CN112240719B - Hollow brick heat accumulator structure and heat accumulation type heater - Google Patents
Hollow brick heat accumulator structure and heat accumulation type heater Download PDFInfo
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- CN112240719B CN112240719B CN202011126078.XA CN202011126078A CN112240719B CN 112240719 B CN112240719 B CN 112240719B CN 202011126078 A CN202011126078 A CN 202011126078A CN 112240719 B CN112240719 B CN 112240719B
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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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- 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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Abstract
The invention discloses an air brick heat accumulator structure and a heat accumulating type heater, wherein the air brick heat accumulator structure comprises a plurality of layers of air brick units; each layer of hollow brick unit comprises a cylindrical hollow brick and an annular hollow brick; the annular hollow brick is coaxially arranged outside the cylindrical hollow brick, and the excircle surface of the cylindrical hollow brick is contacted with the inner annular surface of the annular hollow brick; the annular hollow brick is formed by splicing a plurality of first fan-shaped hollow bricks and a plurality of second fan-shaped hollow bricks which are same in shape, size and quantity at intervals; the upper layer hollow brick and the lower layer hollow brick are connected through an axial positioning column; all the first through holes in the cylindrical hollow brick are arranged in an S shape along the central axis in a periodic and symmetrical mode, and all the second through holes of the first fan-shaped hollow brick and the second fan-shaped hollow brick are distributed in a V shape. The structural stability among all the components in the structure is good, the special through hole layout form effectively prevents the hollow brick from thermal stress cracking, improves the thermal stability and thermal shock resistance, and prolongs the service life.
Description
Technical Field
The invention relates to a hollow brick heat accumulator structure, in particular to a hollow brick heat accumulator structure for a heat accumulating type heater, which can be applied to a high-temperature pure air test system of a scramjet direct-connection test bed and other heat accumulating type heater systems.
Background
The scramjet direct-connection test bed of the heat accumulating type heating technology utilizes a conventional heat source to generate heat and store the heat in a heat accumulating bed material, and during the subsequent test, the heat energy is transferred from the heat accumulating material to a high-pressure air flow to increase the air temperature so as to form a high-temperature high-pressure simulated incoming flow.
The development and application of foreign storage heaters has mainly focused on the united states (e.g., NASA, ASE corporation and aecc), france and japan (NAL), and the ASE of the united states started the heat transfer analysis, material development and design technology research of such heaters as early as the 20 th century in the 60-70 s. Theoretically, the hollow brick type heat accumulating type heater can generate high-temperature air and can supply high-enthalpy pure air which is pollution-free and meets the requirements of chemical and physical properties, so that the mode that the hollow brick type heat accumulating type heater is adopted by the scramjet direct-connection test bed to provide a heat source is a current trend.
However, the hollow brick heat accumulator is one of the core and the key of the hollow brick type heat storage heater design, and mainly has the following key problems:
1. thermal shock stability problem: the hollow brick heat accumulator works in a state of rapid cooling and rapid heating, bears high temperature action and causes stress change due to the change of internal and external temperature difference, the hollow brick heat accumulator can crack, the generated dust and particles can cause the pollution of a heat accumulator heating system, and even damage equipment such as a high-temperature valve.
2. The problem of air flow deviation: in the preheating and pressurizing working process of the heat accumulator heating system, if the air flow of the through hole flow channel in the heat accumulator has bias flow, thermal stress is generated, the heat accumulator is easy to break, and meanwhile, the flow resistance is increased, so that the heat accumulator floats.
3. The heat accumulator arrangement problem is as follows: the heat capacity of the heat accumulator heater system is required to be more than 20 times of the release amount, the whole heat accumulator has a large structure and a high height, and a reasonable structural layout needs to be designed, so that on one hand, installation and positioning need to be considered, the whole heat accumulator is placed obliquely, and the operation and maintenance are convenient; on the other hand, the structural stability and shock resistance of the whole heat accumulator are improved.
At present, no record is available in the prior art for the specific structure of the heat accumulator in the hollow brick type heat storage heater, so in order to meet the research of the hollow brick type heat storage heater, it is urgently needed to provide a heat accumulator structure to meet the current requirement.
Disclosure of the invention
The technical problem to be solved by the invention is as follows: the hollow brick heat accumulator structure is matched with a lock catch and installed in an overlapped mode, positioning between parts is clear, maintainability is high, structural stability is good, thermal stress cracking of a hollow brick is effectively prevented through a special airflow runner layout mode, thermal stability and thermal shock resistance are improved, and the service life of the hollow brick is prolonged.
The technical solution of the invention is as follows: the hollow brick heat accumulator structure comprises a plurality of layers of hollow brick units;
each layer of hollow brick unit comprises a cylindrical hollow brick and an annular hollow brick;
the cylindrical hollow brick is placed in the middle; the annular hollow brick is coaxially arranged outside the cylindrical hollow brick, and the excircle surface of the cylindrical hollow brick is contacted with the inner annular surface of the annular hollow brick;
the annular hollow brick is formed by splicing a plurality of first fan-shaped hollow bricks and a plurality of second fan-shaped hollow bricks which are same in shape, size and quantity at intervals;
the small end arc surface of each first fan-shaped hollow brick and the cylindrical hollow brick are positioned through concave-convex snap fasteners;
the cylindrical hollow brick is provided with an N-level first through hole group from the center to the edge, wherein: the first-stage through hole group is a first through hole arranged in the center of the cylindrical hollow brick;
the 2 nd to N th level first through hole groups meet the following conditions:
A. the 2 nd to N-stage first through holes are respectively positioned on N-1 reference circles, and all the reference circles take the center of the cylindrical hollow brick as the center of a circle and are distributed at equal intervals; each stage of the first through hole group comprises a plurality of first through holes;
b: the number of the first through holes in each level of through hole group is sequentially increased in an arithmetic progression mode; the number difference of the first through holes between every two adjacent stages of the first through hole groups is 6;
c: establishing a coordinate system X0Y by taking the center of the cylindrical hollow brick as the origin of coordinates; the connecting line between the center of the first through hole closest to the Y axis in the 2 nd to N-th grade through hole groups and the origin of coordinates is marked as L2To LN，L2The included angle between the Y axis and the Y axis is 0 and L3The included angle between the Y axis and the Y axis is alpha and L2To LNThe included angle between the Y axis and the Y axis is sequentially increased by taking alpha as an equal difference;
the value range of alpha is 5-10 degrees;
m-level second through hole groups are arranged from the small-end arc surface to the large-end arc surface of each of the first fan-shaped hollow brick and the second fan-shaped hollow brick; the setting of the M-level second through hole group meets the following conditions:
a: the M-level second through hole groups are respectively positioned on M reference circles, and all the reference circles take the center of the cylindrical hollow brick as the center of a circle and are distributed at equal intervals;
b: each second through hole group comprises two semicircular through holes respectively positioned at the edges of two sides of the first fan-shaped hollow brick or the second fan-shaped hollow brick and a plurality of second through holes positioned between the two semicircular through holes; the plurality of second through holes and the two semicircular through holes are uniformly distributed in the circumferential direction of the reference circle as a whole;
the number of the second through holes in each level of second through hole group is sequentially increased in an arithmetic progression mode; the number difference of the second through holes between every two adjacent second through hole groups is 1;
the first through hole and the second through hole have the same aperture.
Furthermore, the concave-convex snap fastener comprises a concave part and a convex part; the concave part is positioned at the center of the small-end arc surface of the first fan-shaped hollow brick and comprises two first half blind holes and a groove; the two first half blind holes are respectively arranged on the upper surface and the lower surface of the first fan-shaped hollow brick, and the groove is arranged between the two first half blind holes;
the convex part is positioned on the outer surface of the cylindrical hollow brick, corresponds to the concave part and comprises two second semi-blind holes and a convex part; the two second half-blind holes are respectively arranged on the upper surface and the lower surface of the cylindrical hollow brick, and the bulge is arranged between the two second half-blind holes;
the first half blind hole and the second half blind hole positioned at the upper end form an upper end round blind hole; the first half blind hole and the second half blind hole positioned at the lower end form a lower end round blind hole;
the shape and the size of the groove and the bulge are matched.
Furthermore, an axial positioning column is also arranged between every two adjacent layers of hollow brick units; one end of the axial positioning column is matched with the circular blind hole at the lower end of the upper layer hollow brick unit, and the other end of the axial positioning column is matched with the circular blind hole at the upper end of the lower layer hollow brick unit, so that positioning between the two layers of hollow brick units is realized.
Further, the groove is an arc-shaped groove, the protrusion is an arc-shaped protrusion, and the concave-convex snap fastener matched with the arc-shaped protrusion is eccentrically arranged relative to the upper-end round blind hole or the lower-end round blind hole.
Furthermore, the diameter of the circular arc of the concave-convex snap fastener is 2/3-3/4 of the diameter of the upper end circular blind hole or the lower end circular blind hole, and the eccentric amount of the concave-convex snap fastener relative to the upper end circular blind hole or the lower end circular blind hole is 1/6-1/8 of the diameter of the circular blind hole.
Further, the cylindrical hollow brick, the first fan-shaped hollow brick and the second fan-shaped hollow brick are made of zirconia or alumina ceramics, and the purity is not lower than 90%.
Furthermore, the ratio of the center distance between the two adjacent first through holes to the aperture of the first through hole is 1.4-1.6; the ratio of the center distance between two adjacent second through holes to the aperture of the second through hole is 1.4-1.6.
In addition, the invention also provides a heat accumulating type heater adopting the heat accumulator structure.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the hollow brick heat accumulator structure, the heat accumulator through holes are arranged according to concentric circles, the diameters of the distributed circles and the number of the through holes are increased by multiples, the cylindrical hollow brick through holes are periodically arranged in an S shape, the through holes in the first fan-shaped hollow brick and the second fan-shaped hollow brick are symmetrically arranged in a V shape, the central lines of the through holes are prevented from penetrating along the radial direction by the special distribution mode, the thermal stress cracking of the hollow brick is effectively avoided, and the thermal stability, the thermal shock resistance and the service life of the hollow brick can be improved.
2. According to the hollow brick heat accumulator structure, the concave-convex arc snap fasteners are adopted to realize the connection between the cylindrical hollow bricks and the fan-shaped hollow bricks in each layer of hollow brick units, and the axial positioning columns are adopted to realize the connection between each layer of hollow brick units, so that the parallel through hole heat accumulator structure which is closely spaced and uniformly distributed is formed, the through hole blockage caused by the dislocation of the hollow bricks in the convection heat exchange and ventilation process is effectively prevented, the whole structure is compact, the positioning is clear, the assembly is convenient, and the maintainability, the structural stability and the shock resistance are good.
Drawings
FIG. 1 is a schematic perspective view of an embodiment;
FIG. 2 is a top view of a single layer thermal storage brick unit;
fig. 3 is a perspective view showing a projection in a single-layer heat-accumulative brick unit;
fig. 4 is a perspective view showing a depressed portion in a single-layered heat-accumulative brick unit;
FIG. 5 is a diagram showing another example of the heat-accumulative brick units in a comparative test after use;
fig. 6 is a real view of the heat storage brick unit of the present embodiment after use.
The reference numbers are as follows:
1-cylindrical hollow brick, 2-annular hollow brick, 3-first fan-shaped hollow brick, 4-second fan-shaped hollow brick, 5-concave-convex snap fastener, 6-first through hole group, 7-first through hole, 8-second through hole group, 9-semicircular through hole, 10-second through hole, 11-concave part, 12-convex part, 13-first semi-blind hole, 14-groove, 15-second semi-blind hole, 16-convex part and 17-axial positioning column.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
The present embodiment provides a specific structure of a cavity brick heat accumulator structure, as shown in fig. 1 and fig. 2, which includes a plurality of layers of cavity brick units (for convenience of description, only the structure of two layers of cavity brick units is shown in the drawings, the number of specific cavity brick units and the total height of the final cavity brick heat accumulator structure are determined according to the heat capacity of the refractory material, and the heat consumption is generally more than 20 times higher);
each layer of hollow brick unit comprises a cylindrical hollow brick 1 and an annular hollow brick 2 (in the embodiment, the cylindrical hollow brick 1 and the annular hollow brick 2 are made of high-purity zirconia or alumina ceramics, and the purity is not lower than 90%);
the cylindrical hollow brick 1 is placed in the center; the annular hollow brick 2 is coaxially arranged outside the cylindrical hollow brick 1, and the outer circle surface of the cylindrical hollow brick 1 is contacted with the inner ring surface of the annular hollow brick 2;
the annular hollow brick 2 is formed by splicing a plurality of first fan-shaped hollow bricks 3 and a plurality of second fan-shaped hollow bricks 4 which are the same in shape, size and number at intervals (in the embodiment, the number of the first fan-shaped hollow bricks 3 and the number of the second fan-shaped hollow bricks 4 are 3, but not limited to the number, and can be changed as the case may be);
the small end arc surface of each first fan-shaped hollow brick 3 and the cylindrical hollow brick 1 are positioned through the concave-convex snap fastener 5, so that the structural stability is greatly improved;
the cylindrical hollow brick 1 is provided with an N-level first through hole group 6 from the center to the edge, wherein: the first-stage through hole group 6 is a first through hole 7 arranged in the center of the cylindrical hollow brick 1; n is greater than or equal to 3;
the 2 nd to N th stages of the first through-hole group 6 are set to satisfy the following conditions:
A. the 2 nd to N-stage first through hole groups 6 are respectively positioned on N-1 reference circles, and all the reference circles are distributed at equal intervals by taking the center of the cylindrical hollow brick 1 as the center of a circle; each stage of the first through hole group 6 includes a plurality of first through holes 7 therein;
b: the number of the first through holes 7 in each stage of through hole group 6 is sequentially increased in an arithmetic progression mode; the number difference of the first through holes 7 between every two adjacent stages of the first through hole groups 6 is 6;
c: establishing a coordinate system X0Y by taking the center of the cylindrical hollow brick 1 as the origin of coordinates; the connecting line between the center of the first through hole 7 closest to the Y axis in the 2 nd to N-th through hole groups 6 and the origin of coordinates is marked as L2To LN，L2The included angle between the Y axis and the Y axis is 0 and L3The included angle between the Y axis and the Y axis is alpha and L2To LNThe included angle between the Y axis and the Y axis is sequentially increased by taking alpha as an equal difference;
the value range of alpha is 5-10 degrees;
summarizing the arrangement characteristics of the first through holes 7 on the cylindrical hollow brick 1, and combining with the attached drawing 2, the first through holes 7 of the cylindrical hollow brick 1 are arranged in an S-shaped periodic symmetry manner along the central axis (the curve at the A position in the drawing 2 is S-shaped), and do not have a hole central line to run through along the radial direction of the cylinder, thereby effectively avoiding the cracking of the cylindrical hollow brick caused by thermal stress concentration.
The first fan-shaped hollow brick 3 and the second fan-shaped hollow brick 4 are provided with M-grade second through hole groups 8 from the small-end arc surface to the large-end arc surface; m is greater than or equal to 2: the setting of the M-stage second through-hole group 8 satisfies the following condition:
a: the M-level second through hole groups 8 are respectively positioned on M reference circles, and all the reference circles take the center of the cylindrical hollow brick 1 as the center of a circle and are distributed at equal intervals;
b: each stage of second through hole group 8 comprises two semicircular through holes 9 respectively positioned at the edges of two sides and a plurality of second through holes 10 positioned between the two semicircular through holes 9; the plurality of second through holes 10 and the two semicircular through holes 9 are uniformly distributed in the circumferential direction of the reference circle as a whole;
c, sequentially increasing the number of the second through holes 10 in each level of second through hole group 8 in an arithmetic progression mode; the number difference of the second through holes 10 between every two adjacent second through hole groups 8 is 1;
summarizing the arrangement characteristics of second through holes 10 on first fan-shaped hollow brick 3 and the fan-shaped hollow brick 4 of second, combine figure 2 to know, all second through holes 10 on the fan-shaped hollow brick are whole to be a plurality of equidistant "V" font structural distribution (B locates two straight lines and constitutes the V font in the picture), whole along fan-shaped hollow brick symmetrical arrangement, there is not the hole central line to run through along the circular arc radially, avoided the fracture of first fan-shaped hollow brick 3 and the fan-shaped hollow brick 4 of second that thermal stress concentrates to cause effectively.
The first through hole 7 and the second through hole 10 have the same hole diameter.
As shown in fig. 3 and 4, the male and female snap fasteners 5 in each course of hollow brick units in this embodiment comprise a concave portion 11 and a convex portion 12; the depressed part 11 is positioned at the center of the small end arc surface of the first fan-shaped hollow brick 3 and comprises two first half blind holes 13 and a groove 14; the two first half blind holes 13 are respectively arranged on the upper surface and the lower surface of the first fan-shaped hollow brick 3, and the groove 14 is arranged between the two first half blind holes 13; the convex part 12 is positioned on the outer surface of the cylindrical hollow brick 1, corresponds to the concave part 11 and comprises two second half blind holes 15 and a convex part 16; the two second half blind holes 15 are respectively arranged on the upper surface and the lower surface of the cylindrical hollow brick 1, and the bulge is arranged between the two second half blind holes 15; the first half blind hole 13 and the second half blind hole 15 positioned at the upper end form an upper end round blind hole; the first half blind hole 13 and the second half blind hole 15 positioned at the lower end form a lower end round blind hole; the shape and the size of the groove 14 and the protrusion 16 are matched; preferably, in this embodiment, the groove 14 is an arc-shaped groove, the protrusion 16 is an arc-shaped protrusion, and the concave-convex snap fastener matched with the arc-shaped protrusion is eccentrically arranged relative to the upper circular blind hole or the lower circular blind hole, in this embodiment, the arc-shaped diameter formed by matching the arc-shaped groove and the arc-shaped protrusion in the concave-convex snap fastener is 2/3-3/4 of the diameter of the upper circular blind hole or the lower circular blind hole, and the eccentric amount of the concave-convex snap fastener relative to the upper circular blind hole or the lower circular blind hole is 1/6-1/8 of the diameter of the circular blind hole
In order to ensure that dislocation does not occur between each layer of hollow brick units, axial positioning columns 17 are also arranged between each layer of hollow brick units; one end of the axial positioning column 17 is matched with the circular blind hole at the lower end of the upper layer hollow brick unit, and the other end of the axial positioning column 17 is matched with the circular blind hole at the upper end of the lower layer hollow brick unit, so that the positioning between the two layers of hollow brick units is realized.
Adopt above-mentioned unsmooth primary and secondary to detain 5 structures and axial positioning column 17's structure, solved the location problem between the upper and lower floor's hollow brick, guarantee to align from top to bottom between the through-hole in the heat accumulator structure, do not shift, each layer hollow brick unit dislocation and the problem that causes the through-hole to block up when can effectively preventing to ventilate to it is compact, the location is accurate, the maintenance is convenient, the structure is firm to have ensured overall structure.
In addition, in the embodiment, the ratio of the center distance between two adjacent first through holes 7 to the aperture of the first through hole 7 is 1.4-1.6; the ratio of the center distance of two adjacent second through holes 10 to the aperture diameter of the second through holes 10 is 1.4-1.6.
Comparative test
In order to embody the particularity of the arrangement modes of the first through holes on the cylindrical hollow brick and the arrangement modes of the first through holes on the first fan-shaped hollow brick and the second fan-shaped hollow brick in the embodiment and the beneficial effect of avoiding cracking, the embodiment is used for carrying out a corresponding comparison test, another heat storage brick unit different from the embodiment is adopted, the heat storage brick unit is of a complete cylindrical structure (not spliced), certain tensile stress concentration exists on two sides of three circles of through holes on the outer side of the heat storage brick unit, the directions of cracks on two sides of the through holes are completely consistent, all the heat storage brick units point to the center of a refractory brick, through cracks are easy to generate at the connecting line position, and the cracks are expanded in subsequent repeated work, so that the refractory brick is cracked finally, as shown in fig. 5. The use of the hollow brick units of this embodiment advantageously avoids cracking, as shown in figure 6.
The above description of the embodiments and the accompanying drawings represent preferred embodiments of the present invention, and those skilled in the art will appreciate that various additions, modifications and substitutions are possible, in accordance with different design requirements and design parameters, without departing from the scope of the present invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides a hollow brick heat accumulator structure which characterized in that: comprises a plurality of layers of hollow brick units;
each layer of hollow brick unit comprises a cylindrical hollow brick and an annular hollow brick;
the cylindrical hollow brick is placed in the middle; the annular hollow brick is coaxially arranged outside the cylindrical hollow brick, and the excircle surface of the cylindrical hollow brick is contacted with the inner ring surface of the annular hollow brick;
the annular hollow brick is formed by splicing a plurality of first fan-shaped hollow bricks and a plurality of second fan-shaped hollow bricks which are same in shape, size and quantity at intervals;
the small end arc surface of each first fan-shaped hollow brick and the cylindrical hollow brick are positioned through concave-convex snap fasteners;
the cylindrical hollow brick is provided with an N-level first through hole group from the center to the edge, wherein: the first-stage through hole group is a first through hole arranged in the center of the cylindrical hollow brick;
the 2 nd to N th level first through hole groups meet the following conditions:
A. the 2 nd to N th-level first through holes are respectively positioned on N-1 reference circles, and all the reference circles take the center of the cylindrical hollow brick as the center of a circle and are distributed at equal intervals; each stage of the first through hole group comprises a plurality of first through holes;
b: the number of the first through holes in each level of through hole group is sequentially increased in an arithmetic progression mode; the number difference of the first through holes between every two adjacent stages of the first through hole groups is 6;
c: establishing a coordinate system X0Y by taking the center of the cylindrical hollow brick as the origin of coordinates; the connecting line between the center of the first through hole closest to the Y axis in the 2 nd to N-th grade through hole groups and the origin of coordinates is marked as L2To LN，L2The included angle between the Y axis and the Y axis is 0 and L3The included angle between the Y axis and the Y axis is alpha and L2To LNThe included angle between the Y axis and the Y axis is sequentially increased by taking alpha as an equal difference;
the value range of alpha is 5-10 degrees;
m-level second through hole groups are arranged from the small-end arc surface to the large-end arc surface of each of the first fan-shaped hollow brick and the second fan-shaped hollow brick; the setting of the M-level second through hole group meets the following conditions:
a: the M-level second through hole groups are respectively positioned on M reference circles, and all the reference circles take the center of the cylindrical hollow brick as the center of a circle and are distributed at equal intervals;
b: each second through hole group comprises two semicircular through holes respectively positioned at the edges of two sides of the first fan-shaped hollow brick or the second fan-shaped hollow brick and a plurality of second through holes positioned between the two semicircular through holes; the plurality of second through holes and the two semicircular through holes are uniformly distributed in the circumferential direction of the reference circle as a whole;
the number of the second through holes in each level of second through hole group is sequentially increased in an arithmetic progression mode; the number difference of the second through holes between every two adjacent second through hole groups is 1;
the first through hole and the second through hole have the same aperture;
the ratio of the center distance between two adjacent first through holes to the aperture of the first through hole is 1.4-1.6; the ratio of the center distance between two adjacent second through holes to the aperture of the second through hole is 1.4-1.6.
2. A hollow brick heat accumulator structure according to claim 1, wherein: the concave-convex snap fastener comprises a concave part and a convex part; the concave part is positioned at the center of the small-end arc surface of the first fan-shaped hollow brick and comprises two first half blind holes and a groove; the two first half blind holes are respectively arranged on the upper surface and the lower surface of the first fan-shaped hollow brick, and the groove is arranged between the two first half blind holes;
the convex part is positioned on the outer surface of the cylindrical hollow brick, corresponds to the concave part and comprises two second semi-blind holes and a convex part; the two second half-blind holes are respectively arranged on the upper surface and the lower surface of the cylindrical hollow brick, and the bulge is arranged between the two second half-blind holes;
the first half blind hole and the second half blind hole positioned at the upper end form an upper end round blind hole; the first half blind hole and the second half blind hole positioned at the lower end form a lower end round blind hole;
the shape and the size of the groove and the bulge are matched.
3. A hollow brick heat accumulator structure according to claim 2, wherein: an axial positioning column is also arranged between every two adjacent layers of hollow brick units; one end of the axial positioning column is matched with the circular blind hole at the lower end of the upper layer hollow brick unit, and the other end of the axial positioning column is matched with the circular blind hole at the upper end of the lower layer hollow brick unit, so that positioning between the two layers of hollow brick units is realized.
4. A hollow brick heat accumulator structure according to claim 3, wherein: the recess is the arc recess, the arch is the arc arch, and unsmooth snap fastener behind arc recess and the protruding cooperation of arc is for the circular blind hole of upper end or the circular blind hole eccentric settings of lower extreme.
5. A hollow brick heat accumulator structure according to claim 4, wherein: the arc diameter of the concave-convex snap fastener is 2/3-3/4 of the diameter of the upper end round blind hole or the lower end round blind hole, and the eccentric amount of the concave-convex snap fastener relative to the upper end round blind hole or the lower end round blind hole is 1/6-1/8 of the diameter of the round blind hole.
6. A hollow brick heat accumulator structure according to claim 5, wherein: the cylindrical hollow brick, the first fan-shaped hollow brick and the second fan-shaped hollow brick are made of zirconia or alumina ceramics, and the purity is not lower than 90%.
7. A storage heater incorporating a heat storage body structure as claimed in any one of claims 1 to 6.
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| CN114485243B (en) * | 2021-12-28 | 2024-04-16 | 北京航天益森风洞工程技术有限公司 | Heat accumulator for alumina ceramic hollow brick heat accumulating heater and preparation method thereof |
| CN114199499B (en) * | 2022-02-16 | 2022-04-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | Heat storage element for large-flow high-temperature high-pressure high-speed gas environment |
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| CN108759093A (en) * | 2018-03-08 | 2018-11-06 | 西北工业大学 | A kind of hollow brick storage heater |
| CN210464155U (en) * | 2019-07-01 | 2020-05-05 | 福建俊杰新材料科技股份有限公司 | Combined honeycomb ceramic |
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| FR740670A (en) * | 1932-02-01 | 1933-01-30 | C Otto & Co Dr | Hollow brick for heat accumulators |
| EP0439704A1 (en) * | 1990-02-01 | 1991-08-07 | MegaCeram GmbH | Heat storage brick |
| JP2010132845A (en) * | 2008-12-08 | 2010-06-17 | Nitto Sangyo Kk | Hybrid heat storage agent, heat storage material using the same, and heat retention and storage system utilizing the same |
| CN203177465U (en) * | 2013-01-29 | 2013-09-04 | 中国航天空气动力技术研究院 | Electric preheating high-temperature high-pressure heat storing air heating device |
| CN205537264U (en) * | 2016-02-01 | 2016-08-31 | 浙江赛亚环保科技有限公司 | Modular ceramic honey comb heat accumulator |
| CN206235225U (en) * | 2016-12-02 | 2017-06-09 | 福建俊杰新材料科技股份有限公司 | A kind of combined type honeycomb regenerator ceramics |
| CN108595746A (en) * | 2018-03-08 | 2018-09-28 | 西北工业大学 | A kind of master-plan appraisal procedure of hollow brick storage heater |
| CN108759093A (en) * | 2018-03-08 | 2018-11-06 | 西北工业大学 | A kind of hollow brick storage heater |
| CN210464155U (en) * | 2019-07-01 | 2020-05-05 | 福建俊杰新材料科技股份有限公司 | Combined honeycomb ceramic |
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