The 800mm soft hair dryer can withstand the maximum wind pressure of 8000Pa. According to the relevant information of the platform: the soft air duct adopts a heat-sealed integral single molding process, without longitudinal seams. It has the characteristics of flame retardant, anti-static, low wind resistance, low air leakage rate and high rate. It is mainly used for local fans in coal mines, tunnels and underground mines. The fan performs positive pressure ventilation, has longitudinal and latitudinal tear resistance, can withstand a wind pressure of 8000 Pa, and meets the air supply requirements of large wind turbines. .
Classification of air ducts
Mining air ducts are divided into flexible air ducts and rigid metal air ducts according to different materials. Flexible air ducts are made of leather, plasticpolished and canvas. , rubber, etc. The rigid metal hair dryer is made of iron, steel, aluminum, etc. Among them, iron air ducts are divided into ordinary iron air ducts and anti-return iron air ducts.
The iron air duct is therefore a rigid metal air duct. The function of the air duct is to connect ventilation equipment to extract and exhaust air and guide the air flow in a certain direction. pipe currently used in coal mines or tunnels. It is the most commonly used air guiding and air supply device in narrow tunnels and other places.
Purpose: Used for pressure guided ventilation in coal mines, tunnels, subway projects and local underground areas; Category: Conventional positive pressure air guide, three-zipper type positive pressure air guide; track guide Air duct, conspecial-shaped air duct, automatic switching air duct, reflective air duct.
Variety and material: According to the covering material, the air duct is divided into pressure air positive pressure fabric rubber covered fabric positive pressure air duct and positive pressure fabric rubber covered air duct. They are anti-static and anti-random.
Production implementation standards: Standard number: 1. MT164-2007. Coal mining “coated fabric positive pressure air duct for cylinder”. 2. GB/T 9900-2008 “Rubber or plastic coated fabric air guides” specifies the classification, structure, technical requirements, test methods, inspection rules, packaging, marking and transporting rubber or plastic-coated fabric air guides. storage etc
Wind pressure resistance: after passing the wind pressure resistance test, the air guide should not cause the air duct to become detached, the upholstery fabric to tear, or the seams to open. The diameter expansion rate of the hair dryer should not be more than 3.0%. The air guide duct must have appropriate specifications according to the tunnel requirements and fan air volume, as well as special shape specifications such as elbows and tees. Pay attention to the direction of air flow when connecting.
Ventilation performance: The wind resistance value of a 600mm diameter hair dryer per 100 meters is less than 54N·s/M and the air leakage rate per 100 meters is less than 5%.
Structure and specifications: 1 - End ring 2 - Lifting ring installation line 3 - Lifting ring 4 - Allowable error of inverted project size (mm) Dryer diameter ( mm) 300 400 450 500 600 800 1000 0~ ± 3 Dryer length (mm) 5 10 200~±100 Note: 1. Dryer size or special shape specifications of reducing ducts, elbows, tees and transition joints can be manufactured according to buyer's requirements.
2. If there are special requirements for the specifications of metal accessories such as lifting rings and hair dryer end rings, the specifications must be agreed by both parties.
3. Two hair dryersThe length L of the end plus the inverted edge is 150-200mm.
Air duct ventilation performance test report Air duct diameter, mm Wind resistance per 100 meters (N·S 2 /M 8) Air leakage rate per 100 meters, % 300 ≤1728.0 ≤5.0 400 ≤410.0 ≤5.0 500 ≤134.0 ≤ 5.0 600 ≤54.0 ≤5.0 800 ≤13.0 ≤5.0 Usage: Used for extractable guided ventilation in coal mines, tunnels, subway projects, ships and underground areas
Classification: Conventional negative pressure air guide, zipper type negative pressure air guide Pressure guide air duct
Variety and material: According to the covering material, the air duct air is divided into rubber-coated fabric, plastic-coated fabric and rubber-plastic-coated fabric. The barrel blank is processed with carbon spiral spring steel wire. Anti-static and heat resistant
Production execution standard: Standard number: MT165-2007 Huai Standard. “Rubber or plastic coated fabric air guides” stipulates the classification, structure, technical requirements, testing methods, inspection rules, packaging, marking, transportation and storage of air guides made of rubber or plastic coated fabric.
Wind pressure resistance: After passing the suction pressure test, the air guide should not cause flattening, decconnection, tearing of the covering fabric or opening of the seams. The negative pressure air guide should have appropriate specifications according to the requirements of the tunnel and the air volume of the fan, and pay attention to the air flow direction when connecting.
Ventilation performance: the negative pressure resistance of a hair dryer with a diameter of 600 mm (pa) ≥ 3140. The shrinkage rate of the diameter of the hair dryer is greater than 1%.
Structure and specifications:
Negative pressure resistance performance: When the air duct is subjected to negative pressure resistance test, its value should conform to the following table: Air duct diameter (mm) Steel wire spacing (mm) Negative pressure resistance (pa) 600 150 ≥3140 600 100 ≥4900 Dryer diameter shrinkage greater than 1%