CN-122002654-A - Manufacturing method of wide-voltage metal heating tube

Abstract

The invention discloses a manufacturing method of a wide-voltage metal heating tube, belonging to the technical field of electric heating devices; in the method, the length of a resistance wire of the metal heating tube is increased in the manufacturing process of the metal heating tube, so that the voltage value of a power supply used by the metal heating tube is improved, and the wide voltage use characteristic is obtained. The invention solves the technical problems of damage and shortened service life of the metal heating tube caused by overvoltage, greatly reduces the damage rate of the metal heating tube caused by overvoltage, greatly prolongs the service life of the metal heating tube, and improves the quality and the durability of the metal heating tube.

Inventors

• LI YONGDAO

Assignees

• 李永道

Dates

Publication Date

20260508

Application Date

20260211

Claims (3)

1. 1. A manufacturing method of a wide-voltage metal heating tube is characterized in that in the manufacturing process of the metal heating tube, the length of a resistance wire of the metal heating tube is increased, so that the voltage value of a power supply used for the metal heating tube is improved, and the wide-voltage use characteristic is obtained.
2. 2. The method of claim 1, wherein the resistance wire length of the metal heat pipe is increased by the following formula based on the voltage value of the power supply used for the metal heat pipe: When the heating power of the metal heating tube under the standard voltage U1 is set as P1, the length of the resistance wire is L1, the resistance value is R1, and the P1 = U1 2 /R1, when the voltage value of the power supply used by the metal heating tube is U2, U2 is greater than U1, and the resistance value R2 is = ( ) 2 R1, its resistance wire length l2= ) 2 L1。
3. 3. The method of manufacturing a wide voltage metal heat generating tube according to claim 1, wherein the voltage of the power supply of the metal heat generating tube is based on the maximum fluctuation of the voltage of the power grid.

Description

Manufacturing method of wide-voltage metal heating tube Technical Field The invention relates to a manufacturing method of a wide-voltage metal heating tube, belonging to the technical field of electric heating devices. Background The metal heating tube is a resistance heating device, which adopts a metal tube as a shell, is internally provided with a resistance wire and crystalline magnesia powder, has heat conduction and insulation functions, and is widely used as a heating device in industrial production and daily life by covering an industrial die for cooperative heating, opening a water tank for liquid heating and heating a closed container in an application scene. However, the metal heating tube in the market has strict requirements on voltage, and when the voltage is unstable, the metal heating tube is easily damaged due to overvoltage, or the service life of the metal heating tube is shortened, so that the metal heating tube becomes a difficult problem which is difficult to solve in the past. Disclosure of Invention Therefore, the invention aims to provide a manufacturing method of a wide-voltage metal heating tube, which solves the problems of damage and shortened service life of the metal heating tube caused by overvoltage. In order to solve the technical problems, the invention adopts the following technical scheme: A method for manufacturing a wide-voltage metal heating tube includes that in the manufacturing process of the metal heating tube, the resistance wire length of the metal heating tube is increased, the resistance is increased, the current is reduced, and therefore the voltage value of a power supply used by the metal heating tube is improved, and the wide-voltage use characteristic is obtained. As a preferable scheme, the length increase value of the resistance wire of the metal heating tube is based on the use power supply voltage value of the metal heating tube, and the calculation formula is as follows: When the voltage value of the power supply used for the metal heating tube is U2, U2 is greater than U1, and the resistance value R2 is equal to or less than the specification )2R1, its resistance wire length l2=)2L1。 As a preferred scheme, the voltage value of the power supply used by the metal heating tube is based on the maximum voltage fluctuation value of the power grid. Compared with the prior art, the invention solves the technical problems of damage and shortened service life of the metal heating tube caused by overvoltage, greatly reduces the damage rate of the metal heating tube caused by overvoltage, greatly prolongs the service life of the metal heating tube, and improves the quality and the durability of the metal heating tube. The wide-voltage metal heating tube device has wide application range, thereby improving the quality of related products manufactured in China, and being one of the main quality of the products. Detailed Description The present invention will be described in further detail with reference to examples. In the embodiment 1, the voltage of the power grid in China is 220V, most of the existing metal heating pipes are designed according to the standard voltage of the power grid to 220V as the power supply of devices, if 240V is used as the power supply of the metal heating pipes, the voltage of the metal heating pipes is 20V higher than the voltage of the power grid, and the problem that the metal heating pipes are damaged or the service life of the metal heating pipes is shortened due to overvoltage when the overvoltage of the power grid is 20V is solved. The invention provides a manufacturing method of a wide-voltage metal heating tube, which comprises the steps of increasing the length of a resistance wire of the metal heating tube in the manufacturing process of the metal heating tube, thereby increasing the resistance, reducing the current, improving the voltage value of a power supply used by the metal heating tube and obtaining the wide-voltage use characteristic. The length increasing value of the resistance wire of the metal heating tube is based on the voltage value of the power supply used by the metal heating tube, and the calculation formula is as follows: Setting the heating power of the metal heating tube at the standard voltage U1 as P1, the length of the resistance wire as L1, and the resistance value as R1, and then P1=U1 2/R1; When the voltage value of the power supply used by the metal heating tube is U2, U2> U1, the heating power p2=u2 2/R2, R2 is a resistance value, in order to keep the heating power consistent, p2=p1, r2=u2 2/P2=U22/p1= the power of the metal heating tube )2R1, its resistance wire length l2=)2L1。 The following examples are given: Setting heating wire length of 10cm, resistance 10Ω of metal heating tube under 220V standard voltage, And (3) calculating: The current i1=220v/10Ω=22a of the heating wire, the heating power p1=220v×22a=4840W; The device manufactured by the formula is manufactured by using the power supp