Thermocline heat storage device for liquid heat storage

Abstract

The invention discloses a thermocline heat storage device for liquid heat storage, relates to the field of heat storage devices, and solves the problems that when an existing thermocline heat storage device for liquid heat storage is used, it is difficult to guarantee internal liquid circulation and thermocline position temperature stability in multiple modes, and the heat storage conveying efficiency is affected. Comprising a base, a conveying mechanism and a control mechanism, a heat storage tank is fixedly connected to the base, the control mechanism comprises a control frame and a control panel, and an upper through hole and a lower through hole are formed in the control frame. The control frame is driven to ascend and descend synchronously after the upper through hole and the lower through hole are blocked, the purpose of actively sucking liquid into the heat storage tank is achieved, meanwhile, the liquid can be directly conveyed into the heat storage tank through liquid pressure, the positions of the control frame and the control panel are adjusted in the conveying process, and the conveying efficiency is improved. Liquid separation is achieved, and liquid conveying is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of heat storage devices, and in particular to a thermocline heat storage device for liquid heat storage. Background Art

[0002] Heat storage technology is of great significance for discontinuous energy applications such as industrial waste heat and renewable energy. Compared with the traditional high-temperature and low-temperature dual-body heat storage system, the single-body heat storage system using the inclined temperature layer principle has the advantage of lower cost. In order to ensure the inlet temperature of the heat-using equipment, measures need to be taken to suppress the mixing and natural convection of high-temperature liquid and low-temperature liquid in the heat storage system.

[0003] The invention patent with publication number CN106288903B discloses a temperature-slope heat storage device for liquid heat storage, including a variable frequency motor 1, a hot fluid inlet 2, a hot fluid inlet valve 3, a thermal insulation layer 4, a heat storage tank 5, a screw 6, a heat insulation board 7, a cold fluid outlet valve 8, a cold fluid outlet 9, a cold fluid inlet 10, a cold fluid inlet valve 11, a screw bearing 12, a heat insulation board sealing ring 13, a guide rod sealing ring 14, a guide rod 15, a reducer 16, a hot fluid outlet valve 17 and a hot fluid outlet 18. The heat insulation board 7 is driven up and down by the screw 6, thereby driving the liquid in the heat storage tank. The heat storage tank is completely separated by the insulation board and does not generate an oblique temperature layer in the heat storage tank. The liquid exchange on the upper and lower sides of the insulation board cannot flow. At this time, the heat storage tank is equivalent to a positive displacement suction pump. If the screw is not started, only the pressure of the liquid in the inlet and outlet pipes is used. At this time, the equipment cannot operate normally. The operation mode of the equipment is single. Once a power outage or motor damage occurs, the liquid in the heat storage tank cannot be transported by its own pressure, resulting in the inability of equipment that needs heating or cooling to use the liquid in the heat storage tank in time, causing equipment damage and other consequences. Summary of the invention

[0004] The object of the present invention is to provide a thermocline heat storage device for liquid heat storage that is convenient for improving the separation state of the thermocline layer and the diversity of liquid transportation methods, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermocline heat storage device for liquid heat storage, comprising a base, a conveying mechanism and a control mechanism, wherein a heat storage tank is fixedly connected to the base, the conveying mechanism is installed on the heat storage tank and is used to convey the liquid, the control mechanism comprises a control frame installed in the heat storage tank, a sliding cavity is provided in the control frame, a control board is slidably connected in the sliding cavity along the vertical direction, an upper through hole and a lower through hole are provided in the control frame, the upper through hole is located on the upper side of the control board, and the lower through hole is located on the lower side of the control board, and is used to control the control board to rise and fall, so that the upper through hole and the lower through hole are blocked and then the control frame is driven to rise and fall synchronously, so as to achieve the purpose of actively sucking the liquid into the heat storage tank, and at the same time, the liquid can be directly conveyed into the heat storage tank by liquid pressure, and the positions of the control frame and the control board are adjusted during the conveying process, so as to achieve liquid separation without affecting the conveying of the liquid, and facilitate the improvement of the thermocline separation state and the diversity of liquid conveying methods.

[0006] Preferably, the control mechanism further comprises first springs fixedly mounted on the upper and lower sides of the control board, two groups of the first springs are fixedly connected to the inner walls of the control frame respectively, a plurality of communicating holes are provided on the control board, a plurality of first sealing blocks capable of being plugged and sealed with the upper through holes are fixedly connected to the upper side of the control board, a plurality of second sealing blocks capable of being plugged and sealed with the lower through holes are fixedly connected to the lower side of the control board, a lifting member for controlling the lifting state of the control board is provided in the heat storage tank, so as to facilitate controlling the lifting of the control board, thereby blocking the upper through holes and the lower through holes and then driving the control frame to lift synchronously, so as to achieve the purpose of actively sucking the liquid into the heat storage tank, and at the same time, the liquid can be directly transported into the heat storage tank by liquid pressure, and the positions of the control frame and the control board are adjusted during the transportation process, so as to achieve liquid separation without affecting the transportation of the liquid.

[0007] Preferably, the conveying mechanism includes a first water inlet pipe and a first drain pipe connected to the upper end of the heat storage tank, and the lower end of the heat storage tank is connected to the second water inlet pipe and the second drain pipe, so as to facilitate the conveying of the liquid.

[0008] Preferably, the lifting member includes a driving motor fixedly mounted on the base, the output end of the driving motor is coaxially fixedly connected with a driving shaft, the driving shaft passes through the bottom of the heat storage tank, the control frame and the control board, and is movably sleeved with the control frame and the inner wall of the control board, the driving shaft is rotatably connected to the heat storage tank, a plurality of guide grooves are provided in the heat storage tank, the outer wall of the control frame is fixedly connected with a guide block slidably connected to the inner wall of the guide groove in a vertical direction, and the control board is provided with a driving member for controlling the control board to be lifted and lowered when the driving shaft rotates, so as to control the lifting state of the control board.

[0009] Preferably, the driving member includes a driving block installed on the control panel, a sliding groove is provided in the control panel, the driving block is slidably connected to the inner wall of the sliding groove in a horizontal direction, a threaded groove is provided on the outer wall of the driving shaft, one end of the driving block is slidably connected to the inner wall of the threaded groove, and one end of the driving block away from the threaded groove is fixedly connected to a tension spring fixedly connected to the sliding groove, and a control member for controlling the sliding state of the driving block is provided on the control panel, so as to control the lifting and lowering of the control panel when the driving shaft rotates.

[0010] Preferably, the control member includes an arc plate installed on the control panel, an arc groove is provided on the control panel, the arc plate is slidably connected to the inner wall of the arc groove, the arc groove is communicated with the sliding groove, one end of the driving block close to the tension spring is slidably fitted with the side of the arc plate, a groove is provided in the middle of the side of the arc plate that can slidably fit with one end of the driving block, and a rotating member for driving the arc plate to rotate is provided on the control panel, so as to facilitate the control of the sliding state of the driving block.

[0011] Preferably, the rotating member includes a rotating ring rotatably connected to the control plate, the driving shaft passes through the rotating ring and is movably connected to the inner wall of the rotating ring, the outer wall of the driving shaft is provided with multiple groups of limit grooves, the inner wall of the rotating ring is fixedly connected with limit blocks that are slidably connected to the limit grooves along the vertical direction, both ends of the arc plate are fixedly connected with elastic ropes fixedly connected to the arc grooves, and the rotating ring is provided with a friction member for increasing the friction driving force on the arc plate, so as to drive the arc plate to rotate.

[0012] Preferably, the friction member includes a plurality of groups of bevel gear blocks mounted on the rotating ring, a lifting groove is provided on the rotating ring and is slidably connected to the bevel gear blocks in a vertical direction, a second spring is fixedly connected to the lifting groove on the upper side of the bevel gear blocks, and a plurality of groups of triangular grooves are provided on the side of the arc plate to facilitate enhancing the friction driving force on the arc plate.

[0013] Preferably, the first water inlet pipe, the first drainage pipe, the second water inlet pipe and the second drainage pipe are all provided with control valves to facilitate the control and regulation of the flow direction of the liquid.

[0014] Preferably, the control members are provided in two groups and are symmetrically distributed on the upper and lower sides of the control board, so as to make the movement and resistance of the driving block more stable.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a thermocline layer heat storage device for liquid heat storage, which solves the problem that it is difficult to ensure the internal liquid circulation and the stability of the temperature at the thermocline layer position in various ways when the existing thermocline layer heat storage device for liquid heat storage is used, which affects the heat storage and transportation efficiency. The liquid is transported by a transportation mechanism, and the control panel is controlled to rise and fall by a control mechanism, so that the upper through hole and the lower through hole are blocked and then the control frame is driven to rise and fall synchronously, so as to achieve the purpose of actively sucking the liquid into the heat storage tank. At the same time, the liquid can be directly transported into the heat storage tank by liquid pressure, and the positions of the control frame and the control panel are adjusted during the transportation process, so as to achieve liquid separation without affecting the transportation of the liquid.

[0017] 2. The present invention provides a thermocline layer heat storage device for liquid heat storage, which has a simple structure, convenient operation, and comprehensive functions. It can ensure that the cold and hot liquids are connected to each other to form a thermocline layer, while reducing the liquid flow rate in the thermocline layer area to ensure the temperature separation of the cold and hot liquids. At the same time, it can control the fluid in the heat storage tank to be transported by a driving motor. It can also automatically add and discharge the fluid inside the heat storage tank by relying only on the water pressure in the water inlet pipe without driving the motor, which is more stable and efficient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the local structure of the conveying mechanism of the present invention;

[0020] Figure 3 It is a schematic diagram of the local structure of the control mechanism of the present invention;

[0021] Figure 4 for Figure 3 A magnified image of area A;

[0022] Figure 5 It is an exploded view of the local structure of the control mechanism of the present invention;

[0023] Figure 6 It is a schematic diagram of the local structure of the control component of the present invention;

[0024] Figure 7 for Figure 6 Enlarged view of area B;

[0025] Figure 8 It is a schematic diagram of the local structure of the driving member of the present invention;

[0026] Fig. 9 for Figure 8 Enlarged view of area C.

[0027] In the figure: 1-base; 2-heat storage tank; 3-transport mechanism; 4-control mechanism; 5-control frame; 6-sliding cavity; 7-control board; 8-upper through hole; 9-lower through hole; 10-first spring; 11-connecting hole; 12-first sealing block; 13-second sealing block; 14-lifting member; 15-first water inlet pipe; 16-first drain pipe; 17-second water inlet pipe; 18-second drain pipe; 19-driving motor; 20-driving shaft; 21 -guide groove; 22-guide block; 23-driving member; 24-driving block; 25-sliding groove; 26-threaded groove; 27-tension spring; 28-control member; 29-arc plate; 30-arc groove; 31-groove; 32-rotating member; 33-rotating ring; 34-limiting groove; 35-limiting block; 36-elastic rope; 37-friction member; 38-bevel gear block; 39-lifting groove; 40-second spring; 41-triangular groove; 42-control valve. DETAILED DESCRIPTION

[0028] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 9 The present invention provides a technical solution: a temperature-slope heat storage device for liquid heat storage, comprising a base 1, a conveying mechanism 3 and a control mechanism 4, wherein a heat storage tank 2 is fixedly connected to the base 1, the conveying mechanism 3 is installed on the heat storage tank 2, and is used to convey the liquid, the control mechanism 4 comprises a control frame 5 installed in the heat storage tank 2, a sliding cavity 6 is provided in the control frame 5, a control board 7 is slidably connected in the sliding cavity 6 along the vertical direction, an upper through hole 8 and a lower through hole 9 are provided in the control frame 5, the upper through hole 8 is located on the upper side of the control board 7, and the lower through hole 9 is located on the lower side of the control board 7, and is used to control the control board 7 to rise and fall, so as to block the upper through hole 8 and the lower through hole 9 and then drive the control frame 5 to rise and fall synchronously, so as to achieve the purpose of actively sucking the liquid into the heat storage tank 2, and at the same time, the liquid can be directly conveyed into the heat storage tank 2 by liquid pressure, and the positions of the control frame 5 and the control board 7 are adjusted during the conveying process, so as to achieve liquid separation without affecting the conveying of the liquid.

[0030] The control mechanism 4 also includes a first spring 10 fixedly installed on the upper and lower sides of the control board 7. The two groups of first springs 10 are fixedly connected to the inner walls of the control frame 5 respectively. A plurality of connecting holes 11 are provided on the control board 7. A plurality of first sealing blocks 12 capable of plugging and sealing with the upper through holes 8 are fixedly connected to the upper side of the control board 7. A plurality of second sealing blocks 13 capable of plugging and sealing with the lower through holes 9 are fixedly connected to the lower side of the control board 7. A lifting member 14 for controlling the lifting state of the control board 7 is provided in the heat storage tank 2.

[0031] The conveying mechanism 3 includes a first water inlet pipe 15 and a first drain pipe 16 which are connected to the upper end of the heat storage tank 2, and a second water inlet pipe 17 and a second drain pipe 18 which are connected to the lower end of the heat storage tank 2. The first water inlet pipe 15, the first drain pipe 16, the second water inlet pipe 17 and the second drain pipe 18 are all provided with a control valve 42.

[0032] The lifting member 14 includes a driving motor 19 fixedly mounted on the base 1, and the driving motor 19 is preferably of model Y80M1-2. The output end of the driving motor 19 is coaxially fixedly connected with a driving shaft 20, and the driving shaft 20 passes through the bottom of the heat storage tank 2 and the control frame 5 and the control board 7, and is movably sleeved with the inner walls of the control frame 5 and the control board 7. The driving shaft 20 is rotatably connected to the heat storage tank 2. A plurality of guide grooves 21 are provided in the heat storage tank 2. The outer wall of the control frame 5 is fixedly connected with a guide block 22 that is slidably connected to the inner wall of the guide groove 21 in a vertical direction. The control board 7 is provided with a driving member 23 for controlling the control board 7 to be lifted and lowered when the driving shaft 20 rotates.

[0033] The driving member 23 includes a driving block 24 installed on the control panel 7. A sliding groove 25 is provided in the control panel 7. The driving block 24 is slidably connected to the inner wall of the sliding groove 25 along the horizontal direction. A threaded groove 26 is provided on the outer wall of the driving shaft 20. One end of the driving block 24 is slidably connected to the inner wall of the threaded groove 26. One end of the driving block 24 away from the threaded groove 26 is fixedly connected to a tension spring 27 fixedly connected to the sliding groove 25. A control member 28 for controlling the sliding state of the driving block 24 is provided on the control panel 7. Two groups of control members 28 are provided and are symmetrically distributed on the upper and lower sides of the control panel 7.

[0034] The control member 28 includes an arc plate 29 installed on the control panel 7, an arc groove 30 is provided on the control panel 7, the arc plate 29 is slidably connected to the inner wall of the arc groove 30, the arc groove 30 is communicated with the sliding groove 25, the end of the driving block 24 close to the tension spring 27 is slidably fitted with the side of the arc plate 29, a groove 31 which can be slidably fitted with one end of the driving block 24 is provided in the middle of the side of the arc plate 29, and a rotating member 32 for driving the arc plate 29 to rotate is provided on the control panel 7.

[0035] The rotating member 32 includes a rotating ring 33 rotatably connected to the control plate 7, the driving shaft 20 passes through the rotating ring 33 and is movably sleeved with the inner wall of the rotating ring 33, the outer wall of the driving shaft 20 is provided with multiple groups of limit grooves 34, the inner wall of the rotating ring 33 is fixedly connected with a limit block 35 that is slidably connected to the limit groove 34 in the vertical direction, both ends of the arc plate 29 are fixedly connected with an elastic rope 36 that is fixedly connected to the arc groove 30, the rotating ring 33 is provided with a friction member 37 for increasing the friction driving force on the arc plate 29, the friction member 37 includes multiple groups of bevel gear blocks 38 installed on the rotating ring 33, the rotating ring 33 is provided with a lifting groove 39 that is slidably connected to the bevel gear block 38 in the vertical direction, the upper side of the bevel gear block 38 is fixedly connected with a second spring 40 that is fixedly connected to the lifting groove 39, and the side of the arc plate 29 is provided with multiple groups of triangular grooves 41.

[0036] In this embodiment, when it is necessary to electrically control the liquid in and out of the heat storage tank 2, the drive motor 19 is started to drive the drive shaft 20 to rotate, and the drive shaft 20 drives the limit groove 34 to make the limit block 35 and the rotating ring 33 rotate. The multiple groups of bevel gear blocks 38 at the bottom of the rotating ring 33 rub the triangular groove 41, so that the arc plate 29 rotates in the same direction and is limited after reaching the set position. At this time, one end of the drive block 24 slides from the inside of the groove 31 to one end position of the arc plate 29, and is pushed to one side of the thread groove 26 by the arc plate 29. After the thread groove 26 rotates to the corresponding position, one end of the drive block 24 is inserted into the thread groove 26, and the other end is limited by the resistance of the arc plate 29, which can ensure that the drive block 24 is always in the thread groove 26. As the drive shaft 20 drives the thread groove 26 to rotate, the drive block 24 drives the control plate 7 to rise and fall.

[0037] The lifting state of the control board 7 is changed according to the different rotation directions of the driving shaft 20 driven by the driving motor 19. No matter in which direction the driving shaft 20 drives the rotating ring 33 to rotate, the rotating ring 33 will make the driving block 24 rotate out from the middle of the groove 31 and abut and limit the side walls at both ends of the arc plate 29, completing the docking and sliding of the driving block 24 and the threaded groove 26, thereby driving the control board 7 to rise and fall.

[0038] When the control panel 7 rises, the first spring 10 on the upper side is compressed, the first sealing block 12 moves up to be plugged and sealed with the upper through hole 8, and the control valve 42 on the first drain pipe 16 and the second water inlet pipe 17 is opened. After that, the liquid on the upper side can be discharged through the first drain pipe 16, and the liquid in the second water inlet pipe 17 is pumped into the bottom position of the heat storage tank 2. Conversely, when the control panel 7 moves down, the first spring 10 on the lower side is compressed, the second sealing block 13 moves down to be plugged and sealed with the lower through hole 9, and the control valve 42 on the second drain pipe 18 and the first water inlet pipe 15 is opened. The liquid on the lower side can be discharged through the second drain pipe 18, and the liquid in the first water inlet pipe 15 can be pumped into the upper area of ​​the heat storage tank 2.

[0039] When the water pumping and transportation is completed, the driving motor 19 drives the driving shaft 20 to rotate in the reverse direction at a set angle, so that the rotating ring 33 drives the arc plate 29 to rotate in the reverse direction for a certain arc length, and rotates one end of the driving block 24 to the groove 31 position, wherein the elastic rope 36 is used to assist the arc plate 29 to rotate to the central position after the rotating ring 33 releases the rotation drive of the arc plate 29, and under the pull of the tension spring 27, the driving block 24 is released from the connection with the thread groove 26, and then the control frame 5 as a whole can be suspended in the liquid, wherein the temperature gradient layer utilizes the characteristic that the density of the liquid increases with the decrease of temperature, and controls the overall density of the internal structure of the control frame 5 to be within the required range. The density between the temperatures of the stratified liquids, for example, if the liquid needs to be stratified into a lower layer with a temperature below 4°C and an upper layer with a temperature above 15°C, it is necessary to measure the average density of the liquid between 4-15°C, and then adjust the material of the overall seal of the internal structure of the control frame 5 to make its density close to the required average density, so that the control frame 5 can automatically float to the middle of the two layers for separation during the transportation of the two layers of liquid from the upper and lower sides inside the heat storage tank 2. At the same time, the upper through hole 8, the lower through hole 9 and the connecting hole 11 can ensure that the liquids on both sides are connected while reducing the flow rate at the connecting position, thereby achieving the purpose of temperature control and regulation of the inclined temperature layer.

[0040] When the liquid in the heat storage tank 2 can be squeezed and replaced directly by the water pressure in the water inlet pipe, the control valve 42 on the first water inlet pipe 15 and the second drain pipe 18 can be directly opened to increase the liquid on the upper side of the control board 7. Since the inner diameters of the upper through hole 8, the lower through hole 9 and the connecting hole 11 are small, the internal liquid flow rate is slow, so that in the process of rapid increase of the liquid on the upper side, the control frame 5 and the control board 7 are pushed downward as a whole, and at the same time, the low-temperature liquid on the lower side automatically flows downward into the second drain pipe 18 under the action of gravity to be discharged for subsequent refrigeration treatment.

[0041] Similarly, by opening the second water inlet pipe 17 and the first drain pipe 16, the low-temperature liquid can be injected into the heat storage tank 2 from the bottom, and the control frame 5 and the control panel 7 can be pushed upward as a whole to discharge the high-temperature liquid on the upper side from the first drain pipe 16, thereby realizing automatic liquid transportation. At this time, the limit block 35 slides in the vertical direction inside the limit groove 34, the driving block 24 does not contact the thread groove 26, and the control frame 5 and the guide block 22 are vertically lifted and slid along the guide groove 21, thereby realizing automatic liquid transportation and separation operations without the need to drive the motor 19 to run.

[0042] The device has a simple structure, convenient operation, and comprehensive functions. It can ensure that the cold and hot liquids are connected to each other to form a thermocline layer, while reducing the liquid flow rate in the thermocline layer area to ensure the temperature separation of the cold and hot liquids. At the same time, it can control the transportation of the fluid in the heat storage tank 2 through the driving motor 19. It can also automatically add and discharge the fluid inside the heat storage tank 2 by relying solely on the water pressure in the water inlet pipe without the driving motor 19, which is more stable and efficient to use.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermocline heat storage device for liquid heat storage, characterized in that: include: A base (1), to which a heat storage tank (2) is fixedly connected; Also includes: A conveying mechanism (3), the conveying mechanism (3) being installed on the heat storage tank (2) and being used for conveying liquid; A control mechanism (4), the control mechanism (4) comprising a control frame (5) installed in the heat storage tank (2), a sliding cavity (6) being provided in the control frame (5), a control board (7) being slidably connected in the sliding cavity (6) along a vertical direction, an upper through hole (8) and a lower through hole (9) being provided in the control frame (5), the upper through hole (8) being located on the upper side of the control board (7), the lower through hole (9) being located on the lower side of the control board (7), and being used for controlling the control board (7) to be raised and lowered, so that the upper through hole (8) and the lower through hole (9) are blocked and then the control frame (5) is driven to be raised and lowered synchronously, so as to achieve the purpose of actively sucking the liquid into the heat storage tank (2), and at the same time, the liquid can be directly transported into the heat storage tank (2) by liquid pressure, and the positions of the control frame (5) and the control board (7) are adjusted during the transport process, so as to achieve liquid separation without affecting the transport of the liquid.

2. A thermocline heat storage device for liquid heat storage according to claim 1, characterized in that: The control mechanism (4) further comprises first springs (10) fixedly mounted on the upper and lower sides of the control panel (7); two groups of the first springs (10) are respectively fixedly connected to the inner wall of the control frame (5); a plurality of communication holes (11) are provided on the control panel (7); a plurality of first sealing blocks (12) capable of plugging and sealing with the upper through holes (8) are fixedly connected to the upper side of the control panel (7); a plurality of second sealing blocks (13) capable of plugging and sealing with the lower through holes (9) are fixedly connected to the lower side of the control panel (7); and a lifting member (14) for controlling the lifting state of the control panel (7) is provided in the heat storage tank (2).

3. A thermocline heat storage device for liquid heat storage according to claim 2, characterized in that: The conveying mechanism (3) comprises a first water inlet pipe (15) and a first drain pipe (16) which are connected to the upper end of the heat storage tank (2), and a second water inlet pipe (17) and a second drain pipe (18) are connected to the lower end of the heat storage tank (2).

4. The thermocline heat storage device for liquid heat storage according to claim 2, characterized in that: The lifting member (14) comprises a driving motor (19) fixedly mounted on the base (1); the output end of the driving motor (19) is coaxially fixedly connected with a driving shaft (20); the driving shaft (20) passes through the bottom of the heat storage tank (2) and the control frame (5) and the control board (7), and is movably sleeved with the inner walls of the control frame (5) and the control board (7); the driving shaft (20) is rotatably connected with the heat storage tank (2); a plurality of guide grooves (21) are provided in the heat storage tank (2); the outer wall of the control frame (5) is fixedly connected with a guide block (22) slidably connected with the inner wall of the guide groove (21) in a vertical direction; and the control board (7) is provided with a driving member (23) for controlling the control board (7) to be lifted and lowered when the driving shaft (20) rotates.

5. The thermocline heat storage device for liquid heat storage according to claim 4, characterized in that: The driving member (23) comprises a driving block (24) mounted on the control board (7); a sliding groove (25) is provided in the control board (7); the driving block (24) is slidably connected to the inner wall of the sliding groove (25) in a horizontal direction; a thread groove (26) is provided on the outer wall of the driving shaft (20); one end of the driving block (24) is slidably connected to the inner wall of the thread groove (26); one end of the driving block (24) away from the thread groove (26) is fixedly connected to a tension spring (27) fixedly connected to the sliding groove (25); and a control member (28) for controlling the sliding state of the driving block (24) is provided on the control board (7).

6. The thermocline heat storage device for liquid heat storage according to claim 5, characterized in that: The control member (28) comprises an arc plate (29) mounted on the control panel (7), an arc groove (30) being provided on the control panel (7), the arc plate (29) being slidably connected to the inner wall of the arc groove (30), the arc groove (30) being communicated with the sliding groove (25), one end of the driving block (24) close to the tension spring (27) being slidably fitted with the side surface of the arc plate (29), a groove (31) being slidably fitted with one end of the driving block (24) being provided in the middle of the side surface of the arc plate (29), and a rotating member (32) being provided on the control panel (7) for driving the arc plate (29) to rotate.

7. The thermocline heat storage device for liquid heat storage according to claim 6, characterized in that: The rotating member (32) comprises a rotating ring (33) rotatably connected to the control plate (7); the driving shaft (20) passes through the rotating ring (33) and is movably sleeved on the inner wall of the rotating ring (33); the outer wall of the driving shaft (20) is provided with a plurality of groups of limit grooves (34); the inner wall of the rotating ring (33) is fixedly connected with a limit block (35) slidably connected to the limit groove (34) in a vertical direction; both ends of the arc plate (29) are fixedly connected with an elastic rope (36) fixedly connected to the arc groove (30); and a friction member (37) for increasing the friction driving force on the arc plate (29) is provided on the rotating ring (33).

8. The thermocline heat storage device for liquid heat storage according to claim 7, characterized in that: The friction member (37) comprises a plurality of groups of bevel gear blocks (38) mounted on the rotating ring (33); a lifting groove (39) is provided on the rotating ring (33) and is slidably connected to the bevel gear blocks (38) along a vertical direction; a second spring (40) is fixedly connected to the lifting groove (39) on the upper side of the bevel gear blocks (38); and a plurality of groups of triangular grooves (41) are provided on the side surface of the arc plate (29).

9. The thermocline heat storage device for liquid heat storage according to claim 3, characterized in that: The first water inlet pipe (15), the first drainage pipe (16), the second water inlet pipe (17) and the second drainage pipe (18) are all provided with control valves (42).

10. The thermocline heat storage device for liquid heat storage according to claim 5, characterized in that: The control members (28) are provided in two groups and are symmetrically distributed on the upper and lower sides of the control panel (7).

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