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Screw drive hydraulic actuator for valve drive

A technology of hydraulic actuator and screw transmission, which is applied in the direction of valve operation/release device, valve details, valve device, etc., which can solve the problem of incomplete application of valve control, reduce equipment footprint, facilitate connection, and reduce equipment cost effect

Active Publication Date: 2016-06-22
LUOYANG REASTAR TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, pneumatic or electric valves are mostly used for automatic valve control in China. Due to the characteristics of pneumatic electric valves, they are not completely suitable for valve control that requires large torque transmission and requires the total mass and volume of equipment.

Method used

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  • Screw drive hydraulic actuator for valve drive
  • Screw drive hydraulic actuator for valve drive
  • Screw drive hydraulic actuator for valve drive

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Experimental program
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Embodiment Construction

[0019] As shown in the figure: a screw drive hydraulic actuator for valve driving, including a cylinder body 1, an upper cylinder head 2 and a lower cylinder head 3, the cylinder body 1 is provided with a piston 4 that can displace in the axial direction , and the piston 4 and the inner wall of the cylinder body 1 are connected in a spiral fit. The spiral fit structure can convert the linear stroke of the piston 4 into a rotary motion. The upper part of the piston 4 is cylindrical, and the lower part is cylindrical. The upper outer wall of the piston 4 has The thread matched with the inner wall of the cylinder body 1, the lower part of the piston 4 is sleeved on the upper end of the output shaft 5, and the side wall of the lower part of the piston 4 is provided with a through hole which is beneficial to the rapid circulation of hydraulic oil. The cylinder body 1 is located in the cavity between the lower cylinder head 3 and the piston 4 and is provided with an output shaft 5, o...

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PUM

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Abstract

The invention relates to a screw drive hydraulic actuator for valve drive. The screw drive hydraulic actuator comprises a cylinder body, an upper cylinder cover and a lower cylinder cover; a piston capable of performing displacement in the axial direction is arranged in the cylinder body, and the piston and the inner wall of the cylinder body are in screw fit connection; the position, located in a cavity between the lower cylinder cover and the piston, of the cylinder body is provided with an output shaft; one end of the output shaft is in spline fit connection with the piston, and the other end of the output shaft stretches out of the lower cylinder cover and is provided with a valve rod connecting port; an upper oil cavity is formed between the piston and the upper cylinder cover, and a lower oil cavity is formed between the piston and the output shaft; and the upper oil cavity and the lower oil cavity are connected to a hydraulic system through an oil way in the cylinder body. The screw drive hydraulic actuator is compact in structure and convenient to connect; and under the condition of outputting same torque, the equipment size is smaller, the weight is smaller, and the screw drive hydraulic actuator and other devices form a complete set more easily.

Description

technical field [0001] The invention relates to the technical field of valve automatic control, in particular to a screw transmission hydraulic actuator used for valve driving. Background technique [0002] At present, pneumatic or electric valves are mostly used for automatic valve control in China. Due to the characteristics of pneumatic electric valves, they are not completely suitable for valve control that requires large torque transmission and requires the total mass and volume of equipment. As the requirements for automatic control of valves in various industries are getting higher and higher, the demand for hydraulic actuators driven by hydraulic power to realize valves is proposed. According to market conditions, hydraulic actuators with screw transmission are compared with rack-and-pinion The actuator has the advantages of smaller size, lighter weight, fewer parts, and convenient maintenance and repair, which meets the requirements of various fields for hydraulic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/122F16K37/00
CPCF16K31/122F16K37/0008
Inventor 夏泉岭王斌虎杨强强宋丹丹李辉
Owner LUOYANG REASTAR TRANSMISSION