CN213935700U

CN213935700U - Cable with flame retardant property

Info

Publication number: CN213935700U
Application number: CN202022416251.1U
Authority: CN
Inventors: 余丽娟
Original assignee: Zhejiang Qiaoyang Wire And Cable Co ltd
Current assignee: Zhejiang Qiaoyang Wire And Cable Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-08-10
Anticipated expiration: 2030-10-27

Abstract

The utility model provides a cable with fire retardant property, including outer PE layer and gasbag ring, the inner wall on outer PE layer closely laminates there is the gasbag ring, the inner wall of gasbag ring closely laminates there is the reservoir bed, the inner wall of reservoir bed closely laminates there is fire-retardant layer, the inner wall fixedly connected with connecting plate on fire-retardant layer, the inside opening of connecting plate is provided with the dashpot, the equal fixedly connected with buffer spring in upper and lower end of dashpot inside, the inside embedding of dashpot is provided with the cushion column, the middle part embedding on fire-retardant layer is provided with the protecting tube, the inside embedding of protecting tube is provided with fire-retardant rubber layer, the inside embedding on fire-retardant rubber layer is provided with wired cable core. The utility model discloses possess good fire-retardant and compressive property, can put out a fire to the department of being on fire on outer PE layer automatically, convenient to use more.

Description

Cable with flame retardant property

Technical Field

The utility model relates to a cable technical field especially relates to a cable with fire retardant property.

Background

Cable is a generic term for optical cables, electrical cables, and the like. The cable has many purposes, is mainly used for controlling installation, connecting equipment, transmitting power and other multiple functions, and is a common and indispensable object in daily life. The performance indexes of the cable performance are reflected in the aspects of fire resistance, moisture resistance, explosion resistance, corrosion resistance, temperature performance, expansion performance, tensile strength, elasticity, plasticity, hardness, toughness, fatigue strength and the like besides the self conductivity.

Among them, the requirements for the fire resistance and pressure resistance of the cable are the most strict, according to the statistics of relevant national departments, in the cause of fire, the fire caused by the electric circuit reaches more than 50%, and the cable is mainly arranged underground as the main body of the power circuit, so that the cable is difficult to be well protected, which requires that the cable not only has the capability of resisting the damage of external flame, but also does not have the capability of being damaged.

Mineral fireproof cable like patent number CN201820660800.X among the prior art, including fire resistant mica tape, the inside wall in fire resistant mica tape has cup jointed the plastic-coated aluminum tape, the inside wall in plastic-coated aluminum tape has cup jointed the stranding around the package non-woven fabrics, the stranding has the silica gel insulating layer around the inside wall fixedly connected with of package non-woven fabrics, the conductor has cup jointed in the silica gel insulating layer. The utility model discloses a improve the cable, fire-resistant mica tape has very high insulation, adiabatic performance, and chemical stability is good, and the magnesium oxide flame retardant coating has good alkali resistance and electrical insulation nature under high temperature to make the cable not only have the ability of anti external flame destruction, self also possesses the characteristic that can not produce the flame source in addition. Although the cable does not have the characteristic of generating a fire source, the cable is poor in wear resistance and pressure resistance when buried in the ground, and is easy to break and damage after being used for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a cable with fire retardant property is proposed in order to solve the problem that exists in the above-mentioned technique.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a cable with fire retardant property, includes outer PE layer and gasbag ring, the inner wall on outer PE layer closely laminates and has the gasbag ring, the inner wall of gasbag ring closely laminates and has the reservoir bed, the inner wall on reservoir bed closely laminates and has fire-retardant layer, the inner wall fixedly connected with connecting plate on fire-retardant layer, the inside opening of connecting plate is provided with the dashpot, the equal fixedly connected with buffer spring of the upper and lower end of dashpot inside, the inside embedding of dashpot is provided with the buffering post, the middle part embedding on fire-retardant layer is provided with the protecting tube, the inside embedding of protecting tube is provided with fire-retardant rubber layer, the inside embedding on fire-retardant rubber layer is provided with the cable core.

Preferably, the water storage layer is arranged in the air bag ring, and the inner walls of the water storage layer and the air bag ring are tightly attached to the outer side of the air bag ring.

Preferably, a plurality of air bag rings are nested on the outer side of the flame-retardant layer, and the distance between the air bag rings is 3-5 cm.

Preferably, the buffer column is provided with connecting plates in a nesting manner on one sides far away from and close to the middle part of the protective tube, and the two connecting plates are respectively clung to the inner wall of the flame-retardant layer and the outer wall of the protective tube.

Preferably, the buffer column is matched with a buffer groove in the connecting plate, and the buffer column slides in the buffer groove in the horizontal direction.

Preferably, the number of the buffer columns is 8, and the buffer columns are arranged around the middle part of the protective pipe in a circular ring shape.

Preferably, a plurality of honeycomb-shaped through holes are formed in the flame-retardant rubber layer.

The utility model provides a cable with fire behavior has following beneficial effect:

1. this kind of cable with fire behaviour is through being provided with buffering post and gasbag ring, make when outer PE layer receives the extrusion, the gasbag ring compression of its inner wall is extruded in outer PE layer atress, can cushion the partial power that outer PE layer received through gasbag ring compression, extrude the buffering post through promoting the connecting plate during gasbag ring compression, make the buffering post remove in the dashpot of both ends connecting plate, extrude and tensile buffer spring in the dashpot, extend and extend the power that outer PE layer received through buffer spring and cushion, further improvement the compressive property of device.

2. This kind of cable with fire behaviour is through being provided with the water storage layer for when outer PE layer and gasbag ring are caught fire the in-process accident and are broken, follow-up water storage layer can produce the water inflow after being destroyed and is destroyed the department, carries out automatic putting out to the flame, and fire-retardant layer can prevent that the device is inside to be destroyed, and fire behaviour is better.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the air bag ring of the present invention;

FIG. 3 is a right side cross-sectional view of a partial structure of a middle water storage layer of the present invention;

fig. 4 is a schematic sectional view of a partial structure of a middle bumper according to the present invention.

Illustration of the drawings:

1-outer PE layer, 2-air bag ring, 3-water storage layer, 4-flame retardant layer, 5-connecting plate, 501-buffer tank, 502-buffer spring, 6-buffer column, 7-protective tube, 8-flame retardant rubber layer and 9-cable core.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, a cable with fire retardant property, including outer PE layer 1 and gasbag ring 2, the inner wall of outer PE layer 1 closely laminates gasbag ring 2, the inner wall of gasbag ring 2 closely laminates water reservoir 3, the inner wall of water reservoir 3 closely laminates fire-retardant layer 4, the inner wall fixedly connected with connecting plate 5 of fire-retardant layer 4, the inside opening of connecting plate 5 is provided with dashpot 501, the equal fixedly connected with buffer spring 502 of the upper and lower end of dashpot 501 inside, the inside embedding of dashpot 501 is provided with cushion column 6, the middle part embedding of fire-retardant layer 4 is provided with protective tube 7, the inside embedding of protective tube 7 is provided with fire-retardant rubber layer 8, the inside embedding of fire-retardant rubber layer 8 is provided with cable core 9.

In this embodiment, water storage layer 3 sets up in the inside of gasbag ring 2, and water storage layer 3 and gasbag ring 2's inner wall all hugs closely in the outside of gasbag ring 2, when outer PE layer 1 and gasbag ring 2 when catching fire the in-process accident and breaking, follow-up water storage layer 3 can produce the water inflow after being destroyed and destroyed the department, carries out the automatic extinguishment to the flame, and fire-retardant layer 4 can prevent that the device is inside destroyed, and fire behaviour is better.

In this embodiment, the outside nestification of fire-retardant layer 4 is provided with a plurality of gasbag rings 2, and the interval between gasbag ring 2 is 3-5cm for gasbag ring 2 can extend toward both sides when receiving the extrusion, and gasbag ring 2 is whole to be damaged when can preventing simultaneously that the cable from being cut off.

The gas filled in the air bag ring 2 is carbon dioxide gas.

In this embodiment, the bumping post 6 is kept away from and is close to the equal nested connecting plate 5 that is provided with in one side at 7 middle parts of protective tube, two connecting plates 5 hug closely the inner wall at fire-retardant layer 4 and the outer wall of protective tube 7 respectively, when gasbag ring 2 compresses, extrude bumping post 6 through promoting connecting plate 5, make bumping post 6 remove in the dashpot 501 of both ends connecting plate 5, extrude and the buffer spring 502 in the dashpot 501, extend and extend through buffer spring 502 and cushion the power that outer PE layer 1 received, further improvement the buffering compressive property of device.

In this embodiment, dashpot 501 in bumping post 6 and the connecting plate 5 agrees with mutually, bumping post 6 is the horizontal direction and slides in dashpot 501, when gasbag ring 2 compresses, extrude bumping post 6 through promoting connecting plate 5, make bumping post 6 move in the dashpot 501 of both ends connecting plate 5, buffer spring 502 in extrusion and the tensile dashpot 501, extend and extend through buffer spring 502 and cushion the power that outer PE layer 1 received, further improvement the buffering compressive property of device.

In this embodiment, the quantity of bumping post 6 is 8, and bumping post 6 is the ring form setting around the middle part of protective tube 7 for bumping post 6 can cushion the protection to the power that 4 each faces of fire-retardant layer received.

In this embodiment, the inside of the flame-retardant rubber layer 8 is provided with a plurality of "honeycomb" through holes, so that when the protection pipe 7 is extruded, the flame-retardant rubber layer 8 can extrude the flame-retardant rubber layer 8, and the cable core 9 is prevented from being stressed and damaged by the compression of the flame-retardant rubber layer 8.

The working principle is as follows: when the outer PE layer 1 is extruded, the outer PE layer 1 is pressed by force to compress the air bag ring 2 on the inner wall, partial force on the outer PE layer can be buffered by compressing the air bag ring 2, the buffer column 6 is extruded by pushing the connecting plate 5 when the air bag ring 2 is compressed, so that the buffer posts 6 move into the buffer slots 501 of the connection plates 5 at both ends, press and stretch the buffer springs 502 in the buffer slots 501, the force applied to the outer PE layer 1 is buffered by extending and extending the buffer spring 502, so that the pressure resistance of the device is further improved, when the outer PE layer 1 and the air bag ring 2 are accidentally broken in the process of firing, the air bag ring 2 can play a role in blocking oxygen, the water storage layer 3 can generate water to flow into the broken part after being broken, carry out the automatic extinguishing to the flame, and fire-retardant layer 4 can prevent to install inside by destruction, and fire behaviour is better, and water storage layer 3 can be to the cooling of cable transmission in-process simultaneously.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A cable with flame retardant property comprises an outer PE layer (1) and an air bag ring (2), wherein the inner wall of the outer PE layer (1) is tightly attached with the air bag ring (2), it is characterized in that the inner wall of the air bag ring (2) is tightly attached with a water storage layer (3), the inner wall of the water storage layer (3) is tightly attached with a flame-retardant layer (4), the inner wall of the flame-retardant layer (4) is fixedly connected with a connecting plate (5), a buffer groove (501) is arranged at an inner opening of the connecting plate (5), the upper end and the lower end of the inner part of the buffer groove (501) are fixedly connected with buffer springs (502), a buffer column (6) is embedded in the buffer groove (501), a protective pipe (7) is embedded in the middle of the flame-retardant layer (4), a flame-retardant rubber layer (8) is embedded in the protective tube (7), and a cable core (9) is embedded in the flame-retardant rubber layer (8).

2. The cable with flame retardant property according to claim 1, wherein the water storage layer (3) is arranged inside the airbag ring (2), and the water storage layer (3) and the inner wall of the airbag ring (2) are tightly attached to the outer side of the airbag ring (2).

3. The cable with flame retardant property according to claim 1, characterized in that a plurality of air bag rings (2) are nested outside the flame retardant layer (4), and the distance between the air bag rings (2) is 3-5 cm.

4. The cable with flame retardant property according to claim 1, wherein the buffer column (6) is provided with connecting plates (5) at one side far away from and close to the middle part of the protective tube (7) in a nested manner, and the two connecting plates (5) are respectively clung to the inner wall of the flame retardant layer (4) and the outer wall of the protective tube (7).

5. The cable with flame retardant property according to claim 1, wherein the buffer post (6) is engaged with a buffer groove (501) in the connection plate (5), and the buffer post (6) is slid in the buffer groove (501) in a horizontal direction.

6. The cable with flame retardant property according to claim 1, wherein the number of the buffer posts (6) is 8, and the buffer posts (6) are arranged in a circular ring shape around the middle of the protective tube (7).

7. The cable with flame retardant property according to claim 1, characterized in that the flame retardant rubber layer (8) is internally provided with a plurality of "honeycomb" through holes.