Actuators for screw linear valves
A technology of actuator and stroke type, which is applied in the field of actuators of screw straight-stroke valves, and can solve the problems that hydraulic actuators cannot be used and affect the automatic control of hydraulic control system equipment, etc.
Inactive Publication Date: 2017-02-08
SHANGHAI RONGDE ENG EQUIP
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
For this reason, the shut-off valve used in important parts generally cannot use hydraulic actuators to realize remote control operation, which makes the control of the shut-off valve have certain limitations, which affects the construction of the entire hydraulic control system and the automatic control of equipment.
Method used
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Embodiment Construction
[0018] Such as Figure 1 to Figure 8 As shown, the actuator of the present invention for the screw straight-stroke valve includes the screw 30 for opening and closing the straight-stroke valve 1, and also includes the base 10, the housing 11, the upper cover 12, the over-torque protection sleeve 2, the torque sleeve 3, the tooth shaped coupling body 4, rotor 5, multi-section curved guide rail 6, distribution sleeve 8, distribution shaft 9, two ferrule joints 13, several hydraulic plunger bodies 7 and several steel balls 71, the base 10, the housing 11 and the upper The cover 12 is sequentially connected by screws to form a cavity in the housing 11, the screw 30 extends from the base 10 into the cavity of the housing 11, the over-torque protection sleeve 2 is provided with an internal thread and screwed on the screw 30, the torque sleeve 3 is sleeved on the outer ring of the torque protection sleeve 2 and drives the torque protection sleeve 2 to rotate, the distribution shaft 9...
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The invention discloses an actuator for a straight stroke type valve with a threaded rod. A base, a shell body and an upper cover form an outer shell, the threaded rod of the valve stretches into the outer shell, an excessive-torque protective jacket is screwed to the threaded rod, a torsion sleeve is arranged on the outer circle of the excessive-torque protective jacket, a flow allocation shaft is connected to the outer circle of the torsion sleeve in a sleeved mode and provided with two access grooves, two clamping sleeve joints are communicated with the two access grooves, a flow allocation sleeve is connected to an outer circle of the flow allocation shaft in a sleeved mode and provided with a plurality of allocation oil holes communicated with the two hydraulic oil access grooves, a rotor is connected to an outer circle of the flow allocation sleeve in a sleeved mode, a tooth-shaped coupling body is connected with the rotor and the torsion sleeve, and multiple sections of curve guide rails are fixed to an inner circle of the shell body and matched with the rotor in position. The rotor is driven by hydraulic oil connected with the two clamping sleeve joints to rotate, the rotor drives the torsion sleeve and the excessive-torque protective jacket to rotate, and the excessive-torque protective jacket drives the threaded rod to rotate to enable the straight stroke type valve to be opened or closed. The actuator is installed on the straight stroke type valve, the valve is driven to be opened and closed through hydraulic power, the situation that the sealing face of the valve cannot leak is guaranteed, and safety and reliability are achieved.
Description
technical field [0001] The invention relates to an actuator for a hydraulic valve, in particular to an actuator for a screw straight-stroke valve. Background technique [0002] Among various types of valves, the globe valve of the screw straight stroke valve is a forced sealing valve. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. Therefore, the globe valve usually uses a screw as the valve stem, and the valve disc moves up and down through the rotation of the screw to realize the closing or opening of the globe valve. Utilize the mechanism that the screw can be locked to achieve the requirement of forced sealing. [0003] However, the usual hydraulic valve actuators drive the disc action of the cut-off valve through the linear motion of the hydraulic cylinder. In view of the fact that the hydraulic actuator relies on the linear motion of the oil cylinder, the valve stem of the globe valve currently used for h...
Claims
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IPC IPC(8): F16K31/12F16K37/00
CPCF16K31/1225F16K37/0016
Inventor 冯晓明
Owner SHANGHAI RONGDE ENG EQUIP