CN203056440U - Electromagnetic blocking device of contact baffle plate of central-positioned trolley power switch cabinet - Google Patents

Abstract

The utility model, which belongs to the security protection technical field of the central-positioned handcart power switch cabinet, brings forward an electromagnetic blocking device of a contact baffle plate of a central-positioned trolley power switch cabinet. The blocking device is composed of a baffle plate valve (7), a baffle plate connecting rod (3), a handcart, a handcart guide rail (8), a control circuit board (1), and stop electromagnets (5); and the control circuit board (1) controls the electrification and interruption of the power supply of the stop electromagnets (5). With utilization of the device, the operator can be prevented from touching the electrified part by mistake, thereby reducing the security risk during the maintenance process of the central-positioned cabinet. Therefore, the occurrence of the casualty accident in the maintenance work can be eliminated completely and thus intangible economic and social benefits can be produced.

Description

Electromagnetic locking device for contact baffle of center-mounted trolley power switch cabinet

technical field

The utility model relates to a safety protection device for a 10kV center-mounted handcart switch cabinet, in particular to a locking device for a contact baffle of a handcart-type switch cabinet. the

Background technique

The locking device of the contact baffle of the handcart switch cabinet is a safety device that reliably locks the contact baffle when the handcart parts in the switch cabinet are overhauled to prevent people from entering live parts by mistake. With the continuous expansion and strengthening of my country's power grid construction, the center-mounted handcart switchgear has been widely used due to its advantages of small structure, fast closing speed, and large breaking current. According to the GB3906 standard, when the handcart circuit breaker of the central switchgear is being maintained or tested, the valve should be independently locked in the closed position. In the actual application of the center-mounted switchgear, there are several reasons that may cause the baffle to be opened by mistake: the opening of the baffle is jammed, resulting in the exposure of the live parts of the contacts in the cabinet; The scope of work; various uncertain factors such as on-site operators accidentally touching the baffle linkage mechanism. The existing locking devices for the baffles of switchgears all have deficiencies, such as complex structures, or unreliable locking, which have certain potential safety hazards and threaten the personal safety of operators. the

Utility model content

In order to overcome the above-mentioned defects in the prior art, the utility model provides a locking mechanism for a middle-mounted switch cabinet contact baffle, which has a simple structure and is safe and reliable. the

An electromagnetic locking device for the contact baffle of a middle-mounted trolley power switch cabinet, including a baffle valve, a baffle connecting rod, a handcart, a guide rail of the handcart, and a control circuit board; the installation of the baffle valve, the baffle connecting rod, and the control circuit board On the side wall of the switch cabinet, the handcart guide rail is fixed on the bottom surface of the switch cabinet; the handcart moves in the handcart guide rail, and the baffle link action arm is installed on the upper and lower sides of the baffle link; the baffle valve is controlled by the baffle The connecting rod drives the opening and closing, and it is characterized in that: the locking device also includes a stop electromagnet, the stop electromagnet is installed on the side of the baffle connecting rod, and is opposite to the action arm of the baffle connecting rod; the stop electromagnet is connected with the control The circuit board is connected with wires, and the control circuit board controls the power on and off of the stop electromagnet. the

The locking device for the contact baffle of the middle-mounted trolley power switch cabinet effectively eliminates the safety hazards caused by manually installing the program lock on the contact baffle, ensuring the safety of operation and maintenance work; further improving The degree of automation and intelligence of the contact baffle locking mechanism is improved, and the power loss caused by the operation of one line of equipment, the power failure of all busbar equipment, and the expansion of the scope of equipment maintenance are avoided. the

Description of drawings

Fig. 1 is the structural diagram of this device embodiment;

Fig. 2 is the control circuit board schematic diagram of this device embodiment;

Fig. 3 is a schematic diagram of the device and the switchgear as a whole. the

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, the switchgear 6 is equipped with a busbar room, a static contact device, a moving contact device, a baffle valve 7, a baffle connecting rod 3, a stop electromagnet 5, and a handcart Rail 8 and control circuit board. The static contact is installed in the busbar room, facing the moving contact separated by the baffle valve 7. The moving contact is installed on the handcart switch of the handcart. The handcart moves freely in the handcart guide rail 8, and the baffle The valve 7 is driven by the baffle connecting rod 3 to open and close. The stop electromagnet 5 is installed on the baffle connecting rod 3 sides, is facing with the baffle connecting rod action arm 4, and is reliably fixed on the inner wall of the switch cabinet 6. The stop electromagnet 5 is connected with the control circuit board 1 with a wire 2 to form an overall system. the

Contain microcomputer control circuit in the control circuit board 1, and it comprises power supply control circuit, power electronic circuit, distance measuring sub-circuit, serial port debugging circuit and display circuit. the

When the handcart switch needs to be tested and overhauled, when the handcart is pushed from the working position to the experimental position, the control circuit board 1 judges the pull-out position of the handcart in the cabinet through the distance measuring sub-circuit to control whether the stop electromagnet 5 is Power-on work, after the stop electromagnet 5 is energized, the stop electromagnet 5 will tightly absorb the baffle link action arm 4, so that the baffle link action arm 4 cannot move, so that the baffle valve 7 is forcibly locked, In order to avoid touching live parts by mistake. When the handcart is advancing from the experimental position to the working position, the control circuit board 1 judges the position of the handcart in the cabinet through the distance measuring sub-circuit, and controls whether the stop electromagnet 5 is powered off, and the stop electromagnet 5 is turned off. The electricity stops working, and the stop electromagnet 5 releases the baffle plate link action arm 4, and the baffle plate link 3 can freely open the baffle plate valve 7, which does not affect the pushing of the handcart. the

Claims (2)

1. An electromagnetic locking device for the contact baffle of a mid-mounted trolley power switch cabinet, including a baffle valve (7), a baffle connecting rod (3), a handcart, a handcart guide rail (8) and a control circuit board (1) ;The baffle valve (7), the baffle connecting rod (3) and the control circuit board (1) are installed on the side wall of the switch cabinet, and the handcart guide rail (8) is fixed on the bottom surface of the switch cabinet; The guide rail (8) moves inside, and the upper and lower sides of the baffle link (3) are equipped with baffle link action arms (4); the baffle valve (7) is opened and closed by the baffle link (3). That is: the locking device also includes a stop electromagnet (5), which is installed on the side of the baffle link (3) and is opposite to the baffle link action arm (4); the stop solenoid The iron (5) is connected with the control circuit board (1) with a wire (2), and the control circuit board (1) controls the power on and off of the stop electromagnet (5). the 2. The electromagnetic locking device for the contact baffle of the middle-mounted trolley power switchgear as claimed in claim 1, wherein the handcart switch on the handcart is equipped with a moving contact, and the busbar room of the switchgear is equipped with a static contact . the

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