Hot and cold storage under-pressure heat storage spherical tank and heat storage system thereof

Abstract

The invention provides a hot and cold storage under-pressure heat storage spherical tank and a heat storage system thereof.The hot and cold storage spherical tank comprises a tank body and a supporting frame set, the tank body internally comprises a cold bin, a hot bin, an upper water inlet pipe and a lower water inlet pipe, and the hot and cold storage assembly is used for storing cold and hot water in one tank body at the same time and comprises a cold and hot partition plate set, a water outlet inner pipe and a water outlet outer pipe; the cold and hot partition plate set comprises multiple sets of buoyancy rings, annular grooves, positioning sliding rods, annular plates, positioning sliding holes and limiting rings, the water outlet inner pipe is embedded into the limiting rings, a second sealing bearing is arranged between the water outlet inner pipe and the water outlet outer pipe, a first sealing bearing is arranged between the water outlet inner pipe and the tank body, and the cold and hot partition plate set is fixedly connected with the water outlet inner pipe through the limiting rings. The multiple sets of buoyancy rings are sequentially arranged in a sleeved mode from the centers to the outside, and every two adjacent sets of buoyancy rings are slidably connected through the ring grooves and the ring plates. By means of the design of the heat storage spherical tank, cold water and hot water can be stored in the same tank body at the same time, and simultaneous storage of water at different temperatures is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat storage spherical tanks, and more specifically, to a pressurized heat storage spherical tank for combined cold and heat storage and its heat storage system. Background Art

[0002] Traditional heat storage systems usually face several key challenges: low energy conversion efficiency, limited storage capacity, and complex energy consumption management. For example, devices such as hot water tanks or steam boilers will lose a large amount of heat during the cooling process, which not only causes energy waste but also may increase operating costs. In addition, for the changes in seasonal or intermittent energy demands, traditional systems are often difficult to respond flexibly. Especially in the case where heating and cooling demands coexist, how to balance energy supply becomes a difficult problem.

[0003] Among them, the "combined cold and heat storage spherical tank" can more precisely control the temperature distribution by introducing the design of an isolation belt, that is, forming an isolation area from high temperature to low temperature inside the heat storage medium, thereby improving the heat storage efficiency of the entire system. This design enables the storage of high-temperature and low-temperature media in the same container, effectively realizing the simultaneous storage and distribution of cold and heat resources.

[0004] In the prior art, during the use of heat storage spherical tanks, cold and hot water cannot be stored in the same tank at the same time; therefore, we make improvements and propose a pressurized heat storage spherical tank for combined cold and heat storage and its heat storage system. Summary of the Invention

[0005] The purpose of the present invention is to address the problem that in the current design of heat storage spherical tanks, cold and hot water cannot be stored in the same tank at the same time.

[0006] To achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0007] A pressurized heat storage spherical tank for combined cold and heat storage and its heat storage system to improve the above problems.

[0008] Specifically, this application is as follows:

[0009] A pressurized heat storage spherical tank for combined cold and heat storage, comprising a tank body and a support frame group. It is characterized in that the tank body includes a cold storage chamber, a heat storage chamber, and an upper and lower water inlet pipe, and further includes:

[0010] A combined cold and heat storage component for simultaneously storing cold and hot water in one tank. The combined cold and heat storage component includes a cold and heat partition plate group, an inner water outlet pipe, and an outer water outlet pipe. The cold and heat partition plate group includes multiple groups of buoyancy rings, annular grooves, positioning slide rods, annular plates, positioning slide holes, and limit rings. The inner water outlet pipe is embedded in the limit ring, a second sealing bearing is provided between the inner water outlet pipe and the outer water outlet pipe, and a first sealing bearing is provided between the inner water outlet pipe and the tank body.

[0011] As a preferred technical solution of the present application, the cold and hot partition plate group is fixedly connected to the inner water outlet pipe through a limiting ring. Multiple groups of buoyancy rings are arranged in a nested manner from the center outwards in sequence. Adjacent two groups of buoyancy rings are slidably connected through a ring groove and a ring plate. Inert gases such as helium or nitrogen are injected into the buoyancy rings, and a fixed connection is provided between the ring groove and the positioning slide rod.

[0012] As a preferred technical solution of the present application, the ring plate wraps around the outer end of the positioning slide rod through a positioning slide hole. A sliding connection is provided between the limiting ring and the outermost group of buoyancy rings through a ring groove and a ring plate. A through connection is provided between the inner water outlet pipe and the limiting ring. The inner water outlet pipe is hermetically and movably arranged on the inner surface of the equator line of the tank body through a first sealing bearing. A movable connection is provided between the inner water outlet pipe and the outer water outlet pipe through a second sealing bearing.

[0013] As a preferred technical solution of the present application, it further includes: an auxiliary sealing assembly for assisting in sealing between the limiting ring and the inner wall of the tank. The auxiliary sealing assembly includes an inner circular groove embedded in the inner wall of the tank, an upper oil pressure chamber and a lower oil pressure chamber embedded in the limiting ring. An upper sealing plate slides in the upper oil pressure chamber, and a lower sealing plate slides in the lower oil pressure chamber. The upper sealing plate and the lower sealing plate are in movable contact and are arranged in an annular array along the inner circumference of the limiting ring. Multiple groups of connecting oil pipes are provided in both the upper oil pressure chamber and the lower oil pressure chamber, and the upper end of each group of connecting oil pipes is connected to an oil pump.

[0014] As a preferred technical solution of the present application, the inner circular groove is fixed on the central inner wall of the tank body, and the number of the inner circular grooves is set to two groups. The two groups of inner circular grooves are respectively in movable connection with two groups of upper sealing plates and lower sealing plates.

[0015] As a preferred technical solution of the present application, the upper sealing plate is slidably connected in the upper oil pressure chamber, and the lower sealing plate is slidably connected in the lower oil pressure chamber. The upper sealing plate and the lower sealing plate are in contact with each other in the fully extended state, and the upper sealing plate and the lower sealing plate are arranged in a group in an annular array within the limiting ring.

[0016] As a preferred technical solution of the present application, the upper oil pressure chamber and the lower oil pressure chamber are arranged in an alternating annular array within the limiting ring. The widths of both the upper oil pressure chamber and the lower oil pressure chamber are greater than the widths of the upper sealing plate and the lower sealing plate. The upper oil pressure chamber and the lower oil pressure chamber are in through connection with multiple groups of connecting oil pipes, and the upper end of each group of connecting oil pipes is movably connected to an oil pump. The oil pump is fixed at the outer end of the limiting ring.

[0017] A heat storage system of a pressure-bearing heat storage spherical tank with combined cold and heat storage is characterized in that the heat storage system includes a temperature sensor and a heating belt fixed on the buoyancy ring. The heating belt wraps around the upper end or the lower end of each group of buoyancy rings simultaneously. The temperature sensor is connected to the heat storage system for signal conduction, and the heating belt is electrically connected to a heating controller.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the solution of the present application:

[0020] 1. By setting the cold and heat partition plate group, according to the different volumes of the lower end and the upper end, it is changed whether to bend upward or downward, and through the temperature sensors located outside each group of buoyancy plates, it is interconnected with the heat storage system. When a temperature gradient appears, for the temperature layer with a large temperature difference, the heating belt of this layer is turned on through the heating controller for heating. When the temperature reaches the predetermined heat preservation value, the heating is immediately controlled to be turned off, avoiding excessive overall heating energy consumption and having an energy-saving effect;

[0021] 2. Through the stable connection of the annular groove, positioning slide bar, positioning ring hole and annular plate, it can ensure the stable movement between adjacent two groups of buoyancy rings. And between multiple groups of buoyancy rings, sealing rings are embedded at the position of the annular plate, which can well ensure the relative sealing of the upper and lower bins. At the same time, according to the movement between the buoyancy rings, it is convenient for heating and measuring the energy storage temperature;

[0022] 3. Through the setting of the auxiliary sealing component, when the cold and heat partition plate group is fixed, the corresponding upper sealing plate and lower sealing plate can be pushed out through the oil pump and positioned in the inner circular groove on the inner side of the tank body, which is convenient for ensuring the stability of the seal;

[0023] 4. Through the arrangement of the heat storage system, cold water and hot water are respectively injected into the upper and lower bin bodies. Through the action of the buoyancy rings themselves sensing the buoyancy, and under the gravity of the upper end bin body, a stepped shape is generated between multiple groups of buoyancy rings. Through the temperature sensors located on the buoyancy rings, the temperature changes of each layer of water body are sensed in real time. When the temperature loss is large, by controlling the corresponding heating controller to turn on the heating belt of the corresponding gradient zone, the water body of this gradient is heated, which is convenient for keeping the water temperature in different bin bodies stable, slowing down the temperature loss, and at the same time being able to monitor the temperature of each gradient layer, reducing the influence of excessive temperature loss caused by the simultaneous storage of cold and hot water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 16 is a schematic diagram of the overall structure of a pressure-bearing heat storage spherical tank and its heat storage system for combined cold and heat storage provided by the present application;

[0025] Figure 2 FIG. 20 is a schematic diagram of the internal sectional structure of a pressure-bearing heat storage spherical tank and its heat storage system for combined cold and heat storage provided by the present application;

[0026] Figure 3 FIG. 24 is a front view of the side section of a pressure-bearing heat storage spherical tank and its heat storage system for combined cold and heat storage provided by the present application;

[0027] Figure 4 FIG. 28 is a schematic diagram of a pressure-bearing heat storage spherical tank and its heat storage system for combined cold and heat storage provided by the present application Figure 2 and an enlarged structure diagram of A therein;

[0028] Figure 5For a pressure - retaining heat storage spherical tank with combined cold and heat storage and its heat storage system provided by this application Figure 3 Schematic enlarged structure diagram of B in

[0029] Figure 6 Schematic enlarged structure diagram of the cold - heat partition plate group of a pressure - retaining heat storage spherical tank with combined cold and heat storage and its heat storage system provided by this application

[0030] Figure 7 For a pressure - retaining heat storage spherical tank with combined cold and heat storage and its heat storage system provided by this application Figure 6 Schematic enlarged structure diagram of the left - hand side cross - section at the end

[0031] Figure 8 Schematic explosion structure diagram of the limit ring, upper sealing plate and lower sealing plate of a pressure - retaining heat storage spherical tank with combined cold and heat storage and its heat storage system provided by this application

[0032] Figure 9 For a pressure - retaining heat storage spherical tank with combined cold and heat storage and its heat storage system provided by this application Figure 3 Schematic enlarged structure diagram of C in

[0033] Labels in the figure:

[0034] 1. Tank body; 2. Support frame group; 3. Cold - heat partition plate group; 4. Buoyancy ring; 5. Ring groove; 6. Positioning slide bar; 7. Ring plate; 8. Positioning slide hole; 9. Limit ring; 10. First sealing bearing; 11. Inner water outlet pipe; 12. Outer water outlet pipe; 13. Second sealing bearing; 23. Inner circular groove; 24. Upper sealing plate; 25. Lower sealing plate; 26. Upper oil pressure chamber; 27. Lower oil pressure chamber; 28. Oil pump; 29. Connecting oil pipe. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention.

[0036] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments and the features and technical solutions in the embodiments of the present invention can be combined with each other.

[0037] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] As Figures 1-9 shown, this embodiment provides a pressure-bearing heat storage spherical tank and its heat storage system for combined cold and heat storage, including a tank body 1 and a support frame group 2. The tank body 1 includes a cold storage chamber, a heat storage chamber, and upper and lower water inlet pipes, and further includes:

[0039] A combined cold and heat storage component for storing cold and hot water simultaneously in a tank body 1. The combined cold and heat storage component includes a cold and heat partition plate group 3, an inner water outlet pipe 11, and an outer water outlet pipe 12. The cold and heat partition plate group 3 includes multiple groups of buoyancy rings 4, annular grooves 5, positioning slide rods 6, annular plates 7, positioning slide holes 8, and limiting rings 9. The inner water outlet pipe 11 is embedded in the limiting ring 9. A second sealing bearing 13 is provided between the inner water outlet pipe 11 and the outer water outlet pipe 12, and a first sealing bearing 10 is provided between the inner water outlet pipe 11 and the tank body 1.

[0040] The cold and heat partition plate group 3 is fixedly connected to the inner water outlet pipe 11 through the limiting ring 9. Multiple groups of buoyancy rings 4 are arranged in a nested manner outward from the center. Adjacent two groups of buoyancy rings 4 are slidably connected through the annular grooves 5 and the annular plates 7. Inert gases such as helium or nitrogen are injected into the buoyancy rings 4. A fixed connection is provided between the annular grooves 5 and the positioning slide rods 6.

[0041] The annular plate 7 wraps around the outer end of the positioning slide rod 6 through the positioning slide hole 8. The limiting ring 9 and the outermost group of buoyancy rings 4 are slidably connected through the annular grooves 5 and the annular plates 7. The inner water outlet pipe 11 and the limiting ring 9 are connected through penetration. The inner water outlet pipe 11 is hermetically movable on the inner surface of the equator line of the tank body 1 through the first sealing bearing 10. The inner water outlet pipe 11 and the outer water outlet pipe 12 are movably connected through the second sealing bearing 13.

[0042] During use, different volumes of water are injected into the cold storage chamber and the heat storage chamber respectively. The middle cold and heat partition plate group 3 changes whether to bend upward or downward according to the different volumes of the lower end and the upper end, and is interconnected with the heat storage system through the temperature sensors located outside each group of buoyancy plates. When a temperature gradient appears in the temperature layer, for the temperature layer with a large temperature difference, the heating belt of this layer is turned on through the heating controller. When the temperature reaches the predetermined heat preservation value, the heating is immediately controlled to be turned off, avoiding excessive overall heating energy consumption, which is not conducive to the concept of environmental protection and energy conservation.

[0043] Moreover, by connecting the inner water outlet pipe 11 and the limiting ring 9 through the first sealing bearing 10, it can ensure a sealed state between the water in the tank body 1 and the tank body 1, and by connecting and controlling the inner water outlet pipe 11 and the outer water outlet pipe 12 through the second sealing bearing 13, it can ensure a stable water supply from the cold storage chamber or the heat storage chamber to the outside.

[0044] Through the stable connection of the annular groove 5, the positioning slide bar 6, the hole of the positioning ring 22, and the annular plate 7, the stable movement between two adjacent groups of buoyancy rings 4 can be ensured. A sealing ring is embedded at the position of the annular plate 7 between multiple groups of buoyancy rings 4, which can well ensure the relative sealing of the upper and lower compartments. At the same time, according to the movement between the buoyancy rings 4, it is convenient for heating and measuring the energy storage temperature.

[0045] The buoyancy ring 4 has a certain thickness, which can well ensure the relative temperature balance between the upper and lower compartments through the inert gas inside, and play a good heat insulation effect.

[0046] It further includes: an auxiliary sealing assembly for assisting in sealing between the limiting ring 9 and the inner wall of the tank body 1. The auxiliary sealing assembly includes an inner circular groove 23 embedded in the inner wall of the tank body 1, an upper oil pressure chamber 26 and a lower oil pressure chamber 27 embedded in the limiting ring 9. An upper sealing plate 24 slides in the upper oil pressure chamber 26, and a lower sealing plate 25 slides in the lower oil pressure chamber 27. The upper sealing plate 24 and the lower sealing plate 25 are in active contact and are arranged in an annular array along the inside of the limiting ring 9. Multiple groups of connecting oil pipes 29 are provided in both the upper oil pressure chamber 26 and the lower oil pressure chamber 27, and the upper end of each group of connecting oil pipes 29 is connected to an oil pump 28.

[0047] The inner circular groove 23 is fixed on the central inner wall of the tank body 1, and the number of the inner circular grooves 23 is set to two groups. The two groups of inner circular grooves 23 are respectively in active connection with two groups of upper sealing plates 24 and lower sealing plates 25. The upper sealing plate 24 is slidably connected in the upper oil pressure chamber 26, and the lower sealing plate 25 is slidably connected in the lower oil pressure chamber 27. The upper sealing plate 24 and the lower sealing plate 25 are in contact with each other in the fully extended state. The upper sealing plate 24 and the lower sealing plate 25 are arranged in a group in an annular pattern inside the limiting ring 9. The upper oil pressure chamber 26 and the lower oil pressure chamber 27 are arranged in an alternating annular array inside the limiting ring 9. The widths of the upper oil pressure chamber 26 and the lower oil pressure chamber 27 are both greater than the widths of the upper sealing plate 24 and the lower sealing plate 25. The upper oil pressure chamber 26 and the lower oil pressure chamber 27 are connected through multiple groups of connecting oil pipes 29. The upper end of each group of connecting oil pipes 29 is in active connection with the oil pump 28, and the oil pump 28 is fixed at the outer end of the limiting ring 9.

[0048] When the cold and hot partition plate group 3 is located at the equator line position of the tank body 1, hydraulic oil is injected into the connecting oil pipes 29 through the oil pump 28. The hydraulic oil pushes the upper sealing plate 24 and the lower sealing plate 25 in the upper oil pressure chamber 26 and the lower oil pressure chamber 27 to push outwards. During the pushing process, the outer end parts of the upper sealing plate 24 and the lower sealing plate 25 are in a state of being closely attached to each other, and correspondingly inserted into the inner circular groove 23 inside the tank body 1 to achieve stable sealing and prevent the mixing of the upper and lower compartments.

[0049] A heat storage system for a pressure-bearing heat storage spherical tank with combined cold and heat storage. The heat storage system includes a temperature sensor and a heating tape fixed on the buoyancy ring 4. The heating tape is wrapped around the upper or lower end of each group of buoyancy rings 4 at the same time. The temperature sensor is connected to the heat storage system for signal conduction, and the heating tape is electrically connected to a heating controller.

[0050] Cold water and hot water are respectively injected into the upper and lower chambers. Through the action of the buoyancy ring 4 sensing its own buoyancy and under the action of the gravity of the upper chamber, a stepped shape is generated between multiple groups of buoyancy rings 4. The temperature sensor located on the buoyancy ring 4 senses the temperature change of each layer of water body in real time. When the temperature loss is large, the corresponding heating tape of the corresponding gradient zone is turned on by controlling the corresponding heating controller to heat the water body of this gradient, so as to keep the water temperature in different chambers stable, slow down the temperature loss, and at the same time, the temperature of each layer gradient can be monitored, reducing the influence of too fast temperature loss caused by the simultaneous storage of cold and hot water bodies.

[0051] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above respective embodiments, the present invention is not limited to the above specific embodiments. Therefore, any modification or equivalent replacement to the present invention; and all technical solutions and their improvements that do not depart from the spirit and scope of the invention are covered by the scope of the claims of the present invention.

Claims

1. A pressurized heat storage spherical tank for storing both cold and hot water, comprising a tank body (1) and a support frame assembly (2), characterized in that: The tank body (1) includes a cold compartment, a hot compartment and upper and lower water inlet pipes, and also includes: A hot and cold storage component is used for storing hot and cold water simultaneously in a tank body (1), the hot and cold storage component comprising a hot and cold dividing plate group (3), an inner water outlet pipe (11) and an outer water outlet pipe (12), the hot and cold dividing plate group (3) comprising a plurality of groups of buoyancy rings (4), annular grooves (5), positioning slide bars (6), annular plates (7), positioning slide holes (8) and limiting rings (9), the inner water outlet pipe (11) is embedded in the limiting ring (9), a second sealing bearing (13) is provided between the inner water outlet pipe (11) and the outer water outlet pipe (12), and a first sealing bearing (10) is provided between the inner water outlet pipe (11) and the tank body (1).

2. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 1 is characterized in that: The hot and cold dividing plate group (3) is fixedly connected to the water outlet inner pipe (11) via a limit ring (9); a plurality of groups of buoyancy rings (4) are arranged in a circle from the center outward in sequence; two adjacent groups of buoyancy rings (4) are slidably connected via an annular groove (5) and an annular plate (7); an inert gas such as helium or nitrogen is injected into the buoyancy ring (4); and the annular groove (5) is fixedly connected to a positioning slide rod (6).

3. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 2 is characterized in that: The ring plate (7) is wrapped around the outer end of the positioning slide rod (6) through the positioning slide hole (8); the limiting ring (9) and the outermost group of buoyancy rings (4) are slidably connected through the ring groove (5) and the ring plate (7); the water outlet inner tube (11) and the limiting ring (9) are connected through the ring groove (5); the water outlet inner tube (11) is sealed and movable on the inner surface of the equator of the tank body (1) through the first sealing bearing (10); and the water outlet inner tube (11) and the water outlet outer tube (12) are movably connected through the second sealing bearing (13).

4. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 3 is characterized in that: Also includes: An auxiliary sealing assembly is used to assist the sealing between the limiting ring (9) and the inner wall of the tank body (1). The auxiliary sealing assembly comprises an inner circular groove (23) embedded in the inner wall of the tank body (1) and an upper oil pressure chamber (26) and a lower oil pressure chamber (27) embedded in the limiting ring (9). An upper sealing plate (24) slides in the upper oil pressure chamber (26), and a lower sealing plate (25) slides in the lower oil pressure chamber (27). The upper sealing plate (24) and the lower sealing plate (25) are movably fitted and arranged in a circular array along the inner wall of the limiting ring (9). A plurality of groups of connecting oil pipes (29) are provided in the upper oil pressure chamber (26) and the lower oil pressure chamber (27), and an oil pump (28) is connected to the upper end of each group of connecting oil pipes (29).

5. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 4 is characterized in that: The inner circular groove (23) is fixed to the central inner wall of the tank body (1), and the number of the inner circular grooves (23) is set to two groups, and the two groups of the inner circular grooves (23) are movably connected to the two groups of the upper sealing plates (24) and the lower sealing plates (25) respectively.

6. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 5, characterized in that: The upper sealing plate (24) is slidably connected in the upper oil pressure chamber (26), and the lower sealing plate (25) is slidably connected in the lower oil pressure chamber (27). The upper sealing plate (24) and the lower sealing plate (25) are in contact with each other in a fully extended state. The upper sealing plate (24) and the lower sealing plate (25) are arranged in a ring in a group in a limit ring (9).

7. The pressurized heat storage spherical tank for storing both cold and hot water according to claim 6, characterized in that: The upper oil pressure chamber (26) and the lower oil pressure chamber (27) are arranged in a staggered annular array in the limiting ring (9); the widths of the upper oil pressure chamber (26) and the lower oil pressure chamber (27) are greater than the widths of the upper sealing plate (24) and the lower sealing plate (25); the upper oil pressure chamber (26) and the lower oil pressure chamber (27) are connected with a plurality of groups of connecting oil pipes (29); the upper end of each group of the connecting oil pipes (29) is movably connected to an oil pump (28); and the oil pump (28) is fixed to the outer end of the limiting ring (9).

8. The heat storage system of a pressurized heat storage spherical tank for storing both cold and hot water according to claim 7, characterized in that: The system is applied to the tank body (1) described in any one of claims 1 to 7, and the heat storage system includes a temperature sensor and a heating belt fixed on the buoyancy ring (4), and the heating belt is simultaneously wrapped around the upper end or the lower end of each group of buoyancy rings (4). The temperature sensor is connected to the heat storage system for signal conduction, and the heating belt is conductively connected to a heating controller.

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