Drainage pipeline noise detection chamber and its detection method

Abstract

A drainpipe noise detection chamber is composed of a chamber body, a catchment pool, a water supply and drainage system and a test equipment. The chamber body adopts a steel frame structure and has an upper layer and a lower layer; the floor, the wall structure body as well as the windows and doors are made of insulation materials; the catchment pool is arranged under the first layer; the water supply and drainage system is arranged in the chamber; during detection, a computer, a sound level meter and a transducer are arranged at each test point based on requirements so as to accurately detect the noise in the pipes and fittings. After the detection chamber is established, the background noise is lower than 25dB(A); the detection chamber can complete drainage noise test for 4 standpipes at the same time, and can achieve unmanned operation in the chamber during noise detection so as to avoid man-made disturbance in the noise test. The establishment of the detection chamber provides a test environment for the noise contrast of various pipe fittings; and the noise detection method is simple and practical, providing a platform for the development of low-noise tube drainage pipes.

Description

1. Technical field: [0001] The invention provides a drainage pipeline noise detection room and its detection method, which is applicable to the measurement of various gravity flow drainage system noises in civil buildings, such as sewage and wastewater drainage systems, gravity flow rainwater drainage systems, etc., and belongs to the drainage pipeline noise detection technology field. 2. Background technology [0002] At present, the measurement of drainage pipe noise in European countries adopts the current European standard. The test conditions, devices and methods proposed in this standard are: set up two adjacent laboratories to measure airborne sound transmission and structural sound transmission at the same time. The installation holes are reserved on the ceiling and the floor, and the drainage pipe is composed of a standpipe, a tee outside the test chamber and a tee inside the test chamber, and the openings of the two tees are sealed. The distance from the outside o...

AI Technical Summary

Problems solved by technology

The microphone is 2cm away from the outer wall of the pipe. In order to isolate the environmental noise as much as possible, a 50mm thick ultra-fine glass wool tube is placed on the outer wall of the drain pipe at 500mm above and below the place where the microphone is placed, mainly to test the water flow noise of the drain pipe outside the pipe wall. Its shortcomings It is the sanitary ware, pipe fittings, standpipes and outlet pipes in the residential bathroom that do not match the actual noise generated by the sound transmission through the air when the water flows through it.

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