Valve hydraulic hand wheel

Abstract

The invention provides a valve hydraulic hand wheel. The valve hydraulic hand wheel comprises a driving valve rod, a driven valve rod and a shell. One end of the driving valve rod is arranged in the shell, and the other end of the driving valve rod extends out of the shell. A driving valve rod piston is arranged at the end, arranged in the shell, of the driving valve rod. One end of the driven valve rod is arranged in the shell, and the other end of the driven valve rod extends out of the shell and is connected with a valve element of a valve. A driven valve rod piston is arranged at the end, arranged in the shell, of the driven valve rod. A liquid medium is sealed between the driving valve rod piston and the driven valve rod piston. The driving valve rod drives the driven valve rod to move through the hydraulic action of the liquid medium. The driven valve rod drives the valve element to move so that the valve can be opened or closed. The hydraulic mode is adopted in the valve hydraulic hand wheel, on the basis of the pascal law, the driving valve rod is driven to move, the liquid medium is pushed by the driving valve rod piston so that the pressure intensity can be generated in the liquid medium and the driven piston rod piston can be pushed, the driven valve rod drives the valve element to move, and the valve is opened or closed.

Description

technical field [0001] The invention relates to the field of valve opening devices, in particular to a valve hydraulic handwheel. Background technique [0002] During the use of manual valves, due to the large sealing and opening torque required for large-diameter valves and high-pressure valves, the current solutions are: 1. Use larger handwheels (or use small pitch thread transmission); 2. Use worm gear mechanism; 3. Adopt automation systems such as motors and pneumatics. [0003] The disadvantages of the above methods are: [0004] 1. When a large handwheel is used, first of all, it is inconvenient for one person to operate. According to the relevant calculation of the valve, when the diameter of the handwheel reaches a certain level, the torque generated by one person will not increase, and two or more people may be needed. In addition, the installation space of high-pressure valves in some places is small, but the diameter of the required handwheel is large, resulting...

AI Technical Summary

Problems solved by technology

[0004] 1. When a large handwheel is used, first of all, it is inconvenient for one person to operate. According to the relevant calculation of the valve, when the diameter of the handwheel reaches a certain level, the torque generated by one person will not increase, and two or more people may be needed. In addition, the installation space of high-pressure valves in some places is small, but the diameter of the required handwheel is large, resulting in problems that cannot be installed or the manual operation is cumbersome; finally, the valve head of the large-diameter handwheel is large, and the appearance is not beautiful.

[0005] When using a small pitch thread, the stress situation is not good, it is necessary to use a thicker screw, and the number of turns of the hand wheel is large, which is inconvenient to design and use.

[0006] 2. The turbine and worm mechanism is adopted. This mechanism adopts a relatively large worm gear and worm transmission, and drives the turbine mechanism with a small force to generate a large force. The cost of this mechanism is relatively high, and half of it is now a casting product, which is heavy and not only increases the number of valves. The weight of the valve increases the overall cost of the valve, making it difficult to install and maintain the valve, and the maintenance cost is relatively high

[0007] 3. The use of electric, pneumatic and other automation systems requires a certain amount of basic investment, such as electricity and gas, etc., the cost is high, especially in remote areas, it is particularly difficult, and there are certain risks in use

[0008] 4. Some valves need to be closed manually and quickly

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