The invention provides a hydraulic control one-way valve for a railway turnout electro-hydraulic switch machine. An annular groove of a conical structure is formed in the outer circumferential wall ofthe lower end of a valve element, the groove walls of the upper end and the lower end of the annular groove are horn-shaped, and the lower end face of a valve body and the side wall of the valve bodyare sequentially provided with a No.1 oil hole, a No.2 oil hole and a No.3 oil hole from bottom to top; the valve element with the lower end located in the No.1 oil hole is installed in the cavity; aspring with the lower end abutting against a first step-shaped face on the inner wall of the cavity is arranged in the cavity; the spring is installed on the valve element in a sleeved mode; the upper end of the spring abuts against a spring gasket, and the inner step face of the spring gasket abuts against a steel wire check ring; and the conical ring surface at the lower end of the annular groove is in contact with the communicating part of the top wall of the No.1 oil hole and the cavity through the spring. According to the technical scheme, by optimizing a sealing structure of the one-wayvalve, good sealing conditions are provided for on-off of the one-way valve, the working reliability of the one-way valve is guaranteed, an effective sealing structure is provided for the No.1 oil hole and the lower end of the valve element, the designed conical ring face has the sealing compensation function, and the sealing effect is greatly improved.
提供一种铁路道岔电液转辙机用液控单向阀,在阀芯下端外圆周壁上制有上下两端槽壁均为喇叭状的锥形结构的环形凹槽,阀体下端面以及阀体侧壁上由下至上依次设有与空腔连通的一号油孔、二号油孔和三号油孔,下端部位于一号油孔内的阀芯装于空腔内,空腔内设有下端抵于空腔内壁上的第一阶形面上的弹簧且弹簧套装于阀芯上,弹簧上端抵于弹簧垫片上且弹簧垫片内台阶面抵于钢丝挡圈上,弹簧使环形凹槽下端的锥形环面与一号油孔顶壁和空腔连通处接触。本技术方案通过优化单向阀的密封结构,为单向阀的通断提供良好的密封条件,保证单向阀工作可靠性,为一号油孔与阀芯下端提供有效的密封结构,设计的锥形环面具有密封补偿功能,大大提高了密封效果。
Hydraulic control one-way valve for railway turnout electro-hydraulic switch machine
铁路道岔电液转辙机用液控单向阀
2021-03-05
Patent
Electronic Resource
Chinese
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