CN106369819B - A kind of casing tube type gas electric heater unit - Google Patents
A kind of casing tube type gas electric heater unit Download PDFInfo
- Publication number
- CN106369819B CN106369819B CN201610727998.4A CN201610727998A CN106369819B CN 106369819 B CN106369819 B CN 106369819B CN 201610727998 A CN201610727998 A CN 201610727998A CN 106369819 B CN106369819 B CN 106369819B
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- CN
- China
- Prior art keywords
- tube
- fin
- inner tube
- shell
- outer tube
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/002—Air heaters using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
- F24H9/0057—Guiding means
- F24H9/0063—Guiding means in air channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
Abstract
The invention discloses a kind of casing tube type gas electric heater units, including components such as air inlet, gas outlet, shell, inner tube, outer tube, heating wire, fin and heat insulation layers, above-mentioned gas electric heater unit is designed using sleeve type structure, inner tube is externally provided with spiral fin, gap of the heating wire between two adjacent spiral fins is wound in inner tube outer surface, outer tube is equipped on the outside of fin, entire casing is immobilized in the shell portion, heat insulation layer is arranged between outer tube and shell；Spiral winded type gas flow is constituted in the present invention between spiral fin and outer tube, increases gas flow length, apparatus of the present invention heating speed is fast, and gas is heated evenly；Being heated gas, first the wound form runner on the outside of inner tube flows through, it is heated to after certain temperature by being heated again on the inside of inner tube, outer tube wall temperature is relatively low, while heat insulation layer is arranged between electric heater unit shell and outer tube, radiation loss is reduced, the thermal efficiency of device is improved.
Description
Technical field
The invention belongs to technical field of heat exchangers, are related to a kind of electric gas heater, and in particular to a kind of casing tube type gas
Electric heater unit.
Background technique
Gas heater is a kind of with extensive heating equipment, according to the difference of heat gas, can refine and be divided into very much
Type, common are nitrogen heater, air heater etc., and gas heater has been widely used aerospace, weapons
Many research and production laboratories such as industry, chemical engineering industry and institution of higher learning.But in the technical solution of existing gas electrically heating device
The gas flow paths of bending are mostly used to design, although the gas flow channel compared to through type has extension gas flow paths
Effect, but path increases unobvious, at most doubles compared to using the channel of through type, heat exchanger effectiveness still compared with
It is low；Furthermore the cross-sectional area of gas flow channel is in structures such as rectangle, circle or ellipse or based on these structures mostly
Distressed structure, distance when air-flow passes through runner on the outside of air-flow to center is very long, on the outside of can be contacted with calandria, but
Air-flow middle position difficulty is contacted with calandria, and temperature is difficult to be changed in a very short period of time, causes the gas of output heated not
Uniformly, the gas temperature fluctuation of output is big, and gas flow rate is fast in the air delivering pipeline with pressure, uses above-mentioned electric heater unit
When gas and calandria time of contact with regard to shorter, therefore heat exchanger effectiveness will reduce, also just more obvious using defect.
It further include the big disadvantage of thermal losses in addition to above-mentioned technological deficiency, the insulating layer in common gases electric heater unit rises
Insulation effect reduces heat and sheds from shell losss, but the shell radial dimension of general heater is all larger, outside setting guarantor
Warm layer finite thickness, the heat of the heating member of concentrated setting is much larger than the heat that the insulating layer of the wall thickness can maintain, so that hot
Amount is lost easily from shell, so existing electric heater unit there are problems that significantly being lost.
Summary of the invention
It is logical by changing the technical problem to be solved by the present invention is to increase the length of gas flow channel in a limited space
Road structure realizes that gas is heated evenly, and reduces and distributes loss caused by heat as shell, the purpose of the present invention is to provide one
Kind heat exchanger effectiveness is high, is heated evenly, the electric heater unit for heat gas that thermal insulation property is strong.
The technical solution adopted by the present invention are as follows: a kind of casing tube type gas electric heater unit, described device include air inlet 1,
Gas outlet 12, shell 13, inner tube 2, outer tube 5, fin 4, heating wire 3, power supply line intake 6a, power supply line outlet 6b, insulation
Layer 7, lower perforated plate 8, sagging plate 9, upper end cover 10, upper perforated plate 11, gas outlet 12, shell 13 and lower cover 14；Wherein inner tube 2 with
Outer tube 5 is concentric locking collar tube designs, and the outer diameter of inner tube 2 is less than the internal diameter of outer tube 5, and fin 4 is fastened in the shape of a spiral in inner tube 2
The outer edge of outer surface, fin 4 is contacted with the inner surface of outer tube 5, and an annular is constituted on the inside of 2 outside of inner tube, fin 4, outer tube 5
Wound form gas flow；Heating wire 3 is armouring heating wire, gap spiral winding of the heating wire 3 between 4 two adjacent fins of fin
It is welded to connect in the outer surface of inner tube 2, and with 2 outer surface of inner tube, heating wire 3 is placed in wound form gas flow, can be to winding
The gas heating flowed in formula runner；Shell 13 is straight, which is provided with air inlet 1, gas outlet 12, power supply line intake
The casing heating element that 6a, power supply line outlet 6b, inner tube 2 and outer tube 5 form is fixed on inside shell 13 by tube sheet, outer tube
5 outsides and shell are equipped with heat insulation layer 7 between 13 inside, and air inlet 1 is fixedly connected on 13 side of shell, gas outlet 12 and upper end cover
10 are fixedly connected, and edge of a knife flanged joint are used between upper end cover 10 and shell 13, lower cover 14 and shell 13 weld, in inner tube 2
End is fixed on inside shell 13 by upper perforated plate 11, and 2 lower end of inner tube is fixed on inside shell 13 by lower perforated plate 8,5 upper end of outer tube
It is fixedly connected with sagging plate 9,5 lower end of outer tube is fixedly connected with lower perforated plate 8.
Further, inner tube 2, outer tube 5, fin 4 are all made of austenite heat-resistance steel alloy Incoloy 800H, 4 bottom of fin
Portion and 2 outer surface of inner tube are welded to connect.
Further, fin 4 and outer tube 5 use tolerance fit, and 4 top of fin is completely attached to 5 inner surface of outer tube, fin
The angle of climb and fin number very close to each other between 4 tops and 5 inner surface of outer tube, that fin 4 is wound can be designed according to device and be heated
The size of power suitably increases or reduces.
The principle of the invention lies in:
The flow channel of a kind of casing tube type gas electric heater unit of the present invention, gas is designed using sleeve type structure, the set
Pipe is divided into two layers, including outer tube 5 and inner tube 2, and the internal diameter of outer tube 5 is greater than the outer diameter of inner tube 2, the space between outer tube 5 and inner tube 2
Spiral wound formula runner is divided by fin 4；Heating wire 3 is armouring heating wire, and heating wire 3 is wound in 2 outer surface of inner tube, and
It is welded with 2 outer surface of inner tube, the height of heating wire 3 is less than the height of fin 4, it is wound in the gap between adjacent two fin,
The winding direction of heating wire 3 is identical as 4 direction of fin, and inner tube 2, fin 4 and outer tube 5 are all metal materials and use is welded and fixed
Connection type, heat transmission ability is big, and after heating wire is powered, outer tube 5, fin 4 and inner tube 2 are all rapidly heated, and all become
The heating surface of heat gas increases the heat exchange area between gas；Gas enters apparatus of the present invention by air inlet 1, first passes through
Wound form runner downward spiral flowing between outer tube 5 and inner tube 2, gas is by 5 inner surface of outer tube, fin during flowing
4, the outer surface heating of inner tube 2, gas flow channel length is several times of Straight-through heater, so that apparatus of the present invention heating speed
Degree is faster；After gas reaches apparatus of the present invention bottom along wound form runner, by 2 flows upward inside of inner tube, in flow process
In heated again by inner tube 2, flowed out eventually by gas outlet.
Heating wire 3 and inner tube 2, fin 4, outer tube 5 together constitute a bushing type heats in apparatus of the present invention, should
Heats is in the form of a column, and is fixed on inside shell 13 by upper perforated plate 11, middle tube sheet 9 and lower perforated plate 8 respectively, effluent in outer tube 5
Dynamic is the relatively low gas of the temperature that heats for the first time, and the high-temperature gas being heated again is from 2 internal flow of inner tube, Ci Zhongjie
Structure designs the temperature for advantageously reducing outer tube 5, and heat insulation layer is equipped between outer tube 5 and shell 13, and heat insulation layer is micro- using nanometer
Hole heat-insulating material, 1000 DEG C of maximum operation (service) temperature, 200~400kg/m of density3, 0.021~0.034W/m.k of thermal coefficient has
Effect reduces the radiation loss of apparatus of the present invention external environment, improves heating efficiency.
Of the invention having the prominent advantages that is designed using sleeve type structure, and helical fin and casing constitute winding stream
Road increases the heating surface (area) (HS of this electric heater unit and the flow channel length of gas, and heating speed is fast, and gas is heated evenly；Into this
The gas of invention device is flowed through winding on the outside of inner tube first, is heated rear high-temperature gas and is flowed from internal tube, outer tube wall temperature
Spend it is relatively low, while between electric heater unit shell and outer tube be equipped with heat insulation layer, reduce radiation loss, improve the heat of device
Efficiency.
Detailed description of the invention
Fig. 1 is a kind of casing tube type gas electric heater unit structure chart of the present invention；
Fig. 2 is a kind of casing tube type gas electric heater unit cannula structure detail drawing of the present invention.
In figure: 1 is air inlet；2 be inner tube；3 be heating wire；4 be fin；5 be outer tube；6a is power supply line intake；6b
For power supply line outlet；7 be heat insulation layer；8 be lower perforated plate；9 be sagging plate；10 be upper end cover；11 be upper perforated plate；12 be outlet
Mouthful；13 be shell；14 be lower cover.
Specific embodiment
With reference to the accompanying drawing and specific embodiment further illustrates the present invention.
As shown in Figure 1, the present invention is a kind of casing tube type gas electric heater unit, especially suitable for the gas pipeline with pressure
In, swiftly flowing gas is heated, the present invention is described further with reference to the accompanying drawing.A kind of casing tube type gas electricity
Heating device, including air inlet 1, inner tube 2, heating wire 3, fin 4, outer tube 5, power supply line intake 6a, power supply line outlet 6b,
Heat insulation layer 7, lower perforated plate 8, sagging plate 9, upper end cover 10, upper perforated plate 11, gas outlet 12, shell 13 and lower cover 14.
The flow channel of a kind of casing tube type gas electric heater unit of the present invention, gas is designed using sleeve type structure, the set
Pipe is divided into two layers, including outer tube 5 and inner tube 2, and the internal diameter of outer tube 5 is greater than the outer diameter of inner tube 2, the space between outer tube 5 and inner tube 2
Spiral wound formula runner is divided by fin 4, fin 4 and outer tube 5 use tolerance fit, 4 top of fin and 5 inner surface of outer tube
It completely attaches to, it is very close to each other between 4 top of fin and 5 inner surface of outer tube；Heating wire 3 is armouring heating wire, and heating wire 3 is wound in
2 outer surface of inner tube, and welded with 2 outer surface of inner tube, the height of heating wire 3 is less than the height of fin 4, is wound in adjacent two fin
Gap between, the winding direction of heating wire 3 is identical as 4 direction of fin, and inner tube 2, fin 4 and outer tube 5 are austenite heat-resistance
Steel alloy Incoloy 800H material, and welding connecting mode is used, thermal coefficient is big, after heating wire is powered, outer tube 5, wing
Piece 4 and 2 heating rate of inner tube are fast, all as the heating surface of heat gas, increase the heat exchange area between gas；Gas by
Air inlet 1 enters electric heater unit of the present invention, and gas first passes through the wound form runner downward spiral stream between outer tube 5 and inner tube 2
Dynamic, gas is by 5 inner surface of outer tube, the outer surface heating of fin 4, inner tube 2, wound form gas flow length during flowing
It is several times of through type electric heater, so that apparatus of the present invention heating speed is fast；Gas reaches apparatus of the present invention along winding runner
It behind bottom, by 2 flows upward inside of inner tube, is heated again by inner tube 2 in flow process, flows out this eventually by gas outlet
Invention device.
As shown in Fig. 2, heating wire 3 and inner tube 2, fin 4, outer tube 5 together constitute a bushing type in apparatus of the present invention
Heats, the heats are in the form of a column, and are fixed on inside shell 13 by upper perforated plate 11, middle tube sheet 9 and lower perforated plate 8 respectively,
What is flowed on the inside of outer tube 5 is the relatively low gas of the temperature that heats for the first time, and the high-temperature gas being heated again is inside inner tube 2
Flowing, such structure design are conducive to that outer tube 5 is made to be in relatively low temperature, and between 13 inside of 5 outside of outer tube and shell
Filled with heat insulation layer 7, heat insulation layer 7 uses nanometer micropore heat-insulating material, and 1000 DEG C of maximum operation (service) temperature, 200~400kg/ of density
m3, 0.021~0.034W/m.k of thermal coefficient effectively reduces the radiation loss of apparatus of the present invention external environment, improves
Device heating efficiency.
Claims (3)
1. a kind of casing tube type gas electric heater unit, it is characterised in that: described device includes air inlet (1), inner tube (2), outer tube
(5), fin (4), heating wire (3), power supply line intake (6a), power supply line outlet (6b), heat insulation layer (7), lower perforated plate (8),
Sagging plate (9), upper end cover (10), upper perforated plate (11), gas outlet (12), shell (13) and lower cover (14)；Wherein inner tube (2)
It is concentric locking collar tube designs with outer tube (5), the outer diameter of inner tube (2) is less than the internal diameter of outer tube (5), and fin (4) is wound in the shape of a spiral
Be fixed on inner tube (2) outer surface, the outer edge of fin (4) is contacted with the inner surface of outer tube (5), inner tube (2) outside, fin (4),
A ring-wound formula gas flow is constituted on the inside of outer tube (5)；Heating wire (3) is armouring heating wire, and heating wire (3) is along fin
(4) gap between two adjacent fins is helically wound around the outer surface of inner tube (2), and is welded to connect with inner tube (2) outer surface, electricity
Heated filament (3) is placed in wound form gas flow, is heated to the gas flowed through in wound form gas flow；Shell (13) is in straight tube
Shape, which is provided with air inlet (1), gas outlet (12), power supply line intake (6a), power supply line outlet (6b), inner tube (2) and outer
The casing heating element of pipe (5) composition is fixed on shell (13) inside, outer tube (5) outside and shell (13) inside by tube sheet
Between be equipped with heat insulation layer (7), air inlet (1) is fixedly connected on shell (13) side between upper perforated plate (11) and sagging plate (9),
Gas outlet (12) is fixedly connected with upper end cover (10), and edge of a knife flanged joint, lower end are used between upper end cover (10) and shell (13)
It covers (14) and shell (13) to weld, shell (13) inside, inner tube (2) lower end are fixed on by upper perforated plate (11) in inner tube (2) upper end
It is fixed on shell (13) inside by lower perforated plate (8), outer tube (5) upper end is fixedly connected with sagging plate (9), outer tube (5) lower end
It is fixedly connected with lower perforated plate (8).
2. a kind of casing tube type gas electric heater unit according to claim 1, it is characterised in that: inner tube (2), outer tube (5),
Fin (4) is all made of austenite heat-resistance steel alloy Incoloy800H, and fin (4) bottom and inner tube (2) outer surface are welded to connect.
3. a kind of casing tube type gas electric heater unit according to claim 1, it is characterised in that: at the top of fin (4) with outside
Very close to each other between the inner surface of pipe (5), the angle of climb and fin number of fin (4) winding can be according to heating device power demands
Appropriateness increases or reduces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610727998.4A CN106369819B (en) | 2016-08-25 | 2016-08-25 | A kind of casing tube type gas electric heater unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610727998.4A CN106369819B (en) | 2016-08-25 | 2016-08-25 | A kind of casing tube type gas electric heater unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106369819A CN106369819A (en) | 2017-02-01 |
| CN106369819B true CN106369819B (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610727998.4A Active CN106369819B (en) | 2016-08-25 | 2016-08-25 | A kind of casing tube type gas electric heater unit |
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| CN (1) | CN106369819B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668317A (en) * | 2017-10-13 | 2019-04-23 | 天津市华赛尔气体有限公司 | A kind of continous way gas-heating apparatus |
| CN110385006A (en) * | 2018-04-23 | 2019-10-29 | 宜兴市宜轻机械有限公司 | A kind of Novel condensation exhaust gas removal mechanism |
| RU2691891C1 (en) * | 2018-07-06 | 2019-06-18 | Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" | Unit of tubular electric heaters of equipment |
| CN113310211A (en) * | 2021-05-08 | 2021-08-27 | 中国核电工程有限公司 | Pit type gas heater and radioactive factory building system |
| CN113346626B (en) * | 2021-05-17 | 2023-06-20 | 西安交通大学 | Compressed air energy storage system with quick response module and operation method thereof |
| CN113834213B (en) * | 2021-09-18 | 2022-08-26 | 湖南骅骝新材料有限公司 | High-efficient safe high pressure nitrogen heater |
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| CN201291589Y (en) * | 2008-11-19 | 2009-08-19 | 周燕 | Inverse air intake hot air gun of hot melt sealing machine for plastic product |
| CN102840676A (en) * | 2012-09-19 | 2012-12-26 | 张剑锋 | Instant heating type electromagnetic water heater heating element with safe, efficient, and low electromagnetic radiation |
| CN103759406A (en) * | 2014-01-24 | 2014-04-30 | 陈国良 | Single-tank, double-pipe and bidirectional electric heating device and air energy instant electric water heater |
| CN204612135U (en) * | 2015-01-24 | 2015-09-02 | 吴新祥 | Water heater and the heat radiation comprised thereof utilize structure |
| CN204665658U (en) * | 2015-05-20 | 2015-09-23 | 河南莱帕克化工设备制造有限公司 | A kind of bushing type electric heater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013211581A1 (en) * | 2013-06-19 | 2014-12-24 | Behr Gmbh & Co. Kg | heater |
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2016
- 2016-08-25 CN CN201610727998.4A patent/CN106369819B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201291589Y (en) * | 2008-11-19 | 2009-08-19 | 周燕 | Inverse air intake hot air gun of hot melt sealing machine for plastic product |
| CN102840676A (en) * | 2012-09-19 | 2012-12-26 | 张剑锋 | Instant heating type electromagnetic water heater heating element with safe, efficient, and low electromagnetic radiation |
| CN103759406A (en) * | 2014-01-24 | 2014-04-30 | 陈国良 | Single-tank, double-pipe and bidirectional electric heating device and air energy instant electric water heater |
| CN204612135U (en) * | 2015-01-24 | 2015-09-02 | 吴新祥 | Water heater and the heat radiation comprised thereof utilize structure |
| CN204665658U (en) * | 2015-05-20 | 2015-09-23 | 河南莱帕克化工设备制造有限公司 | A kind of bushing type electric heater |
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| CN106369819A (en) | 2017-02-01 |
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