A post-adjustable three-orifice compound anti-hammer air valve group

Abstract

The invention discloses a rear adjustable three-hole composite type waterproof hammer air group valve. The air group valve is integrally or separately arranged on a liquid conveying pipeline or a container system, a high-speed exhaust hole of the air group valve can be adjusted and controlled, is arranged alone, and is generally smaller than suction holes, the high-speed exhaust hole and the high-speed suction holes are formed separately and are not shared for use, independent model selection and adjustment can be conducted, the requirements of high-speed exhaust and high-speed gas suction for two different quantities of flow or two different diameters or two proportions are met, and meanwhile two built-in type gas bags are formed quite ingeniously. The group valve combines independent intermediate-speed exhaust, independent high-speed gas suction and trace amount exhaust, and has a dozen of functions, namely, the independent intermediate-speed exhaust function, the independent high-speed gas suction function, the trace amount exhaust function, the function of a high-suction and intermediate-exhaust waterproof hammer, the function of a high-suction and trace-exhaust waterproof hammer, the function of a built-in gas bag waterproof hammer, the built-in gas bag anti-freezing function, the function of a rear adjusting control valve and the function of monitoring the hole pressure difference and the total pressure difference on site in the empty pipe liquid filling process through two pressure meters. The various ventilation and safety protection requirements of a liquid path system can be met.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a post-adjustable three-orifice composite anti-hammer air valve group. Background technique [0002] The existing ordinary air valve uses the same orifice as the high-speed exhaust port and the high-speed suction port, which cannot be selected independently. The traditional high-speed exhaust port is usually too large in diameter and cannot be adjusted and controlled. Relatively small, the suction volume is obviously insufficient, the risk of negative pressure is high, the trace exhaust hole is single and small, only one size is 1.6mm, (see the exhaust valve industry recommended standard CJ / T 217-2005), cannot Satisfy the needs of large pipe micro exhaust. [0003] When the empty pipe of the pipeline or container system is filled with water or liquid, the high-speed exhaust orifice will exhaust at high speed, and a certain gas pressure difference will be generated at the orifice....

AI Technical Summary

Problems solved by technology

[0002] The existing ordinary air valve uses the same orifice as the high-speed exhaust port and the high-speed suction port, which cannot be selected independently. The traditional high-speed exhaust port is usually too large in diameter and cannot be adjusted and controlled. Relatively small, the suction volume is obviously insufficient, the risk of negative pressure is high, the trace exhaust hole is single and small, only one size is 1.6mm, (see the exhaust valve industry recommended standard CJ / T 217-2005), cannot Meet the needs of large pipe micro exhaust

[0003] When the empty pipe of the pipeline or container system is filled with water or liquid, the high-speed exhaust orifice will exhaust at high speed, and a certain gas pressure difference will be generated at the orifice. When the pressure difference reaches 2kPa ~ 30kPa, ordinary high-speed exhaust valve or composite The floating ball of the high-speed exhaust valve will be blown up by the high-speed airflow, blocking the large orifice of the high-speed exhaust, so that the high-speed exhaust valve will stop the high-speed exhaust in advance. The consequence is that most of the gas in the pipeline or container will not be discharged. The pipeline or container is not exhausted completely, cannot be completely filled with water or liquid, half liquid and half gas, which seriously affects the infusion efficiency of the pipeline or the liquid filling volume of the container, resulting in unstable pressure, alternating contact with liquid vapor, resulting in corrosion of the pipe wall and inaccurate measurement. Accuracy and other issues

[0004] After the large orifice of the traditional composite exhaust valve is blown and blocked in advance, it will take a long time if only relying on the micro exhaust orifice to remove the remaining large-capacity gas, which will greatly prolong the time for filling the empty pipe of the pipeline or container , seriously reducing work efficiency, long-distance pipelines may even take 1 to 2 months to complete the filling of empty pipes, which has a particularly significant impact on northern regions where there is only a short summer

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