CN215835015U

CN215835015U - Centrally installed switchgear

Info

Publication number: CN215835015U
Application number: CN202121263975.5U
Authority: CN
Inventors: 彭科; 刘国振; 何双江; 赵华
Original assignee: Ningbo Aux High Tech Co Ltd
Current assignee: Ningbo Aokes Intelligent Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2022-02-15
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a centrally installed switchgear which comprises a switchgear body and an opening grounding handcart, wherein the opening grounding handcart is provided with a containing cavity and is communicated with the containing cavity; the trigger piece is arranged at the back of the cabinet body; the contact switch is arranged in the accommodating cavity of the cabinet body and can be triggered by the trigger piece when the grounding handcart is installed in place; the trigger piece is arranged at the position on the back of the grounding handcart; the contact switch is an auxiliary switch. The trigger piece sets up the position that leans on at the back of ground connection handcart and the surrounding space is great, and contact switch is auxiliary switch and auxiliary contact is more, and is great like this through the space and auxiliary contact is more, can connect a plurality of contacts to auxiliary switch, and the function is abundanter like this.

Description

Centrally installed switchgear

Technical Field

The utility model relates to the technical field of centrally installed switchgear, in particular to a centrally installed switchgear.

Background

At present, a centrally installed switchgear represented by KYN28A-12 is generally provided with a grounding handcart in order to guarantee the safety of overhaul. Before the overhaul, can shake the grounding handcart to operating position, through the inlet wire side that the grounding handcart will cut off the power supply, or main bus system ground connection to guarantee the safe operational environment of maintainer zero potential. Because in put cabinet itself and be supporting with circuit breaker handcart or PT handcart, and the ground connection handcart openly sees, and is similar with circuit breaker handcart or PT handcart, whether the handcart that singly relies on the vision to judge to shake into is ground connection handcart, perhaps whether ground connection car shakes into the position and has the risk of judging misalignment. Once human judgment fails, the middle cabinet is internally shaken into a non-grounded handcart, or the grounded handcart is not shaken into place, and under the condition of non-grounding, serious safety accidents of high-voltage electric shock of maintainers can occur.

To this end, the applicant has devised a solution. For example, chinese utility model patent with application number CN201820334447.6 (publication number CN208174120U) discloses "a device for identifying the entry of different handcarts of a switch cabinet", which includes a switch cabinet body, a circuit breaker handcart, a grounding handcart, an identification device, an electrical control circuit, and a main control console for controlling the electrical control circuit; the switch cabinet body is connected with an electrical control loop, and the electrical control loop comprises a locking contact; the switch cabinet body comprises a lower partition plate, the identification device comprises an identification device body, an identification device travel switch and an identification device push-press plate, the identification device body is arranged in the lower partition plate, and the locking contact is arranged in the identification device body; the identification device pushing plate is arranged at one end of a chassis of the grounding handcart, and the identification device body is also provided with a signal transmitter connected with the main control console; this patent can effectively distinguish the different handcart that gets into the cubical switchboard thereby avoids leading to the emergence of personal and property incident because the back end is judged the mistake to different handcart, guarantees simultaneously that the shutting contact reliably moves in electrical control return circuit.

However, in the above patent, the pushing plate of the identification device is installed at one end of the chassis of the grounded handcart, the space of the pushing plate is small, the pressing plate is used for triggering the travel switch of the identification device, and the travel switch is often in two states of one open state and one closed state, so that the travel switch is not convenient to modify due to the limitation of the space near the chassis of the grounded handcart and the limitation of the internal structure of the travel switch, and the function is single.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a middle cabinet with more abundant functions according to the current situation of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a centrally installed switchgear comprises

The cabinet body is provided with an accommodating cavity and an opening communicated with the accommodating cavity;

the grounding handcart can enter and exit the accommodating cavity under the action of external force;

the trigger piece is arranged at the back of the cabinet body;

the contact switch is arranged in the accommodating cavity of the cabinet body and can be triggered by the trigger piece when the grounding handcart is installed in place;

the method is characterized in that:

the trigger piece is arranged at a position on the back of the grounding handcart;

the contact switch is an auxiliary switch.

The trigger member may have a variety of configurations, and preferably is a bolt secured to the back of the grounded hand truck.

In order to facilitate installation, the handcart withdrawing device further comprises a pressing piece arranged on the front side of the contact switch along the handcart withdrawing direction, the area of one side of the pressing piece, facing the trigger piece, is larger than the contact area of the trigger piece and the pressing piece, and the trigger piece faces the middle part of the pressing piece;

when the grounding handcart is not installed in place, the pressing piece cannot trigger the contact switch.

When the grounding handcart is installed in place, the trigger piece acts on the pressing piece, and the pressing piece triggers the contact switch.

Because the external diameter of bolt is less, if bolt or contact switch exist assembly error, the bolt is difficult to trigger contact switch, and through setting up the pressing piece, the size of pressing piece is great, and the required precision to bolt and contact switch's mounted position is lower like this, even the position has the deviation slightly, the bolt also can be used for triggering contact switch to be convenient for install.

The shape of the pressing member may be various, and preferably, the pressing member has a plate shape or a block shape.

In order to install the contact switch and the pressing piece, the installation seat is arranged in the accommodating cavity and used for installing the contact switch and the pressing piece. Through setting up the mount pad, be convenient for the installation of contact switch and pressing member.

The pressing piece and the contact switch can be mounted in various ways, preferably, the pressing piece extends left and right, the end part of the pressing piece is provided with a pin which is inserted into a mounting hole of the mounting seat, and the free end of the pin is bent and fixed on the mounting seat after the pin is inserted into the mounting hole;

the pin has a movable gap in the mounting hole so that the pressing piece can be pushed by the trigger piece to trigger the contact switch.

In order to ensure that the pressing piece is stably connected on the mounting seat, the pins are provided with a plurality of pins which are arranged at intervals along the vertical direction. Through setting up a plurality of participating in, be favorable to the pressing part to stabilize and connect on the mount pad.

In order to distinguish the grounding handcart from the circuit breaker handcart, the middle-placed cabinet further comprises a circuit breaker handcart, and the circuit breaker handcart cannot trigger the contact switch when being installed in place in the accommodating cavity. Thus, the circuit breaker trolley does not trigger the contact switch and can be distinguished from the grounding trolley.

In order to distinguish the grounding handcart from the PT handcart, the centrally installed switchgear further comprises the PT handcart, and the PT handcart cannot trigger the contact switch when being installed in place in the accommodating cavity. Thus the PT hand truck does not trigger the contact switch and can be distinguished from the grounded hand truck.

In order to move the grounding handcart conveniently, the side wall of the grounding handcart is provided with rollers. Through setting up the gyro wheel, be convenient for remove ground connection handcart like this.

Compared with the prior art, the utility model has the advantages that: the position that the trigger piece setting leaned on at the back of ground connection handcart and the space is great on every side, contact switch is auxiliary switch and auxiliary contact is more, it is great and auxiliary contact is more through the space like this, can connect a plurality of contacts to auxiliary switch, for example, can shake when the operating position when the ground connection handcart, many act to auxiliary contact simultaneously, actuating signal can be used for putting into the cabinet inlet wire cabinet in the shutting respectively, segmentation cabinet circuit breaker handcart, make it can't shake into the power transmission, the system ground connection short-circuit accident of having avoided probably maloperation to lead to, the function of putting into the cabinet like this is abundanter.

Drawings

Fig. 1 is a schematic perspective view of a centrally installed switchgear according to an embodiment of the present invention;

FIG. 2 is a perspective view of FIG. 1 with a portion of the sidewall removed;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic view from another angle of FIG. 1;

fig. 5 is an exploded view of the mounting base, contact switch, and pressing member.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Fig. 1 to 5 show a preferred embodiment of the centrally installed switchgear of the present invention.

The centrally installed switchgear comprises a switchgear body 1, a grounding handcart 2, a trigger piece 3, a contact switch 4, a pressing piece 5 and a mounting seat 6.

Wherein, the cabinet body 1 has an accommodating cavity and an opening communicated with the accommodating cavity.

The grounding handcart 2 can enter and exit the containing cavity under the action of external force. The side wall of the grounding handcart 2 is provided with rollers 21 so as to be convenient for entering and exiting the accommodating cavity of the cabinet body 1.

The trigger piece 3 is arranged at the back of the cabinet body 1; the trigger 3 is disposed on the back of the grounded hand truck 2. Preferably, the triggering member 3 is a bolt fixed on the back of the grounded handcart 2.

A contact switch 4 is arranged in the accommodating cavity of the cabinet body 1, and the contact switch 4 can be triggered by the trigger piece 3 when the grounding handcart 2 is installed in place. Preferably, the contact switch 4 is an auxiliary switch.

The pressing piece 5 is arranged on the front side of the contact switch 4 along the handcart withdrawing direction, the area of one side of the pressing piece 5 facing the trigger piece 3 is larger than the contact area of the trigger piece 3 and the pressing piece 5, and the trigger piece 3 faces the middle part of the pressing piece 5; when the grounding handcart 2 is not installed in place, the pressing piece 5 does not trigger the contact switch 4. When the grounding handcart 2 is installed in place, the trigger piece 3 acts on the pressing piece 5, and the pressing piece 5 triggers the contact switch 4. In the present embodiment, the pressing member 5 may be plate-shaped or block-shaped. The pressing piece 5 extends left and right, the end part of the pressing piece 5 is provided with a pin 51 inserted into the mounting hole 61 of the mounting seat 6, and the free end of the pin 51 is bent and fixed on the mounting seat 6 after the pin is inserted into the mounting hole 61; the pin 51 has a play in the mounting hole 61 so that the pressing member 5 can be pushed by the trigger 3 to trigger the contact switch 4. The pins 51 are provided in plurality and spaced up and down so that the pressing pieces 5 are stably connected.

A mounting seat 6 is provided in the accommodation chamber, the mounting seat 6 being used for mounting the contact switch 4 and the pressing piece 5.

The centrally installed switchgear further comprises a circuit breaker handcart, and when the circuit breaker handcart is installed in place in the accommodating cavity, the contact switch 4 cannot be triggered.

The centrally installed switchgear further comprises a PT handcart, and when the PT handcart is installed in place in the accommodating cavity, the PT handcart cannot trigger the contact switch 4.

The use principle and the working process of the centrally installed switchgear are as follows.

Through setting up the bolt at the back of ground connection handcart 2, and the bolt is not installed to circuit breaker handcart and PT handcart, only ground connection handcart 2 can trigger contact switch 4 like this to can realize discerning and shake into whether the handcart is the ground connection handcart. The contact switch 4 adopts an auxiliary switch, the action signal of the auxiliary switch is accurate and reliable, the possible fault of artificial judgment is avoided, and the identification problem of the grounding handcart is effectively solved.

When the grounding handcart 2 is installed in place, the bolt abuts against the pressing piece 5, and the pressing piece 5 moves towards the contact switch 4 to trigger the contact switch 4. Therefore, the auxiliary switch can be pressed only when the grounding handcart is completely shaken into the working position, so that the grounding handcart can be ensured to be shaken into a position, the virtual contact condition is avoided, and the 'zero potential' safety maintenance environment is reliably ensured.

Trigger 3 sets up the position that leans on at the back of ground connection handcart 2 and the space is great on every side, contact switch 4 is auxiliary switch and auxiliary contact is more, it is great and auxiliary contact is more like this through the space, can connect a plurality of contacts to auxiliary switch, for example can shake when the operating position as ground connection handcart 2, many act to auxiliary contact simultaneously, actuating signal can be used for respectively shutting in put the cabinet incoming line cabinet, segmentation cabinet circuit breaker handcart, make it can't shake into the power transmission, the system ground connection short-circuit accident of having avoided probably maloperation to lead to, the function is abundanter like this.

Claims

1. A centrally installed switchgear comprises

The cabinet body (1) is provided with an accommodating cavity and an opening communicated with the accommodating cavity;

the grounding handcart (2) can enter and exit the accommodating cavity under the action of external force;

the trigger piece (3) is arranged on the back of the cabinet body (1);

the contact switch (4) is arranged in the accommodating cavity of the cabinet body (1), and the contact switch (4) can be triggered by the trigger piece (3) when the grounding handcart (2) is installed in place;

the method is characterized in that:

the trigger piece (3) is arranged at a position on the back of the grounding handcart (2);

the contact switch (4) is an auxiliary switch.

2. The centrally-mounted cabinet according to claim 1, characterized in that: the trigger piece (3) is a bolt fixed on the back of the grounding handcart (2).

3. The centrally-mounted cabinet according to claim 1, characterized in that: the handcart withdrawing device further comprises a pressing piece (5) arranged on the front side of the contact switch (4) along the handcart withdrawing direction, the area of one side, facing the trigger piece (3), of the pressing piece (5) is larger than the contact area of the trigger piece (3) and the pressing piece (5), and the trigger piece (3) faces the middle part of the pressing piece (5);

when the grounding handcart (2) is not installed in place, the pressing piece (5) can not trigger the contact switch (4),

when the grounding handcart (2) is installed in place, the trigger piece (3) acts on the pressing piece (5), and the pressing piece (5) triggers the contact switch (4).

4. The centrally-mounted cabinet according to claim 3, characterized in that: the pressing piece (5) is plate-shaped or block-shaped.

5. The centrally-mounted cabinet according to claim 3, characterized in that: the contact switch is characterized by further comprising a mounting seat (6) arranged in the accommodating cavity, wherein the mounting seat (6) is used for mounting the contact switch (4) and the pressing piece (5).

6. The centrally-mounted cabinet according to claim 5, characterized in that: the pressing piece (5) extends left and right, the end part of the pressing piece (5) is provided with a pin (51) inserted into the mounting hole (61) of the mounting seat (6), and the free end of the pin (51) is bent and fixed on the mounting seat (6) after the pin is inserted into the mounting hole (61);

the pin (51) has a clearance in the mounting hole (61) so that the pressing member (5) can be pushed by the trigger member (3) to trigger the contact switch (4).

7. The centrally-mounted cabinet according to claim 6, characterized in that: the pins (51) are provided in plurality and are arranged at intervals in the vertical direction.

8. The centrally-mounted cabinet according to any one of claims 1 to 4, characterized in that: the centrally installed switchgear further comprises a circuit breaker handcart, and the circuit breaker handcart cannot trigger the contact switch (4) when being installed in place in the accommodating cavity.

9. The centrally-mounted cabinet according to any one of claims 1 to 4, characterized in that: the centrally installed switchgear further comprises a PT handcart, and the PT handcart cannot trigger the contact switch (4) when being installed in place in the accommodating cavity.

10. The centrally-mounted cabinet according to any one of claims 1 to 4, characterized in that: and the side wall of the grounding handcart (2) is provided with a roller (21).