Double-pressing-screw refrigerating valve packing material sealing structure
A packing sealing and screw pressing technology, which is applied in shaft sealing, valve details, valve devices, etc., can solve the problems of difficult packing and tight sealing, and achieve low maintenance cost, reliable sealing, and avoiding safety accidents and environmental pollution. Effect
Inactive Publication Date: 2018-08-10
ZHONGNAN JIAOZUO AMMONIA VALVE
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Problems solved by technology
[0003] In view of this, the present invention provides a double-pressure screw refrigeration valve packing sealing structure, which can avoid the problems in the prior art and solve the problems of poor sealing and difficult removal of packing
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Embodiment Construction
[0018] like figure 1 As shown, the packing sealing structure of the refrigeration valve in the prior art includes a valve stem and a valve cover 102 , the valve stem is arranged inside the valve cover 102 , and a hand wheel 101 is provided at one end of the valve stem. The pressure screw 103 is sleeved on the valve stem and is threadedly connected with the valve cover 102 , and the valve stem below the pressure screw 103 is sleeved with a packing 104 . When the filler 104 leaks, the medium will leak from the upper part of the valve. At this time, the valve must be shut down to replace the filler 104, which affects normal production and life.
[0019] like figure 2 As shown, the present invention provides a double-pressure screw refrigeration valve packing sealing structure, including a valve stem and a valve cover 202 , the valve stem is arranged in the valve cover 202 , and a hand wheel 201 is provided at one end of the valve stem. A first pressure screw 203 and a second p...
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The invention provides a double-pressing-screw refrigerating valve packing material sealing structure. The double-pressing-screw refrigerating valve packing material sealing structure comprises a valve rod and a valve deck, the valve rod is arranged in the valve deck, and the valve rod is sleeved with a first pressing screw and a second pressing screw. A first pressing screw outer thread is arranged on the first pressing screw, a second pressing screw inner thread matched with the first pressing screw outer thread is arranged on the second pressing screw, and a first packing material is arranged in a cavity between the bottom of the first pressing screw and the second pressing screw. A second pressing screw outer thread is arranged on the second pressing screw, a valve deck inner thread matched with the second pressing screw outer thread is arranged on the valve deck, and a second packing material is arranged in a cavity between the bottom of the second pressing screw and the valve deck. According to the double-pressing-screw refrigerating valve packing material sealing structure, the problems in the prior art can be avoided, and the problems that sealing is not tight and the packing materials are hard to take out are solved.
Description
technical field [0001] The invention relates to the field of valves, in particular to a packing sealing structure for double-pressure screw refrigeration valves. Background technique [0002] Ammonia valve is a commonly used component in refrigeration equipment. Its function is to control or block the flow of refrigerant by closing and opening the ammonia valve during the use of refrigerant in the refrigeration system. The refrigerant enters the output after passing through the ammonia valve. The pipeline completes the normal delivery or circulation of refrigerant; when it is necessary to block the delivery or circulation, turn the handle so that the valve disc and the outlet are closed, and the refrigerant will be blocked by the valve disc and will not be output from the outlet ; and when the valve blocks the refrigerant, no leakage is allowed; in the production process of the ammonia valve, because the valve body is often working under the high pressure of the refrigerant,...
Claims
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IPC IPC(8): F16K41/02
CPCF16K41/02
Inventor 王广甫田喜战温国旭卢德成闫拓王瑞军
Owner ZHONGNAN JIAOZUO AMMONIA VALVE