A vertical multi-stage high-temperature molten salt pump

Abstract

The invention discloses a vertical multi-stage high-temperature molten salt pump, which relates to a high-temperature molten salt pump, comprising a molten salt pump main body with a bottom plate fixedly installed at the bottom, the bottom of the bottom plate is connected to a base, and a distance is left between the bottom plate and the base; the invention tightly fits the sealing ring with the smooth top of the tank body, and by turning on the motor, the rotating shaft can drive the turntable to rotate and the rotating member can drive the first piston to slide back and forth in the cavity, and at the same time, the air between the tank body and the negative pressure groove will be sucked into the cavity through the one-way air inlet valve and discharged out of the cavity through the one-way exhaust valve, so that negative pressure can be generated between the negative pressure groove and the tank body, and the molten salt pump main body, the bottom plate and the base are firmly positioned on the top of the tank body by using atmospheric pressure, and by turning on the solenoid valve, the outside air can enter the negative pressure groove to balance the atmospheric pressure, so that the high-temperature molten salt pump can be released from the positioning, achieving the effect of bolt-free disassembly and assembly, and providing great convenience for installers or maintenance personnel.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature molten salt pumps, in particular to a vertical multi-stage high-temperature molten salt pump. Background Art

[0002] Vertical multi-stage high-temperature molten salt pump is a pump specially used for conveying high-temperature molten salt. The design features of this pump enable it to operate stably in high-temperature environments. It is suitable for fields such as petrochemicals, metallurgy, ships, and marine engineering, especially for occasions that require handling high-temperature, high-pressure, and corrosive media. The working principle of the vertical multi-stage high-temperature molten salt pump is based on rotational dynamics and special liquid media inside the pump body. Its working steps usually include the molten salt liquid entering the pump body, the pump impeller rotating to generate centrifugal force, and the liquid being conveyed to the required system. This pump has the characteristics of high temperature adaptability, material tolerance, good sealing performance, and high efficiency and energy saving.

[0003] In order to facilitate the extraction and transportation of high-temperature molten salt in the storage tank, the existing vertical multi-stage high-temperature molten salt pump usually installs the high-temperature molten salt pump directly on the storage tank through bolts and flanges, so as to facilitate the high-temperature molten salt pump to extract the molten salt in the tank and transport it. Although the above-mentioned bolt and flange installation method is relatively convenient, the tank body containing molten salt is usually placed in the outside world, which makes the bolts exposed to the outside world for a long time and will adhere to rainwater or the surrounding working environment is humid, causing rust problems. The rusted bolts are difficult to remove, making it inconvenient for personnel to regularly disassemble the high-temperature molten salt pump for maintenance or adjust the working position of the pump body.

[0004] To this end, we designed a vertical multi-stage high-temperature molten salt pump to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a vertical multi-stage high-temperature molten salt pump to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides a vertical multi-stage high-temperature molten salt pump, comprising a molten salt pump body with a bottom plate fixedly installed at the bottom, the bottom of the bottom plate is connected to a base, the bottom of the bottom plate is spaced apart from the base, a negative pressure groove is provided at the bottom of the base, an air collecting duct and a cavity are provided in the base, the air collecting duct and the cavity are connected, a one-way air inlet valve and a one-way exhaust valve are inlaid in the air collecting duct, the one-way exhaust valve is located on one side of the one-way air inlet valve and is connected to the outside of the base, a first piston is slidably connected in the cavity, a rotating shaft is also rotatably connected in the cavity, a turntable is fixedly sleeved on the rotating shaft, a motor is fixedly installed in the cavity, a driving shaft of the motor is transmission-connected to one end of the rotating shaft, a space is left between the turntable and the first piston and they are connected, an exhaust hole is provided on one side of the base, the exhaust hole is connected to the cavity, a sealing ring is fixedly installed at the bottom of the base, an electromagnetic valve is provided on the front side of the base, the electromagnetic valve is connected to the negative pressure groove, and is used to introduce outside air into the negative pressure groove.

[0007] Furthermore, a transmission shaft is fixedly installed on the front side of the turntable, a rotating member is rotatably sleeved on the transmission shaft, a mounting seat is fixedly installed on one side of the first piston, and the other end of the rotating member is rotatably connected in the mounting seat.

[0008] Furthermore, a pin is fixedly installed in the mounting seat, and the side of the rotating member away from the transmission shaft is rotatably sleeved on the pin.

[0009] Furthermore, a threaded screw is rotatably connected in the negative pressure groove, a nut is threadedly sleeved on the threaded screw, a motor is embedded in the base, a driving shaft of the motor is transmission-connected to one end of the threaded screw, a guide rod is inserted in the nut, both ends of the guide rod are fixedly installed in the negative pressure groove, a limiting piece is installed at the bottom of the nut, a first spring and a piston rod are provided at the bottom of the limiting piece, a cleaning box is fixedly installed at the other end of the first spring and the piston rod, a connecting rod is slidably inserted at the front and back sides of the cleaning box, a metal plate and a wiping piece are fixedly installed at both ends of the connecting rod, the metal plate is slidably connected in the cleaning box, a wiping cotton is fixedly installed at the bottom of the wiping piece, a second spring is provided on one side of the metal plate, and the other end of the second spring is fixedly installed on the inner side wall of the cleaning box, an electromagnet is fixedly installed at the center position of the cleaning box, the electromagnet is magnetically connected to the metal plate, a battery is embedded in the limiting piece, and the battery is electrically connected to the electromagnet.

[0010] Furthermore, two electric push rods are symmetrically embedded in the base, a stop block is provided at the driving end of the electric push rod, a placement groove is provided at the bottom of the base, and the stop block cooperates with the placement groove and is slidably connected in the placement groove.

[0011] Furthermore, a buffer groove is provided at the top of the base, the buffer groove is communicated with the one-way exhaust valve and a buffer plate is slidably connected therein, a support column is provided on the top of the buffer plate, the other end of the support column is fixedly connected to the bottom of the base plate, a limit assembly is installed in the buffer groove, and the limit assembly is against the top of the buffer plate.

[0012] Furthermore, the limiting assembly includes two stoppers, which are symmetrically mounted on the top of the inner wall of the buffer groove, and the stoppers cooperate with the buffer plate to abut against each other.

[0013] Furthermore, a controller is provided on the front side of the base, and the controller is electrically connected to the motor, the motor, the electromagnet, the battery and the electric push rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The sealing ring is tightly fitted to the smooth top of the tank body, and by turning on the motor, the rotating shaft can drive the turntable to rotate and the rotating member can drive the first piston to slide back and forth in the cavity. At the same time, the air between the tank body and the negative pressure groove is sucked into the cavity through the one-way air inlet valve and discharged out of the cavity through the one-way exhaust valve, so that negative pressure can be generated between the negative pressure groove and the tank body. The atmospheric pressure is used to firmly position the molten salt pump body, the bottom plate and the base on the top of the tank body. By opening the solenoid valve, the outside air can enter the negative pressure groove to balance the atmospheric pressure, and the high-temperature molten salt pump can be released from the position, achieving the effect of bolt-free disassembly and assembly, which provides great convenience for installers or maintenance personnel;

[0015] 2. Before positioning the pump body, by turning on the electric push rod, the stop block can be moved downward and the base can be lifted up, and then the electromagnet is turned off. At this time, the second spring will pull the metal plate back and make the two connecting rods drive the wiping cotton to move in opposite directions. At this time, the wiping cotton is just below the four edges of the sealing ring and the wiping cotton is attached to the top of the tank body due to the thrust of the first spring. Then, by turning on the motor, the threaded screw can be rotated, so that the nut drives the limiter and the wiping cotton to move and wipe the top of the tank body, which can wipe the dust on the top of the tank body to prevent the dust from affecting the sealing performance of the sealing ring and the surface of the tank body, thereby improving the stability of the positioning of the high-temperature molten salt pump;

[0016] 3. Since the molten salt pump body will vibrate due to its own operation and the extraction of molten salt during use, when the air between the tank body and the negative pressure tank is extracted, the air will eventually be discharged into the buffer tank through the one-way exhaust valve, and then the air will push the buffer plate upward and resist against the baffle. As a result, when the molten salt pump body vibrates, the buffer plate can move downward to compress the air below to achieve a buffering effect, thereby avoiding the molten salt pump body from generating a pulling force on the base due to vibration, which affects the stability of the base during positioning, and can further improve the positioning effect, making this high-temperature molten salt pump not only easy to disassemble and assemble, but also stable in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall exterior of the present invention;

[0018] Figure 2 It is a schematic diagram of a three-dimensional structure of a half-section view of the interior of the base of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the base of the present invention when viewed from above and half-cut inside;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the exterior of the cleaning box of the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the interior of the cleaning box of the present invention in a half-sectioned side view;

[0022] Figure 6 For the present invention Figure 2 The enlarged view of point A in the middle;

[0023] Figure 7 For the present invention Figure 4 Enlarged view of point B in the middle.

[0024] In the figure: 1. molten salt pump body; 2. bottom plate; 3. base; 4. negative pressure groove; 5. air collecting channel; 6. one-way air inlet valve; 7. one-way exhaust valve; 8. first piston; 9. rotating shaft; 10. turntable; 11. motor; 12. exhaust hole; 13. transmission shaft; 14. rotating part; 15. mounting seat; 16. threaded screw; 17. nut; 18. motor; 19. guide rod; 20. limiter; 21. first spring; 22. piston rod; 23. cleaning box; 24. connecting rod; 25. metal plate; 26. wiping part; 27. wiping cotton; 28. second spring; 29. ​​electromagnet; 30. battery; 31. electric push rod; 32. block; 33. buffer groove; 34. buffer plate; 35. support column; 36. stopper; 37. solenoid valve. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-7The present invention provides a technical solution: a vertical multi-stage high-temperature molten salt pump, comprising a molten salt pump body 1 with a bottom plate 2 fixedly installed at the bottom, a base 3 connected to the bottom of the bottom plate 2, a spacing between the bottom plate 2 and the base 3, a negative pressure groove 4 at the bottom of the base 3, an air collecting channel 5 and a cavity are provided in the base 3, the air collecting channel 5 and the cavity are connected, a one-way air inlet valve 6 and a one-way exhaust valve 7 are embedded in the air collecting channel 5, the one-way exhaust valve 7 is located on one side of the one-way air inlet valve 6 and is connected to the outside of the base 3, and a first piston is slidably connected in the cavity 8, a rotating shaft 9 is also rotatably connected in the cavity, a rotating disk 10 is fixedly sleeved on the rotating shaft 9, a motor 11 is fixedly installed in the cavity, a driving shaft of the motor 11 is transmission-connected to one end of the rotating shaft 9, a spacing is left between the rotating disk 10 and the first piston 8, and the rotating disk 10 is connected to the first piston 8, an exhaust hole 12 is opened on one side of the base 3, the exhaust hole 12 is connected to the cavity, a sealing ring is fixedly installed at the bottom of the base 3, and an electromagnetic valve 37 is arranged on the front side of the base 3, and the electromagnetic valve 37 is connected to the negative pressure groove 4, and is used to introduce external air into the negative pressure groove 4;

[0027] A transmission shaft 13 is fixedly installed on the front side of the turntable 10, and a rotating member 14 is rotatably sleeved on the transmission shaft 13. A mounting seat 15 is fixedly installed on one side of the first piston 8, and the other end of the rotating member 14 is rotatably connected in the mounting seat 15. A pin is fixedly installed in the mounting seat 15, and the side of the rotating member 14 away from the transmission shaft 13 is rotatably sleeved on the pin.

[0028] During the specific implementation, the molten salt pump body 1 is placed at a smooth position on the top of the tank body filled with molten salt, and the sealing ring is tightly fitted with the smooth top of the tank body, and then the motor 11 is turned on to make the rotating shaft 9 drive the turntable 10 to rotate. In this process, the rotating member 14 will drive the first piston 8 to slide back and forth in the cavity. At the same time, the air between the tank body and the negative pressure groove 4 will be sucked into the cavity through the one-way air inlet valve 6, and then discharged out of the cavity through the one-way exhaust valve 7, so that negative pressure can be generated between the negative pressure groove 4 and the tank body, and the molten salt pump body 1, the bottom plate 2 and the base 3 are firmly positioned on the top of the tank body by atmospheric pressure. When the molten salt pump body 1, the bottom plate 2 and the base 3 need to be removed from the tank body, the solenoid valve 37 is opened, and the outside air enters the negative pressure groove 4 at this time to balance the atmospheric pressure, so that the high-temperature molten salt pump can be released from the position, achieving the effect of bolt-free disassembly and assembly, which provides great convenience for installers or maintenance personnel.

[0029] See also Figure 1-7As shown, a threaded screw 16 is rotatably connected in the negative pressure groove 4, a nut 17 is threadedly sleeved on the threaded screw 16, a motor 18 is embedded in the base 3, a driving shaft of the motor 18 is transmission-connected to one end of the threaded screw 16, a guide rod 19 is inserted in the nut 17, both ends of the guide rod 19 are fixedly installed in the negative pressure groove 4, a limiting member 20 is installed at the bottom of the nut 17, a first spring 21 and a piston rod 22 are arranged at the bottom of the limiting member 20, a cleaning box 23 is fixedly installed at the other end of the first spring 21 and the piston rod 22, a connecting rod 24 is slidably inserted at the front and rear sides of the cleaning box 23, and a metal plate 25 and a wiping member 25 are fixedly installed at both ends of the connecting rod 24. 6. The metal plate 25 is slidably connected in the cleaning box 23. A wiping cotton 27 is fixedly installed at the bottom of the wiping member 26. A second spring 28 is provided on one side of the metal plate 25. The other end of the second spring 28 is fixedly installed on the inner wall of the cleaning box 23. An electromagnet 29 is fixedly installed at the center position of the cleaning box 23. The electromagnet 29 is magnetically connected to the metal plate 25. A battery 30 is embedded in the limit member 20. The battery 30 is electrically connected to the electromagnet 29. Two electric push rods 31 are symmetrically embedded in the base 3. A stop block 32 is provided at the driving end of the electric push rod 31. A placement groove is provided at the bottom of the base 3. The stop block 32 is slidably connected to the placement groove in cooperation with the placement groove.

[0030] During specific implementation, on the basis of the above implementation, before the sealing ring abuts against the top of the tank body, the electric push rod 31 is first turned on, so that the driving end of the electric push rod 31 is extended to drive the abutment block 32 to move downward and lift the base 3, and then the electromagnet 29 is turned off. At this time, the electromagnet 29 is powered off and the magnetic force disappears. Then the second spring 28 will pull the metal plate 25 back due to its own elastic force, and make the two connecting rods 24 drive the wiping cotton 27 to move in opposite directions. At this time, the wiping cotton 27 is just below the four edges of the sealing ring, and the wiping cotton 27 is attached to the top of the tank body due to the thrust of the first spring 21. Then the motor 18 is turned on to make the threaded screw 16 rotate, so that the nut 17 drives the limiter 20 and the wiping cotton 27 to move and wipe the top of the tank body, so that the dust on the top of the tank body can be wiped off to prevent the dust from affecting the sealing of the sealing ring and the surface of the tank body, thereby improving the positioning stability of the high-temperature molten salt pump.

[0031] See also Figure 1-7 A buffer groove 33 is provided at the top of the base 3, the buffer groove 33 is communicated with the one-way exhaust valve 7 and a buffer plate 34 is slidably connected therein, a support column 35 is provided on the top of the buffer plate 34, and the other end of the support column 35 is fixedly connected to the bottom of the base plate 2, and a limit assembly is installed in the buffer groove 33, and the limit assembly is abutted against the top of the buffer plate 34. The limit assembly includes two stoppers 36, and the two stoppers 36 are symmetrically installed on the top of the inner wall of the buffer groove 33, and the stoppers 36 cooperate with the buffer plate 34 to abut against each other.

[0032] In specific implementation, on the basis of the above implementation, since the molten salt pump body 1 will vibrate due to its own operation and the extraction of molten salt during use, when the air between the tank body and the negative pressure tank 4 is extracted, the air will eventually be discharged into the buffer tank 33 through the one-way exhaust valve 7, and then the air will push the buffer plate 34 upward and resist against the baffle 36, so that when the molten salt pump body 1 vibrates, the buffer plate 34 can move downward to compress the air below to achieve a buffering effect, thereby avoiding the molten salt pump body 1 from generating a pulling force on the base 3 due to vibration, which affects the stability of the base 3 when it is positioned, and can further improve the positioning effect, so that this high-temperature molten salt pump is not only convenient for disassembly and assembly, but also can operate stably.

[0033] See also Figure 1-7 A controller is provided on the front side of the base 3, and the controller is electrically connected to the motor 11, the motor 18, the electromagnet 29, the battery 30 and the electric push rod 31. A person can send an electrical signal to the motor 11, the motor 18, the electromagnet 29, the battery 30 and the electric push rod 31 by operating the controller, so that the person can conveniently control the switch and operation status of the motor 11, the motor 18, the electromagnet 29, the battery 30 and the electric push rod 31.

[0034] In addition, the molten salt pump body 1 is mainly used for the transportation of high-temperature molten salt fluids, and its working principle is mainly based on rotational dynamics and special liquid media inside the pump body. High-temperature molten salt is usually potassium saltpeter or lithium chloride, etc., provided by a heat storage system or a reactor, and enters the pump body. The motor or other power source drives the impeller in the pump to rotate, so that the high-temperature molten salt material is sucked from the inlet pipe, and after being compressed by multiple stages of impellers, the pressure gradually increases, and finally discharged from the outlet pipe. Since the internal structure of the molten salt pump body 1 is all prior art, it will not be described in detail in this specification.

[0035] Working principle: when in use, firstly, the electrical appliances on the high-temperature molten salt pump are connected to an external power supply, and then the molten salt pump body 1 is placed in a smooth position on the top of the tank body filled with molten salt, and the sealing ring is tightly fitted with the smooth top of the tank body, and then the motor 11 is turned on to make the rotating shaft 9 drive the turntable 10 to rotate. In this process, the rotating member 14 will drive the first piston 8 to slide back and forth in the cavity. At the same time, the air between the tank body and the negative pressure groove 4 will be sucked into the cavity through the one-way air inlet valve 6, and then discharged out of the cavity through the one-way exhaust valve 7, so that negative pressure can be generated between the negative pressure groove 4 and the tank body. The molten salt pump body 1, the bottom plate 2 and the base 3 are firmly positioned on the top of the tank body by atmospheric pressure. When the molten salt pump body 1, the bottom plate 2 and the base 3 need to be removed from the tank body, the solenoid valve 37 is opened. At this time, the outside air enters the negative pressure groove 4 to balance the atmospheric pressure, and the high-temperature molten salt pump can be released from the position, achieving the effect of bolt-free disassembly and assembly, which provides great convenience for installers or maintenance personnel;

[0036] In addition, before the sealing ring abuts against the top of the tank body, the electric push rod 31 is first turned on, so that the driving end of the electric push rod 31 is extended to drive the abutment block 32 to move downward and lift the base 3, and then the electromagnet 29 is turned off. At this time, the electromagnet 29 is powered off and the magnetic force disappears. Then the second spring 28 will pull the metal plate 25 back due to its own elastic force, and the two connecting rods 24 drive the wiping cotton 27 to move in opposite directions. At this time, the wiping cotton 27 is just below the four edges of the sealing ring, and the wiping cotton 27 is attached to the top of the tank body due to the thrust of the first spring 21. Then the motor 18 is turned on to rotate the threaded screw 16, so that the nut 17 drives the limiter 20 and the wiping cotton 27 to move and wipe the top of the tank body, so that the dust on the top of the tank body can be wiped off to prevent the dust from affecting the sealing performance of the sealing ring and the surface of the tank body, thereby improving the positioning stability of the high-temperature molten salt pump;

[0037] In addition, it should be noted that since the molten salt pump body 1 will vibrate due to its own operation and the extraction of molten salt during use, when the air between the tank body and the negative pressure tank 4 is extracted, the air will eventually be discharged into the buffer tank 33 through the one-way exhaust valve 7, and then the air will push the buffer plate 34 upward and resist against the baffle 36, so that when the molten salt pump body 1 vibrates, the buffer plate 34 can move downward to compress the air below to achieve a buffering effect, thereby avoiding the molten salt pump body 1 from generating a pulling force on the base 3 due to vibration, which affects the stability of the base 3 when it is positioned, and can further improve the positioning effect, so that this high-temperature molten salt pump is not only convenient for disassembly and assembly, but also can operate stably.

Claims

1. A vertical multi-stage high-temperature molten salt pump, comprising a molten salt pump body (1) with a bottom plate (2) fixedly mounted at the bottom, characterized in that: The bottom of the bottom plate (2) is connected to a base (3), a distance is left between the bottom plate (2) and the base (3), a negative pressure groove (4) is provided at the bottom of the base (3), an air collecting channel (5) and a cavity are provided in the base (3), the air collecting channel (5) and the cavity are communicated, a one-way air intake valve (6) and a one-way air exhaust valve (7) are embedded in the air collecting channel (5), the one-way air exhaust valve (7) is located on one side of the one-way air intake valve (6) and is communicated with the outside of the base (3), a first piston (8) is slidably connected in the cavity, a rotating shaft (9) is also rotatably connected in the cavity, and the rotating shaft (9) is fixedly sleeved with a turntable (10), a motor (11) is fixedly installed in the cavity, a driving shaft of the motor (11) is drivingly connected to one end of the rotating shaft (9), a spacing is left between the turntable (10) and the first piston (8) and they are connected, an exhaust hole (12) is opened on one side of the base (3), the exhaust hole (12) is connected to the cavity, a sealing ring is fixedly installed at the bottom of the base (3), and an electromagnetic valve (37) is arranged on the front side of the base (3), the electromagnetic valve (37) is connected to the negative pressure groove (4), and is used to introduce external air into the negative pressure groove (4); A transmission shaft (13) is fixedly mounted on the front side of the rotating disk (10), a rotating member (14) is rotatably sleeved on the transmission shaft (13), a mounting seat (15) is fixedly mounted on one side of the first piston (8), and the other end of the rotating member (14) is rotatably connected in the mounting seat (15); A pin is fixedly mounted in the mounting seat (15), and a side of the rotating member (14) away from the transmission shaft (13) is rotatably sleeved on the pin; A threaded screw (16) is rotatably connected in the negative pressure groove (4), a nut (17) is threadedly sleeved on the threaded screw (16), a motor (18) is embedded in the base (3), a driving shaft of the motor (18) is transmission-connected to one end of the threaded screw (16), a guide rod (19) is inserted in the nut (17), both ends of the guide rod (19) are fixedly mounted in the negative pressure groove (4), a limiting member (20) is installed at the bottom of the nut (17), a first spring (21) and a piston rod (22) are provided at the bottom of the limiting member (20), a cleaning box (23) is fixedly mounted on the other ends of the first spring (21) and the piston rod (22), and both front and rear sides of the cleaning box (23) are provided with a plurality of springs (21) and a plurality of pistons (22). A connecting rod (24) is slidably inserted, and a metal plate (25) and a wiping piece (26) are fixedly mounted at both ends of the connecting rod (24). The metal plate (25) is slidably connected in the cleaning box (23), and a wiping cotton (27) is fixedly mounted at the bottom of the wiping piece (26). A second spring (28) is provided on one side of the metal plate (25), and the other end of the second spring (28) is fixedly mounted on the inner wall of the cleaning box (23). An electromagnet (29) is fixedly mounted at the center position of the cleaning box (23), and the electromagnet (29) is magnetically connected to the metal plate (25). A storage battery (30) is embedded in the limiting piece (20), and the storage battery (30) is electrically connected to the electromagnet (29).

2. A vertical multi-stage high-temperature molten salt pump according to claim 1, characterized in that: Two electric push rods (31) are symmetrically embedded in the base (3), a driving end of the electric push rod (31) is provided with a stop block (32), a bottom of the base (3) is provided with a placement groove, and the stop block (32) cooperates with the placement groove and is slidably connected in the placement groove.

3. A vertical multi-stage high-temperature molten salt pump as claimed in claim 2, characterized in that: A buffer groove (33) is provided on the top of the base (3), the buffer groove (33) is communicated with the one-way exhaust valve (7) and a buffer plate (34) is slidably connected therein, a support column (35) is provided on the top of the buffer plate (34), the other end of the support column (35) is fixedly connected to the bottom of the base plate (2), a limit assembly is installed in the buffer groove (33), and the limit assembly abuts against the top of the buffer plate (34).

4. A vertical multi-stage high-temperature molten salt pump as claimed in claim 3, characterized in that: The limiting assembly comprises two stoppers (36), the two stoppers (36) being symmetrically mounted on the top of the inner side wall of the buffer groove (33), and the stoppers (36) and the buffer plate (34) being matched and abutted against each other.

5. A vertical multi-stage high-temperature molten salt pump as claimed in claim 4, characterized in that: A controller is provided on the front side of the base (3), and the controller is electrically connected to the motor (11), the motor (18), the electromagnet (29), the battery (30), and the electric push rod (31).

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