CN212033521U - Mutual inductance sleeve and switch cabinet - Google Patents

Abstract

The utility model discloses a mutual inductance bushing and a switch cabinet. The mutual inductance bushing comprises an electrical connection body, an insulating sleeve body and a mutual inductor. The electrical connecting body is connected between at least two terminals to be connected; the insulating sleeve is sleeved on the outside of the electrical connecting body; face. The insulating sleeve is sleeved on the outer peripheral wall of the insulating terminal to further insulate the electrical connection body. In addition, through the limit installation of the transformer directly with the insulating sleeve, the stability of the installation of the transformer is greatly improved. ease of installation. At the same time, it is ensured that the mutual inductance bushing has the functions of lap, protection and measurement through the wall at the same time. In addition, when the mutual inductance bushing and the circuit breaker are installed together, the integration of the mutual inductor and the circuit breaker is realized, so that the circuit breaker has its own protection and measurement functions. Therefore, the volume of the switch cabinet and the difficulty of design and assembly are indirectly reduced, and the cost is reduced.

Description

A mutual inductance bushing and switch cabinet

technical field

The utility model relates to the technical field of power transmission and distribution, in particular to a mutual inductance bushing and a switch cabinet.

Background technique

As a kind of electrical equipment, the switch cabinet first enters the main control switch in the cabinet, and then enters the sub-control switch, and each sub-circuit is set according to its needs. Such as instruments, automatic control, motor magnetic switches, various AC contactors, etc., and some also have high-voltage room and low-voltage room switch cabinets, high-voltage busbars, such as power plants, etc. load shedding. With the continuous updating of technical requirements, switchgear requires protection and measurement functions as a whole.

Chinese patent document CN210040949U discloses a high-voltage switchgear, which includes a partition, an isolation switch, a shielded wall bushing, a circuit breaker switch, a through-core current transformer and a grounding switch; wherein the shielded wall bushing Including: center conductor, transformer, insulator and installation boss, when in use, connect the installation boss with the transformer, and set insulators on the center conductor on both sides of the boss to achieve installation.

However, in the switchgear with the above structure, the installation bosses adapted to the transformers need to be installed separately, and the installation positions of the installation bosses need to be separately set, the insulators are cut off, and the installation bosses are installed between the two cut off insulators. , resulting in more complicated installation and use of the actual shielded wall bushing, resulting in inconvenience in use.

Utility model content

Therefore, the technical problem to be solved by the present invention is that in the prior art, since the installation bosses adapted to the transformers need to be installed separately, and the installation positions of the installation bosses need to be set separately, the insulators are cut off and the installation bosses are installed. Between the two cut off insulators, the actual installation and use of the shielded wall bushing is complicated, resulting in inconvenience in use.

To this end, the utility model provides a mutual inductance bushing, comprising:

an electrical connector, connected between at least two to-be-connected ends;

an insulating sleeve, sleeved on the outside of the electrical connector;

The transformer has a mounting hole, and the mounting hole is limitedly mounted on the outer peripheral surface of the insulating sleeve body.

Optionally, in the above-mentioned mutual inductance sleeve, the insulating sleeve body is an umbrella skirt.

Optionally, in the above-mentioned mutual inductance sleeve, the insulating sleeve body and the installation hole are in an interference fit.

Optionally, in the above-mentioned mutual inductance bushing, the electrical connection body includes a central conductor and an installation sleeve, and the installation sleeve is sleeved on the outside of the central conductor;

The insulating sleeve body is installed outside the installation sleeve body.

Optionally, in the above-mentioned mutual inductor bushing, the transformer is a through-core current transformer.

A switchgear, comprising

a separator, separating at least two chamber bodies to be connected, any of the chamber bodies to be connected has at least one end to be connected;

And the above-mentioned mutual inductance sleeve, the mutual inductance sleeve is penetrated on both sides of the partition plate, and the electrical connection body is communicated with at least two adjacent to-be-connected ends.

Optionally, in the above switch cabinet, the electrical connector has two connection ends,

The switch cabinet also includes connecting cables and circuit breakers arranged in the two chambers to be connected;

At least one end of the electrical connecting body is connected to the isolation switch and the cable; at least one end of the electrical connecting body is connected to the vacuum circuit breaker.

Optionally, the above-mentioned switch cabinet further includes an installation structure, and the installation structure includes: a connecting piece and a locking piece;

The connecting piece is clamped on the outside of the electrical connecting body, the locking piece is penetrated in the connecting hole of the connecting piece, and the locking piece is locked and connected to the partition.

Optionally, in the above-mentioned switch cabinet, the connector is at least two splicing connectors, and the splicing connectors have an arc-shaped groove;

All the grooves of the spliced connectors are spliced into limit holes of the connector, and the electrical connectors are clamped in the limit holes.

Optionally, the above-mentioned switch cabinet has two of the splicing connectors, and the groove is semicircular.

The technical scheme provided by the utility model has the following advantages:

1. The mutual inductance bushing provided by the present utility model includes: an electrical connection body, an insulating sleeve body and a mutual inductor. The electrical connecting body is connected between at least two terminals to be connected; the insulating sleeve is sleeved on the outside of the electrical connecting body; face.

The mutual inductance bushing of this structure is sleeved on the outer peripheral wall surface of the insulating terminal through the insulating sleeve to realize further insulation of the electrical connection body. At the same time of stability, the convenience of installation is greatly improved. At the same time, it is ensured that the mutual inductance bushing has the functions of lap, protection and measurement through the wall at the same time. In addition, when the mutual inductance bushing and the circuit breaker are installed together, the integration of the mutual inductor and the circuit breaker is realized, so that the circuit breaker has its own protection and measurement functions. Thus, the volume of the switch cabinet and the difficulty of design and assembly are indirectly reduced, and the cost is reduced.

2. In the mutual inductance sleeve provided by the present invention, the insulating sleeve body is an umbrella skirt. The insulating sleeve body is in interference fit with the mounting hole. In the mutual inductance sleeve of this structure, since the insulating sleeve body can be made of a flexible material shed, the connection between the insulating sleeve body and the installation hole is an interference fit, which further facilitates the installation and use of the transformer and the insulating sleeve body. In addition, the setting of the umbrella skirt increases the creepage distance on the surface of the mutual inductance casing to prevent pollution flashover.

3. The switch cabinet provided by the utility model includes: a partition plate and a mutual inductance bushing. Wherein, the partition plate separates at least two chamber bodies to be connected, and any of the chamber bodies to be connected has at least one end to be connected; The body communicates with at least two adjacent ends to be connected. The mutual inductance bushing is installed on both sides of the partition, so as to be connected with the connection ends on both sides by IE, which further ensures the reliability of the circuit breaker connection. The circuit breaker has its own protection and measurement functions, thereby indirectly reducing the volume of the switch cabinet, the difficulty of design and assembly, and the cost.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic structural diagram of a switch cabinet provided in Embodiment 1;

2 is a schematic structural diagram of the mutual inductance bushing provided in Embodiment 1;

Description of reference numbers:

1-Center conductor; 2-Installation sleeve;

3-insulating casing; 4-transformer; 5-partition; 6-isolating switch; 7-cable; 8-vacuum circuit breaker;

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

Example 1

This embodiment provides a switch cabinet, as shown in FIG. 1 and FIG. 2 , including: a disconnecting switch 6 and a cable 7 , a vacuum circuit breaker 8 , a partition 5 and a mutual inductance bushing. Wherein, the partition 5 separates two chambers to be connected, and any chamber to be connected has one end to be connected; the mutual inductance bushing is penetrated on both sides of the partition 5, and one end of the mutual inductance bushing is connected to the isolation switch 6 and the cable 7 , the other end is connected to the vacuum circuit breaker 8 and then connected to the transformer.

As shown in FIG. 2 , the mutual inductance bushing provided in this embodiment includes: an electrical connection body, an insulating sleeve body 3 and a mutual inductor 4 . The electrical connection body includes a central conductor 1 and an installation sleeve 2. Both ends of the central conductor 1 are respectively connected to the two to-be-connected ends. The installation sleeve 2 is sleeved on the outside of the central conductor 1; the insulating sleeve 3 is installed on the installation sleeve. The outer side of the body 2; the transformer 4 has a mounting hole, and the mounting hole is limited and installed on the outer peripheral surface of the insulating sleeve body 3. For example, the transformer 4 is a feedthrough current transformer 4 . In this embodiment, the central conductor 1 is made of T2 copper or a conductive material of the same performance. The mounting sleeve 2 is made of a composite insulating material, such as epoxy resin composite insulating material. Of course, in other optional embodiments, the composite insulating material can also be high-voltage silicone rubber. The installation sleeve body 2 is casted or coated on the outer side of the central conductor 1 .

Specifically, the insulating sleeve body 3 is an umbrella skirt. And the insulating sleeve body 3 is in interference fit with the installation hole. The material of the shed can be made of silicone material. Since the insulating sleeve 3 can be made of a flexible material, the connection between the insulating sleeve 3 and the mounting hole is an interference fit, which further facilitates the transformer 4 and the insulating sleeve 3 installation and use. In addition, the setting of the umbrella skirt increases the creepage distance on the surface of the mutual inductance casing to prevent pollution flashover.

The above also includes an installation structure, the installation structure includes: a connecting piece and a locking piece; the connecting piece is clamped on the outside of the electrical connection body, the locking piece is inserted in the connecting hole of the connecting piece, and the locking piece partition 5 is locked and connected. The connector is at least two splicing connectors, and the splicing connectors have arc-shaped grooves; the grooves of all the splicing connectors are spliced into limit holes of the connector, and the electrical connectors are clamped in the limit holes. Specifically, the connector has two spliced connectors, and the groove is semicircular.

Of course, in other embodiments, the connectors are three, four, five, etc. splicing connectors, as long as the splicing connectors have arc-shaped grooves; and all the grooves can be enclosed as a circular limit hole.

The mutual inductance bushing provided in this embodiment is sleeved on the outer peripheral wall surface of the insulating terminal through the insulating sleeve body 3, so as to further insulate the electrical connection body. While achieving the stability of the installation of the transformer 4, the convenience of installation is greatly improved. At the same time, it is ensured that the mutual inductance bushing has the functions of lap, protection and measurement through the wall at the same time. In addition, when the mutual inductance bushing and the circuit breaker are installed together, the integration of the mutual inductor 4 and the circuit breaker is realized, so that the circuit breaker has its own protection and measurement functions. , thereby indirectly reducing the volume of the switchgear, the difficulty of design and assembly, and the cost. Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. a mutual inductance sleeve, is characterized in that, comprises an electrical connector, connected between at least two to-be-connected ends; an insulating sleeve body (3), sleeved on the outside of the electrical connection body; The transformer (4) is provided with a mounting hole, and the mounting hole is limitedly mounted on the outer peripheral surface of the insulating sleeve body (3). 2. The mutual inductance bushing according to claim 1, characterized in that, The insulating sleeve body (3) is an umbrella skirt. 3. The mutual inductance bushing according to claim 2, characterized in that, The insulating sleeve body (3) is in interference fit with the mounting hole. 4. The mutual inductance bushing according to any one of claims 1-3, characterized in that, The electrical connection body comprises a central conductor (1) and an installation sleeve (2), and the installation sleeve (2) is sleeved on the outside of the central conductor (1); The insulating sleeve body (3) is mounted on the outside of the installation sleeve body (2). 5. The mutual inductance bushing according to any one of claims 1-3, wherein, The transformer (4) is a through-core current transformer (4). 6. A switch cabinet, characterized in that, comprising A separator (5), separating at least two chamber bodies to be connected, any of the chamber bodies to be connected has at least one end to be connected; And the mutual inductance bushing according to any one of claims 1-5, the mutual inductance bushing is penetrated on both sides of the partition plate (5), and the electrical connection body is connected to the adjacent at least two of the Connected ends. 7. The switch cabinet according to claim 6, wherein the electrical connector has two connecting ends, The switch cabinet further comprises connecting cables (7) and circuit breakers arranged in the two chambers to be connected; At least one end of the electrical connecting body is connected to the isolation switch (6) and the cable (7); at least one end of the electrical connecting body is connected to the vacuum circuit breaker (8). 8 . The switch cabinet according to claim 6 , further comprising an installation structure, the installation structure comprising: a connecting piece and a locking piece; 8 . The connecting piece is clamped on the outside of the electrical connecting body, the locking piece is penetrated in the connecting hole of the connecting piece, and the locking piece is locked and connected to the partition plate (5). 9. The switchgear according to claim 8, characterized in that, The connector is at least two splicing connectors, and the splicing connectors have an arc-shaped groove; All the grooves of the spliced connectors are spliced into limit holes of the connector, and the electrical connectors are clamped in the limit holes. 10. The switchgear according to claim 9, characterized in that, There are two spliced connectors, and the grooves are semicircular.

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