CN114459153B - Electric preheating heat accumulating type heater - Google Patents
Electric preheating heat accumulating type heater Download PDFInfo
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- CN114459153B CN114459153B CN202210044493.3A CN202210044493A CN114459153B CN 114459153 B CN114459153 B CN 114459153B CN 202210044493 A CN202210044493 A CN 202210044493A CN 114459153 B CN114459153 B CN 114459153B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- 238000005338 heat storage Methods 0.000 claims abstract description 38
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims abstract description 8
- 230000001172 regenerating effect Effects 0.000 claims description 40
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 18
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 17
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000429 assembly Methods 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/002—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release using electrical energy supply
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Heating Systems (AREA)
Abstract
The invention discloses an electric preheating heat accumulating type heater, which comprises an outer cylinder, a plurality of heat insulating inner cylinders and a heat accumulating sheet assembly, wherein the heat accumulating sheet assembly is arranged on the outer cylinder; the heat insulation inner cylinder body is coaxially arranged in the outer cylinder body; the heat storage plate assembly is arranged between two adjacent heat insulation inner cylinder bodies, two channels are symmetrically arranged along the length direction, heating parts are arranged in the channels, two ends of the heat storage plate assembly are respectively connected with two support cylinders, and the two support cylinders are respectively matched and connected with the positioning parts; the heating part is vertical to the ground, one side positioning piece supports the heat storage plate assembly, and a gap exists on the other side positioning piece in the vertical direction; the heating portion is parallel with the ground, and the locating piece supports the heat accumulation piece subassembly in vertical direction, and two support barrels have the gap in horizontal direction and vertically upwards with the locating piece between for provide the thermal expansion space. The electric preheating heat accumulating type heater provided by the invention provides bearing positioning for the heat accumulating plate assembly so as to ensure the convenience of vertical assembly, avoids the influence of heat deformation during horizontal use, ensures the stress stability of the heat accumulating plate assembly, and is convenient to install and maintain.
Description
Technical Field
The invention relates to the technical field of high-temperature heaters, in particular to an electric preheating heat accumulating type heater.
Background
The conventional hypersonic wind tunnel needs to heat air in advance by using a heater to prevent air from condensing, and at present, the common heater is divided into a resistance continuous heater and a heat accumulating type heater, wherein the resistance continuous heater has high cost, and the required power is larger, so that larger impact is caused on a local power grid; the electric preheating regenerative heater stores heat energy into the heat storage element in advance through electric heating or combustion heating, air flows are subjected to heat exchange through the heat storage element and reach the required temperature, but a wind tunnel matched with the electric preheating regenerative heater has the problems of long preheating time and short running time, and the combustion heating mode usually adopts aviation kerosene combustion for preheating, so that dangerous source management exists, the problem of carbon deposition on the surface of the heat storage element is caused by insufficient combustion, heat storage efficiency is further influenced, carbon deposition particles are easily doped when air flows through the heat storage element, air density is influenced, and test data are further deviated; both common heaters have significant drawbacks in use.
The wind tunnel in the present stage is reformed to ensure the consistency of the components of the test gas and the air, the preheating time is reduced by adopting a resistance preheating metal sheet to electrically preheat the heat accumulating heater on the premise of not increasing the size of the heater, the number of heating elements is increased, the structural design problems of arrangement, thermal deformation coordination and the like of a plurality of heating elements are necessarily brought about by increasing the number of the heating elements, and in the actual assembly or maintenance process, the heater is generally installed in a horizontal type, so that the friction force between a heat accumulating sheet and an insulating inner cylinder body is required to be overcome in the assembly or disassembly process of the heater, the heat accumulating sheet is pressed on the insulating inner cylinder by self weight, great inconvenience is brought to the installation and maintenance, and the problems of local deformation or local overheating of the inner cylinder body are also brought about.
Therefore, an electric preheating regenerative heater capable of being assembled vertically and used horizontally is needed to be studied urgently.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the electric preheating heat accumulating type heater, and solves the problems of difficult installation, time and labor consumption in maintenance when the electric preheating heat accumulating type heater is installed horizontally in the prior art.
The invention provides an electric preheating heat accumulating type heater, which comprises the following components:
an outer cylinder;
at least two heat-insulating inner cylinders coaxially arranged inside the outer cylinder;
The heat storage plate assembly is arranged between two adjacent heat insulation inner cylinders, two channels are symmetrically formed in the heat storage plate assembly along the length direction, heating parts are arranged in the two channels, two ends of one channel are connected with first supporting cylinders, two ends of the other channel are connected with second supporting cylinders, and each first supporting cylinder and each second supporting cylinder are connected with a positioning piece in a matched mode;
when the heating part is vertical to the ground, the positioning piece on the side close to the ground is used for supporting the heat storage plate assembly, and gaps exist between the first supporting cylinder and the second supporting cylinder on the side far from the ground and the positioning piece in the vertical direction, and the gaps are used for providing a thermal expansion space of the heating part;
when the heating part is parallel to the ground, the locating piece supports the heat accumulation sheet assembly in the vertical direction, gaps exist between the first support cylinder and the second support cylinder in the horizontal direction and the vertical upward direction and between the locating piece, and the gaps are used for providing a thermal expansion space of the heating part.
Optionally, the first support section of thick bamboo with the second support section of thick bamboo is the drum, the hole department symmetry at the both ends of first support section of thick bamboo is equipped with the stopper, two distance between the stopper equals the hole diameter of second support section of thick bamboo.
Optionally, the number of the heat accumulation piece subassembly is two at least, and adjacent two the heat accumulation piece subassembly sets up perpendicularly, and the interval is equal.
Optionally, the heat storage plate assembly further includes a plurality of heat storage plates, a plurality of the heat storage plates are detachably connected, and the channels penetrate through the heat storage plates and are perpendicular to the heat storage plates.
Optionally, the heating portion includes a silicon carbide rod, an insulating ring and a supporting ring, the silicon carbide rod is circumferentially arranged along the length direction of the channel, the supporting rings are axially arranged at two ends of the silicon carbide rod, and each supporting ring is arranged between two adjacent insulating rings.
Further, the heating part further comprises a copper bar protecting cover, wherein the copper bar protecting cover is circumferentially arranged along the silicon carbide rod and is positioned on one side, far away from the locating piece, of the insulating ring on one side, far away from the locating piece.
Optionally, the heat-insulating inner cylinder is prepared by roll welding, and a heat-insulating material is arranged on the surface of the heat-insulating inner cylinder.
Furthermore, two ends of the heat-insulating inner cylinder body are provided with rabbets, and the front ends of the rabbets are conical.
Optionally, the positioning piece includes first drum and second drum that is connected, first drum with form the bearing step between the second drum, the bearing step is used for supporting the heat accumulation piece subassembly.
Optionally, the positioning piece is in clearance fit with the outer cylinder.
According to the electric preheating regenerative heater provided by the invention, the arrangement of the midspan double heating parts is adopted, so that the preheating of the regenerative sheet assembly is more uniform, the vertical assembly of the electric preheating regenerative heater can be realized through the matching connection of the first supporting cylinder and the second supporting cylinder with the positioning parts, the bearing positioning is provided for the regenerative sheet assembly to ensure the convenience of the vertical assembly, and when the electric preheating regenerative heater is used horizontally, the positioning parts support the regenerative sheet assembly, so that each part is prevented from sinking due to the influence of gravity, the centering of the integral structure is influenced, meanwhile, the thermal expansion deformation space is reserved between the positioning parts and the first supporting cylinder and between the positioning parts and the second supporting cylinder, the influence on the operation of the electric preheating regenerative heater and the stability of the integral structure due to the thermal expansion deformation is avoided, and the equipment installation and maintenance are facilitated.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
Fig. 1 is an external view of an electric preheating regenerative heater according to an embodiment of the present invention;
FIG. 2 is a half cross-sectional view of an electric preheating regenerative heater according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an electric preheating regenerative heater according to an embodiment of the present invention;
Fig. 4 is a structural cross-sectional view of an electric preheating storage heater according to an embodiment of the present invention when horizontally installed;
FIG. 5 is a partial cross-sectional view of the bottom of an electric preheating regenerative heater according to an embodiment of the present invention when the electric preheating regenerative heater is vertically installed;
FIG. 6 is a partial block diagram of the top of an electric preheating regenerative heater according to an embodiment of the present invention when the electric preheating regenerative heater is vertically installed;
FIG. 7 is a block diagram of an insulated inner cylinder of an electric preheating regenerative heater according to an embodiment of the present invention;
FIG. 8 is a partial cross-sectional view of an insulated inner barrel of an electric preheating regenerative heater provided by an embodiment of the present invention;
FIG. 9 is a schematic view of a thermal storage plate assembly of an electrically preheated thermal storage heater according to an embodiment of the present invention;
FIG. 10 is a block diagram of a thermal storage plate assembly of an embodiment of the present invention in another view of an electrically preheated thermal storage heater;
Fig. 11 is a structural cross-sectional view of a heating part of an electric preheating regenerative heater according to an embodiment of the present invention;
fig. 12 is a block diagram of a positioning member of an electric preheating regenerative heater according to an embodiment of the present invention.
In the figure:
1-an outer cylinder;
2-heat insulation inner cylinder, 201-shell, 202-assembly welding ring plate, 203-first semicircular connecting pipe, 204-second semicircular connecting pipe and 205-reinforcing rib;
3-heat storage plate components, 301-first supporting cylinders, 3011-limiting blocks, 302-second supporting cylinders and 303-heat storage plates;
The heating part comprises a 4-heating part, a 401-silicon carbide rod, a 402-insulating ring, a 403-supporting ring, a 404-buckle and a 405-copper bar protecting cover;
5-positioning piece, 501-first cylinder, 502-second cylinder.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention provides an electric preheating heat accumulating type heater, which is shown in fig. 1 to 6, and comprises an outer cylinder 1, at least two heat insulating inner cylinders 2 and a heat accumulating plate assembly 3; at least two heat-insulating inner cylinder bodies 2 are coaxially arranged in the outer cylinder body 1; the heat storage plate assembly 3 is arranged between two adjacent heat insulation inner cylinder bodies 2, two channels are symmetrically arranged in the heat storage plate assembly 3 along the length direction, heating parts 4 are arranged in the two channels, two ends of one channel are connected with first supporting cylinders 301, two ends of the other channel are connected with second supporting cylinders 302, and each first supporting cylinder 301 and each second supporting cylinder 302 are connected with a positioning piece 5 in a matched mode; when the heating part 4 is vertical to the ground, the positioning piece 5 on the side close to the ground is used for supporting the heat storage plate assembly 3, and gaps are formed between the first supporting cylinder 301 and the second supporting cylinder 302 on the side far from the ground and the positioning piece 5 in the vertical direction, and the gaps are used for providing a thermal expansion space of the heating part 4; when the heating portion 4 is parallel to the ground, the positioning member 5 supports the thermal storage plate assembly 3 in the vertical direction, and gaps exist between the first support cylinder 301 and the second support cylinder 302 and the positioning member 5 in the horizontal direction and in the vertical upward direction, and the gaps are used for providing a thermal expansion space of the heating portion 4.
According to the electric preheating regenerative heater provided by the invention, the arrangement of the mid-span double heating elements is adopted, so that the preheating of the regenerative sheet assembly 3 is more uniform, the vertical assembly of the electric preheating regenerative heater can be realized through the matching connection of the first supporting cylinder 301 and the second supporting cylinder 302 with the positioning piece 5, the bearing positioning is provided for the regenerative sheet assembly so as to ensure the convenience of the vertical assembly, in addition, when the electric preheating regenerative heater is used horizontally, the positioning piece 5 supports the regenerative sheet assembly 3, so that each part is prevented from sinking due to the influence of gravity, the centering of the integral structure is influenced, meanwhile, the thermal expansion deformation space is reserved between the positioning piece 5 and the first supporting cylinder 301 and the second supporting cylinder 302, the influence of the thermal expansion deformation on the operation of the electric preheating regenerative heater and the stability of the integral structure is avoided, and the equipment installation and maintenance are facilitated.
Specifically, in the above embodiment, referring to fig. 9 and 10, the first supporting cylinder 301 and the second supporting cylinder 302 are cylinders, and the inner holes at two ends of the first supporting cylinder 301 are symmetrically provided with the limiting blocks 3011, and the distance between the two limiting blocks 3011 is equal to the diameter of the inner hole of the second supporting cylinder 302. In this embodiment, the two ends of the channel of each heat accumulating plate assembly 3 are respectively connected with the first supporting cylinder 301 and the second supporting cylinder 302, the first supporting cylinder 301 and the second supporting cylinder 302 are cylinders, the limiting blocks 3011 are symmetrically arranged at the inner holes at the two ends of the first supporting cylinder 301, so that the straight-edge spacing of the first supporting cylinder 301 is identical to the inner diameter of the second supporting cylinder 302, the two limiting blocks 3011 and the first supporting cylinder 301 are integrally processed, when the heating part 4 of the electric preheating heat accumulating type heater is perpendicular to the ground, the heating part 4 can thermally deform along the direction of the long round hole of the first supporting cylinder 301, the radial full constraint of one side of the heat accumulating plate assembly 3 is realized, the other is relatively free, and the other is simultaneously matched and connected with the first supporting cylinder 301 and the second supporting cylinder 302 by utilizing the positioning piece 5, so that the electric preheating heat accumulating type heater can be centered in the electric preheating heat accumulating type heater, the coaxiality is guaranteed, and the heat insulating inner cylinder 2 is prevented from being pressed and deformed, wherein the positioning piece 5 and the first supporting cylinder 301 and the single-side supporting cylinder 302 can be conveniently inserted into the supporting cylinder 1 in a reserved way, and the positioning piece 5 is conveniently inserted into the supporting cylinder 302.
Specifically, in the above-described embodiment, the number of the thermal storage plate assemblies 3 is at least two, and the adjacent two thermal storage plate assemblies 3 are vertically arranged with equal spacing. In this embodiment, at least two heat accumulating plate assemblies 3 are disposed in the electric preheating heat accumulating type heater, all the heat accumulating plate assemblies 3 are disposed at equal intervals along the axial direction, and the airflow channels of the adjacent heat accumulating plate assemblies 3 are disposed in an orthogonal manner, because each heat accumulating plate assembly 3 is provided with two channels in a midspan manner, the channels are circular channels, two heating portions 4 are respectively disposed in the two circular channels, the heating portions 4 of the adjacent heat accumulating plate assemblies 3 are disposed in an orthogonal manner by the vertical arrangement of the adjacent two heat accumulating plate assemblies 3, and the electric preheating heat accumulating type heater adopts the arrangement of midspan double heating elements, so that the preheating of the heat accumulating plate assemblies 3 is more uniform.
Specifically, in the above-described embodiment, the thermal storage plate assembly 3 further includes a plurality of thermal storage plates 303, the plurality of thermal storage plates 303 are detachably connected, and the channels pass through the thermal storage plates 303 and are disposed perpendicularly to the thermal storage plates 303. In this embodiment, the heat storage plate assembly 3 includes a plurality of heat storage plates 303, parallel arrangement just all passes through threaded connection between each heat storage plate 303, and the heat storage plate 303 sets up perpendicularly with the passageway that is used for placing heating portion 4, is convenient for evenly give off the heat of heating portion 4, and a plurality of heat storage plates 303 can also be dismantled and connect the quantity that can increase and decrease heat storage plate 303 according to radiating effect and heat dissipation demand, is convenient for adjust.
Specifically, in the above-described embodiment, referring to fig. 11, the heating portion 4 includes the silicon carbide rod 401, the insulating rings 402, and the supporting rings 403, the silicon carbide rod 401 being circumferentially disposed along the length direction of the channel, the supporting rings 403 being axially disposed at both ends of the silicon carbide rod 401, each supporting ring 403 being disposed between two adjacent insulating rings 402. In this embodiment, the arrangement mode of the insulating ring 402 and the supporting ring 403 ensures that the silicon carbide rod 401 is centered and coaxial in the heat storage plate 303 assembly, the temperature difference at the junction of the heat storage plate 303 assembly where the silicon carbide rod 401 is located is maximum, and the insulating ring 402 and the supporting ring 403 can effectively avoid the hidden danger of integral short circuit caused by uneven brittle failure of the cold and hot of the silicon carbide rod 401, and also solve the problem of mutual insulation between the heat storage plate assembly 3 and the pressure-bearing outer shell 201, specifically, the outer diameter of the insulating ring 402 is set to 64mm, the inner diameter of the supporting ring 403 is set to 68mm, namely, convenience in installation of the positioning piece 5 and the insulating ring 402 is ensured, and a certain thermal expansion space is reserved.
Further, the heating portion 4 further includes a copper bar protecting cover 405, where the copper bar protecting cover 405 is circumferentially arranged along the silicon carbide rod 401 and is located on a side of the insulating ring 402 away from the positioning member 5, which is away from the positioning member 5. In this embodiment, the heating portion 4 further includes a copper bar and a buckle 404, where the buckle 404 is disposed on a side, close to the locating piece 5, of the insulating ring 402 on a side close to the locating piece 5, and an axial arrangement mode that the buckle 404, the insulating ring 402, the supporting ring 403, the insulating ring 402 and the copper bar protecting cover 405 are sequentially disposed along an axial direction is adopted, so that the length of a supporting section of the silicon carbide rod 401 is ensured, the relative freedom of the insulating ring 402 and the supporting ring 403 in an axial direction is ensured, the free thermal expansion of the silicon carbide rod 401 in an axial direction is ensured, and the copper bar protecting cover 405 can effectively solve the insulation problem between the copper bar and the pressure-bearing main casing 201.
Specifically, in the above-described embodiment, referring to fig. 7 and 8, the heat-insulating inner cylinder 2 is prepared by roll welding, and the heat-insulating inner cylinder 2 surface is provided with a heat-insulating material. In this embodiment, the outer cylinder 1 is a main pressure-bearing element of an electric preheating heat accumulating heater, the heat insulating inner cylinder 2 is formed by winding and welding a shell 201 with an open surface, the outer surface is wrapped with a heat insulating material, the heat insulating inner cylinder 2 is coaxially installed with the outer cylinder 1, the heat insulating inner cylinder 2 comprises a shell 201, a welding ring plate 202, a first semicircular connecting pipe 203, a second semicircular connecting pipe 204 and reinforcing ribs 205, after the shell 201 is wound and welded, the heat insulating inner cylinder is assembled and welded with the welding ring plate 202, the first semicircular connecting pipe 203, the second semicircular connecting pipe 204 and the reinforcing ribs 205, the reinforcing ribs 205 are uniformly distributed circumferentially, so that the contact heat transfer area is reduced, the heat insulating material is supported and the heat insulating material is in shape retention, specifically, when the electric preheating heat accumulating heater is vertically assembled, the second semicircular connecting pipe 204 of the heat insulating inner cylinder 2 positioned at the bottom and the outer circle of the support cylinder of the heat accumulating plate assembly 3 reserve a 1mm installation gap, and the outer circle of the first semicircular connecting pipe 203 and the support cylinder of the heat accumulating plate assembly 3 reserve a thermal expansion deformation space of 6mm, so that the unidirectional thermal expansion space of the heat accumulating plate assembly 3 along the axial direction of air flow can be ensured, the heat accumulating plate assembly 3 can be in which the axial length of the heat insulating material is about 250mm, and the thermal expansion of the heat insulating material is preferably 2 mm.
Further, two ends of the heat-insulating inner cylinder body 2 are provided with spigot, and the front end of the spigot is conical. In this embodiment, each heat accumulation piece subassembly 3 around by the thermal-insulated interior barrel 2 parcel of each, the thermal-expansion deformation of casing 201 can be effectively guaranteed to thermal-insulated interior barrel 2 both ends area tang, when thermal-insulated interior barrel 2 and heat accumulation piece subassembly 3 accomplish vertical assembly back, the tang front end of thermal-insulated interior barrel 2 of bottom designs into the circular cone of taking the expansion angle, convenient location installation, has reserved the thermal expansion deformation space simultaneously, can effectively satisfy thermal-expansion deformation coordination in the axial of thermal-insulated interior barrel 2, and specifically, tang expansion angle is 5, and the axial length of thermal-insulated interior barrel 2 is 365mm at the most, and thermal expansion deformation is about 3mm, and the size of reserve thermal deformation is 7.5mm.
Specifically, in the above-described embodiment, referring to fig. 12, the positioning member 5 includes the first cylinder 501 and the second cylinder 502 connected, and a bearing step is formed between the first cylinder 501 and the second cylinder 502 for supporting the heating portion 4. In the present embodiment, the outer diameter of the first cylinder 501 is smaller than the outer diameter of the second cylinder 502, and a bearing step is formed between the first cylinder 501 and the second cylinder 502; in the overall horizontal working state of the heater, when the heating part 4 is vertical to the ground, the positioning piece 5 on the side close to the ground and the first supporting cylinder 301 and the second supporting cylinder 302 on the heat accumulating plate assembly 3 realize the bearing supporting function through the bearing steps, the positioning piece 5 on the side far away from the ground is not contacted with the first supporting cylinder 301 and the second supporting cylinder 302 of the heat accumulating plate assembly 3, the arrangement mode of the first supporting cylinder 301 and the second supporting cylinder 302 realizes single-side radial full constraint, the other one is relatively free, the side of the first supporting cylinder 301 on the heat accumulating plate assembly 3 is free, the overall thermal deformation is upward, the thermal deformation is realized along the direction of a long round hole of the first supporting cylinder 301, and the gap between the positioning piece 5 on the side far away from the ground can meet the thermal expansion deformation of the heating part 4; when the heating part 4 is horizontal with the ground, the positioning piece 5 is matched with the ground, the bottoms of the first supporting cylinder 301 and the second supporting cylinder 302 of the heat accumulating plate assembly 3 are supported by the positioning piece 5, the top is free, the positioning piece 5 adopts the cylindrical surface of the first cylinder 501 to support the weight of the heat accumulating plate assembly 3, meanwhile, the axial directions of the first supporting cylinder 301 and the second supporting cylinder 302 of the heat accumulating plate assembly 3 are free, and the whole thermal deformation is upward and the thermal deformation is carried out along the axial directions of the first supporting cylinder 301 and the second supporting cylinder 302; in the application, a gap of 1mm is reserved between the locating piece 5 and the supporting cylinder at one side, so that the locating piece 5 is conveniently inserted into the first supporting cylinder 301 and the second supporting cylinder 302 during assembly, and meanwhile, the bearing and locating purposes can be achieved; to meet the thermal expansion requirement, when the heating portion 4 is perpendicular to the ground, the length of the positioning member 5 supporting the weight of the thermal storage plate assembly 3 by the load step is long, about 250mm, and the length of the top positioning member 5 is about 237mm.
Specifically, in the above embodiment, the positioning member 5 is in clearance fit with the outer cylinder 1. In this embodiment, the outer cylinder 1 is a main bearing element of the heater, the mating surface between the positioning element 5 and the outer cylinder 1 is used as a final positioning and bearing mating surface, and clearance fit is adopted, meanwhile, the roughness of the mating surface of the positioning element 5 is 3.2, and a groove can be arranged in the middle of the positioning element 5 to reduce the mating length.
In one embodiment of the electric preheating regenerative heater provided by the invention, the specific design dimensions are as follows:
When the heating part 4 of the electric preheating heat accumulating type heater is vertical to the ground, the locating piece 5 at the bottom carries out bearing support on the heat accumulating sheet assembly 3 at the bottom, a thermal expansion deformation space in the vertical direction is reserved between the locating piece 5 at the top and the first supporting cylinder 301 and the second supporting cylinder 302 of the heat accumulating sheet assembly 3, meanwhile, a space for thermal expansion deformation in the horizontal direction is reserved in the direction vertical to the heating part 4 by the first supporting cylinder 301, the vertical dimension of the heat accumulating sheet assembly 3 in the state is 790mm, the thermal expansion deformation is about 6mm, and the reserved thermal deformation dimension is 16mm; the thermal storage plate assembly 3 has a horizontal dimension of 400mm, thermal expansion deformation of about 3mm and a reserved thermal deformation dimension of 7mm;
When the heating part 4 of the electric preheating heat accumulating type heater is parallel to the ground, the positioning piece 5 at the bottom is supported in a bearing way, a thermal expansion deformation space in the vertical direction is reserved between the positioning piece 5 at the top and the first supporting cylinder 301 and the second supporting cylinder 302 of the heat accumulating sheet assembly 3, a thermal expansion deformation space in the horizontal direction is reserved in the axial direction between the first supporting cylinder 301 and the second supporting cylinder 302 at two ends of the heat accumulating sheet 303 assembly and the positioning piece 5, the vertical dimension of the heat accumulating sheet assembly 3 in the state is 400mm, the thermal expansion deformation is about 3mm, and the reserved thermal deformation dimension is 7mm; the horizontal dimension is 790mm, the thermal expansion deformation is about 6mm, and the thermal deformation dimension is 16mm at each of the two ends.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An electric preheating regenerative heater, comprising:
An outer cylinder (1);
at least two heat-insulating inner cylinder bodies (2) coaxially arranged inside the outer cylinder body (1);
The heat storage plate assembly (3) is arranged between two adjacent heat insulation inner cylinders (2), two channels are symmetrically formed in the heat storage plate assembly (3) along the length direction, heating parts (4) are arranged in the two channels, two ends of one channel are connected with a first supporting cylinder (301), two ends of the other channel are connected with a second supporting cylinder (302), each first supporting cylinder (301) and each second supporting cylinder (302) are connected with a positioning piece (5) in a matched mode, each positioning piece (5) comprises a first cylinder (501) and a second cylinder (502) which are connected, a bearing step is formed between the first cylinder (501) and the second cylinder (502), and the bearing step is used for supporting the heat storage plate assembly (3);
The number of the heat storage plate assemblies (3) is at least two, all the heat storage plate assemblies (3) are arranged in the outer cylinder body (1) at equal intervals along the axial direction, and the airflow channels of the adjacent heat storage plate assemblies (3) are arranged in an orthogonal mode;
When the electric preheating storage heater is assembled vertically:
the first supporting cylinder (301) and the second supporting cylinder (302) are respectively matched with the positioning piece (5) to provide bearing positioning for the heat accumulation sheet assembly (3);
when the electric preheating storage heater is used horizontally:
When the heating part (4) is vertical to the ground, the positioning piece (5) close to the ground is used for supporting the heat storage plate assembly (3), and gaps exist between the first supporting cylinder (301) and the second supporting cylinder (302) which are far away from the ground and the positioning piece (5) in the vertical direction, and the gaps are used for providing a thermal expansion space of the heating part (4);
when the heating part (4) is parallel to the ground, the positioning piece (5) supports the heat storage plate assembly (3) in the vertical direction, and gaps are formed between the first support cylinder (301) and the second support cylinder (302) and the positioning piece (5) in the horizontal direction and the vertical upward direction, and are used for providing a thermal expansion space of the heating part (4).
2. The electric preheating regenerative heater according to claim 1, wherein the first supporting cylinder (301) and the second supporting cylinder (302) are cylinders, limiting blocks (3011) are symmetrically arranged at inner holes at two ends of the first supporting cylinder (301), and the distance between the two limiting blocks (3011) is equal to the diameter of the inner hole of the second supporting cylinder (302).
3. An electric preheating regenerative heater as claimed in claim 1, wherein the regenerative sheet assembly (3) further comprises a plurality of regenerative sheets (303), a plurality of the regenerative sheets (303) being detachably connected, the channels passing through the regenerative sheets (303) and being arranged perpendicularly to the regenerative sheets (303).
4. The electric-preheating regenerative heater as claimed in claim 1, wherein the heating section (4) comprises a silicon carbide rod (401), insulating rings (402) and supporting rings (403), the silicon carbide rod (401) is circumferentially arranged along the length direction of the channel, the supporting rings (403) are axially arranged at both ends of the silicon carbide rod (401), and each supporting ring (403) is arranged between two adjacent insulating rings (402).
5. The electric preheating regenerative heater as claimed in claim 4, wherein the heating section (4) further comprises a copper bar cover (405), the copper bar cover (405) being circumferentially arranged along the silicon carbide rod (401) and being located on a side of the insulating ring (402) remote from the positioning member (5) side remote from the positioning member (5).
6. The electric preheating storage heater according to claim 1, wherein the heat-insulating inner cylinder (2) is prepared by roll welding, and a heat-insulating material is provided on the surface of the heat-insulating inner cylinder (2).
7. The electric preheating regenerative heater as claimed in claim 6, wherein the heat insulation inner cylinder (2) is provided with a spigot at both ends, and the front end of the spigot is conical.
8. An electric preheating storage heater according to claim 1, wherein the positioning element (5) is in clearance fit with the outer cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044493.3A CN114459153B (en) | 2022-01-14 | 2022-01-14 | Electric preheating heat accumulating type heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044493.3A CN114459153B (en) | 2022-01-14 | 2022-01-14 | Electric preheating heat accumulating type heater |
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| Publication Number | Publication Date |
|---|---|
| CN114459153A CN114459153A (en) | 2022-05-10 |
| CN114459153B true CN114459153B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210044493.3A Active CN114459153B (en) | 2022-01-14 | 2022-01-14 | Electric preheating heat accumulating type heater |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2616302A1 (en) * | 1975-04-18 | 1976-10-28 | Battelle Memorial Institute | HEAT COLLECTORS FOR HEATING A FLUID |
| RU2176767C1 (en) * | 2000-08-01 | 2001-12-10 | Федеральное государственное унитарное предприятие "Исследовательский Центр им. М.В. Келдыша" | Heat accumulator for gas heating |
| CN204403589U (en) * | 2014-12-11 | 2015-06-17 | 中国航天空气动力技术研究院 | High-temperature and pressure pipeline |
| CN108006691A (en) * | 2016-11-01 | 2018-05-08 | 中石化洛阳工程有限公司 | Eight ways valve U-tube regenerative air preheater |
| CN211982156U (en) * | 2020-01-19 | 2020-11-20 | 镇江东方电热有限公司 | Heating core anti-deformation structure |
| CN112710080A (en) * | 2020-12-30 | 2021-04-27 | 中国航天空气动力技术研究院 | Electric preheating heater suitable for wind tunnel |
| CN112728224A (en) * | 2020-12-30 | 2021-04-30 | 北京航天益森风洞工程技术有限公司 | Cross-cabin sealing structure and equipment |
-
2022
- 2022-01-14 CN CN202210044493.3A patent/CN114459153B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2616302A1 (en) * | 1975-04-18 | 1976-10-28 | Battelle Memorial Institute | HEAT COLLECTORS FOR HEATING A FLUID |
| RU2176767C1 (en) * | 2000-08-01 | 2001-12-10 | Федеральное государственное унитарное предприятие "Исследовательский Центр им. М.В. Келдыша" | Heat accumulator for gas heating |
| CN204403589U (en) * | 2014-12-11 | 2015-06-17 | 中国航天空气动力技术研究院 | High-temperature and pressure pipeline |
| CN108006691A (en) * | 2016-11-01 | 2018-05-08 | 中石化洛阳工程有限公司 | Eight ways valve U-tube regenerative air preheater |
| CN211982156U (en) * | 2020-01-19 | 2020-11-20 | 镇江东方电热有限公司 | Heating core anti-deformation structure |
| CN112710080A (en) * | 2020-12-30 | 2021-04-27 | 中国航天空气动力技术研究院 | Electric preheating heater suitable for wind tunnel |
| CN112728224A (en) * | 2020-12-30 | 2021-04-30 | 北京航天益森风洞工程技术有限公司 | Cross-cabin sealing structure and equipment |
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| Publication number | Publication date |
|---|---|
| CN114459153A (en) | 2022-05-10 |
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