High precision positioning turn-off valve capable of being turned on and off at high speed and use method thereof

Abstract

The invention discloses a high precision positioning turn-off valve capable of being turned on and off at a high speed. The high precision positioning turn-off valve comprises a valve body, a valve element structure arranged in the valve body to move upward or downward and a servo electrical cylinder arranged at the upper end of the valve body, wherein the output end of the servo electrical cylinder extends downward into the valve body to be connected to the valve element structure, the servo electrical cylinder connected to the valve element structure can drive the valve element to move in the valve body, the servo electrical cylinder can turn on the turn-off valve when driving the valve element structure to move upward, and can turn off the turn-off valve when driving the valve element to move downward; a guide rail assembly is arranged on a side edge of the valve element structure and comprises a first guide rail assembly and a second guide rail assembly, and the first and second guide rail assemblies are arranged on two sides of the valve element structure respectively. In addition, the invention further discloses a use method of the high precision positioning turn-off valve capable of being turned on and off at the high speed. The high precision positioning turn-off valve capable of being turned on and off at the high speed has the advantages of being short in on-off time, high in positioning precision, high in limiting precision, small in impact vibration and small in noise.

Description

Technical field[0001]The present invention relates to the field of valve equipment, and more particularly to a high-precision positioning shutdown valve capable of achieving high-speed opening and closing; further, the present invention also relates to the use of the shutdown valve.Background technique[0002]At present, the shut-off valve on the market mainly has a variety of structural types such as a baffle valve, a table valve, butterfly valve, a ball valve, wherein the full-pass type valve has a baffle valve, a tabule valve, a ball valve, a valve of the same caliber. The baffle valve and the ball valve are large (the structure is suitable for small-diameter valves), which takes up a large installation space, compact, and the installation space is small.[0003]The driving method of turning off valves includes four categories: electric (motor + T-type screw), pneumatic, hydraulic, manual. The same caliber, the same type of valve, the hydraulic pressure is faster and the electric shu...

AI Technical Summary

Problems solved by technology

For valves with the same caliber and the same type of structure, the closing speed of hydraulic pressure is faster than that of pneumatic and electric, but the maintenance of the hydraulic system is cumbersome, and it is easy to pollute the site. For valves with a caliber width of more than 300mm in the movement direction, the valve movement time is greater than 2s, so it is widely used in the market. Most of them are pneumatic and electric valves. Pneumatic valves have large shock and vibration and poor positioning accuracy. Electric (motor + T-shaped screw) has slow movement speed.

Some scientific research institutes and enterprises require medium and large valves (caliber width in the direction of movement > 300mm) that can simultaneously meet full bore, high-speed opening and closing (opening and closing time < 1.5s), high-precision positioning, small vibration impact and low noise, and smooth circulation. The medium contains corrosive gas and dust, and the above-mentioned traditional shut-off valve driving method and valve structure cannot meet the requirements.

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