Year1
- 型号：
- 齐全
- 规格：
- 定做
- 功率：
- 定制
1. The origin of single-head electric heating tube: (single-head) or (cartridge) electric heating tube (r) has a long-term name in the Chinese electric heating industry:. In the late 1990s, due to the widespread use of electric heating tubes in China, the shape of electric heating tubes was also found in many southern China. The electric heating tubes used in molds with one end out of the wire were called single-head electric heating tubes, which is very vivid. In foreign countries, it is called a cartridge heater, which is also a vivid name because the cartridge shell is cylindrical and one end is blocked. In China, it is called a single-head electric heating tube, which is a coincidence. The electric heating tube tubular heating element is a heating element in which a resistance wire is placed in a metal tube and the surrounding gaps are tightly filled with crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation, and then processed through other processes. The electric heating tube has the characteristics of simple structure, high mechanical strength, high thermal efficiency, high safety and reliability, convenient installation and long service life. Electric heating tubes are now widely used in various saltpeter tanks, acid-base tanks, air heating furnaces, drying boxes, hot molds and other devices. When choosing a heating tube, users should consider the heating medium and usage environment. We will recommend the best design solution for the rest.
2. Performance requirements of the single-head electric heating tube in the fuel tank
, temperature rise time
Under the test voltage, the time for the component to rise from the ambient temperature to the test temperature should not be greater than
, the rated power deviation< br/> Under the condition of sufficient heating, the deviation of the rated power of the component should not exceed the following specified range;
For components with rated power less than or equal to: &;%.
For components with a rated power greater than +%~-% or the larger of the two.
, leakage current
The cold leakage current and the leakage current after the water pressure and sealing test should not exceed.
The hot leakage current at the operating temperature should not exceed the calculated value in the formula but the maximum Not exceeding
/(&;.)
&;Thermal leakage current
&;Heating length
-Operating temperature ℃
When multiple components are connected in series to the power supply The leakage current test should be carried out on this group of components as a whole.
, Insulation resistance
During factory inspection, the cold insulation resistance should not be less than &;
The insulation resistance after long-term storage or use after sealing test should not be less than &;
at operating temperature The thermal insulation resistance should not be lower than the calculated value in the formula but the minimum should not be less than &;
R
「(-.)/」&;.
R&; Thermal insulation resistance &;
&;Heating length
&;Operating temperature ℃
, Insulation withstand voltage strength
The component should be maintained under the specified test conditions and test voltage without flashover and shock. Breakthrough phenomenon
, Ability to withstand power on and off
Components should be able to undergo multiple power on and off tests under specified test conditions without damage
, Overload capability
Components are within the specified Under the specified test conditions and input power, the component should withstand the cyclic overload test without damage
. Heat resistance
The component should withstand the cyclic heat resistance test without damage under the specified test conditions and test voltage. Damaged
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