What are the skills that only professionals in the industry are familiar with for power station valves? Although it appears to be rough and crude, there are actually many tricks involved.
1. Pressure assisted sealing
There is a self-locking system in the valve that tightens with increasing pressure. The greater the pressure, the more tightly the sealing ring is squeezed, similar to how a red wine cork is compressed by air pressure. When some high-pressure pipelines burst, the surrounding valves are actually sealed more tightly.
2. Diamond does not damage the valve stem
The surface of the valve stem has undergone nitriding treatment, and its hardness is comparable to that of a diamond nail clipper. Workers can scrape it with a wrench without leaving any marks. Teacher Fu from the steel plant said that this process can keep the valve stem in steam for ten years without rusting through.
3. Soft hard combination structure
The middle of the gate is secretly slotted to make spring plates, which can be adjusted to their own shape during thermal expansion and contraction. I have seen a power plant master using a blowtorch to bake valves for testing, and even after deformation, they can fit tightly together.
4. Lazy and arrogant during assembly and disassembly
The valve cover is designed to be top mounted, and replacing the sealing ring does not require dismantling the entire pipeline, which is as simple as replacing the phone film. During a repair, the worker squatted next to the valve with a bottle of Er Guo Tou and solved the leak in half an hour.
5. Be cautious of being foolish or not
The cobalt based alloy layer deposited on the sealing surface is three times harder than ordinary steel. Novice operators unscrew valves randomly, at most breaking the handle, but the sealing surface remains intact and undamaged.
The above designs have all been improved. In the past, valve leakage could make people burn their hair, but now even if there is a mistake in operation, it is only a sound.