CN87200061U

CN87200061U - Low noise local ventilator

Info

Publication number: CN87200061U
Application number: CN 87200061
Authority: CN
Inventors: 潘广钊; 商玉芬
Original assignee: NANFANG COAL MACHINERY PLANT PINGXIANG JIANGXI PROV
Current assignee: NANFANG COAL MACHINERY PLANT PINGXIANG JIANGXI PROV
Priority date: 1987-01-08
Filing date: 1987-01-08
Publication date: 1988-03-23

Abstract

The utility model relates to a low noise local ventilator which is used for the local ventilation of the mine underground tunnel. The low noise local ventilator adopts a muffling measure on the basis of the ventilator body structure, and the past method that the inlet end and the outlet end of the ventilator are respectively provided with a section of the muffler for reducing the noise is changed. Through the improvement, the noise is made to descent from three to twenty decibels, and the air-current efficiency only descents from 2% to 8%. The length of the complete machine is similar to the original design, and the external-air cylinder is simplified to be a detachable structure with a split type or a bush type to replace and maintain the muffling material.

Description

Low noise local ventilator

The utility model belongs to the improvement of booster.Be mainly used in the local ventilation of mine underworkings, can in the mine that gas or coal-dust explosibility danger are arranged, use safely.

The present employed booster of mine, air pressure efficient is low, energy waste is big, especially noise height, do not satisfy the requirement of " industrial enterprise's noise sanitary standard ", it is healthy to have had a strong impact on the workman, often influences down-hole transportation signal because of noise is big and communication is working properly carries out, and causes the fortuitous casualty accident.

In order to reduce the noise of booster, all adopt the method for respectively adorning one section silencing apparatus at ventilator inlet/outlet end in the past.The booster of this structure, though noise descends to some extent, air-flow efficient also decreases a lot, complete machine length is increased, and silencing apparatus costs an arm and a leg.Silencing apparatus is non-removable welded structure in addition, in case muffler material lost efficacy or damaged, just can't change, and can only scrap by whole silencing apparatus.So this booster that reduces noise is difficult to be promoted the use of in actual applications.

For making booster reach unlikely again oversize, the purpose that dismounting is easy to maintenance of the low fuselage length of noise, therefore the utility model proposes the method for on the ventilator body structure, taking noise countermeasure.A kind of efficient height, in light weight, stable performance, use low noise booster easy to maintenance are provided thus.

Invention main points of the present utility model are: in order to reduce the noise of booster, need on the lengthening position of former rectifier, process and have the Kong Qun that diameter is 10 millimeters of φ 2～φ, and fill out within it with muffler material and form noise elimination core 2; And then the inwall installing that makes air intake tube 3, wind outlet barrel 9 and the air duct 5 of booster is porose group a muffler plate; Again its outside applying with silencing plate 10 so that absorb acoustic energy; Last outside the outermost end of silencing plate 10 is loaded onto air duct 11.Outer air duct 11 can be made subdivision type or suit type demountable structure, so that change muffler material.

The muffler material of noise elimination core 2 and silencing plate 10 can be foamed plastics or glass wool.

The low noise booster is through test, and technical performance all reaches usage requirement, and it has following advantage:

1. noise is low: under the situation of laboratory test optimal working point, noise is 82.5 decibels.The preliminary requirement of satisfying " industrial enterprise's noise sanitary standard ".

2. air-flow efficient height: reach 86.3% during air-flow efficient optimal working point, exceed 10%, exceed 15% than 70% of JBT series and can save a large amount of electric energy than 75% of YBT standard.

3. complete machine length only is in 1.5 meters, and is in light weight, be convenient to down-hole carrying.

4. outer air duct is subdivision type and suit type demountable structure, make change muffler material easily, be convenient to Maintenance and Repair.

Description of drawings:

1. low noise booster structural representation

2. the sectional drawing of the outer air duct of subdivision type

3. the sectional drawing of the outer air duct of suit type

The utility model is described in further detail below with reference to accompanying drawing:

Sequence number is among Fig. 1: rectifier 1, noise elimination core 2, air intake tube 3, impeller 4, air duct 5, rear guide vane 6, motor 7, terminal box 8, wind outlet barrel 9, silencing plate 10, outer air duct 11.

With reference to Fig. 1: it is that 10 millimeters of φ 2～φ, pitch-row are that 5～20 millimeters aperture is as muffler plate that the inwall of air intake tube 3, wind outlet barrel 9 and the air duct 5 of low noise booster is processed into diameter, its outside applying with silencing plate 10, the material of silencing plate 10 can adopt foamed plastics or glass wool again.In order to reduce the noise of booster, need on the lengthening position of former rectifier, to process equally to have the Kong Qun that diameter is 10 millimeters of φ 2～φ, and fill out within it with muffler material and form noise elimination core 2.Muffler material also adopts foamed plastics or glass wool.

With reference to Fig. 2 and Fig. 3: figure is two kinds of demountable structures that different types is subdivision type and suit type of the outer air duct of low noise booster.This kind structure is more convenient than non-removable welded structure maintenance, can change soon when in a single day muffler material loses efficacy or damage.

Claims

1, a kind of low noise booster that is used for mine underworkings local ventilation, its structure is made up of rectifier 1, air intake tube 3, impeller 4, air duct 5, rear guide vane 6, motor 7, terminal box 8, wind outlet barrel 9, it is characterized in that:

A, on the lengthening position of former rectifier the processing group of portalling, in fill out with muffler material and form noise elimination core 2;

The inwall into and out of air duct and air duct of b, this booster is the muffler plate that is processed into porose group;

C, apply in the outside into and out of air duct and air duct of low noise booster in order to absorb the silencing plate 10 of acoustic energy;

D, outside the outermost end of silencing plate 10 is equipped with air duct 11.

2, by the described low noise booster of claim 1, it is characterized in that: the muffler material of noise elimination core 2 and silencing plate 10 is a foamed plastics.

3, by the described low noise booster of claim 1, it is characterized in that: the muffler material of noise elimination core 2 and silencing plate 10 is a glass wool.

4, by the described low noise booster of claim 1, it is characterized in that: outer air duct 11 is made subdivision type or suit type demountable structure, so that change muffler material.