What Is an Ultraviolet Lamp?

Ultraviolet lamp is a device that can emit ultraviolet rays. It is a necessary tool for observing the fluorescence and phosphorescence characteristics of samples. It is also a physical means for sterilization. The wavelength is in the range of 10 ~ 400nm.

UV is the abbreviation of English Ultraviolet, that is, ultraviolet light. Ultraviolet light (UV) is invisible light and is a segment other than visible purple light.

Electromagnetism, one of the physical concepts, is a collective term for the electrical and magnetic properties exhibited by matter. Such as electromagnetic induction, electromagnetic waves and so on. Electromagnetic phenomena were first discovered by Faraday. The cause of electromagnetic phenomena is fluctuations in the movement of charges. A magnetic field is formed, so all electromagnetic phenomena cannot be separated from the magnetic field. Electromagnetism is a branch of physics that studies the phenomenon of electromagnetic interaction and its interaction and its laws and applications. Maxwell's hypothesis on the magnetic field generated by changing electric fields laid the entire theoretical system of electromagnetics, developed electric and electronic technologies that have a significant impact on modern civilization, and profoundly influenced people's thinking about the physical world.

Moving charges can cause fluctuations. Its fluctuation mechanism is: when the moving charge e moves, it must be hindered by its adjacent e ground, which is shown by the moving charge driving its adjacent 1 to move upward, that is, the adjacent moving upward with the moving charge e; when the adjacent 1 moves upward, it must be affected by its Obstacles that are adjacent to one another are manifested in that adjacent one drives its own adjacent upward movement, that is, adjacent two moves upward with adjacent one ... In this way, it spreads forward and forms fluctuations. Obviously, the propagation speed of this wave in vacuum is the speed of light.

How does the fluctuation of the moving charge affect the small magnetic needle? Take the linear current as an example to analyze it. The small magnetic needle N is on the right side of the linear current I. When the small magnetic needle N is reduced to a circular current abcd, although the points a, b, c, and d are within the fluctuation range of the linear current I, the points a, b, The energy of adjacent movements at c and d varies. Obviously, Ea> Ec, Eb = Ed. In this way, the fluctuation of the linear current I has a clockwise torque on the ring current abcd of the small magnetic needle N. This moment acts on the electrons rotating around the nucleus, causing it to rotate clockwise, and its macroscopic expression is that the north pole vertical paper of the small magnetic needle N faces outward.

UV coating after UV radiation

Adding a photoinitiator (or photosensitizer) to a specially formulated resin, after absorbing high-intensity ultraviolet light in ultraviolet (UV) light curing equipment, active radicals or ionic groups are generated, which initiates polymerization, crosslinking, and grafting The reaction causes the resin (UV coating, ink, adhesive, etc.) to change from liquid to solid in a matter of seconds. (This change is called "

Strong ultraviolet high pressure mercury lamp

Manufactured from high-quality pure quartz tube to make ultraviolet rays; it can penetrate to a high degree and a large amount, and its arc length / emission length can range from 5 cm to 300 cm, common power is 30W to 200W per cm, super high power UV The lights are generally at

Product failure causes and solutions:

Possible cause of failure phenomenon

A UV lamp is off or self-extinguishing UV lamp aging

2. Air cooling is not enough

3 The power supply voltage is lower than 10%.

Clean up debris from the fan and rotor

Increase voltage

Second, the brightness of the UV lamp is insufficient. 1 The UV lamp is aging. 2 Replace the UV lamp.

Three UV coatings are not completely cured or completely dry . Low lamp power density

2. UV paint photoinitiator is insufficient

3 Short curing time or low ambient temperature

4 Replace the high-power UV lamp with the lamp too far away from the object; Change the UV coating; Increase the curing time; Increase the ambient temperature to adjust the distance;

Four new lamps start to illuminate or flicker 1 The lamp voltage is too high and the transformer does not match 2 The lamp power and related parameters are measured

Deformation of the five-lamp tube 1 The air cooling of the equipment is not good, 2 the surface temperature is too high 3 the air cooling system of the equipment is increased

Six fried lights 1. The lamp working current is too high

2. Dirt on the surface of the lamp or splashed on high temperature

3 Virtual connection

4 Short circuit

5. Power supply voltage mismatch Replace lamp

Pay attention to the surface of the lamp

Reconnect

Seven pressure device temperature is high . Power supply voltage is higher than 10%

2. Poor ventilation around the machine reduces the input voltage of the machine and strengthens the ventilation

Clean and dredge the surroundings of the machine

Eight lamp neck blew 1 The current is too high or the lamp head is not connected 2 Replace the lamp

Nine lamp heads blow up or dissolve. 1 The air cooling of the equipment is not good. The surface temperature is too high. Increase the air cooling system of the equipment.

Ten lights are too bright . Whether the transformer matches

2. Large lamp working current makes overload transformer run measurement

Changing lamps or transformers and ballasts

Ultraviolet is a kind of low-energy electromagnetic wave, which is widely used in medical, sanitary and epidemic prevention, food industry, pharmaceutical industry and other sectors because of its good bactericidal effect. But how to correctly use the ultraviolet lamp to ensure its sterilization effect, prolong the service life of the lamp tube, and avoid accidental injury, it is required that every operator master it first. Now I will talk about the experience of using it for several years. ^[2]

With the popularization of emerging UV coatings, inks and other photopolymer materials and UV radiation sources, UV high pressure mercury lamps have become more and more widely used in printing and coating industries. However, because operators do not know much about this technology, they use There are also many problems in China. As a manufacturer of UV light sources, we will inform you of the following precautions:

1. UV lamps must be matched with ballasts, magnetic leakage transformers and capacitors that are equally matched.

2. It must be installed according to the wiring diagram provided by the manufacturer.

3. The light box to which the lamp tube is installed must be equipped with a good air cooling system to ensure that the lamp tube dissipates heat and protects the substrate from thermal deformation.

4. Before the tube is put on the machine, you must use gauze to soak alcohol to wipe off the fingerprints and oily dirt on the outer wall of the lamp, otherwise it will cause devitrification of the lamp after the ignition. There is dust pollution in the environment. Please wipe the lamp with alcohol every other week to ensure that the lamp is not devitrified prematurely.

Fifth, the lamp holder and the contact point of the lamp should be kept in good contact during the whole use process, otherwise the lamp holder will be severely oxidized, causing the lamp tube seal to burst.

Sixth, the UV lamp must be started in the cooling state. ; When starting again, wait until the UV lamp is completely cooled before starting, after 5 minutes; the more frequent the switch, the shorter the life of the tube.

7. The average life of the high pressure mercury lamp of Xinguang Optoelectronics Light Source Factory is 00-1000 hours, and the surface temperature of the lamp tube is 600 ~ 700 during normal work. Mainly related to the number of times the lamp is started.

8. It is strictly forbidden to work under the overload condition of the lamps and transformers, so as to avoid lamp explosion or transformer burnout accidents. The power supply voltage fluctuation should not be too large, if it suddenly drops more than 5%, it may cause self-extinguishing. Any lamp tube that is burnt out and caused by the lamp tube to explode is not the inherent quality of the lamp tube, it is purely improper use and cannot be returned.

Nine, the transformer must have good natural ventilation conditions in order to dissipate heat.