CN114151968A - Heating pipe with insulating coating and processing method of insulating coating - Google Patents
Heating pipe with insulating coating and processing method of insulating coating Download PDFInfo
- Publication number
- CN114151968A CN114151968A CN202010936755.8A CN202010936755A CN114151968A CN 114151968 A CN114151968 A CN 114151968A CN 202010936755 A CN202010936755 A CN 202010936755A CN 114151968 A CN114151968 A CN 114151968A
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- Prior art keywords
- insulating
- insulating coating
- temperature
- heat
- coating
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/29—Mixtures
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/119—Deposition methods from solutions or suspensions by printing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/92—Electrically insulating materials
Abstract
The invention relates to a heating pipe with an insulating coating and a processing method of the insulating coating, and the heating pipe comprises a heat conduction insulating pipe, wherein the outer sides of the upper end and the lower end of the heat conduction insulating pipe are respectively sleeved and fixed with a silver electrode, the heat conduction insulating pipe is coated with an electrothermal film, the electrothermal film is arranged between the two silver electrodes, the edges of the upper side and the lower side of the electrothermal film are respectively communicated with the two silver electrodes, the outer parts of the electrothermal film and the two silver electrodes are also coated with the insulating coating, and the insulating coating is formed by coating and sintering a mixture of low-temperature glass powder, alumina powder, acidic aluminum phosphate and water glass; the invention prolongs the service life of the electrothermal film, greatly improves the thermal shock stability of the electrothermal film, and plays a role in heat preservation and heat insulation to improve the heat efficiency; in addition, the temperature controller can be directly attached to the insulating coating to sense temperature change in a short distance, so that the response time of the temperature controller is shortened to eliminate potential safety hazards.
Description
Technical Field
The invention relates to a heating pipe with an insulating coating and a processing method of the insulating coating.
Background
The quick heating type water heater mostly adopts a heating pipe made of ceramic or quartz glass as a heat source, and the heating pipe made of ceramic or quartz glass heats water in the heating pipe by utilizing the principle that an electric heating film coated on the surface of a pipe body generates heat after being electrified; an electrothermal film on the existing heating pipe is directly contacted with the outside, and water vapor and dust in the air are easy to oxidize the electrothermal film, so that the electrothermal film is corroded, and the service life of the electrothermal film is short; moreover, once the environmental temperature changes rapidly, the electric heating film is easy to crack, so that the thermal shock stability is poor, and meanwhile, a large part of heat generated by the electric heating film is lost outwards, so that the thermal efficiency is low; in addition, because electric heat membrane circular telegram back is electrified, because unable direct at electric heat membrane surface mounting temperature controller, can only install the temperature controller to the position of keeping away from the electric heat membrane, cause the unable surface temperature who closely responds to the electric heat membrane of temperature controller, the response time that leads to the temperature controller is longer, in case the condition of intraductal anhydrous dry combustion method of appearing, the temperature controller just can't sense the temperature variation fast, has the potential safety hazard, has to be treated in further improvement.
Disclosure of Invention
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a heating tube with an insulating coating and a processing method of the insulating coating, wherein the heating tube with the insulating coating and the processing method of the insulating coating prolong the service life of an electrothermal film, greatly improve the thermal shock stability of the electrothermal film, simultaneously improve the thermal efficiency and eliminate the potential safety hazard.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a heating pipe with insulating coating, its characterized in that, includes the heat conduction insulating tube, the upper and lower both ends outside of heat conduction insulating tube all overlaps and establishes and is fixed with a silver electrode, the outer coating of heat conduction insulating tube has the electric heat membrane, the electric heat membrane is located between two silver electrodes, the upper and lower both sides edge of electric heat membrane switches on each other with two silver electrodes respectively, the outside of electric heat membrane and two silver electrodes has still coated insulating coating, insulating coating's thickness is 15 ~ 25um, insulating coating is formed by the mixture coating and the sintering of low temperature glass powder, alumina powder, acid aluminium phosphate and water glass.
Preferably, the material of the heat conducting insulating tube is ceramic or quartz glass.
Preferably, the processing method of the insulating coating of the heating pipe is characterized by comprising the following steps:
(1) taking low-temperature glass powder and alumina powder according to a proportion, and fully mixing to form a powder mixture;
(2) adding the powder mixture to a ball mill for ball milling to form a ball milled mixture;
(3) adding the ball-milled mixture and the acidic aluminum phosphate into water glass according to the proportion, and uniformly stirring to prepare slurry;
(4) silk-screen printing the slurry on the surface of the heat-conducting insulating tube by means of a screen plate to form an insulating slurry layer;
(5) and putting the heat-conducting insulating pipe with the insulating paste layer printed on the screen into a high-temperature tunnel kiln, and sequentially carrying out preheating, medium-temperature sintering, high-temperature sintering and cooling on the heat-conducting insulating pipe for forming.
Preferably, the mass percent of the low-temperature glass powder in the step (1) is 94-96%, and the mass percent of the alumina powder is 4-6%.
Preferably, the particle size of the ball milled mixture in step (2) is less than 50 um.
Preferably, the volume percentages of the ball-milling mixture, the acidic aluminum phosphate and the water glass in the step (3) are 90%, 2% and 8% in sequence.
Preferably, the mesh plate in the step (4) has a fineness of 180 to 250 meshes.
Preferably, the thickness of the insulating paste layer in the step (4) is 25-35 um.
Preferably, the preheating, medium-temperature sintering and temperature-reducing cooling in step (5) are all 3 minutes, and the high-temperature sintering time is 6 minutes.
Preferably, the temperature of the medium-temperature sintering in the step (5) is 200 ℃, and the temperature of the high-temperature sintering is 850 ℃.
Compared with the prior art, the invention has the advantages that: the insulating coating can isolate the electric heating film from air, so that water vapor and dust in the air can not contact the surface of the electric heating film, and the surface of the electric heating film is prevented from being oxidized, thereby prolonging the service life of the electric heating film; the thermal expansion coefficient of the insulating coating is low, so that the electric heating film can be effectively deformed and buffered, and can not crack even if the environmental temperature is changed rapidly, so that the thermal shock stability of the electric heating film is greatly improved, the heat generated by the electric heating film can be effectively prevented from being lost outwards, and the heat preservation and insulation effects are realized so as to improve the heat efficiency; in addition, the temperature controller can be directly attached to the insulating coating to sense temperature change in a short distance, so that the response time of the temperature controller is shortened to eliminate potential safety hazards.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a sectional structural view at the silver electrode of the present invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
As shown in figures 1-2, a heating pipe with insulating coating, including heat conduction insulating tube 1, the upper and lower both ends outside of heat conduction insulating tube 1 all overlaps and is established and is fixed with a silver electrode 2, the outer coating of heat conduction insulating tube 1 has electric heat membrane 3, electric heat membrane 3 locates between two silver electrodes 2, the upper and lower both sides edge of electric heat membrane 3 switches on each other with two silver electrodes 2 respectively, electric heat membrane 3 and two silver electrodes 2's outside still coating have insulating coating 4, insulating coating 4's thickness is 15 ~ 25um, heat conduction insulating tube 1's material is pottery or quartz glass.
The insulating coating 4 is formed by coating and sintering a mixture of low-temperature glass powder, alumina powder, acidic aluminum phosphate and water glass.
When the water heater is used, the positive pole and the negative pole of a power supply are respectively connected with the two silver electrodes 2, so that the upper side and the lower side of the electric heating film 3 are electrified, the electric heating film 3 generates heat after being electrified and conducts the heat to the heat-conducting insulating tube 1, and when water flows pass through the heat-conducting insulating tube 1, the heat on the heat-conducting insulating tube 1 is conducted to the water flows, so that water is heated; the insulating coating 4 isolates the electrothermal film 3 from air, so that the surface of the electrothermal film 3 is not easy to oxidize, and the service life of the electrothermal film 3 is further prolonged; the thermal expansion coefficient of the insulating coating 4 is low, so that the thermal shock stability of the electrothermal film 3 is improved, the heat preservation and insulation effects can be effectively achieved, and the thermal efficiency is improved; in addition, the temperature controller can directly laminate on insulating coating 4, and then closely respond to the temperature variation to shorten the response time of temperature controller, eliminate the potential safety hazard.
The processing method of the insulating coating 4 is as follows:
(1) taking low-temperature glass powder and alumina powder according to a proportion, and fully mixing to form a powder mixture; the mass percent of the low-temperature glass powder is 94-96%, and the mass percent of the alumina powder is 4-6%.
(2) The powder mixture is added to a ball mill and ball milled to form a ball milled mixture having a particle size of less than 50 um.
(3) Adding the ball-milled mixture and the acidic aluminum phosphate into water glass according to the proportion, and uniformly stirring to prepare slurry; the volume percentages of the ball-milling mixture, the acidic aluminum phosphate and the water glass are 90%, 2% and 8% in sequence.
(4) Silk-screening the slurry on the surface of the heat conduction insulating tube 1 by using a screen plate with the fineness of 180-250 meshes to form an insulating slurry layer; the thickness of the insulating slurry layer is 25-35 um.
(5) Placing the heat-conducting insulating tube 1 with the insulating paste layer printed on the screen into a high-temperature tunnel kiln, and sequentially carrying out preheating, medium-temperature sintering, high-temperature sintering and cooling and then forming; the preheating, medium-temperature sintering and cooling time is 3 minutes, and the high-temperature sintering time is 6 minutes; the temperature of medium-temperature sintering is 200 ℃; the temperature of the high-temperature sintering is 850 ℃.
The insulating coating 4 can isolate the electrothermal film 3 from air, so that water vapor and dust in the air can not contact the surface of the electrothermal film 3, and further the surface of the electrothermal film 3 is prevented from being oxidized, thereby prolonging the service life of the electrothermal film 3; the thermal expansion coefficient of the insulating coating 4 is low, so that the electrothermal film 3 can be effectively deformed and buffered, and the electrothermal film can not crack even if the environmental temperature changes rapidly, so that the thermal shock stability of the electrothermal film 3 is greatly improved, the heat generated by the electrothermal film 3 can be effectively prevented from being lost outwards, and the heat preservation and insulation effects are achieved so as to improve the heat efficiency; in addition, the temperature controller can be directly attached to the insulating coating 4 to sense temperature change in a short distance, so that the response time of the temperature controller is shortened to eliminate potential safety hazards.
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 skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a heating pipe with insulating coating, its characterized in that, includes the heat conduction insulating tube, the upper and lower both ends outside of heat conduction insulating tube all overlaps and establishes and is fixed with a silver electrode, the outer coating of heat conduction insulating tube has the electric heat membrane, the electric heat membrane is located between two silver electrodes, the upper and lower both sides edge of electric heat membrane switches on each other with two silver electrodes respectively, the outside of electric heat membrane and two silver electrodes has still coated insulating coating, insulating coating's thickness is 15 ~ 25um, insulating coating is formed by the mixture coating and the sintering of low temperature glass powder, alumina powder, acid aluminium phosphate and water glass.
2. The heating tube with insulating coating according to claim 1, characterized in that the material of the heat conducting insulating tube is ceramic or quartz glass.
3. The method for processing the insulating coating of the heating tube according to claim 1, characterized by comprising the following steps:
(1) taking low-temperature glass powder and alumina powder according to a proportion, and fully mixing to form a powder mixture;
(2) adding the powder mixture to a ball mill for ball milling to form a ball milled mixture;
(3) adding the ball-milled mixture and the acidic aluminum phosphate into water glass according to the proportion, and uniformly stirring to prepare slurry;
(4) silk-screen printing the slurry on the surface of the heat-conducting insulating tube by means of a screen plate to form an insulating slurry layer;
(5) and putting the heat-conducting insulating pipe with the insulating paste layer printed on the screen into a high-temperature tunnel kiln, and sequentially carrying out preheating, medium-temperature sintering, high-temperature sintering and cooling on the heat-conducting insulating pipe for forming.
4. The method for processing an insulating coating according to claim 3, wherein the low-temperature glass powder in the step (1) is 94-96% by mass, and the alumina powder is 4-6% by mass.
5. The method of claim 3, wherein the ball milled mixture of step (2) has a particle size of less than 50 um.
6. The method for processing the insulation coating according to claim 3, wherein the ball-milled mixture, the acidic aluminum phosphate and the water glass in the step (3) are sequentially 90%, 2% and 8% in volume percentage.
7. The process for producing an insulating coating according to claim 3, wherein the mesh sheet in the step (4) has a fineness of 180 to 250 mesh.
8. The method for processing an insulation coating according to claim 3, wherein the thickness of the insulation paste layer in the step (4) is 25-35 um.
9. The method for processing the insulation coating according to claim 3, wherein the preheating, the medium-temperature sintering and the cooling in step (5) are all performed for 3 minutes, and the high-temperature sintering is performed for 6 minutes.
10. The method for processing the insulation coating according to claim 3, wherein the temperature of the medium-temperature sintering in the step (5) is 200 ℃ and the temperature of the high-temperature sintering is 850 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936755.8A CN114151968A (en) | 2020-09-08 | 2020-09-08 | Heating pipe with insulating coating and processing method of insulating coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010936755.8A CN114151968A (en) | 2020-09-08 | 2020-09-08 | Heating pipe with insulating coating and processing method of insulating coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151968A true CN114151968A (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010936755.8A Pending CN114151968A (en) | 2020-09-08 | 2020-09-08 | Heating pipe with insulating coating and processing method of insulating coating |
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| Country | Link |
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| CN (1) | CN114151968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114630458A (en) * | 2022-03-14 | 2022-06-14 | 福建晶烯新材料科技有限公司 | Manufacturing process of transparent semiconductor heating toughened glass |
-
2020
- 2020-09-08 CN CN202010936755.8A patent/CN114151968A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114630458A (en) * | 2022-03-14 | 2022-06-14 | 福建晶烯新材料科技有限公司 | Manufacturing process of transparent semiconductor heating toughened glass |
| CN114630458B (en) * | 2022-03-14 | 2023-10-27 | 福建晶烯新材料科技有限公司 | Manufacturing process of transparent semiconductor heating toughened glass |
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