Chinese name: mbth: UV lamp abbreviation: UV lamp uses: product introduction, characteristics, name source, common specifications, use classification, scope of application, use conditions, parameter classification, installation matters, supporting components, service life, failure reasons, use taboos, etc. Product Description Features Ultraviolet lamp is a kind of gas discharge lamp, which can be divided into arc discharge and glow discharge. Arc discharge lamps are often used for ultraviolet curing. Its working principle is that a certain amount of high-purity mercury (mercury) is added into a vacuum quartz tube, and an ion discharge is generated by providing a voltage difference (voltage drop) between two electrodes, thereby generating ultraviolet radiation. The power of UV lamp should meet the requirements (generally 80-120 w/cm); The maximum service life of UV lamp shall not exceed 1 200h, and it is generally recommended to use1000h; The ultraviolet lamp should be replaced every 500 hours. After a period of maintenance, two UV lamps can be used alternately, one for 500 hours and the other for 500- 1000 hours. Clean the lamp before use and rotate it counterclockwise for 1/4 cycles. The name source UV is the abbreviation of ultraviolet ray. The spectral range of industrial ultraviolet light source is 200 nm -450 nm, with 365 nm as the center. According to different bands, UV-A, UV-B and UV-C have different uses. The intensity of common specifications of UV lamps depends on the power density of UV lamps. The common specifications are: 80W /cm, that is, 200 w/ inch 120W /cm, that is, 300 w/ inch 160W /cm, that is, 400W/ inch, 240W /cm, that is, 600 w/ inch, that is, the low-voltage UV lamp can be killed immediately. 2. The high-pressure mercury lamp with strong ultraviolet rays is made of high-quality pure timing control, which makes ultraviolet rays penetrate to a high degree and in large quantities. Its arc length/luminous length can range from 5 cm to 300 cm, and the common power is 30 watts to 200 watts per cm. Ultra-high power ultraviolet lamps generally work at 200W or more per cm. The spectral effective range of the lamp is 350-450 nm, the main peak is 365 nm, and there are more than 700 varieties. The power is 100w-25kw. UV curing is called UV curing or UV coating in English. Ultraviolet curing is a photochemical reaction, that is, liquid curable materials are printed or coated on the surface of substrate or workpiece, and then cured by ultraviolet irradiation. UV curing is similar to the traditional drying process, but the principle is different. Traditional drying generally forms hardening through the volatilization of solvents in coatings, while ultraviolet curing crosslinking has no solvent volatilization. 3. Metal halogen lamps are based on mercury ultraviolet lamps containing mercury and argon, and iron, potassium or other rare earth elements are added. Iron-doped halogen lamps especially enhance the highest peak of 380hm. Mainly suitable for curing ink and paint, and exposure of dry film, wet film and green solder mask. In screen printing and curing, the drying effect of coloring, especially thick coating products and black and white is outstanding. Scope of application: 1 Spraying: Generally, it is a plastic spraying company such as mobile phone shell spraying, cosmetic box, MP3 small household appliance shell, etc. Mainly with. The two industries, mobile phone shell spraying and uv printing, have different requirements for uv, depending on their respective products and equipment. Most mobile phone shell spraying companies have 6-8 tubes (in one coating line). As long as the parameters are provided correctly and the specifications and parameters of their ultraviolet tubes are known, the substitutability can be guaranteed. 2. Printing: screen printing, offset printing and five-color printing are mostly used. Like portable disks and optical disks, use anti-ultraviolet glue. When printing optical discs, uv ink is also used for screen printing. In screen printing, most of them are printed with uv ink. It has the advantages of fast drying, good adhesion, and various properties meet the standards (adhesion, wear resistance, etc.). ) .3. Shoe industry: The materials of soles are irradiated with ultraviolet rays to make them react chemically, so that the adhesive has good affinity with soles and uppers. Shoes are suitable for gluing, and uv glue is used for plastic bonding, such as plastic tube bonding for hospital infusion. Generally, companies that make high-grade travel shoes can use them. The business of this industry is based on technology. 4. Wood industry: only surface coating is carried out, because uv coating (varnish, etc.). ) has a good performance in all aspects, such as wear resistance, acid and alkali resistance, weather resistance and so on. After uv coating, surfaces such as wood floors can feel gorgeous. Wood painting, most of the lamps used are long, and the power is about1000 mm. 5. pcb, LCD industry: PCB is a circuit board uv tube. Metals (metal halide lamps) are usually used for printed circuit boards. Another kind of exposure lamp is also used for exposure and development when making metal halide PCB, which is generally used by circuit board companies. The LCD is a display screen. Generally, low-pressure cold ultraviolet lamps are different from curing lamps, but they all belong to ultraviolet lamps and have different uses. 6, crafts glazing: as long as it is a craft that uses uv glazing oil, you can use uv tubes. 7.uv automatic coating line: electrostatic precipitator gun or electrostatic precipitator rod is used for pretreatment, which is often called corona treatment, because the surface tension of plastic is very poor. After corona treatment, the surface tension of the substrate is improved, and the affinity between the substrate and uv paint is strengthened, which will have better curing effect. If the pretreatment is not done well, the adhesion of the product will also be problematic. As mentioned above, the uv spraying company will be provided by uv equipment manufacturing company, uv lamp manufacturing company and uv coating company. Therefore, every employee in our business needs to know about some other projects that lead to curing failure, such as uv accessories and equipment. In order to ensure the normal and good work of the UV lamp, the following factors need to be ensured: a. Choose a matching lighting power supply, and the matching leakage transformer/capacitor should be consistent with the voltage/current required by the UV lamp. The rated power/secondary voltage/working current/insulation coefficient/withstand voltage of leakage transformer and the capacity/withstand voltage/charging and discharging times of capacitor directly determine the luminous efficiency/stability and life of UV lamp. Adjust the fan to match the power of the ultraviolet lamp. Note: Strong wind is not allowed to blow air to the surface of the lamp tube for cooling, otherwise the low surface temperature of the lamp tube will cause the lamp tube to extinguish the arc and turn off the lights. C. Select the appropriate reflector: the standard lampshade customized by UV lampshade is spotlight lampshade. Parameter classification One of the parameters of UV lamp: the power supply voltage of UV lamp. Generally, the voltages of UV lamps are 220V, 380V, 1 10 V, and 220V is widely used, which is also in line with our daily life. The power supply can stabilize the voltage and protect the UV machine. The second parameter of UV lamp: the working voltage of UV lamp, which is also called tube voltage in the industry. The tube voltage is the voltage across the lamp. The stability of tube voltage determines the normal operation of ultraviolet lamp and ultraviolet equipment. The third parameter of UV lamp: the working current of UV lamp, commonly known as tube current, will directly affect the normal operation of UV lamp. The fourth parameter of UV lamp: the starting current of UV lamp is the instantaneous high current when starting UV lamp. Because the instantaneous starting current of the ammeter of the UV curing machine is large when it is started, manufacturers will also choose a matching ammeter with higher standard, and the ammeter above 30A can avoid the damage to the UV lamp when it is started. The fifth parameter of UV lamp: the power density of UV lamp. Density refers to the concentration of extremely high energy per square centimeter. The sixth parameter of UV lamp: the diameter of UV lamp. According to different uses, manufacturers will consider the diameter and caliber of the lamp when configuring UV lamps and UV machines, because the diameter will affect the energy of the lamp, making the overall configuration poor. The seventh parameter of UV lamp: the polar distance (luminous length) of UV lamp is simply the distance between lamp electrodes. The polar distance length of UV curing machine will affect the effective irradiation of UV lamp. Installation matters 1. Before installation, wipe the lamp with ethanol, and then put on clean gloves to hold the lamp. 2. Install the lamp hole on the card holder and insert the lamp with a cloth pad. Don't let the lamp touch the metal end plate, but let the lamp rub into the cloth. UV lamps with wiring direction must pay attention to the direction. Otherwise, it will damage the lamp tube, shorten the service life or overheat the surface of the lamp tube. 3. After the lamp tube is installed in place, hold the lamp holder by hand and put it on the card holder several times to see if the lamp tube is in a free state, so that it will not burst when lighting. 4. Sometimes when checking the lamp tube, the ultraviolet lamp tube is removed and observed, and it is found that there are traces of handprints on the wall of the lamp tube, which can't be wiped off. This is because the lamp tube was installed without gloves, and the sweat and dirt on the hand stuck to the lamp tube and sintered on the timely glass crystal through high temperature carbonization. In severe cases, air leakage occurs at the spot position, causing the lamp tube to be scrapped. 5. Install or replace the ultraviolet lamp tube, please turn off the power when cleaning the lampshade, otherwise you will get an electric shock. 6. Maintenance of the lamp tube During the use of the ultraviolet lamp, clean the surface of the lamp tube and the surface of the reflector with anhydrous alcohol and gauze at a proper time (1~2 months), and then rotate the ultraviolet lamp tube at 180℃. The reflector of the lampshade will be replaced if it loses its mirror effect. There are four supporting parts: transformer, capacitor, lamp tube and lampshade. Can produce and process 2 KW to 20 kW transformers. Transformer can be divided into copper wire and aluminum wire. Capacitors can be customized from 18UF to several UF. Lamps can be processed and produced from 200W to tens of kilowatts. The lampshade is determined according to the length of the lamp body itself. Service life generally refers to the time that it can maintain enough energy to run, during which its energy gradually decays until it is below the acceptable range. General standard UV lamps can radiate enough ultraviolet energy for 800 hours, and the service life of imported UV lamps can reach 1500 or more. Because of its curable life, it is widely used in bamboo and wood flooring, furniture, decorative materials, printing, tin printing, plastic painting, signs, circuit boards and so on. It is also an ideal light source for bonding and curing semiconductors, electronic components and liquid crystals. Influencing factors of service life: (1) design service life. The following factors have great influence on the life of UV lamps. First, the pipe wall load. The life of load headlight is short, the working current is the same, the lamp diameter is small and the lamp life is short. Operating voltage. High lamp voltage and short service life. C. power density. High power density and short lamp life. (2) materials. The quality of the timely glass on the tube wall has a great influence on the life of the lamp. Good timely glass has high purity, no bubbles inside and smooth surface. Because the temperature of the tube wall is generally above 600℃, if the purity is not enough, there will be gasification on the glass surface, resulting in many tiny pits, which will affect the ultraviolet radiation outside the tube wall. The eyes of domestic quartz tube can directly see that there are bubbles on the tube wall, which will affect the ultraviolet radiation of the tube wall, and the bubbles will form high-pressure air mass explosion at high temperature to rupture the tube wall. The electrode material is usually a layer of barium zirconate or other cathode emitting materials coated on the surface of tungsten wire. The aging resistance and temperature resistance of tungsten wire and cathode material directly affect the life of electrode. (3) production process. This factor is the most important factor that restricts the quality of domestic UV lamps. The main processes that affect the life of the lamp tube are: cleaning the inner wall of the lamp tube, vacuumizing, purity and injection amount of mercury, argon filling amount, electrode lead welding, cathode material sintering and so on. The whole process should be carried out in an advanced clean place; The sintering, welding and sealing of cathode materials should be completed under vacuum conditions. At present, domestic manufacturers of UV lamps do not have these conditions, which greatly affects the service life of lamps. (4) how to use it. Improper use will greatly reduce the service life of the lamp. The following points should be paid attention to when using: a, the transformer parameters should match the lamp parameters, and the voltage and current should not exceed the design index. In particular, the starting voltage should not be too high, generally not exceeding 40% of the designed working voltage. B, keep the pipe wall clean, especially to remove oil stains and dust. Because these substances will penetrate into the lamp tube on the surface of the tube wall at high temperature, which will hinder ultraviolet radiation. C, ventilation is scientific and reasonable. The ventilation rate should be calculated scientifically. The purpose is to suck the heat generated by UV lamp out of the lamp tube and let the lamp work at room temperature, not the lower the temperature, the better. Ventilation keeps the temperature of the lamp holder below 150℃. In addition, the temperature of the circuit, sensor and box shell in the light box is kept below 90℃, and the air volume is reasonable. Reason for failure 1. What is the reason for the fog of UV lamp? If there is fog in the tube, it is (1) the problem of the timely tube, that is, the dehydroxylation is not good. (2) or poor exhaust during production. (3) The purity of the charged gas is not enough. If there is fog outside the tube, the gas volatiles of uv ink and UV varnish are attached to the tube wall, which can be wiped regularly with solvents such as alcohol. Second, the main causes of deformation of UV lamp, and what are the adverse reactions after deformation? The main reason for the deformation of UV lamp is the high temperature. Slight deformation will not affect normal use, but the service life will be shortened a lot. Severe deformation will make the tube wall on one side of the lamp thin and break. Check whether the fan is damaged or the exhaust pipe is too long to cause poor exhaust. 3. What is the crystal adsorption in the ultraviolet lamp? In the process of making ultraviolet lamp, the time tube was not cleaned and there were impurities. 4. What happened to the bubble burst of the ultraviolet lamp? Because the local temperature is too high or the quartz tube wall is too thin. Check whether the exhaust system is unobstructed. 5. What is the reason why the metal head of 5.UV lamp always melts and burns out? A) The metal lamp holder is oxidized for a long time, resulting in excessive current due to poor local contact, which leads to ignition and melting. B) The new lamp melts because the metal head of the UV lamp is in poor contact with the lamp holder, and the virtual connection leads to ignition melting. Check whether the copper contact of the lamp holder is oxidized and whether the spring is elastic. 6. What is the reason why the ultraviolet lamp tube can't be lit for several hours (the lamp is intact)? If it is a metal halogen lamp, it is because the halide ratio is not suitable, or the output of the transformer is too low, or the tube pressure of the lamp is too high. If it is a mercury lamp, it may be the inherent quality problem of the electrode and lamp tube, or the lamp has air leakage. 7. What's the matter with the black ends of the 7.UV lamp? The electrode powder peeled off and stuck to the pipe wall. If some domestic lamps are used for one or two hundred hours, this is not normal. 8. What is the reason for the sudden exposure of the UV lamp in use? A) Excessive current (e.g. short circuit of capacitor circuit) B) Dirty things touch the pipe wall when inhaling. C) electrodes such as molybdenum and platinum are poorly sealed. 9. The pressure of the 9.UV lamp always drops, so why can't it rise? A) the exhaust volume is too large; B) the temperature of the cold electrode can't go up. C) The electrical parameters of transformer, capacitor and lamp tube do not match. D) The grid voltage is too low, which leads to the low output voltage of the transformer. X. After the UV lamp is used for 300-500 hours, why are there hand lines on the pipe wall? A) Touching the lamp wall by hand during installation will cause this phenomenon. B) If there is something inside the wall, the quartz tube is not clean enough when used as a lamp. XI。 The current and voltage of ultraviolet lamp are normal, but the light emission is abnormal. What is the reason for the dim green and yellow? (1) The lamp power parameter is incorrect. (2) The lamp tube has slow leakage. (3) The exhaust of the lamp tube is not clean during manufacturing. (4) The transformer is small. 12. What happened when the UV lamp was turned on for the first time and turned off normally, but never turned on again? If the capacitor and transformer are in good condition, the line is unobstructed, and there is no bad contact phenomenon (there is voltage at both ends of the lamp), it is the lamp itself, usually there is something wrong with the electrode or the lamp leaks. Taboo 1. It is forbidden to directly touch the ultraviolet uv lamp tube by hand to avoid scratching or damage, or shorten the service life of the lamp tube; 2. Pay attention to the direction of the lamp with wiring direction requirements, otherwise it will damage the lamp, shorten its life or overheat the surface of the uv lamp; 3. Due to the great pressure in the ultraviolet lamp tube, please avoid damaging the lamp tube by external forces such as impact and scraping; 4. Don't use it where there are flammable and explosive materials such as thinner, otherwise it will lead to fire or explosion; 5. Please don't look directly at the lighted ultraviolet lamp with naked eyes, otherwise it will lead to stinging eyes or decreased vision; 6. Don't let ultraviolet rays directly irradiate the skin, otherwise it will easily lead to the damage of ultraviolet rays to the skin; 7. Don't touch the lighted lamp tube or the lamp tube that has just been extinguished, otherwise the surface temperature of the lamp tube or reflector will be too high, causing burns; 8. Don't put inflammable and explosive articles such as paper or cloth near the lamp in use, otherwise it will cause a fire due to the high temperature on the surface of the ultraviolet lamp; 9. When opening the lamp tube in a sealed space, please exhaust it properly, because the ozone emitted by the lamp tube is very harmful to the human respiratory system; 10, try to avoid frequent switching of uv lamps, which will consume lamps every time and shorten the service life; 1 1, restart or open the lampshade at least 10 minutes after turning off the lamp, otherwise the lamp will be damaged or burned; 12. When installing or replacing the uv lamp, be sure to turn off the power supply when cleaning the lampshade, otherwise it will easily lead to electric shock; When there is poor cooling, it is necessary to remove the fault in time before continuing to run, otherwise the service life of the uv lamp will be seriously affected.