Flame-retardant B1-level fireproof medium-voltage power cable

Abstract

The utility model discloses a flame-retardant B1-level fireproof medium-voltage power cable, and relates to the technical field of cables. The protective assembly comprises a phase change sheet and an inner copper sleeve, the phase change sheet is fixed on the peripheral side of the inner copper sleeve, the inner protective sleeve is fixed on the inner wall of the inner copper sleeve, the first insulation filler is fixed on the inner wall of the inner protective sleeve, the first insulation sleeve is fixed on the inner wall of the first insulation filler, and the second insulation sleeve is fixed on the inner wall of the second insulation filler. And an insulating filler II is fixed on the inner wall of the insulating sleeve I. According to the utility model, through arranging the protection assembly, the inner protection sleeve, the insulation filling 1 and the insulation filling 2, problems that heat transmission is not fast enough after a medium-voltage power cable is heated, the cable is easy to damage by heating, a plurality of cables are needed for power connection of power connection equipment, and lines are relatively disordered are solved; the medium-voltage power cable has the advantages that after being heated, the medium-voltage power cable is faster in heat transfer, the cable is not easy to damage due to heating, and one cable can be used for separately connecting a plurality of devices.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field, especially a kind of fire -retardant B1 grade fireproof medium voltage power cable. BACKGROUND

[0002] National standard GB8624-2012 divides building material into A grade nonflammable, B1 grade difficultly flammable, B2 grade flammable, B3 grade easily flammable four grades according to combustion performance.The specific content of B1 grade fireproof grade is: B1 grade material is difficult to catch fire in air or under high temperature, not easy to spread soon, and combustion stops immediately when fire source is removed, medium voltage power cable refers to the power cable with rated voltage between 6kV and 35kV, and is widely used in city power distribution, rural power grid, mine power system, rail transit system and other fields.The conductor is usually made of copper or aluminum with good electric conductivity and mechanical strength, but it still has the following disadvantages in actual use:

[0003] After medium voltage power cable is laid, in order to realize the function of flame retardation, usually only heat is transferred through armoring, and after surface is coated with flame-retardant material, heat on cable is not transferred fast enough during operation process, which can easily cause cable to be damaged, and affect the fireproof performance of cable.

[0004] During installation of medium voltage power cable, conductor is directly taken out from cable, one cable corresponds to one power receiving device, and during working process, multiple cables are needed to cooperate with multiple power saving devices, and the line for transmitting electric energy is relatively messy. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of fire -retardant B1 grade fireproof medium voltage power cable, by setting protection component, inner protective sleeve, insulation filling one and insulation filling two, the problem that heat on cable is not transferred fast enough to cause cable to be damaged by heat after medium voltage power cable is heated, and multiple cables are needed for power receiving device to receive power, and line is relatively messy is solved.

[0006] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a kind of flame-retardant B1-grade fireproof medium-voltage power cable, including protection assembly, inner protective sleeve, insulating filling one and insulating filling two, the protection assembly includes phase change sheet and inner copper sleeve, the phase change sheet is fixed on the circumferential side of inner copper sleeve, inner wall of inner copper sleeve is fixed with inner protective sleeve, inner wall of inner protective sleeve is fixed with insulating filling one, the inner wall of insulating filling one is fixed with insulating sleeve one, the inner wall of insulating sleeve one is fixed with insulating filling two, when working, inner protective sleeve is fixed in it by protection assembly, insulating filling one and insulating filling two are fixed in it by inner protective sleeve, it is separated between protection assembly, wire one is fixed in it by insulating filling one, wire two is fixed in it by insulating filling two.

[0008] Further, the protection assembly further includes flame-retardant outer sleeve and outer copper sleeve, the outer surface of the phase change sheet is fixed with the outer copper sleeve, the circumferential side of the outer copper sleeve is fixed with the flame-retardant outer sleeve, when the protection assembly works, the outer copper sleeve cooperates with the inner copper sleeve, and the heat conduction capacity is enhanced under the cooperation of the phase change sheet, and the outer copper sleeve is protected by the flame-retardant outer sleeve.

[0009] Further, the insulating filling one is annularly arrayed and has a fixing hole one, the fixing hole one is fixed with the wire one, and the wire one is annularly arrayed in the insulating filling one.

[0010] Further, the insulating filling two is annularly arrayed and has a fixing hole two, the fixing hole two is fixed with the wire two, and the insulating filling two is fixed with the wire two through the fixing hole two.

[0011] Further, the inner wall of the insulating filling two is fixed with an insulating sleeve two, the inner wall of the insulating sleeve two is fixed with an insulating filling three, and the insulating filling two and the insulating filling three are insulated by the insulating sleeve two.

[0012] Further, the insulating filling three is parallel to the central axis and has a plurality of fixing holes three, the fixing hole three is fixed with the wire three, and the insulating filling three is fixed with the wire three through the fixing hole three.

[0013] The utility model has the following beneficial effects:

[0014] The utility model discloses protection assembly and inner protective sleeve are set up, solve the problem that medium-voltage power cable is heated and heat transfer is not fast enough and is easy to cause cable heat damage, after cable is laid well, at this time, cable is arranged in the position of laying, when fire occurs outside, fire first contacts flame-retardant outer sleeve, and preliminarily flame-retardant through flame-retardant outer sleeve, when heat is transferred to outer copper sleeve, heat is transferred rapidly between outer copper sleeve and inner copper sleeve through the phase change of phase change sheet, so that cable is heated more slowly, reduce the damage of cable received by high-temperature accident such as fire, and the heat resistance of cable is better.

[0015] The utility model discloses through setting up insulating filling one and insulating filling two, solved the power supply equipment power supply need multiple cable, the problem that the line is more disorderly, when cable laying is completed, insulating filling one of cable end part is stripped, and wire one is exposed, and with a group of power supply structure electric connection, insulating filling two of cable end part is stripped, and wire two is exposed, and with a group of power supply structure electric connection, again through insulating filling three is stripped, and wire three is exposed, and with a group of power supply structure electric connection, in the process of cable power transmission, insulating filling one and insulating filling two are further insulated apart through insulating cover one, and insulating filling two and insulating filling three are further insulated apart through insulating cover two, reduce wire one, wire two and wire three between the power transmission interference, make a cable can carry out three equipment power supply, and the power supply line is more simple. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0017] Figure 1 It is a kind of flame-retardant B1 grade fireproof medium voltage power cable assembly structure perspective view;

[0018] Figure 2 It is a kind of protection assembly structure perspective view;

[0019] Figure 3 It is a kind of inner protective sleeve structure perspective view;

[0020] Figure 4 It is a kind of insulating filling one split structure perspective view;

[0021] Figure 5 It is a kind of insulating filling two split structure perspective view.

[0022] Reference signs:

[0023] 1, protection assembly;101, flame-retardant outer sleeve;102, outer copper sleeve;103, phase-change sheet;104, inner copper sleeve;2, inner protective sleeve;3, insulating filling one;301, fixed hole one;302, wire one;303, insulating cover one;4, insulating filling two;401, fixed hole two;402, wire two;403, insulating cover two;404, insulating filling three;405, fixed hole three;406, wire three. DETAILED DESCRIPTION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Embodiment one

[0025] Please refer to Figures 1-4 The present application is a fire-retardant B1-grade fireproof medium-voltage power cable, comprising a protection assembly 1, an inner protective sleeve 2, an insulation filling one 3 and an insulation filling two 4. The protection assembly 1 comprises a phase-change sheet 103 and an inner copper sleeve 104. The inner copper sleeve 104 is fixed with the phase-change sheet 103 on its periphery. The inner copper sleeve 104 is fixed with the inner protective sleeve 2 therein. When the protection assembly 1 is heated, the phase-change sheet 103 generates phase change, which, in cooperation with the inner copper sleeve 104 and the outer copper sleeve 102, transfers heat to a further position on the cable, thereby increasing the fireproof effect of the cable. The inner wall of the inner copper sleeve 104 is fixed with the inner protective sleeve 2. The inner protective sleeve 2 protects the insulation filling one 3, the insulation filling two 4 and the insulation filling three 404. The inner wall of the inner protective sleeve 2 is fixed with the insulation filling one 3. The insulation filling one 3 is fixed with the wire one 302 therein. The inner wall of the insulation filling one 3 is fixed with the insulation sleeve one 303. The insulation sleeve one 303 is fixed with the insulation filling one 3 and the insulation filling two 4 therein. The inner wall of the insulation sleeve one 303 is fixed with the insulation filling two 4. The insulation filling two 4 is fixed with the wire two 402 therein.

[0026] Specifically, the protection assembly 1 further comprises a fire-retardant outer sleeve 101 and an outer copper sleeve 102. The outer copper sleeve 102 is fixed on the outer surface of the phase-change sheet 103. The fire-retardant outer sleeve 101 is fixed on the periphery of the outer copper sleeve 102. The outer copper sleeve 102 is fixed in the fire-retardant outer sleeve 101. The outer copper sleeve 102, in cooperation with the inner copper sleeve 104, transfers heat under the action of the phase-change sheet 103. The fire-retardant outer sleeve 101 prevents fire.

[0027] Further, the insulation filling one 3 is fixed with the wire one 302 in the fixed hole one 301 which is annularly arranged. The wire one 302 is annularly arranged in the insulation filling one 3. The insulation filling one 3 is fixed with the wire one 302 through the fixed hole one 301. The wire one 302 transmits electric energy.

[0028] The operation process of the embodiment is as follows: when working, the cable is laid, and the cable is arranged at the laid position. When a fire occurs outside, the fire first contacts the flame-retardant outer cover 101 and is preliminarily retarded by the flame-retardant outer cover 101. When the heat is transferred to the outer copper cover 102, the heat is rapidly transferred between the outer copper cover 102 and the inner copper cover 104 through the phase change of the phase change sheet 103, so that the cable is heated more slowly, the damage of the cable caused by the fire and other high-temperature accidents is reduced, and the outer copper cover 102 and the inner copper cover 104 provide sufficient electromagnetic shielding for the wire one 302, the wire two 402 and the wire three 406. Specific embodiment two

[0029] Please refer to Figure 1 , 4 , 5, on the basis of the specific embodiment one, the annular array in the insulating filling two 4 is provided with a fixing hole two 401, and each fixing hole two 401 is fixed with a wire two 402. The insulating filling two 4 fixes the wire two 402 through the fixing hole two 401.

[0030] Specifically, the inner wall of the insulating filling two 4 is fixed with an insulating sleeve two 403, and the inner wall of the insulating sleeve two 403 is fixed with an insulating filling three 404. The insulating filling two 4 and the insulating filling three 404 are further insulated by the insulating sleeve two 403.

[0031] Further, a plurality of fixing holes three 405 are provided in the insulating filling three 404 and are parallel to the central axis. Each fixing hole three 405 is fixed with a wire three 406, and the insulating filling three 404 fixes the wire three 406 through the fixing hole three 405.

[0032] The operation process of the embodiment is as follows: when working, the cable is laid, and the cable is arranged at the laid position. When a fire occurs outside, the fire first contacts the flame-retardant outer cover 101 and is preliminarily retarded by the flame-retardant outer cover 101. When the heat is transferred to the outer copper cover 102, the heat is rapidly transferred between the outer copper cover 102 and the inner copper cover 104 through the phase change of the phase change sheet 103, so that the cable is heated more slowly, the damage of the cable caused by the fire and other high-temperature accidents is reduced, and the outer copper cover 102 and the inner copper cover 104 provide sufficient electromagnetic shielding for the wire one 302, the wire two 402 and the wire three 406.

[0033] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific implementation manners described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the entire scope and equivalents thereof.

Claims

1. A fire-retardant B1 class fire resistant medium voltage power cable comprising a protective assembly (1), an inner protective jacket (2), an insulating filling one (3) and an insulating filling two (4), characterized in that: The protection assembly (1) comprises a phase change sheet (103) and an inner copper sleeve (104), the phase change sheet (103) is fixed on the periphery of the inner copper sleeve (104), an inner protection sleeve (2) is fixed on the inner wall of the inner copper sleeve (104), an insulating filling one (3) is fixed on the inner wall of the inner protection sleeve (2), an insulating sleeve one (303) is fixed on the inner wall of the insulating filling one (3), and an insulating filling two (4) is fixed on the inner wall of the insulating sleeve one (303).

2. A flame-retardant B1 class fire resistant medium voltage power cable according to claim 1, characterized in that: The protection assembly (1) further comprises a flame-retardant outer sleeve (101) and an outer copper sleeve (102), the outer copper sleeve (102) is fixed on the outer surface of the phase change sheet (103), and the flame-retardant outer sleeve (101) is fixed on the periphery of the outer copper sleeve (102).

3. A flame-retardant B1 class fire resistant medium voltage power cable according to claim 1, characterized in that: A plurality of fixed holes one (301) are arranged in an annular array in the insulating filling one (3), and a wire one (302) is fixed in each fixed hole one (301).

4. A flame-retardant B1 class fire resistant medium voltage power cable according to claim 1, characterized in that: A plurality of fixed holes two (401) are arranged in an annular array in the insulating filling two (4), and a wire two (402) is fixed in each fixed hole two (401).

5. A flame-retardant B1 class fire resistant medium voltage power cable according to claim 1, characterized in that: An insulating sleeve two (403) is fixed on the inner wall of the insulating filling two (4), and an insulating filling three (404) is fixed on the inner wall of the insulating sleeve two (403).

6. A flame-retardant B1 class fire resistant medium voltage power cable according to claim 5, characterized in that: A plurality of fixed holes three (405) are arranged in the insulating filling three (404) in parallel with the central axis, and a wire three (406) is fixed in each fixed hole three (405).

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