Premixing type batching device for multi-salt proportioning

Abstract

The invention relates to the technical field of molten salt melting, in particular to a premixing type batching device for multi-salt proportioning, which comprises a salt mixing bin, a salt storage bin is arranged at the bottom of the salt mixing bin, three weighing assemblies are arranged in the salt mixing bin, sub-bins in the weighing assemblies are arranged in the salt mixing bin, and the sub-bins in the weighing assemblies are arranged in the salt mixing bin. The premixing type batching device comprises a salt mixing bin, a plurality of sub-bins are arranged in the salt mixing bin, an annular cylindrical weight sensor is arranged at the bottom of each sub-bin, a cleaning assembly is slidably connected to the inner side of each sub-bin, a blowing assembly is arranged at the bottom of the inner side of each sub-bin, and a stirring and mixing assembly is arranged in the salt mixing bin. The ring-column-shaped weight sensor and the blanking flashboard are interlocked for accurate weighing, the cleaning assembly is matched for scraping and sweeping, the sweeping assembly is matched for directional sweeping, residues are eliminated, accurate matching is guaranteed, a three-dimensional flow field is formed by means of a three-dimensional mixing structure, different salt material mixing requirements are met, automatic batching is achieved, manpower input is reduced, and mixing uniformity, efficiency and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of molten salt melting technology, specifically to a premixed batching device for multi-element salt ratios. Background Technology

[0002] Premixed batching devices are integrated equipment that accurately mixes multiple materials in proportion and achieves automated batching. Premixed batching devices for multi-salt ratios can accurately control the proportion of each salt, avoid uneven composition, and also achieve automated continuous operation, reduce human error, ensure stable product quality, and meet the needs of batch production of multi-salts.

[0003] The molten salts used in existing solar thermal power plants, compressed air energy storage power plants, and chemical systems are basically multi-element salts (including binary salts). Molten salts are solid under normal conditions, and the salts produced in factories are elemental salts. However, they need to be mixed and melted into liquids for use during operation. For the melting of large quantities of solid multi-element salts, the single salts are often manually fed into the conveying system for mixing before being sent to the salt melting furnace for melting. This method results in a coarse molten salt mix, which leads to a deviation between the molten salt mix in the furnace and the required molten salt mix, affecting the eutectic properties and performance of the molten salt, and also consumes a lot of manpower.

[0004] To address this, we propose a premixing device for multi-element salt proportioning that can accurately control the weighing of each elemental salt, ensure precise proportions of mixed salt components, and achieve high-precision automated control. Summary of the Invention

[0005] One of the technical problems this application aims to solve is that for the melting of large quantities of solid multi-element salts, the single salts are often manually fed into the conveying system for mixing before being sent into the salt melting furnace for melting. This can lead to a deviation between the molten salt ratio in the furnace and the required molten salt ratio, affecting the eutectic properties and performance of the molten salt.

[0006] To address the aforementioned technical problems, this application provides a premixed batching device for multi-element salt ratios, comprising a salt mixing chamber, a salt storage chamber at the bottom of the salt mixing chamber, three weighing components inside the salt mixing chamber, a sub-material chamber in the weighing components being located inside the salt mixing chamber, a ring-shaped weight sensor at the bottom of the sub-material chamber, a cleaning component slidably connected to the inner side of the sub-material chamber, a purging component at the bottom inner side of the sub-material chamber, and a stirring and mixing component inside the salt mixing chamber.

[0007] In some embodiments, a mixing electric gate device is provided on the top right side of the salt storage bin, a connecting pipe is provided on the top left side of the salt storage bin, and an electric regulating door is provided at the bottom of the salt storage bin.

[0008] In some embodiments, the weighing assembly includes a mounting plate disposed outside the interior of the mixed salt bin and outside the sub-bin.

[0009] In some embodiments, a discharge pipe is provided at the top of the outer side of the sub-material bin, a sub-material storage hopper is provided at the top of the discharge pipe, a discharge gate is provided on the outside of the discharge pipe, and an electric gate for the sub-material bin is provided at the bottom of the outer side of the sub-material bin.

[0010] In some embodiments, the cleaning assembly includes a piston plate, the piston plate being slidably connected to the inside of the sub-hopper, and an electric push rod being provided at the top of the inside of the mixed salt hopper, with the drive end of the electric push rod located at the top of the piston plate.

[0011] In some embodiments, the piston plate is provided with inclined dense elastic fibers on its exterior, a rotating connecting pipe is rotatably connected to the bottom of the piston plate, a fixing ring is provided at the bottom of the piston plate, and a connecting plate is provided at the bottom of the fixing ring.

[0012] In some embodiments, a micro motor is provided on the top of the connecting plate, the driving end of the micro motor is provided at the bottom of the rotating connecting tube, Z-shaped conveying tubes are provided on both outer sides of the rotating connecting tube, and limiting protrusions are provided on the outer side of the Z-shaped conveying tubes. The two limiting protrusions are slidably connected to the outer side of the fixed ring in the annular groove, and an air jet plate is provided at the end of the Z-shaped conveying tube.

[0013] In some embodiments, the purging assembly includes a connecting ring, the outer side of which is disposed at the inner bottom of the sub-bin, and the bottom of the connecting ring is provided with three arc-shaped inclined jet plates. Each of the three arc-shaped inclined jet plates is provided with multiple unidirectional nozzles on a horizontally similar side. An air jet pipe is provided on the outer side of the connecting ring, and an air jet device installed on the outer side of the mixed salt bin is provided at the end of the air jet pipe.

[0014] In some embodiments, the stirring and mixing assembly includes a rotating shaft, which is rotatably connected to the outside of the salt mixing chamber. A servo motor is provided at the top of the salt mixing chamber, and the drive end of the servo motor is provided at the top of the salt mixing chamber. A frustum-shaped guide plate is provided at the bottom of the rotating shaft.

[0015] In some embodiments, the interior of the salt mixing chamber is provided with a guide groove, the top of the frustum-shaped guide plate is at the bottom of the guide groove, the bottom of the frustum-shaped guide plate is provided with a rotary cutting blade, the exterior of the frustum-shaped guide plate is provided with six trapezoidal guide holes, the inner side of the trapezoidal guide holes is provided with stirring spiral patterns, and the top of the frustum-shaped guide plate is provided with six arc-shaped baffles.

[0016] The present invention has at least the following beneficial effects: 1. By using a ring-shaped weight sensor to monitor in real time and interlock with the discharge gate, the weight of each elemental salt is accurately controlled. Combined with the mechanical scraping of the cleaning component and the assisted cleaning of the rotating airflow, and the directional and precise blowing of the blowing component, the proportion deviation caused by residual salt on the bin wall and sensor is eliminated, ensuring the accurate proportion of mixed salt components. This achieves high-precision automated control of multi-element salt ratio, improving the eutectic performance of molten salt and its reliability.

[0017] 2. Relying on the three-dimensional mixing structure to achieve efficient and uniform mixing, the flow guidance of the frustum-shaped guide plate, the guidance of the spiral pattern of the trapezoidal guide hole, the slicing of the rotary blade and the turbulence of the arc-shaped baffle work together to form a three-dimensional mixing flow field, breaking the aggregation and stratification of salt materials, adapting to the mixing needs of single salts with different densities and particle sizes. At the same time, the automated process greatly reduces the input of manpower and improves the efficiency and stability of batching. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the material feeding tube structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the annular cylindrical weight sensor structure of the present invention; Figure 5 This is a schematic diagram of the frustum-shaped flow guide disk structure of the present invention; Figure 6 This is a schematic diagram of the electric actuator structure of the present invention; Figure 7 This is a schematic diagram of the piston plate structure of the present invention; Figure 8 This is a schematic diagram of the arc-shaped inclined jet plate structure of the present invention.

[0019] In the diagram: 1. Salt mixing bin; 2. Salt storage bin; 3. Weighing assembly; 31. Mounting plate; 32. Sub-material bin; 33. Discharge pipe; 34. Sub-material storage hopper; 35. Sub-bin electric gate; 36. Annular cylindrical weight sensor; 37. Discharge gate; 4. Mixing assembly; 41. Rotating shaft; 42. Servo motor; 43. Frustum-shaped guide plate; 44. Guide groove; 45. Rotary cutting blade; 46. Trapezoidal guide hole; 47. Mixing spiral; 48. Arc-shaped 5. Spoiler; 51. Cleaning assembly; 52. Piston plate; 53. Electric push rod; 54. Inclined dense elastic fluff; 55. Fixing ring; 56. Rotary connecting pipe; 57. Micro motor; 58. Connecting plate; 59. Z-shaped conveying pipe; 60. Limiting protrusion; 61. Blowing assembly; 62. Connecting ring; 63. Arc-shaped inclined jet plate; 64. One-way nozzle; 7. Jet pipe; 8. Mixing compartment electric gate device; 9. Storage compartment electric regulating door; 10. Connecting pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 8 The present invention provides a technical solution: a premixed batching device for multi-element salt ratio, including a salt mixing chamber 1, which is a cylindrical sealed cavity for containing various elemental salts and providing mixing space. A salt storage chamber 2 is provided at the bottom of the salt mixing chamber 1, which is a cylindrical structure coaxial with the salt mixing chamber 1 for storing the mixed multi-element salts. Three weighing components 3 are provided inside the salt mixing chamber 1, which are evenly distributed along the circumference of the salt mixing chamber 1 for weighing different types of elemental salts respectively. A stirring and mixing component 4 is provided inside the salt mixing chamber 1, which is located at the central axis of the salt mixing chamber 1 for achieving uniform mixing of salts. The sub-bin 32 of the weighing assembly 3 is located inside the salt mixing chamber 1. It is a cylindrical hollow structure with an open top and an open bottom. A ring-shaped weight sensor 36 is installed at the bottom of the sub-bin 32. Its inner diameter is slightly larger than the diameter of the bottom opening of the sub-bin 32 to accurately collect the weight data of the salt. A cleaning assembly 5 is slidably connected to the inner side of the sub-bin 32 and can move along the axial direction of the sub-bin 32 to clean the residual salt on the inner wall. A blowing assembly 6 is installed at the bottom of the inner side of the sub-bin 32 and is arranged around the bottom opening of the sub-bin 32 to blow away the residue on the sensor surface. The weighing assembly 3 includes a mounting plate 31, which is an annular flat plate structure used to support the sub-material bin 32. The outside of the mounting plate 31 is set inside the mixing salt bin 1 and is fixedly connected to the inner wall of the mixing salt bin 1 by welding. The outside of the mounting plate 31 is set outside the sub-material bin 32 and is fixed to the outer wall of the sub-material bin 32 by bolts to achieve stable support. The top of the sub-material bin 32 is provided with a discharge pipe 33, which is a downward inclined circular pipe used to guide the elemental salt to fall. The top of the discharge pipe 33 is provided with a sub-material storage hopper 34, which is a funnel-shaped structure with an open top for temporarily storing elemental salt. The outside of the discharge pipe 33 is provided with a discharge gate 37, which is a plate structure that can slide in the horizontal direction to realize the opening and closing of the discharge pipe 33. The bottom of the sub-material bin 32 is provided with a sub-bin electric gate 35, which is an annular gate that can move in the vertical direction to control the discharge of sub-material bin 32. The cleaning component 5 includes a piston plate 51, which is a circular flat plate structure adapted to the inner wall of the sub-material bin 32. The piston plate 51 is slidably connected to the inner side of the sub-material bin 32 and can slide up and down along the inner wall of the sub-material bin 32 to scrape the residue. An electric push rod 52 is provided at the top of the interior of the mixed salt bin 1, which is arranged vertically downward to provide linear driving force. The driving end of the electric push rod 52 is located at the top of the piston plate 51 and is fixedly connected to the piston plate 51 through a flange to transmit power. The piston plate 51 is provided with inclined dense elastic fibers 53, which are evenly distributed along the circumference of the piston plate 51 and inclined downward. The bottom of the piston plate 51 is rotatably connected to a rotating connecting pipe 55, which is a hollow round pipe that can rotate around its own axis. The piston plate 51 has a fixing ring 54 at its bottom, which is a ring structure for limiting and supporting. The fixing ring 54 has a connecting plate 57 at its bottom, which is a horizontally arranged circular plate for mounting components. The connecting plate 57 has a micro motor 56 at its top, with its output shaft arranged vertically upward to provide rotational power. The drive end of the micro motor 56 is located at the bottom of the rotating connecting pipe 55 and is fixed to the rotating connecting pipe 55 through a coupling to achieve power transmission. Both sides of the rotating connecting pipe 55 have Z-shaped conveying pipes 58, which are hollow pipes that are bent twice to transport airflow. The Z-shaped conveying pipe 58 has a limiting protrusion 59 on its outside, which is a cylindrical protrusion that fits into an annular groove. The two limiting protrusions 59 are slidably connected to the annular groove inside the fixing ring 54, and can slide smoothly along the annular groove to limit the axial displacement of the Z-shaped conveying pipe 58. The Z-shaped conveying pipe 58 has a jet plate at its end, which is a rectangular plate structure with multiple small spray holes on its surface. The purging assembly 6 includes a connecting ring 61, which is a hollow annular structure used to split compressed air. The outer side of the connecting ring 61 is located at the bottom of the inner side of the sub-material bin 32 and is fixedly connected to the inner wall of the sub-material bin 32 by a bracket. Three arc-shaped inclined jet plates 62 are provided at the bottom of the connecting ring 61, which are evenly distributed around the circumference of the connecting ring 61 and inclined towards the center. Multiple unidirectional nozzles 63 are provided on the horizontally similar side of the three arc-shaped inclined jet plates 62, which are evenly arranged along the length of the jet plates and spray air only towards the sensor. An air jet pipe 64 is provided on the outside of the connecting ring 61. It is a rigid round pipe used to connect the air jet device and the connecting ring 61. An air jet device installed on the outside of the mixed salt bin 1 is provided at the end of the air jet pipe 64, which can provide compressed air with stable pressure.

[0022] Example 2: Please refer to Figure 2 , Figure 3 and Figure 5 The mixing assembly 4 includes a rotating shaft 41, which is a cylindrical solid shaft used to transmit rotational power. The external part of the rotating shaft 41 is rotatably connected to the inside of the salt mixing chamber 1, and flexibly rotates through the upper and lower end bearings. A servo motor 42 is set on the top of the salt mixing chamber 1, and the output shaft is arranged vertically downward to provide stirring power. The drive end of the servo motor 42 is set on the top of the salt mixing chamber 1 and is fixedly connected to the top of the rotating shaft 41 through a coupling. A frustum-shaped guide plate 43 is set at the bottom of the rotating shaft 41, which is narrow at the top and wide at the bottom to guide the flow of salt. A guide groove 44 is opened inside the salt mixing chamber 1. It is an annular inclined groove structure used to guide the various elemental salts falling from the weighing assembly 3. The top of the frustum-shaped guide plate 43 is at the bottom of the guide groove 44, which plays a stirring and mixing role for the falling various elemental salts. When the rotating shaft 41 drives the frustum-shaped guide plate 43 to rotate, the inclined surface of the frustum-shaped guide plate 43 generates an upward thrust, pushing the salt material below upward along the plate wall, forming a macroscopic airflow and material flow that diffuses from the bottom upward to the outer periphery. The bottom of the frustum-shaped guide plate 43 is provided with rotary cutting blades 45, which are evenly distributed in a spiral shape along its circumference for rotary cutting of the salt material. They cover the bottom area of ​​the salt mixing bin 1, stirring and rotary cutting the salt material accumulated at the bottom. At the same time, the inclined arc-shaped groove structure on its outer surface lifts the salt upward to the outside of the frustum-shaped guide plate 43 and mixes with the upper layer. The falling salt converges, eliminating the bottom mixing dead zone. At the same time, the annular scraper sweeps away the residual salt at the bottom of the bin to prevent accumulation. The frustum-shaped guide plate 43 has six trapezoidal guide holes 46 on its outside, which are evenly distributed around the circumference of the guide plate and are wider at the top and narrower at the bottom to guide the cross flow of the salt. The inner side of the trapezoidal guide holes 46 is provided with stirring spirals 47, which extend spirally along the hole wall to enhance the mixing effect of the salt. The top of the frustum-shaped guide plate 43 is provided with six arc-shaped baffles 48, which are evenly distributed around the circumference of the guide plate and bend in the direction of rotation to generate turbulence. A mixing chamber electric gate device 7 is installed on the top right side of the salt storage bin 2, which is adapted to the bottom opening of the mixing chamber 1 to control the flow of mixed salt. A connecting pipe 9 is installed on the top left side of the salt storage bin 2, which extends vertically upward and connects to the atmosphere to balance the air pressure inside the bin. An electric regulating gate 8 is installed at the bottom of the salt storage bin 2. The liquid level sensor in the salt melting furnace monitors the liquid molten salt level in real time. When the liquid level is lower than the preset threshold, the opening degree of the electric regulating gate 8 is adjusted, and the mixed salt falls into the salt melting furnace through the electric regulating gate 8 to replenish the liquid molten salt. When the liquid level in the salt melting furnace rises back to the normal threshold, the electric regulating gate 8 automatically closes, realizing on-demand feeding, ensuring the stable operation of the salt melting furnace and the eutectic performance and usability of the molten salt.

[0023] Based on the above embodiments, the following is the complete working principle of the above embodiments: The operator adds different types of solid elemental salts to each sub-material storage hopper 34 to be mixed. The elemental salts are temporarily stored in the sub-material storage hopper 34, waiting for the replenishment command. The annular cylindrical weight sensor 36 monitors the weight in the sub-material bin 32 in real time. In the initial state, there is no salt in the sub-material bin 32, and the weight detection value is zero, which triggers the interlocking opening of the discharge gate 37. The elemental salts in the sub-material storage hopper 34 fall naturally into the corresponding sub-material bin 32 through the discharge pipe 33. The annular cylindrical weight sensor 36... Continuously collecting weight data, when the weight of salt in a certain sub-bin 32 reaches the preset ratio requirement, the corresponding discharge gate 37 stops feeding. Once all three sub-bins 32 have reached their respective preset weights, all discharge gates 37 close simultaneously, completing accurate weighing. After weighing, all sub-bin electric gates 35 open simultaneously, and the elemental salt in the sub-bins 32 falls into the mixed salt bin 1 under gravity through the hollow opening of the annular weight sensor 36. After discharge, the sub-bin electric gate 35 closes, the cleaning component 5 starts, and the electric push rod 52... The piston plate 51 slides downwards along the inner wall of the sub-bin 32. The inclined, dense, elastic fibers 53 on the outside of the piston plate 51 closely adhere to the bin wall, scraping away residual salt and ensuring that there is no residue adhering to the bin wall. At the same time, the micro motor 56 drives the rotary connecting pipe 55 to rotate, causing the Z-shaped conveying pipe 58 to rotate around the axis of the rotary connecting pipe 55. The limiting protrusion 59 slides along the annular groove on the inner side of the fixing ring 54. The jet plate at the end of the Z-shaped conveying pipe 58 rotates synchronously, spraying airflow onto the inner wall of the sub-bin 32 to assist in cleaning stubborn residual salt. The cleaning component 5 is now in operation. After completion, the purging assembly 6 is activated, and the jetting device supplies air to the connecting ring 61 through the jetting pipe 64. After the airflow is split by three arc-shaped inclined jet plates 62, it is directionally sprayed out from multiple unidirectional nozzles 63 to accurately purge the upper surface and opening edge of the cylindrical weight sensor 36, and purge the residual salt into the mixing salt bin 1 to avoid residue causing the next weighing deviation. After the purging is completed, the electric push rod 52 drives the piston plate 51 to reset, the discharge gate 37 reopens, and the sub-material storage hopper 34 replenishes the sub-material bin 32 again to prepare for the next round of mixing. Once all the salt from the sub-bins 32, along with any residual salt from cleaning and purging, has fallen into the mixing bin 1, the control system activates the servo motor 42, driving the rotating shaft 41 to rotate the frustum-shaped guide plate 43. As the frustum-shaped guide plate 43 rotates, its frustum structure generates an upward thrust, causing the salt at the bottom of the mixing bin 1 to rise along the plate wall. Simultaneously, under centrifugal force, the salt diffuses outwards. Some of the salt passes through the six trapezoidal guide holes 46 on the outside of the frustum-shaped guide plate 43. The stirring spiral 47 inside the trapezoidal guide holes 46 guides the salt along the spiral trajectory, enhancing the cross-mixing effect. The guide groove 44 inside the mixing bin 1 guides the various elemental salts falling from the symmetrical measuring component 3, preventing disorderly splashing. The rotary cutting blades 45 at the bottom of the frustum-shaped guide plate 43 rotate synchronously with the guide plate, rotary cutting and stirring the salt in the lower area of ​​the mixing bin 1, breaking up the salt's aggregated state. When the six arc-shaped baffles 48 on the top of the frustum-shaped guide plate 43 rotate, they generate turbulence, which creates a turbulent effect on the upper salt material. This achieves three-dimensional mixing of upper turbulence, middle guidance, and lower slicing, ensuring that elemental salts of different densities and particle sizes are uniformly fused and that the mixing uniformity meets the requirements. After the stirring reaches the preset time, the servo motor 42 stops running, the frustum-shaped guide plate 43 comes to a stable stop, and the salt material is left to stand for a period of time to ensure that the residual salt material in the trapezoidal guide hole 46 falls naturally into the mixing chamber 1. After the stirring is completed, the control system opens the electric gate device 7 of the mixing chamber. The uniformly mixed solid multi-element salt in the mixing chamber 1 falls into the salt storage chamber 2 under the action of gravity. After the material is dropped, the electric gate device 7 of the mixing chamber closes, and the mixing chamber 1 waits to receive the next batch of salt material. The connecting pipe 9 at the top of the salt storage chamber 2 is kept in contact with the atmosphere to balance the air pressure in the chamber and prevent the salt material from clumping due to air pressure difference or obstructing the dropping process.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A premixing batching device for multi-element salt ratios, comprising a salt mixing bin (1), characterized in that: The bottom of the salt mixing chamber (1) is provided with a salt storage chamber (2). The inside of the salt mixing chamber (1) is provided with three weighing components (3). The sub-material chamber (32) of the weighing component (3) is located inside the salt mixing chamber (1). The bottom of the sub-material chamber (32) is provided with a ring-shaped weight sensor (36). The inner side of the sub-material chamber (32) is slidably connected with a cleaning component (5). The bottom of the inner side of the sub-material chamber (32) is provided with a purging component (6). The inside of the salt mixing chamber (1) is provided with a stirring and mixing component (4).

2. The premixing and batching device for multi-element salt ratio according to claim 1, characterized in that: The salt storage bin (2) is provided with a mixing electric gate device (7) on the top right side, a connecting pipe (9) is provided on the top left side of the salt storage bin (2), and an electric regulating door (8) is provided at the bottom of the salt storage bin (2).

3. The premixing and batching device for multi-element salt ratio according to claim 1, characterized in that: The weighing assembly (3) includes a mounting plate (31), the exterior of which is disposed inside the mixed salt bin (1), and the exterior of which is disposed outside the sub-bin (32).

4. The premixing and batching device for multi-element salt ratio according to claim 3, characterized in that: The top of the sub-material bin (32) is provided with a discharge pipe (33), the top of the discharge pipe (33) is provided with a sub-material storage hopper (34), the outside of the discharge pipe (33) is provided with a discharge gate (37), and the bottom of the sub-material bin (32) is provided with a sub-bin electric gate (35).

5. The premixing and batching device for multi-element salt ratio according to claim 1, characterized in that: The cleaning assembly (5) includes a piston plate (51), the piston plate (51) is slidably connected to the inside of the sub-bin (32), and an electric push rod (52) is provided at the top of the inside of the mixed salt bin (1), with the driving end of the electric push rod (52) located at the top of the piston plate (51).

6. The premixing and batching device for multi-element salt ratio according to claim 5, characterized in that: The piston plate (51) is provided with inclined dense elastic fibers (53) on the outside. The bottom of the piston plate (51) is rotatably connected to a rotating connecting pipe (55). The bottom of the piston plate (51) is provided with a fixing ring (54). The bottom of the fixing ring (54) is provided with a connecting plate (57).

7. The premixing and batching device for multi-element salt ratio according to claim 6, characterized in that: A micro motor (56) is provided on the top of the connecting plate (57). The driving end of the micro motor (56) is provided at the bottom of the rotating connecting pipe (55). Z-shaped conveying pipes (58) are provided on both sides of the rotating connecting pipe (55). Limiting protrusions (59) are provided on the outside of the Z-shaped conveying pipes (58). The two limiting protrusions (59) are slidably connected to the annular groove inside the fixing ring (54). An air jet plate is provided at the end of the Z-shaped conveying pipe (58).

8. The premixing and batching device for multi-element salt ratio according to claim 2, characterized in that: The purging assembly (6) includes a connecting ring (61), the outer side of which is located at the bottom of the inner side of the sub-bin (32). The bottom of the connecting ring (61) is provided with three arc-shaped inclined jet plates (62). Each of the three arc-shaped inclined jet plates (62) is provided with multiple unidirectional nozzles (63) on the horizontally similar side. The outer side of the connecting ring (61) is provided with an air jet pipe (64), and the end of the air jet pipe (64) is provided with an air jet device installed outside the mixed salt bin (1).

9. The premixing and batching device for multi-element salt ratio according to claim 1, characterized in that: The stirring and mixing assembly (4) includes a rotating shaft (41), which is rotatably connected to the outside of the salt mixing chamber (1). A servo motor (42) is provided at the top of the salt mixing chamber (1), and the drive end of the servo motor (42) is provided at the top of the salt mixing chamber (1). A frustum-shaped guide plate (43) is provided at the bottom of the rotating shaft (41).

10. The premixing and batching device for multi-element salt ratio according to claim 9, characterized in that: The mixing salt tank (1) has a guide groove (44) inside. The top of the frustum-shaped guide plate (43) is at the bottom of the guide groove (44). The bottom of the frustum-shaped guide plate (43) is provided with a rotary cutting blade (45). The frustum-shaped guide plate (43) has six trapezoidal guide holes (46) on the outside. The inner side of the trapezoidal guide holes (46) is provided with stirring spiral patterns (47). The top of the frustum-shaped guide plate (43) is provided with six arc-shaped baffles (48).

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