Electric control box of medium-voltage circuit breaker

Abstract

The utility model discloses an electric control box of a medium-voltage circuit breaker, which is characterized in that the electric control box comprises an independent control box and an independent motor box, the independent control box and the independent motor box are respectively provided with an inner cavity and a switch door, and a plurality of control devices and a plurality of wiring terminals are arranged in the independent control box. An avoiding hole and a plurality of first through holes are formed in the rear side wall of the independent control box, a rotating handle is arranged on an opening and closing door of the independent control box, and an extending clamping block extending into an inner cavity of the independent control box is arranged at the rear end of the rotating handle; an electric operating mechanism is arranged in an inner cavity of the independent motor box, and a second through hole for the power output end of the electric operating mechanism to extend out is formed in the rear side wall of the independent motor box. The electric control box can be directly hung on the original door plate of the switch cabinet, does not occupy the space in the switch cabinet, is convenient and rapid to transform, and can be suitable for transforming various different switch cabinets.

Description

Technical Field

[0001] The utility model relates to the field of switch cabinets, in particular to an electric control box for a medium-voltage circuit breaker. Background Art

[0002] KYN27 armored removable AC metal-enclosed switchgear (KYN cabinet for short) plays an important role in the power system and is widely used in substations. Like other products, KYN cabinets are constantly improving their functions in practice to meet user requirements. In recent years, from the perspective of operator safety and improving operating efficiency, users have increasingly demanded the use of electric-operated circuit breaker trolleys to push and withdraw from KYN cabinets, prompting manufacturers to further improve the functions of KYN cabinets and configure electric chassis vehicles in newly designed KYN cabinets to meet user requirements. However, there are still a large number of old equipment in operation, which require special personnel to use special operating handles to swing the circuit breaker trolley into the working position or out to the test position. In order to reduce manpower and improve protective measures, a large number of equipment in operation need to be modified.

[0003] However, the original cabinet itself cannot be operated electrically. If the solution of directly converting the manual chassis vehicle into an electric chassis vehicle is adopted, the interior of the cabinet needs to be modified. Since there are many KYN cabinet manufacturers, the chassis vehicles and cabinet structures used are diverse, the modification is difficult, and there is also the problem of affecting the cabinet quality assurance after the cabinet modification.

[0004] Therefore, other manufacturers currently install the electric operating mechanism on the outside of the KYN circuit breaker door panel, such as a switch cabinet with an electric operating device disclosed on June 16, 2020 and with a publication number of CN111293622A, which includes a cabinet body and a transport vehicle for carrying electrical equipment, the cabinet body is provided with a cabinet door, the transport vehicle includes a vehicle body, an end beam and a screw rod, the end beam is provided on the cabinet body, one end of the screw rod is provided on the vehicle body, and the other end passes through the vehicle body and is provided on the end beam, and also includes an electric operating device, the electric operating device is connected to the screw rod and drives the screw rod to make the vehicle body slide relative to the end beam, the electric operating device is provided on the cabinet door and is detachably connected to the cabinet door. However, the electric operating mechanism and operating hole of this structure are exposed to the outside, which poses operational risks and safety hazards.

[0005] Some companies will also adopt the method of replacing door panels, or installing electric operating mechanisms and other control devices required for centralized control on the original door panels for modification. However, the accessories on the original door panels may be special accessories or discontinued accessories. These accessories are difficult to purchase or may even be unavailable when replacing door panels. If various devices are directly installed on the original door panels, there will be a problem of insufficient space in the cabinet, and the modification is troublesome and takes a long time. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an electric control box for a medium-voltage circuit breaker, which can be directly hung on the original door panel of a switch cabinet, does not occupy the space inside the switch cabinet, is convenient and quick to modify, and can be suitable for modifying various different switch cabinets.

[0007] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0008] A medium-voltage circuit breaker electric control box, characterized in that it includes an independent control box and an independent motor box, the independent control box and the independent motor box are respectively provided with an inner cavity and a switch door, a plurality of control devices and a plurality of wiring terminals are provided in the independent control box, a rear side wall of the independent control box is provided with an avoidance hole and a plurality of first through holes, a rotating handle is provided on the switch door of the independent control box, and an extension block extending into the inner cavity of the independent control box is provided at the rear end of the rotating handle; an electric operating mechanism is provided in the inner cavity of the independent motor box, and a second through hole extending from a power output end of the electric operating mechanism is provided on the rear side wall of the independent motor box.

[0009] The electric control box is divided into an independent control box and a motor box. When installing, it is only necessary to open a mounting hole and a wire hole on the door panel. After wiring, the independent control box and the independent motor box can be directly hung on the door panel to quickly complete the installation. Among them, the control device and the wiring terminal in the independent control box can be wired with the components in the switch cabinet through the first through hole and the wire hole on the door panel; the original emergency opening handle on the door panel can be extended into the inner cavity of the independent control box through the avoidance hole, and the rotating handle on the switch door of the independent control box can be engaged with the emergency opening handle through the extension block; the signal input end of the electric operating mechanism can be electrically connected to the control device in the independent control box through the line, and the power output end of the electric operating mechanism can be connected to the rotating shaft of the chassis vehicle through the inlet and outlet hole on the door panel. This electric control box can be installed on the door panel through external modification, and the component control box of the switch cabinet and the electric control box of the chassis vehicle are convenient for control and electric control of the chassis vehicle. During the modification, it will not occupy the space inside the switch cabinet, and the modification is convenient and fast, and can be applied to the modification of switch cabinets produced by various manufacturers.

[0010] The electric operating mechanism can adopt the same structure as the electric operating device in CN111293622A; the types and quantities of the control components and wiring terminals in the control box can be configured accordingly according to the types of different switch cabinets.

[0011] In a preferred embodiment, a covering groove is provided at the rear end of the extension block, and a notch extending to the rear end is provided on the side wall of the extension block. The extension block can clamp the main body and handle part of the emergency opening handle by covering the groove and the notch, and when the rotary handle rotates, the emergency opening handle can be smoothly driven to rotate together.

[0012] In a preferred embodiment, the switch door of the independent control box is provided with a plurality of switches and display windows electrically connected to the control device. When controlling the switch cabinet, the switches on the switch door of the independent control box can be directly operated; the display window can display various parameters in the cabinet, and usually, the display window can also be opened, and a control button is provided at the corresponding position after opening.

[0013] In a preferred embodiment, the switch doors of the independent control box and the independent motor box are respectively provided with switch door locks. When no maintenance is required, the switch door locks can be locked to prevent unauthorized operation.

[0014] The beneficial effect of the utility model is that the electric control box can be directly hung on the original door panel of the switch cabinet, does not occupy the space inside the switch cabinet, is convenient and quick to modify, and can be applicable to modify various switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the electric control box in the embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the electric control box when the switch door is opened in the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the rotating handle in the embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of an independent control box and an independent motor box installed on a door panel in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] like Figure 1-3 A medium-voltage circuit breaker electric control box shown in the figure includes an independent control box 1 and an independent motor box 2. The independent control box 1 and the independent motor box 2 are respectively provided with an inner cavity 121 and a switch door 122. A plurality of control devices 101 and a plurality of wiring terminals 102 are provided in the independent control box 1. The rear side wall of the independent control box 1 is provided with an avoidance hole 103 and a plurality of first through holes (not visible in the figure). A rotating handle 104 is provided on the switch door 122 of the independent control box 1. An extension block 1041 extending into the inner cavity 121 of the independent control box 1 is provided at the rear end of the rotating handle 104; an electric operating mechanism 201 is provided in the inner cavity 121 of the independent motor box 2, and a second through hole 202 extending from the power output end of the electric operating mechanism 201 is provided on the rear side wall of the independent motor box 2.

[0021] The electric control box is divided into an independent control box and a motor box. When installing, it is only necessary to open a mounting hole and a wire hole on the door panel 3. After wiring, the independent control box 1 and the independent motor box 2 can be directly hung on the door panel 3 to quickly complete the installation. Among them, the control device 101 and the wiring terminal 102 in the independent control box 1 can be wired with the components in the switch cabinet through the first through hole and the wire hole on the door panel 3; the original emergency opening handle on the door panel 3 can be extended into the inner cavity 121 of the independent control box 1 through the avoidance hole 103, and the rotating handle 104 on the switch door 122 of the independent control box 1 can be engaged with the emergency opening handle through the extension block 1041; the signal input end of the electric operating mechanism 201 can be electrically connected to the control device 101 in the independent control box 1 through the line, and the power output end of the electric operating mechanism 201 can be connected to the rotating shaft of the chassis vehicle through the inlet and outlet hole on the door panel 3. This electric control box can be installed on the door panel 3 by means of external modification, so that the component control box of the switch cabinet and the electric control box of the chassis vehicle can be easily controlled and the electric control of the chassis vehicle can be realized. During the modification, the space inside the switch cabinet will not be occupied, and the modification is convenient and fast, and it can be applied to the modification of switch cabinets produced by various manufacturers.

[0022] The electric operating mechanism 201 can adopt the same structure as the electric operating device in CN111293622A; the types and quantities of the control device 101 and the wiring terminals 102 in the control box can be configured accordingly according to the types of different switch cabinets.

[0023] The rear end of the extension block 1041 is provided with a covering groove 10411, and the side wall of the extension block 1041 is provided with a notch 10412 extending to the rear end. The extension block 1041 can clamp the main body and handle part of the emergency opening handle by covering the groove 10411 and the notch 10412, and when the rotary handle 104 rotates, it can smoothly drive the emergency opening handle to rotate together.

[0024] The switch door 122 of the independent control box 1 is provided with a plurality of switches 105 and a display window 106 electrically connected to the control device 101. When controlling the switch cabinet, the switch 105 on the switch door 122 of the independent control box 1 can be directly operated; the display window 106 can display various parameters in the cabinet, and usually, the display window 106 can also be opened, and a control button is provided at the corresponding position after opening.

[0025] The switch doors 122 of the independent control box 1 and the independent motor box 2 are respectively provided with switch door locks 123. When no maintenance is required, the switch door locks 123 can be locked to prevent unauthorized operation.

Claims

1. A medium voltage circuit breaker electric control box, characterized in that: It includes an independent control box and an independent motor box. The independent control box and the independent motor box are respectively provided with an inner cavity and a switch door. The independent control box is provided with multiple control devices and multiple wiring terminals. The rear side wall of the independent control box is provided with an avoidance hole and multiple first through holes. The switch door of the independent control box is provided with a rotating handle. The rear end of the rotating handle is provided with an extension block extending into the inner cavity of the independent control box; the inner cavity of the independent motor box is provided with an electric operating mechanism, and the rear side wall of the independent motor box is provided with a second through hole through which the power output end of the electric operating mechanism extends.

2. The electric control box for a medium voltage circuit breaker according to claim 1, characterized in that: The rear end of the extension block is provided with a covering groove, and the side wall of the extension block is provided with a notch extending to the rear end.

3. The electric control box for a medium voltage circuit breaker according to claim 1, characterized in that: The switch door of the independent control box is provided with a plurality of switches and display windows electrically connected with the control device.

4. The electric control box for a medium voltage circuit breaker according to claim 1, characterized in that: The switch doors of the independent control box and the independent motor box are respectively provided with switch door locks.

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