Anti-impact outdoor fire hydrant

Abstract

The invention discloses a shock resistant outdoor fire hydrant which comprises a valve body base, an elevating screw and a sealing mechanism, wherein, the middle part of an inner hole of the valve body base is provided with a step-shaped inner ring which extends inwards; the sealing mechanism comprises a valve core arranged at the lower end of the elevating screw, a seal receptacle, a gland bush and a wear-resistant sleeve that is closely matched with the lower part of the inner ring of the valve body base; the valve core, the seal receptacle and the gland bush are connected into a whole, andthe valve core and the inner ring of the valve body base are in clearance fit; the seal receptacle and the gland bush are positioned under the inner ring of the valve body base of the fire hydrant; the diameters of the seal receptacle and the gland bush are larger than the internal diameter of the wear-resistant sleeve. Being arranged in such a structure, the shock resistant outdoor fire hydrant is sealed mainly by virtue of the self pressure sealing of aqueous medium, and the higher the hydraulic pressure along the water inlet direction is, the better the sealing performance is, thus greatlyreducing the damage at the contacting part, and prolonging the service life. Even if the overground part of the fire hydrant is crashed and broken, the sealing can be guaranteed by the self locking function, and good sealing can be kept for a long time.

Description

technical field [0001] The invention relates to fire fighting equipment, in particular to an anti-shock outdoor fire hydrant. Background technique [0002] Existing outdoor fire hydrants include a valve body seat, a lifting screw and a sealing mechanism. The middle part of the inner hole of the valve body seat has a stepped inner ring extending inward. Pad, wear-resistant sleeve, screw and sealing ring, the sealing ring is located above the inner ring of the valve body seat, the sealing sliding sleeve, sealing ring, and sealing ring pressing pad are connected as a whole by screws, the direction of water flow is from bottom to top, and the lifting screw Drive the sealing sliding sleeve, sealing ring, and sealing ring pressing pad to press down on the wear-resistant sleeve together for sealing. This sealing structure must overcome the upward thrust of the water flow to completely seal, and the sealing contact parts are easy to be damaged. Leakage or water leakage will cause t...

AI Technical Summary

Problems solved by technology

[0002] Existing outdoor fire hydrants include a valve body seat, a lifting screw and a sealing mechanism. The middle part of the inner hole of the valve body seat has a stepped inner ring extending inward. Pad, wear-resistant sleeve, screw and sealing ring, the sealing ring is located above the inner ring of the valve body seat, the sealing sliding sleeve, sealing ring, and sealing ring pressing pad are connected as a whole by screws, the direction of water flow is from bottom to top, and the lifting screw Drive the sealing sliding sleeve, sealing ring, and sealing ring pressing pad to press down on the wear-resistant sleeve together for sealing. This sealing structure must overcome the upward thrust of the water flow to completely seal, and the sealing contact parts are easy to be damaged. Leakage or water leakage, resulting in a shorter service life of outdoor fire hydrants

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