CN110072306B - Externally-wound magnesium oxide column single-head electric heating tube - Google Patents
Externally-wound magnesium oxide column single-head electric heating tube Download PDFInfo
- Publication number
- CN110072306B CN110072306B CN201910398297.4A CN201910398297A CN110072306B CN 110072306 B CN110072306 B CN 110072306B CN 201910398297 A CN201910398297 A CN 201910398297A CN 110072306 B CN110072306 B CN 110072306B
- Authority
- CN
- China
- Prior art keywords
- magnesium oxide
- oxide column
- column
- wound
- resistance wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 103
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000005485 electric heating Methods 0.000 title claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 230000001681 protective effect Effects 0.000 claims description 17
- 239000012188 paraffin wax Substances 0.000 claims description 15
- 229910052573 porcelain Inorganic materials 0.000 claims description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000012258 stirred mixture Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 description 17
- 238000007789 sealing Methods 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- H05B3/02—Details
-
- 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
Landscapes
- Resistance Heating (AREA)
Abstract
The invention discloses a magnesium oxide column for an electric heating tube, which adopts a cylindrical structure sintered by magnesium oxide powder, wherein the outer surface of the cylindrical structure is provided with a spiral external thread structure with uniform thread pitch, and two end faces of the cylindrical structure are respectively provided with a first step face and a second step face for connection; two parallel conductive rod holes are arranged on the longitudinal vertical surface of the columnar structure; one end of the conductive rod hole is arranged on the first step surface, and the other end of the conductive rod hole is arranged on the second step surface. The invention also discloses the electrothermal tube comprising the magnesium oxide column, the magnesium oxide column can uniformly fix the resistance wire in the electrothermal tube, so that the phenomenon that the resistance wire generates heat unevenly due to dead weight and interval change under the condition that the resistance wire cannot be supported is avoided, and the electrothermal tube is arranged in the middle, so that the heat conduction efficiency of the electrothermal tube is improved, and the heating temperature is uniform.
Description
Technical Field
The invention belongs to the technical field of electric heating, and particularly relates to an externally-wound magnesium oxide column single-head electric heating tube.
Background
The electrothermal tube is a tubular electrothermal element, and is an electrical element specially used for converting electric energy into heat energy. It uses metal protecting sleeve as shell (including stainless steel and copper tube), and uniformly distributes spiral electrothermal alloy wires (nickel-chromium and iron-chromium alloy) along central axial direction in the tube, and its gap is filled with compacted magnesia sand with good insulating and heat-conducting properties, and two ends of tube mouth are sealed by silica gel, and said metal electrothermal element can be used for heating air, molten salt, metal mould and various liquids. Common electric heating tubes include a fin electric heating tube, a Teflon electric heating tube, a single-head electric heating tube and the like. Simple use, convenient installation and no pollution, and is widely used in various heating occasions.
The powder filling process of the electric heating tube is operated vertically, the spiral resistance wire is vertically arranged in the protective sleeve, and the self weight of the spiral resistance wire can generate a droop phenomenon, while the conventional protective sleeve powder filling process can not control the spiral distance of the spiral resistance wire, so that the electric heating tube generates uneven heat, and local overheating is caused to influence the product quality and the service life. And the guarantee well pipe device that uses among the conventional electrothermal tube powder filling technology hardly guarantees the precision placed in the middle of the spiral resistance wire at the vibration powder filling in-process, and the spiral resistance wire is easy off-centre to lead to creepage distance between resistance wire and the protecting pipe to reduce, and electrothermal tube insulating properties can't be applicable to environment such as high voltage, high temperature, urgently need a technical scheme to solve the problem that the spiral interval of resistance wire in the electrothermal tube is uneven and placed in the middle.
Disclosure of Invention
The invention aims to solve the problems and provides an externally-wound magnesium oxide column single-head electric heating tube.
The scheme of the invention is as follows: the magnesium oxide column for the electric heating tube is of a cylindrical structure sintered by magnesium oxide powder, the outer surface of the cylindrical structure is provided with a spiral external thread structure with uniform thread pitch, and two end faces of the cylindrical structure are respectively provided with a first step face and a second step face for connection; two parallel conductive rod holes are arranged on the vertical surface of the columnar structure; one end of the conductive rod hole is arranged on the first step surface, and the other end of the conductive rod hole is arranged on the second step surface.
Furthermore, an enlarged magnesium column hole is also arranged in the conductive rod hole arranged on the first step surface.
Furthermore, a plurality of arc-shaped protruding parts which are concentric and have the same diameter are arranged on the outer surface of the cylindrical structure.
Further, the spiral groove of the external thread structure of the cylindrical structure is set to be a rectangular groove structure or an arc groove structure.
Further, the manufacturing steps of the magnesium oxide column are as follows:
(1) pouring magnesium oxide powder with the purity of more than or equal to 90 percent into a ball mill for grinding for 48 hours;
(2) pouring the paraffin into a paraffin dissolver, and heating to 70-120 ℃ until the paraffin is completely dissolved;
(3) putting the dissolved paraffin and the ground magnesium oxide powder into a high-speed stirrer according to the proportion of 3:17, and uniformly stirring;
(4) placing the uniformly stirred mixture of the paraffin and the magnesia powder into a grouting machine, and grouting to obtain a semi-finished magnesia column product;
(5) and mixing the formed semi-finished magnesium oxide column product and aluminum oxide powder, putting the mixture into a crucible, and then putting the crucible into a kiln at 1280-1300 ℃ for firing for 48 hours to obtain the finished magnesium oxide column product.
The invention also discloses an externally-wound magnesium oxide column single-head electric heating tube comprising the magnesium oxide column, which comprises a metal protecting sleeve, the magnesium oxide column, a conductive rod and a resistance wire; the adjacent magnesium oxide columns are connected in a matching way through the first step surface and the second step surface; two conductive rods are inserted into two parallel conductive rod holes in the magnesium oxide column; the resistance wire is wound in the spiral groove of the external thread structure of the magnesium oxide column, and the resistance wire is not wound in the spiral grooves at the uppermost end and the lowermost end of the connected magnesium oxide column; the resistance wire and the two current-conducting rods are connected in series to form a closed loop, and current flows in and out from the two current-conducting rods at the same end of the metal sheath pipe; the magnesium oxide column is wound with the resistance wire and then arranged in the metal protective sleeve, and magnesium oxide powder filler is compacted in a gap between the magnesium oxide column and the metal protective sleeve, and the non-electric connection end of the metal protective sleeve is sealed to form the externally-wound magnesium oxide column single-head electric heating tube.
Further: in the externally-wound magnesium oxide column single-head electric heating tube, a double-hole insulating porcelain head is arranged at the upper end of the metal protective sleeve, two through holes for the conductive rods to pass through are formed in the double-hole insulating porcelain head, and the two through holes correspond to the conductive rod holes of the magnesium oxide column; the lower end of the double-hole insulating porcelain head is arranged in the metal sheath pipe and is pressed at the uppermost end of the magnesium oxide column.
Further: in the externally-wound magnesium oxide column single-head electric heating tube, the non-electric connection end of the lower end of the metal protective sleeve is provided with a back cover baffle, and the back cover baffle is fixed at the bottom of the metal protective sleeve and is tightly pressed at the lowest end of the magnesium oxide column.
The invention has the beneficial effects that: according to the electric heating tube, the magnesium oxide column can uniformly fix the resistance wire in the electric heating tube, so that the phenomenon that the resistance wire generates uneven heat due to dead weight and interval change under the condition that the resistance wire cannot be supported is avoided, and the electric heating tube is arranged in the middle, so that the heat conduction efficiency of the electric heating tube is improved, and the heating temperature is uniform.
Drawings
FIG. 1 is a schematic perspective view of a magnesium oxide column according to example 2 of the present invention;
FIG. 2 is a schematic front view of a magnesium oxide column according to example 2 of the present invention;
FIG. 3 is a schematic cross-sectional view of a magnesium oxide column A-A according to example 2 of the present invention;
FIG. 4 is a schematic structural view of a magnesium oxide column according to example 1 of the present invention.
FIG. 5 is an enlarged view of the structure of the column of magnesium oxide according to the present invention at the position K.
Fig. 6 is a schematic structural view of an externally-wound single-end electrothermal tube of the present invention.
Fig. 7 is an enlarged structural diagram of the external single-head electrothermal tube at the position H.
Fig. 8 is an enlarged structural diagram of the external single-head electrothermal tube at the position G.
Fig. 9 is an enlarged schematic view of the electric heating tube with single head at position D.
Fig. 10 is an enlarged structural diagram of the external single-head electrothermal tube at the position B.
Fig. 11 is a schematic sectional view of the single-head electrothermal tube with an external winding according to the present invention.
Wherein: 1. a double-hole insulating porcelain head; 2. a metal sheath tube; 3. a magnesium oxide column; 4. a conductive rod; 5. a resistance wire; 6. a bottom sealing baffle plate; 7. a magnesium oxide powder filler; 31. An external thread; 32. a first step surface; 33. a second step surface; 34. a conductive rod hole; 35. a magnesium pillar hole; 36. an arc-shaped protrusion; 311. a rectangular groove structure; 312. the circular arc groove structure.
Detailed Description
The invention is further described with reference to the accompanying drawings of the specification, figures 1 to 11.
Example 1
As shown in fig. 2 to 4, the magnesia column 3 for the electric heating tube adopts a cylindrical structure sintered by magnesia powder, the outer surface of the cylindrical structure is provided with a spiral external thread 31 structure with uniform pitch, and two end faces of the cylindrical structure are respectively provided with a first step face 32 and a second step face 33 for connection; after the first step surface 32 and the second step surface 33 are butted, the external thread 31 forms a continuous, complete and uniform spiral structure. Two parallel conductive rod holes 34 are arranged on the vertical longitudinal surface of the columnar structure; the conductive rod hole 34 has one end disposed on the first step surface 32 and the other end disposed on the second step surface 33. The structure can ensure stable spacing of the resistance wire 5 in the electric heating tube, the heating effect is uniform, the local temperature is prevented from being overhigh when the electric heating tube is heated, the service life of the electric heating tube can be obviously prolonged, and the structure of the electric heating tube is convenient to produce and install.
Example 2
As shown in fig. 1 to 3 and 5, the magnesium oxide column 3 for the electric heating tube adopts a cylindrical structure sintered by magnesium oxide powder, the outer surface of the cylindrical structure is provided with a spiral external thread 31 structure with uniform pitch, and two end faces of the cylindrical structure are respectively provided with a first step face 32 and a second step face 33 for connection; two parallel conductive rod holes 34 are arranged on the vertical longitudinal surface of the columnar structure; the conductive rod hole 34 has one end disposed on the first step surface 32 and the other end disposed on the second step surface 33. The conductive rod hole 34 arranged on the first step surface 32 is also internally provided with an enlarged magnesium column hole 35, the enlarged magnesium column hole 35 is used for placing the resistance wire 5 into the magnesium oxide column 3 when the resistance wire is wound on the conductive rod 4, a gap is reserved after the first step surface 32 is connected with the second step surface 33, and magnesium oxide powder can fill the joint of the two magnesium oxide columns 3 through the gap when powder is conveniently filled. The outer surface of the cylindrical structure is also provided with a plurality of arc-shaped protrusions 36 which are concentric and have the same diameter, so that the magnesium oxide column 3 can be centered in the electric heating tube conveniently, and the distance between the magnesium oxide column 3 and the inner side of the metal protecting sleeve 2 in the electric heating tube is ensured. The spiral groove of the external thread 31 structure with the cylindrical structure is set to be a rectangular groove structure 311 or an arc groove structure 312, and can be suitable for the circular resistance wire 5 or the flat resistance wire 5.
Example 3
The magnesium oxide column comprises the following manufacturing steps:
(1) pouring magnesium oxide powder with the purity of more than or equal to 90 percent into a ball mill for grinding for 48 hours;
(2) pouring the paraffin into a paraffin dissolver, and heating to 70-120 ℃ until the paraffin is completely dissolved;
(3) putting the dissolved paraffin and the ground magnesium oxide powder into a high-speed stirrer according to the proportion of 3:17, and uniformly stirring;
(4) placing the uniformly stirred mixture of the paraffin and the magnesia powder into a grouting machine, and grouting to obtain a semi-finished magnesia column product;
(5) and putting the formed semi-finished magnesium oxide column into a kiln at 1280-1300 ℃ for firing for 48 hours to obtain the finished magnesium oxide column.
Example 4
As shown in fig. 6 to 11, the invention also discloses an externally-wound magnesium oxide column single-head electric heating tube comprising a magnesium oxide column 3, which comprises a metal protecting sleeve 2, the magnesium oxide column 3, a conductive rod 4 and a resistance wire 5; the adjacent magnesium oxide columns 3 are connected in a matching way through a first step surface 32 and a second step surface 33; two conductive rods 4 are inserted in two parallel conductive rod holes 34 in the magnesium oxide column 3; the resistance wire 5 is wound in the spiral groove of the external thread 31 structure of the magnesium oxide column 3, and the resistance wire 5 is not wound in the spiral grooves at the uppermost end and the lowermost end of the connected magnesium oxide column 3, so that the resistance wire 5 is conducted, the conductive rod does not generate heat, and the cold end distance is controlled; the resistance wire 5 and the two conducting rods 4 are connected in series to form a closed loop, and current flows in and out from the two conducting rods 4 at the same end of the metal sheath tube 2; the magnesium oxide column 3 is wound with the resistance wire 5 and then arranged in the metal protecting sleeve 2, magnesium oxide powder filler is compacted in a gap between the magnesium oxide column 3 and the metal protecting sleeve 2, the non-electric connection end of the metal protecting sleeve 2 is sealed by glue to form an externally wound magnesium oxide column single-head electric heating tube, and the glue is made of silicone rubber 704 glue and AB glue of HARDMAN company in America; the A component of AB glue from HARDMAN company in the United states is a binder HARDMAN 46717, the B component is a binder HARDMAN 56717, and the A and B components are mixed according to a ratio of 1:1 for use; firstly, sealing the AB glue of the American HARDMAN company once, and then sealing the silicone rubber 704 glue on the surface of the AB glue; the AB glue of HARDMAN company is used for first sealing, the sealing performance of the AB glue after curing is excellent, the electric heating tube is placed in a water tank with the depth of 1.5 meters for 24 hours after being sealed by the AB glue, and the insulation resistance is not reduced after the tube is air-dried. However, the AB glue is very hard after being cured, and in order to avoid capillary cracks generated after vibration in the process of use or transportation and influence on sealing performance, the silicone rubber 704 glue is poured once after the AB glue of HARDMAN company is sealed, the toughness of the cured silicone rubber 704 glue is good, no product cracks are generated after vibration, the defects of the AB glue of HARDMAN company can be well overcome, the sealing performance and the aging resistance of the electrothermal tube can be ensured by matching the two kinds of glue, and the electric insulation performance is good. In the externally-wound magnesium oxide column single-head electric heating tube, a double-hole insulating porcelain head 1 is arranged at the upper end of the metal protective sleeve 2, the double-hole insulating porcelain head 1 is provided with two through holes for a conductive rod 4 to pass through, and the two through holes correspond to the conductive rod holes 34 of the magnesium oxide column 3; the lower end of the double-hole insulating porcelain head 1 is arranged in the metal protecting sleeve 2 and is pressed at the uppermost end of the magnesium oxide column 3. In the single-head electrothermal tube of the externally-wound magnesium oxide column, the lower end of the metal protective sleeve is provided with a back cover baffle 6, and the back cover baffle 6 is fixed at the bottom of the metal protective sleeve 2 and is tightly pressed at the lowest end of the magnesium oxide column 3. Through magnesium oxide post 3, can be the even fixing of resistance wire in the electrothermal tube, avoid resistance wire 5 because the dead weight, change in the condition interval that can not obtain the support, it is inhomogeneous to cause the electrothermal tube to generate heat, magnesium oxide post 3 can guarantee that spiral resistance wire 5 sets up placed in the middle, effectual vibration influence of filling powder of resisting, stability placed in the middle when having guaranteed to fill powder, spiral resistance wire 5 precision placed in the middle has been improved by a wide margin, the creepage distance homogeneity between spiral resistance wire 5 and metal sheathing pipe 2 has been increased, the insulating properties of electrothermal tube has been improved by a wide margin.
Although particular embodiments of the invention have been described and illustrated in detail, it should be understood that various equivalent changes and modifications could be made to the above-described embodiments in accordance with the spirit of the invention, and the resulting functional effects would still fall within the scope of the invention.
Claims (6)
1. An externally-wound magnesium oxide column single-end electric heating tube is characterized in that: comprises a metal sheath tube, a magnesium oxide column, a conductive rod and a resistance wire; the magnesium oxide column is of a cylindrical structure sintered by magnesium oxide powder, a spiral external thread structure with uniform thread pitch is arranged on the outer surface of the cylindrical structure, and a first step surface and a second step surface which are used for connection are respectively arranged on two end surfaces of the cylindrical structure; two parallel conductive rod holes are arranged on the vertical surface of the columnar structure; one end of the conductive rod hole is arranged on the first step surface, and the other end of the conductive rod hole is arranged on the second step surface;
the outer surface of the cylindrical structure is also provided with a plurality of arc-shaped convex parts which are uniform and concentric and have the same diameter;
the adjacent magnesium oxide columns are connected in a matching way through the first step surface and the second step surface; two conductive rods are inserted into two parallel conductive rod holes in the magnesium oxide column; the resistance wire is wound in the spiral groove of the external thread structure of the magnesium oxide column, and the resistance wire is not wound in the spiral grooves at the uppermost end and the lowermost end of the connected magnesium oxide column; the resistance wire and the two current-conducting rods are connected in series to form a closed loop, and current flows in and out from the two current-conducting rods at the same end of the metal sheath pipe; the magnesium oxide column is wound with the resistance wire and then arranged in the metal protective sleeve, and magnesium oxide powder filler is compacted in a gap between the magnesium oxide column and the metal protective sleeve, and the non-electric connection end of the metal protective sleeve is sealed to form the externally-wound magnesium oxide column single-head electric heating tube.
2. The single-ended electrothermal tube with an externally wound magnesium oxide column according to claim 1, wherein an enlarged magnesium column hole is further provided in the conductive rod hole provided on the first step surface.
3. The externally-wound magnesium oxide cylindrical single-ended electrothermal tube according to claim 1, wherein the helical groove of the external thread structure of the cylindrical structure is configured in a rectangular groove structure or an arc groove structure.
4. The single-ended electrothermal tube with an externally wrapped magnesium oxide column according to claim 1, wherein the magnesium oxide column is fabricated by the steps of:
(1) pouring magnesium oxide powder with the purity of more than or equal to 90 percent into a ball mill for grinding for 48 hours;
(2) pouring the paraffin into a paraffin dissolver, and heating to 70-120 ℃ until the paraffin is completely dissolved;
(3) putting the dissolved paraffin and the ground magnesium oxide powder into a high-speed stirrer according to the proportion of 3:17, and uniformly stirring;
(4) placing the uniformly stirred mixture of the paraffin and the magnesia powder into a grouting machine, and grouting to obtain a semi-finished magnesia column product;
and putting the formed semi-finished magnesium oxide column into a kiln at 1280-1300 ℃ for firing for 48 hours to obtain the finished magnesium oxide column.
5. The externally-wound magnesium oxide column single-end electrothermal tube according to claim 1, wherein: the upper end of the metal protective sleeve is provided with a double-hole insulating porcelain head, the double-hole insulating porcelain head is provided with two through holes for the conductive rods to pass through, and the two through holes correspond to the conductive rod holes of the magnesium oxide columns; the lower end of the double-hole insulating porcelain head is arranged in the metal sheath pipe and is pressed at the uppermost end of the magnesium oxide column.
6. The externally-wound magnesium oxide column single-end electrothermal tube according to claim 1, wherein: the non-power connection end of the metal protective sleeve is provided with a back cover baffle which is fixed at the bottom of the metal protective sleeve and is pressed at the lowest end of the magnesium oxide column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398297.4A CN110072306B (en) | 2019-05-14 | 2019-05-14 | Externally-wound magnesium oxide column single-head electric heating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398297.4A CN110072306B (en) | 2019-05-14 | 2019-05-14 | Externally-wound magnesium oxide column single-head electric heating tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110072306A CN110072306A (en) | 2019-07-30 |
| CN110072306B true CN110072306B (en) | 2022-05-13 |
Family
ID=67370716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910398297.4A Active CN110072306B (en) | 2019-05-14 | 2019-05-14 | Externally-wound magnesium oxide column single-head electric heating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110072306B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111182665B (en) * | 2019-12-27 | 2020-08-21 | 镇江陆陆电气有限公司 | Explosion-proof resistance wire, explosion-proof resistance wire heating pipe and manufacturing process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014691A1 (en) * | 2006-07-28 | 2008-02-07 | Mingfeng You | Heater |
| CN201134940Y (en) * | 2007-11-20 | 2008-10-15 | 王晓峰 | Electric heating tube |
| CN203399315U (en) * | 2013-07-18 | 2014-01-15 | 广州市益德电热制品有限公司 | Spiral type instant heating tube |
| CN107417260A (en) * | 2017-09-06 | 2017-12-01 | 盐城市华康电热绝缘材料厂 | The hot pressing method for preparing of magnesia ceramics |
| CN208094819U (en) * | 2018-04-27 | 2018-11-13 | 江苏顺发电热材料有限公司 | A kind of double-layer structure electrothermal tube |
-
2019
- 2019-05-14 CN CN201910398297.4A patent/CN110072306B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014691A1 (en) * | 2006-07-28 | 2008-02-07 | Mingfeng You | Heater |
| CN201134940Y (en) * | 2007-11-20 | 2008-10-15 | 王晓峰 | Electric heating tube |
| CN203399315U (en) * | 2013-07-18 | 2014-01-15 | 广州市益德电热制品有限公司 | Spiral type instant heating tube |
| CN107417260A (en) * | 2017-09-06 | 2017-12-01 | 盐城市华康电热绝缘材料厂 | The hot pressing method for preparing of magnesia ceramics |
| CN208094819U (en) * | 2018-04-27 | 2018-11-13 | 江苏顺发电热材料有限公司 | A kind of double-layer structure electrothermal tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110072306A (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110087352B (en) | Electric heating tube | |
| US4104509A (en) | Self-regulating heating element | |
| US2942223A (en) | Electrical resistance heater | |
| CN110072306B (en) | Externally-wound magnesium oxide column single-head electric heating tube | |
| CN210579305U (en) | Single-head electric heating tube with multi-section power split heating | |
| CN2938681Y (en) | Electric heating element with thermal state isolation performance | |
| CN110087350B (en) | Double-end electrothermal tube | |
| CN201878351U (en) | Tubular resistor | |
| CN208225630U (en) | A kind of automobile-used ultrahigh power resistor | |
| CN104955184B (en) | A kind of Novel pole silk compound pole shape heat-generating pipe | |
| CN218647710U (en) | Double-end noninductive tubular metal resonator resistance | |
| CN203399315U (en) | Spiral type instant heating tube | |
| CN204217146U (en) | A kind of heating rod of fused salt tower type thermal generation system | |
| CN105939547A (en) | Carbon fiber heating cable for oil production | |
| CN211019277U (en) | Electric heater | |
| CN102183059A (en) | Radiating unit of directly-heated type electric heater and manufacturing method of radiating unit | |
| CN216673324U (en) | Flat electrothermal tube | |
| CN219780427U (en) | Single-end electrothermal tube | |
| CN202394680U (en) | Large-power rectifier transformer of charger | |
| CN206413210U (en) | A kind of carbon fiber heating tube | |
| CN208061832U (en) | Power transformer bushing | |
| CN201184826Y (en) | Integral-sintered inner winding spring type platinum thermal resistance | |
| CN211903725U (en) | High-efficiency heater | |
| CN205561280U (en) | Brand -new energy -saving electric heating pipe | |
| CN216217619U (en) | High-voltage heating tube resistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220418 Address after: 238301 No. 4, Jingsi Road, Wuwei Economic Development Zone, Wuwei City, Wuhu City, Anhui Province Applicant after: Anhui Yuansi Electric Co.,Ltd. Address before: 238335 Nanhu administrative village, YAOGOU Town, Wuwei County, Wuhu City, Anhui Province Applicant before: Anhui Centimeter Photoelectric Thermal Technology Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240823 Address after: No. 06, Intelligent Electric Valley Industrial Park, Longxingzhou Avenue, Gaogou Town, Wuwei City, Wuhu City, Anhui Province, China 241399 Patentee after: Wuhu Jinrui Electric Automation Co.,Ltd. Country or region after: China Address before: 238301 No. 4, Jingsi Road, Wuwei Economic Development Zone, Wuwei City, Wuhu City, Anhui Province Patentee before: Anhui Yuansi Electric Co.,Ltd. Country or region before: China |