A valve stem sealing device
A sealing device and valve stem technology, which is applied to valve devices, shaft seals, cocks including cut-off devices, etc., can solve the problems of short use time and frequent replacement of seals, and achieve reliable sealing, convenient use and adjustable sealing degree. Effect
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[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0029] Refer below Figure 1 to Figure 5 The present invention is described further, as figure 1 A valve stem sealing device 7 shown is arranged between the valve body 1 and the upper valve stem 3 .
[0030] Such as figure 2 , image 3 with Figure 4 As shown, the valve stem sealing device 7 includes a cylindrical sealing ring 71, several support sleeves 72, several elastic supports 73 and screw caps 76, and an annular receiving groove 715 is provided on the cylindrical sealing ring 71 to hold the The side wall of the cylindrical sealing ring 71 is divided into an inner cylindrical ring 711 and an outer cylindrical ring 713; several supporting sleeves 72 are sequentially sleeved in the annular receiving groove 715 along the axis of the cylindri...
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