The invention provides a sealed 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 face of a valve body at an outer oil port of a first oil hole and the outer circumferential wall of the valve body at an outer oil port of a second oil hole; a pressure adjusting screw is adjustably mountedat the upper end of the valve body in a sealed manner; a spring, a steel ball seat and a steel ball are sequentially arranged between the pressure adjusting screw and the first oil hole from top to bottom; the spring acts on the steel ball seat, the steel ball is pushed by the steel ball seat to be abutted to an inner hole port of the first oil hole; and a dustproof device for preventing dust from entering the valve is mounted at the upper end of the pressure adjusting screw. The influence of the dust in an external environment and oil entering the valve body on the working performance of theoverflow valve is effectively avoided, the tightness of the overflow valve is improved while convenience in adjustment of the adjusting screw is ensured, machining cost is low, the service life is long, the use requirements of the hydraulic system of the railway turnout electro-hydraulic switch machine for the overflow valve are met, and the sealed dustproof overflow valve has high use values.

    提供一种铁路道岔电液转辙机液压系统用密封防尘型溢流阀,在一号油孔外油口处的阀体端面内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,阀体上端可调式密封安装有调压螺杆,调压螺杆和一号油孔之间从上向下依次设有弹簧、钢球座和钢球,弹簧作用于钢球座上并由钢球座推动钢球抵紧于一号油孔的内孔口处,所述调压螺杆上端安装有防止杂尘进入的防尘装置。本发明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,满足铁路道岔电液转辙机液压系统对溢流阀的使用要求,具有较高的使用价值。


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    Title :

    Sealed 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密封防尘型溢流阀


    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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