Full-pressure high-speed exhausting air-supplying special valve

Abstract

The invention provides a full-pressure high-speed exhausting air-supplying special valve which comprises a cylinder, a main valve cavity arranged on the lower portion of the cylinder, a guiding exhaust barrel arranged in the main valve cavity, a sealing floating body arranged in the guiding exhaust barrel, a piston spring and a main valve piston with a vertical through hole. The main valve piston comprises a piston column, a cylinder piston and a sealing baffle, wherein the cylinder piston and the sealing baffle are arranged at the upper end and the lower end of the piston column respectively. A side wall on the lower portion of the cylinder is provided with an exhausting air-supplying port, a cavity wall of the main valve cavity is provided with a main valve port, the piston spring is sleeved on the piston column and located between the cylinder piston and an upper cavity wall of the main valve cavity, and the upper end of the sealing floating body corresponds to a lower port of the vertical through hole. The full-pressure high-speed exhausting air-supplying special valve has the advantages that the special valve is scientific in design, automatic sealing of the valve can be achieved without utilizing a floating ball and a lever, the sealing performance is good, and the discharging performance is good when water and gas alternate with each other.

Description

technical field [0001] The invention relates to an exhaust valve, in particular to a full-pressure, high-speed exhaust and air supplement special valve used for explosion-proof and leak-proof in pressurized water supply pipelines. Background technique [0002] Existing exhaust valves mainly use hollow floating balls combined with the principle of levers to control the opening and closing of the exhaust port. However, the commonly used floating balls are generally hollow stainless steel balls, which are difficult to manufacture, and the strength of hollow floating balls is low. It is easy to be deformed under the condition of atmospheric hammer or water hammer; moreover, the structure of the lever is unstable and prone to jamming, so the hollow float and lever often cause a lot of trouble in use, and it is difficult to meet the exhaust needs of rapid opening and closing; Although some designs use pistons instead of hollow floats and levers, the sealing performance of the pist...

AI Technical Summary

Problems solved by technology

[0002] Existing exhaust valves mainly use hollow floating balls combined with the principle of levers to control the opening and closing of the exhaust port. However, the commonly used floating balls are generally hollow stainless steel balls, which are difficult to manufacture, and the strength of hollow floating balls is low. It is easy to be deformed under the condition of atmospheric hammer or water hammer; moreover, the structure of the lever is unstable and prone to jamming, so the hollow float and lever often cause a lot of trouble in use, and it is difficult to meet the exhaust needs of rapid opening and closing; Although some designs use pistons instead of hollow floating balls and levers, the sealing performance of the pistons is often not good enough, it is easy to leak water and air, and the valve discharge effect is not good in the case of water and gas.

Therefore existing design has some inconveniences in normal use

Images