CN204680568U - Direct current two station disconnecting switch operational lock device - Google Patents

Abstract

The utility model discloses an operation locking device for a DC two-station isolating switch. It includes the switchgear cabinet, the cabinet door on the cabinet body and the two-station isolating switch, the insulation board is installed on the periphery of the two-station isolating switch, the rear end of the operating spindle of the two-station isolating switch is facing the operation hole, and an operating handle Can extend into the operation hole, the cabinet door is provided with an operation locking device, the operation locking device includes a locking operation end and a rotating baffle, the rotating baffle can rotate along the center of the locking operation end and block or leave the operation hole. After the above structure is adopted, the operation locking device must be rotated first to expose the operation hole of the operation locking device, and then the operating handle can be inserted to open and close the two-station isolating switch, which improves the electrical safety. An insulating plate is installed on the periphery of the two-station isolating switch, It further guarantees a high protection level and insulation level, and has a simple structure, simple installation and maintenance, high reliability, and reduces manufacturing costs at the same time.

Description

DC two-position isolating switch operation locking device

technical field

The utility model relates to an isolating switch device suitable for a rail transit traction power supply system, in particular to an operation locking device for a DC two-position isolating switch of a DC traction switch cabinet.

Background technique

With the development of rail transit in China, the focus of users is gradually shifting from technical performance to system security. Traditional DC power supply systems often use isolating switches when electrical isolation is required. In order to save costs, isolating switches are often hung directly on the tunnel wall, which brings hidden dangers to the power supply system and the safety of operators. Therefore, as the urban rail traction power supply system is becoming more and more mature, users are more likely to consider using isolating switch devices that can provide sufficient protection levels to replace traditional solutions. Structural improvement to win the market, but because the structure is relatively simple, there are generally problems such as low protection level and insufficient electrical safety. How to simply and effectively improve the safety and reliability of isolating switch devices on the basis of reducing maintenance costs has become the focus of attention in the industry.

Contents of the invention

The technical problem to be solved by the utility model is to provide a DC two-position isolating switch operating locking device with a simple and reliable structure, which can improve the protection level and electrical safety of the isolating switch device.

In order to solve the above technical problems, the DC two-station isolating switch operating locking device of the utility model includes a switch cabinet body, a cabinet door on the cabinet body, and a two-station isolating switch vertically fixedly installed in the middle of the cabinet frame. Insulating boards are installed on the periphery of the two-station isolating switch. The rear end of the operating spindle of the two-station isolating switch is facing the operation hole on the cabinet door. An operating handle can be inserted into the operation hole to operate the two-station isolating switch. The door is provided with an operation lock device located on one side of the operation hole. The operation lock device includes a lock operation end controlled by a key and a rotating baffle connected to the lock operation end. The rotation baffle can rotate along the center of the lock operation end and Block the operation hole or leave the operation hole.

The cabinet door is provided with a first locking column at a horizontal position and a second locking column at a vertical position, and the rotating baffle has a bayonet, and the rotating baffle can be locked in the horizontal position under the limit of the two locking columns. Rotate between the vertical and vertical positions; when the rotary baffle is in the horizontal position, the lower surface of the rotary baffle is limited on the first locking column, and when the rotary baffle is in the vertical position, it can block the operation hole and make the bayonet limit inside the second locking post.

The cabinet door is provided with an observation window for observing the opening and closing state of the two-station isolating switch.

After adopting the above structure, due to the operation locking device provided on the cabinet door, the operation locking device must be rotated first to expose the operation hole of the operation locking device, and then the operating handle can be inserted to separate and close the two-station isolating switch, which improves the efficiency of the two-station isolating switch. The electrical safety of the device, the insulation board installed on the periphery of the two-position isolating switch further ensures a high level of protection and insulation. It has a simple structure, simple installation and maintenance, high reliability, and reduces manufacturing costs.

Description of drawings

Fig. 1 is a schematic diagram of the main view of the partial structure of the operating locking device of the DC two-position isolating switch of the present invention;

FIG. 2 is a schematic diagram of the enlarged structure at A in FIG. 1;

Fig. 3 is a schematic diagram of the internal partial structure of the operating locking device for the DC two-position isolating switch of the present invention.

Detailed ways

The operation and locking device of the DC two-position isolating switch of the present utility model will be further described in detail in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the DC two-station isolating switch operating locking device of the present utility model includes a switch cabinet body 1, a cabinet door 2 on the cabinet body, and a two-station isolating switch 3 vertically fixed and installed in the middle of the frame of the cabinet body 1. , the isolating switch is connected in series in the electrical circuit through the inlet and outlet lines of the two-position isolating switch, and insulating plates are installed around the isolating switch to ensure high protection and insulation levels. When the cabinet door is opened, the insulating sealing plate will separate the operator and the isolating switch Isolation can ensure the safety of life. When operation and maintenance are required, remove the insulating sealing plate; the rear end of the operating spindle of the two-position isolating switch 3 is facing the operating hole on the cabinet door, and an operating handle 4 can extend into the operating hole The two-station isolating switch 3 is operated inside, and the cabinet door 2 is provided with an operation locking device located on the side of the operation hole. The operation locking device includes a locking operation end 5 controlled by a key and a rotating baffle connected to the locking operation end 6. The rotating baffle 6 can rotate along the center of the locking operation end 5 and block the operation hole or leave the operation hole. The cabinet door 2 is provided with an observation window 9 for easy observation of the opening and closing state of the two-station isolating switch; under normal circumstances, the operation lock The device keeps the operating hole in a closed state, and the operating handle cannot be inserted to operate the two-position isolating switch. When operating, first rotate the operating locking device to expose the operating hole of the operating locking device, and then insert the operating handle to open and close the two-position isolating switch Brake operation, when the operation is over, use the key to close the operation hole with the operation locking device, and also play a safety interlock function. In addition, the upper part of the cabinet door is equipped with an opening and closing display that can display the state of the two-station isolating switch; the opening and closing position of the two-station isolating switch The gate display shows that it provides double protection for the safe operation of the system. There is a lightning arrester at the incoming line end of the isolating switch, which prevents the network voltage fluctuation of the front line from affecting the subsequent lines, and prevents the damage to the equipment and subsequent electrical circuits caused by overvoltage.

Further, the cabinet door 2 is provided with a first locking column 7 located in a horizontal position and a second locking column 8 located in a vertical position, the rotary baffle 6 has a bayonet 9, and the rotary baffle 6 can be positioned between two The limit of the locking column rotates between the horizontal position and the vertical position; when the rotary baffle 6 is in the horizontal position, the lower surface of the rotary baffle is limited on the first locking column 7, and when the rotary baffle 6 is in the vertical position In the straight position, the operation hole can be blocked and the bayonet is limited in the second locking column 8; when in use, unauthorized operators do not have the operation authority. When operation is required, the rotating baffle 6 is opened by a key to expose the operating hole, and then the operating handle is inserted, and the locking column can limit the rotating baffle 6, so that the operating hole is just exposed when it is opened, and the operating hole is blocked when it is closed.

Claims (3)

1. A DC two-station isolating switch operation locking device, including a switch cabinet body (1), a cabinet door (2) on the cabinet body, and a two-station isolating switch vertically fixed and installed in the middle of the frame of the cabinet body (1) (3), the insulation board (10) is installed on the periphery of the two-station isolating switch (3), the rear end of the operating spindle of the two-station isolating switch (3) is facing the operation hole on the cabinet door, and an operating handle (4) It can reach into the operation hole to operate the two-station isolating switch (3), and the feature is that: the cabinet door (2) is provided with an operation locking device located on one side of the operation hole, and the operation lock The device includes a locking operating end (5) controlled by a key and a rotating baffle (6) connected to the locking operating end, the rotating baffle (6) can rotate along the center of the locking operating end (5) and block the operating hole or leave the operating hole. 2. According to claim 1, the DC two-position isolating switch operating locking device is characterized in that: the cabinet door (2) is provided with a first locking column (7) in the horizontal position and a first locking column in the vertical position. The second locking column (8) on the top, the rotating baffle (6) has a bayonet (9), and the rotating baffle (6) can move between the horizontal position and the vertical position under the limit of the two locking columns. When the rotary baffle (6) is in the horizontal position, the lower surface of the rotary baffle is limited on the first locking column (7), and when the rotary baffle (6) is in the vertical position, it can block the operation hole and Make the bayonet limited in the second locking column (8). 3. The operating locking device for DC two-station isolating switch according to claim 1, characterized in that: the cabinet door (2) is provided with an observation window (9) for observing the opening and closing state of the two-station isolating switch.