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Spraying equipment SPRAY EQUIPMENT
Chromium oxide, yttrium oxide, and titanium oxide spraying equipment
Plasma spraying is a thermal spraying process that uses a plasma arc as the heat source and primarily employs spray powder materials.
广州三鑫生产的SX-80等离子喷涂设备在广东某外资企业应用临时施工现场
Product Description
Chromium oxide, yttrium oxide, and titanium oxide spraying equipment
(Introduction to the SX-80 Plasma Spraying Equipment)
Introduction to Plasma Spraying Technology
Plasma spraying is a thermal spraying process that uses a plasma arc as the heat source and primarily employs spray powder materials.
① Steps of plasma spraying
During plasma spraying, a direct-current arc is generated between the cathode and the anode (nozzle). This arc heats and ionizes the introduced working gas, transforming it into a high-temperature plasma that is ejected from the nozzle, forming a plasma jet. Powder particles are fed into the plasma jet by a powder-feeding gas, where they are melted, accelerated, and sprayed onto the substrate material to form a coating. The working gas can be argon, nitrogen, or a mixture of these gases with hydrogen added; alternatively, a mixed gas of argon and helium can also be used.
② Characteristics of plasma spraying
(1) Capable of spraying a variety of coating materials, especially high-melting-point and refractory materials such as refractory metals, ceramics, metal-ceramics, and other special functional materials;
(2) Inert gases can be selected as the working medium to reduce oxidative reactions of spray particles during their flight.
(3) The coating exhibits high bonding strength and low porosity; fine coatings can be prepared by controlling process parameters.
③ Main equipment for plasma spraying
Including the spray gun, powder feeding mechanism, rectifier current, air supply system, water cooling system, and control system.
Introduction to the Configuration of the SX-80 Plasma Spraying Equipment
The SX-80 plasma coating equipment was developed successfully based on the introduction and absorption of plasma spraying equipment such as the PT-A3000 and METCO-9M. Its overall performance level is comparable to that of the METCO-9M.
This equipment consists of the following systems: ① main power supply ② control cabinet ③ junction box ④ powder feeder ⑤ gas-electric safety center ⑥ spray gun ⑦ heat exchanger and piping connections, among others.
1. Imported SG-100 plasma torch (imported)
The SG100 plasma torch is a multi-mode torch rated at 100 kW, widely used in thermal spray applications. Thanks to its versatile performance, the SG100 is capable of depositing virtually any type of coating—from highly dense, wear-resistant carbide coatings to thermally insulating coatings with controllable porosity.
Features:
The unique design of the SG100 allows it to employ either internal or external powder feeding. Material specialists can develop a rational powder-feeding mode based on the coating performance requirements. Additionally, the two internal powder-feed ports of the SG100 can be used independently; when used simultaneously, they can achieve a higher spraying speed and enable the simultaneous mixing of different materials within the plasma jet. The external powder-feed port can also replace the internal one, and the internal and external powder-feed ports can be used in combination as well.
By adding optional accessories, the SG100 can be easily assembled into an extended-nozzle spray gun suitable for 2086 and 2700 models. It can also be modified into a 90° SG-100 spray gun, enabling spraying at different nozzle diameters to meet various application requirements. Below is a diagram of the 90° SG100 plasma gun.
A single SG100 unit can typically operate continuously for around 200 hours. Under specific operating conditions, components of the SG100 plasma torch can last up to three times longer than those of other torches. Thanks to the SG100’s fewer components and its self-calibrating design, assembly time is reduced and accuracy is enhanced, enabling the unit to meet even the most stringent and demanding GE acceptance criteria.
Other features, including automatic calibration and wear-resistant nozzle components with a longer service life, help reduce both operational and assembly costs. It can even operate at a power output of 100 kW.
Applicable nozzle
The SG100 can be used in three spray modes (subsonic, Mach I, and Mach II). Depending on the specific requirements, different anode and cathode configurations as well as gas distribution ring setups can be selected.
2. The SX-80 human-machine interface intelligent control system is... The control center for the entire equipment set
Features of the SX-80 Human-Machine Interface Intelligent Control System
The SX-80 human-machine interface intelligent control system, leveraging cutting-edge technologies, provides automatic control over the entire spraying system. The plasma spraying system boasts an advanced level comparable to similar foreign products, offering superior performance and ease of operation. The control cabinet features a PLC-based touch-screen control terminal that integrates operation, settings, help functions, display, process monitoring, and fault alarm surveillance into a single unit. This simplifies the panel design, making the system convenient to use and ensuring even simpler, more intuitive operation.
3. Gas Safety Center
Special Note: Since H2 gas is a flammable and explosive hazardous gas, and the mass flow meter used is an electrical component that could generate sparks, posing a risk of combustion and explosion, our company has specially designed and developed an independent “Water, Electricity, and Gas Safety Center” to provide safety protection during equipment operation.
4. SX-80 Main Power Supply
Silicon-controlled rectifier with a maximum input power of 85 kW and a duty cycle of 100%; maximum output power of 80 kW. It can operate normally under grid voltage fluctuations of ±15%, with current fluctuation ranging from ±1% to ±2%.
External dimensions: 1200mm (length) × 800mm (width) × 900mm (height)
Weight: approximately 300 kg
5. SX-80 Adapter Box
The transfer center of the entire spraying system connects the power supply, control cabinet, heat exchanger, and spray gun together. The enclosure is equipped with high-frequency ignition, water circuit, and air circuit control and alarm devices. The enclosure is mobile, and the length of the water cable is 5 meters (standard model).
External dimensions: 950mm (length) × 580mm (width) × 1700mm (height)
Weight: approximately 85 kg
6. SX-80 Powder Feeder
Introduction to the Technical Advantages of the Upgraded Intelligent Dual-Powder-Feeding System:
1. Parameters are set using a PLC and touch screen to precisely control powder feeding accuracy and feeding speed.
2. The system features two independent powder-feeding units: the large hopper has a capacity of 20 liters and uses a blade-type conventional powder-feeding mechanism, with a feeding rate of up to 150 grams per minute. The small hopper employs a rotary drum powder-feeding mechanism, making it suitable for delivering various ultrafine powders as well as difficult-to-feed mixed powders.
3. It features a fully enclosed plastic steel enclosure that is unaffected by external environmental factors such as temperature and humidity. The panel has a transparent glass door, providing a clear view of the powder-feeding status at a glance.
4. Optional features include a powder feeding vibration device, a powder tank heating device, and a metering and weighing device.
Intelligent Dual Powder Feeding System
SX-80 Plasma Powder Feeder Features ：
Provide one (dual-barrel) powder feeder.
Powder particle size range for delivery: 5–200 μ; Repeatability error in powder delivery is less than ±1%.
Two hoppers can deliver powder simultaneously, with a powder delivery rate ranging from 8 to 250 g/min.
A device used to store spray powder and deliver it to the spray gun according to process requirements. The main air supplied to the spray gun serves as the powder-transporting gas. As the powder-transporting scraper disc rotates, it feeds the spray powder toward the outlet of the powder feeder. Under the pressure of the gas, the powder is then ejected from the powder hopper and enters the spray gun. By adjusting the potentiometer on the control cabinet panel, the speed of powder delivery can be regulated.
7. Chiller unit (refrigeration system)
The cooling unit consists of a high-pressure water pump, a chiller, and a large stainless steel chilled-water tank. The high-pressure water pump operates at a pressure of 12 kg, the chiller has a capacity ranging from 5 to 10 HP, and the chilled-water tank has a capacity of 3 tons.
Note:
1. The cooling capacity is based on the following conditions: chilled water inlet and outlet temperatures of 12℃/7℃, and cooling water inlet and outlet temperatures of 30℃/35℃.
2. Operating Range: Chilled water temperature range: 5℃ to 35℃; chilled water inlet-outlet temperature difference: 3℃ to 8℃. To be used in environments where the condensing temperature does not exceed 35℃.
3. Unit Conversion: 1 kW cooling capacity = 860 kcal/hr; 1 RT = 3,024 kcal/hr; 1 kcal/hr = 3.969 BTU/hr.
1 metric horsepower (HP) = 0.735 kW
Note *The above parameters are subject to change without prior notice.*
Next: Tungsten carbide spraying equipment for screw flights, screws, stirring shafts, and conveying pipes
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