CN204905738U - Cubical switchboard and circuit breaker handcart thereof - Google Patents

Abstract

The utility model discloses a switch cabinet and a circuit breaker handcart thereof, wherein the circuit breaker handcart includes a main body of the handcart and a vacuum arc extinguishing fixedly arranged on the main body of the handcart; The device is elastically connected to the conductive rod at the lower end of the vacuum interrupter, and the bottom of the current transformer is fixed on the main body of the handcart. A soft connection device is used to install the current transformer and the vacuum interrupter fixed to the main body of the handcart. This connection method reduces the space occupied by the circuit breaker handcart in the switch cabinet. At the same time, this connection is fixed. It is firm and can well adapt to the working environment where the circuit breaker trolley often slides in and out of the switch cabinet. In addition, because of the elastic connection fixing method, the vibration or collision caused by the circuit breaker trolley to the electrical equipment during the back and forth movement is also less Small. The utility model also discloses a switch cabinet including the handcart of the circuit breaker.

Description

Switch cabinet and its circuit breaker handcart

technical field

The utility model relates to the technical field of power supply equipment, more specifically, relates to a circuit breaker handcart, and also relates to a switch cabinet including the circuit breaker handcart.

Background technique

Switchgear is a kind of electrical equipment, its main function is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system.

The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. According to different voltage levels, it can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear. It is mainly used in various occasions such as power plants, substations, petrochemicals, metallurgical steel rolling, light industry and textiles, factories and mines, residential quarters, and high-rise buildings.

Most of the switch cabinets widely used in the market adopt the technical solution of placing current transformers in the cabinet, but the inventors found that the switch cabinet using this technical solution has a cramped space inside the cabinet, which affects the layout of other electrical components, and the matching of open circuit The circuit breaker handcart is more troublesome, and the circuit breaker handcart is more difficult to adapt to different types of switch cabinets. However, there is no technical solution for effectively arranging the current transformers at other positions in the switch cabinet and achieving a good use effect.

To sum up, how to effectively solve the problem of the installation position and the use effect of the current transformer in the switch cabinet is an urgent problem for those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a circuit breaker handcart, the structural design of which can effectively solve the problem of the installation position and use effect of the current transformer in the switch cabinet.

In order to achieve the above object, the utility model provides the following technical solutions:

A handcart for a circuit breaker, comprising a main body of the handcart and a vacuum interrupter fixedly arranged on the main body of the handcart; and a current transformer, which is elastically connected to a conductive rod at the lower end of the vacuum interrupter through a soft connection device, The bottom of the current transformer is fixed on the main body of the handcart.

Preferably, in the above circuit breaker handcart, one end of the flexible connection device is electrically connected to the conductive rod of the vacuum interrupter through a conductive clip, and the other end of the flexible connection device is electrically connected to the primary incoming line side of the current transformer.

Preferably, in the above circuit breaker handcart, a conductive plate is also installed between the current transformer and the vacuum interrupter, one end of the conductive plate is electrically connected to the primary outlet side of the current transformer, and the other end is connected to the moving contact of the circuit breaker handcart. header electrical connection.

Preferably, in the handcart of the above-mentioned circuit breaker, the lower end of the vacuum interrupter is equipped with a lower outlet seat, and the position adjacent to the conductive plate and the moving contact is fixedly connected with the lower outlet seat by screws.

Preferably, in the above circuit breaker handcart, an insulating spacer is provided between the conductive plate and the lower outlet seat, and the insulating spacer is compressed by the installed screws.

Preferably, in the above circuit breaker handcart, an insulating washer is also provided between the screw and the conductive plate.

Preferably, in the above circuit breaker handcart, the lower outlet seat is electrically connected to the flexible connection device, and the insulating spacer is arranged between the conductive plate and the flexible connection device to isolate and insulate the two.

Preferably, in the above-mentioned circuit breaker handcart, an insulating support piece fastened by screws is installed at the connection point between the conductive plate and the current transformer, and the insulating support piece is provided with a baffle structure, which connects the conductive plate to the soft connection Device location isolation.

The circuit breaker handcart provided by the utility model includes a main body of the handcart and a vacuum interrupter fixedly arranged on the main body of the handcart; it also includes a current transformer, and the current transformer is connected to the conductive rod at the lower end of the vacuum interrupter through a soft connection device. Elastic connection, the bottom of the current transformer is fixed on the main body of the handcart. The existing technical scheme of setting the current transformer and the handcart of the circuit breaker as a whole, and setting it in the cabinet relative to the current transformer, and separately from the handcart of the circuit breaker reduces the occupation of the space in the cabinet and solves the problem of the space in the cabinet. It is also convenient to adjust the adaptability of the current transformer and the circuit breaker handcart, which greatly enhances the ability of the circuit breaker handcart to adapt to different types of switch cabinets; the current transformer is connected by a soft connection device It is installed integrally with the vacuum interrupter fixed to the main body of the handcart. This connection method reduces the space occupied by the handcart of the circuit breaker in the switch cabinet. It adapts to the working environment where the circuit breaker handcart often enters and exits the switch cabinet and generates vibrations. In addition, due to the elastic connection fixing method, the vibration or collision caused to the electrical equipment during the back and forth movement of the circuit breaker handcart is also smaller. To sum up, the above technical solutions effectively solve the problem of the installation position and use effect of the current transformer in the switch cabinet.

The utility model also provides a switch cabinet, including a cabinet body and a circuit breaker handcart matched with the cabinet body. The circuit breaker handcart is the circuit breaker handcart described in any one of the contents of the above utility model. Since the above-mentioned circuit breaker handcart has the above-mentioned technical effects, the switchgear with the circuit breaker handcart should also have corresponding technical effects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker handcart provided by an embodiment of the present invention.

The markings in the attached drawings are as follows:

Vacuum interrupter 1, lower outlet seat 2, handcart body 3, conductive clip 4, insulating washer 5, insulating spacer 6, moving contact 7, conductive plate 8, insulating support 9, soft connection device 10, current mutual inductance Device 11.

Detailed ways

The embodiment of the utility model discloses a circuit breaker handcart to solve the problem of the installation position and the use effect of the current transformer in the switch cabinet.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, Fig. 1 is a schematic structural diagram of a circuit breaker handcart provided by an embodiment of the present invention. The circuit breaker handcart provided by the utility model includes a handcart main body 3 and a vacuum interrupter 1 fixedly arranged on the handcart main body 3; The conductive rod at the lower end of the arc chamber 1 is elastically connected, and the bottom of the current transformer 11 is fixed on the main body 3 of the handcart.

It should be noted that the flexible connection device 10 includes elastic cables, screws, bolts and washers matching with it as connecting accessories, and also includes various gaskets and retaining rings with insulating functions. The elastic connection mentioned therein may mean that the connecting part itself has elasticity or the effect of elastic connection is achieved through each connecting piece.

The existing technical scheme that the current transformer 11 and the circuit breaker handcart are arranged integrally, arranged in the cabinet relative to the current transformer 11, and arranged separately from the circuit breaker handcart reduces the occupation of the space in the cabinet and solves the problem of cabinet failure. The problem of cramped space in the body; at the same time, the integration of the current transformer 11 and the circuit breaker handcart facilitates its adaptive adjustment, which greatly enhances the ability of the circuit breaker handcart to adapt to different types of switch cabinets; the use of soft connection devices 10 The current transformer 11 is installed integrally with the vacuum interrupter 1 fixed to the main body 3 of the handcart. This connection method reduces the space occupied by the handcart of the circuit breaker in the switch cabinet, and at the same time, this connection is firmly connected. , because the connection itself is non-rigid and has a certain degree of elasticity, it is not easy to fall off under external stress. It can well adapt to the working environment where the circuit breaker handcart often slides in and out of the switch cabinet and generates vibration. In addition, because it is fixed by elastic connection , The vibration or collision caused to the electrical equipment during the back and forth movement of the circuit breaker trolley is also smaller. To sum up, the above technical solutions effectively solve the problem of the installation position and use effect of the current transformer 11 in the switch cabinet.

In order to further optimize the implementation effect of the soft connection device in the above technical solution, preferably on the basis of the above embodiment, in the above circuit breaker handcart, one end of the soft connection device 10 is electrically connected to the conductive rod of the vacuum interrupter 1 through the conductive clip 4 , the other end of the flexible connection device 10 is electrically connected to the primary incoming line side of the current transformer 11 .

It should be noted that the current transformer 11 has a primary incoming line side and a primary outgoing line side, both of which have the structure and function of electrical conduction. In the technical solution of this application, the vacuum interrupter 1 The position in the handcart is relatively upper, and the current transformer 11 is arranged below the vacuum interrupter 1, and the vacuum interrupter 1 is electrically connected to the current transformer 11 through the soft connection device 10, and the conductive clip 4 is added to the The method of conducting rods is specifically realized, wherein the electrical connection includes not only the connection of the circuit conduction but also the connection of the structure. With this technical solution, the current transformer 11 is elastically connected to the vacuum interrupter 1 through the elastic design of the flexible connection device 10, so that the current transformer 11 is effectively protected from damage, and the conductive clip 4 is suitable for this embodiment. , its implementation is convenient and easy to connect.

In order to further optimize the implementation effect of the flexible connection device in the above-mentioned technical solution, preferably on the basis of the above-mentioned embodiment, in the above-mentioned circuit breaker handcart, a conductive plate 8 is also installed between the current transformer 11 and the vacuum interrupter 1 to conduct electricity. One end of the plate 8 is electrically connected to the primary outlet side of the current transformer 11, and the other end is electrically connected to the moving contact 7 of the circuit breaker handcart.

It should be noted that the conductive plate 8 provided by this technical solution is a conductive structure with relatively high rigidity and certain elasticity. The head 7 is used to contact and conduct with the static contact on the switch cabinet body. The moving contacts 7 are usually arranged in pairs, and one of the moving contacts 7 is directly connected to the current transformer 11 . This technical solution further optimizes the protective effect of the elastic connection on the equipment. Since the elastic conductive plate 8 is used to connect the moving contact 7 and the current transformer 11, the moving contact 7 also has certain elastic characteristics, and is compatible with the static contact. The contact fit is smoother.

In order to further optimize the implementation effect of the flexible connection device in the above-mentioned technical solution, preferably on the basis of the above-mentioned embodiment, in the above-mentioned circuit breaker handcart, the lower end of the vacuum interrupter 1 is equipped with a lower outlet seat 2, and the conductive plate 8 and the moving contact The position adjacent to the head 7 is fixedly connected with the lower outlet seat 2 by screws.

The lower outlet seat 2 is fixed to the lower end of the vacuum interrupter 1, and the lower end of the vacuum interrupter 1 is a terminal, so the connection between the soft connection device 10 mentioned in the above embodiment and the vacuum interrupter 1 is actually connected to the vacuum interrupter 1. The connection of the lower outlet socket 2. Since the vacuum interrupter 1 and the main body of the handcart 3 are fixed, and the connection between the conductive plate 8 and the current transformer 11 is stable and flexible, this technical solution makes the gap between the vacuum interrupter 1 and the current transformer 11 more One layer of elastic connection, and the other ends of the two are fixed. This connection method not only has a good fixing and positioning function, but also because of the elastic connection, the connection is more durable and not easy to be damaged.

In order to further optimize the insulation effect of the flexible connection device in the above technical solution, preferably on the basis of the above embodiment, in the above circuit breaker handcart, an insulating spacer 6 is provided between the conductive plate 8 and the lower outlet seat 2, and the insulating spacer 6 Compressed by the installed screws. It should be noted that the screw mentioned in this implementation is the screw that fixes the conductive plate 8 and the lower outlet seat 2 in the above-mentioned embodiment. The insulating spacer 6 here can effectively prevent the current transformer 11 from being assembled. is shorted.

In order to further optimize the insulation effect of the flexible connection device in the above technical solution, on the basis of the above embodiment, preferably, in the above circuit breaker handcart, an insulating washer 5 is also provided between the screw and the conductive plate 8 . In the above-mentioned embodiment, the technical scheme of setting the insulating spacer 6 between the conductive plates 8 and the lower outlet seat 2 has been provided. On this basis, the present embodiment further sets an insulating spacer between the screws and the conductive plates 8. The gasket 5 further optimizes the insulation effect and improves the performance of preventing short circuit.

In order to further optimize the insulation effect of the flexible connection device in the above technical solution, preferably on the basis of the above embodiments, the electrical connection between the lower outlet seat 2 and the flexible connection device 10, the insulating spacer 6 is arranged between the conductive plate 8 and the flexible connection device 10, isolate and insulate the two. Using this technical solution, the conductive plate 8 and the flexible connection device 10 are fixed to the lower outlet seat 2 at the same time, so that the outlet positions of the device are unified, and it is convenient to set the positions of related electrical components. Insulation prevents short-circuiting, and an insulating spacer 6 is used to isolate the two.

In order to further optimize the insulation effect of the flexible connection device in the above technical solution, on the basis of the above embodiment, preferably, in the above circuit breaker handcart, the connection point between the conductive plate 8 and the current transformer 11 is also installed with a screw fastened The insulating support 9 is provided with a baffle structure, and the baffle structure isolates the conductive plate 8 from the flexible connection device 10 .

It should be noted that the baffle structure is erected at the connection point on the primary outgoing line side of the current transformer 11, and separates the conductive plate 8 connected from the primary outgoing line side and the flexible connection device 10 connected from the primary incoming line side. Insulation, adopting the technical solution of the insulating support 9 can effectively isolate the flexible connection device 10 from the conductive plate 8 and prevent short circuit.

Based on the circuit breaker handcart provided in the above embodiments, the utility model also provides a switchgear, the switchgear includes a cabinet and a matching circuit breaker handcart, and the circuit breaker handcart includes the circuit breaker provided in any of the above embodiments. handcart. Since the switch cabinet adopts the circuit breaker handcart in the above embodiment, please refer to the above embodiment for the beneficial effect of the switch cabinet.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A circuit breaker handcart, characterized in that it comprises a handcart main body (3) and a vacuum interrupter (1) fixedly arranged on the handcart main body (3); also includes a current transformer (11) , the current transformer (11) is elastically connected to the conductive rod at the lower end of the vacuum interrupter (1) through a flexible connection device (10), and the bottom of the current transformer (11) is fixed to the main body of the handcart ( 3) on. 2. The circuit breaker handcart according to claim 1, characterized in that one end of the flexible connection device (10) is electrically connected to the conductive rod of the vacuum interrupter (1) through a conductive clip (4), so that The other end of the flexible connection device (10) is electrically connected to the primary incoming line side of the current transformer (11). 3. The circuit breaker handcart according to claim 2, characterized in that, the current transformer (11) is also equipped with a conductive plate (8), and one end of the conductive plate (8) is connected to the current transformer ( 11) is electrically connected to the primary outlet side, and the other end is electrically connected to the moving contact (7) of the circuit breaker handcart. 4. The circuit breaker handcart according to claim 3, characterized in that, the lower end of the vacuum interrupter (1) is equipped with a lower outlet seat (2), and the conductive plate (8) is connected to the moving contact The position adjacent to the head (7) is fixedly connected with the lower outlet seat (2) by screws. 5. The circuit breaker handcart according to claim 4, characterized in that an insulating spacer (6) is provided between the conductive plate (8) and the lower outlet seat (2), and the insulating spacer (6) Compressed by the installed screws. 6. The circuit breaker handcart according to claim 5, characterized in that an insulating washer (5) is also provided between the screw and the conductive plate (8). 7. The circuit breaker handcart according to claim 5, characterized in that the lower outlet seat (2) is electrically connected to the soft connection device (10), and the insulating spacer (6) is arranged on The conductive plate (8) is isolated and insulated from the soft connection device (10). 8. The circuit breaker handcart according to claim 3, characterized in that an insulating support ( 9), the insulating support (9) is provided with a baffle structure, and the baffle structure isolates the conductive plate (8) from the flexible connection device (10). 9. A switch cabinet, comprising a cabinet body and a circuit breaker handcart matched with the cabinet body, characterized in that the circuit breaker handcart is the circuit breaker handcart according to any one of claims 1 to 8 .