CN220896133U

CN220896133U - Drawer cabinet

Info

Publication number: CN220896133U
Application number: CN202322422487.XU
Authority: CN
Inventors: 龚进; 马健; 陶震宁
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-05-03
Anticipated expiration: 2033-09-07

Abstract

A drawer cabinet belongs to the technical field of low-voltage power distribution cabinets. Including the cabinet body and set up at the internal drawer unit of cabinet, drawer unit include the drawer bottom plate be provided with the circuit breaker mounting panel on the drawer bottom plate perpendicularly, the circuit breaker mounting panel on be provided with the circuit breaker, the circuit breaker have circuit breaker lead-in terminal and circuit breaker play line end drawer bottom plate on and be provided with first insulation board under corresponding to circuit breaker lead-in terminal, and be provided with the second insulation board under corresponding to circuit breaker play line end. The advantages are that: interphase and earth arc of the wire inlet side circuit and the wire outlet side circuit inside the drawer unit are effectively blocked, arc protection and isolation are formed, explosion phenomenon caused by arcing short circuit of a primary loop is prevented, and therefore insulation coordination performance inside the drawer unit can be improved, and safe and stable operation of the drawer cabinet is ensured.

Description

Drawer cabinet

Technical Field

The utility model belongs to the technical field of low-voltage power distribution cabinets, and particularly relates to a drawer cabinet.

Background

The low-voltage power distribution cabinet is an important component of the whole low-voltage power supply system and is widely applied to power distribution and control centers in the fields of various large power plants, petroleum and petrochemical industry, national power grids, data centers and the like. In the application of the existing low-voltage distribution system, the most common voltage level of an industrial electric device is 400V, and with the rapid development of the industry at home and abroad, electric staff often puzzles with problems such as loss and voltage drop in the process of project construction and production operation, so that the equipment operation efficiency is improved, the production operation and maintenance cost is reduced, and more high-end users require that the low-voltage switch cabinet can meet the 690V system working voltage. The drawer type switch cabinet (abbreviated as drawer cabinet) is convenient to overhaul and maintain, has higher reliability, safety and interchangeability, is a relatively advanced switch cabinet, but for the structure of a 690V system of an outgoing line functional unit in a low-voltage drawer cabinet, particularly a drawer functional unit, because the specifications of built-in components limited by the 690V system are very few and relatively immature in the market, and the drawer space structure is a shaped product of a 400V system, the drawer space structure cannot be expanded at all at present, the defect can often directly lead to poor internal insulation matching performance of the drawer cabinet applying the 690V system, so that the current practical application of the drawer cabinet capable of meeting the working voltage of the 690V system is not very much, and even if engineering application exists, considerable risks exist.

In view of the foregoing, there is a need for an improvement in the structure of existing drawers, and for this purpose, the present inventors have devised beneficial designs, and the technical solutions described below are created in this context.

Disclosure of utility model

The utility model aims to provide a drawer cabinet which can improve the insulation matching performance and ensure that switching equipment can continuously and safely run.

The utility model aims to achieve the purpose, and the drawer cabinet comprises a cabinet body and a drawer unit arranged in the cabinet body, wherein the drawer unit comprises a drawer bottom plate, a breaker mounting plate is vertically arranged on the drawer bottom plate, a breaker is arranged on the breaker mounting plate, and the breaker is provided with a breaker wire inlet end and a breaker wire outlet end and is characterized in that: a first insulating plate is arranged on the drawer bottom plate and right below the lead-in end of the circuit breaker, and a second insulating plate is arranged right below the lead-out end of the circuit breaker.

In a specific embodiment of the present utility model, the first insulating plate and the second insulating plate are integrally formed.

In another specific embodiment of the present utility model, the drawer unit further includes a drawer panel, a pair of drawer side plates, and a drawer back plate vertically disposed on the drawer bottom plate, wherein the drawer panel and the drawer back plate are respectively located at a front side and a back side of the pair of drawer side plates, and the drawer panel, the drawer side plates, the drawer back plate, and the drawer bottom plate enclose a drawer cavity.

In another specific embodiment of the utility model, the drawer back plate is provided with a primary terminal at the wire inlet side and a primary terminal at the wire outlet side, the primary terminal at the wire inlet side is connected with the wire inlet end of the circuit breaker through a bus at the wire inlet side to form a circuit at the wire inlet side, and the primary terminal at the wire outlet side is connected with the wire outlet end of the circuit breaker through a bus at the wire outlet side to form a circuit at the wire outlet side.

In still another specific embodiment of the present utility model, the bus heat shrink tube is sleeved on each of the incoming bus and the outgoing bus.

In a further specific embodiment of the present utility model, an insulating baffle is disposed on one drawer side plate of the pair of drawer side plates, which is close to the arc spraying port on the outlet side of the circuit breaker, for preventing short circuit on the drawer side plate after arc spraying.

In a further specific embodiment of the utility model, the upper cover of the incoming line end of the circuit breaker is provided with a zero arcing cover.

In a further embodiment of the utility model, spaced arc pieces are arranged between adjacent phases of the inlet end of the circuit breaker and between adjacent phases of the outlet end of the circuit breaker.

In yet another specific embodiment of the present utility model, an end of the first insulating plate away from the second insulating plate extends below the incoming line side bus bar, and an end of the second insulating plate away from the first insulating plate extends below the outgoing line side bus bar.

In yet another specific embodiment of the present utility model, the first insulating plate and the second insulating plate have the same width, the rear end extends to the circuit breaker mounting plate, and the front end extends below the front side of the circuit breaker.

Due to the adoption of the structure, compared with the prior art, the utility model has the beneficial effects that: by additionally arranging the incoming line side insulating plate, the outgoing line side insulating plate and the insulating baffle, the insulation distance range of the circuit can be increased in an auxiliary manner, interphase and earth arcs of the incoming line side circuit and the outgoing line side circuit in the drawer unit are effectively blocked, arc protection and isolation are formed, the phenomenon that the primary loop is in arcing short circuit and explosion occurs is prevented, and therefore the insulation coordination performance in the drawer unit can be improved, the requirement of rated insulation voltage 800V is met, and safe and stable operation of the drawer cabinet is guaranteed; bus heat shrinkage tubes are sleeved on the surfaces of the incoming line side bus and the outgoing line side bus, and the bus heat shrinkage tubes extend to the circuit breaker incoming line end and the circuit breaker outgoing line end, so that an electric gap can be increased in an auxiliary mode, and interphase short circuit is prevented; the zero arcing cover can effectively avoid the short circuit phenomenon possibly generated by the bus on the wire inlet side and the connecting bolt to surrounding metal plates.

Drawings

FIG. 1 is a top view of a drawer unit according to the present utility model;

Fig. 2 is a front cross-sectional view of the drawer unit of the present utility model.

In the figure: 1. drawer units, 11, a drawer bottom plate, 12, a drawer panel, 13, a drawer side plate, 14, a drawer rear plate and 15, a breaker mounting plate; 2. a primary terminal at the wire inlet side; 3. a primary terminal on the outgoing line side; 4. the circuit breaker comprises a circuit breaker body, a circuit breaker arc spacing sheet, a circuit breaker inlet end, a circuit breaker outlet end, a base and a switching handle, wherein the circuit breaker arc spacing sheet and the circuit breaker arc spacing sheet are arranged at intervals; 5. a wire inlet side bus; 6. a wire-outlet-side bus; 7. an incoming line side insulating plate; 8. an outgoing line side insulating plate; 10. an insulating baffle; 20. a bus heat shrinkage tube; 30. zero arcing cover.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

Referring to fig. 1 and 2, the present utility model relates to a drawer cabinet, which includes a cabinet body (not shown) and a plurality of drawer units 1 disposed inside the cabinet body. The drawer unit 1 includes a drawer bottom plate 11, a drawer face plate 12, a pair of drawer side plates 13, and a drawer rear plate 14, the drawer face plate 12, the drawer side plates 13, and the drawer rear plate 14 are vertically disposed on the drawer bottom plate 11, and the drawer face plate 12 and the drawer rear plate 14 are respectively disposed on the front side and the rear side of the pair of drawer side plates 13. The drawer bottom plate 11, the drawer face plate 12, the drawer side plate 13 and the drawer back plate 14 are jointly enclosed to form a drawer cavity capable of containing a plurality of electric elements, and the drawer face plate 12 is positioned at the front part of the drawer mechanism 1 and faces an operator.

The drawer bottom plate 11 is provided with a circuit breaker mounting plate 15 in the middle and close to a drawer side plate 13 in a manner perpendicular to the drawer bottom plate 11 and the drawer side plate 13, and in the drawer cavity, one side of the circuit breaker mounting plate 15 facing the drawer rear plate 14 is formed into a primary plug-in mounting area, and one side facing the drawer panel 12 is formed into a circuit breaker mounting area. The breaker mounting plate 15 is fixed with a breaker 4 facing the breaker mounting area, and the breaker 4 is provided with a breaker incoming line end 41 and a breaker outgoing line end 42. A spacing arc 40 is provided between adjacent phases of the circuit breaker inlet 41 and outlet 42 to prevent short circuit caused by inter-phase arcing.

Specifically, the bottom of the base 43 of the circuit breaker 4 is attached to the circuit breaker mounting board 15, the circuit breaker 4 is provided with a closing and opening handle 44 for receiving external force to operate to close and open the gate, and the closing and opening handle 44 is arranged towards one side of the drawer panel 12. In this embodiment, the circuit breaker 4 is a three-stage circuit breaker, that is, the circuit breaker wire inlet end 41 and the circuit breaker wire outlet end 42 are respectively three, and the projections of each circuit breaker wire inlet end 41 in the direction of the drawer bottom plate 11 overlap, and the projections of each circuit breaker wire outlet end 42 in the direction of the drawer bottom plate 11 overlap.

The drawer back plate 14 is provided with a primary terminal 2 at the inlet side towards the primary plug-in installation area on one side corresponding to the inlet terminal 41 of the circuit breaker in the length direction, and a primary terminal 3 at the outlet side towards the primary plug-in installation area on one side corresponding to the outlet terminal 42 of the circuit breaker in the length direction. The primary incoming-line terminal 2 is connected with the incoming-line end 41 of the circuit breaker through the incoming-line bus 5 to form an incoming-line side circuit, and the primary outgoing-line terminal 3 is connected with the outgoing-line end 42 of the circuit breaker through the outgoing-line bus 6 to form an outgoing-line side circuit.

Further, a first insulating plate 7 is disposed on the drawer bottom 11 and right under the circuit breaker wire inlet end 41, and a second insulating plate 8 is disposed right under the circuit breaker wire outlet end 42. In this embodiment, the first insulating plate 7 and the second insulating plate 8 are integrally formed, and the width is preferably not smaller than the width of the circuit breaker 4, that is, the rear ends of the first insulating plate 7 and the second insulating plate 8 extend to the circuit breaker mounting plate 15, and the front ends extend below the front side surface of the circuit breaker 4; in the length direction, the first insulating plate 7 preferably extends below the incoming-line-side bus bar 5, and the second insulating plate 8 preferably extends below the outgoing-line-side bus bar 6.

Further, the breaker mounting plate 15 is disposed perpendicular to the drawer side plate 13, so that the arc spraying opening on the outlet side of the breaker 4 faces an adjacent drawer side plate 13, which is a drawer side plate 13 near the inlet end 41 of the breaker. In the present embodiment, in order to prevent short circuit from being caused in the drawer side plate 13 after arc discharge, an insulating barrier 10 is provided in the drawer side plate 13. The insulating barrier 10 also prevents the line-side bus 5 from being shorted by the arc striking the drawer side plate 13 and bouncing.

Further, the bus heat shrinkage tube 20 is sleeved on the surfaces of the incoming line side bus 5 and the outgoing line side bus 6, the bus heat shrinkage tube 20 is installed in a baking sleeve mode and extends to the circuit breaker incoming line end 41 and the circuit breaker outgoing line end 42 as far as possible, so that an electric gap is increased in an auxiliary mode, and interphase short circuit is prevented.

Furthermore, the circuit breaker incoming line end 41 is covered with the zero arcing cover 30, so that the short circuit phenomenon possibly generated by the incoming line side bus 5 and the connecting bolt to surrounding metal plates can be effectively avoided.

Claims

1. The utility model provides a drawer cabinet, includes the cabinet body and sets up drawer unit (1) in the cabinet body, drawer unit (1) include drawer bottom plate (11) on be provided with circuit breaker mounting panel (15) perpendicularly, circuit breaker mounting panel (15) on be provided with circuit breaker (4), circuit breaker (4) have circuit breaker wire inlet end (41) and circuit breaker wire outlet end (42), its characterized in that: a first insulating plate (7) is arranged on the drawer bottom plate (11) and corresponds to the position right below the circuit breaker wire inlet end (41), and a second insulating plate (8) is arranged corresponding to the position right below the circuit breaker wire outlet end (42).

2. A drawer cabinet according to claim 1, characterized in that the first insulating plate (7) and the second insulating plate (8) are of unitary construction.

3. The drawer cabinet according to claim 1, wherein the drawer unit (1) further comprises a drawer panel (12), a pair of drawer side plates (13) and a drawer back plate (14) vertically disposed on the drawer bottom plate (11), the drawer panel (12) and the drawer back plate (14) are respectively disposed on the front side and the back side of the pair of drawer side plates (13), and the drawer panel (12), the drawer side plates (13), the drawer back plate (14) and the drawer bottom plate (11) enclose a drawer cavity.

4. A drawer cabinet according to claim 3, characterized in that the drawer rear plate (14) is provided with a primary incoming-line-side terminal (2) and a primary outgoing-line-side terminal (3), the primary incoming-line-side terminal (2) is connected with the incoming-line end (41) of the circuit breaker through an incoming-line-side bus bar (5) to form an incoming-line-side circuit, and the primary outgoing-line-side terminal (3) is connected with the outgoing-line end (42) of the circuit breaker through an outgoing-line-side bus bar (6) to form an outgoing-line-side circuit.

5. The drawer cabinet according to claim 4, wherein the incoming line side bus bar (5) and the outgoing line side bus bar (6) are respectively sleeved with a bus bar heat shrinkage tube (20).

6. A drawer cabinet according to claim 3, characterized in that an insulating barrier (10) is provided on one drawer side plate (13) of the pair of drawer side plates (13) near the outlet side arc spraying opening of the circuit breaker for preventing short circuit on the drawer side plate (13) after arc spraying.

7. Drawer cabinet according to claim 1, characterized in that the upper cover of the incoming line end (41) of the circuit breaker is provided with a zero arcing cover (30).

8. Drawer cabinet according to claim 1, characterized in that phase-separated arc pieces (40) are arranged between adjacent phases of the incoming line end (41) and between adjacent phases of the outgoing line end (42) of the circuit breaker.

9. A drawer cabinet according to claim 4, characterized in that the end of the first insulating plate (7) remote from the second insulating plate (8) extends below the incoming line side busbar (5), and the end of the second insulating plate (8) remote from the first insulating plate (7) extends below the outgoing line side busbar (6).

10. Drawer cabinet according to claim 1, characterized in that the first insulating plate (7) and the second insulating plate (8) have identical widths, the rear end extending to the circuit breaker mounting plate (15) and the front end extending below the front side of the circuit breaker (4).