The electric heating radiant tube is to enclose the electric heating element in the protective sleeve. After being energized to generate heat, the sleeve indirectly radiates heat to the furnace lining and the workpiece. The heating of the radiant tube is suitable for the furnace with protective atmosphere and corrosive atmosphere. Because the electric heating element is placed in the casing, the heat transfer process is different from the general open type electric heating element, and its thermal shielding is large. During the heating process, the temperature of the electric heating element must be controlled separately to prevent the element from overheating. According to data analysis, a carburizing furnace controls the temperature inside the radiant tube and the furnace temperature at a low temperature stage. The temperature difference between the two is about 300 ℃. When the temperature is higher than 800 ℃ and is thermally stable, the temperature difference is still 120 ℃ to 140 ℃.

Note:

　　 (1) Place refractory gasket on the bottom of the tube;

　　 (2) Hang it correctly, handle it lightly, and take measures in time if it is deformed. When placed horizontally, there should be a support frame;

　　(3) Separately control the electric heating element when the temperature rises;

　　 (4) In high humidity weather, components should be prevented from absorbing moisture, and should be assembled immediately after opening, warmed up for a few minutes, and then powered on. In case of high humidity weather or areas, do not heat too quickly.

Features:

The self-produced, designed and manufactured electrothermal radiant tube is the standard product of the enterprise, which are birdcage type, flat ribbon helical type, round wire helical type, multi-spiral type and other electrothermal radiant tube heating body, the use temperature is up to 1200 ℃, the inner core is made of The resistance wire is composed of a ceramic support frame, and there is no shielding between the inner core and the outer protective sleeve, and heat dissipation is good.

　　 Outer casing system adopts seamless high temperature resistant alloy pipe, centrifugal cast pipe, non-metallic special anti-carburizing sleeve, etc. The electric heating element is enclosed in a protective cover, and after being energized and heated, the heat is indirectly radiated to the furnace lining and the heated workpiece by the sleeve.

　　 is to enclose the electric heating element in the protective sleeve to avoid the corrosion of the electric heating element by the furnace gas. After being energized and heated, the heat is indirectly radiated to the furnace lining and the heated workpiece by the casing. The shell adopts high temperature resistance, high thermal strength, oxidation resistance, high-temperature alloy centrifugal casting with good carburization resistance or imported high temperature resistant stainless steel plate rolled, thin tube wall, fast heating and high radiation efficiency. The heating element of the electric radiation tube is made of high-quality high-temperature resistance alloy wire. The belt is processed by U-shaped or spiral type and fixed on the corundum ceramic frame. The insulation resistance is high, safe and reliable, the temperature difference between the heating element and the furnace chamber is small, and the working furnace temperature can reach 1000 ℃. Power supply: AC power frequency 50HZ, power deviation less than or equal to 3%, insulation resistance> 2k.Ω, surface load <2 (W/cm2), due to the reduced shielding effect of the resistance wire, even under high surface load in the tube Ensure long service life.

Use:

　　 1. Prohibit long-term over-temperature, overload use.

　　 2. When the furnace temperature is higher than 400℃, no rapid cooling is allowed.

　　 3. Do not touch the radiant tube when loading and discharging.

　　 4. When the furnace is working, always pay attention to whether the traffic lights on the control panel are normal. During the heat preservation, the traffic lights should be replaced once to avoid burning the radiation tube due to the failure of the control switch.

　　 5. Pay attention to the working condition of the instrument at any time and find out that the furnace temperature and the instrument indication are abnormal, and it must be analyzed and processed in time.

　　 6. For furnaces with a capacity of more than 100KW, it is better to install an ammeter for inspection in each heating zone. There should be an ammeter for each phase of the three-phase high-temperature electric furnace.

Maintenance:

　　 1. After three to four months of use, pull out the radiant tube, pour out the dust in the radiant tube, and turn the radiant tube 180 degrees to use.

　　 2. Note the positive and negative poles of the radiant tube, and exchange the positive and negative poles from March to April.

　　 3. After pulling out the radiant tube, be careful when disassembling the binding posts, and do not hit or knock the lead rod.

　　 4. The bolts leading out of the terminal clamp are prone to oxidative loosening, and should be regularly checked and tightened.

　　 5. Ordering instructions

　　 (1) The user should provide product drawings or samples. If there are no drawings or samples, the product specifications, model, voltage, power, length, diameter and other information must be provided;

　　 (2) According to customer needs, we can provide customers with design solutions.