进口高压旁路调节阀(德国进口调节阀***)OLES
【进口高压旁路调节阀】详细说明：
高压旁路调节阀是一种结构特殊的高压差调节阀，该调节阀兼有启动调节阀，减压旁路阀和安全阀的作用。可实现快速自动跟踪超压保护，省去锅炉安全阀。该阀能在6秒内实现快速启动，电动执行机构的控制系统通过调节蒸汽压力以适应机组不同工况的参数启停和运行；机组甩负荷后锅炉可以不立即熄火，等事故排除后，几分钟内即可重新投入运行，既减少锅炉的启停次数，又减少了对汽轮机的热冲击。减温水的调节与高压旁路快速联动，能大幅降温***，减少电厂庞大的减温减压系统及设备，所以该阀是大容量单元再热机组旁路系统的重要调节阀之一。
High-pressure bypass control valve is a special high-pressure differential control valve, which has the functi*** of starting control valve, relief bypass valve and safety valve. It can realize fast automatic tracking overpressure protection and s***e boiler safety valve. The valve can start quickly in 6 seconds, and the control system of the electric actuator can adjust the steam pressure to adapt to the start-up and shut-down of the parameters under different working conditi*** of the unit; the boiler can not immediately shut down after the load rejection of the unit, and can be put into operation again in a few minutes after the accident has been eliminated, thus reducing the number of start-up and shut-down of the boiler as well as reducing the number of start-up and shut-down. Less thermal shock on steam turbines. The rapid linkage between the regulation of temperature-reducing water and high-pressure bypass can greatly reduce temperature and pressure, and reduce the huge system and equipment of temperature-reducing and pressure-reducing in power plants. Therefore, the valve is one of the important regulating valves in the bypass system of large-capacity unit reheater units.
【进口高压旁路调节阀】结构说明：
高压旁路调节阀工作条件很差，一般都在节流状态下运行，温差应力很大，节流的汽蚀现象严重，阀门极易损坏。由此可见，设计制造出性能优越、耐汽蚀、强度高、噪声低、结构简单可靠的高压旁路阀非常重要。针对上述工况要求，对高压旁路调节阀结构设计和材料选择等方面进行了优化，设计出新型的高压旁路阀。其特点是节流元件采用了多孔套筒结构，与阀芯构成节流元件；在阀芯后布置***孔板；蒸汽出口设计成缩放口；减温水由外部引入阀体后，通过多孔管喷出，与高温蒸汽直接混合来降低蒸汽温度；采用这些结构后，使运行中汽蚀量大为减轻，延长了高压旁路阀的使用寿命；阀座设计成可拆卸结构，拆装方便，便于检修；阀座密封面采用斜面结构，设计合理，使调整门密封面的密封达到很好效果。
【进口高压旁路调节阀】特点：
蒸汽经过4级节流，噪音低。蒸汽先通过套筒和阀座，压力降低了一部分。节流罩下端的喷嘴向上喷出高速冷却水，冷却水在节流罩中心被高压蒸汽雾化和混合的过程中，进行充分的热交换，从而使高温蒸汽再节流罩内完成降温过程，然后通过节流罩，再通过两个节流孔板，把蒸汽压力降低到额定要求，由于蒸汽的减压减温都在同一阀体内完成，故系统不另设专门的减温器。
b.高压旁路控制系统能使这台阀在6秒内快速启动，正常工况采用慢速调节。
c.上阀盖采用自密封结构，可防止蒸汽外溢。