High-voltage solid electric heat storage brick body structure

Abstract

The utility model discloses a high-voltage solid electric heat storage brick body structure which comprises a bottom insulation and heat preservation layer, a heat preservation cover is arranged at the upper end of the bottom insulation and heat preservation layer, and three groups of single-phase brick bodies are arranged at the upper end of the bottom insulation and heat preservation layer and inside the heat preservation cover. The three groups of single-phase brick bodies are respectively a phase A, a phase B and a phase C, a wind-shield wall is arranged between the bottom insulation heat preservation layer and the heat preservation cover and on one side of the single-phase brick body, the bottom insulation heat preservation layer is adopted at the bottom of the brick body, and heat preservation spaces are reserved between the periphery and the top of the brick body and the heat preservation layer so as to solve the problem of insulation of the brick body to the ground; the three groups of single-phase brick bodies are arranged in parallel, and a certain distance is reserved between the single-phase brick bodies, so that the problem of insulation between the single-phase brick bodies is solved; by designing the structure of the single-phase brick body, the problem of insulation between layers in the single-phase brick body is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid heat storage, in particular to a high-voltage solid electric heat storage brick structure. Background Art

[0002] High-voltage solid electric thermal storage equipment refers to solid electric thermal storage equipment with an input voltage of 10kV and above (such as 10kV, 35kV, 66kV, etc.). It is a high-voltage solid electric thermal storage equipment that uses carbon bricks as thermal storage materials. This equipment mainly converts electrical energy into thermal energy through electric heating elements to heat the solid thermal storage material. During the thermal storage process, the current passes through the heating element, generating Joule heat, which increases the temperature of the thermal storage material, thereby storing the electrical energy in the form of thermal energy in the thermal storage material. During the heat release process, the heat in the thermal storage material is transferred to the heat medium through a heat exchanger, and then the heat is supplied to where it is needed, such as heating, industrial heat, etc. Due to the electrical conductivity and extremely easy oxidation characteristics of carbon bricks, the difficulty in designing high-voltage solid storage equipment using carbon bricks as thermal storage materials lies in solving the insulation problems of the bricks to the ground, between single-phase bricks (i.e., between phases), and between layers within single-phase bricks. Utility Model Content

[0003] The purpose of the present utility model is to provide a high-voltage solid electric heat storage brick structure to solve the problem of insulation between the brick and the ground, between single-phase bricks (i.e., between phases), and between layers within the single-phase bricks, which is difficult to design with carbon bricks as heat storage materials due to the electrical conductivity and extremely easy oxidation characteristics of carbon bricks as mentioned in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a high-voltage solid electric thermal storage brick structure, comprising a bottom insulating thermal insulation layer, a thermal insulation cover provided at the upper end of the bottom insulating thermal insulation layer, a single-phase brick body provided at the upper end of the bottom insulating thermal insulation layer and inside the thermal insulation cover, the single-phase brick body being provided in three groups, namely, phase A, phase B, and phase C, and a windbreak wall provided between the bottom insulating thermal insulation layer and the thermal insulation cover and on one side of the single-phase brick body;

[0005] The single-phase brick body includes a bottom flat layer, a porous layer is provided on the upper surface of the bottom flat layer, an insulating tube is provided between the porous layers, a heating wire is provided inside the insulating tube, an insulating layer is provided on the upper surface of the porous layer and the insulating tube, the porous layer and the insulating layer are stacked in sequence, and a top flat layer is provided at the uppermost end of the single-phase brick body;

[0006] Terminal blocks are provided on the front and rear sides of the insulating layer, the heating wire is electrically connected to the terminal block, a terminal post is provided at the upper right corner of the single-phase brick body, the terminal post is electrically connected to the terminal block, a star point is provided between the lower right corner of the single-phase brick body and the terminal block, and the star point is electrically connected to the terminal block.

[0007] Preferably, an equipment air inlet is provided on the bottom insulation layer and on one side of the windshield wall, the terminal and the star junction are arranged on the side of the windshield wall close to the equipment air inlet, and an equipment air outlet is provided on the insulation cover and on the other side of the windshield wall.

[0008] Preferably, the front and rear sides of the insulating layer extend outwardly of the hole layer and are provided with a storage edge, and the wiring board is arranged on the storage edge.

[0009] Preferably, the outer end of the terminal passes through the heat-insulating cover and extends to the outside of the heat-insulating cover.

[0010] Preferably, a heat-insulating space is provided between the single-phase brick body and the heat-insulating cover.

[0011] Compared with the existing technology, the beneficial effects of the present invention are: the insulation of the brick body to the ground is solved by adopting a bottom insulation layer at the bottom of the brick body and leaving insulation space between the surrounding and top insulation layers; three groups of single-phase bricks are arranged in parallel, and a certain distance is left between the single-phase bricks to solve the insulation problem between the single-phase bricks; and the insulation problem between the internal layers of the single-phase brick body is solved by designing the single-phase brick structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an axonometric cross-sectional view of the main structure of the utility model;

[0013] Figure 2 This is a main cross-sectional view of the main structure of the utility model;

[0014] Figure 3 This is a left side sectional view of the main structure of the utility model;

[0015] Figure 4 This is a top sectional view of the main structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the main structure of a single-phase brick body in Example 1 of the present utility model;

[0017] Figure 6 This is a schematic front view of the main structure of the single-phase brick body in Example 2 of the present utility model.

[0018] In the figure: 1- bottom insulation layer, 2- insulation cover, 3- single-phase brick body, 301- bottom flat layer, 302- hole layer, 303- insulation tube, 304- heating wire, 305- insulation layer, 306- top flat layer, 4- windbreak wall, 5- terminal block, 6- terminal post, 7- star junction, 8- equipment air inlet, 9- equipment air outlet, 10- storage edge, 11- insulation space, 12- middle flat layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1

[0021] See also Figure 1-6 The utility model provides a high-voltage solid electric heat storage brick structure, including a bottom insulating and thermal insulation layer 1, a thermal insulation cover 2 is provided on the upper end of the bottom insulating and thermal insulation layer 1, a single-phase brick body 3 is provided on the upper end of the bottom insulating and thermal insulation layer 1 and inside the thermal insulation cover 2, the number of the single-phase brick bodies 3 is three groups, and the three groups of single-phase brick bodies 3 are respectively A phase, B phase, and C phase, and a windbreak wall 4 is provided between the bottom insulating and thermal insulation layer 1 and the thermal insulation cover 2 and on one side of the single-phase brick body 3;

[0022] The single-phase brick body 3 includes a bottom flat layer 301, a porous layer 302 is provided on the upper surface of the bottom flat layer 301, an insulating tube 303 is provided between the porous layers 302, a heating wire 304 is provided inside the insulating tube 303, an insulating layer 305 is provided on the upper surface of the porous layer 302 and the insulating tube 303, the porous layer 302 and the insulating layer 305 are stacked in sequence, and a top flat layer 306 is provided at the uppermost end of the single-phase brick body 3;

[0023] A terminal block 5 is provided on the front and rear sides of the insulating layer 305, and the heating wire 304 is electrically connected to the terminal block 5. A terminal post 6 is provided at the upper right corner of the single-phase brick body 3, and the terminal post 6 is electrically connected to the terminal block 5. A star point 7 is provided between the lower right corner of the single-phase brick body 3 and the terminal block 5, and the star point 7 is electrically connected to the terminal block 5.

[0024] When in use, by setting the bottom insulating and heat-insulating layer 1, while providing thermal insulation effect for the lower end of the single-phase brick body 3, it provides insulation capacity for the lower end of the single-phase brick body 3, and a heat-insulating cover 2 is set at the upper end of the bottom insulating and heat-insulating layer 1, and a heat-insulating space is formed by the heat-insulating cover 2 and the bottom insulating and heat-insulating layer 1. The bottom of the single-phase brick body 3 adopts the bottom insulating and heat-insulating layer 1, and a certain distance is left between the four sides and the top and the heat-insulating cover 2 to solve the insulation of the single-phase brick body 3 to the ground, and the single-phase brick body 3 is insulated. The three single-phase brick bodies 3 are arranged in parallel, and a certain distance is left between the single-phase brick bodies 3 to solve the insulation problem between the single-phase brick bodies 3. A windbreak wall 4 is set on one side of the single-phase brick body 3, and the external air enters the interior of the heat-insulating cover 2 through one side of the windbreak wall 4, and circulates through the single-phase brick body 3, and is output to the outside of the heat-insulating cover 2 through the other side of the windbreak wall 4. The heat exchanger and the circulating fan are connected to form a closed-loop circulation system through the air duct outside the solid storage body.

[0025] The bottom and top layers 301 and 306 are made of insulating bricks such as magnesia bricks or high-alumina bricks. The thickness of the edge bricks of this layer is 4mm thinner than that of the other bricks in the middle. The upper and lower surfaces are covered with 2mm thick ceramic fiber paper or other sealing materials. 2mm thick ceramic fiber paper or other sealing materials are sandwiched between the joints of all bricks in this layer to ensure the sealing of the lower, upper and surrounding parts of the brick body and prevent the carbon bricks in the brick body from being oxidized under high temperature conditions.

[0026] The hole layer 302 is made of insulating bricks such as corundum tubes or high-aluminum tubes, carbon bricks are placed between the insulating tubes 303, and the holes of the insulating tubes 303 are filled with heating wires 304. The outer edges of the insulating tubes 303 on both sides and the ends along the brick holes are made of insulating bricks such as magnesium bricks or high-aluminum bricks. Sealing materials such as 2mm ceramic fiber paper are sandwiched between the insulating bricks and the insulating tubes 303, and between the brick joints of the insulating bricks to ensure sealing on all sides and insulation along the brick holes. Since the pressure difference between the horizontal brick holes is low, the thickness of the insulating tubes 303 can meet the lateral insulation problem.

[0027] The insulating layer 305 is made of insulating bricks such as magnesia bricks or high-alumina bricks. The thickness of the edge bricks of this layer is 4mm thinner than that of other bricks in the middle. The upper and lower surfaces are covered with 2mm thick ceramic fiber paper or other sealing materials. 2mm thick ceramic fiber paper or other sealing materials are added between the brick seams of the edge bricks to ensure the sealing on all sides and prevent the carbon bricks in the brick body from being oxidized under high temperature conditions. The insulating layer 305 is added between two vertically adjacent brick holes to meet the insulation requirements under the condition of maximum pressure difference between adjacent brick holes.

[0028] The combination of the top flat layer 306, the bottom flat layer 301, the hole layer 302, and the insulating layer 305 forms a brick structure that is sealed and insulated on all sides, and the insulation requirements between the vertical heating wires are met. That is, the interlayer insulation is achieved by the wall thickness of the two insulating tubes 303 between the two holes and the thickness of the one insulating layer 305. The pressure difference between the position of the terminal 6 (i.e., the right end of the upper first layer) and the position of the star point 7 (the right end of the lower first layer) is the largest. The insulation requirements can be met by the wall thickness of each layer of insulating tubes 303 and the total thickness of each layer of insulating layer 305.

[0029] The basic arrangement of the heating wire 304 in the hole of the high-voltage solid storage device is as follows: Figure 5 As shown, the electric heater 304 is connected in parallel and in series and then electrically connected to the next layer of brick holes through the terminal board 5, and so on, eventually forming two ends, the bottom is the star connection point 7 and is electrically connected to the electric heating wire star connection board; the upper part is the terminal 6, which is connected to the high-voltage cable. From the upper brick hole to the lower brick hole, the electric potential at the right end of the upper first layer of brick holes is the highest, and gradually decreases from right to left along the horizontal brick holes, and then gradually decreases from left to right in the second layer (that is, odd-numbered layers from right to left, even-numbered layers from left to right). The maximum pressure difference point between two adjacent layers is at the end (left or right). Figure 5 As shown in the figure, the maximum voltage difference point between the first and second layers is at the right end, and the maximum voltage difference point between the second and third layers is at the left end, and so on, until the potential finally drops to 0, that is, the position of the star point 7. The star point 7 is connected to the star board, and the three phases form a star connection circuit.

[0030] An equipment air inlet 8 is provided on the bottom insulating layer 1 and on one side of the windshield wall 4. The terminal 6 and the star junction 7 are arranged on the side of the windshield wall 4 close to the equipment air inlet 8. An equipment air outlet 9 is provided on the thermal insulation cover 2 and on the other side of the windshield wall 4. External air enters one side of the windshield wall 4 through the equipment air inlet 8, and flows through the single-phase brick body 3 and is input to the other side of the windshield wall 4. The heated air is output to the outside through the equipment air outlet 9. The heat exchanger and the circulating fan are connected to form a closed-loop circulation system through the air duct outside the solid storage body.

[0031] The front and rear sides of the insulating layer 305 extend to the outside of the hole layer 302 and are provided with a storage edge 10. The terminal block 5 is arranged on the storage edge 10. Along the direction of the brick hole, the length of the hole layer 302 is 50 mm smaller than the top flat layer 306, the bottom flat layer 301, and the two ends of the insulating layer 305, forming a storage edge 10 structure for placing the terminal block 5.

[0032] The outer end of the terminal 6 passes through the heat-insulating cover 2 and extends to the outside of the heat-insulating cover 2 . The terminal 6 extends to the outside of the heat-insulating cover 2 to be connected to an external high-voltage cable.

[0033] An insulation space 11 is provided between the single-phase brick body 3 and the insulation cover 2. The bottom of the single-phase brick body 3 adopts a bottom insulation layer 1, and insulation spaces 11 are left around and between the top and the insulation cover 2 to solve the insulation of the single-phase brick body 3 to the ground.

[0034] Example 2

[0035] See also Figure 6 This embodiment is different from the first embodiment in that the odd-numbered insulating layers 305 in the single-phase brick body 3 are replaced with an intermediate tile layer 12 .

[0036] The arrangement of the top tiling layer 306, the bottom tiling layer 301, the hole layer 302, and the insulating layer 305 and the surrounding sealing form are consistent with those in Example 1;

[0037] The middle flat layer 12 of this embodiment is composed of insulating bricks such as carbon bricks and magnesium bricks or high-alumina bricks. That is, the edges are made of insulating bricks, and the rest of the area is made of carbon bricks. The thickness of the edge insulating bricks is 4mm thinner than that of the middle carbon bricks. The upper and lower surfaces are covered with 2mm thick ceramic fiber paper or other sealing materials. The insulating bricks are sandwiched with 2mm thick sealing materials to ensure insulation and sealing on all sides.

[0038] The characteristic of this scheme is that an intermediate flat layer 12 is added for insulation every two layers of porous layers 302, and the insulation between vertically adjacent layers is achieved by the wall thickness of the insulating tube. The potential at the upper terminal 6 position is the highest, and the potential at the bottom star point 7 position is the lowest. The potential difference between the terminal 6 position and the star point 7 position is the largest (i.e., pressure difference). The insulation here is met by each layer of insulating tube 305 and the intermediate flat layer 12 added every two layers. The advantage is that when carbon bricks are used as heat storage materials, the amount of carbon bricks is increased under the same brick volume, that is, under the same conditions, the brick volume of the solid storage equipment can be reduced.

[0039] In practical applications, the selection of the above embodiments should be determined based on the input voltage of the solid storage equipment and the pressure difference between layers.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage solid electric heat storage brick structure, characterized by: The invention comprises a bottom insulating and heat-insulating layer (1), a heat-insulating cover (2) is provided at the upper end of the bottom insulating and heat-insulating layer (1), a single-phase brick body (3) is provided at the upper end of the bottom insulating and heat-insulating layer (1) and inside the heat-insulating cover (2), the number of the single-phase brick bodies (3) being three groups, and the three groups of the single-phase brick bodies (3) are respectively phase A, phase B, and phase C, and a windbreak wall (4) is provided between the bottom insulating and heat-insulating layer (1) and the heat-insulating cover (2) and on one side of the single-phase brick body (3); The single-phase brick body (3) comprises a bottom flat layer (301), a hole layer (302) is provided on the upper surface of the bottom flat layer (301), an insulating tube (303) is provided between the hole layers (302), a heating wire (304) is provided inside the insulating tube (303), an insulating layer (305) is provided on the upper surface of the hole layer (302) and the insulating tube (303), the hole layer (302) and the insulating layer (305) are stacked in sequence, and a top flat layer (306) is provided at the uppermost end of the single-phase brick body (3); Terminal blocks (5) are provided on the front and rear sides of the insulating layer (305), the heating wire (304) is electrically connected to the terminal block (5), a terminal post (6) is provided at the upper right corner of the single-phase brick body (3), the terminal post (6) is electrically connected to the terminal block (5), a star point (7) is provided between the lower right corner of the single-phase brick body (3) and the terminal block (5), and the star point (7) is electrically connected to the terminal block (5).

2. The high-voltage solid electric thermal storage brick structure according to claim 1, characterized in that: An equipment air inlet (8) is provided on the bottom insulating layer (1) and on one side of the windshield wall (4); the terminal (6) and the star point (7) are arranged on one side of the windshield wall (4) close to the equipment air inlet (8); and an equipment air outlet (9) is provided on the thermal insulation cover (2) and on the other side of the windshield wall (4).

3. The high-voltage solid electric thermal storage brick structure according to claim 1, characterized in that: The front and rear sides of the insulating layer (305) extend outward from the hole layer (302) and are provided with a receiving edge (10), and the wiring board (5) is arranged on the receiving edge (10).

4. The high-voltage solid electric thermal storage brick structure according to claim 1, characterized in that: The outer end of the terminal (6) passes through the heat-insulating cover (2) and extends to the outside of the heat-insulating cover (2).

5. The high-voltage solid electric thermal storage brick structure according to claim 1, characterized in that: A heat-insulating space (11) is provided between the single-phase brick body (3) and the heat-insulating cover (2).

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