CN111935859A - Long-service-life composite metal heating pipe and machining process thereof - Google Patents
Long-service-life composite metal heating pipe and machining process thereof Download PDFInfo
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- CN111935859A CN111935859A CN202010617820.0A CN202010617820A CN111935859A CN 111935859 A CN111935859 A CN 111935859A CN 202010617820 A CN202010617820 A CN 202010617820A CN 111935859 A CN111935859 A CN 111935859A
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- Prior art keywords
- metal
- pipe
- insulating ceramic
- protective shell
- insulating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
Abstract
The invention discloses a long-life composite metal heating pipe which comprises a protective shell, two insulating ceramic heads respectively arranged at two ends of the protective shell, two conducting rods respectively inserted on the insulating ceramic heads, and a heating wire connected between the two conducting rods and arranged in the protective shell, wherein the protective shell comprises at least two metal pipes coaxially arranged from inside to outside, and the two adjacent metal pipes are made of two different materials, wherein one metal material is high in flexibility, and the other metal material is high in hardness, so that the hardness and the flexibility of the heating pipe are both considered, and the service life of the heating pipe in liquid is prolonged to be more than 3 times of the original service life; the two adjacent metal pipes are in gapless fit after being contracted, so that the heat conducting performance is not influenced. And the heating pipe can be bent and formed at will after the pipe is contracted.
Description
Technical Field
The invention relates to the technical field of heating pipes, in particular to a long-service-life composite metal heating pipe and a processing technology thereof.
Background
The common heating pipe protective shell is generally formed by compressing a layer of metal shrink pipe, the metal is selected and generally determined according to the working condition, and the common hardness and flexibility of a single metal are difficult to coexist. The heating pipe has large internal pressure during working, and the metal with higher hardness due to expansion with heat and contraction with cold can have tiny cracks after being switched on and off for a long time, so that the insulation can be reduced if the metal works in water. The metal with higher flexibility is difficult to bear the large pressure generated when the high-power heating pipe works. The two processes have strong pertinence to working conditions when the electric heating pipe is designed, and have great influence on the service life of the heating pipe if the electric heating pipe is used carelessly.
Disclosure of Invention
The invention aims to provide a long-service-life composite metal heating pipe and a processing technology thereof aiming at the defects of the prior art.
The technical scheme for solving the problems comprises the following steps: a long-life composite metal heating pipe comprises a protective shell, two insulating porcelain heads arranged at two ends of the protective shell respectively, two conductive rods inserted on the insulating porcelain heads respectively, and a heating wire connected between the two conductive rods and arranged in the protective shell, wherein the conductive rods are partially arranged in the protective shell, the heating wire is spiral, two ends of the heating wire are sleeved on the two conductive rods respectively, at least two circles of the heating wire are sleeved on the conductive rods, and insulating fillers are filled in the protective shell;
the protective housing from interior to exterior includes the tubular metal resonator of two at least coaxial settings, and two adjacent tubular metal resonators adopt two kinds of different materials, and one of them is the metal material that the pliability is strong, and another kind is the metal material that hardness is high, zero clearance fit between two adjacent tubular metal resonators, and the protective housing both ends adopt insulating porcelain head to seal respectively, insulating porcelain head and protective housing adopt welded connection.
Further, the insulating filler is magnesium oxide powder.
Further, the metal with strong flexibility comprises aluminum and copper.
Further, the metal with high hardness comprises carbon steel and stainless steel.
A processing technology of a long-life composite metal heating pipe comprises the following steps:
s1, respectively sleeving two ends of the heating wire on the two current conducting rods;
s2, sleeving an insulating ceramic head at one end on a section of conducting rod, and hermetically welding one end of the innermost layer of metal pipe on the insulating ceramic head;
s3, filling magnesium oxide powder into the innermost metal tube, sleeving the insulating ceramic head at the other end on the conducting rod, and welding the other end of the innermost metal tube on the insulating ceramic head in a sealing manner;
s4, welding the conducting rods at the two ends with the insulating ceramic heads in a sealing way;
s5, shrinking the innermost layer metal pipe;
and S6, sleeving a layer of metal pipe outside the innermost layer of metal pipe, shrinking the pipe again, welding the two ends of the metal pipe on the insulating ceramic heads at the two ends in a sealing manner, and repeating the step according to the number of the metal pipes.
The invention has the following beneficial effects:
the invention provides a long-life composite metal heating pipe and a processing technology thereof, so that the heating pipe has hardness and flexibility, and the service life of the heating pipe working in liquid is prolonged to more than 3 times of the original service life; in a liquid heating environment, the outermost metal pipe is made of a metal material with strong flexibility, so that the phenomenon of insulation reduction can not be caused in long-term on-off work, and in a complicated and severe heating environment, the outermost metal pipe is made of a metal material with high hardness, so that the situation that the heating temperature is too high and the metal with strong flexibility is melted is prevented; the two adjacent metal pipes are in gapless fit after being contracted, so that the heat conducting performance is not influenced. And the heating pipe can be bent and formed at will after the pipe is contracted.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 2;
in the figure: 1-a metal tube; 2-insulating porcelain head; 3-a conductive rod; 4-heating the wire; 5-insulating filler.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
A processing technology of a long-life composite metal heating pipe comprises the following steps:
s1, respectively sleeving two ends of the heating wire 4 on the two current conducting rods 3;
s2, sleeving the insulating ceramic head 2 at one end on a section of conducting rod 3, and hermetically welding one end of the innermost layer metal tube 1 on the insulating ceramic head 2;
s3, filling magnesium oxide powder into the innermost metal tube 1, sleeving the insulating ceramic head 2 at the other end on the conducting rod 3, and welding the other end of the innermost metal tube 1 on the insulating ceramic head 2 in a sealing manner;
s4, welding the conducting rods 3 at the two ends with the insulating ceramic heads 2 in a sealing way;
s5, shrinking the innermost layer metal pipe 1;
and S6, sleeving a layer of metal pipe 1 outside the innermost layer of metal pipe 1, shrinking the pipe again, welding the two ends of the metal pipe 1 on the insulating ceramic heads 2 at the two ends in a sealing manner, and repeating the steps according to the number of the metal pipes 1.
Example 1:
as shown in the figure, the long-life composite metal heating pipe comprises a protective shell, two insulating ceramic heads 2 respectively arranged at two ends of the protective shell, two conductive rods 3 respectively inserted on the insulating ceramic heads 2, and a heating wire 4 connected between the two conductive rods 3 and arranged in the protective shell, wherein the conductive rods 3 are partially arranged in the protective shell, the heating wire 4 is spiral, two ends of the heating wire 4 are respectively sleeved on the two conductive rods 3, at least two circles of the heating wire 4 are sleeved on the conductive rods 3, and magnesium oxide powder is filled in the protective shell;
the protective housing from interior to exterior includes two coaxial settings's tubular metal resonator 1, and two tubular metal resonators 1 adopt two kinds of different materials, and one of them is copper, and another kind is the stainless steel, and zero clearance fit between two adjacent tubular metal resonators 1, protective housing both ends adopt insulating porcelain head 2 respectively sealed, insulating porcelain head 2 and protective housing adopt welded connection.
The heating pipe in the embodiment is suitable for being used in a liquid heating environment, the outermost metal pipe 1 is made of a metal material with strong flexibility, and the phenomenon of insulation reduction cannot be caused in long-term on-off work.
Example 2:
as shown in the figure, the long-life composite metal heating pipe comprises a protective shell, two insulating ceramic heads 2 respectively arranged at two ends of the protective shell, two conductive rods 3 respectively inserted on the insulating ceramic heads 2, and a heating wire 4 connected between the two conductive rods 3 and arranged in the protective shell, wherein the conductive rods 3 are partially arranged in the protective shell, the heating wire 4 is spiral, two ends of the heating wire 4 are respectively sleeved on the two conductive rods 3, at least two circles of the heating wire 4 are sleeved on the conductive rods 3, and magnesium oxide powder is filled in the protective shell;
the protective housing is by interior and outer including the tubular metal resonator 1 of three coaxial setting, and inlayer tubular metal resonator 1 adopts stainless steel material, and medial tubular metal resonator 1 adopts the copper product, and outmost tubular metal resonator 1 adopts the carbon steel material, and zero clearance fit between two adjacent tubular metal resonators 1 adopts insulating ceramic head 2 sealed respectively at the protective housing both ends, insulating ceramic head 2 adopts welded connection with the protective housing.
The heating pipe in this embodiment is applicable to complicated abominable heating environment, and outermost tubular metal resonator 1 adopts the metal material that hardness is high, prevents that heating temperature is too high, and the metal that the pliability is strong melts.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (5)
1. A long-life composite metal heating pipe is characterized in that: the heating wire comprises a protective shell, two insulating porcelain heads (2) respectively arranged at two ends of the protective shell, two conductive rods (3) respectively inserted on the insulating porcelain heads (2), and a heating wire (4) connected between the two conductive rods (3) and arranged in the protective shell, wherein the conductive rods (3) are partially arranged in the protective shell, the heating wire (4) is spiral, two ends of the heating wire (4) are respectively sleeved on the two conductive rods (3), at least two circles of the heating wire (4) are sleeved on the conductive rods (3), and insulating fillers (5) are filled in the protective shell;
the protective housing from interior to exterior includes metal pipe (1) of two at least coaxial settings, and two adjacent metal pipe (1) adopt two kinds of different materials, and one of them is the metal material that the pliability is strong, and another kind is the metal material that hardness is high, zero clearance fit between two adjacent metal pipe (1), and the protective housing both ends adopt insulating ceramic head (2) to seal respectively, insulating ceramic head (2) adopt welded connection with the protective housing.
2. The long-life composite metal heating tube of claim 1, wherein: the insulating filler (5) is magnesium oxide powder.
3. The long-life composite metal heating tube of claim 1, wherein: the metal with strong flexibility comprises aluminum and copper.
4. The long-life composite metal heating tube of claim 1, wherein: the metal with high hardness comprises carbon steel and stainless steel.
5. A processing technology of a long-life composite metal heating pipe is characterized in that: the method comprises the following steps:
s1, respectively sleeving the two ends of the heating wire (4) on the two current conducting rods (3);
s2, sleeving the insulating ceramic head (2) at one end on a section of conducting rod (3), and hermetically welding one end of the innermost metal tube (1) on the insulating ceramic head (2);
s3, filling an insulating filler (5) into the innermost metal tube (1), sleeving the insulating ceramic head (2) at the other end on the conducting rod (3), and welding the other end of the innermost metal tube (1) on the insulating ceramic head (2) in a sealing manner;
s4, welding the conducting rods (3) at the two ends with the insulating ceramic heads (2) in a sealing way;
s5, shrinking the innermost layer metal pipe (1);
and S6, sleeving a layer of metal pipe (1) outside the innermost layer of metal pipe (1), shrinking the pipe again, welding the two ends of the metal pipe (1) on the insulating ceramic heads (2) at the two ends in a sealing manner, and repeating the step according to the number of the metal pipes (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617820.0A CN111935859A (en) | 2020-06-30 | 2020-06-30 | Long-service-life composite metal heating pipe and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617820.0A CN111935859A (en) | 2020-06-30 | 2020-06-30 | Long-service-life composite metal heating pipe and machining process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111935859A true CN111935859A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010617820.0A Pending CN111935859A (en) | 2020-06-30 | 2020-06-30 | Long-service-life composite metal heating pipe and machining process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112738932A (en) * | 2021-02-01 | 2021-04-30 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
-
2020
- 2020-06-30 CN CN202010617820.0A patent/CN111935859A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112738932A (en) * | 2021-02-01 | 2021-04-30 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
| CN112738932B (en) * | 2021-02-01 | 2022-09-27 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
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