The invention provides a dustproof overflow valve for a hydraulic system of a railway turnout electro-hydraulic switch machine. Filter screens are arranged in mounting grooves in the end surface of avalve body at an outer oil port of a first oil hole and the outer peripheral wall of the valve body at an outer oil port of a second oil hole; a pressure adjusting nut at the left end of the valve body is detachably and fixedly connected to the left end of a cavity in a sealing manner; the right end of a pressure adjusting screw rod in threaded connection with the pressure adjusting nut extends into the cavity; a locking nut adaptively connected to the pressure adjusting screw rod is butted against the left end part of the pressure adjusting nut; a spring, a steel ball base and a steel ball are arranged between the pressure adjusting screw rod and the first oil hole in sequence from left to right; the spring is acted on the steel ball base; the steel ball base pushes the steel ball to buttagainst an orifice of the first oil hole; and a dustproof device is mounted at the left end of the pressure adjusting screw rod. The dustproof overflow valve effectively prevents influence on the working performance of the overflow valve by dust in external environment and dust in oil liquid entering the valve body, guarantees convenient adjustment of the adjusting screw rod, improves tightness,and is low in machining cost, long in service life and higher in use value.

    提供一种铁路道岔电液转辙机液压系统用防尘型溢流阀,在一号油孔外油口处的阀体端面以及二号油孔外油口处的阀体外圆周壁上的安装槽内均设有滤网,阀体左端的调压螺母可拆式密封固连于空腔左端,与调压螺母螺纹连接的调压螺杆右端伸入空腔内,调压螺杆上适配连接的锁紧螺母抵于调压螺母左端部,调压螺杆和一号油孔之间从左向右依次设有弹簧、钢球座和钢球,弹簧作用于钢球座上由钢球座推动钢球抵紧于一号油孔的孔口,调压螺杆左端安装有防尘装置。本技术方案有效避免了外界环境中的杂尘以及油液中的杂尘进入阀体内部而对溢流阀工作性能的影响,确保调节螺杆调节方便的同时,提高了溢流阀的密封性,加工成本低,使用寿命长具有较高的使用价值。


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    Title :

    Dustproof overflow valve for hydraulic system of railway turnout electro-hydraulic switch machine


    Additional title:

    铁路道岔电液转辙机液压系统用防尘型溢流阀


    Contributors:
    ZHAO JIAN (author) / REN WEI (author) / DANG PENGLI (author)

    Publication date :

    2021-03-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B01D SEPARATION , Trennen / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / F16K VALVES , Ventile



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