CN214314511U

CN214314511U - Cable grounding box

Info

Publication number: CN214314511U
Application number: CN202120456304.4U
Authority: CN
Inventors: 林培斌
Original assignee: Guangdong Anheng Power Technology Co ltd
Current assignee: Guangdong Anheng Power Technology Co ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-09-28
Anticipated expiration: 2031-03-03

Abstract

The utility model provides a cable grounding box, include the box, be located the inside internal connection structure of box with be located the outside external connection structure of box, install bi-pass insulation support on the box, the external connection structure passes through bi-pass insulation support with internal connection structural connection. The utility model has the advantages that: the installation is simple and convenient, and is with low costs, and sealing performance is good.

Description

Cable grounding box

Technical Field

The utility model relates to an earth box especially relates to a cable earth box.

Background

The grounding box is equipment for limiting the induced voltage and the fault voltage on the metal sheath of the power cable, avoiding the formation of circulation in the sheath and performing grounding treatment on the metal sheath.

The existing grounding box is installed by firstly stripping a cable, inserting the cable into a sealing sleeve to a cable clamp, locking a compression screw and a release screw on the cable clamp, then clamping the cable by using a hose clamp, then sealing the joint of the sealing tube and the cable by using a heat-shrinkable tube, and winding and sealing the port of the heat-shrinkable tube by using a waterproof adhesive tape in a semi-overlapping manner to complete the connection of the cable and the inside.

The existing grounding box has the following defects:

1. installation: the existing grounding box has complicated installation steps, a heat shrinkable tube is sleeved on the grounding box, fire is required to be started, the box body is sealed by manual operation on site, and the process is unstable;

2. cost: the wire clamp and the short copper bar which are connected with the existing grounding box and the grounding cable are high in price; the wire clamp and the short copper bar increase the volume of the box body, so that the cost of the box body is increased, and the occupied area is increased;

3. sealing: the existing grounding box is sealed by a heat-shrinkable tube and a waterproof adhesive tape, and has great influence on construction process, unstable sealing performance and easy failure.

Disclosure of Invention

In order to solve current grounding box sealing performance not good, the installation is more complicated, and is with high costs, and installation process and grounding box performance receive the problem that the human factor influences very much, the utility model provides a cable grounding box.

The utility model provides a cable grounding box, include the box, be located the inside internal connection structure of box with be located the outside external connection structure of box, install bi-pass insulation support on the box, the external connection structure passes through bi-pass insulation support with internal connection structural connection.

As a further improvement of the present invention, the internal connection structure includes an internal conductive element, the internal conductive element is located on the conductive rod of the bi-pass insulating sleeve, the bolt connection is passed through to one end in the box, the internal conductive element is preferably a long-strip-shaped internal copper bar.

As a further improvement of the utility model, the external connection structure includes the threaded connection gold utensil of being made by conductive metal, the one end of threaded connection gold utensil is equipped with the hole, hole and earth cable's sinle silk crimping, the other end of threaded connection gold utensil is equipped with the double-screw bolt, the double-screw bolt with bi-pass insulation support's conducting rod is located one end threaded connection outside the box.

As a further improvement, the external connection structure comprises a compression flange and a terminal insulating sheath, the terminal insulating sheath passes through the compression flange is fixed on the outer sheath of the bi-pass insulating sleeve.

As a further improvement of the present invention, the threaded connection fitting is located within the terminal insulating sheath.

As a further improvement, the one end of terminal insulating sheath is equipped with the draw-in groove, the flange setting is in within the draw-in groove, the other end of terminal insulating sheath is equipped with the reducing step.

As a further improvement, the inside of the terminal insulating sheath is provided with a shielding tube made of a composite conductive material.

As a further improvement, the shielding pipe is horn-shaped, the two ends are all provided with stress curves, and the threaded connection fitting is located inside the shielding pipe.

The utility model also provides an installation method of cable ground box, fasten bolt and sealing washer for the bi-pass insulating sleeve on the box, in order to ensure the leakproofness of box, with the earth cable preliminary treatment, make outside the sinle silk of its tip, with hold-down flange pre-assembly in the draw-in groove of terminal insulating sheath head, and tailor the reducing step of terminal insulating sheath's afterbody according to earth cable's specification size, embolia earth cable with terminal insulating sheath, embolia earth cable's sinle silk to the threaded connection gold utensil, and fasten threaded connection gold utensil and earth cable's sinle silk crimping, then tighten the threaded connection gold utensil on the bi-pass insulating sleeve, align terminal insulating sheath with bi-pass insulating sleeve, mounting bolt on hold-down flange, and through bolt locking terminal insulating sheath and bi-pass insulating sleeve, the terminal insulating sheath is tightened

The utility model has the advantages that: the installation is simple and convenient, and is with low costs, and sealing performance is good.

Drawings

Fig. 1 is a schematic diagram of direct grounding of the cable grounding box of the present invention.

Fig. 2 is the utility model relates to a protection ground connection schematic diagram of cable grounding box.

Fig. 3 is the utility model discloses a bi-pass insulation support's of cable grounding box schematic diagram.

Fig. 4 is the utility model relates to a threaded connection gold utensil's of cable ground connection case schematic diagram.

Fig. 5 is a schematic view of a pressing flange of the cable grounding box of the present invention.

Fig. 6 is a schematic view of the terminal insulating sheath of the cable grounding box of the present invention.

Fig. 7 is an assembly schematic view of the external connection structure of the cable grounding box of the present invention.

Detailed Description

The present invention will be further described with reference to the following description and embodiments.

As shown in fig. 1 to 7, a cable grounding box comprises a box body 1, an internal connection structure 2 located inside the box body 1 and an external connection structure 3 located outside the box body 1, wherein a double-pass insulating sleeve 11 is installed on the box body 1.

The box body 1 is generally made of stainless steel so as to ensure high mechanical property and good sealing property; the internal connecting element is made of a material with excellent conductivity.

A bi-pass insulating sleeve 11 is arranged on the box body 1 and used for communicating the inside and the outside of the grounding box.

The internal connection structure 2 directly connects the strip-shaped internal copper bar 21 on the bi-pass insulating sleeve 11 by using bolts to replace the original wire clamp and the original short copper bar.

The external connection structure 3 replaces the sealing treatment of the original sealing tube and the waterproof tape by using the terminal insulating sheath 32 and the crimping connection fitting.

The external connection structure 3 mainly includes a screw connection fitting 31, a hold-down flange 33, and a terminal insulating sheath 32.

The threaded connection fitting 31 is made of conductive metal, and has a hole 312 at one end for being pressed against the core 41 of the ground cable 4 and a stud 311 at the other end for being threaded with the conductive rod 111 of the two-way insulating sleeve 11.

The hold-down flange 33 is made of metal, and holds down the terminal insulating sheath 32 on the outer sheath 112 of the two-way insulating sleeve 11 by bolts and a snap groove with the terminal insulating sheath 32.

The exterior of the terminal insulating sheath 32 is made of insulating material, one end of the terminal insulating sheath is matched with the bi-pass insulating sleeve 11, and the other end of the terminal insulating sheath is provided with a reducing step 322 which can be cut according to cables with different specifications and sizes. The shielding tube 321 (i.e. the conductive shielding tube) is internally compounded with a conductive material, the shielding tube 321 is horn-shaped, stress curves are designed at two end parts, and the shielding tube 321 is wrapped outside the threaded hardware fitting 31.

The bi-pass insulating sleeve 11 is formed by pouring a conductive rod 111 with threaded holes at two ends and epoxy, the epoxy is poured on the conductive rod 111 to form an outer sheath 112, the outer sheath is tightly pressed and sealed and fixed on the box body 1 by a sealing ring and a bolt, one end of the bi-pass insulating sleeve is externally connected with a threaded connection fitting 31, and one end of the bi-pass insulating sleeve is internally connected with an internal copper bar 21.

The utility model provides a pair of cable grounding box for induced voltage and fault voltage on the restriction power cable metal sheath avoid forming the circulation in the sheath, do the equipment of ground connection processing for the metal sheath. The cable is required to be compact in structure, small in size, convenient and safe to install, has good sealing and mechanical properties after installation, and ensures safe and reliable operation of the cable.

The utility model provides a pair of cable grounding box, its installation as follows:

the two-way insulating sleeve 11 is fastened to the case 1 of the ground tank with bolts and gaskets in advance to ensure the sealability of the case 1. During installation, firstly, the grounding cable 3 is preprocessed, the compression flange 33 is preassembled in a clamping groove at the end part of the terminal insulating sheath 32, then the terminal insulating sheath 32 is sleeved on the grounding cable 4 in advance, the threaded connection hardware fitting 31 is sleeved on a wire core 41 of the grounding cable 4 and is pressed and fastened by a pressing clamp, then the threaded connection hardware fitting 31 is screwed into the bi-pass insulating sleeve 11 for fixing and fastening, finally, the terminal insulating sheath 32 is pulled back to be sleeved on the bi-pass insulating sleeve 11, and the compression flange 33 is locked by a bolt, so that installation is completed.

The utility model provides a pair of cable grounding box has following advantage:

1. the utility model discloses the installation is simple, need not to seal up it with pyrocondensation pipe, waterproof sticky tape at the installation site to solved the potential safety hazard problem of scene with fire, neotype bi-pass sleeve pipe for the grounding box directly links to each other with earth cable, and box sealing performance is good, installation simple process.

2. The utility model discloses the innovation lies in insulating sheath and link fitting cooperation position have designed electrically conductive shielding pipe, has solved link fitting high voltage electrode clearance discharge's problem, has reduced insulating surface electric field intensity, reduces ageing speed.

3. The utility model discloses be connected with bi-pass sleeve pipe and ground cable, subtracted the use of short copper bar and fastener, reduced the box volume simultaneously, reduced the cost of ground connection case.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A cable grounding box, its characterized in that: including the box, be located inside internal connection structure of box and being located the outside external connection structure of box, install the bi-pass insulation support on the box, the external connection structure passes through the bi-pass insulation support with internal connection structure connects, internal connection structure includes inside conductive element, inside conductive element with the bi-pass insulation support is located one end in the box is connected.

2. The cable grounding box of claim 1, wherein: the external connection structure includes the threaded connection gold utensil of being made by conductive metal, the one end of threaded connection gold utensil is equipped with the hole, hole and earth cable's sinle silk crimping, the other end of threaded connection gold utensil is equipped with the double-screw bolt, the double-screw bolt with bi-pass insulation support is located the outer one end threaded connection of box.

3. The cable grounding box of claim 2, wherein: the external connection structure comprises a compression flange and a terminal insulating sheath, and the terminal insulating sheath is fixed on the bi-pass insulating sleeve through the compression flange.

4. A cable grounding box according to claim 3, characterized in that: the threaded connection hardware fitting is located in the terminal insulating sheath.

5. A cable grounding box according to claim 3, characterized in that: one end of the terminal insulating sheath is provided with a clamping groove, the compression flange is arranged in the clamping groove, and the compression flange is in locking connection with the bi-pass insulating sleeve through a bolt.