The hydraulic valve is mainly applied to hydropower medium containing sediment water temperature -28~80 hydropower station water pipe as the opening and closing device can only be fully open and fully closed, can not be adjusted, with the advantages of small flow resistance, and closed flexible, high safety and convenient operation, etc..
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.
采用雙密封環(huán)的活塞止水環(huán)結(jié)構(gòu),分上游檢修密封和下游工作密封。在環(huán)形閥芯的上下游密封位置均設(shè)置有密封環(huán),通過液壓系統(tǒng)推動活塞止環(huán)與其壓緊,實(shí)現(xiàn)密封。正常關(guān)閉球閥時(shí),下游工作密封關(guān)閉,順利止水,而在檢修或更換下游工作密封時(shí),上游檢修密封關(guān)閉,并由機(jī)械鎖定裝置鎖定。
操作機(jī)構(gòu)為液壓操作機(jī)構(gòu)(直缸接力器),直缸接力器為活塞--撥叉機(jī)構(gòu),設(shè)置有手動鎖定裝置、主閥位置信號指示裝置以及手動鎖錠投入或撥出信號指示裝置。手動鎖定裝置能抵擋接力器的操作壓力,避免閥門誤動作。
在球閥的上、下游密封環(huán)上,分別設(shè)置了位置行程開關(guān),通過電路接至中控室后,能夠準(zhǔn)確地了解密封環(huán)所處狀態(tài),以便能夠準(zhǔn)確地操作接力器開關(guān)閥門。
液動球閥(主閥)上游通過閥前短管與進(jìn)水管道焊接,下游通過伸縮節(jié)與水輪機(jī)蝸殼連接,以便于安裝和檢修液動球閥(主閥),伸縮節(jié)調(diào)整。
液動球閥(主閥)設(shè)置有旁通生產(chǎn)管道,其目的在于開啟主閥前使閥門上下游端的壓力平衡,減小主閥啟閉力矩。旁通閥為--液動球閥,在液動球閥前設(shè)置-手動閥門,用于檢修旁通液動球閥。
在伸縮節(jié)頂部設(shè)置有DN80的楔式閘閥,在壓力鋼管向下游水輪機(jī)充水時(shí),該閥門完全打開,將水面的空氣排除。在球閥底部和伸縮節(jié)度部均設(shè)置有DN80mm,PN4.0MPa的手動閘閥,用于在檢修水輪機(jī)等時(shí)充分排除閥門體腔內(nèi)的污物和蝸殼內(nèi)和積水。
在接力器的開關(guān)兩個(gè)進(jìn)油口處分別設(shè)置了兩具節(jié)流閥,使閥門的開啟和關(guān)閉時(shí)間可以根據(jù)顧客要求進(jìn)行調(diào)節(jié)。
1, technical manufacture according to the provisions of GB12237
2, inspection and testing according to the provisions of JB/T9092
3, the flange size according to the provisions of JB79
4, the structure length according to the provisions of GB12221