CN207674409U - A kind of steam generator of vacuum heat-insulating plate thickness change - Google Patents
A kind of steam generator of vacuum heat-insulating plate thickness change Download PDFInfo
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- CN207674409U CN207674409U CN201721177575.6U CN201721177575U CN207674409U CN 207674409 U CN207674409 U CN 207674409U CN 201721177575 U CN201721177575 U CN 201721177575U CN 207674409 U CN207674409 U CN 207674409U
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Abstract
The utility model provides a kind of steam generator of vacuum heat-insulating plate thickness change, the steam generator includes babinet, electric heating tube, cold water inlet and steam (vapor) outlet, the babinet includes vertical portion and horizontal component, the vertical portion includes inner and outer wall, vacuum heat-insulating plate is set between the inner and outer wall, thermal insulation material is filled in space between vacuum heat-insulating plate, inner and outer wall, the thickness of the vacuum heat-insulating plate is different, along the short transverse of vertical portion, the thickness of vacuum heat-insulating plate constantly increases.The steam generator of the utility model can reduce the cost of evaporator by the design of the variation of vacuum insulation plate thickness in short transverse while realizing essentially identical insulating efficiency.
Description
Technical field
The utility model is related to boiler technology field more particularly to a kind of steam generators of Novel structure.
Background technology
Steam generator is the mechanical equipment for water being heated as using the thermal energy of fuel or other energy steam.Steam is sent out
Raw device application field is extensive, is widely used in clothing factory, drycleaner's, restaurant, steamed bun shop, dining room, dining room, factories and miness, Bean Products Factory etc.
Place.
Current steam generator mostly uses combustion gas or fuel Heating, and the efficiency of heating surface is low, and the electricity used at present
Hot steam generator is to be arranged to the bottom of storage tank using electrothermal tube mostly, directly heats and generate to the water in water tank
Steam.There is heating slowly, the low problem of the thermal efficiency in this electric heating steam generator.
As Chinese patent literature CN2071061U discloses a kind of steam generating appliances for the effects that being used for beauty, health care, packet
It includes metal electrode board and the shell made of heat resistant plastice, go out vapour cover board, interior panelling, flexible handle, metal electrode board is necessary
Power on through power cord, there are internal baffles in shell, it is suitable for reading to have vapour cover board, there is socket slot that can be inserted with band outside shell bottom
The flexible handle of mouth is connected.For another example a kind of improved electric-heating steam generation disclosed in Chinese patent literature CN2651594Y
Device, for generating steam, including body cavity and electric heater, electric heater are placed in body cavity, are equipped in body cavity
Partition board separates cavity above and below, and upper cavity is vapor cavity, and lower chamber is heating water cavity, and partition board is equipped with steaming hole；Partition board
There are 2-6 layers, forms transition chamber between partition board, the steaming hole dislocation arrangement on adjacent partition board.Electric heater will heat in water cavity
Water heats, and steam is entered spare in vapor cavity by the transition chamber of partition board and its formation.Disclosed in above-mentioned two patent document
Electric heating steam generator, belong to such product.
Steam generator is more demanding to the heat insulation of shell, common material be used as steam generator wall every
Thermal effect is poor, and in order to reach preferable heat insulation, the heat-barrier material thickness used is larger so that steam generator consumable quantity is too
Greatly, construction cost is virtually increased.So particularly important as steam generator heat-preserving wall using light-duty material.
Vacuum heat-insulating plate (VIP plates), is one kind in vacuum thermal insulating material, is answered by filling core material and vacuum protection surface layer
It closes, it is effectively prevented from heat transmission caused by cross-ventilation, therefore thermal coefficient can be greatly lowered, and is less than 0.003w/
Mk, and without containing any ODS materials, there is environmental protection and energy-efficient characteristic, it is state-of-the-art efficient in the world at present
Thermal insulation material.And also has at present and vacuum heat-insulating plate is applied to water tank heat preserving, such as CN202339023A by vacuum heat-insulating plate
It is kept the temperature applied to solar water container, CN104180534A is applied to water heater heat preservation.
But the cost requirement of vacuum heat-insulating plate is very high, and because of thickness difference, thermal coefficient difference and use
The cost requirement of vacuum heat-insulating plate caused by the reasons such as vacuum heat-insulating plate quantity is not also high.Vacuum insulation plate thickness is bigger, heat preservation
Effect is better, but cost increase is also very much, and thermal coefficient more minimum living temp effect is better, but cost is higher, vacuum heat-insulating plate
Distributed quantity is more, and heat insulation effect is better, but cost is also high.Therefore the utility model provides a kind of new steam generation
Device while completing heat insulation effect to reach, has the function that save cost.
Utility model content
It is exhausted by vacuum the purpose of this utility model is to provide a kind of steam generator of vacuum heat-insulating plate thickness change
Hot plate thickness change reaches saving cost, improves heat insulation effect.
To achieve the above object, the utility model adopts the following technical solution：
A kind of steam generator, the steam generator include babinet, electric heating tube, cold water inlet and steam (vapor) outlet, institute
It includes vertical portion and horizontal component to state babinet, and the vertical portion includes inner and outer wall, is set between the inner and outer wall
Vacuum heat-insulating plate is set, thermal insulation material is filled in space between vacuum heat-insulating plate, inner and outer wall, which is characterized in that the vacuum is exhausted
The thickness of hot plate is different, and along the short transverse of vertical portion, the thickness of vacuum heat-insulating plate constantly increases.
Preferably, along the short transverse of vertical portion, the ever-increasing amplitude of vacuum insulation plate thickness constantly increases
Add.
Preferably, the thickness of the vacuum heat-insulating plate of topmost is 1.2-1.4 times of the vacuum insulation plate thickness of lowest part.
Preferably, the thermal insulation material is polyurethane.
Preferably, the cold water inlet is arranged on the side wall of babinet, exhaust outlet is arranged in the babinet top, described
Electric heating tube is arranged in babinet, and the electric heating tube includes outer tube and the electric heater that is arranged in outer tube, the electrical heating
Pipe is that vertical direction is arranged, and intake tunnel is arranged in the electric heating tube lower part, ensure the water of babinet can enter electric heating tube into
The top of row heating, electric heating tube connects steam (vapor) outlet.
Preferably, the outer diameter of steam (vapor) outlet pipeline is less than the outer diameter of the outer tube of electric heating tube.
Preferably, the cross section of the babinet is rectangular, the cross section of the electric heating tube is round.
Preferably, the electric heating tube is arranged in the centre position of babinet.
Preferably, the outer diameter of the outer tube of the electric heating tube is 0.3-0.45 times of the internal diameter of babinet.
Preferably, intake tunnel is strip slot.
Preferably, the intake tunnel is arranged the 50% or less of babinet water level.
Preferably, the centrally disposed center electrically heated rod axially of the electric heating tube and along center
Electrically heated rod is arranged more from radial electrically heated rod to the more root diameters radially extended to electrically heated rod on the radial direction electrically heated rod
Outwardly extending triangle cooling fin.
Preferably, the triangle cooling fin is right angled triangle cooling fin, the short side for forming right angle is located at radial direction
On bar, long side extends outwardly from radial bars；Multiple triangle cooling fins are set on each radial direction electrically heated rod, described multiple three
Angle radiator piece is similar figures；
The acute angle that the short side at the right angle is opposite is M, and the length of side of the long side at right angle is L, phase on same radial direction electrically heated rod
The adjacent distance of adjacent triangle cooling fin is S, then meets following require：
tan(M)=a*tan(S/L)3-b*(S/L)2+ c* (S/L)-d, wherein tan is trigonometric function, and a, b, c, d are ginsengs
Number；
61.0<a<61.5,
60.0<b<60.5,
21<c<22,
2.2<d<2.3,4<M<35 °, preferably 8<M<25°
0.18< S/L <0.38。
The utility model has the following advantages that：
1）The vacuum insulation plate thickness of the utility model steam generator changes along short transverse, by thickness change come
Reach saving cost, heat insulation effect is turned up.
2）The utility model coordinates polyurethane as library plate thermal insulation material by using vacuum heat-insulating plate, substantially increases case
The heat-insulating property of body, the more energy conservation and environmental protection compared with conventional steam generator.
3）The utility model devises a kind of steam generator of Novel structure, by such structure, can pass through one
Device, which can be realized, quickly provides steam, and the steam generator has heating rapid, uniformity of temperature profile, safe and reliable
Function improves the efficiency of heating surface.
4）The utility model by be arranged the trepanning of electric heating tube bottom along in short transverse distribution density, area with
And the setting of the spacing variation of multiple rows of trepanning, the efficiency of heating surface is further improved, the security performance of steam generator is improved.
5) the utility model devises new-type vertical tubular electric heating tube, and electric heating tube top is directly connected to steam and goes out
Mouthful, by such mechanism, it can further improve the efficiency of heating surface.
6）The utility model devises variation of the electrical heating efficiency along short transverse, can further increase the peace of device
Full performance and heating properties.
7）The utility model devises the electric heating tube of new-type interior heat radiating fin structure, passes through the three of Novel structure electric heating tube
Angle radiator piece increases the disturbance of heating surface (area) (HS and fluid, improves heating effect.
8）The utility model passes through numerical simulation and many experiments, it is determined that the optimal relationship of interior cooling fin, further
Heating effect is improved, is also related to providing a best reference frame for the electric heating tube of such structure.
Description of the drawings：
Fig. 1 is the structural schematic diagram of the steam generator casing of the utility model；
Fig. 2 is the utility model steam generator casing vertical portion thickness change preferred embodiment schematic diagram；
Fig. 3 is that the utility model steam generator casing vertical portion spacing changes preferred embodiment schematic diagram；
Fig. 4 is the steam generator preferred structure schematic diagram that the utility model generates hot water and steam.
Fig. 5 is the steam generator preferred structure schematic diagram for only generating steam of the utility model.
Fig. 6 is electric heating tube Structure of cross section schematic diagram.
Fig. 7 is heat sink sizes schematic diagram in electric heating tube.
Fig. 8 is electric heating tube longitudinal direction section schematic diagram.
In figure：1- babinets；2- electric heating tubes；3- cold water inlets；4- hot water outlets；5- steam (vapor) outlets；6- exhaust outlets；
11- vacuum heat-insulating plates；12- hard polyurethane foams；
21- outer tubes；22- radial direction electrically heated rods；23- triangle cooling fins；The centers 24- electrically heated rod；25- trepannings
41- vertical portions, 42- horizontal components, 411- inner walls, 412- outer walls.
Specific implementation mode
Fig. 1-8 illustrates a kind of steam generator.As shown in figure 4, the steam generator includes babinet 1, electric heating tube
2, cold water inlet 3, hot water outlet 4 and steam (vapor) outlet 5.
Babinet 1 includes vertical portion 41 and horizontal component 42, as shown in Figure 1, the vertical portion 41 includes 411 He of inner wall
Vacuum heat-insulating plate 11, vacuum heat-insulating plate 11, inner wall 411 and outer wall is arranged in outer wall 412 between the inner wall 411 and outer wall 412
Thermal insulation material is filled in space between 412.
As first preferred embodiment, as shown in Fig. 2, the thickness of the vacuum heat-insulating plate 11 is different, along vertical
The short transverse of part 41（I.e. from the bottom up）, the thickness of vacuum heat-insulating plate 11 constantly increases.Pass through thickness difference so that edge
It in short transverse, total heat transfer coefficient of babinet is lower and lower, so that cabinet insulation effect is become better and better.
Because in a vapor generator, because the hot water that density reasons make temperature high is walked upwards, the low cold water of temperature to
Under walk, therefore the coolant-temperature gage of steam generator lower part will be less than steam generator top water temperature.Steam is caused to be sent out in this way
The internal-external temperature difference of raw device lower part is less than the temperature difference on steam generator top.The utility model is directed to this case, passes through setting
Vacuum heat-insulating plate is different in the thickness of different height, so that the heat insulation effect of different location taken is different.It is set on top
Thick heat-insulating shield is set, the heat insulation effect on top is targetedly increased.Pass through such setting so that realizing essentially identical heat preservation
In the case of, 15% or more cost can be saved.Meanwhile in the case where spending identical cost, 13% or more can be improved
Heat insulation effect.
Further preferably, along the short transverse of vertical portion 41, the ever-increasing amplitude of 11 thickness of vacuum heat-insulating plate is not
Disconnected increase.
It is found by numerical simulation and experiment, the setting changed by amplitude can meet temperature change well
The regularity of distribution, to further reach the technique effect for reducing cost and improving heat preservation.
Further preferably, the thickness of the vacuum heat-insulating plate of topmost is the 1.2-1.4 of the vacuum insulation plate thickness of lowest part
Times.
Further preferably, the thickness of the vacuum heat-insulating plate of topmost is 1.3 times of the vacuum insulation plate thickness of lowest part.
By the setting of above-mentioned preferred heat preservation plate thickness, it is capable of the optimum efficiency of cost of implementation saving.
Preferably, the material identical of different vacuum heat-insulating plates.
Preferably, the thermal coefficient of different vacuum heat-insulating plates is identical.
Preferably, along short transverse, the spacing between adjacent vacuum heat-insulating plate is identical.
As second preferred embodiment, preferably, the thermal coefficient of the vacuum heat-insulating plate 11 is different, along perpendicular
The short transverse of straight part 41（I.e. from the bottom up）, the thermal coefficient of vacuum heat-insulating plate 11 constantly reduces.Pass through thermal coefficient
It is different so that along in short transverse, total heat transfer coefficient of babinet is lower and lower, so that cabinet insulation effect is increasingly
It is good.
Because in a vapor generator, because the water that density reasons make temperature high is walked upwards, the low water of temperature is walked downwards,
Therefore the temperature of the water of steam generator lower part will be less than the temperature of the water on steam generator top.Lead to steam generator in this way
The internal-external temperature difference of lower part is less than the temperature difference on steam generator top.The utility model is directed to this case, by the way that vacuum is arranged
Heat-insulating shield is different in the thermal coefficient of different height, so that the heat insulation effect of different location taken is different.It is set on top
The low heat-insulating shield of thermal coefficient is set, the heat insulation effect on top is targetedly increased.Pass through such setting so that basic realizing
In the case of identical heat preservation, 15% or more cost can be saved.Meanwhile it in the case where spending identical cost, can improve
13% or more heat insulation effect.
Further preferably, the width constantly reduced along the short transverse of vertical portion 41,11 thermal coefficient of vacuum heat-insulating plate
Degree is continuous to be increased.
It is found by numerical simulation and experiment, the setting changed by amplitude can meet temperature change well
The regularity of distribution, to further reach the technique effect for reducing cost and improving heat preservation.
Further preferably, the thermal coefficient of the vacuum heat-insulating plate of lowest part is the heat conductivity of vacuum insulation panel of topmost
1.18-1.39 again.
Further preferably, the thickness of the vacuum heat-insulating plate of lowest part is 1.29 times of the vacuum insulation plate thickness of topmost.
By the setting of above-mentioned preferred thermal insulation board thermal coefficient, it is capable of the optimum efficiency of cost of implementation saving.
Preferably, the thickness of different vacuum heat-insulating plates is identical.
Preferably, along short transverse, the spacing between adjacent vacuum heat-insulating plate is identical.
As third preferred embodiment, as shown in figure 3, preferably, between adjacent vacuum heat-insulating plate 11
Spacing is different, along the short transverse of vertical portion 41（I.e. from the bottom up）, the spacing between adjacent vacuum heat-insulating plate 11
Constantly become smaller.It is different to pass through spacing so that along in short transverse, vacuum heat-insulating plate distribution is closer and closer, babinet it is total
Heat transfer coefficient come it is lower so that cabinet insulation effect is become better and better.
Because in a vapor generator, because the water that density reasons make temperature high is walked upwards, the low water of temperature is walked downwards,
Therefore the temperature of the water of steam generator lower part will be less than the temperature of the water on steam generator top.Lead to steam generator in this way
The internal-external temperature difference of lower part is less than the temperature difference on steam generator top.The utility model is directed to this case, by the way that vacuum is arranged
Heat-insulating shield is different in the adjacent spacing of different height, so that the heat insulation effect of different location taken is different.On top
The adiabatic plate spacing of setting is small, targetedly increases the heat insulation effect of lower part.Pass through such setting so that essentially identical realizing
In the case of heat preservation, 13% or more cost can be saved.Meanwhile in the case where spending identical cost, can improve 12% with
On heat insulation effect.
Further preferably, along the short transverse of vertical portion 41, the ever-reduced amplitude of 11 spacing of vacuum heat-insulating plate is not
Disconnected increase.
It is found by numerical simulation and experiment, the setting changed by amplitude can meet temperature change well
The regularity of distribution, to further reach the technique effect for reducing cost and improving heat preservation.
Further preferably, the spacing of the vacuum heat-insulating plate of topmost is the 0.85- of the vacuum insulation plate spacing of lowest part
0.92 times.
Further preferably, the spacing of the vacuum heat-insulating plate of topmost is 0.88 times of the vacuum insulation plate spacing of lowest part.
By the setting of above-mentioned preferred heat preservation plate spacing, it is capable of the optimum efficiency of cost of implementation saving.
Preferably, the thickness of different vacuum heat-insulating plates is identical.
Preferably, the thermal coefficient of different vacuum heat-insulating plates is identical.
Preferably, three above-mentioned embodiments can be combined.
As shown in figure 4, the cold water inlet 3 is arranged in the lower part of babinet 1, the hot water goes out 4 mouthfuls and is located at the upper of 1 body of case
Portion.The electric heating tube 2 is arranged in babinet, and the electric heating tube 2 is arranged for vertical direction（It is set perpendicular to water tank bottom plane
It sets）, electric heating tube 2 includes outer tube 21 and the electric heater that is arranged in outer tube 21, and the setting water inlet of 2 lower part of the electric heating tube is logical
Road ensures that the water of babinet 1 can be heated into electric heating tube 2, and the top of electric heating tube 2 connects steam (vapor) outlet 5.
Preferably, the outer tube of 5 pipeline of steam (vapor) outlet and electric heating tube 2 is to be tightly connected.
Preferably, the outer diameter of 5 pipeline of steam (vapor) outlet is less than the outer diameter of the outer tube of electric heating tube 2.It can ensure to steam in this way
The vapour velocity of discharge.
Cold water enters babinet by cold water inlet 3.When being worked, electric heating tube 2 is arranged in babinet 1, in babinet 1
Water enters electric heating tube 2 by the trepanning 25 on outer tube 21, is then heated in electric heating tube 2, the steaming generated after heating
Vapour is discharged by steam (vapor) outlet 5.Meanwhile electric heating tube is while generating steam, while the water in heating compartment, it is produced after heating
Raw hot water can be utilized by hot water outlet.
By above-mentioned structure setting, steam and hot water can be generated simultaneously so that function that there are many steam generating appliances,
Its range utilized is expanded, and the steam generated is directly discharged by the steam (vapor) outlet being connect with electric heating tube, because being
Heat the water outside electric heating tube by outer tube 21, thus external water will not explosive evaporation, also ensure the safety of heating
Property.
The utility model is arranged by electric heating tube 2 for vertical direction, can to heat water in the vertical direction so that
Water continuous heating in uphill process, the electric heating tube being arranged relative to horizontal direction, further improves the efficiency of heating surface.
It is improved as one, hot water outlet 4 can be removed, such as shown in figure 5, only using steam generator as one
Generate the simple function evaporator of steam.
Preferably, exhaust outlet 6 is arranged in 1 top of babinet.By the way that exhaust outlet 6 is arranged, 1 internal pressure of babinet is avoided
It is excessive, it is ensured that safety.
Preferably, the cross section of the babinet is rectangular, preferred cube.
Preferably, the cross section of the electric heating tube 2 is round.
Preferably, the electric heating tube 2 is arranged in the centre position of babinet.By so set, ensureing hot water heating
Uniformity.
Preferably, the outer diameter of the outer tube 21 of the electric heating tube 2 is 0.3-0.45 times of the internal diameter of babinet 1.Further
Preferably 0.35-0.40 times.
Preferably, intake tunnel is strip slot.
Preferably, intake tunnel is trepanning 25.As shown in Figure 8.It should be noted that be only schematic diagram in Fig. 8, though
1 or a rows of openings 25 for only showing setting in right Fig. 8 between adjacent electrically heated rod 22, actually not only limit to
In one either a row can be arranged on the upper and lower position between adjacent electrically heated rod 22 it is multiple or multiple rows of.
Preferably, 25 shape of the trepanning can be round or rectangular.
Preferably, the trepanning 25 is arranged the 50% or less of 1 water level of babinet.By so set, can ensure water energy
It is enough to be timely internally heated into electric heating tube 2, while also avoiding trepanning 25 from being arranged excessively high causes steam excessive from trepanning 25
Go out, avoid pressure in entire babinet excessive, while the water of eminence also being avoided to enter in electric heating tube, the steam generated is caused to take
The moisture of band is too many.
Preferably, along short transverse（That is direction from the bottom up, appear below along short transverse, if do not had
Specified otherwise all refers to direction from the bottom up）, the trepanning 25 is set as multiple rows of.
It is multiple rows of by being arranged, it is ensured that different height and position water inlets avoids an independent position from intaking, causes to heat
It is uneven, while the water avoided enter into is evaporated, and causes to dry up in heating tube.
Preferably, along short transverse, the distribution density of the trepanning 25 is smaller and smaller.The density that trepanning 25 is distributed is got over
It is next smaller, that is, mean the fewer and fewer of trepanning distribution, the area of trepanning is also just smaller and smaller.
By a large amount of numerical simulation and its experimental studies have found that, by be arranged trepanning distribution density it is smaller and smaller, mainly
The reason is that ensureing that most of water is heated in lower part, constantly there is water to enter electric heating tube 2 in water becomes steam uphill process, hold
Continuous heating.If lower part water inlet is few, lower part water fast vaporizing may be caused, causes in electric heating tube 2 that pressure is excessive, is caused
The water in portion is also because pressure considerations cannot be introduced into electric heating tube.Reduce the dry of electric heating tube, while improving the efficiency of heating surface.
Further preferably, along short transverse, the amplitude that the distribution density of the trepanning 25 is smaller and smaller constantly increases.
By largely testing and numerical simulation can be further increased by the variation of above-mentioned trepanning distribution density
The efficiency of heating surface improves the output efficiency of steam, while can reduce dry in electric heating tube.
Preferably, along short transverse, the area of single trepanning 25 is smaller and smaller.Further preferably, along height side
To the amplitude that the area of single trepanning 25 is smaller and smaller constantly increases.Specific reason referring to 25 distribution density of trepanning variation.
Preferably, along short transverse, it is described smaller and smaller per the sum of the area of rows of openings 25.Preferably, along
Short transverse, it is described to be continuously increased per the smaller and smaller amplitude of the sum of the area of rows of openings 25.Specific reason is divided referring to trepanning 25
The variation of cloth density.
Preferably, along short transverse, it is described increasing per the spacing between rows of openings 25.Preferably, along
Short transverse, the amplitude increasing per the spacing between rows of openings 25 are continuously increased.Specific reason is divided referring to trepanning 25
The variation of cloth density.
Preferably, the centrally disposed center electrically heated rod 24 axially of electric heating tube 2.
Preferably, along short transverse, the heating power of the unit length of electrically heated rod 24 is constantly reduced.By setting
The heating power for setting electrically heated rod 24 is constantly reduced, and ensures that the fluid of lower part quickly heats, then hot fluid passes through naturally right
Top is flowed to, the fluid outside the fluid on top and the electric heating tube 2 of its underpart rapidly enters, and can further increase heating
Efficiency.By largely testing and numerical simulation can be further increased by the variation of above-mentioned electric heater for heating power
10% or so the efficiency of heating surface saves heating time.
Preferably, along short transverse, the amplitude of the continuous reduction of heating power of the unit length of electrically heated rod 24
It is continuous to increase.
By largely testing and numerical simulation can by the variation of above-mentioned 24 heating power amplitude of electrically heated rod
5% efficiency of heating surface is further increased, further saves heating time.
Preferably, electrically heated rod 24 divides for multistage, along short transverse, the heating power of the unit length of different sections is not
Together.Wherein along short transverse, the heating power of the unit length of different sections constantly reduces.Further preferably, reduction
Amplitude constantly increases.
Preferably, every section of length is identical.
Preferably, the heating power of every section of unit length is identical.
Specific reason is as above.
It is segmented by being arranged, it can be with further such that being simple to manufacture conveniently.
The electric heating tube 2 is along center electrically heated rod 24 to the more root diameters radially extended to electrically heated rod 22, the diameter
More are arranged on electrically heated rod 22 from 22 outwardly extending triangle cooling fin 23 of radial electrically heated rod.
The utility model is by being arranged radial electrically heated rod 22 and along 22 outwardly extending triangle of radial electrically heated rod
Shape cooling fin 23 can further increase the efficiency of heating surface, while increase heating surface (area) (HS, improve heating effect, and because setting
Triangle cooling fin passes through the triangular tip of the similar acicular texture of triangle cooling fin so that the vapor bubbles of generation exist
In uphill process, flow-disturbing can be further increased, cuts bubble so that air pocket turns to smaller bubble, further promotes vapour
The fusion of liquid, the heat exchange for promoting vapour-liquid make fluid be sufficiently mixed, improve heating effect.
Further preferably, radial electrically heated rod cross section is rectangle, is preferably square.
Further preferably, radial electrically heated rod cross section is circle.
Preferably, 0.3-0.5 times of electrically heated rod centered on the heating power of radial electrically heated rod in unit length,
Preferably 0.4 times.
Preferably, the radial electrically heated rod 22 is shaft, electrical heating is extended to from the center of circle along radial
The inner wall of pipe 21.
Preferably, multiple triangle cooling fins 23, multiple triangles are arranged on 22 on each radial direction electrically heated rod
Shape cooling fin 23 is similar figures.Three interior angles in correspondence with each other of i.e. different triangle cooling fins are identical.
Preferably, from the center of electric heating tube 21 to the inside pipe wall of electric heating tube 21, the length of side of triangle cooling fin 23
Or area is smaller and smaller.
Preferably, 22 both sides distribution triangle cooling fin 23 of radial electrically heated rod, triangle cooling fin 23 is along radial direction
The center line of electrically heated rod 22 is symmetrical.
Preferably, adjacent the distance between the triangle cooling fin 23 of radial electrically heated rod 22 remains unchanged.
Preferably, from the center of electric heating tube 21 to radial direction, adjacent 22 triangle of radial electrically heated rod radiates
Spacing between piece 23 constantly increases.
Constantly increased by the spacing between adjacent 22 triangle cooling fin 23 of radial electrically heated rod, can be made outer
Fluid amount of flow big local fluid circulation space in portion's is big, can further decrease flow resistance, heating effect is kept not substantially
Become.
Preferably, the triangle cooling fin 23 is right angled triangle cooling fin, the short side for forming right angle is located at diameter
To on electrically heated rod, long side extends outwardly from radial electrically heated rod.
Preferably, the radial direction electrically heated rod 22 is round bar, a diameter of 0.6-1.2mm, preferably 0.8mm.
Preferably, triangle cooling fin extends outwardly from the central plane of round bar.The triangle cooling fin is tablet
Structure.The slab construction is perpendicular to center electrically heated rod 24, and slab construction extended surface passes through the center line of round bar.
It is learnt by numerical analysis and experiment, adjacent triangle cooling fin spacing cannot be too big, then can greatly very much
Cause cooling fin heat transfer area too small, augmentation of heat transfer effect is bad, but spacing can not be too small, and spacing is too small, causes in pipe
Fluid circulation space is too small, causes the resistance that steam flows in pipe 2 too big, similarly, the apex angle of triangle cooling fin cannot be too
Greatly, flow resistance can be also influenced very much greatly, and flow-disturbing effect can be caused bad greatly very much, but can not be too small, too
Heating surface (area) (HS is too small if small, can also influence heating effect.Therefore the utility model is from two side of heating effect and flow resistance
Face accounts for, therefore the utility model is through a large number of experiments, preferentially meeting normal flow resistance（Always pressure-bearing is
8Mpa or less）In the case of so that being optimal of heating effect has arranged the best relationship of parameters.
The acute angle that the short side at the right angle is opposite is M, and the length of side of the long side at right angle is L, on same radial direction electrically heated rod 22
The adjacent distance of adjacent triangle cooling fin is S, then meets following require：
tan(M)=a*tan(S/L)3-b*(S/L)2+ c* (S/L)-d, wherein tan is trigonometric function, and a, b, c, d are ginsengs
Number；
61.0<a<61.5, preferably a=61.295,
60.0<b<60.5, preferably b=60.267,
21<c<22, preferably c=21.412,
2.2<d<2.3, preferably d=2.2734
4<M<35 °, preferably 8<M<25°
0.18< S/L <0.38,0.25R<L<0.32 R。
R is the distance at the midpoint on the side at the place for being located at axial cooling fin 22 from 2 center of circle of electric heating tube to right angled triangle.
Wherein adjacent distance S be the place for being located at axial cooling fin 22 with adjacent triangle cooling fin side between
Away from；I.e. triangle cooling fin be located at the place of axial cooling fin 22 side rear end and rear triangular be located at axial cooling fin 22
The distance between the side front end at place.Referring specifically to the mark of Fig. 7.
Preferably, radial electrically heated rod 22 is set as 7-9 roots, the angle formed between adjacent radial electrically heated rod 22
It is equal.Further preferably 8.
The length of side L of the long side at right angle chooses being averaged for the length of side of the long side at two right angles of adjacent triangle cooling fin
Value.
Further preferably, the internal diameter of electric heating tube is 25-40mm.
Preferably, electric heating tube is straight tube.
Preferably, the heating power of steam generator is 2000-4000W, preferably 2500-3500W.
Preferably, electrically heated rod 24,22 is resistance heater, it is long to change unit by the diameter that resistance is arranged
The variation of the heating power of degree.
Preferably, along short transverse, the distance between neighbouring radial electrically heated rod 22 is increasing.Into one
Step is preferred, and along short transverse, the increasing amplitude of the distance between adjacent radial electrically heated rod 22 constantly increases.
Preferably, along short transverse, the heating power of the unit length of different radial electrically heated rods 22 is increasingly
It is small.Further preferably, the smaller and smaller amplitude of different 22 unit length heating powers of radial electrically heated rod constantly increases.
By be arranged electrically heated rod 22 heating power in the height direction constantly reduce or the distance between it is more next
It is bigger, ensure that the fluid of lower part quickly heats, then hot fluid has arrived top, the fluid on top and its underpart by free convection
Electric heating tube 2 outside fluid rapidly enter, the efficiency of heating surface can be further increased.By largely testing and Numerical-Mode
It is quasi-, by the variation of above-mentioned electric heater for heating power, the 8-10% efficiencies of heating surface can be further increased, when saving heating
Between.
Although the utility model has been disclosed in the preferred embodiments as above, the utility model is not limited to this.Any
Field technology personnel can make various changes or modifications, therefore this practicality without departing from the spirit and scope of the utility model
Novel protection domain should be subject to claim limited range.
Claims (8)
1. a kind of steam generator of vacuum heat-insulating plate thickness change, the steam generator include babinet, electric heating tube, cold water
Entrance and steam (vapor) outlet, the babinet include vertical portion and horizontal component, and the vertical portion includes inner and outer wall, described
Vacuum heat-insulating plate is set between inner and outer wall, and thermal insulation material, feature are filled in space between vacuum heat-insulating plate, inner and outer wall
It is, the thickness of the vacuum heat-insulating plate is different, and along the short transverse of vertical portion, the thickness of vacuum heat-insulating plate constantly increases
Add；The cold water inlet is arranged on the side wall of babinet, and exhaust outlet is arranged in the babinet top, and the electric heating tube setting exists
In babinet, the electric heating tube includes outer tube and the electric heater that is arranged in outer tube, and the electric heating tube sets for vertical direction
It sets, intake tunnel is arranged in the electric heating tube lower part, ensures that the water of babinet can be heated into electric heating tube, electric heating tube
Top connect steam (vapor) outlet；Intake tunnel is trepanning, and from the bottom up along short transverse, the distribution density of the trepanning is more next
It is smaller.
2. steam generator as described in claim 1, which is characterized in that along the short transverse of vertical portion, vacuum insulation
The ever-increasing amplitude of plate thickness constantly increases.
3. steam generator as described in claim 1, which is characterized in that the thickness of the vacuum heat-insulating plate of topmost is lowest part
1.2-1.4 times of vacuum insulation plate thickness.
4. steam generator as described in claim 1, which is characterized in that the thermal insulation material is polyurethane.
5. steam generator as described in claim 1, which is characterized in that the outer diameter of steam (vapor) outlet pipeline is less than electric heating tube
The outer diameter of outer tube.
6. steam generator as described in claim 1, which is characterized in that the cross section of the babinet is rectangular, the electricity
The cross section of heating tube is round.
7. steam generator as described in claim 1, which is characterized in that the centrally disposed axially side of the electric heating tube
To center electrically heated rod and along center electrically heated rod to the more root diameters radially extended to electrically heated rod, the radial electricity plus
More are arranged on hot pin from the outwardly extending triangle cooling fin of radial electrically heated rod.
8. steam generator as claimed in claim 7, which is characterized in that the triangle cooling fin is that right angled triangle dissipates
Backing, the short side for forming right angle are located in radial bars, and long side extends outwardly from radial bars；Setting is more on each radial direction electrically heated rod
A triangle cooling fin, multiple triangle cooling fins are similar figures；
The acute angle that the short side at the right angle is opposite is M, and the length of side of the long side at right angle is L, adjacent on same radial direction electrically heated rod
The adjacent distance of triangle cooling fin is S, then meets following require：
Tan (M)=a*tan (S/L)3-b*(S/L)2+ c* (S/L)-d, wherein tan is trigonometric function, and a, b, c, d are parameters；
61.0<a<61.5,
60.0<b<60.5,
21<c<22,
2.2<d<2.3,4<M<35 °,
0.18<S/L<0.38。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721177575.6U CN207674409U (en) | 2017-09-14 | 2017-09-14 | A kind of steam generator of vacuum heat-insulating plate thickness change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721177575.6U CN207674409U (en) | 2017-09-14 | 2017-09-14 | A kind of steam generator of vacuum heat-insulating plate thickness change |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207674409U true CN207674409U (en) | 2018-07-31 |
Family
ID=62953177
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721177575.6U Expired - Fee Related CN207674409U (en) | 2017-09-14 | 2017-09-14 | A kind of steam generator of vacuum heat-insulating plate thickness change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207674409U (en) |
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2017
- 2017-09-14 CN CN201721177575.6U patent/CN207674409U/en not_active Expired - Fee Related
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Granted publication date: 20180731 Termination date: 20190914 |