CN214960159U - Flexible bolt electric heater - Google Patents
Flexible bolt electric heater Download PDFInfo
- Publication number
- CN214960159U CN214960159U CN202120820739.2U CN202120820739U CN214960159U CN 214960159 U CN214960159 U CN 214960159U CN 202120820739 U CN202120820739 U CN 202120820739U CN 214960159 U CN214960159 U CN 214960159U
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- electric heater
- heating wire
- serial connection
- outer side
- connection unit
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Abstract
The utility model discloses a flexible bolt electric heater, which comprises a flexible support rod, a spiral heating wire, a plurality of high temperature resistant and insulated column cores, a plurality of high temperature resistant and insulated tubular shells and a lead-out wire; the column cores are connected in series on the supporting rod, and the heating wire is sleeved on the peripheries of the column cores; each cylindrical shell is sleeved on the periphery of one column core and forms a serial connection unit with the column core; the outgoing line is positioned on one side of the serial connection unit on the outermost side and is connected with the heating wire. The flexible bolt electric heater of the utility model has simple structure, reliability and good safety performance; wherein through the setting of concatenating on the bracing piece of a plurality of units of concatenating, realize electric heater's multi-angle bending, the heater is in the unit of concatenating with the heliciform is built-in, improves electric heater's heating efficiency, realizes superelevation heating temperature.
Description
Technical Field
The utility model relates to an electric heater especially relates to a flexible bolt electric heater.
Background
The bolt electric heater is an important auxiliary tool for mounting and dismounting large bolts, and particularly on certain large equipment in a nuclear power plant, in order to achieve the necessary pre-tightening force of the bolts, the bolts need to be heated by the electric heater to extend, and then the nuts are fastened according to the rotating arc length of the nuts, the rotating angles of the nuts or the absolute extension of the bolts.
The existing bolt electric heater is usually a single-head electric heating tube with a metal shell, the single-head electric heating tube is most commonly used as a heating component of the bolt electric heater, and the heating effect is also better. However, the single-head electric heating tube is not high in heating temperature and is usually a cylindrical straight tube, so that the bolt mounting hole is required to be a straight hole when the single-head electric heating tube is used for heating, and the single-head electric heating tube is not suitable for certain special-shaped bolts. When the heater insertion hole of the bolt is small and the heating temperature is required to be high, the common single-end pipe taking the metal material as the shell cannot meet the requirement.
Therefore, there is an urgent need for a bolt electric heater with an ultra-high heating temperature and a certain flexibility.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that, a flexible bolt electric heater that can multi-angle bending is provided.
The utility model provides a technical scheme that its technical problem adopted is: the flexible bolt electric heater comprises a bendable supporting rod, a spiral heating wire, a plurality of high-temperature-resistant and insulating column cores, a plurality of high-temperature-resistant and insulating cylindrical shells and a lead-out wire;
the column cores are connected in series on the supporting rod, and the heating wire is sleeved on the peripheries of the column cores; each cylindrical shell is sleeved on the periphery of one column core and forms a serial connection unit with the column core; the outgoing line is positioned on one side of the serial connection unit on the outermost side and is connected with the heating wire.
Preferably, opposite ends of the support rod are respectively exposed at end faces of the serial connection units located at the two outermost sides, and are adhered to the end faces by high-temperature-resistant ceramic glue.
Preferably, the support rod is a metal rod.
Preferably, the pillar core is a ceramic pillar core; the cylindrical shell is a ceramic shell.
Preferably, the column core is a diamond column core; the cylindrical shell is a diamond shell.
Preferably, the length of a plurality of the concatenation units is the same.
Preferably, the plurality of concatenation units are different in length.
Preferably, the two outgoing lines are respectively connected with two end parts of the heating wire.
Preferably, the two opposite end parts of the heating wire are respectively positioned in the serial connection units on two outermost sides, and the two outermost sides are divided into a first outer side and a second outer side;
the two outgoing lines are positioned on one side of the serial connection unit on the first outer side, one outgoing line is connected with one end part of the heating wire in the serial connection unit on the first outer side, and the other outgoing line extends through the plurality of serial connection units to the serial connection unit on the second outer side and is connected with the other end part of the heating wire.
Preferably, the two opposite end parts of the heating wire are respectively positioned in the serial connection units on two outermost sides, and the two outermost sides are divided into a first outer side and a second outer side;
one end part of the heating wire is positioned in the first outer side of the serial connection unit; the other end of the heating wire is positioned in the serial connection unit on the second outer side, extends through the plurality of serial connection units by bending and penetrates into the serial connection unit on the first outer side;
the two outgoing lines are located on one side of the first outer side of the serial connection unit and are respectively connected with the two end parts of the heating wire.
The flexible bolt electric heater of the utility model has simple structure, reliability and good safety performance; wherein, the multi-angle bending of the electric heater is realized by the serial connection of a plurality of serial connection units on the supporting rod; the heating wire is spirally built in the series connection unit, so that the heating efficiency of the electric heater is improved, and the ultrahigh heating temperature is realized.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a flexible bolt electric heater according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the flexible bolt electric heater according to an embodiment of the present invention includes a bendable support rod 10, a spiral heating wire 20, a plurality of high temperature resistant and insulating cores 30, a plurality of high temperature resistant and insulating tubular housings 40, and an outgoing line 50. The plurality of column cores 30 are connected in series on the support rod 10, and the heating wire 20 is sleeved on the peripheries of the plurality of column cores 30; each cylindrical shell 40 is sleeved on the periphery of a column core 30 and forms a serial connection unit with the column core 30; the outgoing line 50 is located at one side of the outermost one of the serial connection units and connected to the heating wire 20.
The support rod 10 is used as a connection and support structure of the whole electric heater, plays a role of connecting a plurality of series connection units in series, and realizes multi-angle bending of the whole electric heater through multi-angle bending of the support rod 10, and is flexible to apply.
Alternatively, the support rod 10 is a metal rod, and further may be formed of a stainless steel wire or a copper wire, or the like.
The wick 30 is a short cylindrical structure with respect to the entire electric heater. Each of the cores 30 is provided with a through-hole penetrating opposite ends thereof for the support rod 10 to pass through. The plurality of column cores 30 are connected in series on the support rod 10 through the matching of the through holes and the support rod 10, and every two adjacent column cores 30 can be abutted or in clearance fit and are not connected together.
The through hole may be located at the center of the core 30, or may be eccentrically located.
The cylindrical housing 40 is disposed corresponding to the column core 30, and is sleeved on the outer periphery of the column core 30 to form a serial connection unit therewith. The gap between the cylindrical case 40 and the column core 30 may be filled with an insulating paste such as a high-temperature-resistant ceramic paste, and the cylindrical case 40 and the column core 30 are bonded and fixed to each other. The number of the cylindrical shells 40 is the same as that of the column cores 30, and the number of the cylindrical shells is at least two, and the specific number can be increased or decreased according to the length of the required electric heater.
The plurality of cylindrical housings 40 are respectively sleeved on the peripheries of the plurality of column cores 30 to form a plurality of series-connection units connected in series on the support rod 10. The length of the plurality of concatenation units may be the same. The lengths of the plurality of concatenation units may also be different, such as having at least two lengths, and so on.
The opposite ends of the support bar 10 are respectively exposed at the end faces of the serial connection units located at the two outermost sides, and are adhered to the end faces by high temperature resistant ceramic glue.
As an alternative to high temperature resistance and insulation, the pillar core 30 may be a ceramic pillar core made of a ceramic material, and the cylindrical housing 40 may be a ceramic housing made of a ceramic material.
Preferably, the cylindrical core 30 is a corundum cylindrical core; the cylindrical case 40 is a diamond shell.
The heating wire 20 may be formed by spirally winding a heating wire (e.g., a copper wire). The heating wire 20 is a whole in the axial length, and is sleeved (spirally wound) on the peripheries of the plurality of column cores 30, and the part of the heating wire positioned on the periphery of the column core 30 is also sleeved in the sleeve of the cylindrical shell 40 on the column core 30. The outgoing line 50 is located outside the serial connection unit and is used for externally connecting a power supply, and the hair 20 is heated after being electrified.
Two lead wires 50 are provided corresponding to the positive and negative electrodes, and are connected to both end portions of the heater 20 by spot welding or the like.
In one embodiment, the two opposite ends of the heating wire 20 are respectively located in two outermost serial units, and the two outermost units are divided into a first outer side and a second outer side. Two outgoing lines 50 are located at one side of the first outer side of the serial connection unit, wherein one outgoing line 50 is connected to one end of the heating wire 20 in the first outer side of the serial connection unit, and the other outgoing line 50 extends through a plurality of serial connection units to the second outer side of the serial connection unit and is connected to the other end of the heating wire 20.
In another embodiment, the opposite ends of the heating wire 20 are respectively located in two outermost tandem units, and the two outermost units are divided into a first outer side and a second outer side. One end of the heating wire 20 is located in the first outer concatenation unit; the other end of the heating wire 20 is located in the second outer side of the tandem unit, and extends through the plurality of tandem units to the first outer side of the tandem unit by bending. The two outgoing lines 50 are located at the first outer side of the serial connection unit and are connected to the two ends of the heating wire 20, respectively.
In addition, the heating wire 20 is subjected to special insulation treatment, so that an insulation protection layer is formed on the surface of the heating wire 20, the insulation performance of the electric heater is improved, the high-temperature oxidation speed of the heating wire 20 is reduced, the electric heating leakage current of the flexible bolt is effectively reduced, and the use safety and reliability of the electric heater of the flexible bolt are ensured.
The utility model discloses a flexible bolt electric heater is during the use, not only is applicable to straight hole, still is applicable to the hole in non-straight holes such as crooked hole.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A flexible bolt electric heater is characterized by comprising a bendable support rod, a spiral heating wire, a plurality of high-temperature-resistant and insulating column cores, a plurality of high-temperature-resistant and insulating cylindrical shells and a lead-out wire;
the column cores are connected in series on the supporting rod, and the heating wire is sleeved on the peripheries of the column cores; each cylindrical shell is sleeved on the periphery of one column core and forms a serial connection unit with the column core; the outgoing line is positioned on one side of the serial connection unit on the outermost side and is connected with the heating wire.
2. The flexible bolt electric heater according to claim 1, wherein the opposite ends of the support rod are respectively exposed at the end surfaces of the tandem units located at the two outermost sides, and are adhered to the end surfaces by high temperature resistant ceramic glue.
3. The flexible bolt electric heater of claim 1, wherein the support rod is a metal rod.
4. The flexible bolt electric heater of claim 1, wherein the pillar core is a ceramic pillar core; the cylindrical shell is a ceramic shell.
5. The flexible bolt electric heater of claim 1, wherein the post core is a diamond spar post core; the cylindrical shell is a diamond shell.
6. The flexible bolt electric heater of claim 1, wherein the plurality of tandem units are the same length.
7. The flexible bolt electric heater of claim 1, wherein the plurality of tandem units differ in length.
8. The flexible bolt electric heater according to any one of claims 1-7, wherein two lead wires are provided and are connected to both ends of the heating wire, respectively.
9. The flexible bolt electric heater according to claim 8, wherein the opposite ends of the heating wire are respectively located in the concatenation units at two outermost sides, the two outermost sides being divided into a first outer side and a second outer side;
the two outgoing lines are positioned on one side of the serial connection unit on the first outer side, one outgoing line is connected with one end part of the heating wire in the serial connection unit on the first outer side, and the other outgoing line extends through the plurality of serial connection units to the serial connection unit on the second outer side and is connected with the other end part of the heating wire.
10. The flexible bolt electric heater according to claim 8, wherein the opposite ends of the heating wire are respectively located in the concatenation units at two outermost sides, the two outermost sides being divided into a first outer side and a second outer side;
one end part of the heating wire is positioned in the first outer side of the serial connection unit; the other end of the heating wire is positioned in the serial connection unit on the second outer side, extends through the plurality of serial connection units by bending and penetrates into the serial connection unit on the first outer side;
the two outgoing lines are located on one side of the first outer side of the serial connection unit and are respectively connected with the two end parts of the heating wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120820739.2U CN214960159U (en) | 2021-04-21 | 2021-04-21 | Flexible bolt electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120820739.2U CN214960159U (en) | 2021-04-21 | 2021-04-21 | Flexible bolt electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214960159U true CN214960159U (en) | 2021-11-30 |
Family
ID=79043406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120820739.2U Active CN214960159U (en) | 2021-04-21 | 2021-04-21 | Flexible bolt electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214960159U (en) |
-
2021
- 2021-04-21 CN CN202120820739.2U patent/CN214960159U/en active Active
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