CN108200673A - A kind of high pressure resistant electric heater of low temperature and its manufacturing method - Google Patents
A kind of high pressure resistant electric heater of low temperature and its manufacturing method Download PDFInfo
- Publication number
- CN108200673A CN108200673A CN201810066412.3A CN201810066412A CN108200673A CN 108200673 A CN108200673 A CN 108200673A CN 201810066412 A CN201810066412 A CN 201810066412A CN 108200673 A CN108200673 A CN 108200673A
- Authority
- CN
- China
- Prior art keywords
- electrothermal tube
- middle pipe
- conductive
- electric heater
- high pressure
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000003754 machining Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000741 silica gel Substances 0.000 claims abstract description 5
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 5
- 230000004323 axial length Effects 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 abstract description 7
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
-
- 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
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes
Landscapes
- Resistance Heating (AREA)
Abstract
The invention discloses a kind of high pressure resistant electric heater of low temperature and its manufacturing method in electric heater unit field, manufacturing method includes step：Prepare electrothermal tube, resistance wire, conductive eduction rod and the guarantor's middle pipe of corresponding length, conductive eduction rod is connected respectively at the both ends of resistance wire, middle pipe will be protected and placed vertically, resistance wire is stretched into guarantor's middle pipe；Electrothermal tube is placed vertically, lifting is protected middle pipe and stretched into electrothermal tube, and magnesia powder is filled into electrothermal tube, and middle pipe is kept to be in centering, will protect middle pipe and removes electrothermal tube, resistance test is carried out to electrothermal tube, by electrothermal tube undergauge, axial length scale；The bending machining forming of installation radiating fin is wound in electrothermal tube periphery；To electrothermal tube humidity discharging, by the nozzle silica gel sealing of electrothermal tube, insulated terminal and conductive rod fastener are installed in the sealed end of electrothermal tube.Electric heater is process using the above method.The present invention can avoid breakdown in impacting with high pressure lower electrothermal tube wall side, and heat supply is prevented to be interrupted, prevents personal safety hidden danger.
Description
Technical field
The invention belongs to electric heater unit field, the high pressure resistant electric heater of more particularly to a kind of low temperature and its manufacturing method.
Background technology
Electrothermal tube is a kind of special electric elements for converting electrical energy into thermal energy.In the prior art, there is a kind of electrothermal tube,
Structure includes metal tube envelope, is equipped with lectrothermal alloy wire along central axial inside metal tube, is equipped at nozzle and is connected with resistance wire
The conductive rod connect is equipped with magnesia powder, the nozzle both ends silica gel sealing of metal tube between lectrothermal alloy wire and inner wall of metal tube.
When electrothermal tube works, conductive rod is connected with power supply, and resistance generates heat after being powered, and electrothermal tube can be used for heat medium（Oil, gas,
Water）And metal die etc..
At present, high ferro motor-car is run from low temperature environment to psychro-environment in whole process, passes through the input power to electric heater
Intelligent control is carried out, realizes that the people in compartment obtains suitable temperature, heat source is supplied to heater by electric heater, and heater will
Hot temperature is distributed in case.Electric heater of the prior art is disadvantageous in that：Electric heater is in high ferro motor-car 600V voltages
It is applied under operating mode, to bear the impacting with high pressure of 3750V, due to the gap between lectrothermal alloy wire and the periphery of inner wall of metal tube not
Deng, metal pipe-wall side is easily breakdown or flicker；Realize that 1min does not puncture, the particular/special requirement of flicker free is to be extremely difficult to
, heat supply interruption often occurs or personal safety hidden danger occurs.
Invention content
An object of the present invention is to provide a kind of manufacturing method of the high pressure resistant electric heater of low temperature, and resistance wire is limited in
The coaxial position with electrothermal tube, it is ensured that resistance wire periphery and electrothermal tube periphery of inner wall are equidistant, are filled between resistance wire and electrothermal tube
More magnesia powders, avoid impacting with high pressure lower electrothermal tube wall side it is breakdown or flicker, heat supply is prevented to be interrupted, prevents the person
Security risk.
The object of the present invention is achieved like this：A kind of manufacturing method of the high pressure resistant electric heater of low temperature, it is characterised in that
Include the following steps：
（1）It imports and protects middle pipe：Prepare electrothermal tube, resistance wire, conductive eduction rod and the guarantor's middle pipe of corresponding length, the two of resistance wire
End is respectively fixedly connected with 1 conductive eduction rod so that resistance wire is overlapped with the axis of 2 conductive eduction rods, vertical by middle pipe is protected
It places, resistance wire is extended downwardly into and protected in middle pipe by lifting upper conductive eduction rod so that the lower end of underlying conductive eduction rod is stretched out
The lower end nozzle of middle pipe is protected, upper conductive eduction rod, which stretches into, to be protected inside middle pipe, and resistance wire is overlapped with protecting the axis of middle pipe；
（2）Import electrothermal tube：Electrothermal tube is placed vertically, is blocked the lower end nozzle of electrothermal tube with lower end cap, middle pipe is protected in lifting
And coaxially stretch into electrothermal tube downwards so that protect middle pipe lower end and contacted with lower end cap, the lower end of underlying conductive eduction rod passes through down
Through-hole on plug simultaneously extends downwardly, and the upper end of upper conductive eduction rod is located above the upper end tube nozzle of electrothermal tube；
（3）Fill magnesia powder：Magnesia powder is filled into electrothermal tube by protecting the circular passage between middle pipe and electrothermal tube, is protected
It holds and protects middle pipe and be in Shaft alignment state, most guarantor's middle pipe removes electrothermal tube vertically at last, then with upper plug head by the upper end tube nozzle of electrothermal tube
It blocks；
（4）The draw and scale：Resistance test is carried out to electrothermal tube, by electrothermal tube undergauge, to the axial length scale of electrothermal tube；
（5）Forming elbow：Installation radiating fin is wound in electrothermal tube periphery, electrothermal tube bending machining is shaped；
（6）Humidity discharging sealing：To electrothermal tube humidity discharging, take out upper plug head and lower end cap, by the nozzle of electrothermal tube and conductive eduction rod it
Between gap silica gel sealing, then insulated terminal and conductive rod fastener are installed in the sealed end of electrothermal tube.
Compared with prior art, the beneficial effects of the present invention are：When resistance wire is imported electrothermal tube, guarantor's middle pipe is resistance
Silk provides guiding, makes it coaxial with electrothermal tube by adjusting middle pipe is protected, can since resistance wire and guarantor's middle pipe are also at coaxial position
Ensure that resistance wire and electrothermal tube are also coaxial, it is ensured that resistance wire periphery and electrothermal tube periphery of inner wall are equidistant；After magnesia powder filling again
The draw fixes the position of resistance wire, and resistance wire periphery and the gap of electric heating inside pipe wall will not change, always equidistantly；Resistance wire
More magnesia powders can be filled between electrothermal tube, insulation performance is more reliable, it is ensured that during the high pressure resistant impact of electrothermal tube
Safety, avoid the side of impacting with high pressure lower electrothermal tube wall it is breakdown or flicker, heat supply is prevented to be interrupted, it is hidden to prevent personal safety
Suffer from.
As a further improvement on the present invention, guarantor's middle pipe includes coaxial path section and supporting section, and supporting section is located at
The lower section of path section, the outer diameter of internal diameter and resistance wire for protecting middle pipe path section match, and protect the outer diameter and electric heating of middle pipe supporting section
The internal diameter of pipe matches.When middle pipe is protected in lifting, resistance wire will not slide in middle pipe is protected, and resistance wire be stretched into after protecting middle pipe, electricity
The relative position of resistance silk and electric heating inside pipe wall will not change, and protect middle pipe supporting section and match with electrothermal tube, convenient for that will protect middle pipe tune
It is whole to arrive the position coaxial with electrothermal tube.
As a further improvement on the present invention, the resistance wire is spiral shape, and conductive eduction rod is close to one end of resistance wire
Equipped with external screw thread, ressitance spiral is threadedly coupled, and spot welding is fixed with conductive eduction rod, and the internal diameter of ressitance spiral is less than
The conductive externally threaded outer diameter of eduction rod.Threaded connection is added some points, and to ensure that resistance wire is connected with conductive eduction rod relatively reliable for weldering；By spiral shell
Rotation shape resistance wire is adjusted to coaxially more convenient with guarantor's middle pipe；Conductive eduction rod, forming after ressitance spiral outer diameter it is excellent
Change design, make electric heating inside pipe wall unilateral there are enough space filling magnesia powders with ressitance spiral outer diameter, improve insulation
Performance.
As a further improvement on the present invention, the cross section for protecting middle pipe path section is circle, protects middle pipe supporting section
Cross section is along 3 ~ 6 circumferentially uniformly distributed support ribs of guarantor's middle pipe path section, when protecting middle pipe importing electrothermal tube, protects middle pipe path section
There are the radial clearances of 4.5 ~ 5.5mm between outer wall and electric heating inside pipe wall, and also there are gaps between support rib and electric heating inside pipe wall.
Radial clearance ensures the magnesia powder of filling sufficient amount in electrothermal tube, there is support rib positioning to join for protecting middle pipe adjustment position
The effect of examining, the position convenient for protecting middle pipe are adjusted to coaxial with electrothermal tube, and magnesia powder is fallen on from the channel between adjacent support rib
Electric heating bottom of the tube ensures that magnesia powder is uniformly distributed in electrothermal tube.
As a further improvement on the present invention, the step（3）In, magnesia powder is 50 ~ 70 mesh, is filled into electrothermal tube
While magnesia powder, lifting upwards protects middle pipe and slowly removes electrothermal tube by middle pipe is protected, and magnesia powder is between adjacent support rib
Blanking channel enter electric heating bottom of the tube, until magnesia powder be full of electrothermal tube.Preferentially through contracting after the magnesia powder filling of mesh number
Pipe is firmer, closely knit, which can ensure that the full electrothermal tube of magnesia powder filling, and the position for protecting middle pipe is avoided to fill less than oxygen
Change magnesium powder.
As a further improvement on the present invention, the step（3）In, magnesia powder is 50 ~ 70 mesh, and filling magnesia powder is straight
To magnesia powder full of electrothermal tube, then middle pipe will be protected and remove electrothermal tube.Program filling is convenient, makes the efficiency of electrothermal tube more
It is high.
As a preference of the present invention, the step（4）In, 3700 ~ 3800V resistance tests are carried out to electrothermal tube, by electric heating
The caliber of pipe narrows down to 12 ~ 18mm.
As a preference of the present invention, the step（5）Middle radiating fin uses 304 stainless steels, and electrothermal tube is processed
For W-shaped, U-shaped, N shapes, S-shaped or vertical bar shaped.
As a preference of the present invention, the step（6）In, electrothermal tube is placed in 320 ~ 380 DEG C of environment, carries out humidity discharging.
The second object of the present invention is to provide a kind of low temperature high pressure resistant electric heater, heater can not given in compartment continuously not
Heat source is provided disconnectedly, and impacting with high pressure can be born, more securely and reliably.
The object of the present invention is achieved like this：A kind of high pressure resistant electric heater of low temperature, the electric heater is using above-mentioned
Manufacturing method is process.
Compared with prior art, the beneficial effects of the present invention are：It is adjusted by the input power to electric heater,
Distributing temperature in case for heater can intelligent control so that the people in compartment is in comfortable temperature.This electric heater energy
It is enough continuously to provide heat source, and impacting with high pressure be born to heater in compartment, more securely and reliably.
Description of the drawings
Fig. 1 is the structure diagram for protecting middle pipe.
Fig. 2 is the sectional view along AA of Fig. 1.
Fig. 3 is that resistance wire stretches into the structure diagram for protecting middle pipe.
Fig. 4 is to protect the structure diagram that middle pipe stretches into electrothermal tube.
Fig. 5 is BB in Fig. 4 to sectional view.
Fig. 6 is the structure diagram for filling magnesia powder.
Fig. 7 is the structure diagram that electrothermal tube bending machining is W types.
Fig. 8 is that electrothermal tube bending machining is U-shaped structure diagram.
Wherein, 1 electrothermal tube, 2 resistance wires, 3 conductive eduction rods, 4 protect middle pipe, 401 path sections, 402 supporting sections, 402a supports
Rib, 5 lower end caps, 6 upper plug heads, 7 magnesia powders, 8 radiating fins, 9 insulated terminals, 10 conductive rod fasteners.
Specific embodiment
As shown in figures 1-8, the manufacturing method of the high pressure resistant electric heater of a kind of low temperature, includes the following steps：
（1）It imports and protects middle pipe：Prepare electrothermal tube 1, resistance wire 2, conductive eduction rod 3 and the guarantor's middle pipe 4 of corresponding length, protect middle pipe 4
Including coaxial path section 401 and supporting section 402, supporting section 402 is located at the lower section of path section 401, protects 4 path section 401 of middle pipe
The outer diameter of internal diameter and resistance wire 2 match, the internal diameter for protecting the outer diameter and electrothermal tube 1 of 4 supporting section 402 of middle pipe matches；In electricity
The both ends of resistance silk 2 are respectively fixedly connected with 1 conductive eduction rod 3, and resistance wire 2 is spiral shape, and conductive eduction rod 3 is close to resistance wire 2
One end be equipped with external screw thread, ressitance spiral 2 with conduction eduction rod 3 be threadedly coupled, and spot welding is fixed, ressitance spiral 2
Internal diameter be less than conductive 3 externally threaded outer diameter of eduction rod；So that resistance wire 2 is overlapped with the axis of 2 conductive eduction rods 3, will protect
Middle pipe 4 is placed vertically, and lifting upper conductive eduction rod 3, which extends downwardly into resistance wire 2, to be protected in middle pipe 4 so that underlying conductive is drawn
The lower end nozzle for protecting middle pipe 4 is stretched out in the lower end of stick 3, and upper conductive eduction rod 3, which stretches into, to be protected inside middle pipe 4, and resistance wire 2 is with protecting middle pipe
4 axis overlaps；
（2）Import electrothermal tube：Electrothermal tube 1 is placed vertically, is blocked the lower end nozzle of electrothermal tube 1 with lower end cap 5, during lifting is protected
Pipe 4 is simultaneously coaxially stretched into electrothermal tube 1 downwards so that and it protects 4 lower end of middle pipe and is contacted with lower end cap 5, the lower end of underlying conductive eduction rod 3
It across the through-hole on lower end cap 5 and extends downwardly, the upper end of upper conductive eduction rod 3 is located above the upper end tube nozzle of electrothermal tube 1；
The cross section of guarantor's 4 path section 401 of middle pipe is circle, and the cross section for protecting 4 supporting section 402 of middle pipe is that 4 path section of middle pipe is protected 401 weeks in edge
To 3 ~ 6 uniformly distributed support rib 402a, when protecting the importing electrothermal tube 1 of middle pipe 4, the outer wall of 4 path section 401 of middle pipe and electrothermal tube 1 are protected
There are the radial clearance of 4.5 ~ 5.5mm between inner wall, also there are gaps between 1 inner wall of support rib 402a and electrothermal tube；
（3）Fill magnesia powder：Magnesia powder 7 is filled into electrothermal tube by protecting the circular passage between middle pipe 4 and electrothermal tube 1
1, middle pipe 4 is kept be in Shaft alignment state, most protects the vertical removal electrothermal tube 1 of middle pipe 4 at last, then with upper plug head 6 by electrothermal tube 1
Upper end tube nozzle is blocked；Magnesia powder is 50 ~ 70 mesh, and while magnesia powder 7 are filled into electrothermal tube 1, middle pipe 4 is protected in lifting upwards
Middle pipe 4 will be protected and slowly remove electrothermal tube 1, magnesia powder 7 enters 1 bottom of electrothermal tube from the blanking channel between adjacent support rib 402a
Portion, until magnesia powder 7 is full of electrothermal tube 1；
（4）The draw and scale：3700 ~ 3800V resistance tests are carried out to electrothermal tube 1, the caliber of electrothermal tube 1 is narrowed down to 12 ~
18mm, to the axial length scale of electrothermal tube 1；
（5）Forming elbow：Installation radiating fin 8 is wound in 1 periphery of electrothermal tube, 1 bending machining of electrothermal tube is shaped；Radiating fin
8 use 304 stainless steels, and electrothermal tube 1 is processed as W-shaped, U-shaped, N shapes, S-shaped or vertical bar shaped；
（6）Humidity discharging sealing：Electrothermal tube 1 is placed in 320 ~ 380 DEG C of environment, carries out humidity discharging, takes out upper plug head 6 and lower end cap 5, it will
Gap silica gel sealing between the nozzle of electrothermal tube 1 and conductive eduction rod 3, then insulating end is installed in the sealed end of electrothermal tube 1
Son 9 and conductive rod fastener 10.
A kind of high pressure resistant electric heater of low temperature, is process using above-mentioned manufacturing method.
When resistance wire 2 is imported electrothermal tube 1, protect middle pipe 4 and provide guiding for resistance wire 2, by adjusting protect middle pipe 4 make its with
Electrothermal tube 1 is coaxial, since resistance wire 2 and guarantor's middle pipe 4 are also at coaxial position, it is ensured that and resistance wire 2 is also coaxial with electrothermal tube 1,
Ensure that 2 periphery of resistance wire and 1 periphery of inner wall of electrothermal tube are equidistant；The draw again after magnesia powder 7 is filled, the position of resistance wire 2 is consolidated
Fixed, 2 periphery of resistance wire and the gap of 1 inner wall of electrothermal tube will not change, always equidistantly；It can be filled out between resistance wire 2 and electrothermal tube 1
More magnesia powders 7 are filled, insulation performance is more reliable, it is ensured that safety during the high pressure resistant impact of electrothermal tube avoids rushing in high pressure
Hit lower electrothermal tube wall side it is breakdown or flicker, heat supply is prevented to be interrupted, prevents personal safety hidden danger.By to electric heater
Input power is adjusted, and distributing temperature in case for heater can intelligent control so that the people in compartment is in comfortable
Temperature.This electric heater can continuously provide heat source to heater in compartment, and can bear impacting with high pressure, safer
Reliably.
The invention is not limited in above-described embodiments, such as the step（3）In, magnesia powder is 50 ~ 70 mesh, fills oxygen
Change magnesium powder 7 until magnesia powder 7 is full of electrothermal tube 1, then removes electrothermal tube 1 by middle pipe 4 is protected.Program filling is convenient, makes electricity
Heat pipe it is more efficient.On the basis of technical solution disclosed by the invention, those skilled in the art is according to disclosed skill
Art content, some of which technical characteristic can be made some replacements and deformation by not needing to performing creative labour, these are replaced
It changes and deforms and is within the scope of the present invention.
Claims (10)
1. a kind of manufacturing method of the high pressure resistant electric heater of low temperature, it is characterised in that include the following steps：
（1）It imports and protects middle pipe：Prepare electrothermal tube, resistance wire, conductive eduction rod and the guarantor's middle pipe of corresponding length, the two of resistance wire
End is respectively fixedly connected with 1 conductive eduction rod so that resistance wire is overlapped with the axis of 2 conductive eduction rods, vertical by middle pipe is protected
It places, resistance wire is extended downwardly into and protected in middle pipe by lifting upper conductive eduction rod so that the lower end of underlying conductive eduction rod is stretched out
The lower end nozzle of middle pipe is protected, upper conductive eduction rod, which stretches into, to be protected inside middle pipe, and resistance wire is overlapped with protecting the axis of middle pipe；
（2）Import electrothermal tube：Electrothermal tube is placed vertically, is blocked the lower end nozzle of electrothermal tube with lower end cap, middle pipe is protected in lifting
And coaxially stretch into electrothermal tube downwards so that protect middle pipe lower end and contacted with lower end cap, the lower end of underlying conductive eduction rod passes through down
Through-hole on plug simultaneously extends downwardly, and the upper end of upper conductive eduction rod is located above the upper end tube nozzle of electrothermal tube；
（3）Fill magnesia powder：Magnesia powder is filled into electrothermal tube by protecting the circular passage between middle pipe and electrothermal tube, is protected
It holds and protects middle pipe and be in Shaft alignment state, most guarantor's middle pipe removes electrothermal tube vertically at last, then with upper plug head by the upper end tube nozzle of electrothermal tube
It blocks；
（4）The draw and scale：Resistance test is carried out to electrothermal tube, by electrothermal tube undergauge, to the axial length scale of electrothermal tube；
（5）Forming elbow：Installation radiating fin is wound in electrothermal tube periphery, electrothermal tube bending machining is shaped；
（6）Humidity discharging sealing：To electrothermal tube humidity discharging, take out upper plug head and lower end cap, by the nozzle of electrothermal tube and conductive eduction rod it
Between gap silica gel sealing, then insulated terminal and conductive rod fastener are installed in the sealed end of electrothermal tube.
2. the manufacturing method of the high pressure resistant electric heater of a kind of low temperature according to claim 1, which is characterized in that in the guarantor
Pipe includes coaxial path section and supporting section, and supporting section is located at the lower section of path section, protects the internal diameter and resistance wire of middle pipe path section
Outer diameter match, the outer diameter and the internal diameter of electrothermal tube for protecting middle pipe supporting section match.
A kind of 3. manufacturing method of the high pressure resistant electric heater of low temperature according to claim 2, which is characterized in that the resistance
Silk is spiral shape, and conductive eduction rod is equipped with external screw thread, ressitance spiral and conductive eduction rod screw thread close to one end of resistance wire
Connection, and spot welding is fixed, the internal diameter of ressitance spiral is less than the externally threaded outer diameter of conductive eduction rod.
4. the manufacturing method of the high pressure resistant electric heater of a kind of low temperature according to Claims 2 or 3, which is characterized in that described
The cross section of guarantor's middle pipe path section is circle, and the cross section for protecting middle pipe supporting section is that circumferentially uniformly distributed 3 ~ 6 of middle pipe path section are protected on edge
A support rib, when protecting middle pipe importing electrothermal tube, there are 4.5 ~ 5.5mm's between guarantor's outer wall of middle pipe path section and electric heating inside pipe wall
Radial clearance, also there are gaps between support rib and electric heating inside pipe wall.
A kind of 5. manufacturing method of the high pressure resistant electric heater of low temperature according to claim 4, which is characterized in that the step
（3）In, magnesia powder is 50 ~ 70 mesh, and while magnesia powder is filled into electrothermal tube, lifting upwards is protected middle pipe and delayed middle pipe is protected
Slow to remove electrothermal tube, magnesia powder enters electric heating bottom of the tube from the blanking channel between adjacent support rib, until magnesia powder fills
Full electrothermal tube.
A kind of 6. manufacturing method of the high pressure resistant electric heater of low temperature according to claim 4, which is characterized in that the step
（3）In, magnesia powder is 50 ~ 70 mesh, and filling magnesia powder is until magnesia powder removes electric heating full of electrothermal tube, then by middle pipe is protected
Pipe.
7. a kind of manufacturing method of the high pressure resistant electric heater of low temperature according to claim 1-3 any one, feature exist
In the step（4）In, 3700 ~ 3800V resistance tests are carried out to electrothermal tube, the caliber of electrothermal tube is narrowed down into 12 ~ 18mm.
8. a kind of manufacturing method of the high pressure resistant electric heater of low temperature according to claim 1-3 any one, feature exist
In the step（5）Middle radiating fin uses 304 stainless steels, and electrothermal tube is processed as W-shaped, U-shaped, N shapes, S-shaped or vertical bar
Shape.
9. a kind of manufacturing method of the high pressure resistant electric heater of low temperature according to claim 1-3 any one, feature exist
In the step（6）In, electrothermal tube is placed in 320 ~ 380 DEG C of environment, carries out humidity discharging.
10. a kind of high pressure resistant electric heater of low temperature, which is characterized in that the electric heater uses claim 1-9 any one
The manufacturing method is process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810066412.3A CN108200673B (en) | 2018-01-24 | 2018-01-24 | Low-temperature high-pressure-resistant electric heater and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810066412.3A CN108200673B (en) | 2018-01-24 | 2018-01-24 | Low-temperature high-pressure-resistant electric heater and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN108200673A true CN108200673A (en) | 2018-06-22 |
| CN108200673B CN108200673B (en) | 2024-03-26 |
Family
ID=62590522
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041305A (en) * | 2018-08-21 | 2018-12-18 | 镇江裕太防爆电加热器有限公司 | A kind of U-shaped electric heating tube production method |
| CN109379791A (en) * | 2018-10-29 | 2019-02-22 | 安徽苏立科技股份有限公司 | A kind of electric heating pipe processing technique |
| CN109686517A (en) * | 2018-11-30 | 2019-04-26 | 湖南福德电气有限公司 | A kind of metal tube resistor manufacturing method |
| CN110381615A (en) * | 2019-07-22 | 2019-10-25 | 宁波国创机车装备有限公司 | A kind of rail vehicle stucco system heating tube and its manufacturing method |
| CN112738932A (en) * | 2021-02-01 | 2021-04-30 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
| CN113909642A (en) * | 2021-10-25 | 2022-01-11 | 宁波江丰电子材料股份有限公司 | Connecting method of aluminum rotary target material |
| CN113939050A (en) * | 2021-10-13 | 2022-01-14 | 美迪斯智能装备有限公司 | Dehumidification method for electric heating tube |
| CN114585121A (en) * | 2020-12-01 | 2022-06-03 | 周卫斌 | Powder-adding center-protecting conduit and large-length electric heating tube assembly line using same |
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| CN109041305B (en) * | 2018-08-21 | 2024-09-13 | 镇江裕太防爆电加热器有限公司 | U-shaped electric heating pipe production method |
| CN109041305A (en) * | 2018-08-21 | 2018-12-18 | 镇江裕太防爆电加热器有限公司 | A kind of U-shaped electric heating tube production method |
| CN109379791B (en) * | 2018-10-29 | 2022-06-17 | 安徽苏立科技股份有限公司 | Electric heating tube machining process |
| CN109379791A (en) * | 2018-10-29 | 2019-02-22 | 安徽苏立科技股份有限公司 | A kind of electric heating pipe processing technique |
| CN109686517A (en) * | 2018-11-30 | 2019-04-26 | 湖南福德电气有限公司 | A kind of metal tube resistor manufacturing method |
| CN110381615A (en) * | 2019-07-22 | 2019-10-25 | 宁波国创机车装备有限公司 | A kind of rail vehicle stucco system heating tube and its manufacturing method |
| CN114585121B (en) * | 2020-12-01 | 2024-04-09 | 周卫斌 | Powder adding middle-protection conduit and long-length electric heating tube assembly line using same |
| CN114585121A (en) * | 2020-12-01 | 2022-06-03 | 周卫斌 | Powder-adding center-protecting conduit and large-length electric heating tube assembly line using same |
| CN112738932B (en) * | 2021-02-01 | 2022-09-27 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
| CN112738932A (en) * | 2021-02-01 | 2021-04-30 | 广东金顺电器有限公司 | Dustless mounting hole reserving process for electric heating tube |
| CN113939050A (en) * | 2021-10-13 | 2022-01-14 | 美迪斯智能装备有限公司 | Dehumidification method for electric heating tube |
| CN113909642B (en) * | 2021-10-25 | 2023-02-28 | 宁波江丰电子材料股份有限公司 | Connecting method of aluminum rotary target |
| CN113909642A (en) * | 2021-10-25 | 2022-01-11 | 宁波江丰电子材料股份有限公司 | Connecting method of aluminum rotary target material |
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