Hydraulic lifting device for In-service Test of safety valve and pressure relief valve

摘要

The present invention is installed on the upper surface of the safety valve or pressure relief valve fully to withstand vibration or the force of the grid , relates to a lifting device of a safety valve and a pressure release valve for the hydraulic pressure is maintained and the axis alignment of the safety valve or pressure relief valve is not pressed in the state, the present invention provides a body fastening means at a predetermined interval ( 100) has a cylindrical seating and a base 102 on which is seated on an upper surface of the safety valve or pressure relief valve (10); And first, second and third legs for support 106, 108, 110 having a plurality of fixing holes 104 are formed vertically on the body on an upper surface of the seat base (102); The first by the user, and the hydraulic cylinder 112 is secured to the sliding between the second and third support leg 106, 108, 110; Being made a center axis aligned with the state of the safety valve or pressure relief valve 10, the shaft moving in the top dead center or bottom dead center of the hydraulic cylinder when the hydraulic supply of the hydraulic supply (114) 112 (116) and; Central installed and move, and the displacement sensor 118 for sensing movement of the axis of the safety valve or pressure relief valve (10) of the shaft (116) in the third leg of the support (110); Central installation and moving, with a tensile stress sensor 120 for sensing the tensile stress axis of the safety valve or pressure relief valve (10) of the shaft 116 to the shaft 116; Doedoe installed at a lower portion of the shaft 116, the cylindrical holder and the spindle 122 to move the spindle nut 300, the up / down movement of the safety valve or pressure relief valve of the shaft 116; Is installed on the outer peripheral surface side of the safety valve or pressure relief valve is configured to detect the acoustic sensor 124 to sense the sound of air emitted at the second opening of the safety valve or pressure relief valve.