Novel degassing room for ultra-high voltage cable with large length and large cross section

Abstract

The utility model discloses a novel degassing room for a large-length and large-section ultrahigh-voltage cable, belongs to the field of cable processing equipment, and solves the problem that a degassing room in the prior art is difficult to adapt to the use requirement of the large-length and large-section ultrahigh-voltage cable. According to the application, the enclosure is annular, and the top cover is matched with the opening in the upper end of the enclosure; a ground turntable is arranged in the enclosure and is rotationally arranged in the enclosure; a cylindrical turntable cylinder is arranged in the middle of the ground turntable; a plurality of vent holes are formed in the ground turntable, and a plurality of vent holes II are formed in the side wall of the top of the turntable cylinder; the vent hole is communicated with an air outlet of the hot air supply device; and a cable coiling space is formed between the fence and the turntable cylinder. According to the novel degassing room for the large-length and large-cross-section ultrahigh-voltage cable, cable degassing can be achieved by adopting coiled wire storage, large-length and large-capacity wire storage can also be achieved, and the novel degassing room has multiple purposes.

Description

TECHNICAL FIELD

[0001] The application relates to a novel degassing room for large-length and large-section super-high-voltage cables, and belongs to the cable equipment field. BACKGROUND

[0002] During the extrusion molding of cable insulation materials, by-products such as methane, acetophenone, cumyl alcohol and the like are generated, and the existence of the by-products can reduce the electrical properties of the insulation materials, such as the dielectric constant, the breakdown voltage and the corona resistance, and increase the failure rate of the cables. Cable degassing is a key step in the cable manufacturing process. Through degassing, the by-products generated in the crosslinking process of the insulation can be removed, the internal stress in the insulation core structure can be eliminated, and the electrical properties and service life of the cable can be improved.

[0003] In cable production, the heating degassing method is often used, that is, the insulation core after production is placed in a degassing room at 70+5 DEG C, which can further accelerate the escape of the by-products. Increasing the temperature of the material can reduce the solubility of the gas in the material, promote the gas to precipitate from the material more quickly, and the heating temperature is controlled within a range that will not damage the material structure.

[0004] The traditional degassing room adopts air flow type gas exchange on both sides, which can be used for conventional high-voltage cables, but when the cable is a large-length and large-section super-high-voltage cable, the degassing effect of the conventional degassing room cannot achieve the expected effect. SUMMARY

[0005] The application provides a novel degassing room for large-length and large-section super-high-voltage cables, which adopts a coiled wire storage and can realize cable degassing and large-length and large-capacity wire storage, and has multiple functions.

[0006] The technical scheme adopted by the application is a novel degassing room for large-length and large-section super-high-voltage cables, which comprises a surrounding fence and a top cover, the top cover is arranged on the upper part of the surrounding fence, and the surrounding fence and the top cover form a closed space.

[0007] The novel degassing room for large-length and large-section super-high-voltage cables further comprises a heating and gas supply device;

[0008] The surrounding fence is annular, and the top cover is arranged in cooperation with the upper end opening of the surrounding fence;

[0009] The surrounding fence is annular, and the top cover is arranged in cooperation with the upper end opening of the surrounding fence;

[0010] The ground turntable has a cylindrical turntable column in the middle part;

[0011] A plurality of air holes are arranged on the top part of the sidewall of the turntable column;

[0012] The air holes are in communication with the gas outlet of the heating and gas supply device.

[0013] The cable coiling space is formed between the fence and the rotating disc column.

[0014] The optimized new degassing room for the large-length and large-section super-high voltage cable has a foundation pit below the ground rotating disc.

[0015] The ground rotating disc is a circular disc body, and the rotating disc column is located at the center of the upper surface of the ground rotating disc.

[0016] The ground rotating disc rotates around the disc axis in the foundation pit.

[0017] The optimized new degassing room for the large-length and large-section super-high voltage cable has a driving device between the ground rotating disc and the foundation pit, which drives the ground rotating disc to rotate.

[0018] The driving device comprises a power device, and the side of the ground rotating disc is provided with a driving rack surrounding the ground rotating disc, and the power output end of the power device is connected with the driving rack through a gear transmission.

[0019] The optimized new degassing room for the large-length and large-section super-high voltage cable has a rotating supporting part between the ground rotating disc and the inner bottom end surface of the foundation pit.

[0020] The rotating supporting part comprises an annular track and a sliding body; the annular track is arranged in the annular track, and the sliding body is installed at the bottom of the ground rotating disc and is matched with the annular track.

[0021] The optimized new degassing room for the large-length and large-section super-high voltage cable has a plurality of strip-shaped grooves on the upper surface of the ground rotating disc; the air holes are arranged in the strip-shaped grooves; and the strip-shaped grooves are arranged along the radial direction of the upper surface of the ground rotating disc.

[0022] The technical scheme of the application has the advantages that the object of the application is the large-length and large-section super-high voltage cable, and the coiled storage of the cable not only realizes the degassing of the cable, but also realizes the storage of the large-length and large-capacity cable, and has multiple functions.

[0023] The new degassing room adopts the ground rotating disc mode, can directly collect the extruded super-high voltage insulation core into the wire disc, and due to the large capacity, can help to realize the large-length production of the insulation core. The degassing room adopts the structure with the ground rotating disc air hole, changes the previous two-side degassing mode, and is provided with an air hole at the bottom of the rotating disc, which can ensure that all the inner layers of the wire storage are uniformly heated and degassed to the outside, and can also avoid the problem of internal stress of the insulation core caused by the temperature difference between the inside and the outside. The upper part of the degassing room adopts a dense and telescopic top cover design, which can ensure the good sealing property of the entire degassing room, greatly improves the degassing quality and efficiency of the cable insulation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the application.

[0025] Figure 2 is a top view of the present application; Figure 1

[0026] Figure 3 is a side view of the internal structure of the present application;

[0027] Figure 4 is a top view of the internal structure of the present application. DETAILED DESCRIPTION

[0028] The technical features of the present application will be further described below in combination with the drawings and specific embodiments.

[0029] As shown in the drawings, the present application discloses a new type of degassing room for large length and large section ultra-high voltage cable, which comprises a fence 1 and a top cover 2, the top cover 2 is built on the upper part of the fence 1, and the fence 1 and the top cover 2 enclose a closed space.

[0030] In the present application, the fence 1 is annular, and the top cover 2 is arranged in cooperation with the upper end opening of the fence 1. The fence 1 is spliced by a plurality of heat insulation fence plates into an annular curtain, and the heat insulation fence plates can be industrial heat insulation plates such as foam sandwich color steel plates and hollow aluminum plates.

[0031] The fence 1 has a ground turntable 3 inside, the ground turntable 3 is rotationally arranged in the fence 1, and the ground turntable 3 has a cylindrical turntable column 4 in the middle. An annular cable coiling space is formed between the fence 1 and the turntable column 4. When the cable is degassed, the cable is wound around the turntable column 4 with the turntable column 4 as the core shaft and is supported by the ground turntable 3, forming a flat cable roll. The scheme of the present application has the characteristics of large capacity, which can help to realize large length production of insulated wire cores, and can also realize large length and large capacity wire storage, and has multiple functions.

[0032] A plurality of air holes 301 are arranged on the ground turntable 3, and a plurality of air holes two 401 are arranged on the top side wall of the turntable column 4. The air holes 301 and the air holes two 401 serve as channels for the heating gas supply device 5 to supply heat to the cable coiling space. The air holes 301 are uniformly distributed on the ground turntable 3, and the air holes two 401 can be uniformly distributed around the upper end of the turntable column 4.

[0033] A plurality of strip-shaped grooves 302 are arranged on the upper surface of the ground turntable 3, and the air holes 301 are arranged in the strip-shaped grooves 302. The strip-shaped grooves 302 are arranged along the radial direction of the upper surface of the ground turntable 3. The inner bottom end surface of the strip-shaped groove 302 is lower than the surface of the ground turntable 3, and the air holes 301 are arranged in the strip-shaped grooves 302, which can avoid the cable blocking the air holes 301, so that the air holes 301 can exhaust smoothly.

[0034] ​The structure of the vent hole 301 provided on the ground rotating disc 3 changes the previous two-side degassing mode, and the vent hole provided at the bottom of the rotating disc can ensure that all the inner layers of the stored cable are uniformly degassed to the outside under heat, and can also avoid the problem of stress in the cable core caused by the temperature difference between the inside and outside.

[0035] In this application, a heating air supply device 5 is provided to provide a hot air heat source for cable degassing. In this embodiment, the heating air supply device 5 can use industrial hot air heating equipment such as electromagnetic hot air furnace and high-pressure type hot air generator. The hot air discharge end of the heating air supply device 5 is connected to the vent hole 301 and the second vent hole 401 through a pipeline. The heating air supply device 5 is fixed relative to the ground rotating disc 3 and can be installed at the lower part of the ground rotating disc 3.

[0036] The degassing room of the present application is entirely installed in a foundation pit located below the ground rotating disc 3.

[0037] The ground rotating disc 3 is a circular disc body, and the rotating disc column 4 is located at the center of the upper surface of the ground rotating disc 3.

[0038] The ground rotating disc 3 rotates around the disc axis in the foundation pit. The rotating support form of the ground rotating disc 3 can adopt the form commonly used in the prior art, such as providing a rotating shaft in the middle of the ground rotating disc 3, and the rotating shaft is rotatably installed in the foundation pit through a bearing. In this embodiment, a track support form is adopted. Specifically, the ground rotating disc 3 and the inner bottom end surface of the foundation pit have a rotating supporting part, which includes an annular track and a sliding body. The annular track is arranged in the annular track, and the sliding body is installed at the bottom of the ground rotating disc 3 and cooperates with the annular track. Such a form can provide a better support force for the ground rotating disc 3, so that the ground rotating disc 3 can support a cable with a larger weight.

[0039] The ground rotating disc 3 and the foundation pit have a driving device for driving the ground rotating disc 3 to rotate. The driving device includes a power device 601, and the side of the ground rotating disc 3 has a driving rack arranged around the ground rotating disc 3. The power output end of the power device 601 is connected to the driving rack through a gear transmission.

[0040] In this embodiment, when loading the cable into the degassing room, the top cover 2 is removed, and the ground rotating disc 3 and the enclosure 1 are synchronously rotated. A swing arm for winding the cable in or out is provided above the enclosure 1, and the cable is wound in or out from the swing arm above the enclosure. After the cable degassing is completed, the ground rotating disc 3 can be reversed to facilitate the cable discharge.

[0041] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions or substitutions made by ordinary skilled in the art should be within the scope of protection of the present application.

Claims

1. A new degassing room for large-length and large-section extra-high voltage cables, comprising a surrounding enclosure (1) and a top cover (2) built on the upper part of the surrounding enclosure (1), the surrounding enclosure (1) and the top cover (2) enclosing a closed space; characterized in that: The heating air supply device (5) is further included; The enclosure (1) is annular, and the top cover (2) is arranged in cooperation with the upper end opening of the enclosure (1); The enclosure (1) is provided with a ground rotating disc (3) inside; The ground rotating disc (3) is provided with a cylindrical rotating disc column (4) in the middle part; The ground rotating disc (3) is provided with a plurality of air holes (301), and the top part of the sidewall of the rotating disc column (4) is provided with a plurality of air holes (401). The air holes (301) are communicated with the air outlet of the heating air supply device (5). The cable winding space is formed between the enclosure (1) and the rotating disc column (4).

2. The new degassing chamber for large length and large cross section extra high voltage cables according to claim 1, characterized in that: The ground rotating disc (3) is provided with a foundation pit below; The ground rotating disc (3) is a circular disc body, and the rotating disc column (4) is located at the center of the upper surface of the ground rotating disc (3); The ground rotating disc (3) rotates around the disc axis in the foundation pit.

3. A new degassing chamber for large length and large cross section extra high voltage cables according to claim 2, characterized in that: The ground rotating disc (3) is provided with a driving device between the ground rotating disc (3) and the foundation pit. The driving device includes a power device (601), and the side part of the ground rotating disc (3) is provided with a driving rack around the ground rotating disc (3), and the power output end of the power device (601) is in gear transmission with the driving rack.

4. The new degassing chamber for large length and large cross section EHV cables according to claim 2, characterized in that: The ground rotating disc (3) is provided with a rotating supporting part between the ground rotating disc (3) and the inner bottom end face of the foundation pit. The rotating supporting part includes an annular track and a sliding body; the annular track is arranged in the annular track, and the sliding body is installed on the bottom of the ground rotating disc (3) and arranged in cooperation with the annular track.

5. The new degassing chamber for large length and large cross section EHV cables according to claim 1, characterized in that: The ground rotating disc (3) is provided with a plurality of strip-shaped grooves (302) on the upper surface; the air holes (301) are arranged in the strip-shaped grooves (302). The strip-shaped grooves (302) are arranged along the radial direction of the upper surface of the ground rotating disc (3).

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