CN216281513U - Novel heating pipe with sheath - Google Patents
Novel heating pipe with sheath Download PDFInfo
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- CN216281513U CN216281513U CN202122980207.8U CN202122980207U CN216281513U CN 216281513 U CN216281513 U CN 216281513U CN 202122980207 U CN202122980207 U CN 202122980207U CN 216281513 U CN216281513 U CN 216281513U
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- heating pipe
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Abstract
The utility model discloses a novel heating pipe with a sheath, and belongs to the technical field of electric heating. The novel heating pipe with the sheath comprises the sheath, a base and a heating pipe, wherein the sheath and the base are connected in a sealing mode to form a heating shell, the heating pipe is installed inside the heating shell, a heating gap of 0.5 mm-1.5 mm is formed between the inner wall of the sheath and the outer wall of the heating pipe, compared with the prior art, the surface of the high-temperature heating pipe is not in direct contact with carbon element, leakage current between the heating pipe and equipment is greatly reduced, normal operation of the equipment is guaranteed, in addition, the shell formed by the sheath and the base can protect the heating pipe from being corroded by sulfur dioxide, grease and the like, and long-time, stable and reliable work of the heating pipe is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of electric heating, and particularly relates to a novel heating pipe with a sheath.
Background
At present, igniters are roughly divided into two categories, one category is an alloy electric heating wire with wide application, the metal sleeve is sleeved outside the alloy electric heating wire, and when the ignition rod works in an environment with high temperature and high humidity, because a heating element is directly contacted with a combustible, the surface of the heating element is easily oxidized and corroded, and the service life of the heating element is short. The other is ceramic igniting rod, its advantages are saving energy and quick heating. When the heating pipe is used, the heating surface is directly exposed outside, and when the heating pipe is ignited, the heating surface is directly contacted with biological particles and burns residues, so that the following two defects exist:
firstly, when the ceramic is electrified and heated, because the insulation resistance of the ceramic is reduced at high temperature, the thermal conductivity is reduced, carbon elements generated by exposed heating pipes, burning biological particles and other fuels are locally broken down and discharged at high temperature, so that the surface of the ceramic is locally damaged, a heating body fails, the requirement of an equipment leakage protection switch cannot be met, and the equipment cannot normally work.
Secondly, the heating pipe surface exposes in the air, contains sulphur, grease etc. in the fuel such as biological particle, charcoal, burning process produced sulfur dioxide, has stronger corrosion to the heating pipe surface of high temperature to the impurity that contains in the fuel, the composition is mostly silica, can't burn, and easy coking such as sulphur, grease adheres to the heating pipe surface, uses for a long time, can make the heating pipe surface corrosion infiltration directly damage the heat-generating body, makes the heating pipe burn out.
SUMMERY OF THE UTILITY MODEL
In addition, a shell formed by the sheath and the base can protect the heating pipe from being corroded by sulfur dioxide, grease and the like, and the heating pipe can work stably and reliably for a long time.
The utility model solves the problems through the following technical means:
the utility model provides a novel take sheath heating pipe includes sheath, base and heating pipe, sheath and base sealing connection constitute heating shell, the heating pipe is installed inside heating shell, wherein: the sheath consists of a sheath body and an inner sheath platform positioned at the tail end of the sheath body; an installation cavity for fixing the heating tube is arranged in the base, an outer sleeve platform matched and connected with the inner sleeve platform is arranged at the top of the installation cavity, and a wiring hole is formed in the bottom of the installation cavity; and a lead wire of the heating pipe penetrates through the wiring hole to be connected with an external power supply.
Preferably, a heating gap is arranged between the inner wall of the sheath and the outer wall of the heating pipe, and the range of the heating gap is 0.5mm to 1.5 mm.
Preferably, the thickness of the sheath is 1mm to 2 mm.
Preferably, the cross-sectional shape of the sheath includes a circular structure, an elliptical structure, a triangular structure, a rectangular structure or a diamond structure.
Preferably, the sheath and the base are made of alumina, zirconia, aluminum nitride, silicon nitride or corundum materials.
Preferably, the heating tube comprises a ceramic tube carrier, a printed substrate and a heating printed circuit, wherein:
the printing matrix is tightly wrapped on the outer wall of the ceramic tube carrier; a heating printed circuit is arranged on the inner surface of the printing substrate; the heating printed circuit comprises an inner electrode plate and a non-inductive heating resistance wire, wherein the inner electrode plate is connected with the connecting end of the non-inductive heating resistance wire; the outer surface of the printing substrate is correspondingly provided with two outer electrode plates, the outer parts of the outer electrode plates are connected with leads through a brazing process, and the inner parts of the outer electrode plates are connected with the inner electrode plates through metal conductor slurry.
Preferably, the non-inductive heating resistance wire adopts the technical scheme of parallel wiring and arc-shaped connection at the tail end.
Preferably, the inner electrode plates comprise a first inner electrode plate and a second inner electrode plate, and the first inner electrode plate and the second inner electrode plate are respectively connected to two ends of the non-inductive heating resistance wire.
The novel heating pipe with the sheath has the following beneficial effects:
(1) the novel sheath and base structure is adopted, the technical problems of high-temperature local breakdown discharge and surface corrosion resistance enhancement of the existing heating pipe are solved, the surface of the high-temperature heating pipe is not in direct contact with carbon element any more, leakage current between the heating pipe and equipment is greatly reduced, normal operation of the equipment is guaranteed, in addition, a shell formed by the sheath and the base can protect the heating pipe from being corroded by sulfur dioxide, grease and the like, and long-time, stable and reliable operation of the heating pipe is guaranteed.
(2) The sheath and the base are connected by a sleeving method and are bonded by high-temperature ceramic glue, so that the sealing property is obviously improved, the service life is obviously prolonged, and the outdoor environment is heated, and the waterproof and dustproof characteristics are realized.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic view of the sheath construction of the present invention;
FIG. 4 is a schematic view of the base structure of the present invention;
FIG. 5 is a schematic view of the internal structure of the heating tube of the present invention;
FIG. 6 is a schematic view of the external structure of the heating tube of the present invention;
FIG. 7 is a schematic view of a ceramic tube carrier structure of the heating tube of the present invention;
FIG. 8 is a schematic diagram of the routing of the non-inductive heating resistor of the present invention.
The heating device comprises a sheath 1, a sheath body 101, a sheath body 102, an inner sleeve platform 2, a base 201, an installation cavity 202, an outer sleeve platform 203, a wiring hole 203, a heating pipe 3, a ceramic pipe carrier 301, a printing matrix 302, a heating printed circuit 303, an outer electrode plate 304, an inner electrode plate 305, a non-inductive heating resistance wire 306, a first inner electrode plate 307, a second inner electrode plate 308 and a lead 4.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The present invention will be described in detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1 to 4, the novel heating pipe with the sheath includes a sheath 1, a base 2 and a heating pipe 3, the sheath 1 and the base 2 are hermetically connected to form a heating shell, the heating pipe 3 is installed inside the heating shell, wherein: the sheath 1 consists of a sheath body 101 and an inner sheath platform 102 positioned at the tail end of the sheath body 101; an installation cavity 201 for fixing the heating pipe 3 is arranged in the base 2, an outer sleeve platform 202 matched and connected with the inner sleeve platform 102 is arranged at the top of the installation cavity 201, and a wiring hole 203 is formed in the bottom of the installation cavity 201; the lead wire 4 of the heating tube 3 passes through the wire-passing hole 203 and is connected with an external power supply.
It should be noted that the cross-sectional shape of the sheath 1 includes a circular structure, an elliptical structure, a triangular structure, a rectangular structure or a rhombic structure, and the like, for example: when the cross-sectional shape of the sheath 1 is a triangular structure, the inner sleeve stage 102 and the outer sleeve stage 202 corresponding thereto also adopt a triangular prism structure.
During specific application, be provided with the heating clearance between 1 inner wall of sheath and the 3 outer walls of heating pipe, the scope in heating clearance is 0.5mm to 1.5mm, and the thickness of sheath 1 is 1mm to 2mm, and the heating clearance too closely receives to make heating pipe or sleeve pipe fracture because of stress such as expend with heat and contract with cold easily, and too far heat-conduction is slow, is unfavorable for the surface to generate heat.
In this embodiment, the sheath 1 and the base 2 are made of alumina, zirconia, aluminum nitride, silicon nitride or corundum, and the alumina is selected to be optimal, so that the sheath has the characteristics of good insulating property, high temperature resistance and good thermal conductivity.
During actual work, after the heating pipe 3 generates heat, the temperature is conducted to the sheath 1 through air in a gap between the heating pipe 3 and the sheath 1, and the sheath 1 generates heat to play a heating and igniting role. The heating pipe 3 is completely encapsulated by the sheath 1 and the base 2, so that the heating pipe 3 is prevented from contacting with external combustion objects and being corroded; and secondly, the ceramic sheath is added, so that the insulating property of the heating pipe is improved, the heating pipe is greatly prevented from being damaged in a high-temperature environment, and the product performance is improved.
Example two
Based on the first embodiment, the manufacturing method of the heating pipe with the sheath is characterized by comprising the following manufacturing steps:
1, manufacturing a sheath and a base: manufacturing the sheath and the base by adopting a hot-press casting or isostatic pressing process, and finely grinding the outer surfaces of the sheath and the base after the manufacture is finished;
2, manufacturing a heating pipe: preparing an electric metal slurry containing rare and precious low-resistance metal materials, wherein the viscosity range of the conductive metal slurry is 20000 to 50000mPa, printing a heating printed circuit on a printing substrate by using a machine printing method through the fully-stirred electric metal slurry, tightly wrapping the printing substrate on a ceramic tube carrier after printing and arranging an electrode plate, and sintering the ceramic tube carrier, the printing substrate and the heating printed circuit by using a reducing atmosphere tunnel type sintering furnace, wherein the sintering temperature is controlled between 1600 ℃ and 1650 ℃, and the temperature needs to be slowly and uniformly increased and decreased;
and 3, matching installation: fixing the bottom of the heating pipe in the mounting cavity of the base, leading out the lead wire from the wire feeding hole, mounting the inner sleeve table of the sheath in the outer sleeve table of the base, connecting the sheath and the base by adopting a sleeving connection method, and bonding the sheath and the base by using high-temperature ceramic glue.
It should be noted that the hot-press casting process adopts alpha alumina to undergo two high-temperature calcinations, the secondary calcination temperature is 1650-. The preparation method comprises the steps of material selection, grinding, proportioning, hot-press casting, low-temperature wax removal and high-temperature sintering. The ceramic parameter requirements are as follows: the direct current breakdown voltage strength is more than or equal to 15KV/mm, the water absorption rate is less than 0.01%, the hardness is more than or equal to 80HRA, and the volume resistance is more than 1012Omega, coefficient of thermal expansion 6-10 x 10-6/° C, the dielectric constant is 6-10 epsilon 1MHz, and the flexural strength is more than or equal to 240 MPa.
It should be noted that, in the isostatic pressing process: the product is made by isostatic pressing process, wherein the alumina granulated powder is placed in a closed container filled with liquid, and the product density is increased and the required shape is obtained by applying equal pressure to each surface of the alumina granulated powder under high pressure environment. And then polishing, high-temperature calcination and polishing to finally finish the accurate size of the required product. The ceramic parameter requirements are as follows: vickers hardness: 1200-1300HV, fracture toughness: 4.6-4.8 Mpa.m1/2 The breaking strength is as follows: 350-400 Mpa and 70-75% thermal shock resistance.
EXAMPLE III
As shown in fig. 5 to 8, the heating tube 3 includes a ceramic tube carrier 301, a printed substrate 302, and a heat-generating printed wiring 303, in which: the printing matrix 302 is tightly wrapped on the outer wall of the ceramic tube carrier 301; a heat-generating printed wiring 303 is provided on the inner surface of the printed base 302; the heating printed circuit 303 comprises an inner electrode piece 305 and a non-inductive heating resistance line 306, wherein the inner electrode piece 305 is connected with the connecting end of the non-inductive heating resistance line 306; two outer electrode plates 304 are correspondingly arranged on the outer surface of the printed substrate 302, the outer parts of the outer electrode plates 304 are connected with the lead wires 4, and the inner parts of the outer electrode plates 304 are connected with the inner electrode plates 305 through metal conductor paste.
Specifically, a through hole is formed between the outer electrode plate 304 and the inner electrode plate 305, and metal conductor slurry is filled in the through hole and is used for communicating with an electrode plate of a power supply; the ceramic tube carrier 301 and the printing matrix 302 have the same size, and are fused into a whole through high-pressure pressing and high-temperature sintering, the printing matrix 302 generally adopts a tape casting, the ceramic tube carrier 301 generally adopts 92% -96% of alumina, and in addition, the resistor and the electrode adopt a printing process.
Example four
In fig. 8, the non-inductive heating resistance wire 306 is wired in parallel, the main body of the non-inductive heating resistance wire 306 is distributed in an equidistant S-shape, and two ends of the non-inductive heating resistance wire 306 are respectively connected with the first inner electrode plate 307 and the second inner electrode plate 308. Specifically, the first inner electrode plate 307 is connected to the top end of the non-inductive heating resistance line 306 through two resistance lines, and the second inner electrode plate 308 is connected to the bottom end of the non-inductive heating resistance line 306 through two resistance lines.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a novel take sheath heating pipe, its characterized in that, includes sheath (1), base (2) and heating pipe (3), and sheath (1) and base (2) sealing connection constitute heating shell, and inside heating shell was installed in heating shell heating pipe (3), wherein:
the sheath (1) consists of a sheath body (101) and an inner sheath platform (102) positioned at the tail end of the sheath body (101);
an installation cavity (201) for fixing the heating pipe (3) is arranged in the base (2), an outer sleeve table (202) matched and connected with the inner sleeve table (102) is arranged at the top of the installation cavity (201), and a wiring hole (203) is formed in the bottom of the installation cavity (201);
and a lead wire (4) of the heating pipe (3) penetrates through the wiring hole (203) to be connected with an external power supply.
2. The novel sheathed heating tube according to claim 1, characterized in that a heating gap is provided between the inner wall of the sheath (1) and the outer wall of the heating tube (3), the heating gap ranging from 0.5mm to 1.5 mm.
3. The novel sheathed heating tube according to claim 1, characterized in that the sheath (1) has a thickness of 1mm to 2 mm.
4. The novel sheathed heating tube according to claim 1, characterized in that the cross-sectional shape of the sheath (1) comprises a circular structure, an elliptical structure, a triangular structure, a rectangular structure or a diamond structure.
5. The new sheathed heating tube according to claim 1, characterized in that the sheath (1) and the base (2) are made of alumina, zirconia, aluminum nitride, silicon nitride or corundum material.
6. The novel sheathed heating tube according to claim 1, characterized in that the heating tube (3) comprises a ceramic tube carrier (301), a printed substrate (302) and a heat generating printed wiring (303), wherein:
the printing matrix (302) is tightly wrapped on the outer wall of the ceramic tube carrier (301);
a heating printed circuit (303) is arranged on the inner surface of the printing substrate (302);
the heating printed circuit (303) comprises an inner electrode plate (305) and a non-inductive heating resistance wire (306), wherein the inner electrode plate (305) is connected with the connecting end of the non-inductive heating resistance wire (306);
the outer surface of the printing base body (302) is correspondingly provided with two outer electrode plates (304), the outer parts of the outer electrode plates (304) are connected with a lead (4) through a brazing process, and the inner parts of the outer electrode plates (304) are connected with an inner electrode plate (305) through metal conductor slurry.
7. The novel sheathed heating tube according to claim 6, characterized in that the non-inductive heating resistance wire (306) adopts a technical scheme of parallel wiring and arc-shaped connection at the tail end.
8. The novel sheathed heating tube of claim 6, wherein the inner electrode sheet (305) comprises a first inner electrode sheet (307) and a second inner electrode sheet (308), and the first inner electrode sheet (307) and the second inner electrode sheet (308) are respectively connected with two ends of the non-inductive heating resistance wire (306).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122980207.8U CN216281513U (en) | 2021-11-30 | 2021-11-30 | Novel heating pipe with sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122980207.8U CN216281513U (en) | 2021-11-30 | 2021-11-30 | Novel heating pipe with sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216281513U true CN216281513U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122980207.8U Active CN216281513U (en) | 2021-11-30 | 2021-11-30 | Novel heating pipe with sheath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216281513U (en) |
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2021
- 2021-11-30 CN CN202122980207.8U patent/CN216281513U/en active Active
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