摘要：【中文】用于直接空冷式发电机组切缸改造后的空冷岛防冻装置，以解决现有的防止空冷岛冻裂采用的通过新增管式凝汽器及其配套循环水泵的方式，增加厂用电率，且系统较复杂，占地面积大，隔离空冷岛运行使机组运行灵活性降低的问题。本发明包括减温阀组、减温水管、减温减压器、空冷岛蒸汽主管、防冻蒸汽主管、空冷岛和多根空冷岛蒸汽支分管；空冷岛上设有多根空冷岛蒸汽支分管，多根空冷岛蒸汽支分管分别与空冷岛蒸汽主管连通，空冷岛蒸汽主管与防冻蒸汽主管连通，防冻蒸汽主管上设有减温减压器，减温减压器的入水口与减温水管连通，减温水管上设有减温阀组。本发明可以实现直接空冷式发电机组调峰时汽轮机低压缸切除运行，并且对整个系统的影响较小。 【EN】A air cooling island freeze-proof device for direct air-cooled generating set cuts after jar is reformed transform to solve the current mode that prevents that air cooling island frost crack adopts through newly-increased tubular condenser and supporting circulating water pump, increase the station service power rate, and the system is more complicated, and area is big, keeps apart the problem that air cooling island operation used unit operation flexibility reduces. The invention comprises a temperature-reducing valve group, a temperature-reducing water pipe, a temperature-reducing pressure reducer, an air cooling island steam main pipe, an anti-freezing steam main pipe, an air cooling island and a plurality of air cooling island steam branch pipes; the air cooling island is provided with a plurality of air cooling island steam branch pipes, the air cooling island steam branch pipes are respectively communicated with an air cooling island steam main pipe, the air cooling island steam main pipe is communicated with an anti-freezing steam main pipe, the anti-freezing steam main pipe is provided with a temperature and pressure reducer, a water inlet of the temperature and pressure reducer is communicated with a temperature reduction water pipe, and the temperature reduction water pipe is provided with a temperature reduction valve group. The invention can realize the cutting off operation of the low pressure cylinder of the steam turbine when the direct air-cooled generator set is in peak regulation, and has little influence on the whole system.