Multiple-sealing and split-flow decompression throttling stop valve
A throttling globe valve, valve body technology, applied in valve details, valve device, valve operation/release device, etc. performance and service life, to ensure long-term continuous use, eliminate high-speed erosion damage, and improve performance
Active Publication Date: 2012-07-11
ZHEJIANG SCI-TECH UNIV +1
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Problems solved by technology
[0003] There are some disadvantages in the sealing part of the existing stop valve, for example: due to the different fluid media used, it is mainly used to transport highly corrosive liquid media, which will cause certain erosion damage to the sealing part of the valve core during the transportation process, thus Affect the performance and service life of the valve; the structure of the valve core is mainly designed based on experience, resulting in uneven changes in the flow resistance characteristics of the valve, affecting the accuracy and range of use of the valve
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[0013] Such as figure 1 , 2 As shown, the multi-seal and shunt pressure reducing and throttling stop valve includes connecting flange 1, M16 hex nut 2, equal-length stud bolt 3, joint bolt 4, packing gland 5, M14 hex nut 6, stem nut 7 , hand wheel 8, M16 hex nut 9, flat washer 10, valve stem 11, packing gland 12, pin 13, slotted screw 14, packing 15, valve cover 16, disc nut 17, split ring 18, disc 19. Connecting bolts 20, valve body 21, shunt pressure reducing valve core 22 and shunt pressure reducing hole groove 23; connecting flanges 1 are provided on both sides of valve body 21, and the upper end of valve body 21 passes through M16 hex nut 2, equal-length double-headed The bolt 3 is connected with the bonnet 16, and the valve body 21 and the center of the bonnet 16 are provided with a valve stem 11, a valve disc nut 17, a split ring 18, a valve disc 19, a diverter pressure reducing valve core 22, and connecting bolts in sequence from top to bottom. 20. The valve stem 11 ...
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The invention discloses a multiple-sealing and split-flow decompression throttling stop valve which comprises a packing gland, a valve rod, a packing pressing sleeve, a packing, a valve cap, a valve clack, a valve body, a split-flow decompression valve core, split-flow decompression hole grooves and the like, wherein connecting flanges are arranged at both sides of the valve body; the upper end of the valve body is connected with the valve cap by a hexagonal nut and an equal-length stud bolt; the centers of the valve body and the valve cap are sequentially provided with the valve rod, a valveclack nut, a split ring, a valve clack, the split-flow decompression valve core and a connecting bolt from top to bottom; the valve rod is sequentially provided with a hexagonal nut, a plain washer and a hand wheel from top to bottom; a valve rod nut is arranged between the upper part of the valve cap and the valve rod; the hexagonal nut, the packing gland, the packing pressing sleeve, the packing, an eyelet bolt, a slotting bolt and a dowel are arranged sequentially between the lower part of the valve cap and the valve rod from top to bottom; and the split-flow decompression hole grooves arearranged at the periphery of the split-flow decompression valve core. The valve has the advantages of novelty, simple mechanism, easy control, good sealing performance, obvious split-flow decompression, long service life and the like and can meet the requirements of petroleum and chemical industries and the like.
Description
technical field [0001] The invention relates to valves, in particular to a multi-sealing and split flow decompression and throttling cut-off valve. Background technique [0002] In the petrochemical, petroleum and energy industries, globe valves are one of the most widely used fluid control components, and the components used in this special environment must have corresponding anti-destructive capabilities to avoid corrosion of the fluid on the sealing surface and instantaneous For impact damage, a "hard seal" sealing form is commonly used in engineering practice, that is, metal to metal contact to achieve a sealing effect. In practical applications, the sealing part of the valve is easily damaged due to the impact of liquid flow when the valve is opened or closed. Therefore, the flow mechanism inside the stop valve body and the reasonable structure of the sealing parts are studied to reduce the energy loss of the fluid in the flow channel of the stop valve and the erosion ...
Claims
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IPC IPC(8): F16K47/08F16K31/60
Inventor 崔宝玲宋治伟朱祖超张玉良夏成锐
Owner ZHEJIANG SCI-TECH UNIV