Double floating pneumatic shut-off valve

Valve double floating pneumatic shut-off valve Sun Rongquan, Guo Yi, Zhao Shuangshuang Shenyang University, Shenyang, Liaoning, 44 is movable, simple structure, flexible opening and closing, low cost, easy to achieve automatic control.

1 Overview The shut-off valve is mostly manual, regardless of the structure of its valve flap and valve body. In some equipment and processes, the shut-off valve is required to follow the instructions or according to some of the parameters. The closing force of the shut-off valve is hydraulic or pneumatic.

The electric valve is driven by the motor through the mechanical speed; the moving valve flap moves or rotates like a butterfly plate, or the translation is like a shutter. The electric valve has a complicated structure and a large driving device, which has a long opening and closing time and a high price.

The hydraulic valve is powered by a hydraulic cylinder or a hydraulic motor. Move the flap. In addition to the liquid helium cylinder or motor. The power source also needs the hydraulic pump hydraulic valve oil source and control system, and the system is more complicated. The traditional pneumatic valve is similar to the hydraulic valve. The difference between the medium and the medium used in the factory is that the self-control stop valve used in various industrial sectors still has a complicated structure, inflexible opening and closing, long switching time and many auxiliary components. The price is high and so on.

2 Structure and working principle Pneumatic shut-off valve 1 consists of cylinder hose upper and lower splint and valve body. The hose of the valve is fixed by the valve body to fix the shaft to be fixed by the connecting rod and the lower clamping plate, and the piston rod and the upper clamping plate are fixed to the body, the cylinder and the dip are moved, the rod can be moved upward, and the cylinder is the smashing rod The buckle is connected to the pipeline through the end flange of the valve body.

When the cylinder has no air in the upper cavity of the rod cavity, the rod cavity is connected to the atmosphere. The cylinder moves up with the lower jaw and the connecting rod under the action of compressed air, and the piston rod and the upper clamping plate move downward. The hT splint forms a clamped state to the hose, the hose is flattened at the shaft center, and the valve is closed. When the cylinder has a cavity under the rod cavity, the cylinder has no rod cavity to the atmosphere. Under the action of compressed air, the private piston rod and the upper clamping plate under the cylinder and the lower clamping plate are moved, and the upper and lower clamping plates are separated from the rubber tube, and the rubber treatment is restored to the original state under the action of self-twisting elasticity and medium pressure inside the tube, and the valve is opened.

Depending on the characteristics of the media. The quality of the hose is also used to make a variety of food containers for milk and vinegar. The service life of the hose can be 15,000 times. The data provided by the manufacturer of the rubber hose 13 and the control part of the cylinder and pneumatic part of the shut-off valve. The reversing valve joint body can work by connecting the compressed air tube when there is a concentrated version of the air. In the place where there is no concentrated compressed air, an air compressor can be used to supply air to the air tank, and the gas tank can input pressurized gas to the cylinder. The air compressor can work intermittently.

The volume of the gas tank can be obtained by the following formula; the volume of the white mountain air consumed by the cylinder during the recovery cycle. The maximum pressure in the cadaver 1 tank is the absolute pressure of the gas in the Jj tank. With the working cycle of 1 cylinder, 8 according to the juice calculation and field measurement, the remaining data can be determined according to the number of valves, the switching frequency and other relevant conditions. If the air compressor is working intermittently, the electrical contact pressure can be installed on the air tank. The lower limit is 0.5 cubits. When the pressure in the gas tank drops to this value, the air compressor is started by the electric contact pressure through the controller. When the pressure in the gas tank reaches 1.2 cubits, 3, the upper limit of the electric contact pressure is reached, and the air compressor stops working.

The air control position 2 of the valve is that the rod chamber is connected to the compressed air, and the rodless chamber is connected to the atmospheric valve. When the solenoid valve is energized, the valve closes. In actual use, according to the position of the valve and the tasks undertaken, it is determined that the conclusion of the cylinder and solenoid valve 4 is compared with the existing self-controlled shut-off valve. The pneumatic shut-off valve has the characteristics of small number of structural simple parts, fast and flexible opening and closing, reliable performance, long life of wearing parts and low cost. Field use proves that the valve is suitable for a wide range of fluid media containing solid suspended solids and corrosive.

Yang Yuanquan valve design manual. Huajing Machinery Industry Publishing Machinery and Machinery Industry Press, 1991.

Wu Hao and other pneumatic engineering manual elbow. Beijing National Defense Industry Publishing

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