Large power stainless steel tubular type heating resistance box

Abstract

The invention relates to a large power stainless steel tubular type heating resistance box, the resistance box comprises a resistance box body (1) and a resistance box cover (2), a plurality of tubular type resistors (3) are provided in the resistance box body (1), the tubular type resistors (3) comprise a stainless steel pipe (31), a resistance wire (32), an insulation stuffing (33), a flange (34), a porcelain (33), a nut (37) and heat shrinkage insulation pipes (38), the resistance wire (32) and the insulation stuffing (33) are provided in the stainless steel pipe (31), the flange (34) is fixed on the stainless steel pipe (31), the porcelain (35) is provided between the flange (34) and the nut (37), the flange (34) and the porcelain (35) are screwed and fixed by nut (37) through the screw thread (36) on the stainless steel pipe (31), the heat shrinkage insulations pipes (38) are provided at two ends of the stainless steel pipe (31), and the resistance box cover (2) is covered on the resistance box body (1). Compared with prior art, the invention has the advantages of stable performance, long usage life, strong profile plasticity, simple and feasible treatment process, fast heat radiation, convenient usage and the like.

Description

technical field [0001] The invention relates to a resistance box, in particular to a resistance box for high-power stainless steel tubular heating. Background technique [0002] At present, in the field of industrial resistors, there are various forms of high-power resistor boxes used. From the structure and shape of the resistance elements inside the resistance box, there are mainly the following types: wire-wound resistance resistance box, which is to directly install the resistance wire into a certain shape and then used in the box; plate-type resistance resistance box, which will The resistance material is prepared into a plate, and then directly installed in the box for use; the wire-wound coating resistance box, the resistance wire is wound on the ceramic skeleton, and then the surface of the resistance wire is coated with an organic or inorganic coating, and installed in the box after drying. Used in the body; the heat dissipation resistance box of the aluminum profi...

AI Technical Summary

Problems solved by technology

Due to the lack of protection for the resistance wire (board), the wire-wound resistance box and the plate-type resistance box have poor corrosion resistance and short service life; although the wire-wound paint resistance box protects the resistance wire, the coating The ability to withstand temperature is limited. With the passage of time, the paint on the surface of the resistor will soon fall off, and then the resistance wire will be corroded, and the service life will be relatively short; the aluminum profile shell can protect the resistance wire, but the heat dissipation effect is sacrificed. In addition, the aluminum alloy casing is limited in temperature and power. When the power is too high, the aluminum profile resistance box is not suitable for use.

Therefore, the above types of industrial resistance box products mainly have disadvantages such as weak environmental resistance, short service life, slow heat dissipation and low safety factor in use.

[0003] Due to the lack of protection for the internal resistance of the resistance box in the existing technology, or the limited protection conditions, the overall environmental resistance of the resistance box is weak, and the resistance is often corroded and rusted during use, which seriously affects the service life. In addition, the existing resistance box is not insulated. , often have shortcomings such as insufficient withstand voltage coefficient

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