Preparation device and preparation method of saline alkali soil conditioning fertilizer

Abstract

The invention relates to the technical field of soil improvement, in particular to a saline alkali soil conditioning fertilizer preparation device which comprises a machine body, a sliding opening is formed in the top of the machine body, a rotating rod is slidably inserted into the sliding opening, and a plurality of stirring rods are fixedly mounted on the surface of the rotating rod; a rotating shaft is vertically and rotatably mounted on the upper surface of the machine body, chain wheels fixedly sleeve the rotating shaft and an output shaft of the driving motor, a chain is meshed and wound on the two chain wheels, reciprocating threads are formed in the surface of the rotating shaft, a sliding plate sleeves the rotating shaft in a threaded manner, and an I-shaped wheel fixedly sleeves the top end of a rotating rod. Under the cooperation of the rotating shaft, the sliding plate, the I-shaped wheel, the chain wheel and the chain, when the driving motor drives the rotating rod and the plurality of stirring rods to rotate, the plurality of stirring rods can do vertical reciprocating motion, so that the stirring and mixing efficiency can be improved, and meanwhile, the problem of non-uniform raw material mixing caused by stirring dead angles is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of soil improvement, and in particular to a preparation device and a preparation method of a saline-alkali soil conditioning fertilizer. Background Art

[0002] Saline-alkali soil is widely distributed around the world. Its high salt-alkali content seriously restricts the growth of crops and the development of agriculture. Therefore, it is necessary to prepare fertilizers that can regulate the salt-alkali content in saline-alkali soil through preparation equipment. During the preparation process, the collected raw materials need to be crushed, ground, stirred, fermented and dried.

[0003] The stirring mechanism in the preparation device usually stirs and mixes the crushed and ground raw materials through multiple stirring rods. Since the multiple stirring rods can only rotate in one plane, the raw materials are mainly stirred in the horizontal direction, and the stirring efficiency is poor. At the same time, since the horizontal position of the stirring rod does not change, a stirring dead angle will be generated between two vertically adjacent stirring rods. The raw materials located in this space cannot contact the stirring rod and cannot be mixed evenly. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: the stirring mechanism in the preparation device usually stirs and mixes the crushed and ground raw materials through multiple stirring rods. Since the multiple stirring rods can only rotate in one plane, the raw materials are mainly stirred in the horizontal direction, and the stirring efficiency is poor. At the same time, since the horizontal position of the stirring rod will not change, a stirring dead angle will be generated between two vertically adjacent stirring rods. The raw materials located in this space cannot contact the stirring rod and cannot be mixed evenly. A preparation device for saline-alkali soil conditioning fertilizer is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A preparation device for saline-alkali soil conditioning fertilizer, comprising a body, a stirring chamber is provided in the body, a sliding opening is provided on the top of the body, a rotating rod is slidably inserted in the sliding opening, a plurality of stirring rods are fixedly installed on the surface of the rotating rod in a circular shape, an L-shaped placement plate is fixedly installed on the upper surface of the body, a driving motor is fixedly installed on the upper surface of the placement plate, an output shaft of the driving motor passes through the placement plate, and is fixedly connected to the top of the rotating rod through a telescopic component;

[0007] A rotating shaft is vertically rotatably mounted on the upper surface of the machine body, sprockets are fixedly sleeved on the rotating shaft and the output shaft of the driving motor, chains are meshed and wound around the two sprockets, a reciprocating thread is provided on the surface of the rotating shaft, and a slide plate is threadedly sleeved on the rotating shaft, the slide plate is restricted in rotation by a restricting component, a cross bar is fixedly mounted on the surface of the slide plate, an I-shaped wheel is fixedly sleeved on the top end of the rotating rod, and an end of the cross bar away from the slide plate is located inside the I-shaped wheel.

[0008] Preferably, the limiting component comprises a limiting rod vertically fixedly mounted on the upper surface of the machine body, and the sliding plate is slidably sleeved on the limiting rod.

[0009] Preferably, the telescopic component includes a first vertical rod and a second vertical rod, the top end of the first vertical rod is fixedly connected to the bottom end of the output shaft of the driving motor, and a sliding groove is opened at the bottom end, the second vertical rod is slidably inserted in the sliding groove, and the bottom end of the second vertical rod is fixedly connected to the top end of the rotating rod, and the cross-sectional shape of the sliding groove and the second vertical rod is the same, and neither is circular.

[0010] Preferably, the second vertical rod sliding seal is inserted in the slide groove, the first vertical rod is fixedly mounted with a first air inlet pipe on the surface of the first vertical rod, the first air outlet pipe is symmetrically fixedly mounted with a first air cavity on the surface of the first vertical rod, the rotating rod is provided with a plurality of rectangular openings on the surface of the rotating rod, one end of the plurality of stirring rods respectively covers the plurality of rectangular openings, and horizontal grooves are provided on each of the plurality of stirring rods, a plurality of air vents connected with the horizontal grooves are provided on the surface of the stirring rod, the bottom end of the first air outlet pipe extends into the air cavity, and a first one-way valve is provided in both the first air inlet pipe and the first air outlet pipe.

[0011] Preferably, a rolling ball is rotatably mounted on one end of the cross bar away from the skateboard, and the surface of the rolling ball is in rolling contact with the upper and lower inner surfaces of the I-shaped wheel.

[0012] Preferably, a heat dissipation component is provided on the upper surface of the placement plate, and the heat dissipation component is used to dissipate heat from the drive motor.

[0013] Preferably, the heat dissipation assembly includes a cylinder, an insertion rod and a ball fixedly mounted at the bottom end of the insertion rod, a mounting opening is provided on the surface of the mounting plate, the cylinder is vertically fixedly mounted on the upper surface of the mounting plate, and a slot is vertically provided at the bottom end, the cylinder covers the mounting opening, the insertion rod is slidably inserted in the mounting opening, and is slidably and sealably inserted in the slot, a plurality of hemispheres are fixedly mounted on the upper surface of the chain, the ball is located on the moving path of the plurality of hemispheres, the top end of the insertion rod is fixedly connected to the groove wall of the slot by a telescopic spring, the top end of the cylinder is connected to the housing of the driving motor through a second air inlet pipe, a second air outlet pipe is fixedly mounted on the surface of the cylinder, and a second one-way valve is provided in both the second air inlet pipe and the second air outlet pipe.

[0014] Preferably, two F-shaped clamping plates are fixedly mounted on the lower surface of the placement plate, the chain is located in the clamping openings of the two clamping plates, and the upper and lower surfaces are in sliding contact with the clamping plates.

[0015] Preferably, fixing plates with a triangular longitudinal section are fixedly mounted on the upper and lower surfaces of the stirring rod, and the bottom end of the rotating rod is conical.

[0016] A method for preparing a saline-alkali soil conditioning fertilizer, the preparation method comprising the following steps:

[0017] S1: First, the raw materials are collected, crushed and ground by a crushing device, and then dried or soaked according to the properties of the raw materials and subsequent process requirements;

[0018] S2: Determine the fertilizer formula according to the characteristics of saline-alkali soil and the improvement target, put the pre-treated raw materials into the machine body according to the designed formula, start the drive motor, control the rotating rod to rotate with multiple stirring rods, so as to stir and mix the raw materials;

[0019] S3: taking out the mixed raw materials from the body and subjecting them to fermentation treatment;

[0020] S4: The fermented raw materials are made into granules by a granulator, and the formed granules are dried. The dried fertilizer is then packaged according to a certain weight or volume.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. With the cooperation between the rotating shaft, the slide plate, the I-shaped wheel, the sprocket and the chain, when the driving motor drives the rotating rod and the multiple stirring rods to rotate, the multiple stirring rods will also reciprocate vertically, so that the raw materials can be fully turned in the vertical direction, which can improve the mixing efficiency. At the same time, since the horizontal height position of the multiple stirring rods can be changed, the problem of uneven mixing of raw materials caused by the dead angle of stirring is also reduced;

[0023] 2. Through the coordination among the telescopic component, the rectangular opening, the transverse groove, the first air inlet pipe and the first air outlet pipe, the external air can be sucked into the air cavity and discharged from the multiple vents during the stirring of the raw materials by the stirring rod. The discharged air can contact the raw materials, provide oxygen for aerobic microorganisms, and promote their growth and reproduction. At the same time, ventilation can help regulate the humidity and temperature of the materials during the stirring process. When the air is introduced, it can take away part of the moisture in the raw materials to prevent the raw materials from agglomerating due to excessive moisture. During the stirring process, the material temperature may rise due to mechanical friction and other factors. The introduced air can take away the heat to avoid the damage of the nutrients in the fertilizer raw materials due to excessive temperature, and the introduction of air is conducive to the oxidation-reduction reaction.

[0024] 3. When the drive motor is started, the chain will also rotate with the cooperation between the two sprockets. At this time, the heat dissipation component can absorb the hot air accumulated in the drive motor casing and discharge it to the outside, so as to avoid the drive motor working for a long time and accumulating a large amount of hot air in its casing, which may cause the drive motor to short-circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front perspective structural schematic diagram of a saline-alkali soil conditioning fertilizer preparation device proposed by the present invention;

[0026] Figure 2 It is a partial three-dimensional cross-sectional structural schematic diagram of a preparation device for saline-alkali soil conditioning fertilizer proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the placement plate in the preparation device for saline-alkali soil conditioning fertilizer proposed by the present invention;

[0028] Figure 4 It is a schematic diagram of a partial three-dimensional cross-sectional structure of a chain and a heat dissipation component in a preparation device for saline-alkali soil conditioning fertilizer proposed by the present invention;

[0029] Figure 5 This is a schematic diagram of a partial three-dimensional split structure of a transfer rod in a preparation device for saline-alkali soil conditioning fertilizer proposed by the present invention;

[0030] Figure 6 This is a schematic diagram of a partial three-dimensional cross-sectional structure at the top of a rotating rod in a preparation device for saline-alkali soil conditioning fertilizer proposed by the present invention;

[0031] Figure 7 for Figure 3 The enlarged structural diagram at A in the middle;

[0032] Figure 8 for Figure 3 The enlarged structural diagram at B in the middle;

[0033] Fig. 9 for Figure 4 The enlarged structural diagram at C in the middle;

[0034] Fig.10 for Figure 5 Enlarged structural diagram at D in the middle.

[0035] In the figure: 1 body, 2 stirring chamber, 3 rotating rod, 4 stirring rod, 5 placement plate, 6 driving motor, 7 rotating shaft, 8 sprocket, 9 chain, 10 slide plate, 11 cross bar, 12 I-shaped wheel, 13 limiting rod, 14 first vertical rod, 15 second vertical rod, 16 first air inlet pipe, 17 first air outlet pipe, 18 air cavity, 19 rectangular opening, 20 vent, 21 rolling ball, 22 cylinder, 23 plug rod, 24 ball, 25 slot, 26 hemisphere, 27 second air inlet pipe, 28 second air outlet pipe, 29 telescopic spring, 30 clamping plate, 31 fixing plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely 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 the embodiments.

[0037] Reference Figure 1-Figure 10 , a preparation device for saline-alkali soil conditioning fertilizer, comprising a body 1, a stirring chamber 2 is provided in the body 1, a sliding opening is provided on the top of the body 1, a rotating rod 3 is slidably inserted in the sliding opening, a plurality of stirring rods 4 are fixedly installed on the surface of the rotating rod 3 in a circular shape, an L-shaped mounting plate 5 is fixedly installed on the upper surface of the body 1, a driving motor 6 is fixedly installed on the upper surface of the mounting plate 5, the output shaft of the driving motor 6 passes through the mounting plate 5 and is fixedly connected to the top end of the rotating rod 3 through a telescopic component, the telescopic component comprises a first vertical rod 14 and a second vertical rod 15, the top end of the first vertical rod 14 is fixedly connected to the bottom end of the output shaft of the driving motor 6, and a sliding groove is provided at the bottom end, the second vertical rod 15 is slidably inserted in the sliding groove, the bottom end of the second vertical rod 15 is fixedly connected to the top end of the rotating rod 3, the cross-sectional shape of the sliding groove and the second vertical rod 15 is the same, and neither is circular.

[0038] A rotating shaft 7 is vertically rotatably mounted on the upper surface of the machine body 1, and sprockets 8 are fixedly sleeved on the rotating shaft 7 and the output shaft of the driving motor 6, and chains 9 are meshed and wound on the two sprockets 8. A reciprocating thread is provided on the surface of the rotating shaft 7, and a slide plate 10 is threadedly sleeved on the rotating shaft 7. The slide plate 10 is restricted in rotation by a limiting component. The limiting component includes a limiting rod 13 vertically fixedly mounted on the upper surface of the machine body 1, and the slide plate 10 is slidably sleeved on the limiting rod 13. A cross bar 11 is fixedly mounted on the surface of the slide plate 10, and an I-shaped wheel 12 is fixedly sleeved at the top of the rotating rod 3, and the end of the cross bar 11 away from the slide plate 10 is located in the I-shaped wheel 12.

[0039] First, the crushed and ground raw materials are put into the stirring chamber 2, and then the driving motor 6 is started. At this time, the first vertical rod 14, the second vertical rod 15 and the rotating rod 3 will all rotate, and the multiple stirring rods 4 fixedly mounted on the surface of the rotating rod 3 will also rotate with the rotating rod 3. Under the transmission action of the two sprockets 8 and the chain 9, the rotating shaft 7 will also rotate, and the slide plate 10 threadedly sleeved on the rotating shaft 7 will carry the cross bar 11 to perform vertical reciprocating movement under the restriction action of the restriction rod 13. During the movement, since one end of the cross bar 11 is located in the I-shaped wheel 12, the I-shaped wheel 12 will move together with the cross bar 11, and then the rotating rod 3 will also carry the multiple stirring rods 4 to perform vertical reciprocating movement together. In this process, the second vertical rod 15 will perform vertical reciprocating movement in the slide groove. When the multiple stirring rods 4 reciprocate vertically, the raw materials can be fully turned over in the vertical direction, which can improve the efficiency of stirring and mixing. At the same time, since the horizontal height position of the multiple stirring rods 4 can be changed, the problem of uneven mixing of raw materials caused by stirring dead angles is also reduced.

[0040] The second vertical rod 15 is slidably sealed and inserted in the slide groove, the first vertical rod 14 is fixedly mounted with a first air inlet pipe 16 on the surface of the first vertical rod 14, the first air outlet pipe 17 is symmetrically fixedly mounted with a first vertical rod 14, an air cavity 18 is opened in the rotating rod 3, a plurality of rectangular openings 19 are opened on the surface of the rotating rod 3, one end of a plurality of stirring rods 4 respectively covers the plurality of rectangular openings 19, and a horizontal groove is opened horizontally, a plurality of air vents 20 connected with the horizontal groove are opened on the surface of the stirring rod 4, the bottom end of the first air outlet pipe 17 extends into the air cavity 18, the first air inlet pipe 16 and the first air outlet pipe 17 are both provided with a first one-way valve, the conduction direction of the first one-way valve in the first air inlet pipe 16 is from the outside to the slide groove, and the conduction direction of the first one-way valve in the first air outlet pipe 17 is from the slide groove to the air cavity 18.

[0041] When the second vertical rod 15 moves vertically back and forth in the chute, the space volume between the top of the second vertical rod 15 and the wall of the chute will continuously change from small to large and then from large to small. When the space volume becomes larger, the pressure decreases, and the air in the outside will enter the chute from the first air inlet pipe 16. When the space volume becomes smaller, the pressure increases, and the air in the chute will enter the air cavity 18 from the first air outlet pipe 17, and then enter the multiple horizontal grooves from the multiple rectangular openings 19, and finally be discharged from the multiple air vents 20. The discharged air can contact with the raw materials, provide oxygen for aerobic microorganisms, and promote their growth and reproduction. At the same time, ventilation can help regulate the humidity and temperature of the materials during the mixing process. When air is introduced, it can take away part of the moisture in the raw materials to prevent the raw materials from agglomerating due to excessive moisture. During the mixing process, the material temperature may increase due to factors such as mechanical friction. The air introduced can take away the heat to prevent the nutrients in the fertilizer raw materials from being damaged by excessive temperature, and the introduction of air is conducive to the oxidation-reduction reaction. For example, some raw materials may contain reducing substances such as ferrous ions. After the air is introduced, the ferrous ions can be oxidized to ferric ions. This oxidation process can change the chemical properties of the raw materials, so that the fertilizer can play a better role after being applied to saline-alkali soil. For example, iron ions can react with some alkaline substances in the soil to adjust the pH of the soil. The introduction of air can also promote the emission of some volatile substances in the raw materials. For example, during the stirring process, some harmful gases or odorous substances in the raw materials can be discharged with the flow of air. At the same time, it is also beneficial for the raw materials to better absorb some beneficial gas components, such as carbon dioxide. Carbon dioxide can react with some alkaline components in the raw materials and has a certain auxiliary effect on adjusting the pH of the soil.

[0042] A ball 21 is rotatably mounted on one end of the cross bar 11 away from the skateboard 10. The surface of the ball 21 rolls in contact with the upper and lower surfaces of the I-shaped wheel 12. The ball 21 can reduce the friction between the contact surfaces of the cross bar 11 and the I-shaped wheel 12, so that the rotation of the I-shaped wheel 12 will not be stuck.

[0043] A heat dissipation component is provided on the upper surface of the placement plate 5, and the heat dissipation component is used to drive the heat dissipation of the motor 6. The heat dissipation component includes a cylinder 22, a plug rod 23 and a ball 24 fixedly installed at the bottom end of the plug rod 23. A mounting opening is provided on the surface of the placement plate 5. The cylinder 22 is vertically fixedly installed on the upper surface of the placement plate 5, and a slot 25 is vertically provided at the bottom end. The cylinder 22 covers the mounting opening, and the plug rod 23 is slidably inserted in the mounting opening and slidably and sealably inserted in the slot 25. A plurality of hemispheres 26 are fixedly installed on the upper surface of the chain 9, and the ball 24 is located at a plurality of hemispheres. On the moving path of the body 26, the top end of the insertion rod 23 is fixedly connected to the groove wall of the slot 25 through the telescopic spring 29, and the top end of the cylinder 22 is connected to the shell of the driving motor 6 through the second air inlet pipe 27. The second air outlet pipe 28 is fixedly installed on the surface of the cylinder 22. The second air inlet pipe 27 and the second air outlet pipe 28 are both provided with a second one-way valve. The conduction direction of the second one-way valve in the second air inlet pipe 27 is from the shell of the driving motor 6 to the slot 25, and the conduction direction of the second one-way valve in the second air outlet pipe 28 is from the slot 25 to the outside.

[0044] When the output shaft of the driving motor 6 is rotating, the chain 9 will also run, so that the multiple hemispherical bodies 26 located on the upper surface of the chain 9 will intermittently abut against the ball 24. When the hemispherical bodies 26 abut against the ball 24, the ball 24 will move up with the insertion rod 23 under the action of the arc surface pressure, and the telescopic spring 29 will shrink. At this time, the space volume between the top of the insertion rod 23 and the groove wall of the slot 25 will become smaller, and when the hemispherical bodies 26 no longer abut against the ball 24, the ball 24 and the insertion rod 23 will also quickly move under the elastic potential energy of the telescopic spring 29. The plug 23 is quickly moved downward to reset. At this time, the volume of the space between the top of the plug rod 23 and the wall of the slot 25 will increase. When the volume of the space increases, the pressure decreases, and the hot air in the housing of the drive motor 6 will enter the slot 25 from the second air inlet pipe 27. When the volume of the space decreases, the pressure increases, and the hot air in the slot 25 will be discharged to the outside from the second air outlet pipe 28, thereby achieving the effect of heat dissipation for the drive motor 6, avoiding the drive motor 6 from working for a long time, accumulating a lot of heat in its housing, and causing the drive motor 6 to work in a high temperature environment for a long time, which may cause a short circuit.

[0045] Two F-shaped clamping plates 30 are fixedly mounted on the lower surface of the placement plate 5 . The chain 9 is located in the clamping openings of the two clamping plates 30 , and the upper and lower surfaces of the chain 9 are in sliding contact with the clamping plates 30 .

[0046] The two clamping plates 30 can limit the vertical movement of the chain 9, thereby preventing the chain 9 from moving downward when the abutting ball 24 abuts against the hemispherical body 26, thereby improving the stability of the operation of the chain 9.

[0047] The upper and lower surfaces of the stirring rod 4 are fixedly mounted with a fixing plate 31 with a triangular longitudinal section, and the bottom end of the rotating rod 3 is conical. The fixing plate 31 with a triangular longitudinal section and the conical bottom end of the rotating rod 3 can both reduce the resistance of the stirring rod 4 during the vertical movement in the raw material.

[0048] A method for preparing a saline-alkali soil conditioning fertilizer, the preparation method comprising the following steps:

[0049] S1: First, the raw materials are collected, crushed and ground by a crushing device, and then dried or soaked according to the properties of the raw materials and subsequent process requirements;

[0050] S2: Determine the fertilizer formula according to the characteristics of saline-alkali soil and the improvement target, put the pre-treated raw materials into the machine body 1 according to the designed formula, start the drive motor 6, control the rotating rod 3 to rotate with the multiple stirring rods 4, so as to stir and mix the raw materials;

[0051] S3: taking the mixed raw materials out of the body 1 and fermenting them;

[0052] S4: The fermented raw materials are made into granules by a granulator, and the formed granules are dried. The dried fertilizer is then packaged according to a certain weight or volume.

[0053] In the present invention, the driving motor 6 is started, and the first vertical rod 14, the second vertical rod 15 and the rotating rod 3 will all rotate. The multiple stirring rods 4 fixedly mounted on the surface of the rotating rod 3 will also rotate with the rotating rod 3. Under the transmission action of the two sprocket wheels 8 and the chain 9, the rotating shaft 7 will also rotate, and the slide plate 10 threadedly sleeved on the rotating shaft 7 will carry the cross bar 11 to perform vertical reciprocating movement under the limiting action of the limiting rod 13. During the movement, since one end of the cross bar 11 is located in the I-shaped wheel 12, the I-shaped wheel 12 will move together with the cross bar 11, and then the rotating rod 3 will also carry the multiple stirring rods 4 to reciprocate vertically. In this process, the telescopic component will reciprocate and retract. When the multiple stirring rods 4 reciprocate vertically, the raw materials can be fully turned over in the vertical direction, which can improve the efficiency of stirring and mixing. At the same time, since the horizontal height position of the multiple stirring rods 4 can be changed, the problem of uneven mixing of raw materials caused by stirring dead angles is also reduced.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for preparing saline-alkali soil conditioning fertilizer, comprising a body (1), characterized in that: A stirring chamber (2) is provided in the machine body (1), a sliding opening is provided at the top of the machine body (1), a rotating rod (3) is slidably inserted in the sliding opening, a plurality of stirring rods (4) are fixedly installed on the surface of the rotating rod (3) in a circular shape, an L-shaped mounting plate (5) is fixedly installed on the upper surface of the machine body (1), a driving motor (6) is fixedly installed on the upper surface of the mounting plate (5), an output shaft of the driving motor (6) passes through the mounting plate (5) and is fixedly connected to the top end of the rotating rod (3) through a telescopic component; A rotating shaft (7) is vertically rotatably mounted on the upper surface of the machine body (1); a sprocket (8) is fixedly sleeved on the rotating shaft (7) and the output shaft of the driving motor (6); a chain (9) is meshed and wound on the two sprockets (8); a reciprocating thread is provided on the surface of the rotating shaft (7); a slide plate (10) is threadedly sleeved on the rotating shaft (7); the slide plate (10) is restricted in rotation by a restriction component; a cross bar (11) is fixedly mounted on the surface of the slide plate (10); an I-shaped wheel (12) is fixedly sleeved on the top end of the rotating rod (3); and an end of the cross bar (11) away from the slide plate (10) is located inside the I-shaped wheel (12).

2. The device for preparing saline-alkali soil conditioning fertilizer according to claim 1, characterized in that: The limiting component comprises a limiting rod (13) vertically fixedly mounted on the upper surface of the machine body (1), and the sliding plate (10) is slidably sleeved on the limiting rod (13).

3. The preparation device of a saline-alkali soil conditioning fertilizer according to claim 1, characterized in that: The telescopic component comprises a first vertical rod (14) and a second vertical rod (15); the top end of the first vertical rod (14) is fixedly connected to the bottom end of the output shaft of the driving motor (6), and a slide groove is provided at the bottom end; the second vertical rod (15) is slidably inserted in the slide groove; the bottom end of the second vertical rod (15) is fixedly connected to the top end of the rotating rod (3); the cross-sectional shapes of the slide groove and the second vertical rod (15) are the same and are not circular.

4. The device for preparing saline-alkali soil conditioning fertilizer according to claim 3, characterized in that: The second vertical rod (15) is inserted into the slide groove in a sliding sealing manner, a first air inlet pipe (16) is fixedly mounted on the surface of the first vertical rod (14), a first air outlet pipe (17) is symmetrically fixedly mounted on the surface of the first vertical rod (14), an air cavity (18) is provided in the rotating rod (3), a plurality of rectangular openings (19) are provided on the surface of the rotating rod (3), one end of the plurality of stirring rods (4) respectively covers the plurality of rectangular openings (19), and a horizontal groove is provided on each of the plurality of stirring rods (4), a plurality of air vents (20) connected to the horizontal groove are provided on the surface of the stirring rod (4), the bottom end of the first air outlet pipe (17) extends into the air cavity (18), and a first one-way valve is provided in each of the first air inlet pipe (16) and the first air outlet pipe (17).

5. The device for preparing saline-alkali soil conditioning fertilizer according to claim 1, characterized in that: A rolling ball (21) is rotatably mounted on one end of the crossbar (11) away from the slide plate (10), and the surface of the rolling ball (21) is in rolling contact with the upper and lower surfaces of the inner side of the I-shaped wheel (12).

6. The device for preparing saline-alkali soil conditioning fertilizer according to claim 1, characterized in that: The upper surface of the placement plate (5) is provided with a heat dissipation component, and the heat dissipation component is used to dissipate heat from the drive motor (6).

7. The device for preparing saline-alkali soil conditioning fertilizer according to claim 6, characterized in that: The heat dissipation assembly comprises a cylinder (22), an insertion rod (23) and a ball (24) fixedly mounted at the bottom end of the insertion rod (23); a mounting opening is provided on the surface of the placement plate (5); the cylinder (22) is vertically fixedly mounted on the upper surface of the placement plate (5) and a slot (25) is vertically provided at the bottom end; the cylinder (22) covers the mounting opening; the insertion rod (23) is slidably inserted in the mounting opening and slidably and sealably inserted in the slot (25); a ball (24) is fixedly mounted on the upper surface of the chain (9); A plurality of hemispherical bodies (26), the abutting ball (24) is located on the moving path of the plurality of hemispherical bodies (26), the top end of the insert rod (23) is fixedly connected to the groove wall of the slot (25) via a telescopic spring (29), the top end of the cylinder (22) is connected to the housing of the drive motor (6) via a second air inlet pipe (27), a second air outlet pipe (28) is fixedly mounted on the surface of the cylinder (22), and a second one-way valve is provided in both the second air inlet pipe (27) and the second air outlet pipe (28).

8. The device for preparing saline-alkali soil conditioning fertilizer according to claim 7, characterized in that: Two F-shaped clamping plates (30) are fixedly mounted on the lower surface of the placement plate (5); the chain (9) is located in the clamping openings of the two clamping plates (30), and the upper and lower surfaces are in sliding contact with the clamping plates (30).

9. The device for preparing saline-alkali soil conditioning fertilizer according to claim 1, characterized in that: A fixing plate (31) with a triangular longitudinal section is fixedly mounted on the upper and lower surfaces of the stirring rod (4), and the bottom end of the rotating rod (3) is conical.

10. A method for preparing a saline-alkali soil conditioning fertilizer, characterized in that: The preparation method comprises the following steps: S1: First, the raw materials are collected, crushed and ground by a crushing device, and then dried or soaked according to the properties of the raw materials and subsequent process requirements; S2: Determine the fertilizer formula according to the characteristics of the saline-alkali soil and the improvement target, put the pre-treated raw materials into the machine body (1) according to the designed formula, start the drive motor (6), control the rotating rod (3) to rotate with the multiple stirring rods (4), so as to stir and mix the raw materials; S3: taking out the mixed raw materials from the body (1) and subjecting them to fermentation; S4: The fermented raw materials are made into granules by a granulator, and the formed granules are dried. The dried fertilizer is then packaged according to a certain weight or volume.

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