Device for 750KV ultrahigh-voltage cable with large insulation thickness

Abstract

The invention discloses a device for a 750KV ultrahigh-voltage large-insulation-thickness cable, belongs to the field of cable processing equipment, and solves the problems that when a mold core of a mold is mounted in the prior art, the mold core is strenuous to mount, is not easy to mount in place, is difficult to tighten and is easy to collide and damage. In the application, the inner mold core is in threaded connection with the end opening of the inner mold core fixing part; when the inner mold core is in threaded connection with the inner mold core fixing part, the inner mold core disassembling and assembling tool is used for screwing the inner mold core and the inner mold core fixing part to rotate relatively; the middle mold core is in threaded connection with an end opening of the middle mold core fixing part; and when the middle mold core is in threaded connection with the middle mold core fixing part, the middle mold core disassembling and assembling tool is used for screwing the middle mold core and the middle mold core fixing part to rotate relatively. According to the device for the 750KV ultrahigh-voltage large-insulation-thickness cable, the disassembly and assembly difficulty is reduced, and collision damage to the inner surface and the outer surface of the mold core can be reduced to a certain extent.

Description

Technical Field

[0001] The invention relates to a 750KV ultra-high voltage cable with large insulation thickness, belonging to the field of cable equipment. Background Art

[0002] Cable tower production line, also known as vertical production workshop or tower, is a kind of equipment specially used for producing high voltage and ultra-high voltage cables. The advantages of this production method are mainly reflected in the following aspects: Improve production efficiency: The tower production workshop can significantly improve production efficiency. It is reported that after formal production, the production efficiency can be increased by 40%. Reduce the influence of earth's gravity on product eccentricity: Tower production can reduce the influence of earth's gravity on product eccentricity, ensuring better product performance. This is especially important when producing high voltage and ultra-high voltage cables, because such cables have extremely high performance requirements. Reduce the investment cost of a single production line: Through the three-dimensional cross-arrangement, the tower production workshop reduces the investment cost of a single production line, and the construction investment cost is also reduced by 50%, which is very beneficial for controlling costs and improving economic benefits2. Solve the problem of difficult control of production eccentricity: The tower production workshop solves the problem of difficult control of production eccentricity of catenary CCV production lines for small-section production of high voltage, ultra-high voltage and ultra-high voltage, ensuring the consistency and reliability of product quality14. In summary, the cable tower production line not only improves production efficiency, but also optimizes product quality and reduces costs through its unique design and production process. For cable manufacturers, this is a very effective production method.

[0003] When using a tower production line to produce 750KV and above ultra-high voltage cables with large insulation thickness, the cable extrusion die head is large in size and weight. When installing the core of the mold, it is laborious and difficult to install in place and tighten. During installation, it is easy to cause damage to the inner and outer surfaces of the core due to bumps and other reasons, affecting the molding quality. Summary of the invention

[0004] The invention provides a 750KV ultra-high voltage cable device with large insulation thickness, which reduces the difficulty of disassembly and assembly and can reduce the collision damage of the inner and outer surfaces of the mold core to a certain extent.

[0005] The technical solution adopted by the present invention is a 750KV ultra-high voltage large insulation thickness cable device, comprising an inner mold core assembly, a middle mold core assembly and a mold sleeve assembly; the inner mold core assembly, the middle mold core assembly and the mold sleeve assembly are sequentially sleeved from the inside to the outside;

[0006] It also includes an inner mold core disassembly tool and a middle mold core disassembly tool;

[0007] The inner mold core assembly includes an inner mold core fixing portion and an inner mold core;

[0008] The middle mold core assembly includes a middle mold core fixing portion and a middle mold core;

[0009] The mold sleeve assembly includes a mold sleeve fixing portion and a mold sleeve;

[0010] The inner mold core is threadedly connected to the end opening of the inner mold core fixing part; when the inner mold core is threadedly connected to the inner mold core fixing part, an inner mold core disassembly tool is used to twist the inner mold core and the inner mold core fixing part to rotate relative to each other;

[0011] The middle mold core is threadedly connected to the end opening of the middle mold core fixing part; when the middle mold core is threadedly connected to the middle mold core fixing part, a middle mold core disassembly tool is used to twist the middle mold core and the middle mold core fixing part for relative rotation.

[0012] Optimized, the above is used for 750KV ultra-high voltage large insulation thickness cable device, the inner mold core fixing part, the middle mold core fixing part, and the mold sleeve fixing part are sleeved in sequence from the inside to the outside;

[0013] The inner mold core, the middle mold core and the mold sleeve are connected in sequence from the inside to the outside.

[0014] Optimized, the above-mentioned 750KV ultra-high voltage large insulation thickness cable device has an inner mold cavity penetrating the inner mold core, and the middle section of the inner wall of the inner mold cavity has a tool head mounting surface;

[0015] The inner mold core disassembly and assembly tool comprises a tool head and a tool rod; the tool head is disc-shaped;

[0016] When using the inner mold core disassembly tool to rotate the inner mold core and the inner mold core fixing part relative to each other, the tool rod one is inserted into the inner mold core through the discharge end of the inner mold core, and the tool head one is pressed tightly against the tool head mounting surface of the inner mold cavity and is installed on the end of the tool rod one by bolts.

[0017] Optimized, the above-mentioned 750KV ultra-high voltage and large insulation thickness cable device has an inner wall of the inner mold cavity with a keyway, the position of the keyway is matched with the tool head mounting surface; the tool head has a key matched with the keyway.

[0018] Optimized, the above-mentioned 750KV ultra-high voltage large insulation thickness cable device, the tool rod member 1 has a rod-shaped portion and a handle, and the outer diameter of the rod-shaped portion of the tool rod member 1 is smaller than the inner diameter of the discharge end of the inner mold core;

[0019] The portion between the tool head mounting surface of the inner wall of the inner mold cavity and the discharge end of the inner mold core is a tapered inner wall of the inner mold extrusion molding.

[0020] Optimized, the above-mentioned 750KV ultra-high voltage large insulation thickness cable device, the middle mold core disassembly tool includes a middle mold disassembly sleeve and a middle mold ejector rod; the end of the middle mold ejector rod is fixed with a mounting plate;

[0021] A positioning cavity with an opening is constructed in the middle mold disassembly sleeve, and the inner side wall of the positioning cavity close to the opening has a circular inclined positioning surface;

[0022] The outer surface of the middle mold core has an annular extrusion surface, and the inclined positioning surface is matched with the extrusion surface;

[0023] After the positioning cavity of the middle mold disassembling sleeve is sleeved on the middle mold core from the discharge end of the middle mold core, the inclined positioning surface is in tight pressure contact with the extrusion surface.

[0024] Optimized, the above-mentioned 750KV ultra-high voltage large insulation thickness cable device, the feed end of the middle mold core has a fitting surface, and the fitting surface is arranged in cooperation with the mounting plate;

[0025] After the positioning cavity of the middle mold disassembly sleeve is sleeved on the middle mold core, the mounting plate is fitted on the fitting surface and the mounting plate and the middle mold disassembly sleeve are fixed by bolts.

[0026] Optimized, the above-mentioned 750KV ultra-high voltage large insulation thickness cable device, the outer surface of the feeding end of the inner mold core has a threaded section, and the end of the inner mold core fixing part has an internal threaded connection part arranged in cooperation with the threaded section of the inner mold core;

[0027] The outer surface of the feeding end of the middle mold core is provided with a thread section, and the end of the fixing part of the middle mold core is provided with an internal thread connection part 2 which is arranged in cooperation with the thread section of the middle mold core.

[0028] Optimized, the above-mentioned 750KV ultra-high voltage and large insulation thickness cable device has a cavity at the end of the mold sleeve fixing part and a mold cover at the open end of the cavity, the mold cover is threadedly connected to the open end of the cavity, and the mold sleeve is installed in the cavity and fixed in the cavity by pressing the mold cover.

[0029] The advantage of the present application is that in the technical solution of the present application, the three parts of the tower mold sleeve are the inner mold core, the middle mold core and the mold sleeve from the inside to the outside, and are assembled to the corresponding mold base using the matching mold removal tools.

[0030] During the assembly process, the difficulty of fixing the mold core to the fixing part is reduced through the structural coordination between the mold core disassembly tool and the mold core. In addition, the connection form between the mold core and the fixing part is changed in the present application. Through the form of threaded connection and press fit, the disassembly tool can be used to achieve a better installation positioning effect and installation accuracy without the need for other positioning methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the inner mold core assembly of the present application;

[0032] Figure 2 This is a schematic structural diagram of the middle mold core assembly of the present application;

[0033] Figure 3 This is a schematic diagram of the structure of the mold sleeve assembly of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the inner mold core of the present application;

[0035] Figure 5 This is a schematic diagram of the structure of the middle mold core of the present application;

[0036] Figure 6 This is a schematic diagram of the structure of the mold sleeve of this application;

[0037] Figure 7 This is a schematic diagram of the structure of the inner mold core disassembly and assembly tool of the present application;

[0038] Figure 8 This is a structural schematic diagram of the middle mold disassembly and assembly sleeve of this application;

[0039] Fig. 9 This is a schematic diagram of the structure of the middle mold ejector rod of the present application;

[0040] Fig.10 This is a schematic diagram of the structure of the mold cover of this application;

[0041] Fig.11 This is a schematic diagram of the structure of the mold cover disassembly and assembly tool of the present application. DETAILED DESCRIPTION

[0042] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] As shown in the figure, the present invention discloses a 750KV ultra-high voltage large insulation thickness cable device, including an inner mold core assembly, a middle mold core assembly and a mold sleeve assembly. Among them, the inner mold core assembly includes an inner mold core fixing portion 101 and an inner mold core 102, the middle mold core assembly includes a middle mold core fixing portion 201 and a middle mold core 202, and the mold sleeve assembly includes a mold sleeve fixing portion 301 and a mold sleeve 302. The inner mold core fixing portion 101, the middle mold core fixing portion 201, and the mold sleeve fixing portion 301 are sequentially sleeved from the inside to the outside. The inner mold core 102, the middle mold core 202, and the mold sleeve 302 are sequentially sleeved from the inside to the outside.

[0044] The outer surface of the feed end of the inner mold core 102 has a threaded section, and the end of the inner mold core fixing part 101 has an internal threaded connection part that is arranged in cooperation with the threaded section of the inner mold core 102. The outer surface of the feed end of the middle mold core 202 has a threaded section, and the end of the middle mold core fixing part 201 has an internal threaded connection part 2 that is arranged in cooperation with the threaded section of the middle mold core 202.

[0045] In the present application, the positioning connection method between the inner mold core 102 and the inner mold core fixing part 101, and between the middle mold core 202 and the middle mold core fixing part 201 is simplified. The inner mold core 102 is threadedly connected to the end opening of the inner mold core fixing part 101, and the middle mold core 202 is threadedly connected to the end opening of the middle mold core fixing part 201.

[0046] When the inner mold core 102 is threadedly connected to the inner mold core fixing portion 101 , an inner mold core disassembly tool is used to screw the inner mold core 102 and the inner mold core fixing portion 101 to achieve relative rotation.

[0047] When the middle mold core 202 is threadedly connected to the middle mold core fixing portion 201 , a middle mold core disassembly tool is used to screw the middle mold core 202 and the middle mold core fixing portion 201 for relative rotation.

[0048] The installation assistance of the disassembly and assembly tool can help promote the relative rotation of the mold core and the fixed part, reducing the difficulty of installation. In addition, through the threaded connection method, during installation, only a small part of the thread needs to be manually screwed on. In the subsequent thread rotation and tightening process, the two adjacent mold cores are not likely to collide with each other, reducing the risk of collision.

[0049] Specifically, the inner mold core 102 has an inner mold cavity penetrating the inner mold core 102 , and the middle section of the inner wall of the inner mold cavity has a tool head mounting surface.

[0050] The inner mold core disassembly tool comprises a tool head 401 and a tool rod 402. The tool head 401 is disc-shaped. When the inner mold core disassembly tool is used to rotate the inner mold core 102 and the inner mold core fixing part 101 relative to each other, the tool rod 402 is inserted into the inner mold core 102 through the discharge end of the inner mold core 102, and the tool head 401 is pressed against the tool head mounting surface of the inner mold cavity and is mounted on the end of the tool rod 402 by bolts.

[0051] The inner wall of the inner mold cavity has a keyway, the position of the keyway is matched with the tool head mounting surface, and the tool head 1 401 has a key matched with the keyway.

[0052] Through the cooperation between the tool head 401 and the keyway of the inner wall of the inner mold cavity, the inner mold core 102 can be assisted in being screwed until it is tightened, saving time and effort.

[0053] The tool rod 1 402 has a rod-shaped portion and a handle. The outer diameter of the rod-shaped portion of the tool rod 1 402 is smaller than the inner diameter of the discharge end of the inner mold core 102. The portion between the tool head mounting surface of the inner wall of the inner mold cavity and the discharge end of the inner mold core 102 is a tapered inner mold extrusion molding inner wall. The tool rod 1 402 has a small diameter, which can avoid bumping against the inner wall of the inner mold core 102 and reduce bumping.

[0054] The middle mold core disassembly and assembly tool comprises a middle mold disassembly and assembly sleeve 501 and a middle mold ejector rod 502 , and a mounting plate 503 is fixed to the end of the middle mold ejector rod 502 .

[0055] A positioning cavity with an opening is constructed in the middle mold disassembly sleeve 501, and the inner side wall of the positioning cavity close to the opening has a circular inclined positioning surface, and the outer surface of the middle mold core 202 has a circular extrusion surface 203, and the inclined positioning surface is arranged in cooperation with the extrusion surface 203. After the positioning cavity of the middle mold disassembly sleeve 501 is sleeved on the middle mold core 202 from the discharge end of the middle mold core 202, the inclined positioning surface is in tight contact with the extrusion surface 203.

[0056] The feeding end of the middle mold core 202 has a fitting surface, which is matched with the mounting plate 503. After the positioning cavity of the middle mold disassembly sleeve 501 is sleeved on the middle mold core 202, the mounting plate 503 is fitted on the fitting surface and bolts are used to fix the mounting plate 503 and the middle mold disassembly sleeve 501.

[0057] After the inclined positioning surface of the middle mold disassembly sleeve 501 is fitted with the extrusion surface 203, the mounting plate 503 is fitted with the fitting surface, and the mounting plate 503 and the middle mold disassembly sleeve 501 are tightened with bolts to relatively fix the mounting plate 503 and the middle mold disassembly sleeve 501. The contact pressure between the inclined positioning surface of the middle mold disassembly sleeve 501 and the extrusion surface 203 generates a large friction, so that the middle mold disassembly sleeve 501 is fixed with the middle mold core 202. When the middle mold core disassembly tool is turned, the middle mold core 202 can be driven to rotate for installation.

[0058] The end of the mold sleeve fixing part 301 has a concave cavity and the open end of the concave cavity has a mold cover 303, the mold cover 303 is threadedly connected to the open end of the concave cavity, and the mold sleeve 302 is installed in the concave cavity and fixed in the concave cavity by pressing the mold cover 303. The mold cover 303 can be disassembled and assembled using its special disassembly and assembly tool.

[0059] During installation, use the middle mold core disassembly tool to rotate the middle mold core onto the mold core seat. The mold core seat of the middle mold core is the middle mold core fixing part 201. Push the insulating material into the seat, install the insulating material channel seat into the head body, determine its correct position and fix it.

[0060] After confirming that the middle mold core and the middle mold core fixing part 201 are fixed tightly, use the inner mold core disassembly tool to push the inner mold core onto the inner mold core seat, which is the inner mold core fixing part 101. Install the inner mold core seat into the insulating material flow channel bushing, adjust the position with the positioning pin, and tighten it evenly. Install the positioning ring on the head housing, adjust it with two adjusting bolts, and tighten the positioning bolts after applying heat-resistant lubricating oil evenly.

[0061] After confirming that the middle mold core and the inner mold core are correctly installed, the bushing is mounted on the front body of the die head and positioned. The bushing is the mold sleeve fixing part 301.

[0062] Use the special disassembly tool of the die sleeve to install the die sleeve 302 into the outer shielding channel, and smoothly install the bushing into the front body of the machine head to prevent damage to the inner surface. Determine its correct position and fix it with a flange or bolts. At the same time, pay attention to the uniform gap between the main body and the front body of the machine head to ensure the alignment of the bolts, and adjust the distance between the die sleeve and the bushing to ensure that it is between 2.0-2.5mm.

[0063] Install the connecting seat of the insulation and shielding channel bushing, the heating connecting pipe, etc. on the machine head. The inner screen, insulation and outer screen will enter the flow channels of each area of ​​the mold base through the connecting seat, evenly spread on the inner wall of the mold base, and be extruded through the mold core mouth under the action of pressure and covered on the conductor core.

[0064] When disassembling, first drain and clean the material, then remove the feed port and other connectors, unscrew the mold sleeve, take out the mold sleeve, loosen the screws that fix the inner mold core seat, pull the inner mold core seat out of the middle mold core bushing, and disassemble the middle mold core in the same way, and remove the bushing of the insulating layer, clean each material channel, and remove the inner mold core and middle mold core from the mold core seat.

[0065] 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 750KV ultra-high voltage and large insulation thickness cable device, comprising an inner mold core assembly, a middle mold core assembly and a mold sleeve assembly; the inner mold core assembly, the middle mold core assembly and the mold sleeve assembly are sequentially sleeved from the inside to the outside; characterized in that: It also includes an inner mold core disassembly tool and a middle mold core disassembly tool; The inner mold core assembly comprises an inner mold core fixing portion (101) and an inner mold core (102); The middle mold core assembly comprises a middle mold core fixing portion (201) and a middle mold core (202); The mold sleeve assembly comprises a mold sleeve fixing portion (301) and a mold sleeve (302); The inner mold core (102) is threadedly connected to the end opening of the inner mold core fixing part (101); when the inner mold core (102) and the inner mold core fixing part (101) are threadedly connected, an inner mold core disassembly tool is used to twist the inner mold core (102) and the inner mold core fixing part (101) to rotate relative to each other; The middle mold core (202) is threadedly connected to the end opening of the middle mold core fixing part (201); when the middle mold core (202) and the middle mold core fixing part (201) are threadedly connected, a middle mold core disassembly tool is used to screw the middle mold core (202) and the middle mold core fixing part (201) for relative rotation.

2. The 750KV ultra-high voltage cable with large insulation thickness according to claim 1 is characterized in that: The inner mold core fixing part (101), the middle mold core fixing part (201), and the mold sleeve fixing part (301) are sleeved in sequence from the inside to the outside; The inner mold core (102), the middle mold core (202), and the mold sleeve (302) are sleeved in sequence from the inside to the outside.

3. The 750KV ultra-high voltage cable with large insulation thickness according to claim 1 is characterized in that: The inner mold core (102) has an inner mold cavity penetrating the inner mold core (102), and the middle section of the inner wall of the inner mold cavity has a tool head mounting surface; The inner mold core disassembly and assembly tool comprises a tool head (401) and a tool rod (402); the tool head (401) is disc-shaped; When the inner mold core disassembly tool is used to rotate the inner mold core (102) and the inner mold core fixing part (101) relative to each other, the tool rod (402) is inserted into the inner mold core (102) through the discharge end of the inner mold core (102), and the tool head (401) is pressed tightly against the tool head mounting surface of the inner mold cavity and is installed on the end of the tool rod (402) by bolts.

4. The 750KV ultra-high voltage cable with large insulation thickness device according to claim 3 is characterized in that: The inner wall of the inner mold cavity has a keyway, and the position of the keyway is matched with the tool head mounting surface; the tool head 1 (401) has a key matched with the keyway.

5. The 750KV ultra-high voltage cable with large insulation thickness device according to claim 3 is characterized in that: The tool rod member 1 (402) has a rod-shaped portion and a handle, and the outer diameter of the rod-shaped portion of the tool rod member 1 (402) is smaller than the inner diameter of the discharge end of the inner mold core (102); The portion between the tool head mounting surface of the inner wall of the inner mold cavity and the discharge end of the inner mold core (102) is a conical inner wall formed by inner mold extrusion.

6. The 750KV ultra-high voltage cable with large insulation thickness according to claim 1 is characterized in that: The middle mold core disassembly and assembly tool comprises a middle mold disassembly and assembly sleeve (501) and a middle mold ejector rod (502); a mounting plate (503) is fixed to the end of the middle mold ejector rod (502); A positioning cavity with an opening is constructed in the middle mold disassembly sleeve (501), and the inner side wall of the positioning cavity close to the opening has a circular inclined positioning surface; The outer surface of the middle mold core (202) has an annular extrusion surface (203), and the inclined positioning surface is arranged in cooperation with the extrusion surface (203); After the positioning cavity of the middle mold disassembly sleeve (501) is sleeved onto the middle mold core (202) from the discharge end of the middle mold core (202), the inclined positioning surface is in tight pressure contact with the extrusion surface (203).

7. The 750KV ultra-high voltage cable with large insulation thickness according to claim 6 is characterized in that: The feeding end of the middle mold core (202) has a fitting surface, and the fitting surface is arranged in cooperation with the mounting plate (503); After the positioning cavity of the middle mold disassembly sleeve (501) is sleeved on the middle mold core (202), the mounting plate (503) is fitted on the fitting surface and bolts are used to fix the mounting plate (503) and the middle mold disassembly sleeve (501).

8. The 750KV ultra-high voltage and large insulation thickness cable device according to claim 1 is characterized in that: The outer surface of the feeding end of the inner mold core (102) has a threaded section, and the end of the inner mold core fixing part (101) has an internal threaded connection part that is arranged in cooperation with the threaded section of the inner mold core (102); The outer surface of the feeding end of the middle mold core (202) has a threaded section, and the end of the middle mold core fixing part (201) has an internal threaded connection part 2 arranged in cooperation with the threaded section of the middle mold core (202).

9. The 750KV ultra-high voltage cable with large insulation thickness according to claim 1, characterized in that: The end of the mold sleeve fixing portion (301) has a concave cavity and the open end of the concave cavity has a mold cover (303), the mold cover (303) is threadedly connected to the open end of the concave cavity, and the mold sleeve (302) is installed in the concave cavity and is pressed and fixed in the concave cavity through the mold cover (303).

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