阅读说明：本技术 地埋式电缆 (Buried cable ) 是由 陈亚芝 于 2020-03-30 设计创作，主要内容包括：本发明公开了一种地埋式电缆,包括电缆外保护层,电缆外保护层设置有一个电缆安装腔,电缆安装腔内安装电缆芯线,电缆芯线两侧分别设置一中隔片,通过中隔片连接电缆外保护层内壁面,电缆芯线的上下端分别设置一弹性支撑部,弹性支撑部设置在中隔片的上下端,弹性支撑部呈弹性变形状并通过电缆安装腔内壁设置的限位支撑部限位,弹性变形后的弹性支撑部形成的拱形凸面与电缆芯线外侧面接触。本发明的电缆,其采用弹性支撑部作为上下端的弹簧缓冲支撑,增加抗压强度,并在受到大剪切力时利用弹性支撑部包裹在电缆芯线的外部,增加剪切处电缆芯线的强度,并可以在芯线自燃时利用弹性支撑部熄灭火焰,达到防火的目的。(The invention discloses an underground cable which comprises an outer cable protection layer, wherein the outer cable protection layer is provided with a cable installation cavity, a cable core wire is installed in the cable installation cavity, two sides of the cable core wire are respectively provided with a middle spacer, the inner wall surface of the outer cable protection layer is connected through the middle spacers, the upper end and the lower end of the cable core wire are respectively provided with an elastic supporting part, the elastic supporting parts are arranged at the upper end and the lower end of the middle spacer, the elastic supporting parts are in elastic deformation shapes and are limited through limiting supporting parts arranged on the inner wall of the cable installation cavity, and an arched convex surface formed by the elastic supporting parts after elastic deformation is. According to the cable, the elastic supporting parts are used as the spring buffer supports at the upper end and the lower end, so that the compressive strength is increased, the elastic supporting parts are wrapped outside cable core wires when large shearing force is applied, the strength of the cable core wires at the shearing position is increased, flames can be extinguished by the elastic supporting parts when the cable core wires are subjected to spontaneous combustion, and the purpose of fire prevention is achieved.)

1. A buried cable, characterized in that: including the cable overcoat, be provided with a cable installation cavity in the cable overcoat, installation cable conductor in the cable installation cavity, the cable conductor both sides set up spacer in one respectively, through well spacer connecting cable overcoat internal face, the upper and lower end of cable conductor sets up an elastic support portion respectively, the upper and lower end of spacer in the elastic support portion setting, elastic support portion is that elastic deformation shape and spacing supporting part through the setting of cable installation intracavity wall is spacing, the arch convex surface and the contact of cable conductor lateral surface that elastic support portion after the elastic deformation formed.

2. The buried cable of claim 1, wherein: the middle of the arched convex surface formed by the elastic support part after elastic deformation is welded with a positioning sheet, the positioning sheet is arranged on the cable core wire inner protective layer right opposite to the positioning sheet, and the positioning sheet is inserted into the positioning groove and is fixed by glue.

3. The buried cable of claim 1, wherein: the limiting support part comprises a limiting part made of a plastic material, the limiting part is partially buckled into a limiting hole formed in the inner wall surface of the outer cable protection layer, springs are arranged in the limiting holes, and the limiting part is arranged in the limiting holes and fixedly bonded with the outer side surfaces of the springs.

4. The buried cable of claim 3, wherein: the elastic force of the spring is larger than the deformation restoring force of the elastic supporting part.

5. The buried cable of claim 1, wherein: the elastic supporting part is in an arch shape in a natural state, the elastic supporting part is made of elastic metal materials, and the upper and lower end elastic supporting parts are wrapped on the upper and lower surfaces of the cable core wire in the natural state.

6. The buried cable of claim 1, wherein: the inner wall surface of the outer protection layer of the cable is provided with a thickened part facing each elastic supporting part, and a buffer cavity is formed between the thickened part and the elastic supporting part.

7. The buried cable of claim 6, wherein: and a push rod is arranged on the thickened part and close to the position of the limiting support part.

8. The buried cable of claim 1, wherein: the middle spacer is injected and molded together with the cable outer protective layer and the core wire inner protective layer.

Technical Field

The invention relates to the field of cables, in particular to a buried cable.

Background

Buried cable buries underground in the ground, it often can receive shearing and extrusion because of external force, lead to the cable to be destroyed, consequently buried cable generally all designs for armor formula cable, increases the intensity of cable outer protective layer, makes it can bear stronger external force, prevents that external force from causing the destruction to the cable core, but the bearing capacity of this kind of mode is not good, and elasticity shock-absorbing capacity is relatively poor, and outer protective layer is in case impaired moreover, inside heart yearn also can be impaired, resist the effect of external force and not strong. Moreover, the buried cable is integrated with the cable, so that spontaneous combustion is easily caused due to aging of the cable, and the cable is intensively ignited to cause more serious accidents.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a buried cable which has very good anti-shearing and anti-compression buffering capabilities, not only increases the elastic supporting force, but also can perform emergency protection under the action of large shearing force to increase the strength of a core wire, and can perform physical fire extinguishing emergently to prevent further transmission of flame when open fire exists.

The invention is realized by the following technical scheme: the utility model provides a bury formula cable, including the cable overcoat, be provided with a cable installation chamber in the cable overcoat, installation cable conductor in the cable installation chamber, cable conductor both sides set up one well spacer respectively, through well spacer connection cable overcoat internal face, the upper and lower end of cable conductor sets up an elastic support portion respectively, the upper and lower end of elastic support portion setting spacer in, elastic support portion is that the elastic deformation becomes the shape and spacing support portion that sets up through cable installation intracavity wall is spacing, the arch convex surface and the contact of cable conductor lateral surface that elastic support portion after the elastic deformation formed.

As preferred technical scheme, department welding sets up a spacer in the middle of the arch convex surface that elastic support portion after elastic deformation formed, is provided with the constant head tank just on the cable conductor internal protection layer of spacer, and the spacer inserts in the constant head tank and beats the glue and fix.

According to a preferable technical scheme, the limiting support part comprises a limiting part made of a plastic material, the limiting part is partially buckled into a limiting hole formed in the inner wall surface of the outer cable protection layer, springs are filled into the limiting holes, and the limiting part is filled into the limiting holes and fixedly bonded with the outer side surface of each spring.

Preferably, the elastic force of the spring is larger than the deformation restoring force of the elastic support portion.

Preferably, the elastic support part is in an arch shape in a natural state, the elastic support part is made of an elastic metal material, and the upper and lower end elastic support parts are wrapped on the upper and lower surfaces of the cable core in the natural state.

Preferably, a thickened portion is arranged on the inner wall surface of the cable outer protection layer opposite to each elastic supporting portion, and a buffer cavity is formed between the thickened portion and the elastic supporting portion.

Preferably, a top rod is arranged on the thickened part and close to the position of the limit supporting part.

Preferably, the middle spacer, the cable outer protective layer and the core wire inner protective layer are injected and molded together.

The invention has the beneficial effects that: the cable core wire emergency protection device has the advantages that the elastic supporting part is utilized to play an elastic supporting role, and the elastic supporting part can wrap the cable core wire in an emergency state, so that the damage of a large shearing force to the inner core wire is prevented, the purpose of emergency protection of the cable core wire is achieved, and the safety performance of the cable core wire is greatly improved;

when spontaneous combustion occurs in the fire extinguishing device, the limiting supporting part can be damaged by flame, so that the elastic supporting part can restore deformation and cover the cable core wire in an emergency manner, and the cable core wire is covered by the elastic supporting part to extinguish the fire source, thereby achieving the purpose of extinguishing the fire, preventing the transmission of the flame and improving the safety between the cable and the cable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 creative efforts.

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

FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;

fig. 3 is a state diagram of the present invention in use.

Detailed Description

As shown in fig. 1, bury formula cable locally, including cable outer protective layer 11, be provided with a cable installation cavity 5 in the cable outer protective layer 11, installation cable conductor 8 in the cable installation cavity 5, spacer 9 in 8 both sides of cable conductor set up one respectively, 11 internal faces of cable outer protective layer are connected through well spacer 9, the upper and lower end of cable conductor 8 sets up an elastic support portion 4 respectively, elastic support portion 4 sets up the last lower extreme of spacer 9 in, elastic support portion 4 is elastic deformation shape and is spacing through the spacing supporting portion 12 of 5 inner walls settings of cable installation cavity, the arch convex surface that elastic support portion 4 after the elastic deformation formed contacts with 8 lateral surfaces of cable conductor.

Wherein, department's welding sets up a spacer 7 in the middle of the arch convex surface that elastic support portion 4 after the elastic deformation formed, just be provided with the constant head tank on the cable conductor internal protection layer of spacer 7, spacer 7 inserts in the constant head tank and beats glue fixed, spacer 7 and cable conductor 8 that the elastic support portion 4 middle was passed through are fixed together, use this to restore deformation as the setpoint when restoring deformation, ensure that elastic support portion 4 can wrap up in the outside of cable conductor 8 after restoring deformation.

As shown in fig. 2, limiting support portion 12 includes the limiting portion 21 that a plastic material made, limiting portion 21 part is detained in the limiting hole 22 that the cable outer protective layer internal face was seted up, spring 23 has all been packed into in the limiting hole 22, limiting portion 21 packs into in limiting hole 22 and with spring 23 lateral surface fixed bonding, during normal use, elastic support portion can not resume deformation under the effect of limiting support portion, in case the cable top is compressed, utilize top pressure can push open limiting portion, in case limiting portion loses limiting support power, can resume deformation parcel in the outside of cable conductor.

In this embodiment, the elastic force of the spring 23 is larger than the deformation restoring force of the elastic support portion 4, so that the elastic support portion 4 cannot push the stopper portion 21 open by restoring the elastic deformation.

In this embodiment, elastic support portion 4 is arch shape when natural state, elastic support portion 4 adopts elastic metal material to make, elastic support portion 4 of upper and lower extreme parcel is on the upper and lower face of cable conductor when natural state, as shown in fig. 3, elastic support portion 4 resumes deformation and has two kinds of circumstances, one kind is that the condition of pressurized makes its spacing portion of back-opening come to resume deformation, when the second kind of circumstances has external flame, flame destroys spacing portion, and then make elastic support portion resume deformation, consequently when the second kind of circumstances appears, it can wrap up the cable conductor at the very first time, keep apart flame, utilize elastic support portion to reach the mesh of putting out a fire.

In this embodiment, the inner wall surface of the cable outer protection layer 11 is provided with a thickened portion 1 facing each elastic support portion, a buffer cavity 2 is formed between the thickened portion 1 and the elastic support portion 4, and the common extrusion shearing can utilize the buffer cavity as a buffer, so that the common extrusion shearing can be elastically buffered by the elastic support portion 4.

Wherein, be close to the position of spacing supporting part on the thickening portion 1 and be provided with ejector pin 3, mould plastics between mesophragma 9 and cable outer protective layer 11, the heart yearn inner protective layer 6 together, ejector pin 3's effect is when playing the thickening portion pressurized, ejecting elastic support portion's effect.

The invention has the beneficial effects that: the cable core wire emergency protection device has the advantages that the elastic supporting part is utilized to play an elastic supporting role, and the elastic supporting part can wrap the cable core wire in an emergency state, so that the damage of a large shearing force to the inner core wire is prevented, the purpose of emergency protection of the cable core wire is achieved, and the safety performance of the cable core wire is greatly improved;

when spontaneous combustion occurs in the fire extinguishing device, the limiting supporting part can be damaged by flame, so that the elastic supporting part can restore deformation and cover the cable core wire in an emergency manner, and the cable core wire is covered by the elastic supporting part to extinguish the fire source, thereby achieving the purpose of extinguishing the fire, preventing the transmission of the flame and improving the safety between the cable and the cable.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.