CN201656316U - Simple mechanical locking device of handcart type circuit breaker of switchgear cabinet - Google Patents

Abstract

The utility model relates to a simple mechanical locking device of a handcart type circuit breaker of a switchgear cabinet, which comprises two or more mechanical program locks sharing one key, a fixing support is mounted on the handcart type circuit breaker needed to be locked in the switchgear cabinet, the mechanical program locks are mounted on the fixed support, a lock hole is formed on a side seal plate of the cabinet body of the switchgear cabinet, when the lock hole and the handcart type circuit breaker are in the locking positions, lock tongues of the mechanical program locks thereon correspond to each other. The simple mechanical locking device can realize that only one handcart type circuit breaker can be electrified by one key, thereby effectively avoiding short circuit phenomenon caused by two or more lines of power supplies supplying power simultaneously, realizing reliable locking and ensuring the safety of power consumption. The simple mechanical locking device has the advantages of simple structure, simple and convenient installation and use, strong universality, very easy detachment and maintenance, and low cost, and is particularly applicable to field transformation projects of high-voltage switch cabinets.

Description

Simple mechanical locking device for handcart circuit breaker in switchgear cabinet

technical field

The utility model relates to a safety device on power transmission and transformation equipment, in particular to a simple mechanical locking device for a handcart-type circuit breaker of a switchgear cabinet with convenient on-site modification, low cost and reliable locking.

Background technique

For the safety of electricity use, two or more 10kV handcart circuit breakers in the high-voltage switchgear need to be locked, that is, when one circuit breaker is required to be powered on, the other circuit breakers must be powered off to avoid short circuits caused by simultaneous power supply . At present, to lock the 10kV handcart circuit breaker of the high-voltage switchgear, either a more complicated mechanism is installed on the chassis of the high-voltage switchgear, or an electrical lock is adopted. The former needs to be customized by the manufacturer and cannot be used at the site where the high-voltage switchgear is used. Flexible transformation is carried out, and the reliability of the latter electrical locking is far lower than that of mechanical locking, so generally two or more power supply incoming line circuit breakers require the use of mechanical anti-misoperation locking methods. However, it often happens that on-site modification is required. At this time, if mechanical locking is to be realized, all chassis vehicles must be replaced, and customization must be made. There are big problems in terms of supply cycle and modification cost. If electrical locking is used, The reliability of locking can not meet the requirements.

Contents of the invention

The utility model mainly solves the technical problems that the reliability of the electrical lock is not high enough, and the original mechanical lock structure is complex, it is not convenient for on-site modification, needs to be customized, the cost is high and time-consuming; it provides a simple structure, reliable lock, and easy to dismantle. Simple mechanical locking device for handcart circuit breakers of switchgear cabinets, which are easy to install and maintain, lower cost, save time, and are especially suitable for on-site renovation projects.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: the utility model includes two or more mechanical program locks sharing a key, and the mechanical program locks are installed in the switchgear cabinet and need to be locked. On the handcart-type circuit breaker, the side sealing plate of the switchgear cabinet is provided with a lock hole, and the lock hole is in phase with the lock bolt of the mechanical program lock on the handcart-type circuit breaker when it is in the locked position. correspond. Except that there is a lock hole in this position of the side sealing plate of the cabinet body, the lock tongue can pass through, and the other positions can block the lock tongue. That is to say, the mechanical program lock can only be locked in the keyhole position, and the mechanical program lock cannot be locked in other positions, but can only be in the open state, and the key on the mechanical program lock cannot be removed when it is in the open state , the key can only be removed when the mechanical program lock is locked. When a key opens the mechanical program lock on a handcart circuit breaker, the key must be on the mechanical program lock, and other handcart circuit breakers are in the locked position at this time. If you want to open other handcart circuit breakers, you must first move the above handcart circuit breaker to the locked position, lock the mechanical program lock, and then remove the key, and then open another handcart circuit breaker. Of course, the lock hole can also be opened in other corresponding locking positions (such as the isolation position, test position or working position of the circuit breaker). Only one handcart circuit breaker can be energized by one key, effectively avoiding the short circuit phenomenon caused by simultaneous power supply of two power sources, and the locking is reliable to ensure the safety of electricity use. Moreover, this locking method is simple in structure, easy to disassemble and maintain, low in cost, and time-saving, and is especially suitable for projects that need to be remodeled at the installation site of high-voltage switchgear.

Preferably, a fixing bracket is installed on the handcart circuit breaker, and the mechanical program lock is installed on the fixing bracket. Make sure that the mechanical program lock is easy and secure to install.

Preferably, the fixing bracket is a frame with one side open, the left and right sides of the frame are parallel to the side sealing plate of the cabinet body, and the mechanical program lock is installed on one of the sides close to the side sealing plate of the cabinet body. side.

The utility model has the beneficial effects of simple structure, simple and convenient installation and use, reliable locking, strong versatility, easy disassembly and maintenance, low cost and low cost, and is especially suitable for on-site transformation projects of high-voltage switch cabinets.

Description of drawings

Figure 1 is a schematic structural view of the utility model in an open state.

Fig. 2 is a schematic structural view of the utility model in a locked state.

In the figure 1. Mechanical program lock, 2. Key, 3. Handcart circuit breaker, 4. Cabinet side sealing plate, 5. Lock hole, 6. Lock tongue, 7. Fixed bracket.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment 1: The simple mechanical locking device of the handcart circuit breaker of the switchgear cabinet in this embodiment depends on the number of handcart circuit breakers to be locked and the power supply mode, for example, between two incoming handcart circuit breakers Locking is required, that is, when one is energized, the other must be de-energized, then two mechanical program locks that share a key are selected for use. As shown in Figure 1, two mechanical program locks 1 are installed on the two 10KV handcart circuit breakers 3 that need to be locked in the switchgear cabinet, and are installed on the two handcart circuit breakers 3 that need to be locked in the switchgear cabinet. There is a fixed bracket 7, the fixed bracket 7 is a frame with one side open, the left and right sides of the frame are parallel to the cabinet side sealing plate 4 of the switchgear cabinet, and the mechanical program lock 1 is installed on the side on the left side of the frame . There is a lock hole 5 on the side sealing plate 4 of the switchgear cabinet, and the lock hole 5 corresponds to the dead bolt 6 of the mechanical program lock 1 on the two handcart circuit breakers 3 when they are in the locked position.

Specific operation: 1. Break the handcart circuit breaker that needs to be powered off and move it to the locked position, as shown in Figure 2, turn the key on the mechanical program lock to make the lock tongue penetrate the lock hole, and take out the key, the circuit breaker If the switch is locked in this position, it cannot be closed and cannot supply power. 2. Insert the key into the handcart-type circuit breaker that needs power supply, open the mechanical program lock, then move the circuit breaker to the working position, and close the switch to supply power, as shown in Figure 1. At this time, the key on it cannot be removed. down. Therefore, the other mechanical program lock can only be opened after one mechanical program lock is locked, that is, only one handcart circuit breaker can be switched off before the other handcart circuit breaker can be closed to avoid two handcart circuit breakers. The device is short-circuited due to false locking and power supply at the same time, ensuring the safety of electricity use.

The utility model has the advantages of simple structure, convenient installation and use, reliable locking, strong versatility, easy disassembly and maintenance, low cost and low cost, and is especially suitable for on-site transformation projects of high-voltage switch cabinets.

Claims (3)

1. simple and easy mechanical locking device of switchgear cabinet handcart type breaker, it is characterized in that comprising two or many Mechanically programm of a shared key (2) lock (1), described Mechanically programm's lock (1) is installed on the handcart type breaker (3) that needs locking in the switchgear cabinet, the cabinet side seal board (4) of described switchgear cabinet is provided with lockhole (5), and the dead bolt (6) of described lockhole (5) and handcart type breaker (3) the Mechanically programm's lock (1) on it when being in locked position of coupler is corresponding.

2. the simple and easy mechanical locking device of switchgear cabinet handcart type breaker according to claim 1, it is characterized in that being equipped with on the described handcart type breaker (3) fixed support (7), described Mechanically programm's lock (1) is installed on the described fixed support (7).

3. the simple and easy mechanical locking device of switchgear cabinet handcart type breaker according to claim 2, it is characterized in that described fixed support (7) is the framework of openings at one side, left and right two limits of framework are parallel with described cabinet side seal board (4), and described Mechanically programm lock (1) is installed in wherein one near on the limit of cabinet side seal board (4).

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