Movable fit leakage controller for valve

Abstract

The invention discloses a movable fit leakage controller for a valve. The controller comprises a body part and a clamp part. The body part comprises a power end shaft and an upper end cover flange and a lower end cover flange which are arranged at the two ends of the power end shaft, bearings are embedded to the upper end cover flange and the lower end cover flange, the upper end cover flange, the lower end cover flange and a shell arranged between the upper end cover flange and the lower end cover flange form a sealing cavity, and the sealing cavity is internally provided with a dynamic/static sealing pair composed of a dynamic sealing ring and a static sealing ring; the clamp component comprises a clamp body, wherein a valve shaft mounting hole formed in the center of the clamp body, the valve shaft mounting hole is internally provided with a pair of semicircular-ring-shaped sealing slips, the two sides of the valve mounting hole are provided with transverse bolt holes which are symmetrical to each other and penetrate through the outer diameter of the semicircular-ring-shaped sealing slips, and the two transverse bolt holes are internally provided with adjusting bolts. The movable fit leakage controller has the advantages that a sealing mode of a traditional valve is changed, no filler or sealing device is needed, and the dynamic sealing effect of the valve can be guaranteed, so that various defects of a sealing mode in the prior art are overcome.

Description

technical field [0001] The invention relates to a leakage controller, more specifically, the invention relates to a dynamic fit leakage controller used for valves and capable of changing the sealing mode of traditional valves. Background technique [0002] At present, the valve body of the industrial valve and its built-in valve core need to realize the opening or closing of the valve through the twitching of the valve stem or the rotation of the valve shaft. For existing traditional valves, the sealing of the dynamic fit between the shaft holes is usually achieved by deforming and filling the dynamic fit space of the shaft holes by the external force of various fillers and glands. The biggest disadvantage of this method is that it increases the movement resistance of dynamic fit, so that: [0003] (1) If the packing is not compressed, the internal medium will leak from the gland; [0004] (2) If the packing is pressed too tightly, although the leakage is eliminated, the m...

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