CN115265248A - Internal element supporting device for ultra-large heat accumulating type heater and mounting method - Google Patents
Internal element supporting device for ultra-large heat accumulating type heater and mounting method Download PDFInfo
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- CN115265248A CN115265248A CN202211161320.6A CN202211161320A CN115265248A CN 115265248 A CN115265248 A CN 115265248A CN 202211161320 A CN202211161320 A CN 202211161320A CN 115265248 A CN115265248 A CN 115265248A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
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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
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
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- 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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- Combustion & Propulsion (AREA)
- Resistance Heating (AREA)
Abstract
The invention belongs to the field of hypersonic wind tunnel test equipment and discloses an internal element supporting device for an ultra-large heat accumulating type heater and an installation method. The internal element supporting device gradually reduces the contact area between adjacent internal elements through the supporting ring and the hollow supporting column, so that the heat conduction area of the internal element supporting device is greatly reduced, the heat loss is reduced, and the use safety of the pressure-bearing shell of the heat accumulating type heater can be ensured without increasing the length of the supporting column and the thickness of the heat insulating layer; only two joints of the support column and the backing ring and the lower end enclosure are assembled by welding, and other joints are not welded, so that the heat conductivity is further reduced. The mounting method comprises the steps of assembling and welding a backing ring and a lower end enclosure, assembling and welding a support column and the backing ring, mounting a support ring and mounting a support pore plate. The internal element supporting device and the mounting method can meet the requirement of 2-meter-level large hypersonic speed wind tunnel test airflow heating, and have engineering practicability.
Description
Technical Field
The invention belongs to the field of hypersonic wind tunnel test equipment, and particularly relates to an internal element supporting device for an ultra-large heat accumulating type heater and an installation method.
Background
In a conventional hypersonic wind tunnel using air as a test medium, because the flow velocity of airflow is extremely high and reaches Mach number of 5-10, after the airflow is severely expanded through a spray pipe, water vapor and carbon dioxide in the airflow are condensed to cause nonuniformity of a flow field, so that test data is not accurate, which is not allowed in a hypersonic wind tunnel pneumatic test. Therefore, a heat accumulating type heater needs to be arranged in a conventional hypersonic wind tunnel taking air as a medium, and the airflow is heated to the required condensation preventing temperature.
The heat accumulating type heater is composed of a pressure bearing shell, a heat insulation layer, a heat accumulator and a supporting device, and the structure of the heat accumulating type heater is shown in figure 1. The working principle of the heat accumulating type heater is that a heat accumulator is heated to a required temperature in advance, then cold air flows through the heat accumulator and exchanges heat with the heat accumulator, the cold air flow is heated to a required anti-condensation temperature to form hot air flow, and the hot air flow flows out of the heat accumulating type heater to a downstream spray pipe to form a supersonic flow field. The working temperature of a large heat accumulating type heater of a 2-meter-level large hypersonic wind tunnel is 1373K, the operating pressure range of the wind tunnel is 10Mpa to 12MPa, the maximum air flow is more than 650kg/s, and the maximum Mach number of the downstream air flow speed of the heat accumulating type heater is 10.
In order to meet the requirement of a 2-meter-level large-scale hypersonic wind tunnel test on heating airflow, the total height of the heat accumulating type heater is larger than 17m, and the outer diameter of the cylinder is larger than 3500mm; the height of the heat accumulator inside is more than 12 meters, the weight is more than 300 tons, and the weight of the heat insulation layer is more than 50 tons.
The internal element supporting device is used for supporting the heat accumulator and the heat insulation layer and needs to work under severe working conditions of high temperature, high pressure, large flow, vacuum suction, high pressure scouring and the like for a long time.
The design of the internal element supporting device of the large heat storage type heater of the 2-meter-level large hypersonic wind tunnel faces the following difficulties:
1. the contact area between the heat accumulator and the internal element supporting device as well as between the internal element supporting device and the shell is large, the heat conduction area is large, and the lower end socket is easy to generate local overheating, so that the use safety of the heat accumulating type heater is influenced.
2. The weight of the heat accumulator and the heat insulation layer exceeds 350 tons, the load of the internal element supporting device is large, the internal element supporting device is usually supported by a plurality of solid supporting columns, the heat conduction area is large, the heat loss of the heat accumulating type heater is large, the heat of the lower end socket near the solid supporting columns is concentrated, local overheating is easy to occur, and the use safety of the heat accumulating type heater is influenced.
3. Due to the existence of the plurality of solid support columns, the heat preservation and insulation effect between the lower end enclosure and the solid support columns is weakened, and in order to ensure that the temperatures of the bottoms of the solid support columns and the lower end enclosure are within an allowable range, measures such as prolonging the solid support columns and increasing the thickness of the heat insulation layer are generally required to ensure that the temperature is reduced to be within the allowable range, so that the size of the heat storage heater is increased, and the construction cost is increased.
4. The heat accumulator is formed by stacking layered workpieces, and the support stability of the heat accumulator is difficult to guarantee under the working conditions of long-term high temperature, high pressure and large flow impact.
5. Because the insulating layer contains the pouring material layer of certain thickness, after pouring material layer and the installation of support orifice plate, the support orifice plate can't be dismantled, and the maintenance of lower head internal component is changed difficultly.
There is a need to develop and provide an internal element support apparatus and mounting method for an ultra large storage heater.
Disclosure of Invention
The invention provides an internal element supporting device for an ultra-large heat accumulating type heater and an installation method thereof, aiming at solving the problems that an internal element supporting device is large in heat conduction area, heat loss of the heat accumulating type heater is large, a lower end socket is easy to generate local overheating, supporting stability is difficult to guarantee, internal elements of the lower end socket are difficult to maintain and replace and the like.
The invention relates to an internal element supporting device for an ultra-large heat accumulating type heater, which is characterized by comprising a supporting orifice plate, a supporting ring, a supporting column and a backing ring from top to bottom in sequence;
the supporting columns are circular tubes which are vertically arranged and are uniformly distributed along the circumferential direction of the lower end enclosure, the number of the supporting columns is N, N is more than or equal to 3 and less than or equal to 6, and the central axis of each supporting column is parallel to the central axis of the heat storage heater; the upper surfaces of the support columns are positioned on the same horizontal plane; the upper surface of each supporting column is provided with an arc-shaped groove, and the arc-shaped grooves of the supporting columns are positioned on the same circular groove; the tail end of each supporting column is welded with a backing ring, the shape of the backing ring is annular and is matched with the spherical inner wall surface of the lower end enclosure, the backing ring is welded on the spherical inner wall surface of the lower end enclosure, and each supporting column is fixed on the spherical inner wall surface of the lower end enclosure through the backing ring;
the support ring is a circular ring matched with the circular groove and is fixed on the arc-shaped groove of each support column, and the side walls on two sides of the support ring and the side wall surface corresponding to the arc-shaped groove are provided with isolation gaps;
the supporting pore plate is a disc-shaped pore plate with an inspection manhole in the center, the supporting pore plate is fixed on the upper surface of the supporting ring, the outer diameter of the supporting pore plate is smaller than the inner diameter of a pressure-bearing shell of the heat storage type heater, and the supporting pore plate is provided with a through hole array matched with an airflow through hole of a heat accumulator of the heat storage type heater.
Furthermore, the manhole of the support hole plate is a stepped hole, the height of the lower end hole and the height of the upper end hole of the manhole are the same, the aperture of the lower end hole is DN400, and the aperture of the upper end hole is DN500; the stepped hole is provided with a matched cover plate, and the cover plate is positioned through a stepped surface; three threaded holes are uniformly formed in the upper surface of the cover plate and used for assisting in disassembling and assembling the cover plate; after the cover plate is placed in the stepped hole, the upper surface of the cover plate and the upper surface of the support hole plate are positioned on the same horizontal plane; the through holes on the cover plate are matched with the support pore plate to form a continuous through hole array.
Further, the horizontal inclination angle of the upper surface of the supporting orifice plate is less than 0.05 °.
Furthermore, the width of the isolation gap of the support ring is 1mm, and the widths of the isolation gaps on the two sides are the same.
Further, the height of the support ring is 2 times of the thickness of the support ring, and the height of the support ring is equal to the depth of the arc-shaped groove.
Further, the vertical inclination angle of each support column is less than 0.05 °.
Furthermore, an external water-cooling interlayer is arranged on the lower end socket, the height of a cooling water flow channel of the external water-cooling interlayer is 100mm, and cooling is performed in a cooling water flowing mode of downward inlet and upward outlet.
The invention discloses an installation method of an internal element supporting device for an ultra-large heat accumulating type heater, which comprises the following steps:
s10, assembling and welding a backing ring and a lower end enclosure;
uniformly distributing the backing rings on the inner wall surface of the lower end enclosure along the circumferential direction, adjusting the levelness of each backing ring, welding each backing ring on the inner wall surface of the lower end enclosure, and polishing and flattening a welding line after welding;
s20, assembling and welding the support column and the backing ring;
inserting each support column into the corresponding cushion ring, adjusting the position and the posture of each support column, and ensuring that the support columns have the same height and are uniformly distributed along the circumferential direction of the inner wall surface of the lower end socket; ensuring that the central axis of each support column is parallel to the central axis of the heat accumulating type heater, and ensuring that the vertical inclination angle is less than 0.05 degrees; after welding, polishing the upper surfaces of the support columns to ensure that the upper surfaces of the support columns are on the same horizontal plane, wherein the horizontal inclination angle is less than 0.05 degrees;
s30, mounting a support ring;
placing the support ring on the arc-shaped groove of each support column, and adjusting the position of the support ring to ensure that the side walls on two sides of the support ring and the side wall surfaces corresponding to the arc-shaped grooves have isolation gaps with the same width; polishing the upper surface of each support ring to ensure that the horizontal inclination angle of the upper surface of each support ring is less than 0.05 degree;
s40, mounting a support pore plate;
the supporting pore plate is hoisted in place and placed on the supporting ring, 6 wedges are uniformly arranged along the outer edge of the supporting pore plate, the inner sides of the wedges tightly support the edge of the supporting pore plate, and the outer sides of the wedges tightly support the inner wall surface of the pressure-bearing shell; by adjusting the 6 wedges, the wedges are uniformly distributed along the circumferential direction and tightly propped against the inner wall of the pressure-bearing shell; adjusting the levelness of the upper surface of the supporting pore plate to ensure that the horizontal inclination angle is less than 0.05 degrees; and then fixing the supporting pore plate and the wedge by spot welding, assembling and welding the cylinder body and the upper end enclosure, and removing the wedge after the pressure-bearing shell is installed in place in a use site to finish installation.
The internal element supporting device for the ultra-large heat accumulating type heater gradually reduces the contact area between adjacent internal elements through the supporting ring and the hollow supporting columns, so that the heat conduction area of the internal element supporting device is greatly reduced, the heat loss is reduced, and the use safety of a pressure-bearing shell of the heat accumulating type heater can be ensured without increasing the length of the supporting columns and the thickness of a heat insulation layer; only two joints of the support column and the backing ring and the lower end enclosure are assembled by welding, and other joints are not welded, so that the heat conductivity is further reduced.
The outer diameter of the supporting pore plate in the internal element supporting device for the ultra-large heat accumulating type heater is smaller than the inner diameter of the pressure-bearing shell, and the circumference of the supporting pore plate is not in any contact with the pressure-bearing shell, so that the heat conduction area is reduced, and the heat loss is reduced; a heat insulation layer composed of a casting material layer and a fiber cotton layer is filled between the supporting pore plate and the pressure-bearing shell, the casting material layer can prevent heat insulation dead zones, and the fiber cotton layer can reduce heat conductivity coefficient and heat loss; through polishing the support column upper surface, guarantee that the horizontal inclination of support orifice plate upper surface is less than 0.05, guarantee simultaneously that the air current through-hole is completely perpendicular with the support plate surface, guarantee that the heat accumulator does not take place slope and support stability problem.
The center of the supporting pore plate in the internal element supporting device for the ultra-large heat accumulating type heater is provided with the maintenance manhole, the maintenance manhole is matched with the supporting pore plate by adopting steps, the installation is convenient, the planeness is high after the installation, and the installation and the maintenance of internal elements of the lower end socket are convenient; the aperture of the lower end hole of the inspection manhole is DN400, the aperture of the upper end hole is DN500, and the step is arranged at the position of half the thickness of the supporting pore plate; a cover plate with the same specification and size as the inspection manhole is arranged at the inspection manhole, and threaded holes are uniformly formed in the upper surface of the cover plate and used for detaching and installing the cover plate; the cover plate and the support pore plate are matched to process an airflow circulation hole, and holes at the edges of the cover plate and the support pore plate need to be reserved, so that the hole opening position and the hole opening proportion of the whole support pore plate are not changed.
The support ring used in the internal element supporting device of the ultra-large heat accumulating type heater is a complete circular ring and is placed in the arc-shaped groove on the support column, the height of the support ring is 2 times of the thickness, the height of the support ring is consistent with the depth of the arc-shaped groove on the support column, the thickness of the support ring is 2mm smaller than the width of the arc-shaped groove on the support column, a gap of 1mm is arranged between each of two sides of the support ring and the corresponding side surface of the arc-shaped groove, under the condition that the requirement of the support strength is guaranteed, the support ring does not contact with the side surface of the support column, a heat conduction discontinuous surface is formed, the contact area between the support ring and the support column can be reduced to the maximum extent, and the heat conduction area is reduced.
The number of the support columns in the internal element support device for the ultra-large heat accumulating type heater is 3-6 according to the internal support weight, and the support columns are arranged at the same height position of the lower end socket and are uniformly distributed along the circumferential direction; the supporting column adopts a circular tube with an internal hollow structure, so that the contact area of the supporting ring and the supporting column is further reduced, and the heat conduction area is reduced; simultaneously, the outer diameter of the support column is increased, the circumferential heat conduction distance is prolonged, and the temperature of the lower end of the support column is reduced; be provided with on every support column with support ring assorted arc recess, guarantee that the support ring installation is steady.
The backing ring in the internal element supporting device for the ultra-large heat accumulating type heater is a complete ring and is arranged at the bottom of the supporting column, the arc length of the backing ring along the height direction of the lower end socket is greater than the arc length between the lowest point and the highest point of the corresponding position of the supporting column, the strength of the lower end socket is increased, the stress area of the supporting position of the lower end socket is increased, the supporting load on the unit area of the lower end socket is reduced, the supporting strength and the supporting stability are ensured, meanwhile, the heat at the lower end of the supporting column is uniformly transferred to the lower end socket, and the heat is prevented from being concentrated near the supporting column; meanwhile, an external water-cooling interlayer is arranged on the lower end enclosure, the height of a cooling water flow channel of the external water-cooling interlayer is 100mm, and the lower end enclosure is cooled in a flowing mode of cooling water which enters from bottom to top, so that the lower end enclosure is further prevented from being over-heated, and the use safety of the heat storage heater is ensured.
The internal element supporting device for the ultra-large heat accumulating type heater and the mounting method have the following advantages that:
1. the support pore plate, the support ring, the hollow support column and the backing ring are combined for supporting, so that the contact area among all support parts is greatly reduced;
2. the left side surface and the right side surface of the support ring are not contacted with the support legs, so that the contact area between the support ring and the support legs is reduced;
3. the supporting legs adopt an internal hollow structure, so that the contact area between the supporting ring and the supporting legs is further reduced, and the heat conduction area and the heat loss are reduced;
4. the cushion ring is arranged between the supporting legs and the lower end socket, so that the strength of the lower end socket is increased, the contact area between the internal element supporting device and the lower end socket is increased, the supporting load on the unit area of the lower end socket is reduced, the heat dissipation area of the lower end socket is increased, and the heat is prevented from being concentrated near the supporting legs.
5. In the installation process of the internal element supporting device, the mode of checking and adjusting while installing is adopted, the verticality of the supporting column and the levelness of the upper surfaces of all the parts are ensured, and the stability of the whole internal element supporting device and the heat accumulator is ensured.
The internal element supporting device for the ultra-large heat accumulating type heater and the mounting method can meet the airflow heating requirement of a 2-meter-level large hypersonic speed wind tunnel test, and have engineering practicability.
Drawings
Fig. 1 is a schematic view of a storage heater;
fig. 2 is a schematic structural view of an internal element supporting device for an ultra-large storage heater according to the present invention;
fig. 3 is a partially enlarged view of an internal element supporting device for an ultra-large storage heater according to the present invention;
fig. 4 is a schematic view illustrating an assembly of a support ring and support pillars in an internal element supporting apparatus for an ultra-large type storage heater according to the present invention;
fig. 5 is a schematic view illustrating an assembly structure of support pillars in the supporting device for internal components of an ultra-large type storage heater according to the present invention.
In the figure, 1, an orifice plate is supported; 2. a support ring; 3. a support pillar; 4. a backing ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 2 to 5, the internal element supporting device for an ultra-large heat storage type heater of the present embodiment is characterized in that the internal element supporting device sequentially comprises a supporting orifice plate 1, a supporting ring 2, a supporting column 3 and a backing ring 4 from top to bottom;
the supporting columns 3 are circular tubes which are vertically arranged and are uniformly distributed along the circumferential direction of the lower end socket, the number of the supporting columns 3 is N, N is not less than 3 and not more than 6, and the central axis of each supporting column 3 is parallel to the central axis of the heat storage heater; the upper surfaces of the support columns 3 are positioned on the same horizontal plane; the upper surface of each supporting column 3 is provided with an arc-shaped groove, and the arc-shaped grooves of the supporting columns 3 are positioned on the same circular groove; the tail end of each supporting column 3 is welded with a backing ring 4, the backing ring 4 is annular and is matched with the spherical inner wall surface of the lower end socket, the backing ring 4 is welded on the spherical inner wall surface of the lower end socket, and each supporting column 3 is fixed on the spherical inner wall surface of the lower end socket through the backing ring 4;
the support ring 2 is a circular ring matched with the circular groove and is fixed on the arc-shaped groove of each support column 3, and the side walls of the two sides of the support ring 2 and the side wall surfaces corresponding to the arc-shaped grooves are provided with isolation gaps;
the supporting pore plate 1 is a disc-shaped pore plate with an inspection manhole at the center, the supporting pore plate 1 is fixed on the upper surface of the supporting ring 2, the outer diameter of the supporting pore plate 1 is smaller than the inner diameter of a pressure-bearing shell of the heat accumulating type heater, and the supporting pore plate 1 is provided with a through hole array matched with an airflow through hole of a heat accumulator of the heat accumulating type heater.
Furthermore, the manhole of the support hole plate 1 is a stepped hole, the height of the lower end hole and the height of the upper end hole of the manhole are the same, the aperture of the lower end hole is DN400, and the aperture of the upper end hole is DN500; the stepped hole is provided with a matched cover plate, and the cover plate is positioned through the stepped surface; three threaded holes are uniformly formed in the upper surface of the cover plate and used for assisting in disassembling and assembling the cover plate; after the cover plate is placed in the stepped hole, the upper surface of the cover plate and the upper surface of the supporting hole plate 1 are positioned on the same horizontal plane; the through holes on the cover plate are matched with the support pore plate 1 to form a continuous through hole array.
Further, the horizontal inclination angle of the upper surface of the support orifice plate 1 is less than 0.05 °.
Further, the width of the isolation gap of the support ring 2 is 1mm, and the widths of the isolation gaps on the two sides are the same.
Further, the height of the support ring 2 is 2 times of the thickness of the support ring 2, and the height of the support ring 2 is equal to the depth of the arc-shaped groove.
Further, the vertical inclination angle of each supporting column 3 is less than 0.05 °.
Furthermore, an external water-cooling interlayer is arranged on the lower end socket, the height of a cooling water flow channel of the external water-cooling interlayer is 100mm, and cooling is performed in a cooling water flowing mode of downward inlet and upward outlet.
The installation method of the internal element supporting device for the ultra-large heat accumulating type heater comprises the following steps:
s10, assembling and welding a backing ring 4 and a lower end enclosure;
uniformly distributing the backing rings 4 on the inner wall surface of the lower end enclosure along the circumferential direction, adjusting the levelness of each backing ring 4, welding each backing ring 4 on the inner wall surface of the lower end enclosure, and polishing and flattening weld joints after welding;
s20, assembling and welding the support column 3 and the backing ring 4;
inserting each support column 3 into the corresponding backing ring 4, adjusting the position and the posture of each support column 3, and ensuring that the height of each support column 3 is the same and the support columns are uniformly distributed along the circumferential direction of the inner wall surface of the lower end socket; ensuring that the central axis of each support column 3 is parallel to the central axis of the heat accumulating type heater, and the vertical inclination angle is less than 0.05 degrees; after welding is finished, polishing the upper surface of each support column 3 to ensure that the upper surfaces of the support columns 3 are on the same horizontal plane, and the horizontal inclination angle is less than 0.05 degree;
s30, mounting a support ring 2;
placing the support ring 2 on the arc-shaped groove of each support column 3, and adjusting the position of the support ring 2 to ensure that the side walls on two sides of the support ring 2 and the side wall surfaces corresponding to the arc-shaped grooves have isolation gaps with the same width; polishing the upper surface of each support ring 2 to ensure that the horizontal inclination angle of the upper surface of each support ring 2 is less than 0.05 degrees;
s40, mounting a support pore plate 1;
the supporting pore plate 1 is hoisted in place and placed on the supporting ring 2, 6 wedges are uniformly arranged along the outer edge of the supporting pore plate 1, the inner side of each wedge tightly props against the edge of the supporting pore plate 1, and the outer side of each wedge tightly props against the inner wall surface of the pressure-bearing shell; by adjusting the 6 wedges, the wedges are uniformly distributed along the circumferential direction and tightly propped against the inner wall of the pressure-bearing shell; adjusting the levelness of the upper surface of the support pore plate 1 to ensure that the horizontal inclination angle is less than 0.05 degrees; and then fixing the supporting orifice plate 1 and the wedge by spot welding, assembling and welding the cylinder body and the upper end enclosure, and removing the wedge after the pressure-bearing shell is installed in place in a use site to finish installation.
Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, but it can be applied to various fields suitable for the present invention. Additional modifications and refinements will readily occur to those skilled in the art without departing from the principles of the present invention, and the present invention is not limited to the specific details and illustrations shown and described herein.
Claims (8)
1. An internal element supporting device for an ultra-large heat accumulating heater is characterized by comprising a supporting pore plate (1), a supporting ring (2), a supporting column (3) and a backing ring (4) from top to bottom in sequence;
the supporting columns (3) are circular tubes which are vertically arranged and are uniformly distributed along the circumferential direction of the lower end socket, the number of the supporting columns (3) is N, N is more than or equal to 3 and less than or equal to 6, and the central axis of each supporting column (3) is parallel to the central axis of the heat storage heater; the upper surfaces of the support columns (3) are positioned on the same horizontal plane; the upper surface of each supporting column (3) is provided with an arc-shaped groove, and the arc-shaped grooves of the supporting columns (3) are positioned on the same circular groove; the tail ends of the support columns (3) are respectively welded with a backing ring (4), the backing rings (4) are annular and are matched with the spherical inner wall surface of the lower end enclosure, the backing rings (4) are welded on the spherical inner wall surface of the lower end enclosure, and the support columns (3) are fixed on the spherical inner wall surface of the lower end enclosure through the backing rings (4);
the support ring (2) is a circular ring matched with the circular groove and is fixed on the arc-shaped groove of each support column (3), and the side walls of the two sides of the support ring (2) and the side wall surface corresponding to the arc-shaped groove are provided with an isolation gap;
the supporting pore plate (1) is a disc-shaped pore plate with an inspection manhole at the center, the supporting pore plate (1) is fixed on the upper surface of the supporting ring (2), the outer diameter of the supporting pore plate (1) is smaller than the inner diameter of a pressure-bearing shell of the heat storage type heater, and the supporting pore plate (1) is provided with a through hole array matched with an airflow through hole of a heat accumulator of the heat storage type heater.
2. An internal element support device for very large storage heaters as claimed in claim 1, wherein the manhole of the support hole plate (1) is a stepped hole, the height of the lower end hole and the upper end hole of the manhole are the same, the diameter of the lower end hole is DN400, and the diameter of the upper end hole is DN500; the stepped hole is provided with a matched cover plate, and the cover plate is positioned through a stepped surface; three threaded holes are uniformly formed in the upper surface of the cover plate and used for assisting in dismounting and mounting the cover plate; after the cover plate is placed in the stepped hole, the upper surface of the cover plate and the upper surface of the supporting hole plate (1) are positioned on the same horizontal plane; the through holes on the cover plate are matched with the support pore plate (1) to form a continuous through hole array.
3. An internal element support arrangement for a very large storage heater as claimed in claim 1, in which the horizontal inclination of the upper surface of the support aperture plate (1) is less than 0.05 °.
4. An internal element support arrangement for a very large storage heater as claimed in claim 1, wherein the support ring (2) has a gap width of 1mm, the gap widths being the same on both sides.
5. An internal element support device for an oversized regenerative heater according to claim 1, characterised in that the height of the support ring (2) is 2 times the thickness of the support ring (2), the height of the support ring (2) being equal to the depth of the arc-shaped groove.
6. An internal element support arrangement for a very large storage heater as claimed in claim 1, in which the vertical inclination of the support columns (3) is less than 0.05 °.
7. An internal element support device for an ultra-large heat storage heater as claimed in claim 1, wherein the lower head is provided with an external water cooling interlayer, the height of the cooling water flow passage of the external water cooling interlayer is 100mm, and the internal element support device is cooled by adopting a flow mode of cooling water which flows from bottom to top.
8. A method of mounting an internal element support for an ultra-large storage heater as claimed in any one of claims 1 to 7, wherein the method comprises the steps of:
s10, assembling and welding a backing ring (4) and a lower end socket;
uniformly distributing the backing rings (4) on the inner wall surface of the lower end enclosure along the circumferential direction, adjusting the levelness of each backing ring (4), welding each backing ring (4) on the inner wall surface of the lower end enclosure, and polishing and flattening the welding line after welding;
s20, assembling and welding the support pillar (3) and the backing ring (4);
inserting the support columns (3) into the corresponding backing rings (4), adjusting the position and the posture of each support column (3), and ensuring that the support columns (3) have the same height and are uniformly distributed along the circumferential direction of the inner wall surface of the lower end socket; ensuring that the central axis of each support column (3) is parallel to the central axis of the heat storage type heater, and ensuring that the vertical inclination angle is less than 0.05 degrees; after welding is finished, polishing the upper surface of each support pillar (3) to ensure that the upper surfaces of the support pillars (3) are on the same horizontal plane, and the horizontal inclination angle is less than 0.05 degree;
s30, mounting a support ring (2);
placing the support ring (2) on the arc-shaped groove of each support column (3), and adjusting the position of the support ring (2) to ensure that the side walls on two sides of the support ring (2) and the side wall surfaces corresponding to the arc-shaped grooves have the same width of isolation gaps; polishing the upper surface of each support ring (2) to ensure that the horizontal inclination angle of the upper surface of each support ring (2) is less than 0.05 degrees;
s40, mounting a supporting pore plate (1);
the supporting pore plate (1) is hoisted in place and placed on the supporting ring (2), 6 wedges are uniformly arranged along the outer edge of the supporting pore plate (1), the inner sides of the wedges tightly support the edge of the supporting pore plate (1), and the outer sides of the wedges tightly support the inner wall surface of the pressure-bearing shell; by adjusting the 6 wedges, the wedges are uniformly distributed along the circumferential direction and tightly propped against the inner wall of the pressure-bearing shell; adjusting the levelness of the upper surface of the support pore plate (1) to ensure that the horizontal inclination angle is less than 0.05 degrees; and then fixing the supporting pore plate (1) and the wedge by spot welding, assembling and welding the cylinder body and the upper end enclosure, and removing the wedge after the pressure-bearing shell is installed in place in a use site to finish installation.
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