Mining ventilation duct

What is mining ventilation duct?

Mine air duct is a flexible pipe that guides air flow in a certain direction.

Commonly used gram weight of ventilation tube PVC fabric:

120gsm, 550gsm and custom

Common weave number:

150D, 1000D*1000D/500D*500D/300*500D/200*300D

Common parameter

1000 * 1000 d, 28 * 26

Max 5.1

1000 * 1000 d, 18 * 18

Max 5.1

1000 * 1000 d, 23 * 23

Max 5.1

500 * 500 d, 18 * 17

Max 5.1

characteristic

The air duct fabric is divided into positive pressure and negative pressure. The positive pressure adopts the heat sealing integral one-time forming process, and the longitudinal seam is seamless. It has the characteristics of flame retardant, antistatic, small wind resistance, low air leakage rate and high strength.

It is divided into the first generation of rubber cloth stitched air duct, the second generation of plastic thermal sealing stitched air duct and the third generation of seamless air duct.

The new generation (the third generation) of mine air duct adopts the integral one-time forming process of seamless air duct, which is characterized by no seams in the warp and weft direction of the air duct body, can withstand ultra-high wind pressure, the maximum pressure can reach 10000Pa; High security; Wear and scratch resistance; Small wind resistance, long air supply distance and other advantages. The negative pressure is made of seamless billet with carbon coil spring steel wire, using advanced thermal bonding technology. It has good suction effect, easy to turn, convenient transportation and storage (folding), long service life and so on.

use

Flexible pipe used in coal mine, tunnel, subway engineering, underground local guide air flow along a certain direction

classification

Mine positive pressure air duct, mine negative pressure air duct; Mine three-way air duct

Variety material

According to coated cloth material, air ducts are divided into rubber coated cloth air duct, plastic coated cloth air duct and rubber and plastic coated cloth air duct. With antistatic, resistance.

Mark packaging storage and transportation

1. Compress the air duct to less than 700mm in length along the axial direction, fix it in 3 ~ 4 places with rope or cloth strips, and then pack it with materials with good wear resistance.

2, the air duct in the process of transportation, prevent mechanical impact and friction, avoid the sun, rain.

3, the product should be stored in a well-ventilated warehouse, the code should not be too high, so as not to affect the quality of use, used mine air duct, should be washed cool dry, and then folded storage, prohibited and harmful to the quality of rubber and plastic material contact, avoid direct sunlight, rain, warehouse storage temperature should be between -15℃ ~ 35℃, relative temperature between 45-75%, And 1m away from the heat source.

4, the product in the specified transportation and storage conditions, since the production date, storage period of 1 years, its flame retardant, antistatic property in line with the provisions of this standard.

5, mine air duct should be selected according to the requirements of roadway and fan air volume, as well as elbow, tee and other special-shaped specifications, pay attention to the direction of air flow when connecting.

6, in the roadway should be hung up, so as to be flat and straight, tension hanging, every ring will be hung, see bad will be made up, turn slowly, eliminate water, to reduce resistance. (Repair method: wash and dry the damaged area, and treat it with glue)

Installation specification

The ventilator is responsible for the installation, transportation, maintenance and demolition of the ventilator in the area under his jurisdiction. Timely recovery of unused or damaged air ducts into the well, and timely repair of damaged air ducts up and down the well.

2, and must bring enough necessary equipment and materials, must be familiar with their own area of driving face conditions, such as duct diameter, length, roadway driving speed or through date, etc.

The air duct hanging should be flat, straight, tight and stable to avoid car cut and gun collapse. It must be hung whenever the ring is met.

Strict interface between air ducts is required. The rubber air duct can be used as a double reverse side joint or a three-ring joint.

When using glial air duct, there should be an iron duct transition between the local fan and the glial air duct. The joint of the local fan and the iron duct should be added with washers and tight screws; The joint of iron duct and glial duct should be tightened with iron wire.

The diameter of a column of air ducts should be consistent; If diameters are different, have transition joints.

The distance between the end of the air duct and the working face shall be implemented according to the regulations of each mining bureau, but sufficient air volume must be ensured on the working face.

often check the underground air duct, if there is a break to repair at any time, so that there is no air leakage.

The air duct should set a bend or slow turn at the corner, and is not allowed to turn dead. We need a tee at the bifurcation.

When inclined alley and shaft are driven, the joint and binding of air duct should be particularly firm.

When replacing the air duct, do not stop the local fan at will. When it is necessary to stop, contact the team leader and the driver at the driving face. When the amount of gas gushing in the roadway is large, the working face personnel must be withdrawn to a safe place before replacing the air duct.

After the tunneling is completed, all the air ducts should be removed in time under the command of the ventilation area. The removed duct should be loaded and transported to the well for washing, drying and repairing.

When removing the air duct, it should be removed from the inside out. When removing the single head tunnel air duct, the local fan is not allowed to stop.

Attention should be paid to prevent the mining car from hitting, squeezing and cutting the air duct in operation.

15, trans-belt conveyor, scraper conveyor operation, must first contact with the conveyor driver, if necessary can suspend the conveyor operation, to ensure the safety of operation.

16, the high top of the roadway operation to set up a bench, work to stand; When the air duct is hung in the roadway where the electric locomotive runs, safety warning should be set up to prevent being cut or hit by the trolley, and attention should be paid to preventing electric shock of the overhead line.

When the extraction ventilation mode is used, the air duct can be rigid air duct and rubber or plastic retractable air duct with steel wire skeleton. Plastic or rubber air ducts must have anti-static and flame retardant safety properties.

18, the installation of steel wire frame duct, in the process of loading and unloading should pay attention to light, do not be radial extrusion and sharp debris collision, so as to avoid deformation and damage.

When connecting the air duct with the quick joint soft belt, the end rings of the two sections of the air duct should be aligned, closed and the cloak cloth put up, and then the two ends of the ring should be tightened with the quick joint soft belt. The joint soft belt tightening force should be appropriate, with no air leakage and no pulling off, and the hand position of the joint soft belt should be downward on the side of the air duct.

When connecting the air duct at the end of the air duct (inlet), the air duct should be hung on the steel strand first, and then connected to the positive joint, so as to avoid bending and folding of the air duct.

The sharp corner of the air duct must be connected with a hard curved elbow.

When dealing with the water in the air duct, when the length of the air duct exceeds 500 meters, the soft belt of the quick joint can be unlocked directly for water discharge; When dealing with water in the air duct within 500 meters, the local fan safety window must be opened first, and then the joint can be opened for water discharge.

When extraction or mixed ventilation is adopted, the distance between the outlet or inlet of the duct and the working face and the length of the overlapping section between the pressed into the duct and the extracted duct should conform to the provisions of the mine operating regulations.

Maintenance specification

After the air duct is on the well, it should be washed and dried first, to check the damage and durability of the air duct, and then treated separately according to the inspection.

When repairing the air duct, the glue of the air duct should be prepared according to the requirements. According to the size of the break cut stitching, stitching with round as the best; Patch welt should be 20 mm larger than the size of the break; In order to prevent warping after stitching, the stitching edge should be cut into an inclined plane; Patch and break should be brushed to reveal the glue air duct color, dry to be coated with glue glue for bonding, patch bonding after the application of wood hammer compaction, so that the adhesion is tight, to ensure no air leakage; The duct should be coated with talcum powder. For large lacerations of more than 100 mm, thread must be sewn before adhesive.

The ring on the air duct should be complete, the distance between the ring should ensure that the air duct is hung flat and straight, and the iron rings at both ends should be sewn firmly. If you need to lengthen the air duct, the width of the flange bonding between the air duct is generally 200 mm.

The repaired air duct should be properly preserved, and the stored air duct should be dried once every quarter.

28, the production of tee, elbow and transition section, according to the shape and diameter of the air duct, should pay attention to the straight. The length of the transition joint shall not be less than 2m.

When welding the air duct ring, it should be carried out according to the relevant regulations of the welder. The ring should be welded firmly, and should be flattened and rounded.

Wear a mask when drying, washing and cleaning the air duct. The air duct must be able to stick after drying or blowing dry.

31, if there is a serious bad old duct, really can not be used again down the well, the duct should be cut lengthwise, can be made into a tarp to cover some equipment and new duct, so as to use waste, energy saving and environmental protection.

Pay attention to safety when loading and unloading air ducts. Hang them in the order of hanging buttons.

When repairing the air duct, an electric hair dryer should be prepared to dry the local damage of the mine air duct, and a sewing machine and repair tools should be prepared, as well as professional air duct glue.

Anhui DERVINYL New Material Technology Co., LTD

We are China's main PVC light box cloth manufacturers, but also PVC film, PVC tarpaulin manufacturers, with high quality professional production equipment, the production of PVC digital printing materials. We have 60,000 square meters of production site, registered capital of 25 million US dollars, 3 calender production lines, 3 sets of coating equipment, 5 laminating machines, 25 engineering and technical personnel, and 450 production personnel.

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Based on 20 years of production and sales experience, Anhui Yan New Material Technology Co., Ltd. adhere to the customer first, service first purpose.

1. Using high quality PVC new material, environmental protection plasticizer, high strength yarn, do not use any raw materials that do not meet customer requirements

2. Perfect regular maintenance mechanism of machinery and equipment, and regular elimination mechanism of defective parts

3. Strict product inspection, the implementation of 24-hour real-time product inspection, defective products never leave the factory

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