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    Home > Active Ingredient News > Drugs Articles > Structure and performance analysis of exhaust valve

    Structure and performance analysis of exhaust valve

    • Last Update: 2014-04-28
    • Source: Internet
    • Author: User
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    The structure and performance analysis of exhaust valve analyzes the structure, type, installation and application of exhaust valve, analyzes and compares the performance of composite exhaust valve and traditional exhaust valve The three precision floating ball (cylinder) type exhaust valve is an early production inlet and exhaust valve of Zui Generally, it can't automatically exhaust when the pressure is greater than 0102 MPa It can only conduct air intake and water filling and exhaust after water filling or accident maintenance, and the speed of air intake and exhaust is slower than other forms, which is only suitable for small amount of air intake and exhaust The three precision floating ball (cylinder) lever exhaust valve is improved on the basis of floating ball (cylinder) exhaust valve Through the lever principle, it can also exhaust under the condition of high pressure, and the exhaust Zui high pressure generally does not exceed 0.08 MPa The structure of the above two types of exhaust valves is simple, but there are some defects When water and gas are in phase, the large exhaust port can only discharge the gas in * section, and can't exhaust continuously When the gradient of the water pipeline is not large, most of the pipelines are in the plunger flow state of one section of water and one section of gas The buoyancy of the floating ball type exhaust valve is small After the gas in * section is discharged, the water will lift the floating ball The second section has pressure Assuming the pressure is 012mpa, the holding force of the gas to the floating ball is equal to the area of the exhaust port multiplied by the internal pressure of the pipeline, the holding force of the DN100 exhaust valve is about 1500 n, and that of the DN300 exhaust valve is about 14000 n, Therefore, it is impossible for the large exhaust port to automatically open the exhaust and lose the exhaust function in the plunger flow state The three precision cylinder type exhaust valve cylinder type exhaust valve is a new device which is made according to the cylinder principle and different from any other air inlet and exhaust valve Its principle is to control the pneumatic diaphragm action in the cylinder with the pontoon lever, so as to control the opening and closing of the exhaust port of the valve body Under the condition of high pressure (below 1MPa), the gas with or without pressure can be discharged at high speed, no matter it is multi-stage water column and gas column The main features of this type of exhaust valve structure are: the effective exhaust diameter of large or small exhaust port or only large exhaust port is not less than 70% of the nominal diameter of the exhaust valve, the exhaust diameter is large, the exhaust speed is fast, and in any case, the exhaust can be high-speed In general, when the designer selects the exhaust valve, the exhaust volume is calculated by the nominal diameter of the exhaust valve The cylinder type exhaust valve can completely meet the design requirements, and really play a role in preventing water hammer and pipe explosion The three precision combined exhaust valve is a commonly used exhaust valve of Zui in China It is based on the combination and improvement of the floating ball (cylinder) and floating ball (cylinder) lever exhaust valve The floating ball lever type exhaust device is used for micro exhaust under pressure; the floating ball (cylinder) type device is used for large intake and exhaust under water filling or other conditions The size of the air inlet and exhaust port can be increased, so that the air inlet and exhaust speed can be greatly improved.
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