An electromagnetic pressing type automatic throwing and withdrawing pressure plate

Abstract

The invention discloses an electromagnetic pressing type automatic throwing and returning pressing plate, which includes a pressing plate mechanism, a pressing action mechanism, and an electromagnetic pressing mechanism; the pressing plate mechanism includes a matching fixed plate and a moving plate, and at least a pair of contact electrodes are arranged on the contact surface in a closed state ;The pressing action mechanism includes a sliding claw and a push rod arranged in the casing, the end of the sliding claw is connected to the moving plate, and the end of the push rod is connected to an electromagnetic pressing mechanism; the sliding claw and the pushing rod are linked through an alternate switch lock structure; the electromagnetic pressing mechanism Drive the push rod to expand and contract, and the linkage plate rotates and expands and contracts with the sliding claw to control the opening and closing state of the contact electrodes. Its structure is simple, its production and maintenance costs are low, it is easy to operate, and its stability is strong. It does not require additional human intervention during implementation, which reduces operational risks, improves work efficiency, and reduces labor costs; it effectively improves system security and has Strong practicality and wide applicability.

Description

technical field [0001] The invention relates to a throwing and retracting pressure plate, in particular to an electromagnetic pressing type automatic throwing and withdrawing pressure plate, which belongs to the technical field of electric power. Background technique [0002] The relay protection system is an indispensable and important part of the power system, and the reliability and stability of the relay protection system is directly related to the safe operation of the power system. The power pressure plate is the bridge and link between the relay protection device and the external wiring, and it is also a means of human-computer interaction. At the same time, the pressure plate is an obvious disconnection point in the protection system. The operator can intuitively observe whether the trip circuit of the relay protection device is connected with the trip coil of the circuit breaker, which provides great convenience for maintenance and operation. [0003] The operation...

AI Technical Summary

Problems solved by technology

[0004] However, for substations using outdoor cabinets, the environment where the relay protection devices are located poses a greater threat to the personal safety of operators: on the one hand, outdoor cabinets are usually installed next to high-voltage devices, and the environment itself has risks; on the other hand, outdoor cabinets It is charged during operation, especially in bad weather conditions such as rainy days, the operation of opening the cabinet door will increase the chance of danger for the operator

[0005] At this stage, some researchers have designed an electric platen that can realize automatic switching on and off. However, the structure of the above-mentioned electric platen is relatively complicated, and all of them are driven by motors, requiring an additional motor controller.

A relay protection device usually has multiple pressure plates, and configuring a motor and driver for each pressure plate seriously increases the cost, and the control system is more complicated and less stable

At the same time, the above-mentioned electric pressure plate converts the rotation of the motor into the translational motion of the pressure plate through the mechanical mechanism. When the motor system fails, due to the limitation of the mechanical structure, the electric pressure plate cannot be manually switched on and off.

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