CN211481494U - Ceramic fiber heating device - Google Patents
Ceramic fiber heating device Download PDFInfo
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- CN211481494U CN211481494U CN201922420099.1U CN201922420099U CN211481494U CN 211481494 U CN211481494 U CN 211481494U CN 201922420099 U CN201922420099 U CN 201922420099U CN 211481494 U CN211481494 U CN 211481494U
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Abstract
The utility model discloses a ceramic fiber heating device, which comprises a ceramic fiber heat preservation layer, wherein the ceramic fiber heat preservation layer is provided with a plurality of first grooves, second grooves and third grooves, the area of the upper part of the cross section of each first groove is smaller than that of the lower part of the cross section of each first groove, the second grooves communicate the adjacent second grooves, one end of each third groove is communicated with the corresponding first groove, and the other end of each third groove extends to the edge of the ceramic fiber heat preservation layer; the heating mechanism is composed of a linear resistance wire and a coil resistance wire, the coil resistance wire is arranged in the first groove, and the linear resistance wire is arranged in the second groove and the third groove. It has good heat dissipation and high thermal efficiency.
Description
Technical Field
The utility model relates to a resistance furnace field, specifically a ceramic fiber heating device.
Background
The resistance furnace is a heating furnace which utilizes current to heat an electric heating element or a heating medium in the furnace through a resistance material, converts electric energy into heat energy and directly or indirectly heats a workpiece in the furnace.
The furnace has the advantages of simple structure, uniform furnace temperature distribution, convenient control, no smoke, no noise and the like, and is widely applied to the industrial field.
An industrial resistance furnace generally comprises a heating element, an insulator, a heat insulation layer, a metal shell, a temperature control system and the like.
The heating element of the resistance furnace is made of various materials, such as metal heating elements and nonmetal heating elements, wherein the metal heating elements are various, such as iron-chromium-aluminum series, nickel-chromium series, platinum, molybdenum, tungsten and the like. The non-metal heating element is silicon carbide, molybdenum silicide, etc.
The heating elements have various shapes and modes, and a mode of directly hanging the heating elements on the inner wall of the furnace through a fixing piece is available; a resistance wire which is coiled into a spring shape or a U-shaped resistance wire belt shape; a rod-shaped heating element fixed and formed by using a high-purity ceramic piece; and a heating element matched with the ceramic fiber heat-insulating layer.
Among them, ceramic fibers are used in combination with resistance wires to make heaters as heating elements of resistance furnaces because of their light weight and heat resistance and heat retention properties, and are widely used in various heating fields such as industrial heat treatment, research and test furnaces.
At present, the ceramic fiber heater has 2 manufacturing modes:
1: ceramic fiber is usually used for forming through vacuum, and a resistance wire is embedded in the ceramic fiber, so that the resistance wire and the ceramic fiber are integrated, and the heater integrates the functions of a heat-insulating material and a heating body. The advantages are that: the heating wire of the heater is firmly fixed, and the heating wire is not easy to deform and short circuit even if softened at high temperature. However, the resistance wire is embedded in the fiber, the heat insulation layers are arranged around and in the coil, and the capacity of radiating heat outwards is poor due to the fact that only about 5% -10% of the resistance wire is exposed, and the heat is accumulated in the heat insulation layers, so that the actual power is lower than the designed power. In addition, the radiation heat transfer is slow, the temperature of the resistance wire in the heat-insulating layer is overhigh and is generally 200-250 ℃ higher than the temperature in the actual furnace, the resistance wire is easy to fuse, and the service life of the heater is also shortened.
2: the other way of the ceramic fiber heater is to open a groove on the ceramic fiber piece and put the resistance wire into the groove to be fixed or unfixed (the hearth part can be unfixed). The open type heater is simple and convenient to manufacture, convenient to replace, good in heat dissipation performance, fast in heat transfer and high in heat efficiency, but the heating wire is not well fixed and is easy to displace, pop out, short circuit and the like. And the heating wire can only be used at the hearth part, the side wall and the top part can not be used, and the heating wire can be deformed and short-circuited due to no fixation after long-time use.
Both of the above two methods have advantages and disadvantages, and both have problems of short service life or low thermal efficiency.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a ceramic fiber heating device, its heat dissipation is good, and the thermal efficiency is high.
In order to achieve the above object, an embodiment of the present application discloses a ceramic fiber heating device, including:
the ceramic fiber heat-insulating layer is provided with a plurality of first grooves, second grooves and third grooves, the area of the upper parts of the cross sections of the first grooves is smaller than that of the lower parts of the first grooves, the second grooves communicate the adjacent second grooves, one ends of the third grooves are communicated with the first grooves, and the other ends of the third grooves extend to the edge of the ceramic fiber heat-insulating layer;
the heating mechanism is composed of a linear resistance wire and a coil resistance wire, the coil resistance wire is arranged in the first groove, and the linear resistance wire is arranged in the second groove and the third groove.
Preferably, the longitudinal section of the first groove is composed of a major arc and two straight lines connected to two ends of the major arc, and the two straight lines are parallel to each other.
Preferably, the distance between one end of the coil resistance wire close to the opening of the first groove and the opening of the first groove is 5 mm.
Preferably, the coil resistance wire is embedded into the inner wall surface of the first groove, and the depth of the coil resistance wire embedded into the inner wall surface of the first groove is 1-3 mm.
Preferably, the coil external diameter of the coil resistance wire is D, the resistance wire diameter D of the coil resistance wire, and the relationship between the coil external diameter and the resistance wire diameter is as follows: d is more than or equal to 6D.
Preferably, the coil pitch of the coil resistance wire is L, the coil diameter of the coil resistance wire is L, and the relationship between the coil pitch and the coil diameter is as follows: l is more than or equal to 2L.
The utility model has the advantages as follows:
1. the ceramic fiber heat-insulating layer is provided with a first groove, the coil resistance wire can be fixed in the ceramic fiber heat-insulating layer by the first groove and is not easy to deform, meanwhile, part of the coil resistance wire is exposed out of the first groove and communicated with the outside but is not contacted with an object to be heated, the heat dissipation is good, the heat conduction is good, and the short circuit is not easy to occur;
2. the coil resistance wire is hollow in the ceramic fiber heat-insulating layer, is not shielded by the ceramic fiber heat-insulating layer, and has good heat dissipation and high heat efficiency;
3. the resistance wire of the coil resistance wire is embedded into the first groove, so that the fixing strength is high, the electric heating wire cannot deform due to softening at high temperature, and the safety and reliability of the electric heating wire are guaranteed;
4. because the heating mechanism is fixed in the ceramic fiber heat-insulating layer through the first groove, the ceramic fiber heating device can be used in any position including a hearth, a furnace wall, a furnace top and the like without being limited to be horizontally placed.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a ceramic fiber heating apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a ceramic fiber heating apparatus according to an embodiment of the present invention;
reference numerals of the above figures:
1. a ceramic fiber heat-insulating layer; 11. a first groove; 12. a second groove; 13. a third groove;
2. a heating mechanism; 21. a linear resistance wire; 22. and a coil resistance wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature.
To achieve the above object, please refer to fig. 1, the present invention provides a ceramic fiber heating device, which comprises a ceramic fiber heat-insulating layer 1 and a heating mechanism 2.
In this embodiment, referring to fig. 2, 4 first grooves 11, 3 second grooves 12 and 2 third grooves 13 are uniformly arranged on the ceramic fiber heat-insulating layer 1, 4 first grooves 11 are arranged in parallel, 3 second grooves 12 communicate four first grooves 11, two second grooves 12 are arranged at the right end of the first grooves 11, one second groove 12 is arranged at the left end of the first grooves 11, 2 third grooves 13 are respectively arranged at the left ends of the front and rear first grooves 11, and the third grooves 13 are communicated with the first grooves 11.
Further, referring to fig. 2, the coil resistance wire 22 of the heating mechanism 2 is disposed in the first groove 11, the linear resistance wire 21 is disposed in the second groove 12 and the third groove 13, and the linear resistance wire 21 is exposed out of the third groove 13.
Further, referring to fig. 1, a cross section of the first groove 11 is formed by splicing a major arc and a rectangle, the length of the rectangle is a diameter of the major arc, the coil resistance wire 22 is arranged at the bottom of the first groove 11 in a penetrating manner, the rectangular opening at the upper part of the first groove 11 enables the coil resistance wire 22 to be partially exposed and fixed, and the resistance wire of the coil resistance wire 22 is embedded into the inner wall surface of the first groove 11.
In the utility model, referring to fig. 2, the distance from the rightmost end of the coil resistance wire 22 to the right side surface of the ceramic fiber heat-insulating layer 1 is 5mm, and the depth of the coil resistance wire 22 embedded into the inner wall of the first groove 11 is 1-3 mm; the surface load density of the coil resistance wire 22 is equal to or less than 2W/m2 of heating wire capacity/wire surface area, and the capacity of the heating mechanism 2 is equal to or less than 20KW/m2 of the embedded heating wire capacity in the unit area of the molded product; the coil external diameter of coil resistance wire 22 is D, the resistance wire diameter D of coil resistance wire 22, the coil external diameter with the relation of resistance wire diameter does: d is more than or equal to 6D; the coil pitch of the coil resistance wire 22 is L, the coil diameter of the coil resistance wire 22 is L, and the relationship between the coil pitch and the coil diameter is as follows: l is more than or equal to 2L.
The coil resistance wire 22 of the heating mechanism 2 can form an internal hollow in the ceramic fiber heat-insulating layer 1, so that the problem of overheating of the resistance wire in the heat-insulating layer is effectively solved, the shape design of the first groove 11 enables the coil resistance wire 22 to be fixed in the ceramic fiber heat-insulating layer 1, meanwhile, the coil resistance wire 22 is partially exposed through the first groove 11 and communicated with the outside, and the heating effect is good.
Use during the ceramic fiber heating device, will need to heat the product and place on ceramic fiber heat preservation 1 is equipped with the face of first recess 11, heating mechanism 2 is fixed in first recess 11, partly follow simultaneously expose in the first recess 11, it is effectual to heat, heating mechanism 2 simultaneously not with the phenomenon of short circuit can not cause in the product contact.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. A ceramic fiber heating device, comprising:
the ceramic fiber heat-insulating layer is provided with a plurality of first grooves, second grooves and third grooves, the area of the upper parts of the cross sections of the first grooves is smaller than that of the lower parts of the first grooves, the second grooves communicate the adjacent second grooves, one ends of the third grooves are communicated with the first grooves, and the other ends of the third grooves extend to the edge of the ceramic fiber heat-insulating layer;
the heating mechanism is composed of a linear resistance wire and a coil resistance wire, the coil resistance wire is arranged in the first groove, and the linear resistance wire is arranged in the second groove and the third groove.
2. A ceramic fiber heating apparatus as claimed in claim 1, wherein a longitudinal section of said first groove is composed of a major arc and two straight lines connected to both ends of said major arc, and said two straight lines are parallel to each other.
3. A ceramic fibre heating device as claimed in claim 1, wherein the distance between the end of the coil resistance wire adjacent the first slot opening and the first slot opening is 5 mm.
4. The ceramic fiber heating device according to claim 1, wherein the coil resistance wire is embedded in an inner wall surface of the first groove, and a depth of the coil resistance wire embedded in the inner wall surface of the first groove is 1-3 mm.
5. The ceramic fiber heating device according to claim 1, wherein the coil outer diameter of the coil resistance wire is D, the resistance wire diameter of the coil resistance wire is D, and the relationship between the coil outer diameter and the resistance wire diameter is: d is more than or equal to 6D.
6. The ceramic fiber heating device according to claim 1, wherein a coil pitch of the coil resistance wire is L, a coil diameter of the coil resistance wire is L, and a relationship between the coil pitch and the coil diameter is: l is more than or equal to 2L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420099.1U CN211481494U (en) | 2019-12-30 | 2019-12-30 | Ceramic fiber heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922420099.1U CN211481494U (en) | 2019-12-30 | 2019-12-30 | Ceramic fiber heating device |
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| Publication Number | Publication Date |
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| CN211481494U true CN211481494U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922420099.1U Active CN211481494U (en) | 2019-12-30 | 2019-12-30 | Ceramic fiber heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383020A (en) * | 2022-09-30 | 2022-11-25 | 郑州轻工业大学 | Heating device of multi-station warm header |
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2019
- 2019-12-30 CN CN201922420099.1U patent/CN211481494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115383020A (en) * | 2022-09-30 | 2022-11-25 | 郑州轻工业大学 | Heating device of multi-station warm header |
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