Small-flow high-temperature molten salt pump

Abstract

The utility model relates to the technical field of molten salt pumps, and discloses a small-flow high-temperature molten salt pump which comprises a pump body, a pump shaft is connected in the pump body in a sliding mode, a partition assembly is arranged on the outer wall of the pump shaft and comprises a first hollow ring and a second hollow ring, and the first hollow ring and the second hollow ring are both connected to the outer wall of the pump shaft in a sliding mode. The first hollow ring and the second hollow ring are both filled with heat conduction oil, one side of the first hollow ring is fixedly connected with a connecting block, one side of the connecting block is fixedly connected with a liquid storage bin, and the side wall of the first hollow ring and the side wall of the second hollow ring are provided with disassembling and assembling assemblies which are in bilateral symmetry. According to the utility model, heat conduction oil is firstly poured into the hollow ring I and the hollow ring II by an operator, and the heat conduction oil is circulated through the output end and the input end of the circulating pump, so that the effect of isolating heat transfer is achieved, the problems of insulation aging and lubrication failure caused by overheating of the motor are solved, and the operation stability of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of molten salt pump technology, and in particular to a small-flow-rate high-temperature molten salt pump. Background Technology

[0002] High-temperature molten salt pumps are key equipment used to transport high-temperature molten salts and are widely used in fields such as solar thermal power generation, nuclear energy systems, and chemical processes. Among them, small-flow high-temperature molten salt pumps play an important role in scenarios such as precise temperature control, intermittent operation, or transportation of high-purity media. Due to the high temperature, strong corrosiveness, and easy solidification characteristics of molten salts, these pumps require special design in terms of materials, sealing, and thermal management to ensure long-term stable operation.

[0003] Currently, traditional high-temperature molten salt pumps typically employ a single-casing centrifugal structure. The pump body and impeller are made of heat-resistant alloys to resist high-temperature corrosion. The motor and pump shaft are directly connected via a rigid coupling. High-temperature mechanical seals or packing seals are used to prevent molten salt leakage. The bearing system is mostly lubricated with high-temperature grease or oil, and the temperature rise is reduced through natural heat dissipation or external air cooling. In addition, some designs add an insulation layer to the outside of the pump casing to reduce heat loss and maintain the fluidity of the molten salt.

[0004] However, the above structure has a significant drawback: high-temperature heat is continuously conducted to the motor end through the metal pump shaft, causing the motor windings and bearings to exceed the temperature limit. Long-term operation of the motor at high temperatures will accelerate insulation aging, lubrication failure, and even cause magnet demagnetization, which will seriously shorten the equipment life and increase the risk of failure. This problem is particularly prominent in small flow pumps because their shaft diameter is smaller and their thermal resistance is lower, making it easier to form an efficient heat conduction path. Therefore, a small flow high-temperature molten salt pump is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a small-flow high-temperature molten salt pump, which aims to solve the problem of motor overheating caused by heat conduction of the pump shaft in existing high-temperature molten salt pumps, thereby extending the motor life and improving system reliability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A small-flow-rate high-temperature molten salt pump includes a pump body, a pump shaft is slidably connected inside the pump body, and a partition assembly is provided on the outer wall of the pump shaft.

[0008] The partition assembly includes a hollow ring one and a hollow ring two, both of which are slidably connected to the outer wall of the pump shaft. Both hollow rings are filled with heat-conducting oil. A connecting block is fixedly connected to one side of hollow ring one, and a liquid storage tank is fixedly connected to one side of the connecting block. A miniature fan is installed on one side of the liquid storage tank. A circulating pump is fixedly connected to the top of the liquid storage tank, and a connecting barrel is fixedly connected to the top of the liquid storage tank. The input end of the circulating pump is fixedly connected to the inside of the liquid storage tank, and the output end of the circulating pump is fixedly connected to the inside of hollow ring one. A connecting pipe is fixedly connected inside the connecting barrel, and one end of the connecting pipe is fixedly connected to the inside of hollow ring one. Symmetrical disassembly and assembly components are provided on the side walls of hollow ring one and hollow ring two.

[0009] As a further description of the above technical solution:

[0010] The symmetrical assembly and disassembly components include a first fixing block and a second fixing block. The first fixing block is fixedly connected to one side wall of the hollow ring, and the second fixing block is fixedly connected to one side wall of the hollow ring.

[0011] As a further description of the above technical solution:

[0012] A sealing ring is fixedly connected to one side of the hollow ring, and one side of the sealing ring is in contact with one side of the hollow ring.

[0013] As a further description of the above technical solution:

[0014] The second fixing block has a slot inside, and the first fixing block has a support block fixedly connected inside.

[0015] As a further description of the above technical solution:

[0016] A support shaft is fixedly connected to one side of the support block, and the outer wall of the support shaft is slidably connected to the inner wall of the fixed block.

[0017] As a further description of the above technical solution:

[0018] The support block has a drive shaft that is slidably connected inside, and a pull block is fixedly connected to one end of the drive shaft.

[0019] As a further description of the above technical solution:

[0020] A tapered block is fixedly connected to the other end of the drive shaft, and a limiting ball is slidably connected inside the support shaft, with the limiting ball contacting the outer wall of the tapered block.

[0021] As a further description of the above technical solution:

[0022] The bottom end of the conical block is fixedly connected to a limiting disk, and a spring is provided on the outer wall of the transmission shaft. One end of the spring is fixedly connected to the inner wall of the support block, and the other end is fixedly connected to the side wall of the conical block.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the operator first injects heat transfer oil into the hollow ring one and hollow ring two, and then circulates the heat transfer oil through the output and input ends of the circulation pump. The micro fan can efficiently dissipate heat from the heat transfer oil, thereby achieving the effect of isolating heat transfer. This solves the problem of insulation aging and lubrication failure caused by overheating of the motor, and improves the operational stability of the equipment.

[0025] 2. In this utility model, the sealing ring ensures the sealing performance. By pulling the pull block, the transmission shaft slides inside the support block, thereby further driving the conical block to move. After the conical block moves, the limiting ball will be released, allowing the limiting ball to disengage from the slot to unlock. This achieves the effect of quick disassembly and assembly of hollow ring one and hollow ring two, solving the problem of difficult maintenance caused by the inability to quickly disassemble and assemble the partition components, and improving the maintenance efficiency and flexibility of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a small-flow-rate high-temperature molten salt pump proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the top structure of the pump body of a small-flow high-temperature molten salt pump proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the hollow ring outer wall of a small-flow-rate high-temperature molten salt pump proposed in this utility model;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Pump body; 2. Pump shaft; 3. Hollow ring one; 4. Hollow ring two; 5. Connecting block; 6. Liquid storage tank; 7. Miniature fan; 8. Circulating pump; 9. Connecting barrel; 10. Connecting pipe; 11. Fixing block one; 12. Fixing block two; 13. Sealing ring; 14. Slot; 15. Support block; 16. Support shaft; 17. Drive shaft; 18. Pull block; 19. Conical block; 20. Limiting ball; 21. Limiting disc; 22. Spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 - Figure 3 An embodiment of this utility model is provided: a small flow high temperature molten salt pump, including a pump body 1, a pump shaft 2 slidably connected inside the pump body 1, and an isolation component provided on the outer wall of the pump shaft 2. The isolation component is used to prevent further heat conduction, thereby protecting the motor and preventing the motor from reducing its working efficiency due to high temperature.

[0034] The partition assembly includes a hollow ring 3 and a hollow ring 4, both of which are slidably connected to the outer wall of the pump shaft 2. Both hollow rings 3 and 4 are filled with heat-conducting oil, which absorbs heat and effectively blocks heat conduction. A connecting block 5 is fixedly connected to one side of hollow ring 3, and a liquid storage tank 6 is fixedly connected to one side of connecting block 5. The liquid storage tank 6 stores the heat-conducting oil, providing a storage space and facilitating heat dissipation by a miniature fan 7. A miniature fan 7 is installed on one side of the liquid storage tank 6, which agitates the airflow to further dissipate heat from the heat-conducting oil inside the liquid storage tank 6, achieving efficient cooling of the oil and ensuring the partition... To improve the capacity, a circulation pump 8 is fixedly connected to the top of the liquid storage tank 6. The function of the circulation pump 8 is to drive the heat transfer oil to circulate, so that the heat transfer oil can flow and ensure the efficiency of heat absorption. A connecting barrel 9 is fixedly connected to the top of the liquid storage tank 6. The input end of the circulation pump 8 is fixedly connected to the inside of the liquid storage tank 6, and the output end of the circulation pump 8 is fixedly connected to the inside of the hollow ring 3. A connecting pipe 10 is fixedly connected to the inside of the connecting barrel 9. The function of the connecting pipe 10 is to provide accurate guidance for the heat transfer oil. One end of the connecting pipe 10 is fixedly connected to the inside of the hollow ring 3. The side walls of the hollow ring 3 and the hollow ring 4 are provided with symmetrical disassembly and assembly components. The disassembly and assembly components are used to facilitate the maintenance and adjustment of the partition components by the operators.

[0035] Specifically, when the operating temperature of the high-temperature molten salt pump exceeds the motor's tolerance limit or axial heat conduction causes the motor bearings and windings to overheat, in order to prevent high temperature from being conducted to the motor and affecting its service life, the operator tightly fits hollow ring 3 and hollow ring 4 against the outer wall of the pump shaft 2. In this way, hollow ring 3 and hollow ring 4 form an effective heat insulation barrier, preventing heat from being directly conducted to the motor. To enhance the heat insulation effect, the heat-conducting oil inside the storage tank 6 is extracted through the input end of the circulating pump 8 and introduced into the hollow ring 3 and hollow ring 4 through the output end of the storage tank 6. Inside the second core ring 4, as the heat transfer oil flows within the first core ring 3 and the second core ring 4, it absorbs and carries away heat, effectively blocking the transfer of heat to the motor. Simultaneously, under the action of the circulating pump 8, the heat transfer oil is guided back to the storage tank 6 through the connecting pipe 10 and the connecting barrel 9, ensuring the continuous circulation of the heat transfer oil. During this process, the micro fan 7 continuously cools the heat transfer oil inside the storage tank 6, enhancing the heat absorption capacity of the heat transfer oil and ensuring that it continues to play a heat dissipation role during circulation, further enhancing the thermal insulation effect.

[0036] Reference Figure 3 and Figure 4 The symmetrical assembly includes a first fixing block 11 and a second fixing block 12. One side of the first fixing block 11 is fixedly connected to the side wall of the second hollow ring 4, and one side of the second fixing block 12 is fixedly connected to the side wall of the first hollow ring 3. The function of the first fixing block 11 and the second fixing block 12 in the assembly is to provide stable support and connection for the assembly and ensure the stability of the assembly's movement. A sealing ring 13 is fixedly connected to one side of the first hollow ring 3. The function of the sealing ring 13 is to provide a seal for the assembly and prevent leakage of heat transfer oil. One side of the sealing ring 13 fits against one side of the second hollow ring 4. A slot 14 is opened inside the second fixing block 12. The function of the slot 14 is to cooperate with other components to realize the quick locking and unlocking function of the assembly, so that the operator can make timely adjustments to the assembly. A support block 15 is fixedly connected inside the first fixing block 11. A support shaft 16 is fixedly connected to one side of the support block 15. The outer wall of the support shaft 16 is slidably connected to the inner wall of the second fixing block 12.

[0037] Specifically, when the equipment needs to be maintained, vulnerable parts replaced, or the cooling component malfunctions and the partition cooling component needs to be disassembled, the operator only needs to pull the pull block 18. Under the action of the pulling force, the drive shaft 17 slides inside the support block 15. As the drive shaft 17 slides, the tapered block 19 also slides synchronously, causing the limit ball 20 to lose its constraint. Thus, it can slide freely within a certain range inside the support shaft 16 and finally disengage from the slot 14 to unlock. This makes it easy for the operator to quickly disassemble and install the component, improving the flexibility and maintainability of the component.

[0038] Reference Figure 3 and Figure 4A drive shaft 17 is slidably connected inside the support block 15. The function of the drive shaft 17 is to further transmit force, thereby driving the movement of subsequent components. A pull block 18 is fixedly connected to one end of the drive shaft 17. The pull block 18 is made of rubber to increase the friction between the operator and the pull block 18. Through the pull block 18, the operator can quickly start the component and disassemble it without tools. A conical block 19 is fixedly connected to the other end of the drive shaft 17. The function of the conical block 19 is to compress the limiting ball 20, thereby ensuring that the limiting ball 20 does not move arbitrarily. The limiting ball 20 is slidably connected inside the support shaft 16. The limiting ball 20 is in contact with the outer wall of the conical block 19. A limiting plate 21 is fixedly connected to the bottom end of the conical block 19. A spring 22 is provided on the outer wall of the drive shaft 17. The function of the spring 22 is to provide elastic restoring force for the component, ensuring that the component can quickly return to its original position after movement, thereby ensuring the stability of the component's movement. One end of the spring 22 is fixedly connected to the inner wall of the support block 15, and the other end is fixedly connected to the side wall of the conical block 19.

[0039] Specifically, at the same time, the movement of the cone block 19 will compress the spring 22, causing the spring 22 to undergo elastic deformation, storing elastic potential energy, and forming elastic support for the component. This not only ensures the stable movement of the component, but also effectively absorbs the impact force from the operation process, further enhancing the stability and durability of the device. As a result, the molten salt pump can achieve efficient thermal isolation and stable operation of the component in a high-temperature working environment, ensuring long-term stable operation of the equipment.

[0040] Working Principle: During the use of this molten salt pump, to prevent high temperatures from being conducted to the motor and affecting its service life, the operator presses hollow ring 3 and hollow ring 4 against the outer wall of the pump shaft 2. After pressing, the heat transfer oil inside the storage tank 6 is drawn out through the input end of the circulating pump 8 and introduced into the hollow rings 3 and 4 through the output end of the storage tank 6. The heat transfer oil absorbs the heat, thus isolating heat transfer and preventing heat from being conducted to the motor. Under the action of the input end of the circulating pump 8, the heat transfer oil is guided back into the storage tank 6 through the connecting pipe 10 and the connecting barrel 9. The micro fan 7 continuously cools the heat transfer oil inside the storage tank 6, thereby ensuring the heat absorption effect of the heat transfer oil and achieving circulating heat dissipation and isolation. When maintenance of the isolation component is required, the operator pulls the pull block 18, causing the drive shaft 17 to slide inside the support block 15 under the pulling force. The sliding action of the drive shaft 17 drives the conical block 19 to slide synchronously. After the conical block 19 moves, the limit ball 20 is no longer constrained, thus releasing the limit ball 20. This allows the limit ball 20 to slide within a certain range inside the support shaft 16, thereby disengaging from the slot 14 and unlocking it. After unlocking, it is convenient for the operator to quickly disassemble and assemble the component, ensuring the flexibility of the component. Simultaneously, when the conical block 19 moves, it will compress the spring 22, causing the spring 22 to undergo elastic deformation, thereby storing elastic potential energy and providing elastic support for the component, ensuring the stable movement of the component.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-flow-rate high-temperature molten salt pump, comprising a pump body (1), characterized in that: The pump body (1) is internally connected to a pump shaft (2), and the outer wall of the pump shaft (2) is provided with a partition assembly; The partition assembly includes a hollow ring one (3) and a hollow ring two (4). Both the hollow ring one (3) and the hollow ring two (4) are slidably connected to the outer wall of the pump shaft (2). Both the hollow ring one (3) and the hollow ring two (4) are filled with heat transfer oil. A connecting block (5) is fixedly connected to one side of the hollow ring one (3), and a liquid storage tank (6) is fixedly connected to one side of the connecting block (5). A miniature fan (7) is provided on one side of the liquid storage tank (6), and the top of the liquid storage tank (6) is fixedly connected to... There is a circulating pump (8), and a connecting barrel (9) is fixedly connected to the top of the liquid storage tank (6). The input end of the circulating pump (8) is fixedly connected to the inside of the liquid storage tank (6), and the output end of the circulating pump (8) is fixedly connected to the inside of the hollow ring one (3). A connecting pipe (10) is fixedly connected inside the connecting barrel (9). One end of the connecting pipe (10) is fixedly connected to the inside of the hollow ring one (3). The side walls of the hollow ring one (3) and the hollow ring two (4) are provided with left and right symmetrical disassembly and assembly components.

2. The low-flow-rate high-temperature molten salt pump according to claim 1, characterized in that: The symmetrical assembly and disassembly components include a first fixing block (11) and a second fixing block (12). One side of the first fixing block (11) is fixedly connected to the side wall of the second hollow ring (4), and one side of the second fixing block (12) is fixedly connected to the side wall of the first hollow ring (3).

3. The low-flow-rate high-temperature molten salt pump according to claim 2, characterized in that: A sealing ring (13) is fixedly connected to one side of the hollow ring one (3), and one side of the sealing ring (13) is in contact with one side of the hollow ring two (4).

4. A small-flow-rate high-temperature molten salt pump according to claim 3, characterized in that: The second fixing block (12) has a slot (14) inside, and the first fixing block (11) has a support block (15) fixedly connected inside.

5. A small-flow-rate high-temperature molten salt pump according to claim 4, characterized in that: A support shaft (16) is fixedly connected to one side of the support block (15), and the outer wall of the support shaft (16) is slidably connected to the inner wall of the fixed block (12).

6. A small-flow-rate high-temperature molten salt pump according to claim 5, characterized in that: The support block (15) has a drive shaft (17) slidably connected inside, and a pull block (18) is fixedly connected to one end of the drive shaft (17).

7. A small-flow-rate high-temperature molten salt pump according to claim 6, characterized in that: The other end of the drive shaft (17) is fixedly connected to a conical block (19), and a limiting ball (20) is slidably connected inside the support shaft (16), with the limiting ball (20) in contact with the outer wall of the conical block (19).

8. A small-flow-rate high-temperature molten salt pump according to claim 7, characterized in that: The bottom end of the conical block (19) is fixedly connected to a limiting disk (21), and a spring (22) is provided on the outer wall of the transmission shaft (17). One end of the spring (22) is fixedly connected to the inner wall of the support block (15), and the other end is fixedly connected to the side wall of the conical block (19).

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