Automatic four-pot four-mode melting chamber
1. Equipment structure and working principle
The XRF high frequency automatic casting and sample melting furnace is composed of four parts: heating system, control system, mechanical system, and water cooling system. The working principle of each system is briefly described as follows:
1. High frequency heating system:
After the 220V grid power is rectified and filtered, it becomes a 310V DC power supply. After high-speed switching of a high-power field effect tube (MOS tube), the DC power supply becomes a high-frequency current of 50-80KHZ, and then passes through the output in the LC series resonance circuit. The transformer is isolated, and the high-frequency current that is transformed into a low-voltage and large-current is delivered to an inductor manufactured in a certain shape, and the platinum crucible is heated by the alternating magnetic field formed by the high-frequency and large-current.
2. Control system:
Touch screen display and operation, using PLC control system, there are 10-15 kinds of programs for users to store.
3. Mechanical system:
Automatic casting: It is designed to coordinate the mechanical system and the control system, that is, the stirring method of the crucible is "centrifugal variable speed rotation". The crucible changes from stop-centrifugal slow rotation-centrifugal fast rotation-centrifugal slow rotation-stop. This continuous change makes the sample and flux change irregularly to achieve the purpose of mixing. The stirring also achieves shorter time and better effect. This mixing method is also unique to our company, and has declared a national utility model applicable patent.
The entire mechanical system consists of four actions:
Action 1. The sensor rises from the origin, and the sample starts to heat and melt.
Action 2. After melting, perform "centrifugal variable speed rotation" stirring, and the crucible continues to be heated to maintain a constant temperature. When the stirring is over, the sensor drops back to the original point.
Action 3. The crucible is moved to the top of the mold.
Action 4. The crucible is overturned to complete a sample preparation. Then the crucible is turned back to the level, and then moved to the top of the sensor.
4. Cooling part:
Composed of stainless steel water pump (no noise), water tank and exhaust fan, the cooling water system requires inlet temperature: 5-45°C; water quality: PH value 7-8.5; hardness no more than 60mg/L; conductivity less than 500VA/mm3; inlet water Pressure: 1×105 Pa—3×105Pa, through water cooling to ensure the normal operation of electrical components in the equipment.
2. Common features of high-frequency sample melting furnace
1. Easy to use: It is ready to use without preheating and keeping warm. It can rise from room temperature to over 1000℃ in 30 seconds.
2. Fast sample preparation: fast heating speed can achieve rapid sample preparation, a batch of samples can be made in 10 minutes, and it can work continuously for 24 hours, which is especially suitable for users of intermittent sample preparation; the output of two pots and two molds is equivalent to silicon carbide rods The output of heating four heads and four pots and four molds is equivalent to the output of heating eight heads of silicon carbide rods.
3. Safety and environmental protection: equipped with exhaust fan to remove exhaust gas and no large-area heat radiation is beneficial to the health of the operator.
4. Mold forming: reduce the repair rate of the crucible and good sample consistency.
5. Low follow-up costs: no expensive consumables, no need to replace heating elements, refractory materials, etc. regularly.
6. Good energy-saving effect: only heating the crucible and mold.
7. Small amount of platinum and gold: The same output of other heating equipment can be achieved with a small amount of crucible and mold.
8. Equipment protection: There are fault display and protection functions for water shortage, overcurrent, overvoltage, and overtemperature.
9. There is no large-scale heat radiation, and the operator's working environment is good!
3. Technical parameters of four pots and four molds:
MODEL | GH-4ZC |
Power supply | AC380V/50Hz |
Maximum output power | 2×4KW＋2×4KW（Melting and forming power output power） |
Oscillation frequency | 50-80KHz |
efficient | ≥85% |
Load duration | ≥80% |
Current adjustment range | 35～130A |
Time adjustment range | 0s～3600s |
Cooling water pressure | 0.1～0.3MPa |
Over temperature protection point | 40℃ |
The maximum temperature of the melt (specific conditions) | 1500℃ |
Work station rotation method | Centrifugal variable speed rotation on the horizontal plane + forward and reverse |
Rotating speed range of station | 0～180r/ min |
Station rotation radius | 0-20mm |
Maximum amount per batch | 4个 |
Temperature control accuracy | ≤±2.5℃ |
Forming method | Automatic casting |
Infrared temperature measurement range | 400℃-1200℃ |
Host volume (length × width × height) | 920× 620× 1108 (mm) |
New function description:
1. As the amount of sample preparation of this equipment increases while the heat is also increasing during work, our company specially commissions a professional manufacturer of water chiller equipment to customize the circulating water chiller for the sample melting furnace.
2. If the oil stone supporting the crucible and the mold is changed to a high-temperature alloy material, our equipment will have no vulnerable parts.
3. High-frequency heating has a temperature difference, but our company has a set of combined methods to solve this problem.
Chengdu Guiheng Technology Co., Ltd. Marketing Department
E-mail:guihengcd@163.com
Phone: 028-83690056 Fax: 028-83950753
Contact: Huang Qionghua Mobile: 13880616107
June 7, 2021
