CN209785627U

CN209785627U - Environment-friendly 27.5KV unidirectional AC cable for railway

Info

Publication number: CN209785627U
Application number: CN201920588796.5U
Authority: CN
Inventors: 狄标峰; 姜一鑫; 王亭; 吴小敏; 周俊
Original assignee: Sinostar Cable Co Ltd
Current assignee: Sinostar Cable Co Ltd
Priority date: 2019-04-27
Filing date: 2019-04-27
Publication date: 2019-12-13
Anticipated expiration: 2029-04-27

Abstract

the utility model relates to an environment-friendly 27.5KV is cable for one-way alternating current railway, it includes the conductor outside is equipped with the conductor shielding layer outside is equipped with the insulating layer outside is equipped with the insulation shielding layer outside is equipped with the semi-conductive bed course outside is equipped with the copper wire shielding layer outside is equipped with the copper strips shielding layer outside is equipped with the area of blocking water the area outside is equipped with the spacer sleeve outside is equipped with fire-retardant area fire-retardant outband outside is equipped with the aluminium silk armor outside is equipped with around the area be equipped with the outer jacket around the area outside. The utility model has the advantages of high and low temperature resistance, corrosion resistance, oil resistance, acid and alkali resistance, low smoke, low toxicity, simple process and the like.

Description

Environment-friendly 27.5KV unidirectional AC cable for railway

Technical Field

The utility model relates to a cable, concretely relates to be applicable to cable for electric railway.

Background

With the rapid rise of railway construction in China, the railway construction method also strives for market share for the country to the outside. It is necessary for manufacturers of cable manufacturing designs to develop and manufacture various new products in an effort for national construction. The China electrified railway will continue to develop at a high speed, and higher requirements are also put forward for the requirements of the supporting facilities of the electrified locomotive.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims at overcoming the not enough among the prior art, provide one kind and have resistant high low temperature, corrosion-resistant, oil resistance, acid and alkali resistance, low cigarette, performance such as low toxicity to it is simple and convenient to have a technology, need not to increase additional equipment, and the energy saving reduces manufacturing cost, shortens the cable for one-way alternating current railway of environment-friendly 27.5KV of characteristics such as delivery date.

The technical scheme is as follows: in order to solve the technical problem, the environment-friendly 27.5KV unidirectional AC railway cable of the utility model comprises a conductor, a conductor shielding layer is arranged outside the conductor, an insulating layer is arranged outside the conductor shielding layer, an insulation shielding layer is arranged outside the insulation layer, the conductor shielding layer, the insulation layer and the insulation shielding layer are formed by cross-linking full-dry type three-layer co-extrusion, a semi-conductive cushion layer is arranged outside the insulating shielding layer, a copper wire shielding layer is arranged outside the semi-conductive cushion layer, a copper strip shielding layer is arranged outside the copper wire shielding layer, a water blocking tape is arranged outside the copper strip shielding layer, an isolation sleeve is arranged outside the water-blocking tape, a flame-retardant tape is arranged outside the isolation sleeve, an aluminum wire armor layer is arranged outside the flame-retardant tape, the aluminum wire armor layer is characterized in that a wrapping tape is arranged outside the aluminum wire armor layer, and an outer protective layer is arranged outside the wrapping tape.

The conductor is formed by stranding drawn copper monofilaments.

The insulating layer is made of cross-linked polyethylene, and the insulation breakdown field strength of the insulating layer is more than or equal to 60 kV/mm.

The isolation sleeve is made of polyethylene.

The aluminum wire armor layer is a non-magnetic aluminum wire armor layer.

The utility model discloses a crosslinked polyethylene insulating material, insulation breakdown field intensity is greater than or equal to 60 kV/mm. Therefore, the cable can withstand an alternating current power frequency voltage test of 110kV/4h without breakdown, the insulated volume resistivity is more than or equal to 1 x 1014, the cable has good electrical performance, the insulated tensile strength is more than or equal to 13.5MPa, the elongation at break is more than or equal to 350%, and the cable has good mechanical performance. The smoke density of the low-smoke low-halogen flame-retardant cable is not less than 30%, the pH value of gas released during combustion is not less than 2.5, and the escape amount of halogen acid gas is not more than 100 mg/g; the smoke density of the low-smoke halogen-free flame-retardant cable is not less than 60%, and the pH value of gas released during combustion is not less than 4.3.

The utility model discloses an overall structure divide into conductive wire core, insulating (including conductor shielding and insulation shield), metallic shield, isolation layer, armor and outer jacket. The processing range comprises single wire drawing, conductor twisting, insulation extrusion (insulation, inner and outer shield three-layer co-extrusion), metal shielding, an extruded isolation layer, metal wire armoring and outer protective layer extrusion.

The utility model discloses a high-quality copper product improves the electric conductive property and the normal use temperature of conductor as conductor material, and it is insulating to adopt the crosslinked polyethylene of high performance, adopts the wire armor to the cable of certain inclination occasionally using. The insulation adopts a full-dry three-layer co-extrusion process, the water-proof tree and the ageing resistance of the cable insulation are obviously improved, and the safety performance of the cable armored by metal wires is greatly improved

Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is:

Firstly, an imported crosslinking full-dry three-layer co-extrusion process is adopted for insulation, the insulating waterproof tree and the ageing resistance are improved, the insulation breakdown field strength is larger than or equal to 60kV/mm, the insulation waterproof tree can withstand an alternating current power frequency voltage test of 110kV/4h without breakdown, the insulation volume resistivity is larger than or equal to 1 x 1014, the insulation waterproof tree has good electrical performance, the insulation tensile strength is larger than or equal to 13.5MPa, the elongation at break is larger than or equal to 350%, and the insulation waterproof tree has good mechanical performance. The smoke density of the low-smoke low-halogen flame-retardant cable is not less than 30%, the pH value of gas released during combustion is not less than 2.5, and the escape amount of halogen acid gas is not more than 100 mg/g; the smoke density of the low-smoke halogen-free flame-retardant cable is not less than 60%, and the pH value of gas released during combustion is not less than 4.3.

Secondly, the development and the use of the low-smoke low-halogen and low-smoke halogen-free flame-retardant sheath material enable the product to meet the requirements of high and low temperature resistance, corrosion resistance, oil resistance, strong acid and alkali resistance, low smoke and low toxicity.

And thirdly, the safety performance of the cable is improved by adopting metal wire armoring.

And fourthly, a polyethylene isolation layer is adopted, so that the cable has longitudinal waterproof performance.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in figure 1, the utility model relates to an environment-friendly 27.5KV unidirectional AC cable for railway, which comprises a conductor 1 formed by twisting drawn copper monofilaments, a conductor shielding layer 2 is arranged outside the conductor 1, an insulating layer 3 is arranged outside the conductor shielding layer 2, the insulating layer 3 is made of crosslinked polyethylene, the insulation breakdown field strength is more than or equal to 60kV/mm, an insulation shielding layer 4 is arranged outside the insulating layer 3, the conductor shielding layer 2, the insulating layer 3 and the insulation shielding layer 4 are formed by cross-linking full-dry three-layer co-extrusion, the insulation adopts an imported cross-linking full-dry three-layer co-extrusion process, the insulation waterproof tree and the ageing resistance are improved, the insulation breakdown field strength is more than or equal to 60kV/mm, the cable can withstand the AC power frequency voltage test of 110kV/4h without breakdown, the volume resistivity of the insulation is more than or equal to 1 x 1014, and has good electrical property, the cable is characterized in that the insulating tensile strength is larger than or equal to 13.5MPa, the elongation at break is larger than or equal to 350%, the cable has good mechanical performance, a semi-conductive cushion layer 5 is arranged outside the insulating shielding layer 4, a copper wire shielding layer 6 is arranged outside the semi-conductive cushion layer 5, a copper strip shielding layer 7 is arranged outside the copper wire shielding layer 6, a water blocking tape 8 is arranged outside the copper strip shielding layer 7, a separation sleeve 9 made of polyethylene is arranged outside the water blocking tape 8, the cable has longitudinal waterproof performance, a flame retardant tape 10 is arranged outside the separation sleeve 9, an aluminum wire armor layer 11 which is a non-magnetic aluminum wire armor layer is arranged outside the flame retardant tape 10, the safety performance of the cable is improved, a wrapping tape 12 is arranged outside the aluminum wire armor layer 11, and an outer protective layer 13 is arranged outside the wrapping tape 12. The smoke density of the low-smoke low-halogen flame-retardant cable is not less than 30%, the pH value of gas released during combustion is not less than 2.5, and the escape amount of halogen acid gas is not more than 100 mg/g; the smoke density of the low-smoke halogen-free flame-retardant cable is not less than 60%, the pH value of gas released during combustion is not less than 4.3, and the development and use of the low-smoke low-halogen and low-smoke halogen-free flame-retardant sheath material enable the product to meet the requirements of high and low temperature resistance, corrosion resistance, oil resistance, strong acid and alkali resistance, low smoke and low toxicity.

The utility model provides a thinking and method, the method and the way of specifically realizing this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements should also be regarded as the utility model discloses a protection range, each component that does not make clear and definite in this embodiment all can be realized with prior art.

Claims

1. An environment-friendly 27.5KV unidirectional AC cable for railways is characterized in that: the cable comprises a conductor (1), a conductor shielding layer (2) is arranged outside the conductor (1), an insulating layer (3) is arranged outside the conductor shielding layer (2), an insulating shielding layer (4) is arranged outside the insulating layer (3), the conductor shielding layer (2), the insulating layer (3) and the insulating shielding layer (4) are formed by cross-linking full-dry three-layer co-extrusion, a semi-conductive cushion layer (5) is arranged outside the insulating shielding layer (4), a copper wire shielding layer (6) is arranged outside the semi-conductive cushion layer (5), a copper strip shielding layer (7) is arranged outside the copper wire shielding layer (6), a water blocking tape (8) is arranged outside the copper strip shielding layer (7), an isolation sleeve (9) is arranged outside the water blocking tape (8), a flame retardant tape (10) is arranged outside the isolation sleeve (9), an aluminum wire armor layer (11) is arranged outside the flame retardant tape (10), a wrapping tape (12) is arranged outside the aluminum wire armor layer (11), and an outer protective layer (13) is arranged outside the wrapping tape (12).

2. The environment-friendly 27.5KV unidirectional alternating current railway cable according to claim 1, wherein: the conductor (1) is formed by stranding drawn copper monofilaments.

3. The environment-friendly 27.5KV unidirectional alternating current railway cable according to claim 1, wherein: the insulating layer (3) is made of cross-linked polyethylene, and the insulation breakdown field strength is more than or equal to 60 kV/mm.

4. The environment-friendly 27.5KV unidirectional alternating current railway cable according to claim 1, wherein: the isolation sleeve (9) is made of polyethylene.

5. The environment-friendly 27.5KV unidirectional alternating current railway cable according to claim 1, wherein: the aluminum wire armor layer (11) is a non-magnetic aluminum wire armor layer.