Device and method for adjusting embossing depth of corrugated aluminum sheath

Abstract

The invention belongs to the technical field of a production process of a corrugated aluminum sheath extruded and formed by an aluminum extruding machine, and particularly relates to a corrugated aluminum sheath embossing depth adjusting device and a corrugated aluminum sheath embossing depth adjusting method, and the corrugated aluminum sheath embossing depth adjusting device is characterized by comprising an aluminum extruding machine base (1), a fixing ring (2) is arranged on the aluminum extruding machine base (1), at least one through hole is formed in the circumference of the fixing ring (2), and a fine adjustment device (3) is arranged in the through hole. The embossing angle can be adjusted only by rotating the fine adjustment device arranged in the through hole, so that the accurate and stable control of the embossing depth in the process that the aluminum extruding machine continuously produces large-length high-voltage cables for a long time to extrude and form corrugated aluminum sheaths is realized, and the structure is simple, the operation difficulty is low, and the popularization is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of production technology of corrugated aluminum sheath formed by extrusion molding of aluminum extruder, and in particular to a device and method for adjusting corrugation depth of corrugated aluminum sheath. Background Art

[0002] Aluminum extruder is a production equipment for producing extruded aluminum sheaths of high-voltage cables. The production of extruded corrugated aluminum sheaths is to melt the electrical round aluminum rod at high temperature and then extrude a flat aluminum tube through a special machine head and mold. After the flat aluminum tube is cooled and formed, it is corrugated by a corrugator to form a corrugated aluminum tube. At the same time, during this process, the insulating wire core is inserted into the production process to form an extruded corrugated aluminum sheath wire core. Compared with the production process of welding-formed corrugated aluminum sheaths produced by traditional argon arc welding equipment, the aluminum extruder has an important difference that it cannot be stopped midway during the production process. At the same time, there is a high temperature and high pressure state at the machine head, which can easily cause damage to the internal insulating wire core. Therefore, in the production process of extruded corrugated aluminum sheaths, the linkage control of the structural dimensions during the corrugation process is particularly important.

[0003] With the gradual optimization and improvement of the high-voltage cable laying environment and the improvement of construction, installation and laying technology, the supply of single-section long-length high-voltage cables has become an important trend in the industry. In the process of using aluminum extruders to continuously produce long-length high-voltage cables and extruded corrugated aluminum sheaths for a long time, the aluminum wire core will swing back and forth in the circumferential direction during the corrugation process. At the same time, due to the material of the corrugation stabilizing mold, the corrugation mold is prone to deformation after being squeezed for a long time, which can easily cause uneven corrugation depth control in all directions, such as deep on the top and shallow on the bottom, shallow on the left and deep on the right. The control of corrugation depth affects the inner aperture size of the corrugated aluminum tube, and then affects the contact degree between the insulation shielding, semi-conductive buffer layer and aluminum sheath of the high-voltage cable. If the corrugation depth does not meet the process requirements, a potential difference is formed between the metal aluminum sheath and the semi-conductive buffer layer. During the operation of the high-voltage cable, partial discharge will occur due to uneven electric field distribution, which will cause cross-linked polyethylene insulation to form electric dendrites, shortening the life of the high-voltage cable. In severe cases, it will cause insulation breakdown accidents, affecting the safe and stable operation of the power grid.

[0004] Therefore, those skilled in the art are committed to developing a device and method for adjusting the corrugation depth of the corrugated aluminum sheath, so as to accurately and stably control the corrugation depth of the corrugated aluminum sheath. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a device and method for adjusting the corrugation depth of a corrugated aluminum sheath.

[0006] To achieve the above objectives, the present invention provides a corrugated aluminum sheath corrugation depth adjustment device, comprising an aluminum extruder base, on which a fixing ring is provided, the fixing ring having at least one through hole on its circumference, and a micro-adjustment device is provided in the through hole.

[0007] Preferably, the fixing ring comprises an axially extending first support tube, the first support tube is provided with a radially extending limit ring at one end away from the aluminum extruder base, and the limit ring is provided with an axially extending second support tube at one side away from the first support tube.

[0008] Preferably, the micro-adjustment device comprises an adjusting screw, the bottom of which is connected to an adjusting shoe, and the side wall of the adjusting shoe abuts against a limiting ring.

[0009] Preferably, the adjusting screw includes a first screw and a second screw, the axes of the first screw and the second screw coincide, the second screw is provided with a threaded top sleeve at one end away from the first screw, the threaded top sleeve is threadedly connected to the second screw, the threaded top sleeve is provided with an anti-rotation pin at one end away from the second screw, and the anti-rotation pin is engaged with the adjusting screw.

[0010] Preferably, the number of the through holes is four, and the adjacent through holes are vertically arranged, and the through holes are provided with internal threads matched with the first screw rod.

[0011] Preferably, a corrugated stabilizing die is sleeved inside the fixing ring, and an axially extending wire hole is opened on the corrugated stabilizing die.

[0012] Preferably, a radially extending bending plate is provided on the side of the corrugating stabilizing die away from the aluminum extruder base, and the bending plate and the end of the fixing ring away from the aluminum extruder base abut against each other.

[0013] Preferably, a dial is detachably connected to the outside of the fixing ring.

[0014] Preferably, the adjusting shoe is arc-shaped, and the adjusting shoe abuts against the corrugation stabilizing die on the side away from the threaded top sleeve.

[0015] The present invention also provides a method for adjusting the corrugation depth of a corrugated aluminum sheath, comprising the following steps:

[0016] S1. Put a fixing ring on the outside of the aluminum protective wire core;

[0017] S2. Install the micro-adjustment device on the fixed ring;

[0018] S3. Adjust the position of the aluminum wire core by adjusting the micro-adjustment device.

[0019] The beneficial effects of the present invention are as follows: by arranging a micro-adjustment device on the fixed ring, when the aluminum extruder needs to adjust the corrugation angle after long-term continuous production, the micro-adjustment device arranged in the through hole can be rotated to adjust the corrugation angle, thereby realizing accurate and stable control of the corrugation depth during the long-term continuous production of long-length high-voltage cable extrusion molding corrugated aluminum sheath by the aluminum extruder; and the structure is simple, the operation difficulty is low, and it is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0021] Figure 2 It is a front view of a specific embodiment of the present invention.

[0022] Figure 3 yes Figure 2 Schematic diagram of the sectioning mechanism of AA.

[0023] Figure 4 It is a schematic structural diagram of a micro-adjustment device in a specific embodiment of the present invention.

[0024] Figure 5 yes Figure 4 Schematic diagram of the cross-section structure of BB.

[0025] Figure 6 It is a schematic structural diagram of a threaded top sleeve in a specific implementation manner of the present invention.

[0026] 1. Aluminum extruder base; 2. Fixed ring; 21. First support tube; 22. Limit ring; 23. Second support tube; 3. Micro-adjustment device; 31. Adjustment screw; 31a. First screw; 31b. Second screw; 32. Adjustment shoe; 33. Threaded top sleeve; 33a. Anti-rotation pin; 4. Corrugated stabilizing die; 41. Bending plate; 5. Dial; 6. Aluminum wire core. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as limiting the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1-6As shown, a corrugated aluminum sheath corrugation depth adjustment device comprises an aluminum extruder base 1, the aluminum extruder base 1 provides an installation foundation for a fixed ring 2, the fixed ring 2 comprises a first support tube 21 extending axially along the aluminum extruder base 1, the first support tube 21 is provided with a limit ring 22 extending radially along the first support tube 21 at one end away from the aluminum extruder base 1, the limit ring 22 is provided with a second support tube 23 extending axially along the aluminum extruder base 1 at one side away from the first support tube 21, the first support tube 21, the limit ring 22 and the second support tube 23 are integrally formed, a corrugation stabilizing die 4 is sleeved inside the fixed ring 2, the corrugation stabilizing die 4 is provided with an axially extending wire passing hole, and the aluminum wire core 6 is slidably matched with the corrugation stabilizing die 4 The angle of the aluminum wire core 6 can be adjusted by adjusting the angle of the corrugating stabilizing die 4. A radially extending bending plate 41 is provided on the side of the corrugating stabilizing die 4 away from the aluminum extruder base 1. The bending plate 41 and the end of the second support tube 23 away from the limiting ring 22 abut against each other, and support the fixed ring 2. An annular cavity is formed between the first support tube 21 and the corrugating stabilizing die 4. The inner diameter of the second support tube 23 is slightly larger than the outer diameter of the corrugating stabilizing die 4. At least one through hole is opened on the circumference of the first support tube 21. In this embodiment, four through holes are opened, and each adjacent through hole is vertically arranged. In other embodiments, other numbers of through holes, such as 6 or 8, can be selected according to accuracy requirements, and a fine-motion adjustment device 3 is provided in the through hole.

[0029] In this embodiment: the fine-motion adjustment device 3 includes an adjusting screw 31 and an adjusting shoe 32, wherein the adjusting screw 31 includes a first screw 31a and a second screw 31b, the axes of the first screw 31a and the second screw 31b coincide, and the two are integrally formed to ensure strength in use; a threaded top sleeve 33 is provided at one end of the second screw 31b away from the first screw 31a, the threaded top sleeve 33 is threadedly connected to the second screw 31b, and an anti-rotation pin 33a is provided at one end of the threaded top sleeve 33 away from the second screw 31b, the threaded top sleeve 33 is mutually clamped and fixed with the adjusting shoe 32 through the anti-rotation pin 33a. In this embodiment, the adjusting shoe 32 is arc-shaped. By setting the adjusting shoe 32, the point contact between the threaded top sleeve 33 and the corrugated stabilizing mold 4 is converted into surface contact, thereby increasing the force bearing area and improving the service life of the product. In addition, the side wall of the adjusting shoe 32 abuts against the limit ring 22, so that the adjusting shoe 32 and the threaded top sleeve 33 cannot rotate, and can only make up and down reciprocating motion along the second screw rod 31b. The first screw rod 31a is threadedly connected with the through hole set on the first support tube 21, and the through hole is provided with an internal thread matching the first screw rod 31a. When the first screw rod 31a is rotated, the second screw rod 31b rotates synchronously, and the threaded top sleeve 33 and the first screw rod 31a move relative to each other. The threaded top sleeve 33 drives the adjusting shoe 32 to make up and down reciprocating motion along the second screw rod 31b. The diameter of the first screw rod 31a is greater than or equal to the second screw rod 31b. The threaded top sleeve 33 stops ascending when it ascends along the second screw rod 31b to the first screw rod 31a, thereby playing a limiting role and preventing the second screw rod 31b from slipping out of the threaded top sleeve 33.

[0030] In the present embodiment: a dial 5 is detachably connected to the outside of the fixing ring 2. In the present embodiment, the detachable connection is a snap connection. By setting the dial 5, it is convenient to understand the movement distance of the first screw 31a, so as to accurately control the position of the adjusting shoe 32. In other embodiments, the detachable connection can adopt other connection methods such as bonding, threaded connection, etc.

[0031] During use: install the fixing ring 2 onto the aluminum extruder base 1. When the aluminum extruder needs to adjust the corrugation angle after long-term continuous production, it is only necessary to rotate the micro-adjustment device 3 arranged in the through hole to make the adjustment shoe 32 produce corresponding displacement, thereby pushing the corrugation stabilizing die 4 to synchronously displace. For example, when the corrugation depth is deep at the top and shallow at the bottom, loosen the top micro-adjustment device 3. At the same time, tighten the bottom micro-adjustment device 3 accordingly to move the corrugation stabilizing die 4 upward, thereby adjusting the corrugation depth, thereby realizing the precise and stable control of the corrugation depth during the long-term continuous production of long-length high-voltage cable extrusion molding corrugated aluminum sheath by the aluminum extruder. The structure is simple, the operation difficulty is low, and it is easy to promote.

[0032] The present invention also provides a method for adjusting the corrugation depth of a corrugated aluminum sheath, comprising the following steps:

[0033] S1, a fixing ring 2 is sleeved on the outside of the aluminum protective wire core 6;

[0034] S2, installing the fine-motion adjustment device 3 on the fixed ring 2, and the fine-motion adjustment device 3 is arranged at intervals on the circumference of the fixed ring 2;

[0035] S3. Adjust the position of the aluminum protective wire core 6 by adjusting the micro-adjustment device 3.

[0036] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A corrugation depth adjustment device for a corrugated aluminum sheath, characterized in that: It comprises an aluminum extruder base (1), on which a fixing ring (2) is provided. The fixing ring (2) has at least one through hole on its circumference, and a micro-adjustment device (3) is provided in the through hole.

2. The corrugated aluminum sheath corrugation depth adjustment device according to claim 1, characterized in that: The fixing ring (2) comprises an axially extending first support tube (21), the first support tube (21) being provided with a radially extending limiting ring (22) at one end away from the aluminum extruder base (1), and the limiting ring (22) being provided with an axially extending second support tube (23) at one side away from the first support tube (21).

3. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 2, characterized in that: The micro-adjustment device (3) comprises an adjustment screw (31), the bottom of which is connected to an adjustment shoe (32), and the side wall of the adjustment shoe (32) abuts against a limiting ring (22).

4. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 3, characterized in that: The adjusting screw rod (31) comprises a first screw rod (31a) and a second screw rod (31b), wherein the axes of the first screw rod (31a) and the second screw rod (31b) coincide with each other, and a threaded top sleeve (33) is provided at one end of the second screw rod (31b) away from the first screw rod (31a), wherein the threaded top sleeve (33) is threadedly connected to the second screw rod (31b), and an anti-rotation pin (33a) is provided at one end of the threaded top sleeve (33) away from the second screw rod (31b), wherein the anti-rotation pin (33a) is snap-fitted with the adjusting shoe (32).

5. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 4, characterized in that: The through holes are arranged in four numbers, and are vertically arranged between adjacent through holes. The through holes are provided with internal threads matched with the first screw rod (31a).

6. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 1, characterized in that: The fixing ring (2) is internally sleeved with an embossing stabilizing die (4), and the embossing stabilizing die (4) is provided with an axially extending wire-passing hole.

7. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 6, characterized in that: A radially extending bending plate (41) is provided on the side of the corrugating stabilizing die (4) away from the aluminum extruder base (1), and the bending plate (41) and the end of the fixing ring (2) away from the aluminum extruder base (1) are in contact with each other.

8. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 1, characterized in that: The fixed ring (2) is detachably connected to a dial (5).

9. The corrugation depth adjustment device for corrugated aluminum sheath according to claim 4, characterized in that: The adjusting shoe (32) is in an arc shape, and the side of the adjusting shoe (32) away from the threaded top sleeve (33) abuts against the corrugation stabilizing die (4).

10. A method for adjusting the corrugation depth of a corrugated aluminum sheath, characterized in that: The following steps are involved: S1. A fixing ring (2) is mounted on the outside of the aluminum protective wire core; S2. Install a micro-adjustment device (3) on the fixing ring (2); S3. The position of the aluminum protective wire core is adjusted by adjusting the micro-adjusting device (3).

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