Production device for large-section ultrahigh-voltage smooth aluminum sleeve cable

Abstract

The invention discloses a production device for a large-section ultrahigh-voltage smooth aluminum sleeve cable, belongs to the field of cable processing equipment, and solves the problems of non-uniform core wire wrapping specifications and the like caused by halt replacement of a buffer tape reel in the prior art. According to the application, the buffer tape wrapping structure is rotatably provided with the disc body, the middle part of the disc body is provided with the through hole for the cable to pass through, and the disc body is rotatably arranged around the through hole in the middle part; a plurality of buffer strip trays are arranged on the tray body and are annularly and uniformly arranged at intervals around a via hole of the tray body; an adjustable connecting mechanism is arranged between the buffer strip tray and the tray body, and the buffer strip tray and the tray body are arranged at an acute included angle through the adjustable connecting mechanism. According to the production device for the large-section ultrahigh-voltage smooth aluminum sleeve cable, the buffer tape reel can be replaced without shutdown, the efficiency is improved, and the situation that the wrapping specifications of core wires are not uniform is avoided.

Description

Technical Field

[0001] The invention relates to a production device for large-section ultra-high voltage smooth aluminum sheathed cables, belonging to the field of cable equipment. Background Art

[0002] After long-term operation, the shortcomings of the corrugated aluminum sheath gradually emerged, and the high-voltage system had the problem of buffer water-blocking layer ablation. The buffer layer is an important component of the high-voltage XLPE cable. When the buffer layer is severely ablated, it may even cause cable breakdown, thus affecting the operation of the power system. For high-voltage cables with copper wire shielding + aluminum-plastic composite tape shielding structure or smooth aluminum sheath shielding structure, the excessive air thermal resistance inside the corrugated aluminum sheath will not only reduce the current carrying capacity of the cable, but also the induced voltage of the corrugated aluminum sheath will cause discharge ablation on the insulated wire core. The smooth aluminum sheath cable avoids the problem of poor electrical contact because the aluminum sheath and the buffer layer are in close contact without gaps. In this context, the performance research and structural design of the smooth aluminum sheath cable have attracted the attention of the industry.

[0003] The existing buffer layer is formed by wrapping a buffer tape around the surface of the cable core wire. The buffer tape is generally wrapped in the form of multiple (at least three) buffer tapes laminated and wrapped. In this way, multiple buffer tape reels are required during wrapping. If the buffer tape of one of the buffer tape reels is used up, it is necessary to shut down the machine and replace the buffer tape reel. This practice not only reduces production efficiency, but also has many other defects. For example, the wrapping specifications of the buffer tape wrapped around the part of the core wire during the shutdown process are different from the wrapping specifications during the normal wrapping process. The wrapping specifications of the buffer tape wrapped during the restart process are different from the wrapping specifications during the normal wrapping process. This results in inconsistent core wire wrapping specifications, which is prone to quality problems and causes performance degradation of the cable. Summary of the invention

[0004] The present invention provides a production device for large-section ultra-high voltage smooth aluminum sheathed cables, which can replace buffer reels without stopping the machine, thereby improving efficiency and avoiding the situation where the core wire wrapping specifications are not uniform.

[0005] The technical solution adopted by the present invention is a production device for large-section ultra-high voltage smooth aluminum sheathed cables, comprising a cable pay-off portion and a cable aluminum sheath portion; a buffer belt wrapping structure is provided between the cable pay-off portion and the cable aluminum sheath portion;

[0006] The buffer belt is rotatably arranged around the wrapping structure, the middle of the disk body has a through hole for the cable to pass through, and the disk body is rotatably arranged around the through hole in the middle thereof;

[0007] The disc body is provided with a plurality of buffer belt material discs, which are evenly spaced and arranged in a ring shape around the through hole of the disc body;

[0008] An adjustable connection mechanism is provided between the buffer belt material tray and the tray body, and the buffer belt material tray and the tray body are arranged at an acute angle through the adjustable connection mechanism.

[0009] Optimally, the above-mentioned production device for large-section ultra-high voltage smooth aluminum sheathed cables has at least two groups of buffer tape wrapping structures, and the through holes of the disks of all buffer tape wrapping structures are coaxially arranged.

[0010] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheathed cable production device has at least four buffer belt material trays on each tray;

[0011] The buffer belt material tray is relatively fixed to the end of the adjustable connecting mechanism.

[0012] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheathed cable production device, the buffer tape wrapping structure includes a disc support, and the disc is rotatably connected to the disc support through a rotating shaft;

[0013] The disc body bracket has a power part, and the power output end of the power part is transmission-connected with the rotating shaft of the disc body and drives the disc body to rotate.

[0014] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheathed cable production device has a cable roller group between two adjacent groups of buffer belt wrapping structures;

[0015] The cable roller group has a U-shaped or V-shaped roller groove, the roller groove of the cable roller group is matched with the through hole of the disc body, and a plurality of rotatably arranged rollers are arranged on the inner wall of the roller groove.

[0016] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheathed cable production device, the adjustable connection mechanism includes a fixed straight rod, an adjustable oblique rod and a tray rod;

[0017] One end of the fixed straight rod is fixed to the tray body, the other end of the fixed straight rod is hinged to the end of the tray rod, and the end of the tray rod away from the fixed straight rod is fixed to the buffer belt tray;

[0018] One end of the adjusting inclined rod is hinged to the middle section of the material tray rod, and the other end of the adjusting inclined rod is hinged to the tray body.

[0019] Optimized, the above-mentioned production device for large-section ultra-high voltage smooth aluminum sheathed cables, the adjusting diagonal rod includes two externally threaded rods and an internally threaded sleeve, the thread rotation directions of the two externally threaded rods are opposite, and the two externally threaded rods are threadedly connected to the internally threaded sleeve from both ends of the internally threaded sleeve respectively.

[0020] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheath cable production device has a support plate and a moving block between the adjusting diagonal rod and the disc body, the support plate is fixed to the disc body and the fixed straight rod is arranged parallel to the support plate;

[0021] The end of the adjusting diagonal rod is hinged with the moving block; a strip through groove is constructed on the support plate, and the length extension direction of the strip through groove is arranged parallel to the fixed straight rod. The moving block moves along the strip through groove and is relatively fixed to the strip through groove by bolts.

[0022] Optimized, the above-mentioned large-section ultra-high voltage smooth aluminum sheathed cable production device has a reel connected to the buffer tape roll in the middle of the buffer tape material tray, the reel passes through the buffer tape material tray and is rotatably connected to the buffer tape material tray;

[0023] The reel is fixedly connected with a large gear after passing through the buffer belt material disc; a small gear 2 is arranged on the surface of the buffer belt material disc facing the disc body, and the small gear 2 is rotationally connected with the buffer belt material disc through a rotating shaft.

[0024] Optimized, in the above-mentioned production device for large-section ultra-high voltage smooth aluminum sheathed cables, the rotating shaft of the second pinion is connected with a damping device, and the damping device is one of a liquid damper, an electromagnetic damper, a viscous damper, and a magnetorheological damper.

[0025] The advantages of the present application are: in the technical solution of the present application, multiple groups of buffer tape wrapping structures are set up, and before the buffer tape reel on one group of buffer tape wrapping structures is used up, full buffer tape reels can be placed in advance on the buffer tape wrapping structures in the stopped state of other groups as reserves, and when the buffer tape reel is used up, the buffer tape on the reserve buffer tape reel is manually connected to the end of the used buffer tape, thereby completing the buffer tape connection without stopping the machine, ensuring better work efficiency, avoiding affecting the subsequent crawler covering welding process, and avoiding the situation where the core wire wrapping specifications are not uniform due to shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of this application;

[0027] Figure 2 for Figure 1 A top view of

[0028] Figure 3 This is a schematic diagram of the structure of the buffer tape wrapping structure of the present application;

[0029] Figure 4 This is a schematic diagram of the structure of the adjustable connection mechanism of the present application;

[0030] Figure 5 This is a schematic diagram of the structure of the buffer belt material tray of the present application. DETAILED DESCRIPTION

[0031] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] As shown in the figure, the present invention discloses a production device for large-section ultra-high voltage smooth aluminum sheathed cables, including a cable pay-off portion and a cable aluminum sheath portion, with a buffer belt wrapping structure between the cable pay-off portion and the cable aluminum sheath portion.

[0033] The cable aluminum sheath part of the present application includes a metal belt device, a metal belt cleaning device, a straightening device, a vertical and tension control device, a metal belt recovery device, a metal belt cutting device, a forming device, a welding aluminum sleeve device, an online detection eddy current flaw detector and a wheel-type reducing device, etc.

[0034] The metal belt device consists of a pay-off stand, a motor, a gear box, a frequency converter, and is equipped with an active transverse unit for loading and centering of different widths. The overall function of the metal belt device is: the pay-off stand pays out the entire roll of aluminum belt for production at a stable and uniform speed longitudinally, the aluminum belt is automatically centered, and the pay-off stand speed is controlled by the frequency converter to control the motor to achieve the speed of the aluminum belt after the diameter is reduced during the pay-off process and the speed increase or decrease of the production line.

[0035] The metal belt cleaning device consists of guide wheels, a water tank, a flushing system, a drying system, etc.

[0036] The metal belt cleaning device cleans the oil and impurities on the surface of the metal belt and dries the moisture on the surface, which is conducive to the good contact between the hot melt material extrusion and the metal pipe surface.

[0037] The cable insulation core guide device is located at the upper part of the overall structure, including a cable tug and a fixing frame, which are used to transport the cable insulation core and fix the cable insulation core respectively to avoid damage or displacement of the cable core. It can be adjusted during production, and the vertical and tension control device includes a double-bracket guide wheel to achieve smooth bending of the belt to achieve closed-loop control.

[0038] The metal strip cutting device consists of two sets of guide wheels, and the position of the props can be adjusted by replacing the mold according to the metal strip width required by the process.

[0039] The metal strip cutting device passes through two sets of left and right press dies. By adjusting the distance between the left and right dies, the metal strip width required by the production process can be cut to make both sides of the metal strip delicate and without burrs.

[0040] The forming device consists of two sets of welding platforms and multiple sets of gradual molds. The welding machine is a double-welding gun longitudinal welder, which is used to weld aluminum strips, so that the aluminum strips gradually change from a flat state to a round state, and finally cover the cable insulation core.

[0041] The forming device gradually forms the flat metal sheet into a circular metal sleeve through a welding platform mold, and the butt joints on both sides of the flat plate are continuously and stably welded by a welding machine.

[0042] The wheel-type reducing device includes a die base with an axial hole and two sets of pressing stations located on both sides of the axial hole. Each pressing station includes four pressing rollers, and the pressing rollers and the wheel grooves that match the aluminum sleeve. When the cable passes through, the reducing device reduces the diameter of the aluminum sleeve to the outer diameter size designed by the process, so that the entire aluminum sleeve can be evenly wrapped on the surface of the wire core.

[0043] The wheel-type reducing device draws the welded metal sheath through a die to make the aluminum tube fit onto the surface of the cable buffer layer, forming good electrical contact. The reducing device has two stages, each consisting of four dies, which reduce the diameter of the aluminum tube in two times at a certain ratio.

[0044] In this process, the insulated wire core is covered with aluminum tape to form a mold through argon arc welding. The aluminum tape seams are welded by argon arc welding to form a whole. This structural cable has the properties of water resistance, thermal expansion and short-circuit current bearing.

[0045] The structure of the cable aluminum sheath part can use the aluminum sheath cable production structure in the prior art, and the corresponding structure can be adjusted during specific production, and the specific structure is subject to production needs. The cable pay-off part can use the existing cable pay-off rack in the prior art, and a wheel pay-off rack can be selected.

[0046] The buffer belt wrapping structure of the present application is provided with a rotatable disk 3, the middle of which has a through hole for the cable to pass through, and the disk 3 is rotatably arranged around the through hole in the middle. The disk 3 is rotatably connected to a disk support 5 via a rotating shaft, and the disk support 5 is placed on the ground to support the rotation of the disk 3.

[0047] The disc support 5 has a power unit, which can be in the form of a motor reducer combination. The power output end of the power unit is transmission-connected to the rotating shaft of the disc 3 and drives the disc 3 to rotate.

[0048] In the technical solution of the present application, at least two groups of buffer tape wrapping structures need to be provided, one group for wrapping and one group for stopping to reserve buffer tape, so that when the buffer tape on the buffer tape wrapping structure in the process of wrapping is exhausted, the buffer tape can be continued without stopping. In order to ensure the wrapping quality, the through holes of the disc body 3 of all buffer tape wrapping structures need to be coaxially arranged.

[0049] The disc body 3 is provided with a plurality of buffer tape material discs 4, which are evenly spaced in a ring shape around the through hole of the disc body 3. Generally, the number of buffer tapes that need to be wrapped around the surface of the cable core wire is three groups, so in the present application, each disc body 3 is provided with at least four buffer tape material discs 4, and one group is reserved for backup.

[0050] An adjustable connection mechanism is provided between the buffer belt material tray 4 and the tray body 3, and the buffer belt material tray 4 and the tray body 3 are arranged at an acute angle through the adjustable connection mechanism. The buffer belt material tray 4 and the ends of the adjustable connection mechanism are relatively fixed.

[0051] Specifically, the adjustable connection mechanism includes a fixed straight rod 7, an adjustable oblique rod 8 and a tray rod 9. One end of the fixed straight rod 7 is fixed to the tray body 3, and the other end of the fixed straight rod 7 is hinged to the end of the tray rod 9. The end of the tray rod 9 away from the fixed straight rod 7 is fixed to the buffer belt tray 4. One end of the adjustable oblique rod 8 is hinged to the middle section of the tray rod 9, and the other end of the adjustable oblique rod 8 is hinged to the tray body 3.

[0052] The adjusting diagonal rod 8 includes two externally threaded rods and an internally threaded sleeve. The threads of the two externally threaded rods are in opposite directions. The two externally threaded rods are respectively threadedly connected to the internally threaded sleeve from both ends. By rotating the internally threaded sleeve, the length of the externally threaded rod extending out and retracting into the internally threaded sleeve can be adjusted, thereby adjusting the length of the adjusting diagonal rod 8. After the length of the adjusting diagonal rod 8 changes, the adjusting diagonal rod 8 pulls or pushes the swing of the material tray rod 9, thereby adjusting the angle between the material tray rod 9 and the fixed straight rod 7, so that the swing of the buffer belt material tray 4 can be realized, and the angle between the buffer belt material tray 4 and the tray body 3 can be adjusted, thereby adjusting the angle of the buffer belt wrapping.

[0053] A support plate 10 and a moving block 11 are provided between the adjusting diagonal rod 8 and the disk body 3. The support plate 10 is fixed to the disk body 3 and the fixed straight rod 7 is arranged parallel to the support plate 10. The end of the adjusting diagonal rod 8 is hinged to the moving block 11. A strip through groove is constructed on the supporting plate 10. The length extension direction of the strip through groove is arranged parallel to the fixed straight rod 7. The moving block 11 moves along the strip through groove and is relatively fixed to the strip through groove by bolts.

[0054] When the moving block 11 moves along the strip-shaped through groove of the support plate 10, the end of the adjusting diagonal rod 8 moves, which will also pull or push the material tray rod 9 to swing, and then adjust the angle between the material tray rod 9 and the fixed straight rod 7. In this way, the buffer belt material tray 4 can be swung, and the angle between the buffer belt material tray 4 and the tray body 3 can be adjusted, thereby adjusting the angle of the buffer belt wrapping.

[0055] The two adjustment methods can meet the needs of large-scale adjustment and fine-tuning, so as to quickly and accurately adjust the wrapping angle.

[0056] A cable roller group 6 is provided between two adjacent groups of buffer belt wrapping structures. The cable roller group 6 has a U-shaped or V-shaped roller groove. The roller groove of the cable roller group 6 is matched with the through hole of the plate body 3. A plurality of rollers are provided on the inner wall of the roller groove. When the cable passes through the two adjacent groups of buffer belt wrapping structures, the cable is supported by the cable roller group 6 in the middle to prevent it from being deformed and drooped.

[0057] The buffer belt material tray 4 has a reel 12 in the middle thereof connected to the buffer belt roll, and the reel 12 passes through the buffer belt material tray 4 and is rotatably connected to the buffer belt material tray 4. The reel 12 is fixedly connected to a large gear 13 after passing through the buffer belt material tray 4; a small gear 2 is arranged on the surface of the buffer belt material tray 4 facing the tray body 3, and the small gear 2 is rotatably connected to the buffer belt material tray 4 through a rotating shaft; a damping device 14 is connected to the rotating shaft of the small gear 2.

[0058] The damping device 14 can provide damping for the rotation of the reel 12 to prevent the buffer belt from rotating too fast due to inertia. The damping device 14 can be selected from one of a liquid damper, an electromagnetic damper, a viscous damper, and a magnetorheological damper. In this embodiment, the damping device 14 is an electromagnetic damper.

[0059] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A device for producing large-section ultra-high voltage smooth aluminum sheathed cables, comprising a cable pay-off section and a cable aluminum sheath section; characterized in that: A buffer tape wrapping structure is provided between the cable unwinding portion and the cable aluminum sheath portion; The buffer belt is arranged to rotate around the wrapping structure. The disk body (3) has a through hole in the middle for the cable to pass through. The disk body (3) is arranged to rotate around the through hole in the middle. The disc body (3) is provided with a plurality of buffer belt material discs (4), and the buffer belt material discs (4) are arranged in a ring shape and at even intervals around the through hole of the disc body (3); An adjustable connection mechanism is provided between the buffer belt material tray (4) and the tray body (3), and the buffer belt material tray (4) and the tray body (3) are arranged at an acute angle via the adjustable connection mechanism.

2. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 1 is characterized in that: At least two groups of buffer tape wrapping structures are provided, and the through holes of the disk bodies (3) of all the buffer tape wrapping structures are coaxially arranged.

3. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 1 is characterized in that: Each tray body (3) is provided with at least four buffer belt material trays (4); The buffer belt material tray (4) is relatively fixed to the end of the adjustable connection mechanism.

4. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 1 is characterized in that: The buffer belt wrapping structure comprises a disc support (5), and the disc (3) is rotatably connected to the disc support (5) via a rotating shaft; The disc body support (5) comprises a power unit, the power output end of which is transmission-connected to the rotating shaft of the disc body (3) and drives the disc body (3) to rotate.

5. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 2 is characterized in that: A cable roller group (6) is provided between two adjacent groups of buffer belt wrapping structures; The cable roller group (6) has a U-shaped or V-shaped roller groove. The roller groove of the cable roller group (6) is arranged in cooperation with the through hole of the disk body (3). The inner wall of the roller groove is provided with a plurality of rotatably arranged rollers.

6. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 2, characterized in that: The adjustable connection mechanism comprises a fixed straight rod (7), an adjustable oblique rod (8) and a tray rod (9); One end of the fixed straight rod (7) is fixed to the tray body (3), the other end of the fixed straight rod (7) is hinged to the end of the tray rod (9), and the end of the tray rod (9) away from the fixed straight rod (7) is fixed to the buffer belt tray (4); One end of the adjusting inclined rod (8) is hinged to the middle section of the material tray rod (9), and the other end of the adjusting inclined rod (8) is hinged to the tray body (3).

7. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 6, characterized in that: The adjusting oblique rod (8) comprises two external thread rods and an internal thread sleeve. The threads of the two external thread rods are in opposite directions. The two external thread rods are respectively threadedly connected to the internal thread sleeve from both ends of the internal thread sleeve.

8. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 6, characterized in that: A support plate (10) and a moving block (11) are provided between the adjusting inclined rod (8) and the disk body (3); the support plate (10) is fixed to the disk body (3) and the fixed straight rod (7) is arranged parallel to the support plate (10); The end of the adjusting diagonal rod (8) is hinged to the moving block (11); a strip-shaped through groove is constructed on the support plate (10), and the length extension direction of the strip-shaped through groove is arranged parallel to the fixed straight rod (7); the moving block (11) moves along the strip-shaped through groove and is fixed relative to the strip-shaped through groove by bolts.

9. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 1, characterized in that: The buffer tape material disc (4) has a reel (12) in the middle thereof connected to the buffer tape roll, and the reel (12) passes through the buffer tape material disc (4) and is rotationally connected to the buffer tape material disc (4); The reel (12) is fixedly connected to a large gear (13) after passing through the buffer belt material disc (4); a second small gear is provided on the surface of the buffer belt material disc (4) facing the disc body (3), and the second small gear is rotationally connected to the buffer belt material disc (4) via a rotating shaft.

10. The device for producing large-section ultra-high voltage smooth aluminum sheathed cables according to claim 9, characterized in that: The rotating shaft of the second pinion gear is connected with a damping device (14), and the damping device (14) is one of a liquid damper, an electromagnetic damper, a viscous damper, and a magnetorheological damper.

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