Ultrasonic cleaning machine maintenance points

Ultrasonic cleaning machine maintenance 1. It is strictly forbidden to splash conductive liquid (such as water) from the air inlet of the top of the ultrasonic control cabinet. Otherwise it will cause serious damage to the line system of the washing machine.
2. Take care to keep the machine clean and turn off the power when not in use.
3. Avoid collision or severe vibration of the machine.
4. Keep away from heat sources.
5. The machine should be stored in a humid environment.
6. The continuous working time of the machine should not exceed 4 hours. If the continuous working time is too long: the ultrasonic adjusting knob should be rotated to the "0" position, and the cooling fan should continue to work. In the state where the ultrasonic cleaning is not started, the ultrasonic control cabinet continues. Allow at least 2 minutes of heat dissipation.
7. After a long-time cleaning machine, first turn the power knob to zero position before stopping, use the fan to work for another 3-6 minutes and then shut down to ensure the heat dissipation inside the power supply.
8. The cleaning solution should be precipitated, filtered or replaced in time to ensure the cleaning effect.
In order to make the system cleaning machine work normally for a long time, in addition to avoiding non-standard operation, it is necessary to regularly maintain and maintain the cleaning machine, and do the following work:
1 Regularly clean the contaminated cleaning fluid in the storage tank.
2 Run the oil pump once a time, at least 10mmin each time.
3 After the washing machine is used up, cover it with a cover to prevent dust and moisture.
Routine Maintenance - After each operation 1. Flush the hose and filter into the cleaner to remove any detergent residue to help prevent corrosion.
2. Turn off the water supply connected to the pressure washer.
3. Trigger the trigger on the servo gun lever to release all pressure from the hose.
4. Remove the rubber hose and high pressure hose from the pressure washer.
5. Disconnect the spark plug connecting wires to ensure that the engine does not start (for engine type).
Electric type:
Turn the power switch to the "on" and "off" positions four to five times, 1-3 seconds each time to remove water from the pump. This step will help protect the pump from damage.
Engine type:
Slowly pull the engine's starting rope 5 times to remove the water from the pump. This step will help protect the pump from damage.
Regular maintenance - every 2 months maintenance 1. Regular removal of fuel deposits from the storage tank will extend engine life and performance. Precipitates of fuel can cause damage to fuel lines, fuel filters and carburetor.
2. Protect your high pressure cleaner with the Kärcher pump protection kit (9.558-998.0) when not in use. The pump's protective cover is specially designed to protect the high pressure cleaner from corrosion, premature wear and freezing. Also apply lubricant to the valve and seal to prevent them from getting stuck.
Electric type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump guard and open the valve.
4. Start to turn on the washing machine; draw all the contents of the tank into the pump.
5. Turn off the washing machine; now the high pressure cleaner can be stored directly.
Engine type:
1. Turn off the pressure washer.
2. Disconnect the high pressure hose and servo gun lever from the pump.
3. Connect the valve to the pump guard and open the valve.
4. Ignite, pull the starter rope; draw all the contents of the tank into the pump.
5. The high pressure cleaner can now be stored directly.
Maintenance instructions for hot and cold water pressure washers 1. Weekly maintenance Check the oil level If the oil is emulsified (ie the oil tank is in the water), contact the after-sales service immediately.
Clean the inlet filter.
2. Monthly maintenance Clean the detergent filter.
Perform maintenance operations, cleaning, and adjustment.
3. 500 hours of work per year. Change the oil.
Unscrew the oil drain bolts and drain the used oil to a designated container to avoid polluting the environment. After the oil is drained, reinstall the bolts and add new oil to the middle of the required scale.
4. Clean the heating pipe soot If the heating pipe is blackened by the fumes in a short period of time, you should ask the after-sales service personnel to check the burner. If the burner is damaged, it will increase fuel consumption and pollute the environment.
5. Heating pipe descaling If the equipment is repeatedly turned on and off at the maximum operating pressure or if the high pressure pipe is not connected at the maximum water flow (the pressure on the pressure gauge is above 10 BAR), both of these conditions will cause scale.
We recommend that you contact your after-sales service to clean up the scale and check the dosage of the descaling solution.
6. Clean the fuel tank Remove the fuel tank Carefully rinse the fuel tank. If it is washed with water, dry it after washing.
Reinstall the fuel tank on the device.
7. High-pressure pipe Carefully inspect the high-pressure pipe All high-pressure pipes must be safe. The working pressure range value and the manufacturer's mark must be printed on it.
The high pressure hose cannot be twisted, twisted, pressed or damaged. Damaged high pressure hoses are very dangerous and must be replaced immediately.
It is dangerous to use a low-pressure pipe as a high-pressure pipe or to repair it casually. You can only use the marked and tested high-pressure pipe (the original high-pressure pipe of the equipment meets all safety requirements)
8. Connecting the wires The wires should not be damaged. If there is damage, they must be replaced immediately.
IX. Use after a long time of use If the equipment is left for a long time, there may be calcification, which may make the equipment difficult to start or damage. In order to avoid overheating damage caused by the power of the motor, we recommend that before starting the equipment, Start at 3 times.
Maintenance and Maintenance Precautions Since the internal active components of the machine mainly use electric vacuum devices and the internal voltage is high, care should be taken during maintenance. When measuring voltage, accurately adjust the voltage range of the multimeter. Pay attention to safety for the measurement of higher voltage parts. The static (non-energized) measurement is mainly applied to the high voltage power supply. Unless otherwise emphasized, the MF-47 multimeter is used.
The machine consists of two parts: the ultrasonic generating source and the transducer. When checking the machine, the transducer must be in good condition. The inspection method is to use a megohmmeter (shake table) voltage of 1000V, and the measuring transducer is positive. The insulation resistance value of the negative electrode (that is, the resistance between the connector plugs 3 and 4) is required to be greater than 20 MΩ. If the resistance is found to be small or even close to zero ohm, it is certain that the transducer is damaged and can only be repaired by the manufacturer. Or replace the new transducer.
The source of occurrence is also called ultrasonic power supply. Its function is to convert the power frequency power supply into an electrical signal higher than the audio frequency or the high frequency of the audio transducer. The transducer for the XDS-5C type generally works. Within the range of 18KHZ+0.5KHZ. The source of the working principle is to push the transducer by amplifying the signal generated by the G1 oscillation through several stages. However, due to the special nature of the operation of the electron tube, there are some differences between the local and common transistor circuits. The voltage values ​​mentioned below are measured when the machine is turned on but not at high voltage. The following analysis is specific.
The signal oscillating part is composed of G1 6N3 as the core. The 6N3 contains two basically the same triodes. One constitutes the RC oscillating circuit. The external timing component that determines the oscillating frequency is R1 R2 R3 R4 C1 C2 C4 C5, C1 C2 is the frequency on the panel. Adjusting the double capacitor, adjusting W1 can not only adjust the oscillation intensity of G1, but also the oscillation frequency follows. In the adjustment process, it is better to balance the amplitude of the oscillation voltage and the oscillation frequency. When adjusting the frequency of C1 C2 (frequency adjustment) Can vary between 16KHZ - 20KHZ. The ZD5 on the picture is a 110V/8W bulb that is used as a temperature compensation resistor. The check point of the oscillation level signal is at the upper end of W2. By detecting the voltage of this point to the ground (the casing can be regarded as a DC point), especially the frequency value, many problems can be seen, and the fault inspection range is narrowed. Thus the signal input of the frequency meter is connected at this point. If the reading of the frequency meter is zero or a small number can be regarded as the first stage does not start, then carefully adjust W1 to see if there is any improvement. If it is still the same, check whether the C1 has a touch or not, and whether the G1 power supply is normal. If the frequency deviates from 18KHZ, it is important to check whether there are any changes in the peripheral resistors.
The G1 oscillating signal is adjusted by the power potentiometer W2 and sent to the gate of the G26N8P. The G2 is also a package with two identical transistors. The amplified signal of one tube is coupled by C9, and the R13 and R14 are divided to another tube. The G3 gate is simultaneously sent to the other half of the G2 tube for inversion and sent to the G3 gate via C10. L1 is the load inductance of G3. The amplitudes of the two tubes output in G3 are basically equal, and the signals with opposite phases are sent to the two gates of G4 through L1. By measuring the voltage on L1, the operation of G2 and G3 can be determined. When W2 is adjusted, the voltage on L1 should be changed from 0V to 20V (AC voltage). G2 and G3 faults are relatively rare. It is important to check the capacitance on the signal path. If half of the tubes are not working properly, check the bias resistor.
In addition to L1, the G4 peripheral component is B4. It is a coupling transformer with a high primary voltage of about 600V and a secondary signal voltage of about 0-45V (AC voltage) varying with the adjustment of W2.
The anode voltage of G1——G4 is rectified by BG1—4 through the relevant winding of B2, filtered by ZL1 and C16, regulated by G9 and G10, and then obtained by partial pressure division.
The anode voltage of G5 and G6 is rectified and filtered by B5 winding and applied to the B6 primary center tap. The voltage here is 1200V (DC). This voltage is turned on simultaneously with the high voltage. If it is only necessary to check the working state of G5 and G6, the voltage should be high. The remaining fuses in the path are disconnected for complete safety. If you must measure together with the latter, pay attention to safety.
G5, G6 should pay attention to the two short-circuit resistances connected to the anode - R23, R24 open circuit, at this time the B6 secondary pole AC voltage will be different. Generally determine the working state of G5, G6 level to disconnect BX7-9 to measure the B6 secondary voltage. At this time, open the low voltage, wait for the time relay to arrive, turn on the high voltage switch, adjust the power potentiometer, and the B6 secondary center tap should It is -56V (DC voltage) voltage, the other two terminals are 120V (AC voltage) (power adjustment to maximum), if the machine is working normally (BX7-9 is not disconnected) the voltage can reach up to 300V (AC voltage ) (black meter pen signal, red pen ground). G7, G8 constitute the output stage, this part of the voltage can reach 2200-3000V (DC voltage). The general method can not directly measure the voltage. The search for this part of faulty components is mainly static measurement, and the common tools are better to use megohmmeter. If it is possible to find a 2500V class shaker as the best, this part of the fault is relatively more, discussed in detail below.
[Note] This part involves high pressure, unskilled professionals should not rush to repair, so as not to cause personal and property damage!
The 380V three-phase power is boosted by about three times through the three-phase step-up transformer, and then three-phase full-wave rectification by six 2CL56G 10KV/1A silicon stacks through BX7-9, and added to the center end of the output transformer B7 through ZL4 and C22 filtering. The two anti-short-circuit resistors R31 and R32 are added to the anodes of G7 and G8. Due to the high voltage, the failure rate of this part is high. In general maintenance, attention should be paid to moisture, dust, and frequent cleaning. In places where the environment is relatively humid, it is best to use an insulating varnish to prevent the high-voltage rectifier silicon stack from being fired. This part of the easily damaged component has G7 and G8, which generally exhibits an anode-to-gate breakdown, resulting in a high voltage short circuit. This can be measured with a shaker and the insulation resistance should be greater than 30 MΩ, but not infinite. The high-voltage rectifying silicon reactor is also a component that is relatively easy to damage. If the high voltage is turned off immediately and the BX7-9 is blown, the silicon stack should be inspected with a shaker. Its forward and reverse resistance should have a big difference. When troubleshooting the failure of the anode of the tube to the gate breakdown, pay attention to whether the resistance on the gate of the tube is blown, and whether the two filter capacitors of C14 and C15 are broken, otherwise the power output will not be normal after the tube is replaced.
The rest of the contactor control part of the principle is relatively simple, the main functions are as follows: J1 provides 220V (AC voltage) to the input of the regulator, after the regulator is regulated, the filament transformer is supplied, and other 220V (AC voltage) power supply is required. local. JS and J2, R37, and R38 ensure that the G7 and G8 are added for a few minutes and half of the filament voltage is warmed up at the time of power on. K2 and J4 ensure that the high voltage can not be turned on when the power potentiometer is not at the zero position to prevent the starting current. J6 turns off the high voltage when the high voltage current exceeds 1A at 2200V (DC voltage).
Typical failure analysis:
1 Open low-voltage frequency meter shows 0.01KHZ, no power output after high voltage.
Since the frequency meter display is not normal, it can be judged that G1 is not oscillating, and after adjusting W1 is invalid, it is found that the frequency adjustment capacitors C1 and C2 have a touch phenomenon. Troubleshoot after trimming with tools.
2 After the power is turned on, the frequency meter displays normal, but the high voltage has no power output.
In this case, first check whether the voltage on L1 is normal to determine which level the fault is. If it is normal, then the first level is checked backwards. However, it should be noted that since L1, the signal is divided into two ways. Generally speaking, the signal is not Normal will not affect the work of the other way. If the signal disappears at a certain level, it is important to check the power supply and the coupling transformer. The fault in this case is the B4 primary open circuit.
3 boot output current is low, only 1.2A--1.5A, the transducer sounds.
The fault with low power involves more parts. It may be that there is only one way to push the signal. This may be reflected in the voltage at both ends of the B6 secondary (AC voltage to ground, the measurement method is discussed in the corresponding discussion). The level finds the signal voltage to find the fault, and it is also possible that one of the last stage power amplifier tubes does not work, which can be determined by the temperature of the air outlet after the machine has been working for a period of time. Another rare occurrence is that the anode voltage of G7 and G8 is low. It is important to see if BX7-9 has an open circuit. In this example, the BX8 open circuit causes the voltage after rectification to be low, but the fuse will not blow itself. The cause of the fuse should be detected to avoid a larger fault. The cause of the fault in this case is that the rectifier silicon stack is damaged by moisture, and the BX8 fuse causes the G7 and G8 power supply voltages to be low and the output voltage to be low.
4 The failure phenomenon is the same as 3 cases, but the transducer is silent.
This fault is quite special. After inspection, it is found that except for the lower secondary voltage of B6, the amplification of the front level is normal. After the user is asked, the cause of the fault is that the fault occurs after the tube is damaged and replaced. After careful searching, the problem is found: BX7— 9 All fuses, after the other faults are removed, the fuse machine returns to normal. Generally speaking, if there is no anode voltage, the screen current should be small.
5 The fault is that when the high voltage is turned on, the high voltage contactor is disconnected immediately, and sometimes the BX7-9 will be blown.
This type of fault phenomenon indicates that there is a serious short-circuit fault in the high-voltage circuit. You can use the shaker to check the insulation resistance of each component of the corresponding high-voltage part of G7 and G8. If there is a low resistance, first disconnect the capacitor and check one by one. The focus is on silicon stacks and tubes. There is a special case. If the silicon reactor is damaged more than two times at a time, it is necessary to pay attention to whether there is a possibility that the secondary voltage of the three-phase transformer is short-circuited by the primary turn-to-turn, so do not open the high voltage again. If you want to power on the test, at least disconnect the tube and be careful when powering up. It is best to be able to determine the fault without powering up to ensure complete safety.
6 After the power is turned on, the output current is large, but the transducer is silent.
Check the transducer and matching inductor. The transducer may be damaged and cause a short circuit. When the transducer is short-circuited, it must be replaced in time to avoid more serious consequences.
7 The output current is normal, the frequency is normal, but the cleaning effect is not good, and the product is often cleaned in half.
The main reason for the replacement of the common transducer after the fault is that the new transducer is not installed correctly. The upper transducer should be adjusted to about 2-3 cm away from the upper end of the product. The lower transducer can be placed under the mesh belt. . And the upper and lower transducers are relatively staggered to prevent the ultrasonic vibrations from canceling each other out.
8 burned high-voltage silicon reactor after starting up. This kind of problem is more complicated: I think there are several possibilities;
(1) The high-voltage circuit has a serious short-circuit phenomenon. This type of fault is generally accompanied by high-voltage insurance. This type of fault can be determined by a megohmmeter with a voltage of up to 2500V DC. Each component is tested for high-voltage ground. The resistance of the case can be used to find the damaged component. This failure may be caused by the possibility of the tube.
(2) There is a short circuit between the primary turns of the three-phase step-up transformer; the secondary voltage rises more, which may require a single-phase voltage regulator and a self-made voltmeter that can measure the high voltage; Connect the self-made voltmeter to the insulation, (see Figure 3), carefully adjust the voltage of the regulator from low to 220V AC voltage, and compare the three-phase results.
(3) The output transformer is damaged.
FU-5F high-power electronic tube fault final stage power tube FU-5F works in high voltage state, the application conditions are relatively poor under industrial conditions, due to various reasons, the early effective failure of the tube is more common, according to our experience, as long as strictly adhere to some Note that this type of failure is completely avoidable.
Matters needing attention: 1 to ensure the normal air volume required by FU-5F air cooling, pay attention to regular check whether the fan pipeline is unblocked, regularly clean the dust on the fan blade and the dust inside the FU-5F radiator. Special emphasis must be paid to the fan steering after the power supply is changed!
2 Regularly check the output voltage of the AC voltage regulator to ensure that the voltage deviation of the FU-5F filament is not more than 10%, especially not to be too high, so as not to shorten the service life of the tube. It is better to replace it with the cap after replacing the new tube, or Remove the oxide layer above.
3 Before stopping the machine after the machine is shut down, continue to ensure that the fan continues to work for 5-15 minutes to prevent the tube from suddenly cooling. Usually try to avoid the situation of sudden cooling and heat. Do not drop cold water onto the hot glass tube to avoid bursting the tube.
4 Ensure that the output current (ie, the screen current) of the final stage power tube does not exceed 2A.
FU-5F electron tube damage and determination method Due to the particularity of its structure, the determination of damage is more complicated. The following is a summary of some books and personal experiences. The reference books are mainly for the practical repair of large-scale launch tubes. The manual (Chinese Broadcasting and Television Press, November 1994 edition) mentioned in the book and the faults that are common in our work have the following faults: If the cause of the damage is the quality of the pipe, you can contact the pipe manufacturer for replacement. The only domestic manufacturer is Beijing Dongfang Electronic Tube Factory. The quality requirements of the manufacturer must be within three years after the date of delivery. Also require the instructions and certificate of conformity to be complete and fill out the corresponding contents in the instructions. Completely packaged and returned to the factory with a complete original sponge packaging material.
1 Air leakage is the main cause of high voltage short circuit. The pipe shows evaporation in the pipe wall, especially at the top of the pipe. The pipe is not bright or dark after adding the filament voltage. Check the anode with a megger. The insulation resistance of the cathode is very low, only 5-6 MΩ, and the inside of the tube can be seen to flash red, pink or violet. At this time, use a multimeter to check again to see if the resistance is found. If there is resistance, it is a pole. No resistance is leaking. Generally, the insulation resistance should be high but not infinite. If the resistance is infinite, there is no flash in the tube. The sound of a fire is definitely a complete leak. Part of the reason for the air leakage is the shortcomings in the manufacturing process of the manufacturer. It is not mentioned here that the reason related to the user is that the tube is subjected to external force, especially when the tube is subjected to external force impact during installation and transportation, the glass bulb bursts, and the user should use the original packaging when transporting. The material is packed and transported carefully. Care should be taken during installation. In particular, when installing the top of the tube and the three copper caps of the screen, hold the caps with your hands to avoid breaking the pins or twisting the seals; The pipe is slowly leaking, and various external conditions will corrode the metal material of the pipe to cause air leakage. Therefore, since the pipe is purchased as soon as possible after use, the possibility of air leakage after the pipe inventory is long increased. If the tube is not well cooled during operation, it will cause a large amount of gas to be released in the tube. The performance is like a leak, so the cooling must be ensured during operation, and the electrodes should not be overheated.
2 anode breakdown of the gate, generally leaking inside the tube or too much internal harmful gases.
3 pipe wall cracking or perforation, the general reasons are: insufficient cooling, causing local overheating of the pipe wall; poor contact between the pipe cap and the electrode lead-out ring, causing local overheating; the machine has strong detuning or parasitic oscillation, which requires the machine to work Keep up with the resonant frequency of the transducer, pay attention to the reading of the frequency meter. If it is found that the individual tube is overheated during operation, check whether the push signal is superimposed with the parasitic oscillation signal. And by changing the size of the filter clutter capacitor, after the tube is damaged, carefully observe the red paint at the joint between the glass bulb and the copper heat sink. This is a heat-resistant paint. If it is black, it is a problem.
4 The output current drops. For old pipes, if the usage time is more than ten months, this is a normal aging phenomenon. If the requirements are not met, consider changing the pipe. For some new tubes that have been used for less than a month, they can be compensated by increasing the output voltage of the oscillating stage.

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