CN114243320A - Cold and hot section switching sleeve of armored heating wire - Google Patents
Cold and hot section switching sleeve of armored heating wire Download PDFInfo
- Publication number
- CN114243320A CN114243320A CN202111609223.4A CN202111609223A CN114243320A CN 114243320 A CN114243320 A CN 114243320A CN 202111609223 A CN202111609223 A CN 202111609223A CN 114243320 A CN114243320 A CN 114243320A
- Authority
- CN
- China
- Prior art keywords
- cold
- hot section
- heating wire
- adapter sleeve
- wall
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
A switching sleeve for a hot and cold section of an armored heating wire belongs to the technical field of heating wire connection structures, and particularly relates to a switching sleeve for a hot and cold section of an armored heating wire. The invention provides a cold and hot section adapter sleeve of an armored heating wire. The cold-hot section adapter sleeve comprises a cold-hot section adapter sleeve base and is characterized in that one end of the cold-hot section adapter sleeve base is provided with a cold-hot section adapter sleeve end cover, a cold-end lead protection tube penetrates into the cold-hot section adapter sleeve end cover, a cold-end lead wire core is arranged on the inner side of the cold-end lead protection tube, and the inner end of the cold-end lead wire core is arranged in the cold-hot section adapter sleeve base; the heating wire protection tube penetrates into the cold and hot section adapter sleeve base, the heating wire core is arranged on the inner side of the heating wire protection tube, and the inner end of the heating wire core is in overlapped butt joint with the inner end of the cold end lead wire core.
Description
Technical Field
The invention belongs to the technical field of heating wire connection structures, and particularly relates to a cold and hot section adapter sleeve of an armored heating wire.
Background
When the armored heating wire is in an electrified heating state, the surface temperature is different from 200 ℃ to 700 ℃ (depending on the meter/power of the armored heating wire), the armored heating wire cannot be directly led into the junction box due to overhigh temperature, and otherwise, the internal temperature of the junction box is overhigh or the insulating layers of other electrical appliances are damaged to cause short-circuit faults. Meanwhile, the high temperature of the exposed heating wire (a certain distance is from the pipeline or the tank body to be heated to the junction box of the armored heating wire, 200MM to 2000MM is unequal, and the armored heating wire is exposed at the distance) can cause burn to surrounding equipment or human bodies. Therefore, there is a need for an adapter having a transition function to transition a heated section to a non-heated section, i.e., a cold section.
Disclosure of Invention
The invention aims at the problems and provides a cold and hot section adapter sleeve of an armored heating wire.
In order to achieve the purpose, the cold-hot section adapter sleeve comprises a cold-hot section adapter sleeve base and is characterized in that one end of the cold-hot section adapter sleeve base is provided with a cold-hot section adapter sleeve end cover, a cold-end lead protection tube penetrates through the cold-hot section adapter sleeve end cover, a cold-end lead wire core is arranged on the inner side of the cold-end lead protection tube, and the inner end of the cold-end lead wire core is arranged in the cold-hot section adapter sleeve base; the heating wire protection pipe penetrates through the cold and hot section adapter sleeve base, a heating wire core is arranged on the inner side of the heating wire protection pipe, and the inner end of the heating wire core is overlapped and butted with the inner end of the cold end lead wire core;
between cold junction lead protection inside pipe wall and the cold junction lead core outer wall, between cold junction lead protection outside pipe wall and the cold and hot section switching cover end cover inner wall, between cold junction lead core outer wall and the cold and hot section switching cover base inner wall, between heating core outer wall and the heating wire protection inside pipe wall, all be provided with the magnesium oxide powder insulating layer between heating wire protection outside pipe wall and the cold and hot section switching cover base inner wall.
As a preferred scheme, the cold-hot section adapter sleeve base and the cold-hot section adapter sleeve end cover are connected into a whole in a threaded butt joint and laser welding mode.
As another preferred scheme, a magnesium oxide powder filling opening is formed in the base of the cold-hot section adapter sleeve.
Secondly, the end part of the cold and hot section adapter sleeve base is welded with the outer wall of the cold end lead protection tube, and the end part of the cold and hot section adapter sleeve base is welded with the outer wall of the heating wire protection tube.
In addition, the clearance between the inner diameter of the transition sleeve of the cold and hot section of the armored heating wire and the outer diameter of the armored heating wire and the cold end lead is eliminated by using a mode of crimping by using a regular hexagon wire crimper, and the clearance of 0.1 mm is reserved between the inner diameter of the transition sleeve of the cold and hot section of the armored heating wire and the outer diameter of the cold end lead only in the previous processing by utilizing the principle that the cylindrical sectional area is reduced after being pressed into a regular hexagon by the regular hexagon wire crimper with the same diameter and the outer circle, and the clearance is converted into tight fit from clearance fit through crimping before welding, so that the fit clearance is eliminated, and conditions are created for the subsequent welding process.
The invention has the beneficial effects.
After the armored heating wire cold and hot section adapter sleeve is adopted, the cold end lead section of the heating wire is conveniently connected with the wiring terminal in the junction box, the heating section of the heating wire is prevented from being directly exposed and led into the junction box, the internal temperature of the junction box is overhigh or insulation layers of other electrical appliances are damaged, short circuit faults are caused, and meanwhile, the exposed heating wire is prevented from burning surrounding equipment or human bodies due to high temperature (see the schematic diagram of the overall structure of the heating wire in figure 2, and the cold end lead between the terminal lead component and the cold and hot section adapter sleeve is not heated, so that the effect is achieved).
The invention solves the difficult problem of switching the armored heating wire from the heating section to the cold end lead section.
The invention is a split structure (a cold-hot section adapter sleeve base and a cold-hot section adapter sleeve end cover), the internal space of the cold-hot section adapter sleeve of the armored heating wire is reasonably enlarged (see the description of the accompanying figures 8 and 9), the space of a magnesium oxide insulating layer is enlarged, and short circuit and leakage faults can not be caused even if a cold-end copper lead is slightly deformed in a high-temperature state. The butt joint area of the heating wire core and the wire core of the cold end lead can be properly increased, and the reliability of electrical connection is guaranteed.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1 is a schematic diagram of the overall structure of a cold-hot section adapter sleeve.
Fig. 2 is a schematic view of the overall structure of the heater wire.
FIG. 3 is a schematic diagram of a first step wire core butt joint.
FIG. 4 is a schematic view of a second step of pressing the base and pouring magnesium oxide powder.
In the third step of fig. 5, the end cap is screwed to the base, and the process is shifted to the next step, schematically illustrated by laser welding.
FIG. 6 is a schematic diagram of the original integrated structure design and the wire core butt joint.
FIG. 7 is a schematic view of the original integrated structure, poured with magnesium oxide powder.
FIG. 8 is a schematic view of the original integrated structure design.
Fig. 9 is a schematic diagram of the design of the new split structure.
Fig. 10 is a view showing a structure of a terminal lead.
FIG. 11 is a schematic view before and after crimping.
Fig. 12 is a partially enlarged view of fig. 2.
Detailed Description
As shown in the figure, the cold-hot section connecting sleeve comprises a cold-hot section connecting sleeve base, wherein one end of the cold-hot section connecting sleeve base is provided with a cold-hot section connecting sleeve end cover, a cold-end lead protection tube penetrates into the cold-hot section connecting sleeve end cover, a cold-end lead wire core is arranged on the inner side of the cold-end lead protection tube, and the inner end of the cold-end lead wire core is arranged in the cold-hot section connecting sleeve base; the heating wire protection pipe penetrates through the cold and hot section adapter sleeve base, a heating wire core is arranged on the inner side of the heating wire protection pipe, and the inner end of the heating wire core is overlapped and butted with the inner end of the cold end lead wire core;
between cold junction lead protection inside pipe wall and the cold junction lead core outer wall, between cold junction lead protection outside pipe wall and the cold and hot section switching cover end cover inner wall, between cold junction lead core outer wall and the cold and hot section switching cover base inner wall, between heating core outer wall and the heating wire protection inside pipe wall, all be provided with the magnesium oxide powder insulating layer between heating wire protection outside pipe wall and the cold and hot section switching cover base inner wall.
The armored heating wire cold and hot section adapter sleeve, the terminal lead (capable of adopting RV multi-strand annealed copper wires for connecting a wiring terminal in a wiring box), the terminal lead assembly (capable of adopting a copper piece, a connecting nut and a tightening nut, wherein the copper piece is used for containing sealant, the connecting nut is used for connecting a wire outlet of the wiring box, and the tightening nut is used for fixing a heating wire.
The armored heating wire comprises a heating core wire (a nickel-based alloy core wire can be adopted), an insulating layer (a magnesium oxide insulating layer can be adopted) is arranged on the outer side of the heating core wire, and a metal sheath (a seamless stainless steel pipe can bear the high temperature of 750 ℃, has corrosion resistance and high mechanical strength, is not easy to break, resists low temperature, is not brittle when constructed at low temperature, and is easy to construct and maintain in winter).
The cold-hot section adapter sleeve base and the cold-hot section adapter sleeve end cover are connected into a whole in a mode of thread butt joint and laser welding (as shown in figures 3, 4 and 5). The magnesium oxide insulation layer is connected into a whole in a mode of thread butt joint and laser welding, the inner diameter of a filling cavity of the magnesium oxide insulation layer is not limited by the outer diameters of the armored heating wire and the cold end lead, and the magnesium oxide insulation layer can be designed into a proper inner diameter at will according to needs.
The cold-hot section adapter sleeve base is provided with a magnesium oxide powder filling opening, and magnesium oxide powder is filled from the magnesium oxide powder filling opening to fill the whole inner cavity with the magnesium oxide powder (as shown in figures 3, 4 and 5).
The cold and hot section switching sleeve base end is welded with the outer wall of the cold end lead protection tube, and the cold and hot section switching sleeve base end is welded with the outer wall of the heating wire protection tube.
The vertical position filling magnesia powder filling opening is thick, and the filling efficiency is high (see fig. 8 and 9, the original integrated structure is only provided with a filling opening with the diameter of 3.2 mm on the side surface, and the split structure is filled from the upper end opening of the base of the cold-hot section adapter sleeve, and the diameter of the split structure is 10 mm.
The time is short, the efficiency is improved, the exposure time of the magnesium oxide powder in the air is shortened, the moisture absorption of the magnesium oxide powder is avoided, and the insulating property is improved.
As shown in fig. 11, the clearance between the inner diameter of the transition sleeve of the cold and hot section of the armored heating wire and the outer diameter of the armored heating wire and the cold end lead can be eliminated by crimping the regular hexagonal crimping pliers, and by utilizing the principle that the cylindrical sectional area is reduced after being pressed into a regular hexagon by the regular hexagonal crimping pliers with the same diameter and excircle, a clearance of 0.1 mm is reserved only between the inner diameter of the transition sleeve of the cold and hot section of the armored heating wire and the outer diameter of the cold end lead, and the clearance is changed into tight fit from clearance fit by crimping before welding, so that the fit clearance is eliminated, and conditions are created for the subsequent welding process.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (5)
1. The cold and hot section switching sleeve of the armored heating wire comprises a cold and hot section switching sleeve base and is characterized in that one end of the cold and hot section switching sleeve base is provided with a cold and hot section switching sleeve end cover, a cold end lead protection tube penetrates through the cold and hot section switching sleeve end cover, a cold end lead wire core is arranged on the inner side of the cold end lead protection tube, and the inner end of the cold end lead wire core is arranged in the cold and hot section switching sleeve base; the heating wire protection pipe penetrates through the cold and hot section adapter sleeve base, a heating wire core is arranged on the inner side of the heating wire protection pipe, and the inner end of the heating wire core is overlapped and butted with the inner end of the cold end lead wire core;
between cold junction lead protection inside pipe wall and the cold junction lead core outer wall, between cold junction lead protection outside pipe wall and the cold and hot section switching cover end cover inner wall, between cold junction lead core outer wall and the cold and hot section switching cover base inner wall, between heating core outer wall and the heating wire protection inside pipe wall, all be provided with the magnesium oxide powder insulating layer between heating wire protection outside pipe wall and the cold and hot section switching cover base inner wall.
2. The sheathed heating wire cold-hot section adapter sleeve according to claim 1, wherein the cold-hot section adapter sleeve base and the cold-hot section adapter sleeve end cover are connected into a whole by adopting a thread butt joint and laser welding mode.
3. The sheathed heating wire cold-hot section adapter sleeve according to claim 1, wherein a magnesium oxide powder filling opening is arranged on the base of the cold-hot section adapter sleeve.
4. The sheathed heating wire cold-hot section adapter sleeve as claimed in claim 1, wherein the base end of the cold-hot section adapter sleeve is welded with the outer wall of the cold-end lead protection tube, and the base end of the cold-hot section adapter sleeve is welded with the outer wall of the heating wire protection tube.
5. The sheathed heating wire cold-hot section adapter sleeve according to claim 1, which is characterized in that a clearance between the inner diameter of the sheathed heating wire cold-hot section adapter sleeve and the outer diameters of the sheathed heating wire and the cold-end lead is eliminated by crimping with a regular hexagon wire crimper, and by utilizing the principle that the cylindrical sectional area is reduced after being crimped into a regular hexagon by the regular hexagon wire crimper with the same diameter and the outer circle, only a clearance of 0.1 mm is reserved between the inner diameter of the sheathed heating wire cold-hot section adapter sleeve and the outer diameters of the sheathed heating wire and the cold-end lead in the previous process, and the sheathed heating wire cold-hot section adapter sleeve is crimped before welding to be converted into a tight fit from the clearance fit, so that the fit clearance is eliminated, and conditions are created for the subsequent welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609223.4A CN114243320A (en) | 2021-12-27 | 2021-12-27 | Cold and hot section switching sleeve of armored heating wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111609223.4A CN114243320A (en) | 2021-12-27 | 2021-12-27 | Cold and hot section switching sleeve of armored heating wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243320A true CN114243320A (en) | 2022-03-25 |
Family
ID=80763274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111609223.4A Pending CN114243320A (en) | 2021-12-27 | 2021-12-27 | Cold and hot section switching sleeve of armored heating wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114243320A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527405A (en) * | 2008-03-04 | 2009-09-09 | 上海电缆研究所 | Cold end connecting device for heating cable and connecting method thereof |
| CN101534583A (en) * | 2009-03-05 | 2009-09-16 | 安徽鑫国仪表有限公司 | Armored heater |
| JP2011115001A (en) * | 2009-11-30 | 2011-06-09 | Yamari Sangyo Kk | Sheath cable connecting structure |
| CN202713645U (en) * | 2012-07-12 | 2013-01-30 | 安徽安泽电工有限公司 | Mineral-insulating heating cable joint |
| CN108258459A (en) * | 2017-12-13 | 2018-07-06 | 太原航空仪表有限公司 | A kind of high temperature resistant minor diameter insulation switching |
| CN211267114U (en) * | 2020-02-14 | 2020-08-14 | 合肥晞隆光电有限公司 | Connection structure of armored cable |
| CN212277457U (en) * | 2020-08-03 | 2021-01-01 | 山东本源晶体科技有限公司 | Simple high-temperature-resistant differential connector |
| CN213989524U (en) * | 2020-12-10 | 2021-08-17 | 武汉里得电力科技股份有限公司 | Crimping die |
| CN214381435U (en) * | 2020-12-24 | 2021-10-08 | 太原航空仪表有限公司 | Armored heating element switching structure |
-
2021
- 2021-12-27 CN CN202111609223.4A patent/CN114243320A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527405A (en) * | 2008-03-04 | 2009-09-09 | 上海电缆研究所 | Cold end connecting device for heating cable and connecting method thereof |
| CN101534583A (en) * | 2009-03-05 | 2009-09-16 | 安徽鑫国仪表有限公司 | Armored heater |
| JP2011115001A (en) * | 2009-11-30 | 2011-06-09 | Yamari Sangyo Kk | Sheath cable connecting structure |
| CN202713645U (en) * | 2012-07-12 | 2013-01-30 | 安徽安泽电工有限公司 | Mineral-insulating heating cable joint |
| CN108258459A (en) * | 2017-12-13 | 2018-07-06 | 太原航空仪表有限公司 | A kind of high temperature resistant minor diameter insulation switching |
| CN211267114U (en) * | 2020-02-14 | 2020-08-14 | 合肥晞隆光电有限公司 | Connection structure of armored cable |
| CN212277457U (en) * | 2020-08-03 | 2021-01-01 | 山东本源晶体科技有限公司 | Simple high-temperature-resistant differential connector |
| CN213989524U (en) * | 2020-12-10 | 2021-08-17 | 武汉里得电力科技股份有限公司 | Crimping die |
| CN214381435U (en) * | 2020-12-24 | 2021-10-08 | 太原航空仪表有限公司 | Armored heating element switching structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10194488B2 (en) | Electric heater with connection wire | |
| CN102361522B (en) | A kind of variable cross-section termination not armoured heating heater and preparation method thereof | |
| CN104157996A (en) | Copper-aluminum crimping terminal of embedded liner tube | |
| JP5091342B2 (en) | Spark plug and manufacturing method thereof | |
| WO2021197420A1 (en) | Electric energy transmission aluminum part, aluminum connecting part and copper-aluminum connector | |
| CN114243320A (en) | Cold and hot section switching sleeve of armored heating wire | |
| CN114071811A (en) | Armored heating wire | |
| CN202930576U (en) | Copper-aluminium conductor crimping terminal | |
| CN217216939U (en) | Armored heating wire | |
| CN205333208U (en) | A high low temperature connective bar for automobile engine temperature sensor | |
| CN202979330U (en) | Floor heating cable with crimping joint | |
| CN211507914U (en) | Novel tip aluminium part | |
| CN208638747U (en) | A kind of mineral insulation heating cable connector | |
| US20130098896A1 (en) | Heater Rod Comprising a Casing in Which at Least One Electrical Resistance Heating Element is Mounted | |
| CN207530127U (en) | A kind of conducting wire straight line connection structure | |
| CN201571211U (en) | Repaired joint of electric trace pipe | |
| CN101772226A (en) | Superfine armoured electric heating element with outgoing wire at one end | |
| CN202713645U (en) | Mineral-insulating heating cable joint | |
| JP4710315B2 (en) | Shielded wire, casing connected to it, method for connecting them, and shielded wire unit | |
| CN201422177Y (en) | Double-end outlet fine armored electric heating element | |
| EP3441672B1 (en) | Glow plug | |
| RU2533201C2 (en) | High-reliability cartridge-type heater for liquid-metal heat carrier | |
| JP6997731B2 (en) | Glow plug | |
| CN114641105B (en) | Axial non-uniform indirect electric heating rod based on double temperature sensors | |
| CN217215179U (en) | Switching device of thermocouple welding spot |
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 |