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An air inlet muffler for a local ventilator

A ventilator and muffler technology, which is applied to components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve problems that affect the normal work of workers, physical and mental health, and hidden safety hazards, and achieve improved noise reduction effect, weight reduction, good middle and low frequency noise reduction effect

Active Publication Date: 2018-07-06
PINGAN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The noise is mainly concentrated in the middle and high frequency range, and the piercing screams have seriously affected the normal work and physical and mental health of the workers.
Sometimes even the sound of driving, mechanical operation and electric bell signal is covered up, which has certain potential safety hazards.

Method used

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  • An air inlet muffler for a local ventilator
  • An air inlet muffler for a local ventilator
  • An air inlet muffler for a local ventilator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, the present invention includes a current collector and a muffler made of plastic, the current collector is a cone-shaped cylindrical structure, the muffler is a straight cylinder, and the larger diameter end of the current collector is fixedly connected with the muffler , the collector includes a collector tube 8, a first support 9, a first conical tube 10, and a plastic suction deflector cap 11; The line position is fixed with a plastic suction diversion cap 11, and a first support 9 is provided between the collector tube 8 and the blister diversion cap 11; the first conical tube 10 and the collector tube 8 form a double-layer structure, which effectively increases the collection capacity. The sound insulation effect of the flow section; the muffler includes a first outer cylinder 12, a first inner cylinder 17, a second outer cylinder 19 and a first conical reflector 16, the first outer cylinder 12 is coaxially installed with the first inner cylinder 17, a...

Embodiment 2

[0029] Embodiment 2, the present invention is provided with two or more first arc-shaped reflectors 18 in the first tapered reflector 16 located between the outer end of the first inner cylinder 17 and the first cover plate 21, The first curved reflector 18 is curved. refer to Figure 1 to Figure 3 , and the rest are the same as the above-mentioned embodiment.

Embodiment 3

[0030] Embodiment 3, the first outer cylinder 12 and the outer cylinder sound-absorbing foam layer 13 of the present invention form an outer ring, the inner-tube outer layer sound-absorbing foam layer 14, the inner cylinder inner layer sound-absorbing foam layer 15 and the first inner cylinder 17 form an inner ring, The multi-ring structure can effectively divide the airflow and increase the noise reduction area; secondly, the side air inlet structure is adopted, and the second outer cylinder 19, the outer sound-absorbing foam layer 20 and the first cover plate 21 can effectively block the linear propagation of radiation noise; The first conical reflector 16 and the n first arc-shaped reflectors 18 evenly distributed along the surroundings prevent radiation noise from spreading outwards by reflecting sound waves. refer to Figure 1 to Figure 3 , and the rest are the same as the above-mentioned embodiment.

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Abstract

The invention discloses an air inlet silencer for a local ventilator, and mainly solves such technical problems as bigger weight, high noise and low efficiency of a traditional air inlet silencer. The air inlet silencer for the local ventilator is characterized by comprising a current collector and a silencer body; the current collector is a conical cylinder type structure; the silencer body takes the shape of a straight cylinder; the bigger-diameter end of the current collector is mutually matched and fixedly connected with the silencer body; the current collector comprises a current collecting cylinder (8), a first support (9), a first conical cylinder (10) and a plastic uptake guide cap (11); the silencer body comprises a first outer cylinder (12), a first inner cylinder (17), a second outer cylinder (19) and a first conical reflection plate (16); the first outer cylinder (12) and the first inner cylinder (17) are coaxially mounted; and the first outer cylinder (12) and the second outer cylinder (19) are fixedly connected through a first arc reflection plate (18). The air inlet silencer is mainly used for a ventilator air inlet, and realizes such performances as silence, sound insulation through reflection and vibration reduction.

Description

technical field [0001] The invention relates to a muffler for a fan, in particular to a muffler for an air inlet of a partial fan made of all plastic. Background technique [0002] At present, the ventilation system is an important part of mine mining and the basic guarantee for mine safety production. The function of local ventilators (hereinafter referred to as local fans) is to continuously transport fresh air to the underground working face during mine production. Provide personnel with breathing, dilute and eliminate various toxic and harmful gases and mineral dust underground, create a good working environment, and ensure the health and safety of underground workers. [0003] At present, all countries in the world are focusing on the general goal of saving energy and protecting the environment in the research of mine local ventilators. In terms of saving energy and improving efficiency, firstly, the use of advanced technology and equipment has improved the manufacturi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66
CPCF04D29/663F04D29/664
Inventor 肖亮娄炳炎张和义
Owner PINGAN ELECTRICAL
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