DEH system emergency trip control mechanism
A technology for emergency interruption and control mechanism, applied in mechanical equipment, engine components, machines/engines, etc., it can solve the problems of steam turbine overspeed and enterprise loss, and achieve the effect of stable operation, high safety and difficult operation.
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Embodiment 1
[0030] Such as figure 1 Shown is the first preferred embodiment of the present invention.
[0031] Such as figure 1 As shown, the DEH system emergency interruption control mechanism in this embodiment is used to make the regulating valve oil motor 92 act in response to the conduction of the overspeed protection control oil circuit 14 and the non-pressure return oil circuit 12 to close the regulating valve 102 and enable The main valve oil motor 91 acts to close the main valve 101 in response to the conduction of the emergency shutdown oil circuit 13 and the non-pressure oil return oil circuit 12 .
[0032] Such as figure 1 As shown, there are two one-way valves 4 between the emergency shutdown oil circuit 13 and the overspeed protection control oil circuit 14, and the two one-way valves 4 are arranged in parallel, and the inlets of the two one-way valves 4 are connected with the overspeed protection control The oil circuit 14 is connected, and the outlets of the two check v...
Embodiment 2
[0045] The difference between this embodiment and Embodiment 1 is that the oil outlet of the hydraulic reversing valve 2 can only communicate with the emergency shutdown oil circuit 13, so that the reversing of the hydraulic reversing valve 2 can only conduct the emergency shutdown oil. The oil circuit 13 is connected to the non-pressure oil return circuit 12, while the overspeed protection control oil circuit 14 is critically cut off by automatic shutdown.
Embodiment 3
[0047] The difference between this embodiment and Embodiment 1 is that the oil outlet of the hydraulic reversing valve 2 can only communicate with the overspeed protection control oil circuit 14, so that the reversing of the hydraulic reversing valve 2 can only realize the overspeed protection control oil circuit 14 and the overspeed protection control oil circuit 14. The conduction of the non-pressure oil return oil circuit 12, so that the emergency interruption control mechanism of the DEH system can only control the closing of the regulating valve.
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