the telescopic rod are evenly arranged along the circumferential direction on the inner wall surface of the end of the inner tube (11). A compression structure for compressing the second telescopic component (54) is provided on the fixing plate (52). The compression structure is connected to the telescopic rod. A sensing plate is also provided at the bottom of the outer cylinder. The sensing plate is electrically connected to the controller.

5. The pre-embedded device for electrofusion wire in a corrugated tube according to claim 4, characterized in that, The compression structure is a chute (55), and a connecting rod is fixed on the telescopic rod. The connecting rod is inserted into the chute (55) and slidably connected to the chute (55). The chute (55) moves closer to the direction of the rotating shaft (53) along the rotation direction of the steel mold (1).

6. The device for pre-embedding a kraft tube electrofusion wire according to claim 3, characterized in that, The fixing plate (52) is also provided with a bracket (56), which abuts against the inner wall of the inner tube (11), and the length of the bracket (56) is the same as the inner radius of the inner tube (11).

7. The device for pre-embedding a corrugated tube electrofusion wire according to claim 6, characterized in that, At least two brackets (56) are provided.

8. The device for pre-embedding a corrugated tube electrofusion wire according to claim 6, characterized in that, The bracket (56) is also provided with a roller (57) at one end away from the fixing plate (52), and the roller (57) abuts against the inner wall surface of the inner tube (11).

9. A pre-embedded device for electrofusion wire in a corrugated tube according to claim 1, characterized in that, An arc-shaped structure (14) protruding away from the U-shaped groove (4) is provided between two adjacent U-shaped grooves (4).

10. A pre-embedded device for electrofusion wire in a corrugated tube according to claim 1, characterized in that, The inner tube (11) protrudes from the outer wall of the outer tube (12) and a limiting block (15) is fixed thereon. Multiple limiting blocks (15) are arranged along the circumferential direction of the inner tube (11). The limiting blocks (15) are offset from the U-shaped groove (4).

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