Pipeline filter screen disassembly-free cleaning method and device

Abstract

The invention discloses a disassembly-free cleaning method and device for a pipeline filter screen. A double-control valve is arranged between a water inlet control valve and the pipeline filter screen by utilizing the characteristic that the return water of a system pipeline has certain pressure; backwater of the main pipeline is used for flushing the pipeline filter screen in the direction opposite to the water supply direction, and impurities on the filter screen are discharged out of the pipeline system through drain holes of the double-control valve. According to the technical scheme, professional personnel, tools (especially special tools), water inlet and water return control valves and pipelines and the filter screens do not need to be closed, and people with general behavioral ability can complete the pipeline filter screen cleaning operation at any time without needing to use the tools, closing the water inlet and water return control valves and disassembling the pipelines and the filter screens. The pipeline filter screen is easy and convenient to clean and maintain, the cost is low, the system service life is long, and contradictions between clients and service parties are reduced; meanwhile, the double-control valve is mature in technology, simple in structure, reliable in work, low in price and convenient to operate, and has high practical application value.

Description

technical field [0001] The invention relates to a method and device for cleaning a pipeline filter screen without dismantling, in particular to the technical field of cleaning without dismantling a pipeline filter screen by backwashing with backwater. Background technique [0002] In the central heating and central air-conditioning medium water pipeline system, a filter screen is usually set between the branch control valve of the water supply pipeline and the meter to prevent debris (mainly including debris outside the system brought by supplementary water leaked from the supplementary pipeline, All kinds of crystalline salts formed due to the decrease in solubility caused by temperature changes, insoluble or slightly soluble scales, microbial adsorption groups and moss generated by chemical reactions of dissolved salts and metal corrosion, etc.) enter and block pipes and equipment. After running for a certain period of time, the filter screen will be blocked by blocking an...

AI Technical Summary

Problems solved by technology

Since the above operations are very cumbersome, and most users generally do not have the operation skills and do not always have working tools (especially special wrenches and keys for opening and closing control valves), the cleaning of pipeline filter screens is generally done by professionals.

However, the number of users of central heating and central air-conditioning is generally large, and there are problems of heavy workload, long cycle and high cost in filter cleaning, and sometimes conflicts and disputes are caused due to untimely maintenance.

In addition, for pipelines with a lot of impurities in the medium water and small holes in the pipeline filter, in order to ensure the normal operation of the system, the cleaning frequency of the pipeline filter has to be increased. Huge maintenance workload and high maintenance costs

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