The invention provides a crane lifting appliance testing device which comprises a main circuit and a control circuit. The main circuit comprises a main contact of a first contactor, a main contact ofa second contactor, a thermal relay and a first plug connector. The main contact of the first contactor and the main contact of the second contactor are connected in parallel and then are connected with the thermal relay in series; the first plug connector is connected with the thermal relay; the control circuit comprises a transformer, a normally-closed contact of the thermal relay, a stop switch, an opening switch, a closing switch, a first contactor, a second contactor and a second plug connector; thenormally-closed contact of the thermal relay is connected with the transformer; the normally open contact of the thermal relay is connected with the stop switch, the two ends of the normally open contact of the opening switch are connected with the stop switch and the first contactor respectively, the two ends of the normally open contact of the closing switch are connected with the stop switch and the second contactor respectively, and the second plug connector is connected with the transformer. The crane lifting appliance testing device facilitates the testing work of the lifting appliance.
本发明提供一种行车吊具测试装置,包括主电路和控制电路,主电路包括第一接触器的主触点、第二接触器的主触点、热继电器、及第一插接件,第一接触器的主触点和第二接触器的主触点并联后与热继电器串接,第一插接件与热继电器相连接,控制电路包括变压器、热继电器的动断触点、停止开关、打开开关、关闭开关、第一接触器、第二接触器及第二插接件,热继电器的动断触点与变压器相连接,且热继电器的动断触点与停止开关相连接,打开开关的常开触点的两端分别与停止开关和第一接触器相连接,关闭开关的常开触点的两端分别与停止开关和第二接触器相连接,第二插接件与变压器相连接。本行车吊具测试装置方便了吊具的测试工作。
Crane lifting appliance testing device
行车吊具测试装置
2020-05-22
Patent
Electronic Resource
Chinese
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