Zibo Cord hose Prevention of vibration and noise during installation: the prevention of vibration and noise during installation is a key point in the installation process. The prevention of vibration and noise of spiral air duct during installation is mainly from the following aspects: 1. The fan and spiral air duct are connected by hose, and the hose at the suction inlet of the fan shall be installed with appropriate tightness, Avoid noise and vibration caused by reducing the area of air inlet and outlet due to loose soft connection. 2. The spiral air duct shall be made, installed and connected with the components. The connection shall be tight to reduce the gap and avoid air leakage noise. 3 In order to prevent the spiral air duct from vibration, fixed supports shall be installed at the turning of each system spiral air duct and at the connection with the ventilator and the air outlet for shock absorption. 4 The vibration damping device shall be set according to the design requirements or construction specifications during fan installation. Air leakage rate test of spiral air duct After the installation of spiral air duct, air leakage rate test is required. According to the specifications, the air leakage rate test of spiral air duct adopts the combination of light leakage legality and quantitative air leakage rate test. The light leakage method is suitable for the tightness test of medium and low pressure systems; The air leakage rate test is suitable for sampling inspection of medium pressure system and full detection of high pressure system. Light leak detection of spiral air duct Light leak detection is a qualitative method to detect the tightness of the spiral air duct of the system by using the strong penetration of light to holes. The test method is to use a bulb with protective cover whose voltage is not higher than 36V and power is more than 100W in the spiral air duct on a certain length of spiral air duct in dark environment, and slowly move from one end of the spiral air duct to the other end. If light can be observed outside the spiral air duct during the test, it indicates that there is a leak point in the spiral air duct, and repair the leak point of the spiral air duct. Cord hose Where can I find it? The light leak detection method of the low-pressure system adopts the method of subsection detection and summary analysis. The spiral air duct of the tested system is not allowed to have multiple obvious light leaks in the form of slits. The spiral air duct of the low-pressure system has no more than two light leak points every 10 meters, and the average joint of 100 meters is no more than 16; For every 10 joints of spiral air duct of medium pressure system, no more than 1 light leak point, and no more than 8 joints per 100 meters are qualified.

Many people don't know much about spiral tube. In fact wear-resisting Cord hose It is very extensive. Spiral air duct is mainly used to connect the two places for ventilation. Spiral air ducts (stainless steel and galvanized iron sheet) are widely used in the market. Spiral air duct market is generally divided into three categories according to material: galvanized spiral air duct, stainless steel spiral air duct and composite spiral air duct. Among them, the stainless steel air duct has good quality and strong applicability, but its price is high. The return air duct of purification system, central air conditioning ventilation duct, industrial air supply and exhaust duct, environmental protection system suction and exhaust duct, mine gas drainage duct, mine coating duct, etc. The spiral duct is first used for ventilation and cooling, which belongs to the category of air duct. It is named according to its purpose, but it can also be used in other places, even for drainage, drainage or as a container, which cannot be called a pipe. Named according to the structure, it should be called spiral grooved thin-walled tube, because it is mainly made of metal, also called spiral grooved metal tube. According to the material name, there may be several names: galvanized (any zinc) (galvanized) (iron), spiral pipe, stainless steel spiral pipe (stainless steel acid resistant steel), aluminum (aluminum) spiral pipe, or in order to distinguish from the existing acid resistant stainless steel pipe, Cord hose Where can I find it? It can be called ultra-thin stainless steel pipe, because it can use 0.3mm or even thinner to roll stainless steel strip.

Before construction, the technicians must be familiar with the drawings and relevant data carefully, and understand the technological process, working medium, pressure, temperature and other technical parameters as well as the materials, models and specifications of the materials and accessories used. The construction personnel must be fully familiar with the construction procedures, construction methods, quality standards, operating procedures and safety technical requirements, and strictly implement them during construction. Main materials used for making galvanized air duct, Zibo Cord hose It shall comply with the current national product standards and the enterprise standards of the manufacturer, and shall have the factory certificate and other relevant material certificates. All material accessories must be rechecked with the design and current national product standards, and shall have the factory certificate, material quality assurance and other relevant material certificates. Combined flange air duct is also called thin-walled steel plate flange air duct. It is an air duct connected by non profile steel and made of galvanized steel plate. Its connection form can be directly pressed by strips or steel plates or the air duct and flange can be integrally formed. This kind of air duct has advanced manufacturing technology, accurate blanking, low material consumption, stable product quality, many varieties, smooth contour lines, and air leakage rate far lower than the national standard, which is conducive to the production of ventilation ducts to be industrialized, large-scale, standardized and automated. It is a scientific and technological achievement project that has been vigorously promoted in China in recent years as one of the non blue air duct processes. The National Grand Theater project is to use this new process air duct. Common plate flange air duct 1 Fabrication of composite flange air duct Common mechanical equipment for fabrication of composite flange air duct include: rectangular air duct full-automatic production line, plasma automatic cutting machine, flange strip forming machine, hook code forming machine, conjoined flange forming machine, etc. The combined flange air duct is based on the air duct size given in the drawing, Cord hose Where can I find it? Fully automatic production line is used to produce coiled material with a common width of 1250mm, and the plate thickness is 0.5~1.2mm. When the large side of the air duct is less than or equal to 2m, the air duct is formed into TDC1 flange, and the standard pipe length is 1170mm; When the large side of the fabricated air duct is less than or equal to 2.5m, the air duct is formed into TDC2 flange, and the standard pipe length is 1250mm; When the large side of the fabricated air duct is more than 2.5m, the air duct is formed into an angle steel flange, and the standard pipe length is 1230mm

wear-resisting Cord hose 1. During the molding of rubber products, the cohesive force of the elastomer cannot be eliminated due to the large pressure pressing. During the molding and mold release, extremely unstable shrinkage (the shrinkage rate of rubber varies due to different rubber types) often occurs. It must take a period of time before it can be gentle and stable. Therefore, at the beginning of the design of a rubber product, no matter the formula or the mold, it is necessary to carefully calculate the matching. If not, it is easy to cause dimensional instability of the product, resulting in low product quality. 2. Rubber belongs to thermosetting elastomer, while plastic belongs to thermosetting elastomer. Due to different sulfide types, the temperature range of rubber molding and curing is quite different, even affected by climate change and indoor temperature and humidity. Therefore, the production conditions of rubber products need to be properly adjusted at any time. If not, there may be differences in product quality. 3. The rubber product is the rubber mixture made from rubber raw materials after mixing in the internal mixer as the raw material. The formula is designed according to the characteristics of the required rubber products during mixing, and the required product hardness is determined. The product is molded by the rubber plate vulcanizer. After the product is formed, flash processing shall be carried out to make the product surface smooth without burrs. 4. The aging test of rubber products belongs to the category of aging test. Rubber aging refers to the phenomenon that the performance and structure of rubber and products are changed due to the combined effect of internal and external factors in the process of processing, storage and use, thus losing their use value. Cord hose Where can I find it? It is characterized by cracking, tackiness, hardening, softening, chalking, discoloration, mildew, etc. The following conditions shall be met when the ball mill uses the rubber lining plate: 1. The hardness of the ground material. The iron base alloy is similar to the rubber lining plate for materials below medium hardness, and the rubber lining plate is superior for materials above medium hardness. 2. The temperature of rubber lining plate is generally 70 ℃ - 90 ℃, and it can reach 110-130 ℃ under special circumstances. The temperature should be lower during dry grinding. 3. Feed size. Generally, the ball mill shall be more than 20-25mm; For the autogenous mill, the feeding particle size can be larger because no steel ball is added.