CN2166573Y

CN2166573Y - Acid-corrosion resisting, anti-oxidation electrothermal tube

Info

Publication number: CN2166573Y
Application number: CN 93219873
Authority: CN
Inventors: 吴仕式
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-30
Filing date: 1993-07-30
Publication date: 1994-05-25
Anticipated expiration: 2003-07-30

Abstract

The utility model relates to a strong boiling acid corrosion preventing and oxidation resisting electrothermal tube which is jointly composed of a steel sleeve tube, an outer quartz sleeve tube, an electrothermal wire body, an inner quartz sleeve tube, a sealing porcelain post and conducting wires. The utility model has the correlation of the steel sleeve tube, the outer quartz sleeve tube, the electrothermal wire body, the inner quartz sleeve tube, the sealing porcelain post and the conducting wires that the electrothermal wire is close wound outside the inner quartz sleeve tube, the outer quartz sleeve tube is sheathed outside the electrothermal wire body, the sealing porcelain post is inserted in and is used for fastening tightly at a tube mouth of the outer quartz sleeve tube, the outer quartz sleeve tube is arranged in the steel sleeve tube, and a tube mouth of the steel sleeve tube is tightly sealed with the porcelain post. The electrothermal tube has the advantages of small size, high thermal efficiency, rapid warming, long service life, oxidation prevention, strong boiling acid corrosion resistance and abrasion resistance and can be widely used in various electrothermal occasions. The utility model can also be widely used for electromechanical products and fittings which require strong acid corrosion resistance, oxidation prevention and abrasion resistance.

Description

Acid-corrosion resisting, anti-oxidation electrothermal tube

The utility model---the anti-anti-oxidant electrothermal tube of acid corrosion that boils by force belongs to the electrothermal device technology.

Metal material electrothermal tubes such as the stainless acid resistant steel electrothermal tube of existing domestic and international industrial use, titanium alloy material electrothermal tube, only nitric acid and weak corrosive medium there is decay resistance preferably, but, hydrochloric acid, the sulfuric acid of boiling point but is corroded very soon, even is dissolved fully.And the common electrical heated filament that it adopts must draw back certain interval; Recharge magnesia powder and insulate, this just makes it have shortcomings such as thermal force height, the heat efficiency is low, useful life is short inevitably.Simultaneously, its high-temperature oxidation resistant, poor performance such as wear-resistant are difficult to satisfy the growing needs of industry such as oil, chemical industry, and all there are to a certain degree pollution in industry and environmental protection.

The purpose of this utility model is exactly that the thermal force height, the heat efficiency that have the existence of metal material electrothermal tube both at home and abroad now are low, useful life is short in order to overcome, corrosion of high-temperature oxidation resistant, anti-strong acid and shortcomings such as poor performance such as wear-resistant, the anti-anti-oxidant electrothermal tube of acid corrosion that boils by force that develop and design a kind of ability boiling point strong acid burn into resistance to high temperature oxidation, anti-wear performance is good, the heat efficiency is high, the life-span is long.

The utility model is realized by following structure technology scheme: the structural representation of the anti-anti-oxidant electrothermal tube of acid corrosion that boils by force as shown in Figure 1, it is by the anti-acid corrosion Abrasion Resistant Steels sleeve pipe 1 that boils by force of surface oxidation-resistant, quartzy outer tube 2, surface insulation is anti-oxidant close around electric heating filament 3, quartzy inner sleeve 4, seal porcelain knob 5, lead 6 grades are formed jointly, its mutual alignment with interconnected relationship is: heating wire is close to be around in quartzy inner sleeve and to become the end heating wire lead-in wire of electric heating filament 3 electric heating filaments 3 to pass in the quartzy inner sleeve 4 outward, to prevent heating wire lead-in wire and the close electric heating filament short circuit that is around in outside the quartzy inner sleeve, it is external that quartzy outer tube 2 is set in the close heating wire that is around in quartzy inner sleeve outside, be used to isolate electric heating filament and steel sleeve 1, to prevent that heating wire body 3 from contacting with steel sleeve 1, reach high-insulation, be with the mouth of pipe that quartzy outer tube 2 was filled in and be fastened to porcelain knob 5 that seals of fairlead, electric heating filament 3 two ends lead-in wires from the fairlead that seals porcelain knob 5 pass and with seal the porcelain knob fit sealing, quartzy outer tube 2 is installed in the steel sleeve 1 that has only a port, the mouth of pipe of steel sleeve 1 with seal porcelain knob 5 fit sealings, lead 6 goes between with electric heating filament two ends and is connected.

The utility model is compared following advantage and beneficial effect with existing metal electric heating pipe: 1. because heating wire 3 of the present utility model selects for use surperficial coated that the lectrothermal alloy wire of insulation oxidation resistant coating is arranged, so can need not to resemble and to draw back certain interval the common electrical heated filament and recharge the magnesia powder insulation, form and can closely be around in quartzy inner sleeve outer surface, therefore, volume is little, thermal force is low, the heat efficiency is high, quick heating, energy-conservation about 20%, the life-span is long; 2. because the surfaces externally and internally coated of steel sleeve 1 has high rigidity, anti-any concentration boiling point strong acid corrosion, the reinforced alloys coating of resistance to high temperature oxidation, therefore, this electrothermal tube has anti-any concentration boiling point hydrochloric acid, sulfuric acid, the acid corrosion resistance to high temperature oxidation that boils by force such as nitric acid, the advantage that anti-wear performance is good, it is corrosion-resistant, wear-resistant, antioxygenic property is all than the existing stainless acid resistant steel of domestic outward appearance, the titanium alloy heat pipe is high tens times, therefore, not only can extensively replace stainless acid resistant steel and titanium alloy electrothermal tube, also can be widely used in to use the occasion of stainless steel and titanium alloy, thereby can save stainless acid resistant steel and titanium alloy in a large number, and can significantly reduce industrial pollution and the environmental pollution of using stainless acid resistant steel and titanium alloy to cause and can be widely used in petrochemical industry, electroplate, food, pharmacy, various thermoplastic machines, mould and other require high temperature, Fast Heating, the occasion of localized heating.

Figure of description is further specified as follows: Fig. 1 is the structural representation of the anti-anti-oxidant electrothermal tube of acid corrosion that boils by force, among the figure: 1 for the anti-acid corrosion Abrasion Resistant Steels sleeve pipe that boils by force of surface oxidation-resistant, 2 for quartzy outer tube, 3 for surface insulation anti-oxidant close around the electric heating filament, 4 for quartzy inner sleeve, 5 be lead for sealing porcelain knob, 6.

The utility model can be implemented preferably by following manner: by processing and manufacturing ordinary steel material steel sleeve 1 shown in Figure 1, the outer surface coated has the reinforced alloys coating 0.05～0.8mm of high rigidity, the acid corrosion of anti-any concentration boiling point, resistance to high temperature oxidation within it again; 2. select for use high-quality lectrothermal alloy wire close being around in after surperficial coated insulation oxidation resistant coating to form the electric heating filament outside the quartzy inner sleeve; 3. choose quartzy outer tube, seal porcelain knob etc., carry out connection by shown in the accompanying drawing 1 and top described each parts mutual alignment of specification and interconnected relationship again, just can implement the utility model preferably.The inventor has implemented many of this electrothermal tubes, and through test of many times and test, its main performance is as follows:

(1) case hardness: HV800～1200(HRC＞70);

(2) anti-oxidant: 1000 ℃ of not oxidation peelings, more excellent more than tens times than titanium alloy 1Gr18 Ni9Ti;

(3) anti-strong boiling point acid corrosion antioxygenic property such as following table:

Experimental condition	Temperature (℃)	Test duration (hour)	Corrosion depth (mm/)	Life-span
					Sulfuric acid 10～15%	Boiling point	700	＜0.15	Do not damage in 4200 hours
Hydrochloric acid 10～36%	Boiling point	25	＜0.15
					Nitric acid (concentration arbitrarily)	Boiling point	25	＜0.2
Anti-oxidant	1050～1060	300	The non-oxidation peeling	Do not damage in 2100 hours

Claims

1, a kind of anti-anti-oxidant electrothermal tube of acid corrosion that boils by force, it is characterized in that it is by the anti-acid corrosion Abrasion Resistant Steels sleeve pipe (1) that boils by force of surface oxidation-resistant, quartzy outer tube (2), surface insulation is anti-oxidant close around electric heating filament (3), quartzy inner sleeve (4), seal porcelain knob (5), lead (6) is common to be formed, its mutual alignment and interconnected relationship are: heating wire is close to be around in quartzy inner sleeve and to form electric heating filament (3) outward, one end heating wire of electric heating filament (3) lead-in wire passes quartzy outer tube (2) in the quartzy inner sleeve (4), and to be set in the close heating wire that is around in quartzy inner sleeve outside external, be with the mouth of pipe that quartzy outer tube (2) were filled in and be anchored on to porcelain knob (5) that seals of fairlead, electric heating filament (3) two ends lead-in wires from the fairlead that seals porcelain knob (5) pass and with seal the porcelain knob fit sealing, quartzy outer tube (2) is installed in the steel sleeve (1) that has only a port, the mouth of pipe of steel sleeve (1) with seal porcelain knob (5) fit sealing, lead (6) goes between with the two ends of electric heating filament (3) and is connected.