Overview of electric heating radiant tube:
1. Wire-mounted spiral surrounds the electric heating radiant tube
This kind of electric heating radiant tube is composed of a heat-resistant alloy steel sleeve and a heater. The heater is generally composed of a φ3-5 mm electric heating wire wound on a heat-resistant insulating ceramic core with a spiral groove. The working voltage is 220V and the power is generally 5 -7KW.
2. Ribbon spiral surrounds the electric heating radiant tube
The structure of this heater is basically the same as the first structure, except that the heating element is wound with a resistance band. The resistance band is generally 1-3 mm thick and 10-20 mm wide. The cores are mostly multiple grouped tubes. The core composition, under the same surface load, the heat radiation area is large, and the material can be saved. Generally, the high-power point heating radiant tube adopts this form.
3. Axial zigzag cage type electric heating radiant tube (commonly known as squirrel cage type)
Its structure is to bend the resistance wire (belt) of the heating element into a "U" shape and string into multiple insulating and high-temperature ceramic support plates, fixed with a heat-resistant rod in the middle, the general effective length: 900-2400; general sleeve Tube outer diameter: φ80～φ280. Single root power: 2kw～40kw; single root voltage: 30v～220v. This kind of radiant tube has a long life.
Features of electric heating radiant tube
1. Practical and reliable. The products of our factory are handed over to the user to pass production verification, and the quality is reliable and durable.
2. The core material adopts DC argon arc welding to ensure various technical indicators such as surface load and resistance difference.
3. The heat-resistant insulation material is based on the German formula. The porcelain has good thermal shock resistance, high temperature resistance, long life and good surface quality.
The electrothermal radiant tubes designed and manufactured by our company are available in specifications for high, medium and low temperature furnaces and special atmosphere furnaces. The outer casing adopts seamless high-temperature resistant alloy pipe and coiled pipe, centrifugal cast pipe, non-metallic special anti-carburizing casing, etc. And according to the radiant tube heating element used in various atmospheres and harsh cycle conditions, the general resistance alloy can not be applied to the situation. The company's scientific researchers have developed a new special material for resistance alloy radiant tubes. The material is stable in performance, high in resistivity, and low in temperature coefficient. It is suitable for various radiant tube heating elements and replaces expensive imported materials with unique performance.
The advantages of electric radiant tubes are
1. Installation, testing, and maintenance are convenient, all of which are carried out outside the furnace. No need to stop the furnace or cool down the furnace temperature for maintenance and replacement of electric heating devices. Under normal production conditions, the replacement only takes about 10 minutes, which greatly reduces labor intensity and improves productivity. 2. The structure is compact, the performance is stable, the single power is large, and the service life is several times that of the ordinary electric heating tube.
(Electric heating radiant tube, electric heating radiant tube products can be customized according to customer requirements, providing drawings, voltage, power, size)
