Mixing device for saline-alkali soil improvement fertilizer

Abstract

The invention relates to the technical field of saline-alkali land treatment, in particular to a saline-alkali land improvement fertilizer mixing device which comprises a mounting support, a mixing barrel is arranged on the mounting support, a plurality of discharging barrels are circumferentially arranged on the mixing barrel, discharging pipes of the discharging barrels are communicated with the upper side of the mixing barrel, and a discharging pipe is arranged at the lower end of the mixing barrel; a rotating disc is arranged in the mixing barrel, the rotating disc is driven by a driving mechanism to rotate, a stopper is arranged below the rotating disc and comprises a material blocking ring plate located on the outer edge of the rotating disc and a lifting part connected with the material blocking ring plate, and the material blocking ring plate comprises a grid plate and a solid ring plate arranged on the lower side of the grid plate. Various powders fall on the turntable, are thrown to the outer edge under the action of centrifugal force, are blocked by the solid ring plate of the material blocking ring plate, are stacked together, are scattered from the periphery through the grid plate, fall off from the discharge pipe after being converged and staggered together, and finally fall on the ground, so that the powders falling on the ground are relatively uniform, and the friction between the powders and the stirring paddle is avoided; the powder structure is prevented from being damaged or dangers are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land treatment, in particular to a mixing device for improving saline-alkali land with fertilizers. Background Art

[0002] Saline-alkali land refers to land that contains a large amount of soluble salts such as sodium chloride and sodium carbonate. This kind of land is not conducive to the growth of crops and needs to be further improved. Improving saline-alkali land can not only improve the farming conditions of the land, but is also an important task related to agricultural production and sustainable development. The general ways to improve the land are: leaching, deep plowing, application of organic fertilizers and other methods. Among them, the application of organic fertilizers can improve the soil structure, increase the organic matter content of the soil, and improve the water retention and nutrient supply capacity of the soil, thereby achieving rapid and effective improvement of the soil quality of saline-alkali land and improving the yield and quality of crops. Therefore, it is widely used. The operation method is to first mix various organic fertilizer powders through a mixing device, and then evenly sprinkle them on the surface of the saline-alkali land to fully mix the organic fertilizer with the soil.

[0003] In the prior art, a mixing device for organic fertilizer powders usually puts various powders into a mixing barrel, stirs and mixes the powders through a structure such as a stirring paddle, and then sprinkles the powders on the surface of the saline-alkali land. However, the powders are solid fine particles or powders, which have a greater barrier effect on the stirring paddle. The stirring paddle has a greater degree of friction with the powders during operation, which easily generates heat. Continuous heating after working for a long time is likely to destroy the powder structure or cause danger. Moreover, if the speed of the stirring paddle is adjusted to be reduced, the stirring effect will also be reduced at the same time.

[0004] Chinese invention patent CN105013378A discloses a fertilizer crushing and mixing device for improving saline-alkali land, including a crushing unit, a screening unit, a conveying unit and a mixing unit. The mixing unit is a drum-type mixing agitator, the right side of the mixing agitator is a feed port, the left side of the mixing agitator is a discharge port, the feed port is connected to the crushing unit through the conveying unit, the crushing unit includes a crusher, the crusher is mounted on the crusher connecting rod, and an elastic support is provided between two adjacent crushers mounted on the crusher connecting rod. The crushing unit also includes a shell, and a screening unit is provided in the shell. The screening unit divides the shell into two upper and lower chambers, which are an upper chamber located at the upper part and equipped with the crushing unit and a lower chamber located at the lower part. Chinese utility model patent CN216137143U discloses an organic fertilizer mixing device suitable for salt-alkali tolerant rice in saline-alkali land, including a crushing box and a mixing box, a hydraulic telescopic rod, a threaded rod and a rolling plate are provided in the crushing box, a crushing knife is provided on the rolling plate, the threaded rod is threadedly connected to the baffle, a filter is provided on the bottom of the crushing box, and a mixing assembly is provided in the mixing box. The prior art does not solve the problem that the powder to be solved by the present invention is solid fine particles or powder, which has a large barrier effect on the stirring paddle and causes a series of effects caused by heat. Summary of the invention

[0005] The present invention is to overcome the shortcomings of the above-mentioned prior art and provide a mixing device for improving saline-alkali land. Various powders of the present invention enter the mixing barrel through different discharge barrels and fall evenly on the turntable. These powders are thrown to the outer edge under the action of the centrifugal force of the turntable and are blocked by the solid ring plate of the baffle ring plate. Under the rotation of the turntable, the powders dropped from the discharge barrels at different positions slide evenly to the periphery and stack together, and then spread out from all sides through the grid plate and fall, and then converge and intersect together and fall from the discharge pipe to the ground. Various powders are stacked and intertwined to ensure that the powders falling on the ground are relatively uniform, avoid friction with the stirring paddle, avoid damage to the powder structure or danger caused by heat generation, and improve efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a mixing device for improving saline-alkali land, comprising a mounting bracket, a mixing barrel is provided on the mounting bracket, a plurality of discharge barrels are circumferentially provided on the mixing barrel, the discharge pipes of the discharge barrels are connected to the upper side of the mixing barrel, and a discharge pipe is provided at the lower end of the mixing barrel; a turntable is provided in the mixing barrel, the turntable is driven to rotate by a driving mechanism, a baffle is provided under the turntable, the baffle comprises a baffle ring plate located at the outer edge of the turntable and a lifting part connected to the baffle ring plate, the baffle ring plate comprises a grid plate and a solid ring plate arranged on the lower side of the grid plate.

[0007] Preferably, the driving mechanism includes a hollow pillar arranged in the middle of the mixing barrel and a driving motor arranged above the mixing barrel, the upper end of the pillar is connected to the mixing barrel, the lower end of the pillar is provided with a swivel support, a through hole is provided in the middle of the turntable, the turntable is mounted on the swivel support through the through hole, and the swivel support is driven to rotate by the output end of the driving motor.

[0008] Preferably, the slewing support includes an upper ring and a lower ring, the upper ring is fixedly connected to the through hole in the middle of the turntable, a ring gear is provided on the inner side of the upper ring, the ring gear is meshed with a driving gear, and the output end of the driving motor is connected to the driving gear through a transmission shaft; the pillar is provided with an opening at the position corresponding to the driving gear.

[0009] Preferably, the blocker also includes a chassis located below the pillar, a vertical rod arranged on the chassis and a sliding sleeve arranged on the turntable, the chassis is connected to the material blocking ring plate through connecting ribs, one end of the vertical rod extends into the sliding sleeve and is provided with a block, a compression spring is sleeved on the vertical rod, one end of the compression spring rests on the block and the other end rests on the sliding sleeve; an inclined block is eccentrically provided on the chassis, and a top block corresponding to the inclined block is provided at the lower end of the pillar.

[0010] Preferably, an arc plate is provided on the outer side of the baffle ring plate, and a vibrator is provided on the arc plate.

[0011] Preferably, a funnel-shaped sieve plate is provided in the lower barrel, a flat plate is provided in the middle of the sieve plate, and leakage holes are provided on the flat plate; a crushing mechanism is also provided in the lower barrel, and the crushing mechanism includes a barbed plate located on the flat plate.

[0012] Preferably, a middle hole is provided in the middle of the plate, and the crushing mechanism also includes a pull rod and a sleeve, the sleeve is located in the middle hole, and the upper edge of the sleeve is aligned with the plate, the pull rod is slidably arranged in the sleeve, and the pull rod is driven to slide up and down by a driving part, and the barbed plate is arranged on the pull rod.

[0013] Preferably, a spiral sliding groove is provided on the inner side of the sleeve, and the pull rod is provided with a protrusion corresponding to the sliding groove.

[0014] Preferably, a slot is provided at one end of the pull rod, and the driving part comprises a push cylinder arranged parallel to the pull rod and a sleeve located in the slot, wherein the sleeve is connected to the output end of the push cylinder.

[0015] Preferably, a distributor is connected to the lower end of the discharge pipe, and the distributor includes a semi-conical shell and a semicircular shell. The upper end of the semi-conical shell is connected to the discharge pipe, and the lower side of the semi-conical shell is connected to the semicircular shell. A plurality of material spreading ports are provided under the semicircular shell.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: (1) Various powders enter the mixing barrel through different discharge barrels and fall evenly on the turntable. These powders are thrown to the outer edge under the action of the centrifugal force of the turntable and are blocked by the solid ring plate of the baffle ring plate. Under the rotation of the turntable, the powders falling from the discharge barrels at different positions slide evenly to the periphery and stack together, sliding the baffle ring plate downward. The grid plate replaces the solid ring plate to block the outer periphery of the turntable. The powders are scattered and fall from all sides, converge and intertwine together, and then fall from the discharge pipe to the ground. Various powders are stacked and intertwined together, ensuring that the powders falling on the ground are relatively uniform, avoiding friction with the stirring paddle, avoiding heat damage to the powder structure or danger, and improving efficiency.

[0017] (2) A ring of gears is provided on the inner side of the upper ring. The upper ring rotates to drive the turntable, and the lower ring serves as a support. The driving gear engages with the ring of gears through the opening to achieve a driving effect, thereby achieving the effect of rotating the turntable and mixing the fertilizer.

[0018] (3) As the turntable rotates, the sliding sleeve rotates accordingly, driving the chassis to rotate, and the material blocking ring plate rotates synchronously, reducing the friction between the turntable and the material blocking ring plate. At the same time, it can also make the two fit more tightly, reducing the leakage of powder from the gap between the two. When the inclined block on the chassis rotates to the top block, the top block lifts the inclined block, and the chassis drives the vertical rod to slide in the sliding sleeve. At the same time, the grid plate descends to replace the solid ring plate to block the outer periphery of the turntable. The powder falls from the grid. When the inclined block on the chassis passes the top block, the inclined block falls, and the vertical rod returns to its original position under the elastic force of the compression spring. The chassis moves upward, and the solid ring plate blocks the outer periphery of the turntable, once again achieving the effect of stacking and interlacing the powder.

[0019] (4) An arc plate is provided on the outer side of the baffle ring plate to facilitate the falling of the powder. A vibrator is provided on the arc plate to further vibrate and mix the powder falling on the arc plate to improve the mixing effect.

[0020] (5) There is a funnel-shaped screen plate in the discharge barrel, and a flat plate in the middle. The powder falls from the four sides of the discharge barrel onto the screen plate. The material that has not formed into a lump falls from the screen plate, and the lump material rolls onto the middle flat plate. The material is broken up by the barbed plate of the crushing mechanism and then leaks out from the leakage hole, achieving the effect of crushing the fertilizer.

[0021] (6) The push cylinder moves the pull rod up and down, driving the thorn plate to break the fertilizer, and the pull rod is rotated by the restriction of the slide groove and the protrusion, so that the thorn plate plays a better role in breaking the fertilizer. At the same time, the design of the slot and the ring ensures the rotation effect of the pull rod while transmitting the pull rod.

[0022] (7) Through the semi-conical shell and semi-circular shell arranged above and below, the mixture falling from the discharge pipe reaches the top of the semi-conical shell. When sliding from the top to the surroundings, the distance to the semi-circular shell is equal, so that the mixture is evenly scattered on the ground and will not accumulate in the middle, resulting in more in the middle and less around, or even interfering with the mixing effect of the mixture; the design structure of the semi-conical shell and the semi-circular shell is simple, easy to use, and saves cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side sectional view of the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of the driving mechanism and the blocker; Figure 3 for Figure 2 An enlarged schematic diagram at the slewing support; Figure 4 This is a cross-sectional view of the sliding sleeve and the vertical rod; Figure 5 It is a three-dimensional schematic diagram of the baffle ring plate; Figure 6 It is a cross-sectional view of the lower barrel; Figure 7 It is a three-dimensional cross-sectional view of the crushing mechanism; Figure 8 It is a three-dimensional schematic diagram of the distributor.

[0024] Description of reference numerals: 1-Mounting bracket; 2-mixing barrel, 21-turntable, 211-through hole, 22-discharging pipe, 23-arc plate, 24-vibrator; 3-driving mechanism, 31-pillar, 311-opening, 32-slewing support, 321-upper ring, 322-lower ring, 33-driving motor, 34-transmission shaft, 35-driving gear, 36-gear ring; 4-blocker, 41-blocking ring plate, 411-solid ring plate, 412-grid plate, 42-chassis, 421-oblique block, 43-connecting rib, 44-vertical rod, 441-block, 45-sliding sleeve, 46-compression spring, 47-top block; 5-feeding barrel, 51-feeding pipe, 52-sieve plate, 53-flat plate, 54-leaking hole, 55-middle hole; 6-crushing mechanism, 61-pull rod, 611-bump, 612-slot, 62-sleeve, 621-slideway, 63-thorn plate, 64-ring, 65-push cylinder; 7- material distributor, 71- semi-conical shell, 72- semi-circular shell, 73- material spreading port. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example The following is combined with Figure 1-6 The present invention is further described as follows: a mixing device for improving saline-alkali land with fertilizer, such as Figure 1 and 2 As shown, it includes a mounting bracket 1, on which a mixing barrel 2 is disposed, and a plurality of discharge barrels 5 are circumferentially disposed on the mixing barrel 2, and a discharge pipe 51 of the discharge barrel 5 is connected to the upper side of the mixing barrel 2, and a discharge pipe 22 is disposed at the lower end of the mixing barrel 2; a turntable 21 is disposed in the mixing barrel 2, and the turntable 21 is driven to rotate by a driving mechanism 3, and a baffle 4 is disposed under the turntable 21, and the baffle 4 includes a baffle ring plate 41 located at the outer edge of the turntable 21 and a lifting portion connected to the baffle ring plate 41, and the baffle ring plate 41 includes a grid plate 412 and a solid ring plate 411 disposed on the lower side of the grid plate 412.

[0027] Various powders enter the mixing barrel 2 through different discharge barrels 5 and fall evenly on the turntable 21. These powders are thrown to the outer edge under the action of the centrifugal force of the turntable 21 and are blocked by the solid ring plate 411 of the blocking ring plate 41. Under the rotation of the turntable 21, the powders dropped from the discharge barrels 5 at different positions slide evenly to the periphery and stack together, and the blocking ring plate 41 slides downward. The grid plate 412 replaces the solid ring plate 411 to block the outer periphery of the turntable 21. The powders are scattered and fall from all sides, converge and intertwine together, and finally fall from the discharge pipe 22 to the ground. Various powders are stacked and intertwined together, ensuring that the powders falling on the ground are relatively uniform, avoiding friction with the stirring paddle, avoiding damage to the powder structure or danger due to heat generation, and improving efficiency.

[0028] As shown in the figure, the driving mechanism 3 includes a hollow pillar 31 arranged in the middle of the mixing barrel 2 and a driving motor 33 arranged above the mixing barrel 2. The upper end of the pillar 31 is connected to the mixing barrel 2, and a swivel support 32 is provided at the lower end of the pillar 31. A through hole 211 is provided in the middle of the turntable 21. The turntable 21 is installed on the swivel support 32 through the through hole 211. The swivel support 32 is driven to rotate by the output end of the driving motor 33.

[0029] As shown in the figure, the slewing support 32 includes an upper ring 321 and a lower ring 322. The upper ring 321 is fixedly connected to the through hole 211 in the middle of the rotating disk 21. A ring gear 36 is provided inside the upper ring 321. The ring gear 36 is meshed with a driving gear 35. The output end of the driving motor 33 is connected to the driving gear 35 through a transmission shaft 34. The support 31 is provided with an opening 311 at a position corresponding to the driving gear 35. The upper ring 321 rotates to drive the rotating disk 21, and the lower ring 322 serves as a support. The driving gear 35 is meshed with the ring gear 36 through the opening 311, which plays a driving effect, thereby achieving the effect of rotating the rotating disk 21 and mixing fertilizers.

[0030] As shown in the figure, the blocker 4 also includes a chassis 42 located below the pillar 31, a vertical rod 44 arranged on the chassis 42 and a sliding sleeve 45 arranged on the turntable 21. The chassis 42 is connected to the material blocking ring plate 41 through a connecting rib 43. One end of the vertical rod 44 extends into the sliding sleeve 45 and is provided with a stopper 441. A compression spring 46 is sleeved on the vertical rod 44. One end of the compression spring 46 rests on the stopper 441 and the other end rests on the sliding sleeve 45. An inclined block 421 is eccentrically provided on the chassis 42, and a top block 47 corresponding to the inclined block 421 is provided at the lower end of the pillar 31.

[0031] As the turntable 21 rotates, the sliding sleeve 45 rotates accordingly, driving the chassis 42 to rotate, and the material-blocking ring plate 41 rotates synchronously, reducing the friction between the turntable 21 and the turntable 21, and at the same time, the two can be made to fit more tightly, reducing the leakage of powder from the gap between the two. When the inclined block 421 on the chassis 42 rotates to the top block 47, the top block 47 lifts the inclined block 421, and the chassis 42 drives the vertical rod 44 to slide in the sliding sleeve 45. At the same time, the grid plate 412 descends to replace the solid ring plate 411 to block the outer periphery of the turntable 21, and the powder falls from the grid. When the inclined block 421 on the chassis 42 passes the top block 47, the inclined block 421 falls, and the vertical rod 44 returns to its original position under the elastic force of the compression spring 46, the chassis 42 moves upward, and the solid ring plate 411 blocks the outer periphery of the turntable 21, once again achieving the effect of stacking and interlacing the powder.

[0032] As shown in the figure, an arc plate 23 is provided on the outer side of the baffle ring plate 41 to facilitate the falling of the powder. A vibrator is provided on the arc plate 23 to further vibrate and mix the powder falling on the arc plate 23 to improve the mixing effect.

[0033] As shown in the figure, a funnel-shaped sieve plate 52 is provided in the lower barrel 5 , a flat plate 53 is provided in the middle of the sieve plate 52 , and a leakage hole 54 is provided on the flat plate 53 ; a crushing mechanism 6 is also provided in the lower barrel 5 , and the crushing mechanism 6 includes a barbed plate 63 located on the flat plate 53 .

[0034] The powder material falls from the surrounding of the discharge barrel 5 onto the screen plate 52. The material that has not formed into agglomerates falls from the screen plate 52, and the material that has formed into agglomerates rolls onto the middle flat plate 53, and is broken up by the barbed plate 63 of the crushing mechanism 6, and then leaks out from the leaking hole 54, thereby achieving the effect of crushing the fertilizer.

[0035] As shown in the figure, a middle hole 55 is provided in the middle of the flat plate 53, and the crushing mechanism 6 also includes a pull rod 61 and a sleeve 62. The sleeve 62 is located in the middle hole 55, and the upper edge of the sleeve 62 is aligned with the flat plate 53. The pull rod 61 is slidably arranged in the sleeve 62, and the pull rod 61 is driven by the driving part to slide up and down, and the barbed plate 63 is arranged on the pull rod 61.

[0036] As shown in the figure, a spiral sliding groove 621 is provided on the inner side of the sleeve 62 , and a protrusion 611 corresponding to the sliding groove 621 is provided on the pull rod 61 .

[0037] As shown in the figure, a slot 612 is provided at one end of the pull rod 61 , and the driving part includes a push cylinder 65 arranged parallel to the pull rod 61 and a collar 64 located in the slot 612 , and the collar 64 is connected to the output end of the push cylinder 65 .

[0038] The pull rod 61 is moved up and down by the push cylinder 65, driving the thorn plate 63 to crush the fertilizer, and the pull rod 61 is rotated by the restriction of the slide groove 621 and the protrusion 611, so that the thorn plate 63 can play a better crushing role. At the same time, the design of the slot 612 and the ring 64 ensures the rotation effect of the pull rod 61 while transmitting the pull rod 61.

[0039] As shown in the figure, the lower end of the discharge pipe 22 is connected to the distributor 7, which includes a semi-conical shell 71 and a semicircular shell 72. The upper end of the semi-conical shell 71 is connected to the discharge pipe 22, and the lower side of the semi-conical shell 71 is connected to the semicircular shell 72. A plurality of material spreading ports 73 are provided under the semicircular shell 72.

[0040] The mixture falling from the discharge pipe 22 reaches the top of the semi-conical shell 71. When sliding down from the top to the surroundings, the distance to the semicircular shell 72 is equal, so that the mixture is evenly scattered on the ground and will not accumulate in the middle, resulting in more in the middle and less around, and even interfering with the mixing effect of the mixture; the design structure of the semi-conical shell 71 and the semicircular shell 72 is simple, easy to use, and saves cost.

[0041] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A mixing device for fertilizer for saline-alkali land improvement, comprising a mounting bracket (1), characterized in that: A mixing barrel (2) is provided on the mounting bracket (1), a plurality of lower barrels (5) are provided on the circumference of the mixing barrel (2), lower pipes (51) of the lower barrels (5) are connected to the upper side of the mixing barrel (2), and a discharge pipe (22) is provided at the lower end of the mixing barrel (2); A rotating disk (21) is provided in the mixing barrel (2), and the rotating disk (21) is driven to rotate by a driving mechanism (3). A stopper (4) is provided below the rotating disk (21), and the stopper (4) comprises a material stopper ring plate (41) located at the outer edge of the rotating disk (21) and a lifting portion connected to the material stopper ring plate (41). The material stopper ring plate (41) comprises a grid plate (412) and a solid ring plate (411) provided at the lower side of the grid plate (412).

2. A mixing device for improving saline-alkali land according to claim 1, characterized in that: The driving mechanism (3) comprises a hollow support (31) arranged in the middle of the mixing barrel (2) and a driving motor (33) arranged above the mixing barrel (2); the upper end of the support (31) is connected to the mixing barrel (2); the lower end of the support (31) is provided with a slewing support (32); a through hole (211) is provided in the middle of the rotating disk (21); the rotating disk (21) is mounted on the slewing support (32) via the through hole (211); and the slewing support (32) is driven to rotate by the output end of the driving motor (33).

3. A mixing device for improving saline-alkali land according to claim 2, characterized in that: The slewing support (32) comprises an upper ring (321) and a lower ring (322); the upper ring (321) is fixedly connected to a through hole (211) in the middle of the rotating disk (21); a ring gear (36) is provided inside the upper ring (321); a driving gear (35) is meshed with the ring gear (36); an output end of the driving motor (33) is connected to the driving gear (35) via a transmission shaft (34); and an opening (311) is provided at a position corresponding to the driving gear (35).

4. A mixing device for improving saline-alkali land according to claim 1, characterized in that: The blocker (4) further comprises a chassis (42) located below the support (31), a vertical rod (44) arranged on the chassis (42), and a sliding sleeve (45) arranged on the rotating disk (21); the chassis (42) is connected to the material blocking ring plate (41) via a connecting rib (43); one end of the vertical rod (44) extends into the sliding sleeve (45) and is provided with a stopper (441); a compression spring (46) is sleeved on the vertical rod (44); one end of the compression spring (46) abuts against the stopper (441) and the other end abuts against the sliding sleeve (45); An inclined block (421) is eccentrically provided on the chassis (42), and a top block (47) corresponding to the inclined block (421) is provided at the lower end of the support column (31).

5. The mixing device for fertilizer for saline-alkali land improvement according to claim 1, characterized in that: An arc plate (23) is provided on the outer side of the material blocking ring plate (41), and a vibrator is provided on the arc plate (23).

6. The mixing device for fertilizer for saline-alkali land improvement according to claim 1, characterized in that: A funnel-shaped sieve plate (52) is provided in the lower barrel (5), a flat plate (53) is provided in the middle of the sieve plate (52), and a material leakage hole (54) is provided on the flat plate (53); A crushing mechanism (6) is also provided in the lower barrel (5), and the crushing mechanism (6) comprises a thorn plate (63) located on the flat plate (53).

7. A mixing device for improving saline-alkali land according to claim 6, characterized in that: The plate (53) is provided with a middle hole (55) in the middle, and the crushing mechanism (6) further comprises a pull rod (61) and a sleeve (62), wherein the sleeve (62) is located in the middle hole (55), and the upper edge of the sleeve (62) is aligned with the plate (53), the pull rod (61) is slidably arranged in the sleeve (62), and the pull rod (61) is driven by a driving unit to slide up and down, and the thorn plate (63) is arranged on the pull rod (61).

8. A mixing device for fertilizer for improving saline-alkali land according to claim 7, characterized in that: A spiral sliding groove (621) is provided on the inner side of the sleeve (62), and the pull rod (61) is provided with a protrusion (611) corresponding to the sliding groove (621).

9. A mixing device for fertilizer for improving saline-alkali land according to claim 7, characterized in that: A slot (612) is provided at one end of the pull rod (61), and the driving unit comprises a push cylinder (65) arranged parallel to the pull rod (61) and a sleeve ring (64) located in the slot (612), wherein the sleeve ring (64) is connected to the output end of the push cylinder (65).

10. The mixing device for fertilizer for saline-alkali land improvement according to claim 1, characterized in that: The lower end of the discharge pipe (22) is connected to a distributor (7), and the distributor (7) comprises a semi-conical shell (71) and a semi-circular shell (72). The upper end of the semi-conical shell (71) is in communication with the discharge pipe (22), and the lower side of the semi-conical shell (71) is in communication with the semi-circular shell (72). A plurality of material dispensing openings (73) are provided below the semi-circular shell (72).

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