CN204680978U - Portable type direct-current traction power supply switchgear - Google Patents

Abstract

The utility model discloses a convenient DC traction power supply switchgear. It includes a cabinet and a handcart. The cabinet is composed of four parts: circuit breaker room, low voltage room, busbar room, cable room and high voltage room; the circuit breaker room is set at the front lower part of the cabinet body, and the low voltage room is set at the front upper part of the cabinet body , low-voltage components and control and protection devices are installed in the low-voltage room; the busbar room and cable room are set at the rear of the cabinet, the main busbar and primary high-voltage terminals are installed in the busbar room, the high-voltage room is set at the rear upper part of the cabinet, and the high-voltage room is set. For the high-voltage detection element, a handcart room is formed under the circuit breaker room, and the handcart can be pushed in and out of the handcart room. After the above-mentioned structure is adopted, the high-voltage detection element and necessary components are arranged in the cabinet, which reduces the volume and weight of the handcart, ensures the reliability of operation, and reduces the cost of the handcart. Its structure The design is ingenious and reasonable, the space utilization is compact, and the operation and maintenance are convenient, which meets the requirements of use.

Description

Convenient DC traction power supply switchgear

technical field

The utility model relates to a safety protection switchgear for urban rail, in particular to a convenient DC traction power supply switchgear.

Background technique

The power supply voltage of urban trams is generally DC 750V, and the power supply current is generally less than 2600A. At present, the main domestic DC switchgears are mainly used for high-current and heavy-load applications such as subways. For the traction system, there is a lack of products specially designed for the low load of trams, and there is no DC switchgear specially designed for trams. Usually, the existing large-volume and high-cost switchgear is used. Traditional handcart switchgear, including The cabinet and the handcart that can be pushed out of the cabinet are installed with circuit breakers. Traditionally, the essential high-voltage detection components are installed on the driver. On the one hand, the volume of the handcart is increased and the handcart is heavier. weight, it is inconvenient to push and push out. On the other hand, there is also the plug-in part of the secondary component that matches the cabinet, which reduces the reliability of operation. In addition, the existing switchgear generally has a spare handcart. The handcart also needs to have a high-voltage detection element, resulting in a waste of cost.

Contents of the invention

The technical problem to be solved by the utility model is to provide a handcart with simple and compact structure, small volume, reliable operation and low operating cost, which can be widely used in low-load DC traction power supply system and convenient DC traction power supply switchgear.

In order to solve the above-mentioned technical problems, the convenient DC traction power supply switchgear of the utility model includes a cabinet body and a handcart. The cabinet body is composed of four parts: It is set at the front lower part of the cabinet, and the low-voltage room is set at the front upper part of the cabinet. The low-voltage room is installed with low-voltage components and control protection devices; the busbar room and cable room are set at the rear of the cabinet, and the busbar room is installed with the main busbar and primary High-voltage terminals, the high-voltage chamber is set at the rear upper part of the cabinet, the high-voltage chamber is equipped with high-voltage detection components, and a handcart chamber is formed under the circuit breaker chamber, and the handcart can be pushed in and out of the handcart chamber.

An isolating switch is installed in the busbar room.

The breaker room and the low-voltage room are respectively provided with independent room doors.

Guide rails are installed on the inner walls of both sides of the circuit breaker chamber, and guide and support surfaces matched with the guide rails are arranged on both sides of the handcart.

The front end of the guide rail is provided with a guide slope that can push the handcart into the handcart chamber smoothly.

After adopting the above structure, since the cabinet consists of four parts: circuit breaker room, low voltage room, bus room, cable room and high voltage room, the main busbar and primary high voltage terminals are installed in the bus room, and the high voltage room is set at the rear upper part of the cabinet , the high-voltage chamber is equipped with a high-voltage detection element, and the high-voltage detection element and necessary components are arranged in the cabinet, which reduces the volume and weight of the handcart and ensures the reliability of the operation. At the same time, the spare handcart does not need The installation of high-voltage detection components reduces the cost of the handcart; in addition, a handcart room is formed under the circuit breaker room, and guide rails are installed on the inner walls of both sides of the circuit breaker room. It can easily push in and out of the circuit breaker room, which has the advantages of easy and convenient operation, high transmission efficiency, and accurate positioning, which reduces the workload of on-site maintenance personnel. Withdraw from the handcart operation, its structural design is ingenious and reasonable, the space utilization is compact, the operation and maintenance are convenient, and it meets the requirements of use.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model's convenient DC traction power supply switchgear.

Detailed ways

The following is a further detailed description of the convenient DC traction power supply switchgear of the present invention in combination with the accompanying drawings and specific implementation methods.

As shown in the figure, the convenient DC traction power supply switchgear of the utility model, the convenient DC traction power supply switchgear, includes a cabinet 1 and a handcart 7, and the cabinet 1 is composed of a circuit breaker room 2, a low-voltage room 3, and a busbar room 4 , cable room 5, and high-voltage room 6 are composed of four parts; circuit breaker room 2 is set at the front lower part of the cabinet, low-voltage room 3 is set at the front upper part of the cabinet, and low-voltage components and control protection devices are installed in the low-voltage room; circuit breaker room 2 and The low-voltage chamber 3 is provided with independent chamber doors; the busbar chamber 4 and the cable chamber 5 are arranged at the rear of the cabinet, and the main busbar and primary high-voltage terminals are installed in the busbar chamber 4, which can also be arranged on the busbar according to the needs of users. Indoor installation of isolating switches, etc.; high-voltage chamber 6 is set at the rear upper part of the cabinet, current and voltage measuring devices and line testing devices are installed in the high-voltage chamber, and high-voltage detection elements are also installed in the high-voltage chamber 6, and a handcart is formed under the circuit breaker chamber 2 There are guide rails 9 installed on the inner walls of both sides of chamber 8 and circuit breaker chamber 2, and guide support surfaces that cooperate with the guide rails are provided on both sides of the handcart 7. The front end of guide rail 9 is provided with a guide that can push the handcart into the handcart chamber Inclined surface 10, thus making handcart 7 can be pushed into and out of handcart chamber 8.

Furthermore, the guide rails 9 are fixed on the lower beams on both sides of the circuit breaker chamber 2, and the handcart can be easily changed between the working position and the test position through the guide rails. The handcart maintenance locking module 11 is installed on the front column of the circuit breaker chamber 2 , which is composed of a fixed part installed on the handcart and a rotatable fixed part installed on the left side of the cabinet. Its function is to prevent the handcart from being pulled out of the cabinet by misoperation when the maintenance trolley is not installed, causing accidents.

Claims (5)

1. A convenient DC traction power supply switchgear, including a cabinet (1) and a handcart (7), characterized in that: the cabinet (1) consists of a circuit breaker room (2), a low-voltage room (3), The busbar room (4), the cable room (5), and the high-voltage room (6) are composed of four parts; the circuit breaker room (2) is set at the front lower part of the cabinet, and the low-voltage room (3) is set at the front of the cabinet In the upper part, low-voltage components and control and protection devices are installed in the low-voltage room; the busbar room (4) and cable room (5) are set at the rear of the cabinet, and the main busbar and primary high-voltage terminals are installed in the busbar room (4). The high-voltage chamber (6) is arranged at the rear upper part of the cabinet, and a high-voltage detection element is arranged in the high-voltage chamber (6), and a handcart chamber (8) is formed under the circuit breaker chamber (2), and the handcart (7 ) can be pushed into and out of the handcart chamber (8). 2. The convenient DC traction power supply switchgear according to claim 1, characterized in that: an isolating switch is installed in the busbar room (4). 3. The convenient DC traction power supply switchgear according to claim 1, characterized in that: the circuit breaker chamber (2) and the low-voltage chamber (3) are respectively provided with independent chamber doors. 4. The convenient DC traction power supply switchgear according to claim 1, characterized in that: guide rails (9) are installed on the inner walls of both sides of the circuit breaker chamber (2), and the two sides of the handcart (7) are provided with A guide support surface that cooperates with the guide rail. 5. The convenient DC traction power supply switchgear according to claim 4, characterized in that: the front end of the guide rail (9) is provided with a guide inclined surface (10) that enables the handcart to be smoothly pushed into the handcart chamber.