A high voltage cable continuous production line

Abstract

The application relates to the field of cable manufacturing, in particular to a high-voltage cable continuous production line which sequentially comprises a pay-off rack for paying out a cable core, a water-blocking tape winding machine for forming a water-blocking layer on the cable core, a front synchronous traction machine for traction of the cable, a cable storage device for storage of the cable to regulate the tension so that the tension of the cable is maintained stable between the winding and argon arc welding, a metal sleeve device for forming a metal sheath, a middle synchronous traction machine for traction of the cable, an extruding machine group for forming a non-metal sheath on the metal sheath, a cooling water tank for cooling and shaping the non-metal sheath, a rear synchronous traction machine for traction of the cable, and a take-up rack for winding the finally formed cable, so that the tension of the cable between the winding and the argon arc welding in the manufacturing process is better controlled.

Description

Technical Field

[0001] This application relates to the field of cable manufacturing, and more particularly to a continuous production line for high-voltage cables. Background Technology

[0002] High-voltage cables have high usage requirements and require multiple protective layers. Therefore, on the corresponding production line, the cables are continuously passed through each relevant piece of equipment to install the corresponding layers.

[0003] The existing cable production line with announcement number CN218384639U first wraps the cable core with water-blocking tape, then forms a metal sheath through a metal sheathing device, forms a non-metallic sheath through a multi-layer co-extrusion unit, and finally winds up the manufactured cable.

[0004] Regarding the aforementioned technologies, the transmission speed of the cable may be inconsistent during the wrapping and argon arc welding processes. During long-term continuous operation, the cable tension cannot be well guaranteed, which can easily affect the cable forming quality. Summary of the Invention

[0005] In order to reduce the impact on the quality of cable forming, this application provides a continuous production line for high-voltage cables.

[0006] The high-voltage cable continuous production line provided in this application adopts the following technical solution.

[0007] A high-voltage cable continuous production line includes, in sequence, a wire feeding rack for releasing cable core wires, a water-blocking tape wrapping machine for forming a water-blocking layer on the core wires, a front synchronous traction machine for pulling the cable, a wire storage device for storing the cable to regulate tension so that the cable tension remains stable between wrapping and argon arc welding, a metal sheathing device for forming a metal sheath, a middle synchronous traction machine for pulling the cable, an extrusion unit for forming a non-metallic sheath on the metal sheath, a cooling water tank for cooling and shaping the non-metallic sheath, a rear synchronous traction machine for pulling the cable, and a take-up rack for winding the finally formed cable.

[0008] By adopting the above technical solution, after each cable completes the corresponding water-blocking tape wrapping, it will pass through the cable storage device. The cable storage device can store a certain length of cable, so that when the cable tension is inconsistent due to the difference in cable transmission speed between the front and rear devices, the cable stored in the cable storage device can be released or the cable with excessively loose tension can be taken in, thereby realizing the adjustment of cable tension and reducing the impact on quality caused by the inconsistent cable transmission speed during the cable manufacturing process of wrapping and argon arc welding.

[0009] Optionally, the cable storage device includes a frame, a fixed roller rotatably connected to the frame, a roller slider slidably connected to the frame, a moving roller rotatably connected to the roller slider, and a main control motor located on the frame and driving the roller slider to move. The moving roller and the fixed roller are used for cable winding. Two roller sliders are provided, and each roller slider is provided with a moving roller.

[0010] By adopting the above technical solution, the two moving rollers can move independently, so that when tension problems occur at one end of the cable corresponding to each moving roller, they can be adjusted individually. This makes it less likely that the tension of both ends of the cable passing through the cable storage equipment will be adjusted simultaneously, thereby reducing the possibility of excessively affecting the tension of the cable during normal transmission.

[0011] Optionally, a middle roller is provided between the two moving rollers to maintain a fixed position with respect to the frame. The middle roller and the fixed roller are used for winding the cable.

[0012] By adopting the above technical solution, when the two moving rollers are adjusted individually, since a portion of the cable is transmitted on the middle roller, the tension of the cable on the two moving rollers is less likely to affect each other, so that the tension of the cable at both ends of the cable passing through the cable storage device can be better adjusted independently.

[0013] Optionally, the fixed roller is provided with two cable guides connected to the frame on the side away from the middle roller. Each cable guide corresponds to the middle roller and a moving roller. The cable guide is used for the cable sent from the fixed roller to pass through and then be sent back to the fixed roller.

[0014] By adopting the above technical solution, the cable will first pass through the cable guide when it is transferred from the moving roller to the middle roller, so that the cable can be transmitted stably.

[0015] Optionally, the cable guide is rotatably connected to the frame, the cable guide is fixedly connected to a block, the block is threadedly connected to a plug, and the frame has two sets of positioning holes, two in each set, and each plug can be inserted into any one of the two positioning holes in the same set.

[0016] By adopting the above technical solution, the insertion plug can be unscrewed out of the positioning hole, and the angle of the cable guide can be adjusted to better accommodate cables transmitted from different directions, so that the first end of the cable can pass through the cable storage device.

[0017] Optionally, the middle roller is rotatably connected to an adjusting component, which is slidably connected to the frame to change the distance between the middle roller and the fixed roller. The adjusting component is threadedly connected to an adjusting screw rotatably connected to the frame, and the adjusting screw is coaxially fixedly connected to a middle roller knob.

[0018] By adopting the above technical solution, the length of the cable winding that the cable storage equipment can provide can be adjusted. This allows the cable manufacturing process to adapt to unexpected situations when the distance between the moving roller and the stationary roller moves to its limit.

[0019] Optionally, the frame is slidably connected to two side sliders, and the side sliders are rotatably connected to an adjustment roller close to the fixed roller. The frame is rotatably connected to a bidirectional screw threaded to the two side sliders and driving the two side sliders to move closer or further apart. The line connecting the fixed roller and the moving roller forms an angle with the straight line along the length direction of the bidirectional screw. The bidirectional screw is driven to rotate by the main adjustment motor.

[0020] By adopting the above technical solution, the distance between the two adjustment rollers is increased, which makes the length of the cable wound between the fixed roller and the corresponding moving roller longer, and vice versa. This improves the adjustment range of cable tension without increasing the horizontal distance between the moving roller and the fixed roller, and also helps to reduce the overall space occupied by the cable storage equipment.

[0021] Optionally, the output shaft of the main control motor is coaxially fixedly connected to a transmission gear, the transmission gear meshes with a middle gear rotatably connected to the frame, the middle gear is coaxially fixedly connected to a worm, and the worm meshes with a worm wheel coaxially fixedly connected to a bidirectional lead screw.

[0022] By adopting the above technical solution, the bidirectional lead screw can rotate stably.

[0023] Optionally, the output shaft of the main control motor is coaxially and detachably connected to a transmission screw that is threaded to the roller slider.

[0024] By adopting the above technical solution, the moving roller and the adjustment roller can be adjusted simultaneously, simplifying the control.

[0025] Optionally, the frame is rotatably connected with two sets of two side guide rollers in each set. A pressure block is slidably connected between the two side guide rollers in the same set. The moving direction of the pressure block is at an angle to the direction of the line connecting the two side guide rollers in the same set. A middle guide roller is rotatably connected to the pressure block. The middle guide roller and the two side guide rollers are connected to the cable in a zigzag pattern. A compression spring is provided in the frame that abuts against the pressure block. A pressure sensor is provided in the frame at the end of the compression spring away from the pressure block. The compression spring forces the middle guide roller to press against the cable. The pressure sensor causes the main control motor to rotate accordingly based on the pressure applied by the compression spring.

[0026] By adopting the above technical solution, the tension of the corresponding end of the cable can be adjusted individually according to the pressure detected by different pressure sensors.

[0027] In summary, this application includes at least one of the following beneficial effects: 1. Since the length of the tape roll is much shorter than the length of the cable, it is inevitable to replace the tape roll during the production process. However, the extrusion process requires continuous extrusion. Therefore, a cable storage device is set up to release the cable stored in the cable storage device. At this time, the water-blocking tape wrapping machine can be stopped to replace the tape roll. After the replacement is completed, the production speed before the cable storage is increased, so that the cable length is increased and stored in the cable storage device. The distance between the moving roller and the stationary roller is increased for use in the next tape roll replacement. 2. Integrating the three processes of related production technologies into one process facilitates production management, improves production efficiency, ensures product quality, increases the degree of automation of the production line, reduces the automation intensity of workers, and avoids quality problems such as damage to cables when they are hoisted together between processes. Attached Figure Description

[0028] Figure 1 This is a block diagram of the equipment in the production line of this application; Figure 2 This is a structural schematic diagram of the storage line equipment; Figure 3 This is a structural schematic diagram showing the removal of one side wall of the frame and a moving roller, and a partial cross-section of the stationary roller and the frame. Figure 4 yes Figure 3 Enlarged view of point A in the middle; Explanation of reference numerals in the attached drawings: 1. Water-blocking tape wrapping machine; 2. Inner metal sleeve equipment; 21. Pressure sensor; 22. Pay-off frame; 23. Front synchronous traction machine; 24. Take-up frame; 3. Middle synchronous traction machine; 31. Transmission gear; 32. Middle gear; 33. Worm; 34. Worm wheel; 35. Transmission screw; 36. Side guide roller; 37. Pressure block; 38. Middle guide roller; 39. Compression spring; 4. Extrusion unit; 41. Track block; 42. Insert; 43. Positioning hole; 44. Adjusting component; 45. Adjusting screw; 46. Middle roller knob; 47. Side slider; 48. Adjustment roller; 49. Bidirectional screw; 5. Cooling water tank; 51. Rear synchronous traction machine; 52. Wire storage equipment; 53. Frame; 54. Fixed roller; 55. Roller slider; 56. Moving roller; 57. Main adjustment motor; 58. Middle roller; 59. Cable guide. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a continuous high-voltage cable production line, referring to... Figure 1Along the cable transmission direction, the cable includes, in sequence, a cable release frame 22 for releasing the cable core wire, a water-blocking tape wrapping machine 1 for forming a water-blocking layer on the core wire, a front synchronous traction machine 23 for pulling the cable, a cable storage device 52 for storing the cable to regulate tension so that the cable tension remains stable between wrapping and argon arc welding, a metal sheathing device 2 for forming a metal sheath, a middle synchronous traction machine 3 for pulling the cable, an extrusion unit 4 for forming a non-metallic sheath on the metal sheath, a cooling water tank for cooling and shaping the non-metallic sheath, a rear synchronous traction machine 51 for pulling the cable, and a take-up frame 24 for winding the finally formed cable.

[0031] Metal sheathing equipment 2 can be used for producing corrugated aluminum sheaths, flat aluminum sheaths, corrugated copper sheaths, and flat copper sheaths, etc. Corrugated metal sheathing equipment includes a corrugating device, while flat metal sheathing equipment includes a diameter reduction device. Extrusion unit 4 can perform single-layer extrusion, two-layer extrusion, three-layer extrusion, and four-layer extrusion. Extruded materials include cable sheathing materials such as plastics and rubber. Before entering the die head, the cable core with the metal sheath can undergo anti-corrosion treatment and other processes, such as coating with asphalt, heating, and removing oxides. Cable storage equipment 52 is located in front of the cable during metal sheath forming to ensure the cable tension at the metal sheath forming point, where cable transmission speed requirements are strict and difficult to adjust.

[0032] Reference Figure 2 The cable storage device 52 includes a frame 53 placed on the ground. A horizontal fixed roller 54 is rotatably connected between the two inner walls of the frame 53. Two roller sliders 55 are slidably connected to the frame 53 along the horizontal radial direction of the fixed roller 54. The two roller sliders 55 correspond one-to-one with the two side walls of the frame 53. Moving rollers 56 are rotatably connected to the adjacent vertical sides of the two roller sliders 55. The height of the two moving rollers 56 is consistent with that of the fixed roller 54, and their axial direction is consistent with that of the fixed roller 54. One end of the cable enters from one side of the fixed roller 54 and is wound around the fixed roller 54 and the moving roller 56. The other end of the cable is output from the moving roller 56, which is away from the cable input end. This allows a certain length of cable to be wound between the fixed roller 54 and the moving roller 56. By changing the distance between the two moving rollers 56 and the fixed roller 54, the tension of the cable input storage device 52 and the cable output storage device 52 can be adjusted separately.

[0033] Reference Figure 2 and Figure 3Two side sliders 47 are slidably connected between the two side walls of the frame 53. The side sliders 47 move vertically and are close to the fixed roller 54. The two side walls of the frame 53 are rotatably connected to vertical bidirectional screws 49. The threads on both sides of the center point of the bidirectional screws 49 are opposite. The two side sliders 47 are threadedly connected one-to-one to the two sides of the center point of the bidirectional screws 49 at equal distances, so that the two side sliders 47 are close to or far away from each other. Each side slider 47 is rotatably connected to an adjusting roller 48. The axis of the adjusting roller 48 is in the same direction as the axis of the fixed roller 54. The cable passes through the two adjusting rollers 48 on the same vertical line at opposite points, so that the length of the cable that can be wound between the moving roller 56 and the fixed roller 54 is increased, so that the tension at both ends of the cable can be adjusted within a wider range.

[0034] Reference Figure 3 and Figure 4 A main adjustment motor 57 is detachably connected to both sides of the frame 53. The output shaft axis of the main adjustment motor 57 is aligned with the horizontal radial direction of the fixed roller 54. A transmission gear 31 is coaxially fixedly connected to the output shaft of the main adjustment motor 57. The transmission gear 31 meshes with a middle gear 32 rotatably connected to the frame 53. A worm gear 33 is coaxially fixedly connected to the middle gear 32. The worm gear 33 meshes with a worm wheel 34 rotatably connected to the frame 53. The worm wheel 34 is coaxially fixedly connected to a double-acting screw 49. The output shaft of the main adjustment motor 57 is detachably coaxially connected to a transmission screw 35 via a coupling. The transmission screw 35 is threadedly connected to the roller slider 55, allowing the moving roller 56 and the adjusting roller 48 on the same side wall of the frame 53 to be adjusted synchronously.

[0035] Reference Figure 2 and Figure 3 A set of side guide rollers 36 are rotatably connected to the frame 53 near both the cable input and output ends. The axis of the side guide rollers 36 is aligned with the axis of the guide roller 54. Two side guide rollers 36 are set at the same height. A pressure block 37 is slidably connected to the frame 53 in the vertical direction between the two side guide rollers 36. The height of the pressure block 37 is higher than that of the side guide rollers 36. A pressure sensor 21 is detachably connected to the frame 53 directly below the pressure block 37. The height of the pressure sensor 21 is aligned with that of the side guide rollers 36. A pressure spring 39 is fixedly connected between the upper surface of the pressure sensor 21 and the lower surface of the pressure block 37. The pressure spring 39 forces the pressure block 37 to move upward. A middle guide roller 38 is rotatably connected to the pressure block 37. The cable is transmitted from the bottom of the side guide rollers 36 and from the top of the middle guide roller 38.

[0036] The pressure sensor 21 outputs a real-time signal from the pressure spring 39 to the external controller, obtaining the pressure applied to the cable by the guide roller 38. The external controller has a preset standard pressure range. When the real-time cable pressure input by the pressure sensor 21 to the external controller exceeds the maximum value of the standard pressure range, the external controller controls the main adjustment motor 57 to operate, causing the corresponding moving roller 56 to move closer to the fixed roller 54, and the distance between the two corresponding adjusting rollers 48 in the same group to decrease, thus reducing the excessive tension at one end of the cable in the corresponding cable storage device 52. When the real-time cable pressure input by the pressure sensor 21 to the external controller is less than the minimum value of the standard pressure range, the external controller controls the main adjustment motor 57 to operate, causing the corresponding moving roller 56 to move away from the fixed roller 54, and the distance between the two corresponding adjusting rollers 48 in the same group to increase, thus increasing the excessive tension at one end of the cable in the corresponding cable storage device 52. When the real-time cable pressure input by the pressure sensor 21 to the external controller is within the standard pressure range, the main adjustment motor 57 does not operate.

[0037] Reference Figure 2 and Figure 3 A middle roller 58 is provided between the two moving rollers 56. The axis of the middle roller 58 is in the same direction as the axis of the moving rollers 56. After the cable input end is wound between the moving roller 56 and the fixed roller 54, it is first wound around the middle roller 58 and the fixed roller 54. Then, the cable fed out from the middle roller 58 and the fixed roller 54 is wound between the fixed roller 54 and the moving roller 56 away from the cable input end. This makes it less likely to affect the tension of the cable wound on the other moving roller 56 when one moving roller 56 is adjusted individually. Adjusting components 44 are rotatably connected to both ends of the middle roller 58. The adjusting components 44 are slidably connected to the frame 53 along the horizontal radial direction of the middle roller 58. The frame 53 is rotatably connected to the adjusting screw 45, which is threaded through and connected to the adjusting component 44. The end of the adjusting screw 45 is coaxially fixedly connected to the middle roller knob 46, so that the middle roller 58 can also be temporarily adjusted when the two moving rollers 56 reach the adjustment limit.

[0038] Reference Figure 2 and Figure 3The frame 53 is rotatably connected to two cable guides 59. The cable guides 59 are located on the side of the fixed roller 54 away from the middle roller 58. The arc-shaped side of the cable guides 59 away from the fixed roller 54 is used for the directional transmission of cables, so that the cables are less likely to detach from the middle roller 58 or the moving roller 56 due to the gap between the middle roller 58 and the moving roller 56. The cables are stably switched between the end of the middle roller 58 and the corresponding moving roller 56. The cable guides 59 are fixedly connected to the guide blocks 41, and the guide blocks 41 are threadedly connected to the inserts 42. The inserts 42 are inserted into the guide blocks 41 along the horizontal radial direction of the fixed roller 54. The frame 53 has a set of two positioning holes 43 for each cable guide 59. The inserts 42 can be inserted into any one of the positioning holes 43 in the same set, and the cable guides 59 are adjusted according to whether the cables are input into the cable guides 59 on the upper or lower side of the fixed roller 54.

[0039] The implementation principle of a high-voltage cable continuous production line according to an embodiment of this application is as follows: when the tension at both ends of the cable changes, the corresponding pressure sensor 21 can control the main adjustment motor 57 to run according to the detected pressure on the cable, so as to change the distance between the corresponding moving roller 56 and the fixed roller 54 and the distance between the two adjustment rollers 48 in the same group, so as to adjust the tension at both ends of the cable.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A continuous production line for high-voltage cables, characterized in that: The cable includes, in sequence, a cable release frame (22) for releasing the cable core wire, a water-blocking tape wrapping machine (1) for forming a water-blocking layer on the core wire, a front synchronous traction machine (23) for pulling the cable, a cable storage device (52) for storing the cable to regulate tension and maintain stable tension between wrapping and argon arc welding, a metal sheathing device (2) for forming a metal sheath, a middle synchronous traction machine (3) for pulling the cable, an extrusion unit (4) for forming a non-metallic sheath on the metal sheath, a cooling water tank (5) for cooling and shaping the non-metallic sheath, a rear synchronous traction machine (51) for pulling the cable, and a take-up frame (24) for winding the finally formed cable; the cable storage device (52) The system includes a frame (53), a fixed roller (54) rotatably connected to the frame (53), a roller slider (55) slidably connected to the frame (53), a moving roller (56) rotatably connected to the roller slider (55), and a main control motor (57) located on the frame (53) and driving the roller slider (55) to move. The moving roller (56) and the fixed roller (54) are used for cable winding. Two roller sliders (55) are provided, and each roller slider (55) is provided with a moving roller (56). The frame (53) is slidably connected to two side sliders (47). The side sliders (47) are rotatably connected to an adjustment roller (48) close to the fixed roller (54). The frame (53) is rotatably connected to the two side sliders (47) and threadedly connected to them. The bidirectional lead screw (49) drives the two side sliders (47) to move closer or further apart. The line connecting the fixed roller (54) and the moving roller (56) forms an angle with the straight line along the length direction of the bidirectional lead screw (49). The bidirectional lead screw (49) is driven to rotate by the main control motor (57). The output shaft of the main control motor (57) is coaxially fixedly connected to a transmission gear (31). The transmission gear (31) meshes with a middle gear (32) rotatably connected to the frame (53). The middle gear (32) is coaxially fixedly connected to a worm (33). The worm (33) meshes with a worm wheel (34) coaxially fixedly connected to the bidirectional lead screw (49). The frame (53) is rotatably connected to two sets of two side guide rollers (36). A pressure block (37) is slidably connected between two side guide rollers (36). The moving direction of the pressure block (37) is at an angle to the line connecting the two side guide rollers (36) in the same group. The pressure block (37) is rotatably connected to a middle guide roller (38). The middle guide roller (38) and the two side guide rollers (36) allow the cable to pass through in a zigzag pattern. A compression spring (39) is provided inside the frame (53) and abuts against the pressure block (37). A pressure sensor (21) is provided at the end of the compression spring (39) away from the pressure block (37). The compression spring (39) forces the middle guide roller (38) to press against the cable. The pressure sensor (21) rotates the main control motor (57) according to the pressure applied by the compression spring (39).

2. The high-voltage cable continuous production line according to claim 1, characterized in that: A middle roller (58) is provided between the two moving rollers (56) to keep the position fixed between the frame (53) and the middle roller (58) and the fixed roller (54) for the cable to be wound.

3. A continuous high-voltage cable production line according to claim 2, characterized in that: The fixed roller (54) has two cable guides (59) connected to the frame (53) on the side away from the middle roller (58). Each cable guide (59) corresponds to the middle roller (58) and a moving roller (56). The cable guide (59) allows the cable sent from the fixed roller (54) to be wound around and then sent back to the fixed roller (54).

4. A continuous high-voltage cable production line according to claim 3, characterized in that: The cable guide (59) is rotatably connected to the frame (53). The cable guide (59) is fixedly connected to the block (41). The block (41) is threadedly connected to the plug (42). The frame (53) has two sets of positioning holes (43) with two holes in each set. Each plug (42) can be inserted into any one of the two positioning holes (43) in the same set.

5. A continuous high-voltage cable production line according to claim 2, characterized in that: The middle roller (58) is rotatably connected to an adjusting member (44), which is slidably connected to the frame (53) to change the distance between the middle roller (58) and the fixed roller (54). The adjusting member (44) is threadedly connected to an adjusting screw (45) rotatably connected to the frame (53), and the adjusting screw (45) is coaxially fixedly connected to the middle roller knob (46).

6. A continuous high-voltage cable production line according to claim 1, characterized in that: The output shaft of the main motor (57) is detachably connected to a transmission screw (35) that is threaded to the roller slider (55).

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