CN211456460U

CN211456460U - Connecting structure for large-current gas-filled cabinet

Info

Publication number: CN211456460U
Application number: CN202020101722.7U
Authority: CN
Inventors: 刘心法; 仝志红
Original assignee: Tianjin Woerfar Electric Equipment Co ltd
Current assignee: Tianjin Woerfar Electric Equipment Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-09-08
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses a connecting structure for a heavy current gas-filled cabinet, which comprises a gas-filled cabinet shell, a socket, a capacitance type insulated bus, a protective shell and a stress body; the capacitive insulation bus comprises a tubular conductor, an insulation layer and a grounding shielding layer which are arranged from inside to outside, the insulation layer is provided with a plurality of layers of voltage-sharing capacitance screens, and the tail end of the tubular conductor is provided with a conductive contact which is electrically connected with a socket; the socket is fixed on the inflatable cabinet shell, the capacitive insulating bus is inserted into the socket, the stress body is sleeved outside the capacitive insulating bus and contained in the socket, the protective shell is sleeved outside the capacitive insulating bus, and the protective shell is sealed at one end, close to the inflatable cabinet shell, of the socket and abuts against the stress body. The utility model has the advantages that the capacitance type insulated bus is inserted into the socket, and the protective shell is adopted to compress the stress body for sealing, thereby facilitating the installation and maintenance and having simple structure; and the insulating layer is a multilayer voltage-sharing capacitor screen, the grounding shielding layer is coated outside the insulating layer, and the accessible part of the whole structure is zero potential, so that the voltage-sharing capacitor screen is safe and reliable.

Description

Connecting structure for large-current gas-filled cabinet

[ technical field ] A method for producing a semiconductor device

The utility model relates to a cubical switchboard business turn over line connection technical field especially relates to a connection structure that is used for heavy current to aerify cabinet.

[ background of the invention ]

Gas insulated switchgears (or gas insulated cabinets) are important equipment in power systems, and are used in various occasions including power plants, substations, industrial and mining enterprises, residential districts and railways. Sulfur hexafluoride gas is widely used in gas-filled cabinets due to its good insulating properties and excellent arc extinguishing properties. At present, the inlet and outlet wires of the inflatable cabinet are connected by a power cable and accessories thereof, but along with the continuous improvement of the living standard of people, the power consumption demand is increased, the rated current of the inflatable cabinet is increased gradually, and the structure of the inflatable cabinet connected by the cable can not meet the rated current requirement. In order to achieve the purpose of large-current transmission, two or more cables are generally connected in parallel, more cables and accessories thereof are needed to be matched, the structure is complex, the occupied space is large, meanwhile, the safety of operators is guaranteed, the danger of electric shock is avoided, the cost is increased, and the installation and the maintenance are not convenient.

In view of this, it is actually necessary to provide a connection structure for a large current gas-filled cabinet to solve the power transmission requirement of the large current gas-filled cabinet.

[ Utility model ] content

The utility model aims at providing a connection structure for cabinet is aerifyd to heavy current when realizing heavy current transmission, guarantees overall connection structure safe and reliable, and simple structure, and occupation space is little.

In order to achieve the purpose, the utility model provides a connecting structure for a heavy current gas-filled cabinet, which comprises a gas-filled cabinet shell, a socket, a capacitance type insulated bus, a protective shell and a stress body; the capacitive insulation bus comprises a tubular conductor, an insulation layer and a grounding shielding layer which are sequentially arranged from inside to outside, the insulation layer is provided with a plurality of layers of voltage-sharing capacitance screens, and the tail end of the tubular conductor is provided with a conductive contact which is used for being electrically connected with the socket; the socket is fixed on the inflatable cabinet shell, the capacitive insulation bus is inserted into the socket, the stress body sleeve is arranged outside the capacitive insulation bus and contained in the socket, the protective shell sleeve is arranged outside the capacitive insulation bus, and the protective shell is sealed at one end, close to the inflatable cabinet shell, of the socket and is abutted against the stress body.

In a preferred embodiment, the outermost shield of the grading capacitor screen is connected to the ground shield, the end of the insulating layer adjacent to the conductive contact is tapered, and the ground shield extends to one side of the conductive contact.

In a preferred embodiment, an insulating filling layer is filled between one end of the insulating layer close to the conductive contact and the ground shielding layer.

In a preferred embodiment, a flange is provided at an end of the socket close to the gas-filled cabinet housing, and the socket is fixed to the gas-filled cabinet housing through the flange.

In a preferred embodiment, the protective shell is provided with a screw hole, and the protective shell is fixedly connected with the flange plate by a screw passing through the screw hole.

In a preferred embodiment, the conductive contact is provided with a groove, and a spring contact finger is arranged in the groove.

In a preferred embodiment, the socket comprises an inner cone seat and a conductive contact seat, and the conductive contact is electrically connected with the conductive contact seat through the spring contact finger.

In a preferred embodiment, the inner cone seat is connected and matched with the inflatable cabinet shell, the conductive contact seat is embedded in the inner cone seat, and a sealing ring is arranged at the joint of the inner cone seat and the inflatable cabinet shell.

In a preferred embodiment, the tubular conductor and the conductive contact are connected by soldering.

The beneficial effects of the utility model reside in that: the capacitor type insulated bus is inserted into the socket, and the protective shell is adopted to press the stress body for sealing, so that the installation and maintenance are convenient, the integral structure is simple, the occupied space is small, and the cost is low; and the insulating layer of the capacitance type insulating bus is a multilayer voltage-sharing capacitance screen, the grounding shielding layer is coated outside the insulating layer, the accessible part of the whole structure is zero potential, no electric shock hazard exists, and the capacitance type insulating bus is safe and reliable.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of a connection structure for a high-current gas-filled cabinet according to a preferred embodiment of the present invention.

The reference numbers illustrate: the gas-filled tank comprises a gas-filled tank shell 10, a socket 20, an inner cone seat 21, a sealing ring 211, a conductive contact seat 22, a capacitive insulating bus 30, a tubular conductor 31, an insulating layer 32, a grounding shielding layer 33, a conductive contact 34, a groove 341, a spring contact finger 342, an insulating filling layer 35, a protective shell 40, a screw hole 41, a stress body 50 and a flange plate 60.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

Referring to fig. 1, an embodiment of the present invention provides a connection structure for a large current gas-filled cabinet, including a gas-filled cabinet shell 10, a socket 20, a capacitive insulated bus 30, a protective shell 40, and a stress body 50. The capacitance type insulated bus 30 comprises a tubular conductor 31, an insulating layer 32 and a grounding shielding layer 33 which are sequentially arranged from inside to outside, wherein the insulating layer 32 is provided with a plurality of voltage-sharing capacitance screens, and the tail end of the tubular conductor 31 is provided with a conductive contact 34 which is electrically connected with the socket 20. Wherein the conductive contact 34 is electrically connected with the socket 20 to realize the electrical conduction of the high-current gas-filled cabinet.

The socket 20 is fixed on the inflatable cabinet shell 10, the capacitive insulating bus 30 is inserted into the socket 20, the stress body 50 is sleeved outside the capacitive insulating bus 30 and is contained in the socket 20, the protective shell 40 is sleeved outside the capacitive insulating bus 30, and the protective shell 40 is sealed at one end, close to the inflatable cabinet shell 10, of the socket 20 and abuts against the stress body 50. It can be understood that the stressor 50 is made of a silicon rubber material, has excellent elastic deformation performance, and has an insulating and electrical isolation function.

The utility model provides a capacitanc insulated bus 30 is plug-in structure, inserts in socket 20 during the installation, and rethread protecting crust 40 compresses tightly stress body 50, and stress body 50's inboard closely laminates with capacitanc insulated bus 30, and stress body 50's the outside closely laminates with socket 20's inboard, reaches the purpose that conductive contact 34 is insulating to ground, realizes sealing connection.

Specifically, the insulating layer 32 is formed by winding a plurality of layers of voltage-sharing capacitance screens in an equal-gradient difference manner from inside to outside, and the electric field is uniform. The outermost screen of voltage-sharing electric capacity screen is connected and effective ground connection with ground connection shielding layer 33, and the innermost screen of voltage-sharing electric capacity screen is connected with cast conductor 31, and the one end that insulating layer 32 is close to conductive contact 34 is the toper, and ground connection shielding layer 33 extends to one side of conductive contact 34, guarantees that exposed position is zero potential, avoids personnel to electrocute danger, and no alternate and relatively ground short circuit danger. In this embodiment, the ground shield 33 is further covered with a sheath layer (not shown).

Furthermore, an insulating filling layer 35 is filled between one end of the insulating layer 32 close to the conductive contact 34 and the ground shielding layer 33, so that the insulating tightness of the connection part is ensured.

In this embodiment, a flange 60 is disposed at one end of the socket 20 close to the gas-filled cabinet housing 10, and the socket 20 is fixed on the gas-filled cabinet housing 10 through the flange 60, so that the connection is more secure.

The protective shell 40 is provided with a screw hole 41, and the protective shell 40 passes through the screw hole 41 through a screw to be fixedly connected with the flange plate 60, so that the installation and the disassembly are convenient.

Specifically, the conductive contact 34 is provided with a groove 341, and a spring contact finger 342 is disposed in the groove 341. In this embodiment, the groove 341 is a U-shaped groove, and the spring contact finger 342 has a high current capacity, a simple structure, and is convenient to install.

The socket 20 includes an inner cone seat 21 and a conductive contact seat 22, and the conductive contact 34 is electrically connected with the conductive contact seat 22 through the spring contact finger 342 to realize electrical connection. In this embodiment, the inner cone seat 21 is a cone, the inner cone seat 21 is connected and matched with the inflatable cabinet shell 10, the conductive contact seat 22 is embedded in the inner cone seat 21, a sealing ring 211 is arranged at the joint of the inner cone seat 21 and the inflatable cabinet shell 10, and the inner cone seat 21 and the conductive contact seat 22 are of an integrated structure, so that the inner and outer sealing effects of the inflatable cabinet are ensured.

Preferably, the tubular conductor 31 and the conductive contact 34 are connected by welding, so that hard contact is reduced, contact resistance is reduced, and temperature rise is reduced.

The connection structure for the large-current gas-filled cabinet provided by the embodiment of the utility model is inserted into the socket 20 through the capacitance type insulated bus 30, and the protective shell 40 is adopted to compress the stress body 50 for sealing, thereby facilitating the installation and maintenance, having simple integral structure, small occupied space and low cost; and the insulating layer 32 of the capacitance type insulating bus 30 is a multilayer voltage-sharing capacitance screen, the grounding shielding layer 33 is coated outside the insulating layer 32, and the whole structure can touch the zero potential, so that the capacitance type insulating bus has no electric shock hazard, and is safe and reliable.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. A connecting structure for a large-current gas-filled cabinet is characterized by comprising a gas-filled cabinet shell, a socket, a capacitive insulating bus, a protective shell and a stress body; the capacitive insulation bus comprises a tubular conductor, an insulation layer and a grounding shielding layer which are sequentially arranged from inside to outside, the insulation layer is provided with a plurality of layers of voltage-sharing capacitance screens, and the tail end of the tubular conductor is provided with a conductive contact which is used for being electrically connected with the socket; the socket is fixed on the inflatable cabinet shell, the capacitive insulation bus is inserted into the socket, the stress body sleeve is arranged outside the capacitive insulation bus and contained in the socket, the protective shell sleeve is arranged outside the capacitive insulation bus, and the protective shell is sealed at one end, close to the inflatable cabinet shell, of the socket and is abutted against the stress body.

2. A connection structure for a high current gas filled cabinet according to claim 1, wherein the outermost shield of said grading capacitor shield is connected to said ground shield, one end of said insulating layer adjacent to said conductive contacts is tapered, and said ground shield extends to one side of said conductive contacts.

3. A connection structure for a high current gas filled cabinet according to claim 2, wherein an insulating filling layer is filled between one end of the insulating layer close to the conductive contact and the grounding shielding layer.

4. A connection structure for a high current gas filled cabinet according to claim 1, wherein a flange is provided at an end of the socket close to the gas filled cabinet housing, and the socket is fixed on the gas filled cabinet housing through the flange.

5. The connection structure for a large-current gas-filled cabinet according to claim 4, wherein a screw hole is formed in the protective shell, and the protective shell is fixedly connected with the flange plate by a screw passing through the screw hole.

6. A connection structure for a large current gas filled cabinet according to claim 1, wherein the conductive contact is provided with a groove, and a spring contact finger is arranged in the groove.

7. The connection structure for a high current gas filled cabinet according to claim 6, wherein the socket comprises an inner cone seat and a conductive contact seat, and the conductive contact is electrically connected with the conductive contact seat through the spring contact finger.

8. The connection structure for a large-current gas-filled cabinet according to claim 7, wherein the inner cone seat is connected and matched with the gas-filled cabinet shell, the conductive contact seat is embedded in the inner cone seat, and a sealing ring is arranged at the connection part of the inner cone seat and the gas-filled cabinet shell.

9. A connection structure for a high current gas filled cabinet according to claim 1, wherein the tubular conductor and the conductive contact are connected by welding.