Load simulation mechanism of circuit breaker operating mechanism and load simulation test device

Abstract

The invention relates to a load simulation mechanism of a circuit breaker operating mechanism and a load simulation test device. The load simulation mechanism of a circuit breaker operating mechanism comprises a buffer cylinder and a piston which is arranged in the buffer cylinder. The piston is provided with an operating lever which is in transmission connection with the operating mechanism and can drive the piston to move. A damping channel which is communicated with cavities on both sides of the piston is arranged in the piston, the buffer cylinder or at least one place between the piston and the buffer cylinder. When the piston moves toward a rod cavity, gas in the rod cavity is compressed, and gas in the rod cavity applies force on the piston to realize buffering when the gas comes into a rod-free cavity through the damping channel. When the piston moves toward the rod-free cavity, the compressed gas in the rod-free cavity comes into the rod cavity through the damping channel to apply force on the piston. According to the circuit breaker simulation test, the gas is used as a load; actual circuit breaker conditions can be realistically and effectively simulated; and the credibility of a test result is high.

Description

technical field [0001] The invention relates to a load simulation mechanism of a circuit breaker operating mechanism and a load simulation test device using the load simulation mechanism. Background technique [0002] The opening and closing of the circuit breaker is mainly realized by the operating mechanism, so the characteristics of the circuit breaker are also mainly determined by the operating mechanism, such as opening and closing speed, opening time and closing time. Reliability. Before leaving the factory, each operating mechanism must be debugged with a load and a certain number of operation tests. Since the operating power of the operating mechanism of the circuit breaker, especially the high-voltage circuit breaker, is very large, it must be operated without a certain load. , the action of the operating mechanism is easy to damage itself, that is, it cannot be operated alone, and must be assembled with the support of the circuit breaker and the arc extinguishing c...

AI Technical Summary

Problems solved by technology

[0002] The opening and closing of the circuit breaker is mainly realized by the operating mechanism, so the characteristics of the circuit breaker are also mainly determined by the operating mechanism, such as opening and closing speed, opening time and closing time. Reliability. Before leaving the factory, each operating mechanism must be debugged with a load and a certain number of operating tests. Since the operating power of the operating mechanism of the circuit breaker, especially the high-voltage circuit breaker, is very large, it cannot be used without a certain load. , the action of the operating mechanism is easy to damage itself, that is, it cannot be operated alone, and must be assembled with the support of the circuit breaker and the arc extinguishing chamber before it can be operated or tested. large, and the cost of assembly is high. Currently, adjustable weights are used as loads for testing, such as figure 1 The simulated experimental device shown includes a buffer cylinder 1, a piston rod 2 and an adjustable counterweight 3 arranged on the piston rod 2. The operating mechanism is connected with the piston rod 2 and the operating rod, and the piston rod 2 drives the adjustable counterweight 3. The simulated opening and closing action is completed in the buffer cylinder 1, but because the contacts of the circuit breaker are actually in the high-voltage insulating gas, the resistance encountered by the contacts of the circuit breaker in actual work is all caused by the internal pressure of the circuit breaker. It is generated by the action of high-voltage insulating gas, so the simulation test using the adjustable weight as the load cannot truly and effectively simulate the actual working conditions of the circuit breaker, and the vibration amplitude is large and the noise is harsh during use.

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