Vertical sand pump

Abstract

The invention provides a vertical sand pump, and relates to the technical field of pump equipment, the vertical sand pump comprises a motor, the lower end face of the motor is connected with four groups of supporting rods, and the other ends of the supporting rods are connected with a bottom plate; the water conveying mechanism comprises a volute, the side wall of the volute is connected with a water outlet pipe, a throwing-out wheel is rotationally connected into the volute, the lower end face of the throwing-out wheel is connected with a pushing wheel, and the pushing wheel is also rotationally connected with the inner side of the volute; the vertical sand pump further comprises a balance mechanism, the balance mechanism comprises a shell, the upper end face of the shell is fixedly connected with the lower end face of the volute, the lower end face of the shell is connected with a base, multiple sets of water inlet grooves are formed in the outer side wall of the shell, and middle rods are arranged between the water inlet grooves. The problem that a traditional sand pump lacks self-adaptive adjusting capacity when the sand content changes suddenly is solved, and dynamic balance of high-sand-content water flow is achieved.

Description

Technical Field

[0001] This invention relates to the field of pump equipment technology, and more specifically, to a vertical sand pump. Background Technology

[0002] In existing technologies, vertical sand pumps, as fluid machinery specifically designed for conveying media containing solid particles, primarily handle liquid-solid mixtures containing solid particles such as sand, silt, and slag. They are widely used in engineering operations such as river dredging, mine drainage, tailings transportation, and dewatering of building foundation pits. However, in actual engineering applications, the sand content of the conveyed medium is not constant but exhibits dynamic fluctuations due to changes in various factors such as water source conditions, geological environment, and construction conditions. For example, in river dredging operations, the sand content may suddenly increase from a dozen percent to over forty percent when the dredging vessel excavates different soil layers. The traditional design concept of vertical sand pumps is basically optimized according to a fixed rated operating condition parameter, with the pump body structure, impeller profile, and speed set... The key parameters for fixed-condition operation are determined for sand-water mixtures within a specific concentration range. This fixed-condition design makes the sand pump lack adaptive adjustment capabilities and balancing buffer mechanisms when facing complex operating conditions with large fluctuations in sand content. When the sand content of the conveyed medium changes slowly within the normal range, the sand pump can still maintain a basic working state. However, when a high-concentration sand-water mixture with a sand content significantly higher than the design value suddenly arrives, the sand pump itself does not have the function of identifying the concentration, distributing the flow, or buffering and balancing the sand-water mixture entering the pump body. It can only passively suck all the high-sand-content mixture into the pump body for transportation. The large amount of solid particles that rush in instantaneously will cause the fluid density in the pump body to increase sharply, the flow resistance to rise significantly, and the impeller load to increase suddenly.

[0003] Vertical sand pumps lack the ability to autonomously balance and adjust for fluctuations in sand content, leaving them to passively transport water when faced with sudden surges of high-concentration sand and water. This not only severely impacts the pump's transport efficiency and operational stability but also causes wear and damage to critical pump components, triggering a series of chain reactions of equipment failures and safety hazards. When a large volume of high-sand-water mixture suddenly floods the pump, the density of solid particles, being much greater than that of water, causes a dramatic increase in the fluid's inertial and centrifugal forces within the pump body. The resistance torque that the impeller must overcome during rotation instantly doubles, and the motor load current rapidly rises, potentially triggering overload protection and causing the pump to shut down. If the protection device does not respond promptly, it may burn out the motor windings. Simultaneously, a large number of solid particles impact the surfaces of impeller blades, pump casing inner walls, and other flow-through components at high speeds, with wear rates potentially several times higher than under normal operating conditions. These wear defects not only shorten the service life of pump components and increase maintenance and replacement costs but also lead to a decrease in the pump's volumetric and hydraulic efficiency, resulting in reduced transport capacity and severely impacting the stable operation and construction quality of the entire engineering system. Summary of the Invention

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, the present invention provides a vertical sand pump to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A vertical sand pump includes a motor with four sets of support rods connected to its lower end face, and a base plate connected to the other end of each support rod. It also includes a water conveying mechanism, comprising a volute housing with a water outlet pipe connected to its side wall. A throwing wheel is rotatably connected inside the volute housing, and a pushing wheel is connected to the lower end face of the throwing wheel, which is also rotatably connected to the inside of the volute housing. Furthermore, it includes a balancing mechanism, comprising a housing with its upper end face fixedly connected to the lower end face of the volute housing. A base is connected to the lower end face of the housing, and multiple sets of water inlet grooves are formed on the outer side wall of the housing, with intermediate rods between the water inlet grooves.

[0006] Preferably, the output end of the motor is connected to an output shaft, and a sleeve is fitted on the outside of the output shaft. One end of the sleeve is fixedly connected to the lower end face of the motor, and the other end is fixedly connected to the upper end face of the base plate. The output shaft passes through the base plate and the volute and is rotatably connected to the volute. The throwing wheel and the pushing wheel are both fixedly fitted on the output shaft.

[0007] Preferably, a connecting rod is connected to the lower end face of the output shaft, a slide bar is sleeved on the surface of the connecting rod, and a push plate is connected to the lower end face of the connecting rod.

[0008] Preferably, a conical conveying wheel is sleeved on the outer side of the connecting rod, and a groove adapted to the slide bar is opened on the inner side wall of the conical conveying wheel. The slide bar is embedded in the groove and slidably connected to it, and the conical conveying wheel is located inside the outer shell.

[0009] Preferably, the conical conveyor wheel is provided with a compression spring, and the compression spring is provided with thrust bearings at both ends. The upper thrust bearing is located between the compression spring and the conical conveyor wheel, and the lower thrust bearing is located between the compression spring and the push plate.

[0010] Preferably, each set of water inlet tanks is provided with a first actuating plate, and a first sleeve is provided at the center of the side wall of the first actuating plate. The first sleeve is sleeved on the intermediate rod and rotatably connected to the intermediate rod.

[0011] Preferably, each set of water inlet tanks is also provided with a second actuating plate, and the two ends of the side wall of the second actuating plate are provided with two sets of second sleeves, which are sleeved on the two ends of the intermediate rod and rotatably connected to the intermediate rod.

[0012] Preferably, the side wall of the first actuating plate is provided with multiple sets of first actuating plates, the side wall of the second actuating plate is provided with multiple sets of second actuating plates, and multiple sets of hinge rods are provided between the multiple sets of first actuating plates and the multiple sets of second actuating plates.

[0013] Preferably, a conical head is rotatably connected to the hinge rod, a long plate is connected to the side wall of the conical head, and a connecting sleeve is connected to the other side of the long plate.

[0014] Preferably, a centering spring is connected between the multiple sets of connecting sleeves corresponding to the first actuating plate and the multiple sets of connecting sleeves corresponding to the second actuating plate, and three sets of actuating springs are connected between the first actuating plate and the second actuating plate.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a vertical sand pump with the following advantages: The vertical sand pump solves the problem of traditional sand pumps lacking adaptive adjustment capability when facing sudden changes in sand content by using a balancing mechanism in conjunction with a multi-stage actuation buffer system. It achieves dynamic balance for water flow with high sand content. When the sand content in the transported water flow is within the normal range, the water flow pushes the first actuation plate and the second actuation plate at a normal flow rate and density as it enters the outer shell through the inlet channel. The first actuation plate and the second actuation plate swing slightly along the middle rod under the action of the water flow. The actuation spring then performs slight compression and stretching movements. The conical head swings slightly along the hinge rod and maintains a normal posture facing the outside of the outer shell with the assistance of the actuation spring. The water flow smoothly enters the inner shell through the inlet channel and is pushed upward by the conical conveying wheel to continue the conveying operation. However, when the sand content in the conveyed water suddenly increases, the overall density of the sand-water mixture increases sharply due to the addition of solid sand particles. At the same flow rate, the high-density sand-water mixture exerts a greater impact force on the first and second actuating plates than on normal water flow. This sudden change in impact force significantly increases the swing amplitude of the first and second actuating plates, and the spring amplitude of the actuating spring also increases synchronously. Simultaneously, the swing amplitude of the conical head and long plate along the hinge rod also increases accordingly. Under the coordinated large-amplitude swing action of the first and second actuating plates, the first and second actuating plates, the conical head, and the long plate, these actuating components exert a greater impact on the high-density sand... The water-mixed fluid creates a multi-layered blocking, diversion, and buffering effect, effectively extending the transition time required for the water flow density to change abruptly from a normal value to a high value. This transforms the originally instantaneous impact of high-concentration sand and water into a gradual density increase process, avoiding a sudden surge in water flow density inside the casing and an instantaneous high-load impact on the pump's internal equipment. When the water flow density returns to normal, the first and second actuating plates gradually return to a slightly stable oscillating state under the restoring force of the actuating spring. The conical head and long plate also gradually stabilize and return to their normal posture under the action of the aligning spring, improving the working stability and reliability of the sand pump when facing fluctuating sand content.

[0016] This vertical sand pump features a spring-driven conical conveyor wheel start-stop control system in conjunction with a sliding bar and groove helical transmission mechanism. When the pump is stopped, the system seals the casing opening to prevent backflow of sand and water. Upon startup, the opening opens to ensure unobstructed transport. This effectively solves the problem of sand and water backflow and accumulation causing starting difficulties and component damage in traditional vertical sand pumps after shutdown. In the stationary state when the pump is not running, the output shaft does not rotate, losing its rotational drive on the conical conveyor wheel. At this time, the spring is in a free-release state and continuously pushes the conical conveyor wheel, causing it to slide upwards. Under the continuous thrust of the spring, the conical conveyor wheel is pushed to the highest position on the upper part of the casing. During this upward movement, the sliding bar slides along the groove, driving the conical conveyor wheel to rotate and move upwards until the upper surface of the conical conveyor wheel abuts against the lower surface of the output shaft, blocking the opening at the upper end of the casing and effectively preventing external sand and water from backflowing into the pump body through the casing opening. When the motor starts up to prepare for conveying operations, the motor drives the output shaft to rotate. Due to the resistance generated by the water flow inside the casing, the conical conveying wheel does not rotate synchronously with the output shaft at the beginning of startup and remains relatively stationary. However, the output shaft has already driven the connecting rod fixedly connected to it to start rotating. The slider on the surface of the connecting rod slides relative to each other in the groove and moves downward along the spiral trajectory. This spiral transmission effect drives the conical conveying wheel to overcome the thrust of the compression spring and be forced to move downward. The upper end face of the conical conveying wheel gradually separates from the contact state with the lower end face of the output shaft. The conical conveying wheel no longer blocks the opening channel at the upper end of the casing, allowing the conveying passage to be fully opened. The compression spring is compressed and stores elastic potential energy. Afterward, the conical conveying wheel begins to rotate synchronously with the output shaft under the drive of the water flow friction and performs normal water flow pushing operations. This improves the ease of use and reliability of the sand pump and extends the service life of key components of the pump body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a vertical sand pump according to the present invention; Figure 2 In this invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a cross-sectional view of the vortex housing and the ejector wheel in this invention. Figure 4 This is a schematic diagram of the structure of the outer shell and the base in this invention; Figure 5 In this invention Figure 4 A schematic diagram of the cross-sectional structure; Figure 6 This is a schematic diagram of the structure of the first sleeve and the second sleeve in this invention; Figure 7 This is a schematic diagram of the structure of the first and second actuating plates in this invention; Figure 8This is an exploded structural diagram of the second actuating plate and the conical head in this invention; Figure 9 This is a schematic diagram of the conical conveying wheel and connecting rod in this invention; Figure 10 This is an exploded structural diagram of the slider and connecting rod in this invention.

[0018] In the diagram: 11. Motor; 12. Support rod; 13. Base plate; 14. Output shaft; 15. Sleeve; 21. Volute; 22. Water outlet pipe; 23. Throwing wheel; 24. Push wheel; 25. Connecting rod; 26. Sliding bar; 27. Push plate; 28. Conical conveyor wheel; 29. ​​Slide groove; 31. Outer shell; 32. Base; 33. Water inlet groove; 34. Intermediate rod; 35. First actuating plate; 36. First sleeve; 37. Second actuating plate; 38. Second sleeve; 39. First actuating piece; 210. Compression spring; 211. Thrust bearing; 310. Second actuating piece; 311. Hinge rod; 312. Conical head; 313. Long plate; 314. Connecting sleeve; 315. Alternating spring; 316. Actuating spring. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0022] Please see Figures 1-10A vertical sand pump includes a motor 11, four sets of support rods 12 connected to the lower end of the motor 11, and a base plate 13 connected to the other end of the support rods 12. An output shaft 14 is connected to the output end of the motor 11, and a sleeve 15 is fitted around the outer side of the output shaft 14. One end of the sleeve 15 is fixedly connected to the lower end of the motor 11, and the other end is fixedly connected to the upper end of the base plate 13. The output shaft 14 passes through the base plate 13 and a volute 21 and is rotatably connected to the volute 21. A throwing wheel 23 and a pushing wheel 24 are both fixedly fitted onto the output shaft 14. The pump also includes a water conveying mechanism, which includes a volute 21. A water outlet pipe 22 is connected to the side wall of the volute 21, and a throwing wheel 23 is rotatably connected inside the volute 21. A pushing wheel 24 is connected to the lower end of the throwing wheel 23. The feed wheel 24 and push wheel 24 are also rotatably connected to the inner side of the volute 21. The lower end face of the output shaft 14 is connected to the connecting rod 25. The surface of the connecting rod 25 is fitted with a slide bar 26. The lower end face of the connecting rod 25 is connected to the push plate 27. The outer side of the connecting rod 25 is fitted with a conical conveying wheel 28. The inner side wall of the conical conveying wheel 28 is provided with a groove 29 that matches the slide bar 26. The slide bar 26 is embedded in the groove 29 and slidably connected to it. The conical conveying wheel 28 is located inside the outer shell 31. The conical conveying wheel 28 is provided with a compression spring 210. The two ends of the compression spring 210 are provided with thrust bearings 211. The upper thrust bearing 211 is located between the compression spring 210 and the conical conveying wheel 28, and the lower thrust bearing 211 is located between the compression spring 210 and the push plate 27. It also includes a balancing mechanism, which includes a housing 31. The upper end face of the housing 31 is fixedly connected to the lower end face of the volute 21. A base 32 is connected to the lower end face of the housing 31. Multiple sets of water inlet grooves 33 are opened on the outer side wall of the housing 31. An intermediate rod 34 is provided between the water inlet grooves 33. A first actuating plate 35 is provided in each set of water inlet grooves 33. A first sleeve 36 is provided at the center of the side wall of the first actuating plate 35. The first sleeve 36 is sleeved on the intermediate rod 34 and rotatably connected to the intermediate rod 34. A second actuating plate 37 is also provided in each set of water inlet grooves 33. Two sets of second sleeves 38 are provided at both ends of the side wall of the second actuating plate 37. The second sleeves 38 are sleeved on both ends of the intermediate rod 34 and connected to the intermediate rod. 34 Rotatable connection, the side wall of the first actuating plate 35 is provided with multiple sets of first actuating plates 39, the side wall of the second actuating plate 37 is provided with multiple sets of second actuating plates 310, multiple sets of hinge rods 311 are provided between the multiple sets of first actuating plates 39 and multiple sets of second actuating plates 310, a conical head 312 is rotatably connected to the hinge rod 311, a long plate 313 is connected to the side wall of the conical head 312, a connecting sleeve 314 is connected to the other side of the long plate 313, a directional spring 315 is connected between the multiple sets of connecting sleeves 314 on the first actuating plate 35 and the multiple sets of connecting sleeves 314 on the second actuating plate 37, and three sets of actuating springs 316 are connected between the first actuating plate 35 and the second actuating plate 37.

[0023] In this invention, the sand pump can balance the high sand content of the water flow before it is transported. Specifically, the operator lowers the sand pump into the water, with the base 32 contacting the bottom. The motor 11 is then started, and the output end of the motor 11 drives the output shaft 14 to rotate at high speed. The output shaft 14 drives the throwing wheel 23 and the pushing wheel 24 to rotate synchronously. Simultaneously, the output shaft 14 also drives the connecting rod 25 connected below, along with the conical conveying wheel 28, to rotate. Under normal transport conditions, the water flows into the outer casing 31 through the inlet trough 33. During the process of the water flowing into the outer casing 31, the water flows through the first wave... When the moving plate 39 and the second moving plate 310 move, they push the first moving plate 35 and the second moving plate 37 to swing along the middle rod 34. The moving spring 316 is compressed and stretched accordingly. At this time, the swing amplitude is very small. When the water flows through the conical head 312, the conical head 312 will also swing slightly along the hinge rod 311. The aligning spring 315 on each side is connected to the corresponding multiple sets of connecting sleeves 314, which can assist the conical head 312 and the long plate 313 in aligning and resetting, so that the conical head 312 always faces the outside of the outer shell 31. When the water flows into the inside of the outer shell 31, the conical conveying wheel 28 pushes the water flow to At the upper push wheel 24, the water flow is further pushed upwards by the push wheel 24, and finally thrown into the vortex shell 21 by the throw wheel 23. The vortex shell 21 converts kinetic energy into static pressure energy, and then outputs it through the outlet pipe 22. When the sand content in the transported water flow suddenly increases, the water flow density increases, and the impact force on the first actuating plate 39 and the second actuating plate 310 at the same flow velocity is greater. Therefore, during the process of this water flow entering the outer shell 31 through the inlet trough 33, the swing amplitude of the first actuating plate 35 and the second actuating plate 37 increases, and the spring amplitude of the actuating spring 316 also increases synchronously. The amplitude of the swing of the conical head 312 and the long plate 313 along the hinge rod 311 also increases synchronously. At this time, under the swing of the first actuating plate 35, the second actuating plate 37, the first actuating piece 39, the second actuating piece 310, the conical head 312 and the long plate 313, the time of water flow density change can be extended, abrupt changes can be reduced, and the sudden increase of water flow density in the outer shell 31 can be avoided. After the water flow density returns to normal, the first actuating plate 35 and the second actuating plate 37 gradually return to a slightly stable swing state. Under the action of the rectifying spring 315, the conical head 312 and the long plate 313 also gradually stabilize. A compression spring 210 is installed inside the conical conveyor wheel 28. The compression spring 210 constantly pushes the conical conveyor wheel 28, causing it to tend to slide upwards. When the sand pump is not running, the conical conveyor wheel 28 is pushed to the upper end of the outer casing 31 by the compression spring 210. The slide bar 26 is spirally wound around the connecting rod 25. During this process, the slide bar 26 slides along the slide groove 29, and the conical conveyor wheel 28 rotates and moves upwards until the upper end face of the conical conveyor wheel 28 abuts against the lower end face of the output shaft 14. At this time, the conical conveyor wheel 28 is blocked. Water cannot flow out through the opening at the top of the outer casing 31. When the motor 11 starts, it drives the output shaft 14 to rotate. At this time, the conical conveyor wheel 28 does not rotate initially due to the resistance of the water flow. However, the output shaft 14 drives the connecting rod 25 to rotate, so the conical conveyor wheel 28 is driven to move downward. The conical conveyor wheel 28 no longer blocks the opening at the top of the outer casing 31, and the compression spring 210 is compressed. After that, the conical conveyor wheel 28 begins to rotate synchronously with the output shaft 14 to perform the conveying operation.

[0024] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be elaborated upon in this invention. Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A vertical sand pump comprising a motor (11), characterized in that: The lower end surface of the motor (11) is connected with four groups of support rods (12), the other end of the support rod (12) is connected with the bottom plate (13); it also includes a water delivery mechanism, the water delivery mechanism includes a volute (21), the side wall of the volute (21) is connected with a water outlet pipe (22), the volute (21) is rotatably connected with a throwing wheel (23), the lower end surface of the throwing wheel (23) is connected with a push wheel (24), the push wheel (24) is also rotatably connected with the inner side of the volute (21); it also includes a balancing mechanism, the balancing mechanism includes a shell (31), the upper end surface of the shell (31) is fixedly connected with the lower end surface of the volute (21), the lower end surface of the shell (31) is connected with a base (32), a plurality of water inlet grooves (33) are formed in the outer side wall of the shell (31), and the intermediate rod (34) is arranged between the water inlet grooves (33).

2. A vertical sand pump according to claim 1, characterized in that: The output end of the motor (11) is connected with an output shaft (14), the outer side of the output shaft (14) is sleeved with a sleeve pipe (15), one end of the sleeve pipe (15) is fixedly connected with the lower end surface of the motor (11), the other end is fixedly connected with the upper end surface of the bottom plate (13), the output shaft (14) passes through the bottom plate (13) and the volute (21) and is rotatably connected with the volute (21), and the throwing wheel (23) and the push wheel (24) are fixedly sleeved on the output shaft (14).

3. A vertical sand pump according to claim 2, characterised in that: The lower end surface of the output shaft (14) is connected with a connecting rod (25), the surface of the connecting rod (25) is sleeved with a sliding strip (26), and the lower end surface of the connecting rod (25) is connected with a push plate (27).

4. A vertical sand pump according to claim 3, characterised in that: The outer side of the connecting rod (25) is sleeved with a conical conveying wheel (28), the inner side wall of the conical conveying wheel (28) is formed with a sliding groove (29) matched with the sliding strip (26), the sliding strip (26) is embedded in the sliding groove (29) and is in sliding connection with the sliding groove (29), and the conical conveying wheel (28) is located in the shell (31).

5. A vertical sand pump according to claim 4, characterised in that: The conical conveying wheel (28) is provided with a compression spring (210), the two ends of the compression spring (210) are provided with thrust bearings (211), the upper end of the thrust bearing (211) is arranged between the compression spring (210) and the conical conveying wheel (28), and the lower end of the thrust bearing (211) is arranged between the compression spring (210) and the push plate (27).

6. A vertical sand pump according to claim 1, characterized in that: A first driving plate (35) is arranged in each group of water inlet grooves (33), a first sleeve (36) is arranged at the center position of the side wall of the first driving plate (35), and the first sleeve (36) is sleeved on the intermediate rod (34) and rotatably connected with the intermediate rod (34).

7. A vertical sand pump according to claim 6, characterised in that: A second driving plate (37) is also arranged in each group of water inlet grooves (33), two groups of second sleeves (38) are arranged at the two ends of the side wall of the second driving plate (37), and the second sleeves (38) are sleeved on the two ends of the intermediate rod (34) and rotatably connected with the intermediate rod (34).

8. A vertical sand pump according to claim 7, characterised in that: A plurality of first driving pieces (39) are arranged on the side wall of the first driving plate (35), a plurality of second driving pieces (310) are arranged on the side wall of the second driving plate (37), and a plurality of hinged rods (311) are arranged between the plurality of first driving pieces (39) and the plurality of second driving pieces (310).

9. A vertical sand pump according to claim 8, characterised in that: A conical head (312) is rotationally connected on the articulated rod (311), a long plate (313) is connected on the side wall of the conical head (312), and a connecting sleeve (314) is connected on the other side of the long plate (313).

10. A vertical sand pump according to claim 9, characterized in that: A plurality of groups of connecting sleeves (314) on the first dialing plate (35) and a plurality of groups of connecting sleeves (314) on the second dialing plate (37) are connected with dialing springs (315), and three groups of dialing springs (316) are connected between the first dialing plate (35) and the second dialing plate (37).

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