CN1311372A - Method for producing seamless wind guide tube - Google Patents

Abstract

A manufacturing method of seamless air guide duct is to make a large air volume and high pressure air duct with plastic coated on its two surface used for the underground working area of the mine or tunnel. The preparing method is to put the woven circular cloth stock of chemial fibre on the bush of special model of palastic coating to coat uniformly the layers with PVC plastic as a main high polymer material on the outer and inner surfaces of the circular dust stock under certain temperature by plasticizing granules. The dust made by this method is high strength, seamless, small wind blockage and with double times of wind pressure standing capacity as compared with prior art ones.

Description

The manufacture method of seam-free air-duct

The present invention relates to a kind of manufacture method that is used for the seam-free air-duct of down-hole ventilations such as mine, Tunnel Engineering, particularly be suitable for the manufacture method of the seam-free air-duct of remote, the big air quantity ventilation in down-hole.

At present, China is used for that ventilating duct that the down-hole, mine ventilates mostly is the rubber leather or the plastics leather is made, and on manufacture method, adopt calendering formation, be generally the plain cloth shape, when making air duct, must get and vertically sew up or bonding and splicing, therefore, there is one or several longitudinal joint inevitably in the ventilating duct of making, and these longitudinal joints are as using bonding way, then easily peel off, have influence on intensity because of the coating of rubber leather or plastics leather; As the ventilating duct air leak rate of air curtain being increased with sewing up mode, make the pinprick that is brought, also have a strong impact on ventilating duct intensity simultaneously, therefore, longitudinal joint is the strength weak link of whole piece ventilating duct, its existence has determined that the intensity of ventilating duct is low.Simultaneously, the product that calendering technology is made also exists coating easily to peel off, and service life is short.Moreover, China recent years, along with the raising of coal mine machinery production degree, developed New-type local blower, apply as convection rotary type portable blower, diagonal flow type portable blower etc., also more and more higher to its ventilating duct technological requirement that matches, require ventilating duct diameter phi 800-φ 1000mm, wind supply quantity is 500 cubic metres/minute, pressure 5000-5500Pa, (existing originally ventilating duct generally only reaches about 3000Pa), it is remote that air supplying distance reaches 1500-2200 rice.Because existing air duct quality index does not reach the supporting requirement of present import secondary fan, used the conventional air duct of introduction blower fan adapted as 96 years in table mountain mineral bureau, ventilating duct occurs and tore phenomenon, have a strong impact on down-hole ventilation engineering.

At the present conventional ventilating duct of China, no matter all can not match with its corresponding New-type local blower at aspects such as pressure, air quantity, diameters, the purpose of this invention is to provide a kind ofly have withstand voltage height, wind supply quantity is big, air leak rate of air curtain is little, the manufacture method of the seam-free air-duct of the remote down-hole ventilation of long service life.

The main raw material of seam-free air-duct of the present invention, form by Corvic, plasticizer, heat stabilizer, antistatic additive, fire retardant, lubricant, pigment, filler etc., it is characterized in that technical recipe by weight percent ratio be: base-material Corvic 20-30%; Plasticizer (as dibutyl ester etc.) 30-40%; Heat stabilizer 1-3%; Antistatic additive (SH-105) 0.8-2%; Fire retardant 7-10%; Lubricant 0.5-1.5%; Pigment 1-2%; Filler (calcium carbonate) 15-24%.Its manufacturing step: 1. granulation: with the Corvic is base-material, adds auxiliary agents such as quantitative plasticizer, heat stabilizer, antistatic additive, fire retardant, through kneading the stirring extruding pelletization, makes pellet; 2. the tube base is weaved: chemical fibre silk (yarn) weaves the circular cylinder base on special loom; 3. be coated with molded: earlier with pellet preheating under 90-110 ℃ temperature, the tube of weaving is bad, place on the mouth mould of the particular manufacturing craft of using plastic-coated, the head temperature of mouth mould and extruder is controlled at 160-190 ℃, the pellet of plasticizing evenly applies the macromolecular material of one deck based on the PVC plastics on inside and outside two sides of circular cylinder base, through the shower water cooling, the arrangement check is put in storage then.

Adopt advantageous effect of the present invention as follows:

One, bulk strength and withstand voltage height.The present invention adopts the disposable plastic spraying in innner and outer sides at chemical fibre silk (yarn) tube base, therefore, the bulk strength of air duct and coating adhesive strength height, anti-blast is big, reaches 6000-6500Pa, and existing general air duct is about 3000Pa.Two, performance of ventilating is good.Tube of the present invention base adopts high-intensity chemical fibre silk (yarn) to weave out on special loom, air duct does not vertically have seam, windage is little, air leak rate of air curtain is low, effective of wind amount rate up to more than 91%, air quantity is big.Three, technical indicators such as the sheet resistance of the high withstand voltage two-sided plastic-coated seam-free air-duct of the present invention and fire resistance meet Ministry of Coal Industry's required standard, applying of this product, solve the current novel high-power secondary fan that is promoting of China and do not had desirable supporting ventilating duct problem, improve the security reliability of down-hole, mine ventilation, guaranteed mine and miner's security of the lives and property.

Fig. 1 is a process chart of the present invention.

Among the figure: the preparation of 1-industrial chemicals; The 2-granulation; 3-chemical fibre silk (yarn); 4-weaves a base; 5-is coated with molded; 6-water drenches cooling; Put in order behind the 7-; 8-examination and test of products warehouse-in.

The manufacture method most preferred embodiment of seam-free air-duct of the present invention is as follows:

Taking by weighing Corvic is 27.1%; Plasticizer dibutyl ester 36.3%; Heat stabilizer lead sulfate tribasic 2%; Antistatic additive SH-105 is 1.1%; Fire retardant antimony trioxide 9.6%; Lubricant stearic acid is 0.8%; The pigment acetylene carbon black is 1.4%; Filler-calcium carbonate 21.7%; Manufacturing step: the 1. batching granulation of kneading: with above industrial chemicals, per distribution ratio by weight mixes stabilizing agents such as fire retardant such as antimony trioxide and lead sulfate tribasic earlier, and pouring an amount of dibutyl ester plasticizer into, make slurry through stirring stand-by; Again Corvic is added the kneading machine preheating and is stirred to drying regime for 90-110 ℃, add plasticizer, slurry and auxiliary agent again, treat the abundant swelling of resin-oatmeal after, add filler-calcium carbonate again, promptly can be made into pellet after stirring; 2. the tube base is weaved: chemical fibre silk (yarn) weaves the circular cylinder base on special loom; 3. be coated with molded: earlier with pellet preheating under 90-110 ℃ temperature, to weave the tube base, place on the mouth mould of the particular manufacturing craft of using plastic-coated, the head temperature of mouth mould and extruder is controlled at 160-190 ℃, the pellet of plasticizing evenly applies the macromolecular material of one deck based on the PVC plastics on inside and outside two sides of circular cylinder base, through the shower water cooling, the arrangement check is put in storage then.

Claims (3)

1, a kind of manufacture method that is used for the seam-free air-duct of down-hole construction exhaust ventilations such as mine, Tunnel Engineering, main raw material is made up of Corvic, plasticizer, heat stabilizer, antistatic additive, fire retardant, lubricant, pigment, filler etc., and it is characterized in that: a technical recipe example by weight percentage is: Corvic 20-30%; Plasticizer (as dibutyl ester etc.) 30-40%; Heat stabilizer 1-3%; Antistatic additive (SH-105) 0.8-2%; Fire retardant 7-10%; Lubricant 0.5-1.5%; Pigment 1-2%; Filler (calcium carbonate) 15-24%.Its manufacturing step of b: 1. granulation: with the Corvic is base-material, adds auxiliary agents such as an amount of plasticizer, heat stabilizer, antistatic additive, fire retardant, lubricant, stirs extruding pelletization at a certain temperature through kneading; 2. the tube base is weaved: chemical fibre silk (yarn) weaves the circular cylinder base on special loom; 3. be coated with molded: the tube base that will weave places the particular manufacturing craft that is used for plastic-coated, and the control uniform temperature evenly is coated with the macromolecular material of one deck based on the PVC plastics on the two sides of circular cylinder base.

2, by the manufacture method of the described seam-free air-duct of claim 1, it is characterized in that best weight percentage ratio is: Corvic is 27.1%; Antistatic additive SH-105 is 1.1%; The plasticizer dibutylester is 36.3%; Fire retardant is 9.6%; Stabilizing agent is 2%; Lubricant is 0.8%; Pigment is 1.4%; Pearl filler is 21.7%.

3, by the manufacture method of the described seam-free air-duct of claim 1, it is characterized in that the pellet preheat temperature is 90-110 ℃, tube base plastic-coated temperature is 150-190 ℃.

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