Molten salt heat storage tank and working method thereof
By setting up a multi-stage buffering and shock-absorbing structure in the molten salt heat storage tank, including connecting blocks, springs, buffer rods and airbags, the damage problem of molten salt heat storage tank during vibration is solved, and safety and heat storage efficiency are improved.
Patent Information
- Application Number
- CN202510611187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-25
AI Technical Summary
The existing molten salt heat storage tanks ignore the shock absorption function during design, which leads to easy damage when subjected to large vibrations, resulting in molten salt leakage and equipment damage, and unable to work stably.
A molten salt heat storage tank with a multi-stage buffering and shock-absorbing structure is designed, including a base, tank body, connecting block, spring, buffer rod, guide sleeve, guide block and airbag, etc., to protect the tank body through multi-stage buffering to absorb and buffer the impact force generated by vibration.
It effectively avoids the damage to the tank body caused by excessive vibration amplitude, improves the safety and stability of the molten salt heat storage tank and ensures the safe operation of the equipment and the uniform heating of molten salt.
Smart Images
Figure CN120368765A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of molten salt heat storage, and particularly relates to a molten salt heat storage tank and its working method. Background Art
[0003] As an important energy storage method, the electric heat storage device stores electric energy as heat by using off-peak electricity at night to heat the heat storage medium, and then transfers the heat to carriers such as hot water through heat exchange tubes for users to use when needed. This device can not only effectively balance the power supply and demand, but also improve the energy utilization efficiency and reduce the energy cost. At present, the heat storage medium in the electric heat storage device generally uses molten salt because molten salt has the advantages of good thermal stability, high heat storage density, and low cost; in addition, storage tanks are usually used to store molten salt, and in order to reduce heat loss, the bottom, wall, and top of the tank are all designed with a heat preservation structure with good heat insulation performance to ensure the heat storage efficiency.
[0004] The existing molten salt heat storage tanks have achieved certain results in terms of heat preservation performance and heat storage efficiency, but there are still some problems to be solved urgently in the actual use process; among them, the existing molten salt heat storage tanks often neglect the shock absorption function in the design. When the heat storage tank is subjected to some large vibrations (such as earthquakes, mechanical vibrations, etc.), due to the lack of effective shock absorption measures, the heat storage tank is easily damaged, resulting in the leakage of molten salt, and then causing problems such as equipment damage and unstable operation. Therefore, in order to ensure the safe and stable operation of the molten salt heat storage tank and improve its seismic performance, it is particularly important to design a storage tank for molten salt heat storage with a shock absorption function, which not only meets the urgent needs of the current "coal-to-electricity" project for the safety and reliability of heat storage devices, but also is the key to promoting the further development and application of electric heat storage technology. Summary of the Invention
[0005] The purpose of the present invention is to provide a molten salt heat storage tank and its working method to solve one or more of the above-mentioned technical problems. In the technical solution disclosed by the present invention, a multi-stage buffer shock absorption structure is provided, which can effectively buffer and protect the tank body, and can avoid the occurrence of tank body damage caused by excessive vibration amplitude, effectively solving the deficiency of the existing molten salt heat storage tank in terms of seismic performance, and improving the safety stability and heat storage efficiency.
[0006] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a molten salt heat storage tank, including: a base, a mounting frame, and a tank body; wherein, The side wall of the base is provided with a vertical chute, a connecting block is slidably installed in the chute, a first spring is arranged between the connecting block and the chute, and the tank body is installed on the connecting block; a rotating shaft is rotatably installed in the tank body, stirring blades are installed on the rotating shaft, and a driving assembly for driving the rotating shaft to rotate is installed on the tank body; A guiding groove is formed in the base, a guiding rod is arranged above the guiding groove, and two ends of the guiding rod are respectively connected to the side walls of the base; two guiding sleeves are symmetrically and slidably installed on the guiding rod, a buffer rod is hinged to the guiding sleeve, one end of the buffer rod away from the guiding sleeve is hinged to the tank body, and a second spring is arranged between the two guiding sleeves; two guiding blocks are slidably installed in the guiding groove, and the two guiding blocks are respectively connected to the two guiding sleeves; An installation frame is installed on the base, a buffer cavity is formed in the installation frame, two pressing plates are slidably installed in the buffer cavity, and an air bag is arranged between each pressing plate and the side wall of the buffer cavity; connecting ropes are respectively installed on the two guiding blocks, and one end of the connecting rope away from the guiding block extends into the buffer cavity through the guiding groove and a wire wheel installed on the installation frame and is connected to one of the pressing plates, so that the pressing plate can compress the air bag under the pulling of the connecting rope; wherein, the connecting rope is wound around the wire wheel.
[0007] A further improvement of the technical solution of the present invention is that the connection structure of the first spring between the connecting block and the chute is specifically that the connecting block is fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the bottom wall of the chute.
[0008] A further improvement of the technical solution of the present invention is that the driving assembly includes: a driving member, a driving shaft and a connecting unit; wherein, The driving member is fixedly installed on the tank body; the output end of the driving member is installed with the driving shaft, one end of the driving shaft away from the driving member extends into the tank body, and one end of the driving shaft away from the driving member is connected to the rotating shaft as a driven shaft through the connecting unit.
[0009] A further improvement of the technical solution of the present invention is that the driving member is a stepping motor.
[0010] A further improvement of the technical solution of the present invention is that the connecting unit is a gear set, a worm and worm gear or a coupling.
[0011] A further improvement of the technical solution of the present invention lies in that a buffer groove is provided on the guide rod, a buffer block is slidably installed in the buffer groove, a shock-absorbing rod is hinged to the buffer block, and one end of the shock-absorbing rod away from the buffer block is hinged to the buffer rod; one side of the buffer block is connected with an elastic component, and one end of the elastic component away from the buffer block is connected with the side wall of the buffer groove.
[0012] A further improvement of the technical solution of the present invention lies in that the elastic component is a spring shock absorber.
[0013] A further improvement of the technical solution of the present invention further includes: an electric heater; wherein, The electric heater is arranged in the tank body and is used to heat the molten salt in the tank body by using off-peak electricity.
[0014] A further improvement of the technical solution of the present invention further includes: a transporting device; wherein, The transporting device is arranged at the bottom of the base and is used to realize the transportation of the molten salt heat storage tank.
[0015] The present invention provides a working method for a molten salt heat storage tank, including: When the molten salt is placed in the tank body and heated, the driving assembly drives the rotating shaft to drive the stirring blades to rotate, so as to stir the molten salt and make the molten salt evenly heated; During the operation, when vibrations occur, the tank body is vibrated and the first spring is compressed through the connecting block. The impact force generated by the vibration is buffered by the compression of the first spring; during the downward movement of the tank body, the buffer rod drives the two guide sleeves to move towards each other. When the guide sleeves move towards each other, the second spring arranged in the middle is compressed, and the impact force generated by the vibration is buffered by the compression of the second spring; during the process of the guide sleeves moving towards each other, the two guide blocks are driven to move towards each other. When the guide blocks move towards each other, the connecting rope is pulled and the pressing plate presses the arranged airbag to buffer the impact force generated by the vibration.
[0016] Compared with the prior art, the present invention has the following beneficial effects: In the design of existing molten salt heat storage tanks, the shock absorption function is often ignored, resulting in easy breakage when subjected to large vibrations, and further causing problems such as molten salt leakage, equipment damage, and unstable operation. The present invention specifically discloses a molten salt heat storage tank with a shock absorption function, which mainly includes a base, a mounting frame, and a tank body; a chute and a guide groove are provided on the base, and the tank body is connected to a first spring in the chute through a connecting block to achieve shock absorption in the vertical direction; at the same time, the tank body is also connected to the base through structures such as a buffer rod, a guide sleeve, a second spring, a guide block, and a guide rod to achieve shock absorption in multiple directions; in addition, a buffer cavity, a pressure plate, and an airbag are provided on the mounting frame, and are connected to the guide block through a connecting rope and a wire pulley, which can further enhance the shock absorption effect. Summarily, in the technical solution disclosed by the present invention, a multi-stage buffer shock absorption structure is provided, which can effectively buffer and protect the tank body, and can avoid the occurrence of tank body breakage caused by excessive vibration amplitude; in addition, a rotating shaft and a stirring blade are provided in the tank body, and the rotating shaft is driven to rotate by a driving component, thereby driving the stirring blade to rotate, which can improve the uniform heating of the molten salt.
[0017] In the technical solution of the present invention, the tank body is connected to the first spring in the chute through a connecting block. When the tank body is subjected to vibrations in the vertical direction, the first spring will be compressed or stretched, thereby absorbing and buffering the impact force generated by the vibration. The tank body is connected to the guide sleeve through a buffer rod. The guide sleeve is slidably installed on the guide rod, and a second spring is provided between the two guide sleeves; when the tank body is subjected to vibrations in multiple directions, the buffer rod will drive the guide sleeves to move towards or away from each other, and the second spring will be compressed or stretched, thereby absorbing and buffering the impact force generated by the vibration. When the guide sleeve moves, it will also drive the guide block to slide in the guide groove. The guide block is connected to the pressure plate through a connecting rope, and the pressure plate will compress the airbag, further enhancing the shock absorption effect. Summarily, the present invention effectively absorbs and buffers the impact force generated by the vibration through the shock absorption structures in the vertical direction and multiple directions, improving the seismic performance of the molten salt heat storage tank; the design of the shock absorption structure makes the molten salt heat storage tank not easily damaged when subjected to large vibrations, thereby ensuring its safe and stable operation; the design of the stirring blade makes the molten salt heated evenly and improves the heat storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art; obviously, the following drawings are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 is a schematic structural diagram of a molten salt heat storage tank in an embodiment of the present invention; Figure 2 is a schematic structural diagram of the stirring blade in an embodiment of the present invention; Figure 3 is Figure 1 An enlarged schematic view of part A in the illustrated embodiment; Figure 4 is a schematic structural view of a connection unit in an embodiment of the present invention; Figures 1 to 4 The explanations of the reference numerals in the figures are as follows: 1, base; 2, mounting frame; 3, chute; 4, connection block; 5, first spring; 6, tank body; 7, driving member; 8, driving shaft; 9, connection unit; 10, stirring blade; 11, driven shaft; 12, guide rod; 13, guide sleeve; 14, buffer rod; 15, shock-absorbing rod; 16, elastic member; 17, buffer groove; 18, second spring; 19, connecting rod; 20, guide block; 21, wire pulley; 22, buffer cavity; 23, pressing plate; 24, airbag; 25, connecting rope. Specific embodiments
[0020] To make the objectives, technical solutions and advantages 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 in the embodiments of the present invention; obviously, the described embodiments are only a part, rather than all, of the embodiments of the present invention.
[0021] Based on the technical solutions disclosed in the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, the terms "comprise" and "have", and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.
[0022] Please refer to Figures 1 to 4, a storage tank for molten salt thermal energy storage provided by an embodiment of the present invention includes a base 1. A vertical chute 3 is provided on the side wall of the base 1. A connecting block 4 is slidably installed in the chute 3. A first spring 5 is provided between the connecting block 4 and the chute 3. On one side of the connecting block 4, a tank body 6 is installed. A rotating shaft is rotatably installed on the side wall of the tank body 6, and a stirring blade 10 is installed on the rotating shaft. A driving assembly for driving the rotating shaft is installed on the tank body 6. In an exemplary alternative technical solution, the first spring 5 is installed at the bottom of the connecting block 4, and the end of the first spring 5 away from the connecting block 4 is connected to the bottom wall of the chute 3. The driving assembly includes a driving member 7 installed on the tank body 6. The output end of the driving member 7 is provided with a driving shaft 8. The end of the driving shaft 8 away from the driving member 7 extends into the tank body 6. A connecting unit 9 is installed at the end of the driving shaft 8 away from the driving member 7. The end of the connecting unit 9 away from the driving shaft 8 is connected to the rotating shaft serving as a driven shaft 11. An installation frame 2 is installed on the base 1. A guiding groove is provided on the base 1. A guiding rod 12 is installed above the guiding groove. Both ends of the guiding rod 12 are connected to the side wall of the base 1. Two guiding sleeves 13 are symmetrically and slidably installed on the guiding rod 12. A buffer rod 14 is hinged to the guiding sleeve 13. The end of the buffer rod 14 away from the guiding sleeve 13 is hinged to the tank body 6. A second spring 18 is provided between the two guiding sleeves 13. A buffer assembly is provided at the bottom of the guiding sleeve 13. The buffer assembly includes a guiding groove provided on the base 1. A guiding block 20 is slidably installed in the guiding groove. A connecting rod 19 is installed on the guiding block 20. The end of the connecting rod 19 away from the guiding block 20 is connected to the guiding sleeve 13. Wire wheels 21 are installed on both the guiding groove and the installation frame 2. A buffer cavity 22 is provided on the installation frame 2. A pressing plate 23 is slidably installed in the buffer cavity 22. An airbag 24 is provided on one side of the pressing plate 23. A connecting rope 25 is installed on the guiding block 20. The end of the connecting rope 25 away from the guiding block 20 extends into the buffer cavity 22 and is connected to the pressing plate 23. The connecting rope 25 is wound around the wire wheel 21. In a further preferred technical solution, a shock absorption assembly is installed on the buffer rod 14. The shock absorption assembly includes a buffer groove 17 provided on the guiding rod 12. A buffer block is slidably installed in the buffer groove 17. A shock absorption rod 15 is hinged to the buffer block. The end of the shock absorption rod 15 away from the buffer block is hinged to the buffer rod 14. An elastic member 16 is connected to one side of the buffer block. The end of the elastic member 16 away from the buffer block is connected to the side wall of the buffer groove 17, as Figure 3 shown.
[0023] The working condition of the technical solution provided by the embodiment of the present invention is as follows: The molten salt is placed in the tank body 6. When the molten salt is heated, the installed driving member 7 drives the connected driving shaft 8 to rotate. The driving shaft 8 drives the driven shaft 11 to rotate through the connecting unit 9, and then drives the stirring blade 10 to rotate, so as to stir the molten salt in the tank body 6, make the molten salt evenly heated, and improve the heating efficiency of the molten salt. When the device vibrates during operation, the pressure generated by the vibration on the tank body 6 will compress the first spring 5. The compression of the first spring 5 will buffer the impact force generated by the vibration. During the downward movement of the tank body 6, the provided buffer rod 14 will drive the guide sleeve 13 to move towards each other. The mutual movement of the guide sleeve 13 will further compress the second spring 18 arranged in the middle, and the compression of the second spring 18 will further buffer the pressure generated by the vibration. At the same time, during the mutual movement of the guide sleeve 13, it will drive the guide block 20 at one end of the connecting rod 19 to move towards each other. The mutual movement of the guide block 20 will pull the connecting rope 25, and the connecting rope 25 will pull the pressing plate 23 at one end to press the provided airbag 24, thereby further buffering the impact force generated by the vibration. In addition, in the preferred technical solution, during the rotation of the buffer rod 14, the provided shock-absorbing rod 15 will drive the buffer block at one end to compress the elastic member 16 on one side. The compression of the elastic member 16 can further buffer and decompress the pressure generated by the vibration, playing a good role in buffering and protecting the provided tank body, and avoiding the tank body being damaged due to excessive vibration amplitude.
[0024] In a specific embodiment of the present invention, the driving member 7 is a stepper motor or a servo motor, etc., and no specific description is made here; the elastic member 16 is a spring shock absorber or a rubber shock absorber, etc., and no specific description is made here; the connecting unit 9 is selected from any one of structures such as a gear set, a worm and a worm wheel, or a coupling, etc. The preferred technical solution can adopt a gear set, as Figure 4 shown.
[0025] In a specific embodiment of the present invention, a molten salt heat storage tank is further provided with: an electric heater; wherein, the electric heater is arranged in the tank body (6) for heating the molten salt in the tank body (6) by using off-peak electricity. In addition, a transporting device is further provided; wherein, the transporting device is arranged at the bottom of the base (1) for realizing the transportation of the molten salt heat storage tank.
[0026] In the technical solution of the specific embodiment of the present invention, the electric heater is provided so that off-peak electricity can be used for heating, further improving the economy of the heat storage system. (Explanatorily, off-peak electricity refers to the electricity provided by the power grid during off-peak hours of electricity consumption, and its price is relatively low. By heating the molten salt in the tank with an electric heater during off-peak hours, the electricity cost can be significantly reduced, thereby improving the economy of the entire heat storage system. This strategy not only conforms to the environmental protection concept of energy conservation and emission reduction but also conforms to the efficient principle of modern energy management.) In practical applications, users can flexibly select the heating period according to the load situation and electricity price of the power grid to further optimize the energy use efficiency. In addition, the setting of the transportation device can improve the flexibility of the molten salt heat storage tank and effectively reduce the vibration generated during transportation. (Explanatorily, whether in the factory production, on-site installation, or later maintenance process, the heat storage tank needs to be moved or transported. Traditional moving methods often require the use of large equipment such as cranes or forklifts, which are not only complex to operate and costly but also prone to generating vibrations during the movement, potentially damaging the heat storage tank. The setting of the transportation device in the present invention greatly improves the flexibility of the molten salt heat storage tank, making the movement of the molten salt heat storage tank easier and safer.)
[0027] In summary, the embodiment of the present invention discloses a novel storage tank for molten salt heat storage, including a base, a tank body, a first spring, a driving component, a stirring blade, a buffer component, and a shock absorption component. When heating the molten salt, the driving component drives the stirring blade to rotate so that the molten salt is heated evenly. During the operation of the device, vibrations will occur. The pressure generated by the vibrations on the tank body will further compress the first spring. The compression of the first spring will buffer the impact force generated by the vibrations. At the same time, during the downward movement of the tank body, the provided buffer component can further buffer the impact force generated by the vibrations. During the rotation of the buffer rod, the provided shock absorption rod will drive a buffer block at one end to compress an elastic component on one side. The compression of the elastic component can further buffer and decompress the pressure generated by the vibrations, playing a good buffer protection role for the provided tank body and preventing the tank body from being damaged due to excessive vibration amplitude.
[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A molten salt heat storage tank, characterized in that, Including: A base (1), a mounting frame (2) and a tank body (6); wherein, A vertical chute (3) is provided on the side wall of the base (1), a connecting block (4) is slidably mounted in the chute (3), a first spring (5) is provided between the connecting block (4) and the chute (3), and the tank body (6) is mounted on the connecting block (4); a rotating shaft is rotatably mounted in the tank body (6), a stirring blade (10) is mounted on the rotating shaft, and a driving assembly for driving the rotating shaft to rotate is mounted on the tank body (6); A guiding groove is formed on the base (1), a guiding rod (12) is provided above the guiding groove, and two ends of the guiding rod (12) are respectively connected to the side walls of the base (1); two guiding sleeves (13) are symmetrically and slidably mounted on the guiding rod (12), a buffer rod (14) is hinged to the guiding sleeve (13), and one end of the buffer rod (14) far from the guiding sleeve (13) is hinged to the tank body (6), and a second spring (18) is provided between the two guiding sleeves (13); two guiding blocks (20) are slidably mounted in the guiding groove, and the two guiding blocks (20) are respectively connected to the two guiding sleeves (13); The mounting frame (2) is mounted on the base (1), a buffer cavity (22) is formed in the mounting frame (2), two pressing plates (23) are slidably mounted in the buffer cavity (22), and an air bag (24) is provided between each pressing plate (23) and the side wall of the buffer cavity (22); connecting ropes (25) are respectively mounted on the two guiding blocks (20), and one end of the connecting rope (25) far from the guiding block (20) extends into the buffer cavity (22) through the guiding groove and a wire wheel (21) mounted on the mounting frame (2) and is connected to one of the pressing plates (23), so that the pressing plate (23) can compress the air bag (24) under the pulling of the connecting rope (25).
2. The molten salt heat storage tank according to claim 1, characterized in that, The connection structure of the first spring (5) between the connecting block (4) and the chute (3) is specifically that the connecting block (4) is fixedly connected to one end of the first spring (5), and the other end of the first spring (5) is fixedly connected to the bottom wall of the chute (3).
3. A molten salt heat storage tank according to claim 1, characterized in that, The driving assembly includes: a driving member (7), a driving shaft (8) and a connecting unit (9); wherein, The driving member (7) is fixedly mounted on the tank body (6); the output end of the driving member (7) is mounted with the driving shaft (8), one end of the driving shaft (8) far from the driving member (7) extends into the tank body (6), and one end of the driving shaft (8) far from the driving member (7) is connected to the rotating shaft as a driven shaft through the connecting unit (9).
4. A molten salt heat storage tank according to claim 3, characterized in that, The driving member (7) is a stepping motor.
5. A molten salt heat storage tank according to claim 3, characterized in that, The connecting unit (9) is a gear set, a worm and worm gear or a coupling.
6. A molten salt heat storage tank according to claim 1, characterized in that, A buffer groove (17) is formed in the guide rod (12). A buffer block is slidably mounted in the buffer groove (17). A shock-absorbing rod (15) is hinged to the buffer block. One end of the shock-absorbing rod (15) far from the buffer block is hinged to the buffer rod (14). One side of the buffer block is connected with an elastic member (16). One end of the elastic member (16) far from the buffer block is connected with the side wall of the buffer groove (17).
7. A molten salt heat storage tank according to claim 6, characterized in that, The elastic member (16) is a spring shock absorber.
8. A molten salt heat storage tank according to claim 1, characterized in that, It further includes: An electric heater; wherein, The electric heater is arranged in the tank body (6) and is used to heat the molten salt in the tank body (6) by using off-peak electricity.
9. The molten salt heat storage tank according to claim 1, characterized in that, It further includes: A transportation device; wherein, The transportation device is arranged at the bottom of the base (1) and is used to realize the transportation of the molten salt heat storage tank.
10. A working method of the molten salt heat storage tank according to claim 1, characterized in that, It includes: When the molten salt is placed in the tank body (6) and heated, the driving assembly drives the rotating shaft to drive the stirring blades (10) to rotate, so as to stir the molten salt and make the molten salt heated evenly. During operation, when vibration occurs, the tank body (6) is vibrated and compresses the first spring (5) through the connecting block (4). The impact force generated by the vibration is buffered by the compression of the first spring (5). During the downward movement of the tank body (6), the buffer rod (14) drives the two guide sleeves (13) to move towards each other. When the guide sleeves (13) move towards each other, the second spring (18) arranged in the middle is compressed. The impact force generated by the vibration is buffered by the compression of the second spring (18). During the process of the guide sleeves (13) moving towards each other, the two guide blocks (20) are driven to move towards each other. When the guide blocks (20) move towards each other, the connecting rope (25) is pulled and the pressing plate (23) presses the arranged airbag (24) to buffer the impact force generated by the vibration.