Inner drive axial flow type adjusting valve
A technology of regulating valve and drive shaft, applied in valve details, valve device, engine components, etc., can solve the problems of poor sealing reliability, low adjustment accuracy, short service life, etc., and achieve good sealing performance, high adjustment accuracy, and service life. long effect
Active Publication Date: 2017-08-18
ZHEJIANG BETHEL TECH CO LTD
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Problems solved by technology
Its disadvantages are: the two racks of the angle transmission mechanism have matching errors, the racks and their guide holes are easy to wear during the transmission process, resulting in transmission errors, low adjustment accuracy, short service life, and easy contact with the valve seat when the valve core is closed. Impact occurs, loud noise, poor sealing reliability
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[0011] like figure 1 The built-in drive axial flow control valve shown includes valve body 1, valve core 11, valve seat, and control mechanism. The valve body 1 and its two flanges are integrally cast. The long-life and maintenance-free use requirements of the long-distance pipeline require that the inner cavity of the valve body 1 is provided with a diversion cover 2, and the outer surface of the diversion cover 2 is connected to the inner cavity wall of the valve body 1 through a connecting rib 18. The diversion cover 2 has a cone Structure, the cone part of the cone is located on the inlet side of the valve body 1, the guide cover 2, the connecting rib 18 and the valve body 1 are integrally cast, and the outer surface of the guide cover 2 and the inner cavity wall of the valve body 1 form an annular flow channel , the annular channel has an equal flow area, the valve seat is set at the outlet port of the valve body 1, the valve core 11 adopts a U-shaped hollow cylinder stru...
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The invention relates to an inner drive axial flow type adjusting valve. The inner drive axial flow type adjusting valve comprises a valve body, a valve element, a valve seat and a control mechanism. A flow guiding cover is arranged in an inner cavity of the valve body, an annular runner is formed between the outer surface of the flow guiding cover and the inner cavity wall of the valve body, and the outer circle face of the valve element is in movable sealing fit with an inner hole in the outlet end of the flow guiding cover. Mainly, a hydraulic control mechanism is adopted as the control mechanism and is composed of a piston transmission device and an oil pressure control device. The oil pressure control device is composed of a flow / pressure sensor, a PID controller, a servo motor and an oil mass controller. Two output ports of the oil mass controller communicate with two oil pressure connectors correspondingly. A damping slow closing device and a damping slow opening device are arranged in the piston transmission device, collisions of the valve element and the valve seat and other components in the opening and closing processes are reduced, and the beneficial effects that the adjusting precision is high, the service life is long, the running noise is low, and the sealing performance is good are achieved; and the inner drive axial flow type adjusting valve is suitable for control valves of crude oil, product oil and natural gas long conveying pipeline pump stations, receiving stations and other work conditions.
Description
technical field [0001] The invention belongs to the field of valves, in particular to an axial flow regulating valve. The invention is applicable to the control valves of crude oil, refined oil, natural gas long-distance pipeline pump stations, receiving stations and other working conditions. Background technique [0002] The axial flow regulating valve is mainly composed of a valve body, a valve core, and a valve stem. The valve body and the flanges at both ends are of an integral structure. , Natural gas long-distance pipeline. At present, the typical structure of the axial flow control valve used in the oil and gas industry at home and abroad is represented by the product of MOKVELD company in the Netherlands. The valve core is controlled and operated by a 90° angular transmission mechanism. Composed of meshing racks, the two racks are respectively on the valve core rod and the valve stem, and the valve stem moves up and down to drive the valve core rod to move left and...
Claims
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IPC IPC(8): F16K31/04F16K31/122F16K47/02
CPCF16K31/04F16K31/122F16K47/02
Inventor 周广伶林光办李平
Owner ZHEJIANG BETHEL TECH CO LTD