A noise reduction device for natural gas injection noise

Abstract

The invention discloses a natural gas injection noise reduction device, which comprises a main noise reduction pipe, intubation tube 1, intubation tube 2 and intubation tube 3, both ends of the main noise reduction tube are closed, and the inside of the main noise reduction tube is separated by a partition The first chamber and the second chamber are formed; the first chamber is inserted into the first chamber, the outer section of the first chamber is connected to the vent tube, and the length of the inner section is 1 / 2 of the length of the first chamber; The second tube is inserted into the partition, and the partition divides the cannula into two parts. The first part is located in the first chamber and its length is 1 / 4 of the length of the first chamber. The second part is in the second chamber and its length is 1 / 2 of the length of the second chamber; the third intubation tube is inserted into the second chamber, the outer section of the intubation tube three is connected to the atmosphere, and the length of the inner section is 1 / 4 of the length of the second chamber. The invention is simple in structure, light in weight, convenient to manufacture and easy to install, can quickly and effectively reduce the low-frequency noise of the sounding body, realize the effective control of the gas venting injection noise, and reduce the health impact on personnel.

Description

technical field [0001] The invention belongs to the field of occupational safety and health of natural gas transportation stations, and in particular relates to a special tool for preventing and reducing jet noise of venting pipelines during planned venting and emergency venting of natural gas, that is, a double expansion chamber noise reduction device. Background technique [0002] Noise pollution, together with air pollution, waste gas pollution, and water pollution, is called the four major pollutions in the world today. Noise is a kind of physical pollution, it directly acts on human senses, it is instant, has no after-effects, and will not accumulate gradually. When the noise reaches 50dB, people will feel uncomfortable, lack of concentration, difficulty in thinking, etc.; when the noise reaches 80dB, it will cause harm to human health; for people exposed to high-intensity noise for a long time For example, it may cause hearing loss or even deafness, resulting in certa...

AI Technical Summary

Problems solved by technology

Although during the propagation process, the noise intensity is reduced due to the increase of the propagation distance, the absorption of the material medium, the shielding of obstacles, etc., but the final result is still relatively serious.

The staff of the gas transmission station have been exposed to noise for a long time, which has brought harm to their physical and mental health. At the same time, it cannot meet the basic requirements of the country for environmental protection and damage the corporate image.

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