阅读说明：本技术 一种电缆接头安全保护装置 (Cable joint safety arrangement ) 是由 邵勇 王超 常爱华 王淑萍 张云峰 于 2020-12-28 设计创作，主要内容包括：本发明提出了一种电缆接头安全保护装置,包括两个端头护罩以及位于所述两个端头护罩中间的扩展护罩,所述端头护罩由相互扣合的上端头护罩和下端头护罩组成；所述扩展护罩是由相互扣合的上扩展护罩和下扩展护罩组成；所述端头护罩与所述扩展护罩之间以及相邻两个所述扩展护罩之间分别通过连接扣槽相互扣合连接；所述端头护罩一侧的端部以及所述扩展护罩的两端分别设有凸筋,所述连接扣槽的两端分别设有凹槽,所述凸筋和凹槽相互扣合连接,所述端头护罩上分别设有填充孔,用于填充有防护材料于安全保护装置内。本发明有效解决了电缆安全保护装置安装转向困难的问题。(The invention provides a cable joint safety protection device, which comprises two end shield covers and an extension shield cover positioned between the two end shield covers, wherein the end shield covers comprise an upper end shield cover and a lower end shield cover which are buckled with each other; the expansion shield consists of an upper expansion shield and a lower expansion shield which are buckled with each other; the end shield and the expansion shields and the adjacent two expansion shields are mutually buckled and connected through connecting buckle grooves respectively; the end protection device is characterized in that protruding ribs are respectively arranged at the end part of one side of the end protection cover and the two ends of the extension protection cover, grooves are respectively arranged at the two ends of the connecting buckling grooves, the protruding ribs and the grooves are mutually buckled and connected, and filling holes are respectively arranged on the end protection cover and used for filling protection materials into the safety protection device. The invention effectively solves the problem that the cable safety protection device is difficult to install and turn.)

1. The cable joint safety protection device is characterized by comprising two end shield shells and an expansion shield shell positioned between the two end shield shells, wherein the end shield shells consist of an upper end shield shell (1) and a lower end shield shell (2) which are mutually buckled; the expansion shield consists of an upper expansion shield (3) and a lower expansion shield (4) which are buckled with each other; the end shield and the expansion shields, and the adjacent two expansion shields are respectively buckled and connected with each other through connecting buckle grooves; the end protection device is characterized in that the end part on one side of the end protection cover and the two ends of the extension protection cover are respectively provided with a convex rib (7), the two ends of the connecting buckle groove are respectively provided with a groove (8), the convex rib (7) and the groove (8) are mutually buckled and connected, and the end protection cover is provided with a filling hole (9) for filling a protection material in the safety protection device.

2. The cable joint safety protection device according to claim 1, wherein the connection catching groove is composed of an upper connection catching groove (5) and a lower connection catching groove (6) which are caught with each other.

3. The cable joint safety protection device of claim 1, wherein the width of the groove (8) is 2-4 times the width of the rib (7).

4. The cable joint safety protection device of claim 1, wherein the side of the connecting buckle slot is provided with an X-shaped steering fixing hole (12).

5. The cable joint safety protection device according to claim 1, wherein a hole plug (10) made of silicon rubber is arranged in the filling hole (9).

6. The cable splice safety arrangement of claim 1, wherein said protective material is fine sand or a dry powder fire retardant.

Technical Field

The invention relates to the technical field of electric power facility protection devices, in particular to a cable joint safety protection device.

Background

With the continuous improvement of urban development planning requirements and industrial automation degree, electric energy gradually becomes a main power source for production and life in the present society, and the cleanness and the high efficiency of electric energy bring great convenience to people. Due to the factors of huge power supply network, complex power supply system, more power supply links, long power supply distance and the like, the use of power cables and cable tunnels is increasing, cable joints become important connection points of the whole power supply network, and the operation stability of the cable joints directly influences the operation quality of the power supply system.

After the cable connector is installed on site, the operation is affected by the surrounding environment, and the breakdown and explosion accidents of the cable connector are caused by the inevitable damage of the insulation caused by external factors such as moisture invasion, mechanical stress and the like. The most serious accident of the power system is the fire disaster in the cable tunnel caused by the explosion of the cable joint. Due to the narrow space of the underground tunnel and the dense cable arrangement, other cables are involved, large-area power failure accidents are caused, irreparable loss is caused to the whole power system, and the power supply reliability is seriously influenced.

Aiming at the problems, the protection measure commonly used by a power supply unit or a construction unit is to use a cable joint box with fireproof, waterproof and explosion-proof functions to carry out all-around protection on a cable joint, the cable joint protection is buckled in a shell, once the cable joint has a breakdown explosion accident, other peripheral electric power facilities can be effectively protected under the protection of the cable joint box, and secondary damage is prevented.

The cable joint box commonly used at present is made of metal or glass fiber reinforced plastic, and the appearance of the product is in a strip column shape without flexible expansion degree. Because the cable is coiled or laid in a cable trench or a cable well, the cable can be distorted and deformed during the construction and laying of the cable intermediate connector, and the cable joint box can not adapt to the distortion and deformation of the cable joint after the construction of the cable intermediate connector is finished because the cable is distorted and deformed in an irregular bending state, and the cable joint can not be effectively buckled in the shell, so that the cable joint box can not be installed or is difficult to install.

Therefore, the cable splice closure commonly used at present is often only used under an ideal state, and slight changes of the field environment can cause that the installation of the cable splice closure is extremely difficult or even impossible, and finally the installation of the cable splice closure is abandoned, so that the installed cable intermediate connector loses due protection, and runs under an unprotected state all the time and threatens the safety of other peripheral electric power facilities and personnel.

Disclosure of Invention

The invention aims to provide a cable joint safety protection device for solving the problems of difficult installation and large use limitation of a cable joint box in the prior art.

The technical scheme for realizing the invention is realized as follows:

a cable joint safety protection device comprises two end shields and an expansion shield positioned between the two end shields, wherein the end shields consist of an upper end shield and a lower end shield which are mutually buckled; the expansion shield consists of an upper expansion shield and a lower expansion shield which are buckled with each other; the end shield and the expansion shields and the adjacent two expansion shields are mutually buckled and connected through connecting buckle grooves respectively; the end protection device is characterized in that the end part of one side of the end protection cover and the two ends of the extension protection cover are respectively provided with a convex rib, the two ends of the connecting buckle groove are respectively provided with a groove, the convex ribs and the grooves are mutually buckled and connected, and the end protection cover is provided with a filling hole for filling a protection material into the safety protection device.

As a preferred technical scheme, the connecting buckle slot consists of an upper connecting buckle slot and a lower connecting buckle slot which are mutually buckled.

As a preferred technical scheme, the width of the groove is 2-4 times of the width of the convex rib.

As a preferred technical scheme, an X-shaped steering fixing hole is formed in the side edge of the connecting buckle slot.

As a preferred technical scheme, a hole plug made of silicon rubber is arranged in the filling hole.

As a preferred technical scheme, the protective material is fine sand stone or dry powder flame retardant.

According to the invention, the connection mode that the convex ribs and the grooves are buckled among the end shield, the connection shield and the connection buckling grooves is adopted, the problem of connection steering is realized by utilizing certain movable gaps of the convex ribs in the grooves, the single-joint steering angle can reach 5 degrees at most, the problem of difficulty in installation and steering of the cable joint safety protection device is effectively solved, the bending deformation of the cable joint is adapted, the application range is wide, and the bending adaptability is high.

The invention can solve the problems of steering abdicating and fastening connection through the X-shaped steering fixing holes on the side edges of the connecting buckle groove.

The expansion shield can freely increase the length of the explosion-proof box, is convenient to install and expand, and can be expanded at a single side or two sides.

The invention adopts a sectional type connection mode, has simple structure, quick and convenient installation, easy transportation and storage of components and strong universality of components, and is suitable for mass production.

The invention effectively protects the cable at the narrow space position and avoids other faults or damages caused by cable joint accidents.

Drawings

FIG. 1 is a schematic view of the cable splice safety arrangement of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the actual field assembly configuration of FIG. 1;

FIG. 4 is an enlarged view of the upper connecting snap groove of FIG. 2;

in the figure:

1. the cable steering fixing device comprises an upper end head shield, 2 a lower end head shield, 3 an upper expanding shield, 4 a lower expanding shield, 5 an upper connecting buckle groove, 6 a lower connecting buckle groove, 7 a convex rib, 8 a groove, 9 a filling hole, 10 a hole plug, 11 a cable, 12 and an X-shaped steering fixing hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

A cable joint safety protection device of the present invention as shown in fig. 1-2, comprises:

the end shield comprises two end shields and an extension shield positioned between the two end shields, wherein the end shields consist of an upper end shield 1 and a lower end shield 2 which are mutually buckled; the expansion shield consists of an upper expansion shield 3 and a lower expansion shield 4 which are mutually buckled; the end shield and the expansion shield as well as the two adjacent expansion shields are respectively buckled and connected with each other through connecting buckle grooves; the end part of one side of the end shield and the two ends of the extension shield are respectively provided with a convex rib 7, the two ends of the connecting buckle groove are respectively provided with a groove 8, the convex ribs 7 and the grooves 8 are mutually buckled and connected, and the end shield is respectively provided with a filling hole 9 for filling a protective material in the cable joint safety protection device.

As a preferred technical scheme, the connecting buckle slot consists of an upper connecting buckle slot 5 and a lower connecting buckle slot 6 which are buckled with each other;

as a preferred technical scheme, the width of the groove 8 is 2-4 times of the width of the rib 7.

As a preferred technical scheme, an X-shaped steering fixing hole 12 is arranged on the side edge of the connecting buckle slot.

As a preferred technical scheme, a hole plug 10 made of silicon rubber is arranged in the filling hole 9, and the protective material is flame retardant material or waterproof material such as fine sand stone or dry powder flame retardant.

As the preferred technical scheme, the end shield is mainly made of 1.0-3.0 mm aluminum-clad zinc plates or stainless steel plates by press film welding.

Wherein, the one end of foretell two end shields all forms the throat through the conical structure of binding off, and the throat cooperates with the cable conductor, detains on the cable conductor.

In addition, the corresponding buckling surface of one half shell of the end shield, the extension shield and the connecting buckling groove is provided with a buckling hole, the corresponding buckling surface of the other half shell is provided with a matched corresponding buckling column, or the corresponding buckling surface of one shell is provided with a buckling hole and/or a buckling column, and the corresponding buckling surface of the other half shell is provided with a matched corresponding buckling column and/or a buckling hole.

Or buckling edges are formed on the corresponding buckling surfaces of the end shield, the extension shield and the half shells of the connecting buckling grooves, and buckling fixing holes are formed on the buckling edges, so that a locking pin or a quick locking piece or a bolt can be conveniently used for passing through the two shells to lock and fix the two shells.

The invention is mainly suitable for the cold and hot shrinkage fireproof, explosion-proof and waterproof functions of a 10-110 kV crosslinked polyethylene power cable with the nominal thickness of 50-630 mm2 and the function of enhancing the protection mechanical stress of the cable intermediate joint.

The working principle of the cable joint safety protection device is as follows:

selecting a proper number of expansion shields according to the actual length requirement of the cable 11 joint to be protected, buckling and connecting the end shield and the expansion shields at the cable 11 joint to be protected through connecting buckle grooves, and buckling the cable 11 joint in the shields; fastening fixing holes on two sides of an upper end shield 1 and a lower end shield 2 which form the end shield are fastened and buckled by bolts, then protective materials such as fine gravel or dry powder flame retardant are filled in the safety protection device through a filling hole 9 on the upper end shield 1, and then the filling hole 9 is plugged by a hole plug 10.

The filling hole 9 and the end shield of the safety protection device can timely release the high-strength pressure inside under the condition that the cable joint breaks down, and the flame-retardant materials such as the fine gravel filled inside can effectively extinguish the arc light caused by the breakdown short circuit in time, so that the purposes of extinguishing flame and reducing the fault range are achieved, the safe operation of other cables nearby is ensured, and the filling hole has the pressure relief guiding effect.

According to the invention, the connection mode that the convex ribs and the grooves are buckled among the end shield, the connection shield and the connection buckling grooves is adopted, the problem of connection steering is realized by utilizing certain movable gaps of the convex ribs in the grooves, the single-joint steering angle can reach 5 degrees at most, the problem of difficulty in installation and steering of the cable safety protection device is effectively solved, the bending deformation of a cable joint is adapted, the application range is wide, and the bending adaptability is high.

The invention can solve the problems of steering abdicating and fastening connection through the X-shaped steering fixing holes on the side edges of the connecting buckle groove. The length of the explosion-proof box can be freely increased by the extension shield, the installation and the extension are convenient, and the single-side extension or the two-side extension can be realized.

The invention adopts a sectional type connection mode, has simple structure, quick and convenient installation, easy transportation and storage of components and strong universality of components, and is suitable for mass production.

The cable in a narrow space is effectively protected, and other faults or injuries caused by cable joint accidents are avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.