Air pressure fluctuation test method and apparatus for drainage system

Abstract

Disclosed are a drainage system air pressure fluctuation test method and a device thereof; the device is composed of a water tank, a water supply and drainage pipe system and a test instrument; the water tank is arranged at a position which is more than 5 meters high; the water supply and drainage pipe system is composed of a water tank outlet pipe, a valve, a horizontal drainage pipe, a tee joint, a reducing elbow, a 45-degree elbow, a ventilation pipe, a horizontal branch pipe, a vertical drainage pipe, a horizontal discharging pipe and a triangle plastic plate; and the test instrument comprises a pressure sensor and a computer. The test method comprises the following steps: supplying the water tank with water, recording the water level calibration number of a glass tube outside the water tank, starting up the computer, opening the valve at an angle of 60 degrees and discharging water for 20 seconds; the closing the valve, recording the water level decrease value of the water tank, and calculating the average flow during the water discharging period based on data; repeating the test for three times for each flow, removing the data with irregular pressure fluctuation from the beginning of water discharging to the five seconds before the end of the discharging; and then taking the average value so as to get the pressure extreme value in the operating condition. The test method and the device are easy to use and operate, and provide a technical platform for improving the drainage flow pattern, reducing the air pressure fluctuation inside the standpipes as well as improving the water passing capacity of the water drainage system.

Description

1. Technical field: [0001] The invention provides a drainage system air pressure fluctuation testing method and a device thereof, which are suitable for measuring the air pressure fluctuation in a vertical pipe of the drainage system. It belongs to the technical field of water supply and drainage. 2. Background technology [0002] The building drainage system plays an important role in the realization of building functions. Ensuring unobstructed drainage, preventing water seal damage and maintaining the quality of the living environment should be the basic principles of drainage system design. In a drainage system, as long as one water seal is damaged, the balance of the entire drainage system will be broken, and the gas in the drainage pipe will overflow into the room. The water seal depth of the water trap of sanitary ware shall generally not be less than 50mm, and the pressure fluctuation value in the drainage pipe shall not exceed ±40mm water column (H 2 O) to ensure ...

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Problems solved by technology

Exceeding this value may result in positive pressure spray and negative pressure suction

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