Device and method for preparing liquid fertilizer for conditioning acidified soil

Abstract

The invention relates to the technical field of fertilizer preparation, in particular to a device and method for preparing a liquid fertilizer for conditioning acidified soil, the device comprises a supporting table horizontally placed on the working ground, the top of the supporting table is provided with a stirring barrel, the bottom of the stirring barrel is provided with a liquid outlet pipe, and the liquid outlet pipe is provided with a control valve; a maintenance window is mounted on the outer side, close to the bottom, of the stirring barrel through bolts, a sealing part is mounted at the top of the stirring barrel, and a stirring assembly is mounted in the middle of the sealing part; the sealing part comprises a peripheral pipe fixed to the top end face of the stirring barrel through bolts, an outer ring plate is fixedly installed at the top of the peripheral pipe, an inner ring plate is rotatably installed on the inner wall of the outer ring plate, an inner disc is installed on the inner wall of the inner ring plate, and the outer ring plate and the inner disc are fixedly connected through a positioning rod; a material adding hole is formed in the inner ring plate; the stirring device has the characteristics of high stirring efficiency and high stirring uniformity.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer preparation, and in particular to a liquid fertilizer preparation device and method for conditioning acidified soil. Background Art

[0002] Soil acidification will reduce the effectiveness of nutrients in the soil, such as the loss of calcium, magnesium, potassium and other elements, and increase the solubility of toxic metal ions such as aluminum and manganese, which will have a toxic effect on crop growth. In addition, acidification of the soil will also destroy the soil structure, reduce the soil's ability to retain water and fertilizer, affect the activity of soil microorganisms, and thus affect the balance of the entire ecosystem.

[0003] As an efficient and convenient form of fertilizer, liquid fertilizer has unique advantages in conditioning acidified soil. Liquid fertilizer can be quickly absorbed by the soil, providing the necessary nutrients for crops, while also regulating soil pH and improving soil structure. Compared with traditional solid fertilizers, liquid fertilizers have the advantages of uniform fertilization, high utilization rate, and easy operation, so they have been increasingly widely used in modern agricultural production.

[0004] Liquid fertilizers used to treat acidified soil generally include amino acid liquid fertilizers, corrosive acid liquid fertilizers and alginic acid liquid fertilizers. Among them, humic acid in corrosive acid liquid fertilizers has a strong cation exchange capacity, which can absorb hydrogen ions in the soil and reduce soil acidity. It can improve soil structure, increase soil fertility and promote crop growth.

[0005] When stirring the raw materials during the preparation of corrosive acid liquid fertilizers, some insoluble impurities may be produced due to uneven stirring or incomplete local reaction. These insoluble impurities may exist in the liquid in the form of particles, resulting in the need for secondary screening of the evenly mixed liquid fertilizer after stirring, which is a cumbersome process.

[0006] Therefore, it is necessary to provide a liquid fertilizer preparation device and method for conditioning acidified soil to solve the above technical problems. Summary of the invention

[0007] In view of the problems in the prior art, the present invention provides a liquid fertilizer preparation device and method for conditioning acidified soil.

[0008] The technical solution adopted by the present invention to solve the technical problem is: a liquid fertilizer preparation device for conditioning acidified soil, comprising a support platform horizontally placed on a working ground, a stirring barrel installed on the top of the support platform, a liquid outlet pipe installed on the bottom of the stirring barrel, and a control valve provided on the liquid outlet pipe, a maintenance window installed on the outer side of the stirring barrel near the bottom thereof by bolts, a sealing part installed on the top of the stirring barrel, and a stirring assembly installed at the center of the sealing part; The sealing part includes an outer tube fixed to the top end face of the mixing barrel by bolts, an outer ring plate is fixedly installed on the top of the outer tube, an inner ring plate is rotatably installed on the inner wall of the outer ring plate, an inner disc is installed on the inner wall of the inner ring plate, and the outer ring plate and the inner disc are fixedly connected by a positioning rod, an axial hole is opened at the center position of the inner disc, a feeding hole is opened inside the inner ring plate, a fence ring plate is welded to the upper end face of the inner ring plate, and the feeding hole is located between the two fence ring plates; The stirring assembly includes a driving motor fixedly installed at the center position of the top of the inner disk, the output shaft of the driving motor is concentrically fixedly connected to the driving shaft, a V-shaped plate is fixedly installed on the bottom end face of the driving shaft, a stirring rod is rotatably inserted near the end of the V-shaped plate, a driving gear is concentrically installed on the top of the stirring rod, a stirring head is threadedly installed on the bottom of the stirring rod, the end of the stirring head is composed of multiple round rods, a spherical block is welded on the outer wall of the stirring rod, a ball head rack is sleeved on the outer side of the spherical block, the ball head rack is horizontally installed on the inner wall of the stirring barrel, a first bevel gear is concentrically sleeved on the outer wall of the driving shaft, the first bevel gear is connected to the inner disk through a fixed rod, and the first bevel gear is meshed with the driving gear.

[0009] Preferably, the outer wall of the stirring rod is symmetrically provided with a limiting circular groove, a limiting plug plate is arranged in the limiting circular groove, and one end of the limiting plug plate is fixed to the outer wall of the V-shaped plate.

[0010] Preferably, a through hole is opened at the center position of the interior of the stirring rod, a supporting ring is welded at the upper position of the inner wall of the through hole, a funnel is inserted at the top orifice of the through hole, and the bottom of the funnel is in contact with the upper end surface of the supporting ring but not connected, an inner sleeve is concentrically installed at the top edge of the funnel, a connecting pipe is rotatably installed on the outer wall of the inner sleeve, the top of the connecting pipe is fixedly connected to the lower end surface of the inner ring plate, and the top of the connecting pipe is located directly below the feeding hole, and a collection box is welded on the inner side of the round rod at the end of the stirring head, and through holes are opened on the outside and bottom of the collection box.

[0011] Preferably, the outer wall of the driving shaft is sleeved with a second bevel gear located directly above the first bevel gear, and the second bevel gear is fixedly connected to the fixed rod, the outer side of the second bevel gear is meshingly connected with a driven gear, and the driven gear is fixedly installed on the outer ring of the funnel, a cross bar is welded to the inner wall of the funnel, a straight rod is fixedly connected to the bottom of the cross bar, the straight rod is concentrically inserted in the through hole, a V-rod is installed at the bottom end of the straight rod, and the V-rod is located in the aggregate box.

[0012] Preferably, an annular guide plate is provided on the upper end surface of the inner ring plate and between the fence ring plates, and an inclination angle is provided on the upper end surface of the annular guide plate.

[0013] Preferably, the panel of the maintenance window is a component made of a transparent material.

[0014] Preferably, a steel ball is embedded in the connection between the inner sleeve and the connecting pipe.

[0015] In addition, the present invention also provides a V-shaped stone curtain wall dry hanging construction method, the V-shaped stone curtain wall dry hanging construction method specifically comprises the following steps: S1. Corrosive acid extraction: lignite or weathered coal with a humic acid content greater than 30% and a particle size greater than 60 mesh, NaOH or KOH, H3PO4, and water are added into a reaction kettle in a ratio of 1: (0.05-0.3): (0.01-0.2): (1-20) by mass percentage and stirred; React at 50-90℃ for 30-90min, and take the supernatant after natural sedimentation for 24h; S2. Clean the mixing barrel: rinse the inside of the mixing barrel with clean water, discharge the rinsed clean water through the liquid outlet pipe, and close the control valve of the liquid outlet pipe after the inside of the mixing barrel is dry; S3, adding raw materials: adding the supernatant extracted in S1 completely into the stirring barrel through the adding hole, and then adding the nutrient element raw materials into the stirring barrel through the adding hole in sequence, and the adding path of the nutrient element raw materials passes through the collecting box; S4, stirring reaction: start the driving motor, and control the stirring rod to stir the raw materials through the driving motor. The stirring time is 1-2 hours to prepare liquid fertilizer. After the stirring is completed, the insoluble impurities remaining from the raw material reaction remain in the collecting box; S5. Adjusting pH: After S4 is completed, open the control valve of the liquid outlet pipe, collect the liquid fertilizer after the stirring reaction, and add dilute sulfuric acid or sodium hydroxide solution to the collected liquid fertilizer to adjust the pH. After the adjustment is completed, it can be canned and stored.

[0016] Compared with the related art, the liquid fertilizer preparation device and method for conditioning acidified soil provided by the present invention have the following beneficial effects: (1) The present invention provides a liquid fertilizer preparation device and method for conditioning acidified soil. The present invention is provided with components such as a sealing part and a stirring assembly. By starting the driving motor, the stirring head at the bottom of the stirring rod can be controlled to make a circular motion in the direction of a top view, so as to perform primary stirring on the raw materials in the stirring barrel. At the same time, the driving gear and the stirring rod rotate on the V-shaped plate, that is, the stirring head rotates to perform secondary stirring on the raw materials in the stirring barrel. The dual stirring action increases the stirring uniformity and reduces the generation of insoluble impurities. (2) The present invention provides a liquid fertilizer preparation device and method for conditioning acidified soil. The present invention is provided with components such as an aggregate box. The aggregate box is stirred together with the stirring head. At the same time, all raw materials used for stirring enter through the through holes of the aggregate box. That is, insoluble impurities during the stirring of the raw materials can be isolated in the aggregate box by the through holes of the aggregate box and will not diffuse into the stirring barrel. There is no need for subsequent impurity screening. At the same time, the rotation of the straight rod drives the V-rod connected to its end to stir the raw materials inside the aggregate box, further improving the dissolution rate of the raw materials, thereby improving the stirring efficiency of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 Part of the structure of the present invention Figure 1 ; Figure 3 Part of the structure of the present invention Figure 2 ; Figure 4 It is a partial structural cross-sectional view of the present invention; Figure 5 For the present invention Figure 2 A partial enlarged schematic diagram of the middle A area; Figure 6 For the present invention Figure 4 A partial enlarged schematic diagram of the middle B area; Figure 7 is a flow chart of the present invention; Numbers in the figure: 1, support platform, 2, mixing barrel, 3, liquid outlet pipe, 4, sealing part, 5, mixing assembly, 21, maintenance window, 41, outer tube, 42, outer ring plate, 43, inner ring plate, 44, inner disc, 45, shaft hole, 46, feeding hole, 47, positioning rod, 48, fence ring plate, 51, driving motor, 52, driving shaft, 53, first bevel gear, 54, V-shaped plate, 55, stirring rod, 56, driving gear, 57. spherical block, 58. ball head rack, 59. stirring head, 551. limiting circular groove, 552. limiting plug plate, 553. through hole, 554. supporting ring, 555. funnel, 556. inner sleeve, 557. connecting pipe, 558. driven gear, 559. collecting box, 531. fixing rod, 532. second bevel gear, 533. cross rod, 534. straight rod, 535. V-rod, 481. annular guide plate. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0020] See also Figure 1-7 The liquid fertilizer preparation device and method for conditioning acidified soil of the present invention include a support platform 1 horizontally placed on a working ground, a stirring barrel 2 is installed on the top of the support platform 1, and the stirring barrel 2 is used to stir the raw materials of the liquid fertilizer, the raw materials include corrosive acid and nutrient element raw materials, wherein the nutrient element raw materials can be selected from ammonium nitrate, potassium dihydrogen phosphate, potassium sulfate or calcium chloride; A liquid outlet pipe 3 is installed at the bottom of the mixing barrel 2, and a control valve is provided on the liquid outlet pipe 3. A maintenance window 21 is installed on the outer side of the mixing barrel 2 near its bottom through bolts. A sealing part 4 is installed on the top of the mixing barrel 2. The sealing part 4 is used to seal the open part of the mixing barrel 2 to prevent excessive oxygen from entering during the mixing process. A stirring component 5 is installed at the center of the sealing part 4. The stirring component 5 fully stirs the raw materials in the mixing barrel 2. The sealing part 4 includes a peripheral tube 41 fixed to the top end surface of the mixing barrel 2 by bolts, and the two are detachable to facilitate subsequent maintenance; An outer ring plate 42 is fixedly installed on the top of the outer tube 41, and an inner ring plate 43 is rotatably installed on the inner wall of the outer ring plate 42. The outer ring plate 42 and the inner ring plate 43 are both composed of two semicircular shapes and fixed by bolts for easy subsequent installation. An inner disc 44 is installed on the inner wall of the inner ring plate 43, and the outer ring plate 42 and the inner disc 44 are fixedly connected by a positioning rod 47. An axial hole 45 is opened at the center of the inner disc 44, and a feeding hole 46 is opened inside the inner ring plate 43. A fence ring plate 48 is welded to the upper end surface of the inner ring plate 43, and the feeding hole 46 is located between the two fence ring plates 48. The outer ring plate 42 and the inner disc 44 can be understood as a whole with the inner disc 44 under the fixation of the positioning rod 47 and can be detached from each other, and the inner ring plate 43 can rotate between the outer ring plate 42 and the inner disc 44; The stirring assembly 5 includes a driving motor 51 fixedly mounted at the top center of the inner disc 44, the output shaft of the driving motor 51 is coaxially fixedly connected to the driving shaft 52, and the driving motor 51 can be started to drive the driving shaft 52 to rotate synchronously through the output shaft; A V-shaped plate 54 is fixedly installed on the bottom end surface of the driving shaft 52, and a stirring rod 55 is rotatably inserted near the end of the V-shaped plate 54. A stirring head 59 is installed at the bottom of the stirring rod 55 through a thread. The end of the stirring head 59 is composed of a plurality of round rods. A ball head frame 58 is horizontally installed on the inner wall of the mixing barrel 2. The V-shaped plate 54 rotates with the driving shaft 52. After the V-shaped plate 54 rotates, it drives the stirring rod 55 to move. Since a spherical block 57 is welded to the outer wall of the stirring rod 55, and a ball head frame 58 is sleeved on the outer side of the spherical block 57, the movement process of the stirring rod 55 can be understood as the spherical block 57 rotating relative to the ball head frame 58, and the stirring head 59 at the bottom of the stirring rod 55 makes a circular motion in the direction of the top view, so as to perform primary stirring on the raw materials in the mixing barrel 2. A driving gear 56 is concentrically installed on the top of the stirring rod 55, and a first bevel gear 53 is concentrically sleeved on the outer wall of the driving shaft 52. The first bevel gear 53 is connected to the inner disk 44 through a fixing rod 531, and the first bevel gear 53 is meshed with the driving gear 56. When the stirring rod 55 is driven by the V-shaped plate 54 to move, the driving gear 56 arranged on the top of the stirring rod 55 moves along the outer circle of the first bevel gear 53, and the two are meshed with each other, so that the driving gear 56 and the stirring rod 55 rotate on the V-shaped plate 54, that is, the stirring head 59 rotates to perform secondary stirring on the raw materials in the stirring barrel 2, further increasing the stirring effect, so that the mixing of the raw materials is more uniform and sufficient.

[0021] See also Figure 4 and Figure 6 The outer wall of the stirring rod 55 is symmetrically provided with a limited circular groove 551, and a limited plug plate 552 is arranged in the limited circular groove 551. One end of the limited plug plate 552 is fixed to the outer wall of the V-shaped plate 54. When the stirring head 59 rotates, the limited circular groove 551 rotates on the limited plug plate 552, and the limited plug plate 552 supports the limited circular groove 551, thereby increasing the stability of the rotation of the stirring rod 55 and preventing the stirring head 59 from sinking to the bottom. The thickness of the limiting plug plate 552 is smaller than the width of the limiting circular groove 551 , so that there is a certain displacement gap between the two.

[0022] In another embodiment, see Figure 2-Figure 6A through hole 553 is provided at the center of the stirring rod 55, a supporting ring 554 is welded at the upper position of the inner wall of the through hole 553, a funnel 555 is inserted at the top opening of the through hole 553, and the bottom of the funnel 555 is in contact with the upper end surface of the supporting ring 554 but not connected, an inner sleeve 556 is concentrically installed at the top edge of the funnel 555, a connecting pipe 557 is rotatably installed on the outer wall of the inner sleeve 556, the top of the connecting pipe 557 is fixedly connected to the lower end surface of the inner ring plate 43, and the connecting pipe The top of 557 is located directly below the feeding hole 46. When the stirring rod 55 performs primary stirring, it drives the funnel 555, the inner sleeve 556 and the connecting pipe 557 to move together. The connecting pipe 557 then drives the inner ring plate 43 to rotate between the outer ring plate 42 and the inner disc 44. When the stirring rod 55 performs secondary stirring, the inner sleeve 556 rotates on the inner wall of the connecting pipe 557. At this time, when feeding through the feeding hole 46, the raw materials can enter the stirring barrel 2 along the connecting pipe 557, the funnel 555 and the through hole 553; A material collection box 559 is welded to the inner side of the round rod at the end of the stirring head 59, and through holes are opened on the outer side and bottom of the material collection box 559. The material collection box 559 is stirred together with the stirring head 59, and all the raw materials used for stirring enter through the through holes of the material collection box 559. That is, the insoluble impurities during the stirring of the raw materials can be isolated in the material collection box 559 by the through holes, and will not diffuse into the stirring barrel 2, and there is no need for subsequent impurity screening.

[0023] In another embodiment, see Figure 2-Figure 6 The outer wall of the driving shaft 52 is sleeved with a second bevel gear 532 located just above the first bevel gear 53, and the second bevel gear 532 is fixedly connected to the fixing rod 531. The outer side of the second bevel gear 532 is meshedly connected with a driven gear 558, and the driven gear 558 is fixedly installed on the outer ring of the funnel 555. When performing primary stirring, the driven gear 558 moves with the funnel 555, so that the driven gear moves in a circle along the outer ring of the second bevel gear 532, and the driven gear 558 rotates at the same time; A cross bar 533 is welded to the inner wall of the funnel 555, and a straight rod 534 is fixedly connected to the bottom of the cross bar 533. The straight rod 534 is concentrically inserted in the through hole 553, and a V-rod 535 is installed at the bottom end of the straight rod 534, and the V-rod 535 is located in the collection box 559. The driven gear 558 drives the funnel 555 and the inner sleeve 556 to rotate between the connecting pipe 557 and the supporting ring 554 during the rotation process. Steel balls are embedded in the connection between the inner sleeve 556 and the connecting pipe 557 to reduce the friction between the two during relative rotation and reduce the wear between the two. The funnel 555 then drives the cross bar 533 and the straight rod 534 to rotate together. The rotation of the straight rod 534 drives the V-rod 535 connected to its end to stir the raw materials inside the collection box 559, further improving the dissolution rate of the raw materials, thereby improving the mixing efficiency of the raw materials.

[0024] like Figure 1-Figure 4 As shown, an annular guide plate 481 is provided on the upper end surface of the inner ring plate 43 and between the fence ring plates 48. An inclination is provided on the upper end surface of the annular guide plate 481. When adding raw materials, the raw materials can be directly poured between the two fence ring plates 48. The raw materials will flow along the inclined annular guide plate 481 to the feeding hole 46, thereby improving the convenience of adding raw materials.

[0025] See also Figure 1-Figure 2 The panel of the maintenance window 21 is a component made of a transparent material, and the original stirring state can be observed through the maintenance window 21 made of the transparent material; At the same time, the maintenance window 21 can be disassembled. After the present invention has been worked on for many times, the maintenance window 21 is removed. The stirring head 59 can be disassembled through the maintenance window 21, and the insoluble impurities remaining inside the stirring head 59 can be cleaned up. It should be noted that the driving direction of the driving motor 51 should be kept consistent with the tightening direction of the stirring head 59 relative to the stirring rod 55 as much as possible to prevent the stirring head 59 from loosening. In practice, a pin can also be set at the connection between the stirring head 59 and the stirring rod 55 for secondary reinforcement.

[0026] In addition, the present invention also provides a V-shaped stone curtain wall dry hanging construction method, the V-shaped stone curtain wall dry hanging construction method specifically comprises the following steps: S1. Corrosive acid extraction: lignite or weathered coal with a humic acid content greater than 30% and a particle size greater than 60 mesh, NaOH or KOH, H3PO4, and water are added into a reaction kettle in a ratio of 1: (0.05-0.3): (0.01-0.2): (1-20) by mass percentage and stirred; React at 50-90℃ for 30-90min, and take the supernatant after natural sedimentation for 24h; S2, cleaning the mixing barrel: flush the inside of the mixing barrel 2 with clean water, discharge the flushed clean water through the liquid outlet pipe 3, and close the control valve of the liquid outlet pipe 3 after the inside of the mixing barrel 2 is dry; S3, adding raw materials: the supernatant extracted in S1 is completely added into the stirring barrel 2 through the adding hole 46, and then the nutrient element raw materials are added into the stirring barrel 2 through the adding hole 46 in sequence, and the adding path of the nutrient element raw materials passes through the collecting box 559; Among them, the nutrient element raw materials are selected from ammonium nitrate, potassium dihydrogen phosphate, potassium sulfate or calcium chloride; S4, stirring reaction: start the driving motor 51, and control the stirring rod 55 to stir the raw materials through the driving motor 51, and the stirring time is 1-2 hours to prepare liquid fertilizer. After the stirring is completed, the insoluble impurities remaining from the raw material reaction remain in the collecting box 559; S5, adjusting pH: After S4 is completed, open the control valve of the liquid outlet pipe 3, collect the liquid fertilizer after the stirring reaction, and add dilute sulfuric acid or sodium hydroxide solution to the collected liquid fertilizer to adjust the pH. After the adjustment is completed, it can be canned and stored.

[0027] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid fertilizer preparation device for conditioning acidified soil, comprising a support platform (1) placed horizontally on a working surface, characterized in that: A stirring barrel (2) is installed on the top of the support platform (1), a liquid outlet pipe (3) is installed on the bottom of the stirring barrel (2), and a control valve is provided on the liquid outlet pipe (3); a maintenance window (21) is installed on the outside of the stirring barrel (2) near the bottom thereof by means of bolts; a sealing portion (4) is installed on the top of the stirring barrel (2), and a stirring assembly (5) is installed in the center of the sealing portion (4); The sealing portion (4) comprises an outer tube (41) fixed to the top end surface of the mixing barrel (2) by bolts, an outer ring plate (42) is fixedly mounted on the top of the outer tube (41), an inner ring plate (43) is rotatably mounted on the inner wall of the outer ring plate (42), an inner disc (44) is mounted on the inner wall of the inner ring plate (43), and the outer ring plate (42) and the inner disc (44) are fixedly connected by a positioning rod (47), an axial hole (45) is opened at a central position inside the inner disc (44), a feeding hole (46) is opened inside the inner ring plate (43), a fence ring plate (48) is welded to the upper end surface of the inner ring plate (43), and the feeding hole (46) is located between the two fence ring plates (48); The stirring assembly (5) comprises a driving motor (51) fixedly mounted at a central position on the top of the inner disc (44); the output shaft of the driving motor (51) is coaxially fixedly connected to the driving shaft (52); a V-shaped plate (54) is fixedly mounted on the bottom end surface of the driving shaft (52); a stirring rod (55) is rotatably inserted near the end of the V-shaped plate (54); a driving gear (56) is coaxially mounted on the top of the stirring rod (55); and a stirring head (56) is threadedly mounted on the bottom of the stirring rod (55). 9), the end of the stirring head (59) is composed of a plurality of round rods, a spherical block (57) is welded to the outer wall of the stirring rod (55), a ball head frame (58) is sleeved on the outer side of the spherical block (57), and the ball head frame (58) is horizontally installed on the inner wall of the stirring barrel (2), and a first bevel gear (53) is sleeved at a concentric position on the outer wall of the driving shaft (52), and the first bevel gear (53) is connected to the inner disc (44) through a fixing rod (531), and the first bevel gear (53) is meshed with the driving gear (56).

2. A liquid fertilizer preparation device for conditioning acidified soil according to claim 1, characterized in that: The outer wall of the stirring rod (55) is symmetrically provided with a limiting circular groove (551), a limiting plug plate (552) is arranged in the limiting circular groove (551), and one end of the limiting plug plate (552) is fixed to the outer wall of the V-shaped plate (54).

3. A liquid fertilizer preparation device for conditioning acidified soil according to claim 2, characterized in that: A through hole (553) is provided at a central position inside the stirring rod (55), a supporting ring (554) is welded at an upper position on the inner wall of the through hole (553), a funnel (555) is inserted at the top opening of the through hole (553), and the bottom of the funnel (555) contacts but is not connected to the upper end surface of the supporting ring (554), an inner sleeve (556) is concentrically mounted at the top edge of the funnel (555), a connecting pipe (557) is rotatably mounted on the outer wall of the inner sleeve (556), the top of the connecting pipe (557) is fixedly connected to the lower end surface of the inner ring plate (43), and the top of the connecting pipe (557) is located directly below the feeding hole (46), and a material collecting box (559) is welded to the inner side of the round rod at the end of the stirring head (59), and through holes are provided on the outer side and bottom of the material collecting box (559).

4. A liquid fertilizer preparation device for conditioning acidified soil according to claim 3, characterized in that: A second bevel gear (532) is sleeved on the outer wall of the driving shaft (52) and located directly above the first bevel gear (53), and the second bevel gear (532) is fixedly connected to the fixing rod (531). A driven gear (558) is meshedly connected to the outer side of the second bevel gear (532), and the driven gear (558) is fixedly mounted on the outer ring of the funnel (555). A cross bar (533) is welded to the inner wall of the funnel (555), and a straight rod (534) is fixedly connected to the bottom of the cross bar (533). The straight rod (534) is concentrically inserted into the through hole (553), and a V-shaped rod (535) is mounted on the bottom end of the straight rod (534), and the V-shaped rod (535) is located in the collecting box (559).

5. A liquid fertilizer preparation device for conditioning acidified soil according to claim 4, characterized in that: An annular guide plate (481) is provided on the upper end surface of the inner ring plate (43) and between the fence ring plates (48), and the upper end surface of the annular guide plate (481) is provided with an inclination.

6. A liquid fertilizer preparation device for conditioning acidified soil according to claim 5, characterized in that: The panel of the maintenance window (21) is a component made of a transparent material.

7. A liquid fertilizer preparation device for conditioning acidified soil according to claim 6, characterized in that: A steel ball is embedded in the connection between the inner sleeve (556) and the connecting pipe (557).

8. The liquid fertilizer preparation device for conditioning acidified soil according to claim 7, characterized in that: A method for preparing a liquid fertilizer for conditioning acidified soil comprises the following steps: S1. Corrosive acid extraction: lignite or weathered coal with a humic acid content greater than 30% and a particle size greater than 60 mesh, NaOH or KOH, H3PO4, and water are placed in a reaction kettle in a ratio of 1: (0.05-0.3): (0.01-0.2): (1-20) by mass percentage and stirred; React at 50-90℃ for 30-90min, and take the supernatant after natural sedimentation for 24h; S2, cleaning the mixing barrel: flushing the inside of the mixing barrel (2) with clean water, discharging the clean water after flushing through the liquid outlet pipe (3), and closing the control valve of the liquid outlet pipe (3) after the inside of the mixing barrel (2) is dry; S3, adding raw materials: the supernatant extracted in S1 is completely added into the stirring barrel (2) through the adding hole (46), and then the nutrient element raw materials are added into the stirring barrel (2) through the adding hole (46) in sequence, and the adding path of the nutrient element raw materials passes through the collecting box (559); S4, stirring reaction: starting the driving motor (51), and controlling the stirring rod (55) to stir the raw materials through the driving motor (51), and the stirring time is 1-2 hours to prepare liquid fertilizer. After the stirring is completed, the insoluble impurities remaining from the raw material reaction remain in the collecting box (559); S5, pH adjustment: After S4 is completed, the control valve of the liquid outlet pipe (3) is opened to collect the liquid fertilizer after the stirring reaction, and dilute sulfuric acid or sodium hydroxide solution is added to the collected liquid fertilizer to adjust the pH. After the adjustment is completed, the liquid fertilizer can be canned and stored.

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