CN215007663U

CN215007663U - A fire-retardant power cable of one-level for city rail

Info

Publication number: CN215007663U
Application number: CN202121643657.1U
Authority: CN
Inventors: 席娇娜; 冯成; 朱晓斌
Original assignee: Jiangsu Hengtong Wire and Cable Technology Co Ltd
Current assignee: Jiangsu Hengtong Wire and Cable Technology Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-12-03
Anticipated expiration: 2031-07-19

Abstract

The utility model belongs to the field of power cables, in particular to a primary flame-retardant power cable for urban rails, which comprises a conductor and an outer tegument; the conductors are arranged inside the outer tegument and provided with three groups; a flame-retardant protection mechanism is arranged between the conductor and the exterior layer, the flame-retardant protection mechanism comprises a first flame-retardant layer, an insulating layer, a heat-insulating layer, a second flame-retardant layer, a protective layer and a steel wire, the first flame-retardant layer is arranged on the outer side of the conductor, the insulating layer is arranged on the outer side of the first flame-retardant layer, the heat-insulating layer is arranged on the outer side of the insulating layer, the second flame-retardant layer is sleeved on the outer side of the heat-insulating layer, the protective layer is sleeved on the outer side of the second flame-retardant layer, the steel wire is fixedly connected to the outer side of the protective layer, and a positioning connection mechanism is arranged on the outer side of the exterior layer; the flame-retardant protection mechanism is used for protecting the conductor, so that the cable is prevented from being damaged due to external open fire.

Description

A fire-retardant power cable of one-level for city rail

Technical Field

The utility model relates to a power cable field specifically is a fire-retardant power cable of one-level for city rail.

Background

The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and river-crossing and sea-underwater power transmission lines, is widely applied to urban rails, and the transmission capacity of the conventional power cable is greatly improved after long-term improvement.

Most of the existing power cables do not have a flame retardant function, and when the existing power cables are exposed to fire, the existing power cables are easy to burn, so that a power transmission line inside the cable is damaged, and a power failure phenomenon is caused in partial areas; therefore, a primary flame-retardant power cable for urban rails is proposed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to compensate the not enough of prior art, solve current power cable and do not have the problem of fire-retardant function mostly, the utility model provides a fire-retardant power cable of one-level for city rail.

The utility model provides a technical scheme that its technical problem adopted is: the utility model relates to a primary flame-retardant power cable for urban rails, which comprises a conductor and an outer tegument; the conductors are arranged inside the outer tegument and provided with three groups; be provided with fire-retardant protection machanism between conductor and the tegument, fire-retardant protection machanism includes the fire-retardant layer of first fire-retardant layer, insulating layer, second, inoxidizing coating and steel wire, the setting of first fire-retardant layer is in the outside of conductor, the insulating layer sets up the outside on first fire-retardant layer, the insulating layer sets up the outside at the insulating layer, the fire-retardant layer cover of second is established in the outside of insulating layer, the inoxidizing coating cover is established in the fire-retardant layer's of second outside, steel wire fixed connection plays through fire-retardant protection machanism in the outside of inoxidizing coating and protects the conductor, prevents to lead to the cable to receive the damage because of external naked light.

Preferably, the outside of ectonexine is provided with location coupling mechanism, location coupling mechanism includes fixed block, grooving, nest block, constant head tank, locating piece, movable groove and spring, fixed block fixed mounting is at the both ends of conductor one side, the inside at the fixed block is seted up in the grooving, the nest block is inserted and is established the inside in grooving, the constant head tank has all been seted up at the both ends of nest block, locating piece and constant head tank block, the movable groove is seted up in the inside of conductor, and the inside cover in movable groove is equipped with the locating piece, the spring sets up in the inside of movable groove, plays the effect that convenient connection between two sets of cables was fixed a position through location coupling mechanism.

Preferably, first fire-retardant layer adopts the alumina material, and the outside of first fire-retardant layer and conductor is closely laminated, plays the effect that prevents that outer burning from leading to the conductor to expose through the first fire-retardant layer that adopts the alumina material.

Preferably, the insulating layer adopts the rock wool material, and three groups the conductor all sets up in the inside of insulating layer, plays the effect of protecting the conductor through adopting rock wool material insulating layer.

Preferably, the second flame-retardant layer is made of glass fiber, the second flame-retardant layer is arranged between the protective layer and the heat-insulating layer, and the effect of the second flame-retardant layer made of glass fiber is used for improving the overall insulation performance and the heat resistance of the cable.

Preferably, the inoxidizing coating is the rubber material, and the outside winding of inoxidizing coating has the steel wire, plays the effect that strengthens the holistic intensity of cable and shear capacity through the outside winding steel wire at the inoxidizing coating.

Preferably, the locating piece is provided with a connecting groove, one end of a spring is fixedly connected to the inside of the connecting groove, the other end of the spring is fixedly connected to the inside of the movable groove, and the effect of enabling the locating piece to automatically rebound is achieved through the action of the reducing force of the spring.

Preferably, the locating piece is close to the both sides of activity groove one end all fixedly connected with slider, and slider sliding connection is in the inside of spout, the both sides at the activity inslot portion are seted up to the spout, play the effect that makes the locating piece more smooth and easy when removing through the effect of slider and spout combination.

The utility model discloses an useful part lies in:

1. the utility model discloses a first fire-retardant layer, the insulating layer, the fire-retardant layer of second, the structural design of inoxidizing coating and steel wire, realized preventing that the cable from producing the function of burning when the cable meets naked light, play fire-retardant effect through the first fire-retardant layer that adopts the alumina material, the alumina melting point is, the boiling point is, hardness is higher, can effectually protect the conductor, prevent that the outside of conductor from producing the burning because of the naked light and leading to the conductor to expose outside, play to fire-retardant and prevent the impaired effect of conductor to three group's conductors through the insulating layer that adopts the rock wool material, rock wool is an inorganic insulation material, the coefficient of heat conductivity of rock wool that accords with the standard all is less than 0.040W/(m.K), can effectually isolate external temperature, prevent that the inside of insulating layer from producing the burning because of external temperature is too high, play through the effect of the second fire-retardant layer that adopts the glass fiber material and improve the holistic insulating nature of cable, The weather resistance of the cable is improved due to the effects of heat resistance and corrosion resistance, the overall strength of the cable is enhanced by winding the steel wire on the outer side of the protective layer, the cable is prevented from being broken due to impact, the problem that most of the existing power cables do not have a flame retardant function is solved, and the safety and the protective capability of the cable are improved;

2. the utility model discloses a fixed block, the cover groove, the nest block, the constant head tank, the locating piece, the activity groove, a spring, the structural design of slider and spout, realized being convenient for to connect the function of location between two sets of cables, effect through fixed block, the cover groove, the nest block, the constant head tank, the locating piece, the activity groove, a spring, slider and spout combination plays the effect of connecting the location between quick two sets of cables, solved the problem that the current cable that is used for city rail is not convenient for the butt joint mostly, the practicality and the ease of cable have been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic perspective view of a first embodiment;

FIG. 2 is a schematic cross-sectional front view illustrating a structure of the first embodiment;

FIG. 3 is an enlarged schematic view of a portion A of FIG. 2 according to the first embodiment;

FIG. 4 is an enlarged structural diagram of the first embodiment at B in FIG. 3;

FIG. 5 is a schematic side view of a cross-sectional structure according to the first embodiment;

fig. 6 is a schematic structural diagram of a partial front cross section in the second embodiment.

In the figure: 1. a conductor; 21. a first flame retardant layer; 22. an insulating layer; 23. a thermal insulation layer; 24. a second flame retardant layer; 25. a protective layer; 26. a steel wire; 3. a tegument layer; 41. a fixed block; 42. sleeving a groove; 43. sleeving blocks; 44. positioning a groove; 45. positioning blocks; 46. a movable groove; 47. a spring; 48. connecting grooves; 49. a slider; 410. a chute; 411. inserting a block; 412. a slot; 413. and (7) clamping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

Referring to fig. 1-5, a primary flame retardant power cable for urban rails includes a conductor 1 and a jacket layer 3; the conductors 1 are arranged inside the outer tegument 3, and three groups of the conductors 1 are arranged; a flame-retardant protection mechanism is arranged between the conductor 1 and the outer coating 3, the flame-retardant protection mechanism comprises a first flame-retardant layer 21, an insulating layer 22, a heat-insulating layer 23, a second flame-retardant layer 24, a protective layer 25 and a steel wire 26, the first flame-retardant layer 21 is arranged on the outer side of the conductor 1, the insulating layer 22 is arranged on the outer side of the first flame-retardant layer 21, the heat-insulating layer 23 is arranged on the outer side of the insulating layer 22, the second flame-retardant layer 24 is sleeved on the outer side of the heat-insulating layer 23, the protective layer 25 is sleeved on the outer side of the second flame-retardant layer 24, and the steel wire 26 is fixedly connected to the outer side of the protective layer 25; during operation, play fire-retardant effect through the first fire-retardant layer 21 that adopts the aluminium oxide material, it leads to conductor 1 to expose outside to prevent that the outside of conductor 1 from producing the burning because of the naked light, insulating layer 23 through adopting the rock wool material plays to carry out fire-retardant and prevent the impaired effect of conductor 1 to three group's conductors 1, the effect through the second fire-retardant layer 24 that adopts the glass fiber material plays the holistic insulating nature of improvement cable, heat resistance and corrosion resistance's effect, the weather resistance of improvement cable, play the effect of strengthening the holistic intensity of cable through the outside winding steel wire 26 at inoxidizing coating 25, prevent that the cable from receiving the impact and splitting.

The outer side of the tegument layer 3 is provided with a positioning connection mechanism, the positioning connection mechanism comprises a fixed block 41, a sleeve groove 42, a sleeve block 43, a positioning groove 44, a positioning block 45, a movable groove 46 and a spring 47, the fixed block 41 is fixedly arranged at two ends of one side of the conductor 1, the sleeve groove 42 is arranged in the fixed block 41, the sleeve block 43 is inserted in the sleeve groove 42, the positioning groove 44 is arranged at two ends of the sleeve block 43, the positioning block 45 is clamped with the positioning groove 44, the movable groove 46 is arranged in the conductor 1, the positioning block 45 is sleeved in the movable groove 46, and the spring 47 is arranged in the movable groove 46; when the connector is used, when two groups of conductors 1 are connected, the sleeve block 43 is firstly inserted into the sleeve groove 42, the two ends of the sleeve block 43 extrude the positioning blocks 45 when the sleeve block 43 is inserted, the positioning blocks 45 move towards the inside of the movable groove 46 and extrude the spring 47, the spring 47 generates elastic deformation, and after the sleeve block 43 is completely inserted, the positioning blocks 45 restore to the original positions under the action of the restoring force of the spring 47 and are clamped with the positioning grooves 44 to limit the sleeve block 43.

The first flame-retardant layer 21 is made of alumina, and the first flame-retardant layer 21 is tightly attached to the outer side of the conductor 1; when the flame-retardant cable works, the flame is isolated through the first flame-retardant layer 21, the melting point of aluminum oxide is 2054 ℃, the boiling point of aluminum oxide is 2980 ℃, the hardness of the aluminum oxide is higher, and the conductor 1 can be effectively protected.

The heat insulation layer 23 is made of rock wool, and the three groups of conductors 1 are all arranged inside the heat insulation layer 23; during operation, the heat insulation layer 23 made of rock wool plays a role in resisting flame and preventing the conductors 1 of the three groups of conductors 1 from being damaged, the rock wool is an inorganic heat insulation material, the heat conductivity coefficient of the rock wool which meets the standard is lower than 0.040W/(m.K), and the rock wool can effectively insulate the external temperature.

The second flame-retardant layer 24 is made of glass fiber, and the second flame-retardant layer 24 is arranged between the protective layer 25 and the heat insulation layer 23; when the cable works, the second flame-retardant layer 24 made of the glass fiber material is used for improving the insulation, heat resistance and corrosion resistance of the whole cable.

The protective layer 25 is made of rubber, and a steel wire 26 is wound on the outer side of the protective layer 25; during operation, the steel wire 26 is wound on the outer side of the protective layer 25 to enhance the strength of the whole cable, so that the cable is prevented from being broken due to impact.

A connecting groove 48 is formed in the positioning block 45, one end of a spring 47 is fixedly connected to the inside of the connecting groove 48, and the other end of the spring 47 is fixedly connected to the inside of the movable groove 46; during operation, the positioning block 45 automatically rebounds under the action of the reducing force of the spring 47.

Both sides of one end, close to the movable groove 46, of the positioning block 45 are fixedly connected with sliding blocks 49, the sliding blocks 49 are connected inside the sliding grooves 410 in a sliding mode, and the sliding grooves 410 are formed in both sides inside the movable groove 46; during operation, the sliding block 49 and the sliding groove 410 reduce the friction between the positioning block 45 and the inner wall of the movable groove 46, so that the positioning block 45 can move more smoothly.

Example two

Referring to fig. 6, as another embodiment of the present invention, in a first comparative example, an insertion block 411 is fixedly connected to the inside of the sleeve 42, the insertion block 411 is inserted into the insertion slot 412, the insertion slot 412 is disposed on the sleeve 43, two ends of the insertion block 411 close to the center are both fixedly connected with a fixture block 413, and the fixture block 413 is engaged with the insertion slot 412; during operation, the insertion block 411 is inserted into the insertion slot 412 along with the insertion of the sleeve block 43, when the sleeve block 43 moves towards the inside of the sleeve slot 42, the inside of the insertion slot 412 presses the fixture block 413, so that the fixture block 413 generates elastic deformation, and after the sleeve block 43 is completely inserted, the fixture block 413 returns to the original shape under the action of self restoring force and is engaged with the insertion slot 412, so that the function of assisting in fixing the sleeve block 43 is achieved.

The working principle is that the first flame-retardant layer 21 made of alumina plays a flame-retardant role, the melting point of alumina is 2054 ℃, the boiling point of alumina is 2980 ℃, the hardness of alumina is high, the conductor 1 can be effectively protected, the conductor 1 can be prevented from being exposed due to the combustion caused by open fire at the outer side of the conductor 1, the heat-insulating layer 23 made of rock wool plays a role in flame-retarding three groups of conductors 1 and preventing the conductor 1 from being damaged, the rock wool is an inorganic heat-insulating material, the heat conductivity coefficient of rock wool in accordance with the standard is lower than 0.040W/(m.K), the external temperature can be effectively isolated, the combustion caused by the overhigh external temperature in the heat-insulating layer 23 can be prevented, the effect of the second flame-retardant layer 24 made of glass fiber is used for improving the overall insulation, heat resistance and corrosion resistance of the cable, and the weather resistance of the cable can be improved, the steel wire 26 is wound outside the protective layer 25 to enhance the strength of the entire cable, thereby preventing the cable from being broken by impact.

When the two sets of conductors 1 are to be connected, the sleeve block 43 is inserted into the sleeve groove 42, the two ends of the sleeve block 43 extrude the positioning blocks 45 when the sleeve block 43 is inserted, the positioning blocks 45 move towards the inside of the movable groove 46 and extrude the spring 47, the spring 47 generates elastic deformation, and after the sleeve block 43 is completely inserted, the positioning blocks 45 restore to the original positions under the action of the restoring force of the spring 47 and are clamped with the positioning grooves 44 to limit the sleeve block 43.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a fire-retardant power cable of one-level for urban rail which characterized in that: comprises a conductor (1) and a coating layer (3); the conductors (1) are arranged inside the outer layer (3), and three groups of conductors (1) are arranged;

be provided with fire-retardant safeguard mechanism between conductor (1) and tegument (3), fire-retardant safeguard mechanism includes first fire-retardant layer (21), insulating layer (22), insulating layer (23), the fire-retardant layer of second (24), inoxidizing coating (25) and steel wire (26), first fire-retardant layer (21) set up in the outside of conductor (1), insulating layer (22) set up in the outside of first fire-retardant layer (21), insulating layer (23) set up in the outside of insulating layer (22), the outside at insulating layer (23) is established in the fire-retardant layer of second (24) cover, inoxidizing coating (25) cover is established in the outside of the fire-retardant layer of second (24), steel wire (26) fixed connection is in the outside of inoxidizing coating (25).

2. The primary flame retardant power cable for urban rails according to claim 1, wherein: the outside of tegument (3) is provided with location coupling mechanism, location coupling mechanism includes fixed block (41), trepanning (42), cover block (43), constant head tank (44), locating piece (45), activity groove (46) and spring (47), fixed block (41) fixed mounting is at the both ends of conductor (1) one side, the inside at fixed block (41) is seted up in cover groove (42), the inside of establishing in cover groove (42) is inserted in cover block (43), constant head tank (44) have all been seted up at the both ends of cover block (43), locating piece (45) and constant head tank (44) block, the inside at conductor (1) is seted up in activity groove (46), and the inside cover of activity groove (46) is equipped with locating piece (45), spring (47) set up the inside at activity groove (46).

3. The primary flame retardant power cable for urban rails according to claim 2, wherein: the first flame-retardant layer (21) is made of alumina, and the first flame-retardant layer (21) is tightly attached to the outer side of the conductor (1).

4. The primary flame retardant power cable for urban rails according to claim 3, wherein: the heat insulation layer (23) is made of rock wool, and the three groups of conductors (1) are arranged inside the heat insulation layer (23).

5. The primary flame retardant power cable for urban rails according to claim 4, wherein: the second flame-retardant layer (24) is made of glass fiber materials, and the second flame-retardant layer (24) is arranged between the protective layer (25) and the heat insulation layer (23).

6. The primary flame retardant power cable for urban rails according to claim 5, wherein: the protective layer (25) is made of rubber, and a steel wire (26) is wound on the outer side of the protective layer (25).

7. The primary flame retardant power cable for urban rails according to claim 6, wherein: the positioning block (45) is provided with a connecting groove (48), one end of a spring (47) is fixedly connected to the inside of the connecting groove (48), and the other end of the spring (47) is fixedly connected to the inside of the movable groove (46).

8. The primary flame retardant power cable for urban rails according to claim 7, wherein: locating piece (45) are close to both sides of activity groove (46) one end and all fixedly connected with slider (49), and slider (49) sliding connection is in the inside of spout (410), spout (410) are seted up in the inside both sides of activity groove (46).