Sand filtering device used for preventing water meter from being blocked

Abstract

The invention relates to a sand filtering device used for preventing a water meter from being blocked. The sand filtering device comprises at least one filtering module. Each filtering module comprises a retention chamber and a sand settling pipe. Each retention chamber is a pipe with the cross sectional area larger than that of water pipes. Each sand settling pipe is connected with the lower portion of the corresponding retention chamber. A plurality of sand filtering nets are embedded into the pipe wall of the retention chamber. The retention chambers are communicated in parallel through the water pipes to be connected to the water pipe at the water inlet of the water meter in series. Compared with the prior art, the sand filtering device has the advantages that the content of sand when water flow reaches the water surface is obviously reduced, the service life of the water meter is prolonged, the structure is simple, and installation is convenient.

Description

technical field [0001] The invention relates to a sand filter device, in particular to a sand filter device for preventing water meters from being blocked. Background technique [0002] During the construction of the dewatering well, pumps are used to pump groundwater and sand-filling measures are taken to filter the gravel in the groundwater, but there are still some small-sized gravels that have not been filtered. blockage and affect its normal use. [0003] Chinese patent CN2713443 discloses an anti-theft water meter with a filter screen, including a one-way valve and a jet hole. The key point of its structure is that a filter screen is fixed on the surface of the water inlet end of the jet hole. This patent has little modification to the existing water meter, effectively prevents the blockage of the jet hole and reduces the failure rate under the condition of almost no increase in cost, but in the actual application of the project, especially in the construction of pre...

AI Technical Summary

Problems solved by technology

This patent has little modification to the existing water meter, effectively prevents the blockage of the jet hole and reduces the failure rate under the condition of almost no increase in cost, but in the actual application of the project, especially in the construction of precipitation, it cannot play a role in the water meter. The maximum degree of protection, in the case of more gravel, it is still easy to cause blockage of the water meter

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