500 mining positive pressure negative pressure air duct, positive pressure coated cloth air duct

Description :

　　five hundredMining positive pressure negative pressure air duct, positive pressure coated cloth air duct

　　five hundredMining positive and negative pressure air duct, positive pressure air duct, Shanxi Lishi Mining positive and negative pressure air duct

　　What material is the positive and negative pressure air duct made of? There are two types of materials, one is fiberglass and the other is coated cloth. Shandong Yucheng carefully produces coated cloth positive and negative pressure air ducts, with a diameter of 500 for mining negative pressure air ducts, coal mine specific positive and negative pressure air ducts, and ventilation fan specific positive and negative pressure air ducts.

　　The use of coal mine specific positive and negative pressure air ducts: for extraction oriented ventilation in coal mines, tunnels, subway engineering, ships, and local underground areas;

　　Classification of positive and negative pressure air ducts: conventional negative pressure air ducts, zipper negative pressure air ducts;

　　The variety and material of positive and negative pressure air ducts: Air ducts are divided into rubber coated cloth, plastic coated cloth, and rubber coated cloth according to the coating material. They are formed by processing the cylinder blank with carbon spiral spring steel wire. Has anti-static and flame retardant properties;

　　Production execution standard for positive and negative pressure air ducts: MT165-2007 standard; The "Rubber or Plastic Coated Fabric Ducts" specifies the classification, structure, technical requirements, test methods, inspection rules, packaging, labeling, transportation, and storage of rubber or plastic coated fabric ducts

　　Mining air ducts are divided into positive pressure ducts and negative pressure ducts. The positive pressure air duct is 10M per section and there is no skeleton in the middle; The negative pressure air duct is composed of countless steel rings, also known as the skeleton air duct.

　　The positive pressure air duct vent blows air outward, while the negative pressure air duct vent sucks air inward.

　　With the increase of comprehensive excavation working faces, hybrid ventilation and dust removal technology has been widely applied. In order to meet the requirements of extraction ventilation and fully utilize the advantages of flexible mining air ducts, flexible mining air ducts with rigid skeletons have been developed and applied, that is, steel wire rings or spiral steel wire rings are added at regular intervals in the flexible mining air ducts. This type of air duct can withstand a certain negative pressure, can be used for extraction ventilation, and has the characteristic of being extendable, which is more convenient to use than iron air ducts.

　　The diameter of the mining air duct should be determined based on the ventilation distance and the air volume passing through the duct. It is necessary to ensure that the supply air volume of the local ventilation fan can meet the requirements of the working face when the maximum length of the air duct is reached.

　　Generally, when the ventilation length is within 200m, it is advisable to use a mining air duct with a diameter of 400mm; When the ventilation length is between 200-500m, it is advisable to use a mining air duct with a diameter of 500mm; When the ventilation length is between 500 and 1000m, it is advisable to use a mining air duct with a diameter of 600mm; When the ventilation length is over 1000m, it is advisable to use a mining air duct with a diameter of 600mm or more.

　　Packaging, storage and transportation of positive and negative pressure air ducts:

　　1. Compress the negative pressure air duct axially to a length of less than 700mm, fix it with ropes or cloth strips at 3-4 places, and then package it with wear-resistant materials;

　　2. During transportation, negative pressure air ducts should be protected from mechanical impact and friction, as well as from direct sunlight and rain;

　　3. Negative pressure air ducts should be stored in a well ventilated warehouse, and should not be placed too high to avoid affecting the quality of use. Used air ducts should be washed and dried first, and then folded for storage. Contact with substances that damage the quality of rubber and plastic is prohibited, and direct sunlight and rain should be avoided. The storage temperature should be between -15 ℃ and 35 ℃, with a relative temperature between 45-75%, and at a distance of 1 meter from the heat source;

　　4. Under the specified transportation and storage conditions, the negative pressure air duct meets the requirements for flame retardancy and anti-static properties within one year from the date of production;

　　What is the material of the air duct? How many meters per section? How much does it cost per section? How many steel bars are there in a section? How thick is the steel bar inside? For specific information on procurement needs, please call my person in charge.

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• 500 mining positive pressure negative pressure air duct