Squirrel_cage_radiant_tube

Squirrel-cage electric radiant tube      Squirrel-cage heat radiant tube heating element is a resistance wire (with) bent into a "U" shaped string into the multi-block insulated high temperature ceramic support plate in the middle with a heat-resistant rod fixation, general effective length: 900 ~ 2400; General sleeve outer diameter: φ80 ~ φ280. Single power: 2kw ~ 40kw; single voltage: 30v ~ 220v. This radiant tube longer life. Because of its structure is similar to squirrel cage known as the squirrel-cage radiant tube, squirrel-cage radiant tube called the squirrel-cage radiant tube heaters, axial twists and turns the heat radiation tube-shaped cage cabinet.   Squirrel-cage heat radiating pipe structure      1, wire-bound spiral surround this electric radiant tube electric radiant tube heater sleeve and a heat-resistant alloy composition, the heater generally consists φ3-5 mm electric wire around a spiral groove in the opening heat-insulating ceramic die operating voltage 220V, power generally 5-7KW.      2, ribbon spiral surround electric radiant tube heater such a structure is substantially the same as the first except that the heating element using resistance band around the system, resistance band general thickness 1-3 mm, width 10-20 mm, tube core are mostly composed of a plurality of packet mode dies, at the same surface load, heat radiating large, material can be saved, the general power point using this form of radiant tube heating.      3, axial twists shaped cage cabinet electric radiant tube (commonly known as squirrel cage) structure is the resistance wire (with) a heating element bent "U" shaped string into the multi-block insulated high temperature ceramic support plate, in the middle with a heat-resistant rod fixation, general effective length: 900 ~ 2400; General sleeve outer diameter: φ80 ~ φ280. Single power: 2kw ~ 40kw; single voltage: 30v ~ 220v. This radiant tube longer life.     Squirrel-cage electric radiant tube core made of U-shaped axially aligned end resistance welded wire support frame and ceramic composition, no shield between the inner core and the outer protective casing, good heat dissipation. Rated operating temperature of 1000 degrees of electric radiant tube, resistance wire made of Cr20Ni80 or 0Cr21Al6Nb, surface temperature up to 1200 degrees, with this material electric radiant tubes maximum operating temperature of up to 1,000 degrees, the support frame is alumina ceramic pieces. The outer protective casing is thin-walled heat cold drawn seamless steel pipe, the material is 1Cr25Ni20Si2 or 1Cr25Ni35Si2, the material is good high temperature oxidation resistance, high temperature creep strength, has some anti-carburizing properties, the radiant tube design and selection of the safety factor bigger. Rated operating temperature of 1200 degrees of electric radiant tube, resistance wire made of 0Cr27Al7Mo2, surface temperature up to 1400 degrees, with this material electric radiant tube short of the maximum operating temperature of 1250 degrees, the support frame is steel jade porcelain pieces. The outer protective casing is thin-walled heat cold drawn seamless steel tubes, material is Fe-Ni-Cr-Al-Re alloy, the material has ultra-high antioxidant capacity, long-term work of 1300 in an oxidizing atmosphere, 1360 of short-term anti- oxidation. It applies to the high temperature and low oxygen partial pressure and containing S, C environment. The companies design and manufacture of electric radiant tube, high, medium and low temperature furnace atmosphere furnace and special specifications arbitrary choice. Jacket pipe system using high-temperature alloy seamless tubes and coils of pipe, centrifugal casting, non-metallic special anti-carburizing casing. And in accordance with radiation tube heating element used in various atmospheres and harsh cycling conditions, the situation can not be applied in general resistance alloys under. Company researchers developed a new resistance alloy radiant tubes special materials. The material is stable, high resistivity, temperature coefficient is small, adapt to a variety of radiant tube heating element used in a unique performance instead of expensive imported materials.   Squirrel-cage heat radiation tube Features: 1, high-quality raw material production of seamless cold drawn steel tubes heat (maximum temperature of 1200 degrees) Manufacturing 2, the inner core using a resistance wire U-axially aligned end welding 3, resistance wire and a ceramic frame substantially unshielded, resistance wire and the furnace temperature is small 4, the maximum operating temperature of 1000 degrees, or 1200 degrees 5, the biggest advantage of the city industrial furnace radiant tube production is the choice of seamless cold drawn, thin-walled heat-resistant steel (1Cr25Ni20Si2 or 0Cr25Ni20Si2), the thermal radiation of their products than similar products 10% 6, using more than 8000h radiant tube heating alloy material used should have high electrical resistivity, electric conversion rate. Since the radiant tube is placed in the casing, the heat transfer process and general Chang Lu different type heating elements, which heat shield large element temperature must be controlled during the heating process, to prevent over-temperature components. Radiant tube heating when closed, the heating element surface temperature higher than the furnace temperature of about 100 ℃ -150 ℃. Therefore, when the selection to be analyzed furnace, the furnace temperature atmosphere, choose the correct heating materials.