Flaring device for CPVC cable pipe production

Abstract

The present invention belongs to the technical field of cable pipe production. Disclosed is a flaring device for CPVC cable pipe production. The flaring device comprises a bottom plate and a CPVC cable pipe body, wherein positioning holes are formed at four corners of the top of the bottom plate. In the present invention, a flaring assembly is provided to achieve the purpose of heating and flaring of one end of the CPVC cable pipe body; a positioning assembly is provided, such that the CPVC cable pipe body can be fixedly connected to a fixing shell; after flaring is completed, a user can drive the fixing shell and the CPVC cable pipe body to rotate by means of a driving assembly to separate a flared portion from an electric-heating flaring punch block, which facilitates removal of the CPVC cable pipe body from the device; and in the device, the CPVC cable pipe body is firstly rotated before being removed, so as to avoid the problem of the CPVC cable pipe body being difficult to remove due to the bonding of the flared portion thereof to the electric-heating flaring punch block.

Description

A CPVC cable tube production expansion device Technical Field

[0001] The invention belongs to the technical field of cable tube production, and particularly relates to a expanding device for producing CPVC cable tubes. Background Art

[0002] CPVC cable conduit, also known as CPVC power conduit, is commonly used as cable protection conduit. It features high strength, good flexibility, high-temperature resistance, corrosion resistance, flame retardancy, excellent insulation properties, pollution-free, non-aging properties, lightweight, and easy construction. Its performance significantly outperforms traditional asbestos cable conduit and ordinary PVC pipes, making it an ideal alternative to traditional power cable sheathing conduits. Existing CPVC cable conduits require flaring at their ends during production to connect two cable conduits, and a flaring device is used during this flaring operation.

[0003] Chinese patent publication number CN218256760U discloses a cable tube expansion forming machine device, which relates to the field of cable tube technology. By providing a push structure, an electric cylinder structure drives a movable plate toward the expansion device, and a placement plate uses an electric push rod to force a clamping plate to fix the cable tube to be processed inside the placement port, so that the cable tube to be processed can be stably moved to the expansion device. The entire movement process is mechanized, eliminating the need for manual pushing. This avoids the problem of skewed tubes causing inaccurate expansion and subsequent non-standard interface installation, ensuring the docking standards between cable tubes and reducing labor intensity.

[0004] The cable pipe expansion forming machine device involved in the above patent still has some obvious shortcomings during actual use. After heating and expanding, the device needs to pull the cable pipe out of the electric heating expansion punch. The end of the heated cable pipe is very likely to stick together with the electric heating expansion punch under the action of heating. Direct removal can easily cause damage to the expanded part. For this reason, the present invention proposes a CPVC cable pipe production expansion device to solve the problems existing in the prior art, so that when the cable pipe is taken out, one end of the cable pipe can be separated from the electric heating expansion punch for easy pulling out.

[0005] Summary of the Invention

[0006] The object of the present invention is to provide a flaring device for the production of CPVC cable pipes, so as to solve the problem raised in the above background technology that in the prior art, after the cable pipe is heated and expanded, the cable pipe needs to be pulled out from the electric heating flaring punch, and the end of the heated cable pipe is very likely to adhere to the electric heating flaring punch under the action of heat, and direct removal is likely to cause damage to the flared part.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A flaring device for producing CPVC cable tubes, comprising a base plate and a CPVC cable tube body. Positioning holes are provided at the four corners of the base plate's top. Two sets of support frames are mounted on the top of the base plate. Through grooves are provided on the surfaces of the support frames to match the CPVC cable tube body. The surface of the CPVC cable tube body is slidably connected to the inner wall of the through groove. A sliding assembly is provided between the through groove and the CPVC cable tube body.

[0009] Two groups of connecting rods are movably connected between the two groups of support frames via a rotating assembly. A fixed shell is fixedly installed between the two groups of connecting rods. A positioning assembly for fixing the fixed shell and the CPVC cable tube body is installed on the top of the fixed shell. A driving assembly for driving the CPVC cable tube body to rotate is installed on the top of the base plate and at a position corresponding to the fixed shell.

[0010] A flaring assembly for flaring the CPVC cable tube body is installed on one side of the top of the base plate and at a position corresponding to the CPVC cable tube body. The flaring assembly is equipped with a cooling assembly, which is installed on the top of the base plate.

[0011] Preferably, the sliding assembly includes an annular array of mounting holes installed on the inner wall of the through groove, and the inner cavity of the mounting hole is rotatably connected to a ball, one side of the ball passes through the mounting hole and extends to the inner cavity of the through groove, and the ball is located on one side of the inner cavity of the mounting hole and is rollingly connected to the surface of the CPVC cable tube body.

[0012] Preferably, the drive assembly includes an arc-shaped tooth plate fixedly mounted on the bottom of the fixed shell, a drive motor is fixedly mounted on the top of the base plate, a drive gear is fixedly mounted on the output shaft of the drive motor, and the bottom of the drive gear is engaged with the bottom of the arc-shaped tooth plate.

[0013] Preferably, a mounting bracket is fixedly connected to the bottom of the driving motor, and the bottom of the mounting bracket is fixedly connected to the top of the base plate.

[0014] Preferably, the positioning assembly includes an arc-shaped positioning plate arranged at the top of the inner cavity of the fixed shell, the arc-shaped positioning plate and the top of the fixed shell are fixedly connected with a positioning tube, the top of the positioning tube is threadedly connected with a positioning rod, and the bottom end of the positioning rod passes through the positioning tube and the fixed shell in sequence and extends to the inner cavity of the fixed shell and is rotatably connected to the top of the arc-shaped positioning plate.

[0015] Preferably, rubber protective pads are fixedly installed on the bottom of the arc-shaped positioning plate and the bottom of the inner cavity of the fixed shell, and the inner sides of the two groups of rubber protective pads are in contact with the surface of the CPVC cable tube body.

[0016] Preferably, the rotating assembly includes a rotating groove opened on the inner side of the two groups of support frames, the inner cavity of the rotating groove is rotatably connected to an annular rotating plate, and the two ends of the connecting rod are respectively fixedly connected to the surfaces of the two groups of annular rotating plates.

[0017] Preferably, connecting grooves adapted to the connecting rod are provided on both sides of the fixing shell, and the surfaces of the connecting grooves are fixedly connected to the surface of the connecting rod.

[0018] Preferably, the expansion assembly includes a chassis movably mounted on one side of the top of the base plate, a expansion mold shell is fixedly mounted on one side of the chassis, the cross-section of the expansion mold shell is arranged in a stepped shape, a driving cylinder is fixedly connected to one side of the chassis, the telescopic end of the driving cylinder passes through the chassis and extends to the outside of the chassis and is fixedly connected to an electrothermal expansion punch, and the surface of the electrothermal expansion punch is slidably connected to the inner cavity of the expansion mold shell.

[0019] Preferably, the cooling assembly includes a shell fixedly mounted on the surface of the flared mold shell, a cooling box is fixedly connected to the top of the base plate, a semiconductor refrigeration plate is fixedly mounted in the inner cavity of the cooling box, the heat dissipation end of the semiconductor refrigeration plate passes through the cooling box and extends to the outside of the cooling box, a pump body is fixedly mounted on the top of the base plate and on one side of the cooling box, the water inlet end of the pump body is connected to a water inlet pipe, the end of the water inlet pipe away from the pump body is connected to one side of the cooling box, the drainage end of the pump body is connected to a drainage pipe, the end of the drainage pipe away from the pump body is connected to the surface of the shell, the bottom of the shell is connected to a return pipe, and the bottom end of the return pipe is connected to the top of the cooling box.

[0020] Technical effects and advantages of the present invention: Compared with the prior art, the expansion device for CPVC cable tube production proposed by the present invention has the following advantages:

[0021] 1. The present invention utilizes a flaring assembly to heat and flare one end of a CPVC cable tube body. The positioning assembly connects and secures the CPVC cable tube body to a fixed housing. After flaring is complete, the user can rotate the fixed housing and the CPVC cable tube body via a drive assembly to separate the flared portion from the electrothermal flaring punch, thereby facilitating removal of the CPVC cable tube body from the device. The CPVC cable tube body is rotated before removal to prevent the flared portion of the CPVC cable tube body from adhering to the electrothermal flaring punch, making it difficult to remove.

[0022] 2. The present invention reduces the friction between the surface of the CPVC cable tube body and the through groove when the CPVC cable tube body is moved by providing a sliding assembly, thereby preventing the surface of the CPVC cable tube body from being worn due to friction between the through groove when the CPVC cable tube body is moved.

[0023] 3. The present invention can install and fix the fixed shell at different positions through the setting of the rotating assembly through the connecting rod, and can also improve the rotation stability when the driving assembly drives the fixed shell to rotate;

[0024] 4. The present invention provides a cooling assembly. After one end of the CPVC cable tube body is heated and expanded, the expanded portion can be quickly cooled by the cooling assembly to cool and shape the expanded portion of the CPVC cable tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of the present invention;

[0026] FIG2 is a schematic structural diagram of a drive assembly and a positioning assembly according to the present invention;

[0027] FIG3 is a schematic structural diagram of a sliding assembly and a rotating assembly of the present invention;

[0028] FIG4 is a schematic structural diagram of the flaring assembly of the present invention;

[0029] FIG5 is a schematic structural diagram of a cooling assembly according to the present invention;

[0030] FIG6 is a schematic structural diagram of the chassis of the present invention when it is in a rotating state.

[0031] In the figure: 1. Base plate; 2. CPVC cable tube body; 3. Positioning hole; 4. Support frame; 5. Through groove; 6. Connecting rod; 7. Fixing shell; 8. Mounting hole; 9. Ball bearing; 10. Arc tooth plate; 11. Driving motor; 12. Driving gear; 13. Mounting frame; 14. Arc positioning plate; 15. Positioning tube; 16. Positioning rod; 17. Rubber protective pad; 18. Rotating groove; 19. Annular rotating plate; 20. Connecting groove; 21. Chassis; 22. Expanding mold shell; 23. Driving cylinder; 24. Electric heating expanding punch; 25. Shell; 26. Cooling box; 27. Semiconductor cooling plate; 28. Pump body; 29. ​​Water inlet pipe; 30. Drain pipe; 31. Return pipe; 32. Filling pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The present invention provides a flaring device for CPVC cable tube production as shown in Figures 1 to 6, comprising a base plate 1 and a CPVC cable tube body 2. Positioning holes 3 are provided at the four corners of the top of the base plate 1. Through the arrangement of the base plate 1, the base plate 1 serves as the base of the device and can support the remaining structures of the device. Positioning holes 3 are provided on the surface of the base plate 1, which can be used to install and fix the device at the use position. During installation, the user can fix the base plate 1 to the installation base surface by using structures such as mounting bolts or mounting nails.

[0034] Preferably, two sets of support frames 4 are installed on the top of the base plate 1. The surface of the support frame 4 is provided with a through groove 5 adapted to the CPVC cable tube body 2. The surface of the CPVC cable tube body 2 is slidably connected to the inner wall of the through groove 5.

[0035] Specifically, through the coordinated use of the support frame 4 and the through groove 5, the CPVC cable tube body 2 can be supported and positioned. When the CPVC cable tube body 2 is moved and one end is aligned with the flaring assembly, the two sets of support frames 4 and the through groove 5 cooperate to support the CPVC cable tube body 2. When the CPVC cable tube body 2 moves, its surface will move in the inner cavity of the through groove 5 to improve its movement stability.

[0036] Among them, a sliding assembly is provided between the through groove 5 and the CPVC cable tube body 2. The sliding assembly includes a mounting hole 8 installed in a ring array on the inner wall of the through groove 5. The inner cavity of the mounting hole 8 is rotatably connected with a ball 9. One side of the ball 9 passes through the mounting hole 8 and extends to the inner cavity of the through groove 5. The ball 9 is located on one side of the inner cavity of the mounting hole 8 and is rollingly connected to the surface of the CPVC cable tube body 2.

[0037] By providing the sliding assembly, the friction between the surface of the CPVC cable tube body 2 and the inner wall of the through groove 5 can be reduced, thereby preventing the surface of the CPVC cable tube body 2 from sliding in the inner cavity of the through groove 5 during movement, thereby preventing scratches on the surface. By providing the ball bearings 9, when the CPVC cable tube body 2 is moved, its surface is in contact with the ball bearings 9, which drive the ball bearings 9 to rotate in the inner cavity of the mounting hole 8 during movement, thereby reducing the friction between the CPVC cable tube body 2 and the inner wall of the through groove 5.

[0038] It is worth noting that a flaring component for flaring the CPVC cable tube body 2 is installed on one side of the top of the base plate 1 and at the corresponding position of the CPVC cable tube body 2. The flaring component includes a chassis 21 movably installed on one side of the top of the base plate 1. A flaring mold shell 22 is fixedly installed on one side of the chassis 21. The cross-section of the flaring mold shell 22 is arranged in a stepped shape. A driving cylinder 23 is fixedly connected to one side of the chassis 21. The telescopic end of the driving cylinder 23 passes through the chassis 21 and extends to the outside of the chassis 21. It is fixedly connected to an electrothermal flaring punch 24. The surface of the electrothermal flaring punch 24 is slidably connected to the inner cavity of the flaring mold shell 22.

[0039] Through the setting of the flaring component, after one end of the CPVC cable tube body 2 is inserted into the inner cavity of the flaring mold shell 22, one end of the CPVC cable tube body 2 will rest against the step of the inner cavity of the flaring mold shell 22. At this time, the user can open the driving cylinder 23 through the external controller. After the driving cylinder 23 is connected to the external air source, its telescopic end will drive the electric heating type flaring punch 24 to move toward one end of the CPVC cable tube body 2, and make the electric heating type flaring punch 24 enter one end of the CPVC cable tube body 2 to heat and flare it. It is worth noting that the outer shell of the electric heating type flaring punch 24 is an aluminum shell, and a heating wire is installed inside it.

[0040] It should be noted that, in this embodiment, the chassis 21 and the base plate 1 are connected together in a movable manner. As shown in FIG6 , when the expansion is completed and the CPVC cable tube body 2 needs to be removed, the user can rotate the chassis 21 to pull out the CPVC cable tube body 2 from the end close to the chassis 21. Because the diameter of the expansion portion of the CPVC cable tube body 2 is larger than the diameter of the through groove 5 after the expansion is completed, the CPVC cable tube body 2 cannot be pulled out from the through groove 5 in the original way. It should also be noted that, because the chassis 21 and the base plate 1 are movable, the chassis 21 and the base plate 1 are connected together in a movable manner. As shown in FIG6 , when the expansion is completed and the CPVC cable tube body 2 needs to be removed, the user can rotate the chassis 21 to pull out the CPVC cable tube body 2 from the end close to the chassis 21. After removing the CPVC cable tube body 2, the position of the chassis 21 needs to be reset to ensure that the expansion mold shell 22 and the through groove 5 are in a coaxial state. In this state, a locking structure is needed to lock the chassis 21 and the base plate 1 together to lock and fix the use position of the chassis 21. The above-mentioned locking structure can use a fixed pin structure, but is not limited to a fixed pin structure. Those skilled in the art can select a suitable locking structure according to actual use requirements and apply it to this solution for locking and positioning the chassis 21, which will not be repeated here.

[0041] Furthermore, the expansion assembly is equipped with a cooling assembly, which is installed on the top of the base plate 1. The cooling assembly includes a shell 25 fixedly installed on the surface of the expansion mold shell 22. The top of the base plate 1 is fixedly connected to a cooling box 26. A filling pipe 32 is installed on the top of the cooling box 26. A pipe cover is installed on the top of the filling pipe 32. A semiconductor refrigeration plate 27 is fixedly installed in the inner cavity of the cooling box 26. The heat dissipation end of the semiconductor refrigeration plate 27 passes through the cooling box 26 and extends to the outside of the cooling box 26. A pump body 28 is fixedly installed on the top of the base plate 1 and on one side of the cooling box 26. The water inlet end of the pump body 28 is connected to a water inlet pipe 29. The end of the water inlet pipe 29 away from the pump body 28 is connected to one side of the cooling box 26. The drainage end of the pump body 28 is connected to a drain pipe 30. The end of the drain pipe 30 away from the pump body 28 is connected to the surface of the shell 25. The bottom of the shell 25 is connected to a return pipe 31, and the bottom end of the return pipe 31 is connected to the top of the cooling box 26.

[0042] After the expansion of one end of the CPVC cable tube body 2 is completed, the user can turn on the pump body 28 through the external controller. The pump body 28 can extract the coolant inside the cooling box 26 through the water inlet pipe 29 and discharge it into the inner cavity of the shell 25 through the drain pipe 30, so as to cool the expanded part of the CPVC cable tube body 2 and quickly shape it. The setting of the semiconductor refrigeration plate 27 can cool the coolant inside the cooling box 26. The setting of the return pipe 31 can discharge the coolant after absorbing heat back to the inner cavity of the cooling box 26 for further cooling, so as to achieve the purpose of circulating cooling.

[0043] Furthermore, two groups of connecting rods 6 are movably connected between the two groups of support frames 4 through a rotating assembly. The rotating assembly includes a rotating groove 18 opened on the inner side of the two groups of support frames 4. The inner cavity of the rotating groove 18 is rotatably connected to an annular rotating plate 19. The two ends of the connecting rod 6 are respectively fixedly connected to the surfaces of the two groups of annular rotating plates 19. A fixed shell 7 is fixedly installed between the two groups of connecting rods 6. Both sides of the fixed shell 7 are provided with connecting grooves 20 adapted to the connecting rod 6, and the surface of the connecting groove 20 is fixedly connected to the surface of the connecting rod 6.

[0044] By setting the rotating assembly, the stability of the movement of the connecting rod 6 and the fixed shell 7 can be improved. When the CPVC cable tube body 2 is rotated, the fixed shell 7 and the connecting rod 6 will rotate together. The rotation of the connecting rod 6 will drive the annular rotating plate 19 to rotate in the inner cavity of the rotating groove 18, thereby achieving the purpose of improving the rotation stability of the connecting rod 6 and the fixed shell 7. By setting the connecting groove 20, the fixed shell 7 can be installed and fixed on the surface of the connecting rod 6.

[0045] Preferably, a positioning assembly for fixing the fixed shell 7 and the CPVC cable tube body 2 is installed on the top of the fixed shell 7. The positioning assembly includes an arc-shaped positioning plate 14 provided on the top of the inner cavity of the fixed shell 7. The arc-shaped positioning plate 14 and the top of the fixed shell 7 are fixedly connected with a positioning tube 15. The top of the positioning tube 15 is threadedly connected with a positioning rod 16. The bottom end of the positioning rod 16 passes through the positioning tube 15 and the fixed shell 7 in sequence and extends to the inner cavity of the fixed shell 7 and is rotatably connected to the top of the arc-shaped positioning plate 14.

[0046] Through the setting of the positioning component, when installing the CPVC cable tube body 2, one end of the CPVC cable tube body 2 will be sequentially inserted into the two groups of through grooves 5 and the fixed shell 7 and extend to the inner cavity of the flaring mold shell 22. After one end thereof is pressed into the inner cavity of the flaring mold shell 22, the user can rotate the positioning rod 16. The rotation of the positioning rod 16 will cause one end of the positioning rod 16 to drive the arc-shaped positioning plate 14 to move, so as to press the CPVC cable tube body 2 tightly against the inner cavity of the fixed shell 7 to prevent the CPVC cable tube body 2 from moving during the flaring operation, thereby achieving the purpose of positioning and fixing the CPVC cable tube body 2.

[0047] Among them, rubber protective pads 17 are fixedly installed on the bottom of the arc-shaped positioning plate 14 and the bottom of the inner cavity of the fixed shell 7. The inner sides of the two sets of rubber protective pads 17 are in contact with the surface of the CPVC cable tube body 2.

[0048] By setting the rubber protective pad 17, when the CPVC cable tube body 2 is pressed and fixed, the rubber protective pad 17 is set at the connection between the arc-shaped positioning plate 14 and the fixing shell 7 and the CPVC cable tube body 2 to prevent the CPVC cable tube body 2 from being damaged by excessive pressing force. At the same time, it can increase the friction between the CPVC cable tube body 2 and the arc-shaped positioning plate 14 and the fixing shell 7 to achieve an anti-slip effect and improve the positioning effect.

[0049] It is worth noting that a driving assembly for driving the CPVC cable tube body 2 to rotate is installed at the top of the base plate 1 and at the corresponding position of the fixed shell 7. The driving assembly includes an arc-shaped tooth plate 10 fixedly installed at the bottom of the fixed shell 7. A driving motor 11 is fixedly installed on the top of the base plate 1. The output shaft of the driving motor 11 is fixedly installed with a driving gear 12. The bottom of the driving gear 12 is engaged with the bottom of the arc-shaped tooth plate 10. The bottom of the driving motor 11 is fixedly connected to a mounting bracket 13, and the bottom of the mounting bracket 13 is fixedly connected to the top of the base plate 1.

[0050] Through the setting of the drive component, after the CPVC cable tube body 2 is expanded and cooled and shaped, the user needs to remove the CPVC cable tube body 2 from the device. At this time, the user can turn on the drive motor 11 through the external controller. The output shaft of the drive motor 11 will drive the arc-shaped tooth plate 10 to rotate through the drive gear 12, and then drive the CPVC cable tube body 2 to rotate through the fixed shell 7, so that the end of the CPVC cable tube body 2 connected to the expansion mold shell 22 is loosened and separated from the expansion mold shell 22, so as to prevent the problem that one end of the CPVC cable tube body 2 is adhered to the expansion mold shell 22 due to heating, which is not conducive to removing the CPVC cable tube body 2.

[0051] It is worth noting that, in this embodiment, the drive motor 11 is also equipped with a brake system. When the CPVC cable tube body 2 is heated and expanded, the brake system will lock the output shaft of the drive motor 11 to prevent the CPVC cable tube body 2 from rotating during this process. After the expansion is completed, the user can reversely twist the positioning rod 16 to release the positioning effect on the CPVC cable tube body 2, so that the user can smoothly pull the CPVC cable tube body 2 out of the device.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flaring device for producing a CPVC cable tube, comprising a bottom plate (1) and a CPVC cable tube body (2), wherein positioning holes (3) are provided at four corners of the top of the bottom plate (1), and characterized in that: Two groups of support frames (4) are installed on the top of the base plate (1); a through groove (5) adapted to the CPVC cable tube body (2) is provided on the surface of the support frame (4); the surface of the CPVC cable tube body (2) is slidably connected to the inner wall of the through groove (5); a sliding component is provided between the through groove (5) and the CPVC cable tube body (2); Two groups of connecting rods (6) are movably connected between the two groups of support frames (4) via a rotating assembly, a fixing shell (7) is fixedly installed between the two groups of connecting rods (6), a positioning assembly for fixing the fixing shell (7) and the CPVC cable tube body (2) is installed on the top of the fixing shell (7), and a driving assembly for driving the CPVC cable tube body (2) to rotate is installed on the top of the base plate (1) and at a position corresponding to the fixing shell (7); A flaring component for flaring the CPVC cable tube body (2) is installed on one side of the top of the base plate (1) and at a position corresponding to the CPVC cable tube body (2), and a cooling component is installed in conjunction with the flaring component, and the cooling component is installed on the top of the base plate (1).

2. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: The sliding assembly comprises mounting holes (8) mounted in an annular array on the inner wall of the through groove (5); the inner cavity of the mounting holes (8) is rotatably connected with a ball (9); one side of the ball (9) passes through the mounting hole (8) and extends to the inner cavity of the through groove (5); and the ball (9) is located on one side of the inner cavity of the mounting hole (8) and is rollingly connected to the surface of the CPVC cable tube body (2).

3. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: The driving assembly comprises an arc-shaped toothed plate (10) fixedly mounted on the bottom of the fixed shell (7); a driving motor (11) is fixedly mounted on the top of the bottom plate (1); a driving gear (12) is fixedly mounted on the output shaft of the driving motor (11); and the bottom of the driving gear (12) is meshed with the bottom of the arc-shaped toothed plate (10).

4. The expansion device for producing CPVC cable tube according to claim 3, characterized in that: The bottom of the driving motor (11) is fixedly connected to a mounting frame (13), and the bottom of the mounting frame (13) is fixedly connected to the top of the base plate (1).

5. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: The positioning assembly comprises an arc-shaped positioning plate (14) arranged at the top of the inner cavity of the fixed shell (7), the arc-shaped positioning plate (14) and the top of the fixed shell (7) are fixedly connected with a positioning tube (15), the top of the positioning tube (15) is threadedly connected with a positioning rod (16), and the bottom end of the positioning rod (16) passes through the positioning tube (15) and the fixed shell (7) in sequence and extends to the inner cavity of the fixed shell (7) and is rotatably connected with the top of the arc-shaped positioning plate (14).

6. The expanding device for producing CPVC cable tubes according to claim 5, characterized in that: The bottom of the arc-shaped positioning plate (14) and the bottom of the inner cavity of the fixed shell (7) are both fixedly mounted with rubber protective pads (17), and the inner sides of the two groups of rubber protective pads (17) are in contact with the surface of the CPVC cable tube body (2).

7. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: The rotating assembly comprises a rotating groove (18) opened on the inner side of the two groups of support frames (4), the inner cavity of the rotating groove (18) is rotatably connected to an annular rotating plate (19), and the two ends of the connecting rod (6) are respectively fixedly connected to the surfaces of the two groups of the annular rotating plates (19).

8. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: Both sides of the fixed shell (7) are provided with connection grooves (20) adapted to the connection rod (6), and the surface of the connection groove (20) is fixedly connected to the surface of the connection rod (6).

9. The expanding device for producing CPVC cable tube according to claim 1, characterized in that: The expansion assembly comprises a chassis (21) movably mounted on one side of the top of the base plate (1); an expansion mold shell (22) is fixedly mounted on one side of the chassis (21); the cross section of the expansion mold shell (22) is arranged in a stepped shape; a driving cylinder (23) is fixedly connected to one side of the chassis (21); the telescopic end of the driving cylinder (23) penetrates the chassis (21) and extends to the outside of the chassis (21); an electric heating type expansion punch (24) is fixedly connected thereto; the surface of the electric heating type expansion punch (24) is slidably connected to the inner cavity of the expansion mold shell (22).

10. A CPVC cable tube production expansion device according to claim 9, characterized in that: The cooling assembly comprises a shell (25) fixedly mounted on the surface of the expansion mold shell (22); a cooling box (26) is fixedly connected to the top of the bottom plate (1); a semiconductor cooling sheet (27) is fixedly mounted in the inner cavity of the cooling box (26); a heat dissipation end of the semiconductor cooling sheet (27) passes through the cooling box (26) and extends to the outside of the cooling box (26); a pump body (28) is fixedly mounted on the top of the bottom plate (1) and located on one side of the cooling box (26); The water inlet end of the pump body (28) is connected to a water inlet pipe (29), and the end of the water inlet pipe (29) away from the pump body (28) is connected to one side of the cooling box (26). The drainage end of the pump body (28) is connected to a drainage pipe (30), and the end of the drainage pipe (30) away from the pump body (28) is connected to the surface of the shell (25). The bottom of the shell (25) is connected to a return pipe (31), and the bottom end of the return pipe (31) is connected to the top of the cooling box (26).

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