5fae=ingLiU fire detector cleaning technology and equipment category, the main cleaning objects of the fire detector cleaning factory are mainly the first two Beijing Guoan Fire Security Co., Ltd. Guoan fire detector professional cleaning factory Zheng Guoliang fire detector in the fire automatic alarm system In the nature of continuous operation, it must be sensitive all the time. Reliable workability, therefore, the fire detector after cleaning is guaranteed to be sensitive. reliable. These two points are the quality targets required by each fire detector user and cleaning factory. Our factory has been working in the fire detector cleaning industry since 1993. The experience of serving customers in the past 7 years has made us feel that after cleaning. The quality of the detector is guaranteed to be sensitive and reliable. Two points away is the basic quality requirement that must be possessed in the early stage of the cleaning plant. However, with the addition of cleaning experience, the cleaning technology of the fire detector will be consciously or unconsciously. The length of the cleaning is also included in the pursuit of cleaning factory cleaning quality. The high-standardized batch of fire detectors after cleaning is first put into the user's system for use, and its normal period is; after cleaning, the normal use period in the user system is 8. Cleaning manufacturers are different, cleaning process Different, it will be found that the normal use period 8 after cleaning will be very different. This difference, especially in the case of the cleaning quality of ion-type fire detectors, pays attention to this difference, which will make us re-examine the focus of the cleaning mechanism of the cleaning technology. The narrow part of the fire detector cleaning work is to detect the detector. Disassemble into individual parts, then wash them and then disassemble them. Each part plays a different role in the detector. It recognizes and analyzes which vertical part plays a key role. The cleaning cleanliness must be high and must be high. It is the cleaning fire detection that needs to be mastered in the cleaning process. The common types of devices are basically ion, photoelectric, and temperature sensing. At present, the photoelectric fire detectors used in the automatic fire alarm system are those with lower requirements on cleaning technology. The basic optical path working principle, 8 is that when there is no smoke, the receiving tube is not allowed to receive the light emitted by the transmitting tube. In this type, where the labyrinth is a part that shields light that may be reflected to the receiving tube, according to this principle, the photoelectric fire detector has two important points when cleaning: as long as it belongs to or resembles a maze The function of the parts, cleaning to the surface of the raw material, does not cause light reflection, can achieve the effect of the optical path without false alarms to come second: as long as the surface of the lens in the launch tube, the receiving tube and the optical path, can be cleaned to the naked eye The cleanness of the concave recognition judgment can achieve the optical path sensitivity of the original product design.
Ion fire detectors must be supported by highly insulating materials. The design structure of the ionization chamber is formed, and if the degree of bulk insulation and surface insulation of the material is reduced, the ionization potential of the original ionization chamber will be greatly affected, and the ion current which should be generated after the smoke in the ionization chamber will be bypassed. The amount of change causes the circuit to detect a signal that should not be present, causing the detector to not function properly. Therefore, support. The insulating part constituting the ionization chamber is the key to the cleaning cleanliness of the ion detector. It is also the most demanding cleaning technology in the class detector. The cleanness of the ion detector is also the durability of the ion detector that cannot be visually recognized by the naked eye. The key is the cleaning process 2 of the insulation part of the ionization chamber. "When water replaces Lyon, it must be solved for cleaning quality. Although the cleaning work of fire detector has its own particularity, in terms of cleaning technology, there is no essential difference between the cleaning technology of the electronics industry and the early electronic industry. The cleaning medium is basically Leon-based, and the cleaning of the fire detector naturally follows the way of this plant. A washing equipment that absorbs British technology and is also a cleaning medium, and uses the pre-process of Lyon cleaning method for nearly 3 years. It is also a combination of water and cleaning agent to remove dirt, but the dewatering phase process is unique. The superior voltage 4 is adjusted to the new one, so that the adjusted voltage sensitivity v is equal to the original set voltage sensitivity Vo, that is, the original voltage sensitivity is restored. Usually in practice, this method is also adjusted according to this method. As shown in the figure, the adjusted sensitivity of the smoke is obtained. / / Obviously, the voltage sensitivity of the detector obtained after such adjustment is obtained. The same value as the original device, but the sensitivity of the obtained smoke is not the same as the sensitivity of the original set of 1.1/15.
It can be seen that this simple electrical performance adjustment cannot restore the detector to the originally designed smoke sensitivity. A good way to solve the problem is to test the physical properties of the detector to find out if the technical indicators of the radioactive source are still within the allowable range of the design. If the technical specifications exceed the allowable range of the design, the radioactive source must be replaced. Re-use of a new radioactive source that meets the technical requirements, in order to finally solve the problem of only a few aspects of the evil, to illustrate that there are many deep technical problems in the cleaning of fire detectors, it is worth exploring.
The surface of the parts after cleaning in the previous process has a large amount of water and cleaning agent attached. Since the proportion of Lyon is greater than that of water, the washed parts are immersed in the Lyon solution, and the water on the surface of the parts will float out of the water like oil.
The sample floats to the surface of the Lyon solution, removes the moisture on the surface of the Lyon solution, and then removes the parts. Not only is the moisture attached to the surface of the part removed, but the key is that the impurities contained in the moisture are also largely eliminated. Thereafter, the part is held in the area above the Lyon solution, and the area is cooled, and the Lyon solution under the part is heated, and the heated Lyon vapor rises to the refrigerating area, and re-condenses into a liquid state and adheres to the surface of the part. As the condensed liquid increases, the contaminants remaining on the surface of the part after the dehydration process are gradually washed away. Therefore, the cleaning method of Lyon is a kind of cleaning process with very high cleanliness. In order to protect the environment, our factory started testing the water as the cleaning medium at the end of the year. At that time, the electronics industry used pure water to clean the process. We did not copy it because The pursuit of purity of water will inevitably increase the investment of equipment funds and the maintenance of water-making equipment. It does not meet the requirements of small enterprises, and the cost is low. The method is simple. We try our best to find a method that can be equivalent to the effect of Lyon dehydration process. Here we contact domestic manufacturers such as Taiwan, Singapore and other manufacturers of dehydrating agents. The result of the test is that the cost is not too high, that is, the other party's dehydrating agent is not suitable for the decontamination of the fire detector. Finally, the time of the year is passed, and the high-pressure airflow dehydration scheme we currently use is established. It has been proved that the simple method is used to control the airflow. In the oil. The water content completely removes impurities and surface moisture from the surface of the part at the same time before the water is evaporated. Using this process, we have achieved that when the water quality is far below the equipment design requirements, the cleaning of the insulation part of the ion fire detector should be achieved.
9700[Fire Detector Professional Cleaning Machine Our factory abandoned Lyon cleaning equipment for cleaning medium at the beginning of 1997. The design of the cleaning equipment with concave water as the medium was designed according to the age. The equipment was named after the cleaning. The slots form 8 cleaning steps, and the device is used up to now. With the use of experience and technical transformation work, at the end of 1998, the design and launch of the H-type styling product GA Dou 700, the machine improved the bulk of the original A-type machine, optimized the electrical design of the automatic control system, to the maximum extent The cost and price are reduced, which is the popular model recommended by our company to Tongjin. 9700[The cleaning machine consists of 4 cleaning tanks with a total area of ​​2 square meters. The standard detector structure can calculate the output of 500 detectors. The number of people in the operation is 1 minute. After the ordinary water is dissolved in the cleaning agent, the temperature is kept at 40 ° [left and right, the disassembled parts are first placed in the tank, and the cleaning liquid fully infiltrates the pollutants on the surface of the detector.
The second tank is an ultrasonic warming station, the cleaning liquid is still dissolved in the ordinary washing water, the ultrasonic washing tank, the ultrasonic rinsing tank 5, the pure water rinsing, the 4 pure water ultrasonic rinsing tank cleaning agent, and the parts are fully wetted in the tank and then moved into the second tank. By using the action of loosening and cavitation of the ultrasonic device and the separation of the cleaning agent, the surface of the part is loosened by the loosened contaminants.
The first slot is an ultrasonic rinsing station, which utilizes the action of loosening and cavitation of the ultrasonic device and the periodic inrush of ordinary water, diluting and rinsing a large amount of cleaning liquid and contaminants attached to the surface of the part. The structure of the lower part of the fourth groove is the same as that of the first groove. Still the ultrasonic rinsing station, but the regular flow of water is pure water, progressive dilution. Ultrasonic bleaching the residual cleaning liquid and contaminants on the surface of the detector. The upper part of the fourth tank is rinsed with pure water. The parts are rinsed in the lower part of the four tanks and moved to the upper part of the tank. The final spray is applied to the parts with pure water. Yi 9700: The standard cleaning process of the type cleaning machine is mainly used to clean the insulation structure of the ionization chamber of the ion detector. It consists of the following 7 steps: the first tank is rinsed, the tank is filled with no foam cleaning agent, and the cleaning liquid is used. Temperature 40 ° kernel, time 510 minutes.
â—ŽSecond bath ultrasonic washing, the same cleaning agent is put into the tank, the cleaning agent is subjected to ultrasonic waves during the cleaning process, causing water molecules to collide with each other, the temperature of the cleaning liquid will rise naturally, and the cleaning machine will be kept after the cleaning liquid is kept. The cooling circulation system is used for cooling. When cleaning, the surface surface contaminants must be observed at any time. As long as the contaminants are removed, the parts are immediately moved into the lower 3 H-slot ultrasonic rinsing without adding cleaning agent. The time is 510 minutes, the lower part of the fourth tank is pure water ultrasonic rinsing. Add cleaning agent for 5 10 minutes.
The upper part of the fourth tank is rinsed with pure water, and the spray device is used to spray the parts on the surface for a total time of not less than 3 minutes.
The high-pressure air stream is dehydrated, and the sprayed parts are blown to remove all moisture from the surface before the surface moisture is evaporated.
Drying, drying the part 51 for 1 hour using an oven capable of externally replacing the gas.
The design features of the washing machine 1 simple and varied control method ~97 volumes [The design of the type cleaning machine fully considers the simplicity of operation, the whole machine only starts, and the two buttons are closed. Every time you turn on the machine, just open the valve port in the normal water and pure water supply circuit beforehand, turn on the power, and then click the start button. The device automatically completes the water supply of each slot, the first slot starts to warm, the start button The indicator light inside indicates that the first slot is in the warming state. At this time, the operator puts the cleaning agent into the two slots and waits for the tank to warm up. The temperature is raised to 40° [: the time is about 20 minutes. The indicator light from the flashing to the long light is turned on. The operator puts the parts into the cleaning tube and puts them into the first slot. The cleaning machine starts to clean the timing. After hearing the prompt tone, the operator only needs to move the cleaning and sales into the lower slot. And put the parts that need to be washed in the original tank to complete the cleaning process of the detector housing, the non-light path parts of the photodetector, the non-insulated parts of the ion detector, etc., only after cleaning The surface can be seen without visible foreign objects, so it is not necessary to use all the slots of the washing machine. At this time, the washing machine has a built-in slot selection switch, which can stop the unused cleaning slots and improve the cleaning speed.
2The unique patented cleaning tank structure and high-performance ultrasonic device require the slot where the ultrasonic wave participates in the work. The cleaning tank is the main and auxiliary tank structure. The main tank is the working tank to place the cleaning parts. The sub-tank volume is smaller than the main tank, mainly responsible for the water level. adjust. The role of water level detection and overflow is designed to be placed frequently. When removing the part, keep the water level of the main groove free from fluctuations and maintain the ultrasonic oscillation frequency. The ultrasonic power is unchanged.
Ultrasonic oscillation power supply part adopts slow start, frequency tracking, automatic protection circuit design, combined with the water level stability structure of the cleaning tank, so that the cleaning machine will not seal due to the sudden change of ultrasonic oscillation frequency and oscillation power during the operation of the pumping operation. Ion detectors, printed boards containing field effect devices, or ionization chambers are inexplicably damaged during cleaning.
four. Key issues in the cleaning process Cleaning the fire detector must adopt a scientific method. When receiving the user, we often encounter some consultations that regard the cleaning technology as extremely simple. There is a phone that needs to purchase the cleaning agent separately. It is known that the other party is ready to clean on its own, and the other party is only a direct user of the detector, and does not have any cleaning conditions at all. Moreover, it is undeniable that there is also a method of scrubbing in the fire detector cleaning industry. The scrubbing method is not agreed here, but the colleagues in the detector cleaning industry are introduced to the following experimental facts: observation of the ion detector under the microscope The microscopic part of the insulation, when the air humidity is at a certain level, the surface of the insulation part of the detector with good performance is smooth, and the surface of the insulation is wet and dirty on the surface of the water. The role of connecting the surface of the uneven contaminant into a line or piece. If the surface of the insulation is damaged, a horizontally staggered groove is formed, and the moisture is affected by the tension, and the groove is also connected into a line or a sheet.
The above facts prove the cause of two abnormal states of the fire detector. , ionized detectors that are contaminated and not cleaned, and anti-static problems of fire detectors cleaning ojiba. Nanjing Fire Engineering Co., Ltd. cleaning plant Chen Jianfei fire detectors based on enemy light, transmitted light principle and ionization principle During use, due to external factors and grounding problems in the installation circuit, the internal components of the fire detector mostly have different levels of static charge accumulation. In the process of cleaning the detector, if there is no corresponding anti-static measures, It will cause the accumulation of static charge on the internal components of the detector. When the charge accumulates in a certain part of the fire detector, the potential of the part will rise. If the potential of the part rises to a certain amount, The fire detector will explode, sweep, discharge, corona or breakdown, causing damage to the detector. Invalid. Therefore, the anti-static problem of the fire detector is an important part of the whole process of the detector cleaning process. The purpose of anti-static treatment in the cleaning process of fire detectors is to make the electrostatic field of the fire detector surface evenly distributed, reduce the electrostatic leakage resistance of the fire detector, and prevent the static charge accumulation from being used in our company's anti-static treatment. The measures mentioned are as follows.
Anti-static treatment measures on the surface of the fire detector shell Before disassembling the fire detector, the operator must wear anti-static overalls and wear anti-static hand protection 5 ohms. During operation, avoid touching the internal module of the fire detector by hand. When the casing is in the air, when the ambient humidity method is fixed, there will be a misreport, that is, the phenomenon that the smoke is not reported. The ion detector that has been cleaned but the surface of the insulation is damaged is in the ambient humidity. When it reaches a certain level, there will also be a false alarm. The insulated gate field effect transistor of the insulated gate field effect transistor is easily damaged by the influence of static electricity, except for the fluctuation of the ultrasonic oscillation frequency and the oscillation power when designing the cleaning machine. The easiest way to strengthen the anti-static measures in the operating environment is to use a short-circuit clamp. Short-circuit the gate-source of the field effect after the disassembly to the time before assembly. The ultrasonic cleaning time control part is ultrasonically sprayed in the cleaning solution. The cleaning time is not as long as possible, because during the cleaning process, the pollutants will be separated at any time, and the cleaning solution cannot be kept very clean. After the contaminants on the surface of the part are completely detached, the parts are then carefully cleaned. The contaminants in the cleaning liquid will be worn under the vibration of the ultrasonic wave, and the surface of the ion detector will be worn. This will cause serious adverse effects.
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