3-2 voting and 4-2 hydraulic shielding steam turbine protection device
A technology of four out of two, steam turbine, applied in the direction of safety devices, mechanical equipment, engine components, etc., can solve the problems that the signal link simulation test cannot be realized, and achieve the effect of ensuring reliability
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Embodiment 1
[0025] Such as figure 2 As shown in the figure, a steam turbine protection device with two-out-of-three voting and two-out-of-four hydraulic interruption includes sensors for measuring steam turbine parameters, an input card, a redundant controller 4, an execution channel, and an interruption actuator 5, and the sensor and input card Connection, the input card is connected with the redundant controller 4, the redundant controller 4 is connected with the execution channel, the execution channel is connected in the power supply circuit of the interrupting actuator 5 through the normally open contacts of the relay, and it is also used for simulating the failure of the measurement sensor The analog circuit includes a logic output card DO´ and a fault simulation relay, the input terminal of the logic output card DO´ is connected to the redundant controller, and the output terminal of the logic output card DO´ passes through the fault simulation relay Normally-closed contacts are c...
Embodiment 2
[0030] Such as image 3As shown in the figure, a steam turbine protection device with two-out-of-three voting and two-out-of-four hydraulic interruption includes sensors for measuring steam turbine parameters, an input card, a redundant controller 4, an execution channel, and an interruption actuator 5, and the sensor and input card Connection, the input card is connected with the redundant controller 4, the redundant controller 4 is connected with the execution channel, the execution channel is connected in the power supply circuit of the interrupting actuator 5 through the normally open contacts of the relay, and it is also used for simulating the failure of the measurement sensor The analog circuit includes a logic output card DO´ and a fault simulation relay, the input terminal of the logic output card DO´ is connected to the redundant controller, and the output terminal of the logic output card DO´ passes through the fault simulation relay Normally-closed contacts are con...
example 2
[0032] The speed sensor sends the signal to the three-channel speed analog input card through the cable, and the speed analog card sends the command through the comparator through the output relay K11, K12, K13, and a pair of normally open contacts of the relay K11, K12, K13 are connected back to the controller The other eight normally open contacts of K11, K12, and K13 form a two-out-of-three voting expansion circuit, which is connected in series to the four power supply circuits of the actuator, and finally to the actuator. (difference between example 1 and example 2)
[0033] The non-speed sensor sends the signal to the three-channel logic input card through the cable, and the logic input card sends the signal to the redundant controller through the data bus, and the redundant controller sends the execution command to the To the four-column execution channel to block the action of the actuator, the logic output card, the logic output card sends the command to the output rel...
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