CN107087317B - Magnesium oxide insulating heater - Google Patents
Magnesium oxide insulating heater Download PDFInfo
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- CN107087317B CN107087317B CN201710308192.6A CN201710308192A CN107087317B CN 107087317 B CN107087317 B CN 107087317B CN 201710308192 A CN201710308192 A CN 201710308192A CN 107087317 B CN107087317 B CN 107087317B
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- electric heating
- heater
- electric
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- magnesium oxide
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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
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
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Abstract
A magnesium oxide insulated heater belongs to the technical field of electric devices. The electric heating device comprises a pair of heater bodies which are matched face to face and form a circular heating cavity which is communicated up and down after being matched, electric heating grooves are respectively arranged on one side of the pair of heater bodies back to the circular heating cavity and at the positions corresponding to each other, magnesium oxide insulation heat conduction filling layers are arranged in the electric heating grooves, electric heating wires are arranged in the magnesium oxide insulation heat conduction filling layers, the upper electric heating groove and the lower electric heating groove which are adjacent are communicated through electric heating wire transition holes which are arranged at one end of the bottom wall of the electric heating groove, the electric heating wires arranged in the magnesium oxide insulation heat conduction filling layers of the upper electric heating groove and the lower electric heating groove which are adjacent are communicated through the electric heating wire transition holes to form an electric loop, and sealing strips are sealed at the notch parts of one side of the electric heating grooves which faces outwards. Can be well matched with a tubular or cylindrical heated body; the heat generated by the electric heating wire can be quickly transferred to the heated body; the replacement is convenient, and the continuous use of the heater body is guaranteed; the structure is simple.
Description
Technical Field
The invention belongs to the technical field of electric devices, and particularly relates to a magnesium oxide insulating heater.
Background
Compared with the insulating heating device which takes mica and ceramic as insulating heat transfer media, the magnesium oxide insulating heating device has the advantages of high heat transfer speed, excellent high temperature resistance degree (over 760 ℃), high power density (15 w/cm) 2 ) And the like.
Technical information on magnesia insulated heaters, such as CN104378856A (metal magnesia far infrared radiation heater), CN2631182Y (magnesia insulated heating element), CN102905409A (magnesia insulated heating ring) and CN105722259A (a metal magnesia electric tube with fault lamp device), etc., can be found in published chinese patent documents. However, no magnesia insulated heaters are known for the cylindrical or cylindrical structure, which is well received in the aforementioned industries as plastic, chemical fiber and rubber. Taking an extrusion screw of a plastic extruder as an example, the cylindrical magnesium oxide insulating heater is arranged outside the screw cylinder, so that a uniform heating effect can be obtained. In view of the applicant's advantageous design, the technical solutions described below have been created in this context.
Disclosure of Invention
The invention aims to provide a magnesium oxide insulated heater which is favorable for being well matched with a tubular or cylindrical heated body, is favorable for obviously improving the heating speed of the heated body, is favorable for quickly transferring heat generated by an electric heating wire to the heated body, is convenient to meet the convenient requirement of maintenance and replacement, is favorable for convenient manufacture, has a simple structure and is economical and cheap.
The invention aims to accomplish the task in such a way that a magnesium oxide insulating heater comprises a pair of heater bodies which are matched face to face and form a circular heating cavity which is penetrated up and down after being matched, electric heating grooves are respectively arranged at the positions, corresponding to each other, of one side of each heater body, which is back to the circular heating cavity, up and down at intervals, magnesium oxide insulating and heat-conducting filling layers are arranged in the electric heating grooves, electric heating wires are laid in the magnesium oxide insulating and heat-conducting filling layers, the upper and lower adjacent electric heating grooves are penetrated through electric heating wire transition holes which are arranged at one ends of the bottom walls of the electric heating grooves, the electric heating wires laid in the magnesium oxide insulating and heat-conducting filling layers of the upper and lower adjacent electric heating grooves are communicated through the electric heating wire transition holes to form an electric loop, and a sealing strip is fixedly sealed at the notch part at one side, facing outwards, of the electric heating grooves.
In a specific embodiment of the present invention, an electric heating wire first end lead-out hole is formed at an end of the sealing strip corresponding to an uppermost one of the electric heating grooves, and an electric heating wire second end lead-out hole is formed at an end of the sealing strip corresponding to a lowermost one of the electric heating grooves and at a position corresponding to the electric heating wire first end lead-out hole, the first end of the electric heating wire being led out of the electric heating groove through the electric heating wire first end lead-out hole, and the second end of the electric heating wire being led out of the electric heating groove through the electric heating wire second end lead-out hole.
In another specific embodiment of the invention, the sealing strip is an aluminum strip and is sealed with the notch part of the side, facing outwards, of the electric heating groove by means of spot welding.
In yet another specific embodiment of the present invention, the depth of the electric heating groove is four-fifths or two-thirds of the thickness of the heater body.
In yet another embodiment of the present invention, the heater body is copper or aluminum.
In a further specific embodiment of the present invention, the electric heating wire is laid in a bent state in the magnesium oxide insulating and heat conducting filling layer.
In a more specific embodiment of the present invention, the bending is a U-shaped and n-shaped cyclic alternating bending.
The technical scheme provided by the invention has the technical effects that: the heater bodies are matched with each other in a face-to-face manner, and a circular heating cavity which is penetrated up and down is formed after the heater bodies are matched, so that the heater bodies can be well matched with a circular tubular or cylindrical heated body; because the magnesium oxide insulating heat-conducting filling layer is adopted, the heat generated by the electric heating wire can be quickly transferred to the heated body; when the electric heating wire is damaged, the electric heating wire can be replaced only by removing the sealing strip, so that the requirement of convenient replacement can be met, and the continuous use of the heater body can be ensured, thereby saving resources; due to the simple structure, the structure can be conveniently manufactured and is economical and cheap.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention.
Fig. 2 is a schematic view illustrating an application of the present invention.
Detailed Description
Example (b):
referring to fig. 1, there is shown a pair of heater bodies 1 which are fitted to face each other and form a circular heating cavity 11 penetrating up and down after fitting, electric heating grooves 12 are formed at intervals from top to bottom (both from top to bottom) at positions where the pair of heater bodies 1 are opposite to the circular heating cavity 11, a magnesium oxide insulating and heat conducting filling layer 121 is provided in each electric heating groove 12, an electric heating wire 122 is laid in the magnesium oxide insulating and heat conducting filling layer 121, electric heating wire transition holes 1231 provided at one end of a groove bottom wall 123 of the electric heating groove 12 are penetrated in two adjacent electric heating grooves 12, the electric heating wires 122 laid in the magnesium oxide insulating and heat conducting filling layers 121 of the two adjacent electric heating grooves 12 are communicated through the electric transition heating wire holes 1231 to form an electric circuit (i.e., "electric heating circuit"), and a sealing tape 124 is sealed and fixed at a notch portion of one side of the electric heating groove 12 facing outward.
As shown in fig. 1, an electric-heating-wire first-end drawing hole 1241 is opened at an end of the sealing tape 124 corresponding to the uppermost one of the electric heating tanks 12, an electric-heating-wire second-end drawing hole 1242 is opened at an end of the sealing tape 124 corresponding to the lowermost one of the electric heating tanks 12 and at a position corresponding to the electric-heating-wire first-end drawing hole 1241, a first end 1221 of the electric heating wire 122 is electrically connected to a power supply circuit by being drawn out of the electric heating tank 12 through the electric-heating-wire first-end drawing hole 1241, and a second end 1222 of the electric heating wire 122 is also electrically connected to the power supply circuit by being drawn out of the electric heating tank 12 through the electric-heating-wire second-end drawing hole 1242.
In the present embodiment, although the number of the electric heating grooves 12 is shown as four, it is apparent that the number is not to be construed as a limitation of the present invention, for example, when the height of the heater body 1 is changed, the number of the electric heating grooves 12 is also changed accordingly.
In this embodiment, the sealing strip 124 is an aluminum strip and is sealed with the notch portion of the outward side of the electric heating tank 12 by spot welding.
In the present embodiment, the depth of the electric heating groove 12 is four fifths of the thickness of the heater body 1, but may be two thirds.
Preferably, the heater body 1 is copper, but aluminum may also be used.
In the present embodiment, the electric heating wire 122 is laid in a bent state in the magnesium oxide insulating and heat conducting filling layer 121, and more specifically, laid in the magnesium oxide insulating and heat conducting filling layer 121 in a manner of being bent alternately in a U-shape and an n-shape.
Application example:
referring to fig. 2 in conjunction with fig. 1, fig. 2 shows a heated object 2 (also called "heated object") with a circular cross section, a circular heating cavity 11 of a heater body 1 of the present invention is matched with an outer wall of the heated object 2, and the heater body 1 and the heated object 2 are fixed outside the heater body 1 corresponding to a two-piece structure of the present invention by using an anchor ear 3 (also called "clamping ring"), and tightened by bolts 31 arranged at two ends of the anchor ear 3, specifically: the two ends of the hoop 3 are fastened by operating the lock nut 311 screwed on the bolt 31, and the hoop 3 forces the heater body 1 to be tightly attached to the heated body 2.
When the electric heating wire 122 is damaged, the hoop 3 is removed, the heater body 1 is taken off from the heated body 2, the sealing strip 124 is removed, the electric heating wire 122 is replaced, the magnesium oxide insulating and heat conducting filling layer 121 is supplemented into the electric heating groove 12, and finally the sealing strip 124 is returned.
In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.
Claims (7)
1. A magnesium oxide insulation heater is characterized by comprising a pair of heater bodies (1) which are matched face to face and form a circular heating cavity (11) which is penetrated up and down after being matched, electric heating grooves (12) are respectively arranged at the upper and lower positions of one side of each pair of heater bodies (1) which is back to the circular heating cavity (11) at intervals, a magnesium oxide insulation heat conduction filling layer (121) is arranged in each electric heating groove (12), electric heating wires (122) are laid in each magnesium oxide insulation heat conduction filling layer (121), the upper and lower adjacent electric heating grooves (12) are penetrated through electric heating wire transition holes (1231) which are arranged at one end of the groove bottom wall (123) of each electric heating groove (12), the electric heating wires (122) laid in the magnesium oxide insulation heat conduction filling layers (121) of the upper and lower adjacent electric heating grooves (12) are communicated through the electric heating wire transition holes (1231) to form an electric loop, and a sealing strip opening (124) is sealed at the position of one side of the electric heating grooves (12) which faces outwards.
2. The magnesia insulating heater according to claim 1, characterized in that an electric-heater-wire first-end-portion drawing hole (1241) is formed at an end of the sealing tape (124) corresponding to the uppermost one of the electric heating grooves (12), and an electric-heater-wire second-end-portion drawing hole (1242) is formed at an end of the sealing tape (124) corresponding to the lowermost one of the electric heating grooves (12) and at a position corresponding to the electric-heater-wire first-end-portion drawing hole (1241), the first end portion (1221) of the electric heater wire (122) is drawn out of the electric heating groove (12) through the electric-heater-wire first-end-portion drawing hole (1241), and the second end portion (1222) of the electric heater wire (122) is drawn out of the electric heating groove (12) through the electric-heater-wire second-end-portion drawing hole (1242).
3. The magnesia insulated heater according to claim 1 or 2, characterized in that the sealing strip (124) is an aluminum strip and is sealed with the notch portion of the side of the electric heating groove (12) facing outward by spot welding.
4. The magnesia insulated heater according to claim 1, characterized in that the depth of the electrical heating groove (12) is four fifths or two thirds of the thickness of the heater body (1).
5. The magnesia insulated heater according to claim 1 or 4, characterized in that the heater body (1) is copper or aluminum.
6. The insulating magnesia heater according to claim 1 or 2, characterized in that the electric heating wire (122) is laid in a bent state in the insulating and heat-conducting magnesia filler layer (121).
7. The magnesia insulated heater of claim 6, wherein the bend is a U-shaped and an n-shaped cyclically alternating bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308192.6A CN107087317B (en) | 2017-05-04 | 2017-05-04 | Magnesium oxide insulating heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710308192.6A CN107087317B (en) | 2017-05-04 | 2017-05-04 | Magnesium oxide insulating heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107087317A CN107087317A (en) | 2017-08-22 |
| CN107087317B true CN107087317B (en) | 2023-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710308192.6A Active CN107087317B (en) | 2017-05-04 | 2017-05-04 | Magnesium oxide insulating heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107087317B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108642459A (en) * | 2018-06-25 | 2018-10-12 | 无锡舒玛天科新能源技术有限公司 | A kind of pipe target binding heating device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102905409A (en) * | 2012-10-10 | 2013-01-30 | 盐城市通亚电器厂 | Insulated magnesium oxide heating coil |
| CN206879126U (en) * | 2017-05-04 | 2018-01-12 | 常熟黑石电热科技有限公司 | Magnesium oxide insulated heater |
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2017
- 2017-05-04 CN CN201710308192.6A patent/CN107087317B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102905409A (en) * | 2012-10-10 | 2013-01-30 | 盐城市通亚电器厂 | Insulated magnesium oxide heating coil |
| CN206879126U (en) * | 2017-05-04 | 2018-01-12 | 常熟黑石电热科技有限公司 | Magnesium oxide insulated heater |
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| Publication number | Publication date |
|---|---|
| CN107087317A (en) | 2017-08-22 |
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