Air valve unit with functions of maintenance, filtering and reverse cleaning

Abstract

The invention relates to the technical field of air valves, and discloses an air valve unit with functions of maintenance, filtering and reverse cleaning. The air valve unit with the functions of maintenance, filtering and reverse cleaning comprises an air valve, a filter, a first on-off mechanism, a second on-off mechanism, and T-shaped pipes. Both ends of each T-shaped pipe are a pipe connectionopening and an impurity sewage outlet respectively. The air valve is connected with the upper ends of the T-shaped pipes. The filter is a double-layer filter cartridge. The filter cartridge is fixedat the lower end of the air valve, and the length of the filter cartridge covers a valve opening of the air valve. The ports of the filter cartridge used for receiving impurities corresponds to the pipe connection opening and the impurity sewage outlet respectively, and port diameter is larger than diameter of the T-shaped pipe. The first on-off mechanism is arranged on the T-shaped pipe between the filter cartridge and the pipe connection opening. The second on-off mechanism is arranged on the T-shaped pipe between the filter cartridge and the impurity sewage outlet.

Description

technical field [0001] The invention relates to the technical field of air valves, in particular to an air valve group with the function of maintenance, filtration and backwashing. Background technique [0002] For various air valves installed on the pipeline, inspection valves should be installed at their inlets for air valve inspection. Maintenance valves usually use manual gate valves or manual butterfly valves, but they only function as conduction or cut-off, and cannot filter impurities in pipeline media, which usually contain various impurities, especially in raw water conditions, such as leaves, aquatic weeds, etc. , all kinds of floating objects and wastes are common. Once the impurities in the medium enter the air valve, the seal of the air valve will fail, causing the air valve to leak for a long time, which will cause serious consequences. If a separate maintenance valve and a separate filter are installed at the same time, the installation position of the air va...

AI Technical Summary

Problems solved by technology

Maintenance valves usually use manual gate valves or manual butterfly valves, but they only function as conduction or cut-off, and cannot filter impurities in pipeline media, which usually contain various impurities, especially in raw water conditions, such as leaves, aquatic weeds, etc. , all kinds of floating objects and wastes are common

Once the impurities in the medium enter the air valve, the seal of the air valve will fail, causing the air valve to leak for a long time, which will cause serious consequences. If a separate maintenance valve and a separate filter are installed at the same time, the installation position of the air valve will be greatly increased , even if a separate filter is installed, manual maintenance is troublesome, especially in narrow valve wells, or when the pipeline is higher than the ground and the air valve is higher than the pipeline by a certain height, it will bring great difficulties to manual maintenance and risk

[0003] In addition, due to the large water flow in the valve, the requirements for the filter used in the valve are very high, and it is necessary to take into account the filtration fineness and structural strength. For example, if the filter with high filtration fineness is used, its strength is not enough. It is easy to be squeezed and deformed. If a high-strength filter is used, although its strength meets the requirements, its filtration fineness is low, and it cannot meet the valves with high filtration requirements such as air valves. There is an irreconcilable contradiction in the strength of the cylinder. At present, there is no filter specially used for valves.

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