Mixing device and application thereof in preparation of water-retaining fertilizer type composite water-soluble fertilizer

Abstract

The invention discloses a mixing device and application thereof in preparation of a water-retaining fertilizer type composite water-soluble fertilizer, and belongs to the technical field of composite water-soluble fertilizer production.The mixing device comprises a main body mechanism, a supporting mechanism is arranged on the main body mechanism, and a batching mechanism and a premixing mechanism are arranged at the top of the main body mechanism; through cooperative use of the batching mechanism and the premixing mechanism, proportioning, premixing and stirring mixing can be integrated, the fertilizer raw material transferring step is reduced, the fertilizer preparation step is simple, the mixing convenience of the fertilizer raw materials can be improved, the mixing efficiency of the fertilizer raw materials can also be improved, and large-scale production is easy; the mixing tank A and the tank cover are of a split structure, and the lifting mechanism and the turnover mechanism are matched for use, so that the tank cover can be lifted and turned over, the effect of conveniently opening the tank cover to disassemble, maintain and overhaul the mixing assembly is achieved, and the use is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of composite water-soluble fertilizer production, in particular to a mixing device and application thereof in preparing water-retaining composite water-soluble fertilizer. Background Art

[0002] With the continuous growth of the global population and the increasing shortage of arable land resources, improving crop yields and quality has become the key to agricultural development. Although traditional chemical fertilizers can quickly provide nutrients, their utilization rate is low and they are easy to lose, causing serious pollution to the environment. Therefore, water-retaining and fertilizer-retaining composite water-soluble fertilizers came into being. Through scientific proportions, it effectively combines water-soluble fertilizers with water-retaining agents, fertilizer-retaining agents, etc., which significantly improves the utilization rate of fertilizers, reduces nutrient loss, and reduces the impact on the environment. In recent years, as the concept of sustainable agricultural development has been deeply rooted in the hearts of the people, water-retaining and fertilizer-retaining composite water-soluble fertilizers have received widespread attention and recognition in the global agricultural field due to their environmental protection and high efficiency. When producing water-retaining and fertilizer-retaining composite water-soluble fertilizers, it is necessary to use a mixing device to mix a variety of raw materials evenly so that they can achieve the effect of water and fertilizer retention.

[0003] The existing utility model patent document with announcement number CN221693379U discloses a fertilizer mixing device for fertilizer production. By driving the feed auger to rotate, the feed auger can transport the fertilizer at the bottom end of the mixing tank to the top, which helps to quickly mix the fertilizers in different parts of the upper and lower parts. At the same time, the fertilizer is stirred by rotating the stirring shaft and the stirring shaft drives the stirring support rod to rotate and stir the fertilizer, thereby improving the mixing efficiency of fertilizer production.

[0004] Although the above-mentioned fertilizer mixing device for fertilizer production can solve the corresponding technical problems, it only has a mixing function, and a separate proportioning operation is required before the fertilizer is mixed, which reduces the convenience of fertilizer mixing. At the same time, its mixing tank is an integrated structure, which makes it difficult to open the mixing tank, and is not convenient for subsequent maintenance and repair of its internal structure. Therefore, a mixing device and its application in the preparation of water-retaining fertilizer type composite water-soluble fertilizer are proposed. Summary of the invention

[0005] The technical task of the present invention is to provide a mixing device and its application in the preparation of water-retaining fertilizer type composite water-soluble fertilizer to solve the above-mentioned problems.

[0006] To achieve the above object, the present invention provides the following technical solutions: A mixing device comprises a main body, a supporting mechanism is arranged on the main body, a batching mechanism and a pre-mixing mechanism are arranged on the top of the main body, a plurality of batching mechanisms and pre-mixing mechanisms are respectively arranged in a ring shape and are equidistantly distributed, the driving mechanism is located between the plurality of pre-mixing mechanisms, a lifting mechanism is arranged on the supporting mechanism, and a turning mechanism is arranged on the lifting mechanism; Wherein, the main body mechanism is used to stir and mix the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer; The supporting mechanism is used to support the main body mechanism and the lifting mechanism; The batching mechanism is used to store the raw materials of water-retaining fertilizer type composite water-soluble fertilizer; The premixing mechanism is used to premix the raw materials for storing the water-retaining fertilizer type composite water-soluble fertilizer; The driving mechanism is used to drive the main body mechanism and the premixing mechanism to rotate; The lifting mechanism is used to drive the main body to perform lifting operations; The turning mechanism is used to drive the main body mechanism, the batching mechanism, the premixing mechanism and the driving mechanism to perform turning operations.

[0007] Preferably, the main body mechanism comprises a mixing tank A with a conical structure, the top of the mixing tank A is buckled with a tank cover, the bottom of the mixing tank A is connected with a discharge pipe, the discharge pipe is installed with a valve A, and the inner cavity of the mixing tank A is provided with a mixing component; The mixing assembly comprises a T-shaped rod disposed above the inner cavity of the mixing tank A, a stirring piece A capable of stirring and mixing the raw materials in the middle of the inner cavity of the mixing tank A is disposed at the center of the bottom of the T-shaped rod, and a stirring piece B capable of stirring and mixing the raw materials around the inner cavity of the mixing tank A is disposed at each end of the T-shaped rod, wherein the length of one of the stirring pieces B is greater than the length of the other stirring piece B, a scraper is disposed on the side of the stirring piece B close to the inner wall of the mixing tank A, one side of the scraper is in contact with the inner wall of the mixing tank A, and the driving mechanism is located above the T-shaped rod; The batching mechanism comprises a hopper located above the tank cover, the discharge end of the hopper is connected to the tank cover through a premixing mechanism, the feed end of the hopper is threadedly connected to a stopper, and the stopper is provided with two storage parts for storing fertilizer raw materials; The material storage member comprises a material barrel fixedly penetrating the stop cover, the top end of the material barrel is connected with a feed pipe, the top end of the feed pipe is threadedly connected with a pipe cover, the bottom end of the material barrel is connected with a discharge pipe, and the discharge pipe is installed with a valve B and a solid flow meter arranged up and down; The premixing mechanism comprises a mixing tank B connected to the discharge end of the hopper, the bottom of the mixing tank B is connected to a material guide pipe, a valve C is installed on the material guide pipe, and the inner cavity of the mixing tank B is provided with a stirring element C for premixing the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer in the inner cavity of the mixing tank B; The stirring member C comprises a rotating rod C horizontally arranged in the inner cavity of the mixing tank B, one end of the rotating rod C is rotatably connected to the inner wall surface of the mixing tank B through a bearing, and the other end of the rotating rod C is movable through the outside of the mixing tank B, and two groups of symmetrically arranged stirring blades C are fixedly connected to the surface of the rotating rod C, and each group of stirring blades C is equidistantly arranged along the length direction of the rotating rod C, and the driving mechanism is located at the extended end of the rotating rod C; The lifting mechanism comprises a cylinder A and a cylinder B symmetrically mounted on the top of the support ring, the flip mechanism is arranged at the output end of the cylinder A, and a connecting piece is arranged between the output end of the cylinder B and the tank cover; The flipping mechanism includes a support plate fixedly connected to the output end of the cylinder A, two symmetrical support plates are fixedly connected to the top of the support plate, a support is rotatably connected between the two support plates, the support is fixedly connected to the tank cover, a groove is opened on the support, a worm gear is fixedly connected to the inner cavity of the groove, a motor C is installed on the top of the support plate, the output shaft of the motor C is fixedly connected to a worm meshing with the worm gear, the end of the worm gear away from the motor C is rotatably connected to a support block, and the bottom of the support block is fixedly connected to the support plate.

[0008] Preferably, the stirring member A comprises a rotating rod A fixedly connected to the bottom center of the T-shaped rod, and a plurality of groups of stirring blades arranged in layers up and down are fixedly connected to the surface of the rotating rod A, and each group of stirring blades has four stirring blades distributed equidistantly in a ring shape.

[0009] Preferably, the stirring member B includes a protective shell detachably connected to the end of the T-shaped rod and located on the side of the rotating rod A, the inner cavity of the protective shell is installed with a motor A, the output shaft of the motor A is fixedly connected to the rotating rod B, the bottom end of the rotating rod B passes through the inner cavity of the mixing tank A, the surface of the rotating rod B is fixedly connected with a spiral blade, and the scraper is detachably connected to the surface of the protective shell.

[0010] Preferably, the support mechanism comprises a support ring fixedly sleeved on the surface of the mixing tank A, and at least three supporting legs equidistantly distributed in a ring shape are fixedly connected to the bottom of the support ring.

[0011] Preferably, the driving mechanism includes a mounting plate fixedly connected between a plurality of hoppers, a motor B is mounted on the bottom of the mounting plate, an output shaft of the motor B is vertically fixedly connected to a connecting rod, the bottom end of the connecting rod movably penetrates into the inner cavity of the tank cover and is detachably connected to a T-shaped rod, a driving bevel gear is fixedly connected to the surface of the connecting rod, and an extended end of the rotating rod C is fixedly connected to a driven bevel gear meshing with the driving bevel gear.

[0012] Preferably, the connecting member includes an I-shaped block fixedly connected to the output end of the cylinder B, and a convex plate is fixedly connected to the side of the tank cover surface away from the support plate, and a through hole is formed on the convex plate for the I-shaped block to pass through, and the thickness of the convex plate is adapted to the distance between the upper plate and the lower plate of the I-shaped block.

[0013] Preferably, the top of one of the mixing tanks B is connected to a water pipe A, one end of the water pipe A is connected to a hose A, the hose A is connected to an external water tank via an external water pump, and a valve D and a liquid flow meter A are installed on the water pipe A.

[0014] Preferably, the top of the tank cover is connected to two water pipes B, one end of each of the two water pipes B is connected to a hose B, one of the hoses B is connected to an external acid solution tank via an external water pump, and the other hose B is connected to an external alkaline solution tank via an external water pump, a valve E and a liquid flow meter B are installed on the water pipes B, and a pH sensor is installed in the inner cavity of the mixing tank A.

[0015] The present invention also provides an application of a mixing device in preparing a water-retaining fertilizer type composite water-soluble fertilizer, which specifically comprises the following steps: S1. Prepare raw materials: The water-retaining fertilizer type composite water-soluble fertilizer includes main components and auxiliary components. The main components are made of the following raw materials in weight percentage: nitrogen source 10%-40%, phosphorus source 5%-35%, potassium source 10%-35%, organic acid 1%-5%; the auxiliary components are made of the following raw materials in weight percentage: water retaining agent 0.5%-2%, fertilizer retaining agent 0.5%-5%, trace elements 0.1%-2%, wherein the organic acid is citric acid, the water retaining agent is sodium polyacrylate or polyacrylamide, and the fertilizer retaining agent is sodium humate or potassium humate, and the raw material preparation operation is completed; S2. Classified material storage: Turn the tube cover to pour the raw materials into the barrel through the feed pipe, so that the water retaining agent and the fertilizer retaining agent are respectively placed in the two barrels in the hopper above the water pipe A, and the nitrogen source, phosphorus source, potassium source, organic acid and trace elements are respectively placed in other barrels, and the classified material storage operation can be completed; S3, raw material proportioning: open valve B, the raw material in the barrel can be discharged through the discharge pipe, the solid flow meter detects the flow of the raw material inside the discharge pipe, when the amount of raw material detected by the fixed flow meter matches the preset value, close valve B, so that the amount of raw material is accurately controlled, the raw material is introduced into the inner cavity of the mixing tank B through the hopper for temporary storage, and the raw material proportioning operation can be completed; S4, premixing: start the motor B, the output shaft of the motor B drives the connecting rod and the active bevel gear to rotate, the active bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the rotating rod C and the stirring blade C to rotate, so that the raw materials in the inner cavity of the mixing tank B can be stirred to obtain a mixture A; at the same time, by starting the external water pump, the water in the external water tank is transported to the inner cavity of the corresponding mixing tank B through the hose A and the water pipe A, and the liquid flow meter A detects the flow of water in the water pipe A. When the liquid flow meter A detects that the water consumption matches the preset value, the valve D is closed, so that the water consumption is accurately controlled, and the stirring blade C continues to rotate so that the water retaining agent and the fertilizer retaining agent are respectively dissolved in the water to obtain a mixture B, and the raw material premixing operation is completed; S4, stirring and mixing: open valve C, so that mixture A and mixture B in mixing tank B fall into the inner cavity of mixing tank A respectively, and the connecting rod also drives the T-shaped rod to rotate, and the T-shaped rod drives the rotating rod A, stirring blades, protective shell, motor A, rotating rod B, spiral blades and scrapers to rotate synchronously, so that the stirring blades can stir and mix mixture A and mixture B in the middle of the inner cavity of mixing tank A, and the spiral blades rotate around the central axis of mixing tank A to form a revolution, so as to stir and mix mixture A and mixture B around the inner cavity of mixing tank A, and start motor A at the same time, and the output shaft of motor A drives the rotating rod B and spiral blades to rotate, so that the spiral blades rotate around the central axis of rotating rod B to form a self-rotation, so that the raw materials in the inner cavity of mixing tank A can be lifted upward, avoiding the existence of a stirring blind area, so that mixture A and mixture B in mixing tank A can be fully mixed and evenly mixed, and the raw material stirring and mixing operation can be completed; S5. Adjusting pH value: starting the external water pump, transferring the acidic liquid in the external acidic solution tank or the alkaline liquid in the external alkaline solution tank to the inner cavity of the mixing tank A through the hose B and the water pipe B, and the liquid flow meter B detecting the flow of the acidic liquid or the alkaline liquid in the water pipe B. When the liquid flow meter B detects that the acidic liquid or the alkaline liquid matches the preset value, the valve E is closed, so that the amount of the acidic liquid or the alkaline liquid is accurately controlled, and the stirring blade and the spiral blade continue to rotate and stir until the pH detected by the pH sensor reaches the specified pH value, and the pH value adjustment operation is completed; opening the valve A, the material in the mixing tank A can be discharged through the tank cover for subsequent drying, crushing and screening processes, and finally the water-retaining fertilizer type composite water-soluble fertilizer can be obtained; S6. Maintenance and overhaul: start cylinder A and cylinder B, the output end of cylinder A drives the flip mechanism to move upward, the output end of cylinder B drives the connecting piece to move upward, the flip mechanism and the connecting piece drive the tank cover to move upward together, the tank cover drives the mixing component, the flip mechanism, the driving mechanism, the pre-mixing mechanism and the dosing mechanism to move upward synchronously for a distance, so that the connection between the T-bar and the connecting rod is exposed, at this time, the mixing component and the driving mechanism can be disassembled first, the disassembled mixing component is temporarily placed in the inner cavity of the mixing tank A, the I-shaped block is rotated so that the I-shaped block is aligned with the through hole, the through hole can be unlocked, and then the motor C is started, the output shaft of the motor C drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the support to rotate with the rotating shaft as the center, the support drives the tank cover, the driving mechanism, the pre-mixing mechanism and the dosing mechanism to rotate synchronously, so as to realize the flipping and opening operation of the tank cover, at this time, the mixing component can be completely taken out from the inner cavity of the mixing tank A for maintenance and overhaul; on the contrary, the above steps can be reversed to complete the reset operation.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The present invention, through the coordinated use of the batching mechanism and the premixing mechanism, can integrate proportioning, premixing and stirring and mixing, reduce the fertilizer raw material transportation steps, simplify the fertilizer preparation steps, improve the mixing convenience of the fertilizer raw materials, and improve the mixing efficiency of the fertilizer raw materials, and facilitate large-scale production; 2. The present invention adopts a split structure for the mixing tank A and the tank cover, and uses a lifting mechanism and a flipping mechanism in coordination, so that the tank cover can be lifted and flipped, so that the tank cover can be opened to disassemble, maintain and overhaul the mixing component, and the use is more convenient; 3. The present invention significantly improves the water and fertilizer retention capacity of fertilizers in the soil by adding a specific proportion of water retaining agent and fertilizer retaining agent, reduces fertilizer loss, and improves fertilizer utilization rate; at the same time, the addition of organic acid helps to improve soil structure, promote the development of crop roots, and improve the biological effectiveness of fertilizers; trace elements can provide various nutrients required for crop growth, promote the healthy growth of crops, and improve yield and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional schematic diagram of the structure of a mixing device according to an embodiment of the present invention Figure 1 ; Figure 2 A three-dimensional schematic diagram of the structure of a mixing device according to an embodiment of the present invention Figure 2 ; Figure 3 It is a structural stereoscopic schematic diagram of a mixing device according to an embodiment of the present invention, in which the tank cover is in an ascending state; Figure 4 A three-dimensional schematic diagram of the structure of the mixing device according to an embodiment of the present invention, in which the tank cover is in an open state; Figure 5 It is a structural stereoscopic schematic diagram of a mixing assembly, a premixing mechanism and a driving mechanism of a mixing device according to an embodiment of the present invention; Figure 6 It is a structural stereoscopic schematic diagram of a mixing assembly, a stirring element C and a driving mechanism of a mixing device according to an embodiment of the present invention; Figure 7 It is a schematic diagram of a three-dimensional cross-section of the structure of a batching mechanism and a pre-mixing mechanism of a mixing device according to an embodiment of the present invention; Figure 8 It is a structural three-dimensional schematic diagram of a tank cover, a cylinder A and a turning mechanism of a mixing device according to an embodiment of the present invention; Fig. 9 It is a schematic exploded perspective view of the structure of the flipping mechanism of the mixing device according to an embodiment of the present invention; Fig.10 The present invention is a flow chart of the use of a mixing device according to an embodiment of the present invention in preparing a water-retaining fertilizer type composite water-soluble fertilizer.

[0019] In the figure: 100, main body; 110, mixing tank A; 120, tank cover; 130, discharge pipe; 140, mixing assembly; 141, T-bar; 142, stirring element A; 1421, rotating rod A; 1422, stirring blade; 143, stirring element B; 1431, protective shell; 1432, motor A; 1433, rotating rod B; 1434, spiral blade; 144, scraper; 200, supporting mechanism; 210, supporting ring; 220, supporting leg; 300, batching mechanism; 310, hopper; 311, blocking cover; 320, material storage member; 321, barrel; 322, feed pipe; 323, pipe cover; 324, discharge pipe; 330, reinforcement rod; 400, pre-mixing mechanism; 410, mixing tank B; 420, material guide pipe; 430, stirring element C; 431, rotating rod C; 432, stirring blade C; 500, driving mechanism; 510, mounting plate; 520, motor B; 530, connecting rod; 540, driving bevel gear; 550, driven bevel gear; 600, lifting mechanism; 610, cylinder A; 620, cylinder B; 630, I-shaped block; 640, convex plate; 650, through hole; 700, turning mechanism; 710, supporting plate; 720, supporting plate; 730, supporting seat; 740, groove; 750, worm gear; 760, motor C; 770, worm; 780, supporting block; 800, water pipe A; 900. Water pipe B. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1-Figure 9 As shown, a mixing device according to an embodiment of the present invention comprises a main body mechanism 100, on which a supporting mechanism 200 is arranged, a batching mechanism 300 and a premixing mechanism 400 are arranged in sequence from top to bottom on the top of the main body mechanism 100, and a plurality of batching mechanisms 300 and premixing mechanisms 400 are respectively distributed in a ring shape and at equal intervals, a driving mechanism 500 is arranged at the center of the top of the main body mechanism 100, and the driving mechanism 500 is located between the plurality of premixing mechanisms 400, a lifting mechanism 600 is arranged on the supporting mechanism 200, and a flipping mechanism 700 is arranged on the lifting mechanism 600; The main body 100 is used to stir and mix the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer; The supporting mechanism 200 is used to support the main mechanism 100 and the lifting mechanism 600; The batching mechanism 300 is used to store the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer; The premixing mechanism 400 is used to premix the raw materials for storing the water-retaining fertilizer type composite water-soluble fertilizer; The driving mechanism 500 is used to drive the main mechanism 100 and the pre-mixing mechanism 400 to rotate; The lifting mechanism 600 is used to drive the main mechanism 100 to perform lifting operations; The turning mechanism 700 is used to drive the main mechanism 100, the batching mechanism 300, the premixing mechanism 400 and the driving mechanism 500 to perform a turning operation.

[0023] like Figure 1-Figure 9 As shown, the main mechanism 100 provided in this embodiment includes a mixing tank A110 with a conical structure, a tank cover 120 is buckled on the top of the mixing tank A110, a discharge pipe 130 is connected to the bottom of the mixing tank A110, a valve A is installed on the discharge pipe 130, and a mixing assembly 140 is provided in the inner cavity of the mixing tank A110; The mixing assembly 140 includes a T-shaped rod 141 disposed above the inner cavity of the mixing tank A110, a stirring piece A142 capable of stirring and mixing the raw materials in the middle of the inner cavity of the mixing tank A110 is disposed at the center of the bottom of the T-shaped rod 141, and stirring pieces B143 capable of stirring and mixing the raw materials around the inner cavity of the mixing tank A110 are disposed at both ends of the T-shaped rod 141 at an angle, wherein the length of one stirring piece B143 is greater than the length of the other stirring piece B143, and the stirring pieces B143 are arranged at an angle. A scraper 144 is provided on one side close to the inner wall of the mixing tank A110. One side of the scraper 144 contacts the inner wall of the mixing tank A110. The driving mechanism 500 is located above the T-shaped rod 141. The driving mechanism 500 drives the T-shaped rod 141 to rotate, thereby driving the stirring member A142, the stirring member B143 and the scraper 144 to rotate synchronously, so as to achieve the stirring and mixing operation of the raw materials in the inner cavity of the mixing tank A110 and the scraping operation of the raw materials adhering to the inner wall of the mixing tank A110. The stirring member A142 includes a rotating rod A1421 vertically fixedly connected to the center of the bottom of the T-shaped rod 141, and a plurality of groups of stirring blades 1422 arranged in layers are fixedly connected to the surface of the rotating rod A1421. Each group of stirring blades 1422 is annularly distributed with four stirring blades 1422 at equal intervals, and the lengths of the stirring blades 1422 decrease from top to bottom. When the T-shaped rod 141 rotates, the stirring member A142 can be driven to rotate synchronously, thereby stirring and mixing the raw materials in the middle of the inner cavity of the mixing tank A110; The stirring member B143 includes a protective shell 1431 which is detachably connected to the end of the T-shaped rod 141 through a flange and is located on the side of the rotating rod A1421. The inner cavity of the protective shell 1431 is installed with a motor A1432. The output shaft of the motor A1432 is fixedly connected to the rotating rod B1433. The bottom end of the rotating rod B1433 passes through the inner cavity of the mixing tank A110. The surface of the rotating rod B1433 is fixedly connected with a spiral blade 1434. The scraper 144 is detachably connected to the surface of the protective shell 1431 through a screw. When the T-shaped rod 141 rotates, it can drive The stirring piece B143 rotates synchronously to realize the spiral blade 1434 rotating around the central axis of the mixing tank A110 to form an orbital revolution, thereby stirring and mixing the raw materials around the inner cavity of the mixing tank A110. At the same time, the output shaft of the motor A1432 can drive the spiral blade 1434 to rotate, so that the spiral blade 1434 rotates around the central axis of the rotating rod B1433 to form a self-rotation, thereby lifting the raw materials in the inner cavity of the mixing tank A110 upward, avoiding the existence of a stirring blind spot, and allowing the raw materials in the mixing tank A110 to be fully and evenly mixed.

[0024] The support mechanism 200 includes a support ring 210 fixedly sleeved on the surface of the mixing tank A110, and at least three support legs 220 equidistantly distributed in a ring shape are fixedly connected to the bottom of the support ring 210. The support mechanism 200 can provide a supporting foundation for the mixing tank A110 to ensure that the main mechanism 100 can be stably placed in the desired position.

[0025] The batching mechanism 300 includes a hopper 310 located above the tank cover 120. The discharge end of the hopper 310 is connected to the tank cover 120 through the premixing mechanism 400. The feed end of the hopper 310 is threadedly connected with a stopper 311. The stopper 311 is provided with two storage members 320 for storing fertilizer raw materials. The hopper 310 can provide a support base for the storage members 320 and can also guide the raw materials discharged from the storage members 320 into the inner cavity of the premixing mechanism 400. Among them, the material storage part 320 includes a barrel 321 fixedly penetrated on the blocking cover 311, the top end of the barrel 321 is connected to a feed pipe 322, the top end of the feed pipe 322 is threadedly connected to a pipe cover 323, the bottom end of the barrel 321 is connected to a discharge pipe 324, and the discharge pipe 324 is equipped with a valve B and a solid flow meter arranged in an upper and lower manner. The raw materials of the water-retaining fertilizer type composite water-soluble fertilizer can be classified and stored through the material storage part 320, and the raw material flow in the discharge pipe 324 can be measured in real time through the solid flow meter to achieve accurate material dosage.

[0026] The premixing mechanism 400 includes a mixing tank B410 connected to the discharge end of the hopper 310, the bottom of the mixing tank B410 is connected to a guide pipe 420, a valve C is installed on the guide pipe 420, the inner cavity of the mixing tank B410 is provided with a stirring piece C430 for premixing the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer in the inner cavity of the mixing tank B410, the raw materials discharged from the hopper 310 can be collected by the mixing tank B410 for subsequent premixing, a plurality of reinforcing rods 330 equidistantly distributed in an annular shape are fixedly connected between the mixing tank B410 and the hopper 310, the reinforcing rods 330 help to improve the connection firmness between the hopper 310 and the mixing tank B410, the bottoms of the mixing tank B410 and the hopper 310 are both conical structures for material discharge; Among them, the stirring element C430 includes a rotating rod C431 horizontally arranged in the inner cavity of the mixing tank B410, one end of the rotating rod C431 is rotatably connected to the inner wall surface of the mixing tank B410 through a bearing, and the other end of the rotating rod C431 is movably penetrated to the outside of the mixing tank B410, and the surface of the rotating rod C431 is rotatably connected to the penetration point of the mixing tank B410 through a sealing bearing, which can not only improve the rotation stability of the rotating rod C431, but also avoid the phenomenon of material leakage. Two groups of symmetrically arranged stirring blades C432 are fixedly connected to the surface of the rotating rod C431, and each group of stirring blades C432 are equidistantly arranged along the length direction of the rotating rod C431. The driving mechanism 500 is located at the extended end of the rotating rod C431, and the stirring element C430 is driven to rotate by the driving mechanism 500 to realize the pre-mixing operation of the raw materials in the inner cavity of the mixing tank B410.

[0027] The driving mechanism 500 includes a mounting plate 510 fixedly connected between a plurality of hoppers 310, a motor B520 is installed at the bottom of the mounting plate 510, an output shaft of the motor B520 is vertically fixedly connected to a connecting rod 530, the bottom end of the connecting rod 530 movably penetrates into the inner cavity of the tank cover 120 and is detachably connected to the T-shaped rod 141 through a flange, the surface of the connecting rod 530 is rotatably connected to the penetration point of the tank cover 120 through a sealed bearing, which can improve the rotation stability of the connecting rod 530, the surface of the connecting rod 530 is fixedly connected to a driving bevel gear 540, the extended end of the rotating rod C431 is fixedly connected to a driven bevel gear 550 meshing with the driving bevel gear 540, the central axes of the driving bevel gear 540, the connecting rod 530 and the rotating rod A1421 are in the same straight line, and the output shaft of the motor B520 can drive the mixing component 140 and the stirring element C430 to rotate synchronously, so as to reduce the number of driving devices used, which not only reduces the use cost, but also meets the concept of energy saving and power saving.

[0028] The lifting mechanism 600 includes a cylinder A610 and a cylinder B620 symmetrically mounted on the top of the support ring 210, and the flipping mechanism 700 is arranged at the output end of the cylinder A610. A connecting piece is arranged between the output end of the cylinder B620 and the tank cover 120. When the cylinders A610 and B620 are started, the tank cover 120, the mixing component 140, the flipping mechanism 700, the driving mechanism 500, the pre-mixing mechanism 400 and the batching mechanism 300 can be synchronously moved upward for a distance, so that the mixing component 140 and the driving mechanism 500 can be disassembled first, so as to ensure that the tank cover 120 can be flipped normally later; Among them, the connecting piece includes an I-shaped block 630 fixedly connected to the output end of the cylinder B620, and a convex plate 640 is fixedly connected to the side of the surface of the tank cover 120 away from the support plate 710. A through hole 650 is opened on the convex plate 640 for the I-shaped block 630 to pass through. The thickness of the convex plate 640 is adapted to the distance between the upper plate and the lower plate of the I-shaped block 630. By aligning the I-shaped block 630 with the through hole 650, the tank cover 120 can be unlocked so that the tank cover 120 can be flipped and snapped or opened. By staggering the I-shaped block 630 and the through hole 650, the tank cover 120 can be locked so that the cylinder B620 can drive the tank cover 120 to move up and down through the connecting piece.

[0029] The flip mechanism 700 includes a support plate 710 horizontally fixedly connected to the output end of the cylinder A610, and two symmetrical support plates 720 are vertically fixedly connected to the top of the support plate 710. A support 730 is rotatably connected between the two support plates 720 through a rotating shaft. The support 730 is fixedly connected to the tank cover 120. A groove 740 is opened on the support 730. The inner cavity of the groove 740 is fixedly connected to a worm gear 750. The worm gear 750 and the central axis of the rotating shaft are in the same straight line. A motor C760 is installed on the top of the support plate 710. The output shaft of the motor C760 A worm 770 meshing with the worm gear 750 is fixedly connected, and one end of the worm 770 away from the motor C760 is rotatably connected to a support block 780 through a bearing. The bottom of the support block 780 is fixedly connected to the support plate 710. By starting the motor C760, the worm gear 750 and the support 730 can be driven to rotate around the rotating shaft, thereby driving the tank cover 120, the driving mechanism 500, the pre-mixing mechanism 400 and the dosing mechanism 300 to flip synchronously, so that the mixing component 140 can be completely removed from the inner cavity of the mixing tank A110 for subsequent maintenance and repair operations.

[0030] The top of one of the mixing tanks B410 is connected to a water pipe A800, one end of which is connected to a hose A. The hose A is connected to an external water tank through an external water pump. A valve D and a liquid flow meter A are installed on the water pipe A800. By starting the external water pump, the water in the external water tank can be transported to the inner cavity of the corresponding mixing tank B410.

[0031] Two water pipes B900 are connected to the top of the tank cover 120, and one end of the two water pipes B900 is connected to a hose B. One of the hoses B is connected to an external acid solution tank through an external water pump, and the other hose B is connected to an external alkaline solution tank through an external water pump. A valve E and a liquid flow meter B are installed on the water pipe B900. A PH sensor is installed in the inner cavity of the mixing tank A110. The PH sensor model is PH-5520. By starting the external water pump, the acidic liquid in the external acid solution tank or the alkaline liquid in the external alkaline solution tank can be transported to the inner cavity of the mixing tank A110 to adjust the pH value.

[0032] like Fig.10 As shown, the application of a mixing device provided in this embodiment in preparing a water-retaining fertilizer type composite water-soluble fertilizer specifically includes the following steps: S1. Prepare raw materials: The water-retaining fertilizer type composite water-soluble fertilizer includes a main component and an auxiliary component. The main component is made of the following raw materials in weight percentage: 40% urea, 30% monoammonium phosphate, 20% potassium sulfate, and 2% citric acid; the auxiliary component is made of the following raw materials in weight percentage: 1% sodium polyacrylate, 2% sodium humate, and 5% zinc sulfate, copper sulfate, and boric acid. The raw material preparation operation is completed; S2. Classified material storage: Rotate the pipe cover 323 to pour the raw materials into the barrel 321 through the feed pipe 322, so that the water retaining agent and the fertilizer retaining agent are respectively placed in the two barrels 321 in the hopper 310 above the water pipe A800, and the nitrogen source, phosphorus source, potassium source, organic acid and trace elements are respectively placed in other barrels 321, and the classified material storage operation can be completed; S3, raw material proportioning: open valve B, the raw material in the barrel 321 can be discharged through the discharge pipe 324, the solid flow meter detects the flow of the raw material inside the discharge pipe 324, when the amount of raw material detected by the fixed flow meter matches the preset value, close valve B, so that the amount of raw material is accurately controlled, the raw material is introduced into the inner cavity of the mixing tank B410 through the hopper 310 for temporary storage, and the raw material proportioning operation can be completed; S4, premixing: start the motor B520, the output shaft of the motor B520 drives the connecting rod 530 and the active bevel gear 540 to rotate, the active bevel gear 540 drives the driven bevel gear 550 to rotate, the driven bevel gear 550 drives the rotating rod C431 and the stirring blade C432 to rotate, so as to stir the raw materials in the inner cavity of the mixing tank B410 to obtain a mixture A; at the same time, by starting the external water pump, the water in the external water tank is transported to the inner cavity of the corresponding mixing tank B410 through the hose A and the water pipe A800, the liquid flow meter A detects the flow of water in the water pipe A800, when the liquid flow meter A detects that the water consumption matches the preset value, the valve D is closed, so that the water consumption is accurately controlled, and the stirring blade C432 continues to rotate so that the water retaining agent and the fertilizer retaining agent are respectively dissolved in the water to obtain a mixture B, and the raw material premixing operation is completed; S4, stirring and mixing: open valve C, so that mixture A and mixture B in mixing tank B410 fall into the inner cavity of mixing tank A110 respectively, and connecting rod 530 also drives T-shaped rod 141 to rotate, and T-shaped rod 141 drives rotating rod A1421, stirring blade 1422, protective shell 1431, motor A1432, rotating rod B1433, spiral blade 1434 and scraper 144 to rotate synchronously, so that stirring blade 1422 stirs and mixes mixture A and mixture B in the middle of the inner cavity of mixing tank A110, and spiral blade 1434 rotates around the central axis of mixing tank A110. The axis rotates to form a revolution, and then the mixture A and the mixture B around the inner cavity of the mixing tank A110 can be stirred and mixed. At the same time, the motor A1432 is started, and the output shaft of the motor A1432 drives the rotating rod B1433 and the spiral blade 1434 to rotate, so that the spiral blade 1434 rotates around the central axis of the rotating rod B1433 to form a self-rotation, so that the raw materials in the inner cavity of the mixing tank A110 can be lifted upward, avoiding the existence of a stirring blind area, so that the mixture A and the mixture B in the mixing tank A110 can be fully mixed and evenly, and the raw material stirring and mixing operation can be completed; S5. Adjusting pH value: starting the external water pump, transferring the acidic liquid in the external acidic solution tank or the alkaline liquid in the external alkaline solution tank to the inner cavity of the mixing tank A110 through the hose B and the water pipe B900, and the liquid flow meter B detecting the flow of the acidic liquid or the alkaline liquid in the water pipe B900. When the liquid flow meter B detects that the acidic liquid or the alkaline liquid matches the preset value, the valve E is closed, so that the amount of the acidic liquid or the alkaline liquid is accurately controlled, and the stirring blade 1422 and the spiral blade 1434 continue to rotate and stir until the pH detected by the pH sensor reaches 6.0-7.0, and the pH value adjustment operation is completed; opening the valve A, the material in the mixing tank A110 can be discharged through the tank cover 120 for subsequent drying (drying to a water content of less than 5%), crushing and screening processes, and finally a water-retaining fertilizer type composite water-soluble fertilizer can be obtained; S6. Maintenance and overhaul: Start the cylinder A610 and the cylinder B620. The output end of the cylinder A610 drives the flip mechanism 700 to move upward. The output end of the cylinder B620 drives the connecting piece to move upward. The flip mechanism 700 and the connecting piece jointly drive the tank cover 120 to move upward. The tank cover 120 drives the mixing assembly 140, the flip mechanism 700, the driving mechanism 500, the pre-mixing mechanism 400 and the batching mechanism 300 to move upward for a distance synchronously, so that the connection between the T-bar 141 and the connecting rod 530 is exposed. At this time, the mixing assembly 140 and the driving mechanism 500 can be disassembled first, and the disassembled mixing assembly 140 can be temporarily placed in the mixing tank A11. 0, rotate the I-shaped block 630 so that the I-shaped block 630 is aligned with the through hole 650, and the through hole 650 can be unlocked, and then the motor C760 is started, and the output shaft of the motor C760 drives the worm 770 to rotate, the worm 770 drives the worm wheel 750 to rotate, and the worm wheel 750 drives the support 730 to rotate with the rotating shaft as the center of the circle, and the support 730 drives the tank cover 120, the driving mechanism 500, the pre-mixing mechanism 400 and the batching mechanism 300 to rotate synchronously to realize the flipping and opening operation of the tank cover 120. At this time, the mixing component 140 can be completely taken out from the inner cavity of the mixing tank A110 for maintenance and repair operations; on the contrary, the above steps can be reversed to complete the reset operation.

[0033] Through the above specific implementations, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A mixing device, characterized in that: The invention comprises a main body mechanism (100) on which a support mechanism (200) is arranged, a batching mechanism (300) and a pre-mixing mechanism (400) are arranged on the top of the main body mechanism (100), a plurality of the batching mechanisms (300) and the pre-mixing mechanisms (400) are respectively arranged in a ring-shaped manner and are equidistantly distributed, a driving mechanism (500) is arranged at the center of the top of the main body mechanism (100), a lifting mechanism (600) is arranged on the support mechanism (200), and a flipping mechanism (700) is arranged on the lifting mechanism (600), wherein: The main body mechanism (100) is used to stir and mix the raw materials of the water-retaining fertilizer type composite water-soluble fertilizer; The support mechanism (200) is used to support the main mechanism (100) and the lifting mechanism (600); The batching mechanism (300) is used to store raw materials of water-retaining fertilizer type composite water-soluble fertilizer; The premixing mechanism (400) is used to premix raw materials for storing water-retaining fertilizer type composite water-soluble fertilizer; The driving mechanism (500) is used to drive the main body mechanism (100) and the premixing mechanism (400) to rotate; The lifting mechanism (600) is used to drive the main mechanism (100) to perform lifting operations; The turning mechanism (700) is used to drive the main body mechanism (100), the batching mechanism (300), the premixing mechanism (400) and the driving mechanism (500) to perform a turning operation; The main body mechanism (100) comprises a mixing tank A (110) having a conical structure, the top of the mixing tank A (110) being buckled with a tank cover (120), the bottom of the mixing tank A (110) being connected with a discharge pipe (130), the discharge pipe (130) being installed with a valve A, and the inner cavity of the mixing tank A (110) being provided with a mixing assembly (140); The mixing assembly (140) comprises a T-shaped rod (141) disposed above the inner cavity of a mixing tank A (110); a stirring member A (142) capable of stirring and mixing raw materials in the middle of the inner cavity of the mixing tank A (110) is disposed at the center of the bottom of the T-shaped rod (141); stirring members B (143) capable of stirring and mixing raw materials around the inner cavity of the mixing tank A (110) are disposed at both ends of the T-shaped rod (141); the length of one of the stirring members B (143) is greater than the length of the other stirring member B (143); a scraper (144) is disposed on a side of the stirring member B (143) close to the inner wall surface of the mixing tank A (110); one side of the scraper (144) is in contact with the inner wall surface of the mixing tank A (110); and the driving mechanism (500) is located above the T-shaped rod (141); The batching mechanism (300) comprises a hopper (310) located above the tank cover (120); the discharge end of the hopper (310) is in communication with the tank cover (120) via a premixing mechanism (400); the feed end of the hopper (310) is threadedly connected to a stopper (311); and the stopper (311) is provided with two storage members (320) for storing fertilizer raw materials; The material storage member (320) comprises a material barrel (321) fixedly penetrating the blocking cover (311); the top end of the material barrel (321) is connected to a material feed pipe (322); the top end of the material feed pipe (322) is threadedly connected to a pipe cover (323); the bottom end of the material barrel (321) is connected to a material discharge pipe (324); and the material discharge pipe (324) is provided with a valve B and a solid flow meter arranged in an upper and lower manner; The premixing mechanism (400) comprises a mixing tank B (410) connected to the discharge end of the hopper (310); the bottom of the mixing tank B (410) is connected to a material guide pipe (420); a valve C is installed on the material guide pipe (420); the inner cavity of the mixing tank B (410) is provided with a stirring element C (430) for premixing raw materials of the water-retaining fertilizer type composite water-soluble fertilizer in the inner cavity of the mixing tank B (410); The stirring member C (430) comprises a rotating rod C (431) horizontally arranged in the inner cavity of the mixing tank B (410), one end of the rotating rod C (431) being rotatably connected to the inner wall surface of the mixing tank B (410) via a bearing, and the other end of the rotating rod C (431) being movably extended through the outer side of the mixing tank B (410), two groups of symmetrically arranged stirring blades C (432) being fixedly connected to the surface of the rotating rod C (431), each group of the stirring blades C (432) being equidistantly arranged along the length direction of the rotating rod C (431), and the driving mechanism (500) being located at the extended end of the rotating rod C (431).

2. The mixing device according to claim 1, characterized in that: The lifting mechanism (600) comprises a cylinder A (610) and a cylinder B (620) symmetrically mounted on the top of the support ring (210); the flipping mechanism (700) is arranged at the output end of the cylinder A (610); and a connecting piece is arranged between the output end of the cylinder B (620) and the tank cover (120); The tilting mechanism (700) comprises a support plate (710) fixedly connected to the output end of the cylinder A (610); two symmetrical support plates (720) are fixedly connected to the top of the support plate (710); a support (730) is rotatably connected between the two support plates (720); the support (730) is fixedly connected to the tank cover (120); a groove (740) is provided on the support (730); a worm gear (750) is fixedly connected to the inner cavity of the groove (740); a motor C (760) is installed on the top of the support plate (710); a worm (770) meshing with the worm gear (750) is fixedly connected to the output shaft of the motor C (760); a support block (780) is rotatably connected to one end of the worm gear (770) away from the motor C (760); and the bottom of the support block (780) is fixedly connected to the support plate (710).

3. The mixing device according to claim 2, characterized in that: The stirring member A (142) comprises a rotating rod A (1421) fixedly connected to the center of the bottom of the T-shaped rod (141), and a plurality of groups of stirring blades (1422) arranged in layers up and down are fixedly connected to the surface of the rotating rod A (1421), and each group of stirring blades (1422) has four stirring blades (1422) distributed in an annular shape and at equal intervals.

4. The mixing device according to claim 3, characterized in that: The stirring member B (143) comprises a protective shell (1431) which is detachably connected to the end of the T-shaped rod (141) and is located on the side of the rotating rod A (1421); a motor A (1432) is installed in the inner cavity of the protective shell (1431); the output shaft of the motor A (1432) is fixedly connected to the rotating rod B (1433); the bottom end of the rotating rod B (1433) passes through the inner cavity of the mixing tank A (110); a spiral blade (1434) is fixedly connected to the surface of the rotating rod B (1433); and the scraper (144) is detachably connected to the surface of the protective shell (1431).

5. The mixing device according to claim 4, characterized in that: The support mechanism (200) comprises a support ring (210) fixedly sleeved on the surface of the mixing tank A (110), and at least three supporting legs (220) equidistantly distributed in a ring shape are fixedly connected to the bottom of the support ring (210).

6. The mixing device according to claim 5, characterized in that: The driving mechanism (500) comprises a mounting plate (510) fixedly connected between a plurality of hoppers (310); a motor B (520) is mounted at the bottom of the mounting plate (510); an output shaft of the motor B (520) is vertically fixedly connected to a connecting rod (530); the bottom end of the connecting rod (530) movably penetrates the inner cavity of the tank cover (120) and is detachably connected to a T-shaped rod (141); a driving bevel gear (540) is fixedly connected to the surface of the connecting rod (530); and a driven bevel gear (550) meshing with the driving bevel gear (540) is fixedly connected to the extended end of the rotating rod C (431).

7. The mixing device according to claim 6, characterized in that: The connecting member comprises an I-shaped block (630) fixedly connected to the output end of the cylinder B (620); a convex plate (640) is fixedly connected to a side of the surface of the tank cover (120) away from the support plate (710); a through hole (650) is provided on the convex plate (640) for the I-shaped block (630) to pass through; and a thickness of the convex plate (640) is adapted to a distance between an upper plate and a lower plate of the I-shaped block (630).

8. The mixing device according to claim 7, characterized in that: The top of one of the mixing tanks B (410) is connected to a water pipe A (800), one end of the water pipe A (800) is connected to a hose A, the hose A is connected to an external water tank via an external water pump, and a valve D and a liquid flow meter A are installed on the water pipe A (800).

9. The mixing device according to claim 8, characterized in that: The top of the tank cover (120) is connected to two water pipes B (900), one end of each of the two water pipes B (900) is connected to a hose B, one of the hoses B is connected to an external acid solution tank via an external water pump, and the other hose B is connected to an external alkaline solution tank via an external water pump, a valve E and a liquid flow meter B are installed on the water pipes B (900), and a pH sensor is installed in the inner cavity of the mixing tank A (110).

10. Use of a mixing device as claimed in claim 9 in preparing a water-retaining fertilizer type composite water-soluble fertilizer, characterized in that: The specific steps include: S1. Prepare raw materials: The water-retaining fertilizer type composite water-soluble fertilizer includes main components and auxiliary components. The main components are made of the following raw materials in weight percentage: nitrogen source 10%-40%, phosphorus source 5%-35%, potassium source 10%-35%, organic acid 1%-5%; the auxiliary components are made of the following raw materials in weight percentage: water retaining agent 0.5%-2%, fertilizer retaining agent 0.5%-5%, trace elements 0.1%-2%, wherein the water retaining agent is sodium polyacrylate or polyacrylamide, and the fertilizer retaining agent is sodium humate or potassium humate, and the raw material preparation operation is completed; S2. Classified material storage: The pipe cover (323) is rotated to pour the raw materials into the barrel (321) through the feed pipe (322), so that the water retaining agent and the fertilizer retaining agent are respectively placed in two barrels (321) in the hopper (310) above the water pipe A (800), and the nitrogen source, phosphorus source, potassium source, organic acid and trace elements are respectively placed in other barrels (321), thereby completing the classified material storage operation; S3, raw material proportioning: open valve B to discharge the raw material in the barrel (321) through the discharge pipe (324), and the solid flow meter detects the flow rate of the raw material in the discharge pipe (324). When the amount of raw material detected by the fixed flow meter matches the preset value, close valve B so that the amount of raw material is accurately controlled, and the raw material is introduced into the inner cavity of the mixing tank B (410) through the hopper (310) for temporary storage, thereby completing the raw material proportioning operation; S4, premixing: start the motor B (520), the output shaft of the motor B (520) drives the connecting rod (530) and the driving bevel gear (540) to rotate, the driving bevel gear (540) drives the driven bevel gear (550) to rotate, the driven bevel gear (550) drives the rotating rod C (431) and the stirring blade C (432) to rotate, so that the raw materials in the inner cavity of the mixing tank B (410) can be stirred to obtain a mixture A; at the same time, by starting the external water pump, the water in the external water tank is transported to the inner cavity of the corresponding mixing tank B (410) through the hose A and the water pipe A (800), the liquid flow meter A detects the flow of water in the water pipe A (800), when the liquid flow meter A detects that the water consumption matches the preset value, the valve D is closed, so that the water consumption is accurately controlled, and the stirring blade C (432) continues to rotate so that the water retaining agent and the fertilizer retaining agent are respectively dissolved in the water to obtain a mixture B, and the raw material premixing operation is completed; S4. Stirring and mixing: Open valve C, so that mixture A and mixture B in mixing tank B (410) fall into the inner cavity of mixing tank A (110) respectively, and the connecting rod (530) drives the T-shaped rod (141) to rotate, and the T-shaped rod (141) drives the rotating rod A (1421), the stirring blade (1422), the protective shell (1431), the motor A (1432), the rotating rod B (1433), the spiral blade (1434) and the scraper (144) to rotate synchronously, so that the stirring blade (1422) stirs and mixes the mixture A and the mixture B in the middle of the inner cavity of mixing tank A (110), and the spiral blade (1434) rotates around the mixing tank A (110). 10) The central axis rotates around the axis to form a revolution, thereby being able to stir and mix the mixture A and the mixture B around the inner cavity of the mixing tank A (110), and at the same time starting the motor A (1432), the output shaft of the motor A (1432) drives the rotating rod B (1433) and the spiral blade (1434) to rotate, so that the spiral blade (1434) rotates around the central axis of the rotating rod B (1433) to form a self-rotation, thereby being able to lift the raw materials in the inner cavity of the mixing tank A (110), avoiding the existence of a stirring blind area, so that the mixture A and the mixture B in the mixing tank A (110) can be fully mixed and evenly mixed, and the raw material stirring and mixing operation is completed; S5. Adjusting pH value: starting the external water pump to transport the acidic liquid in the external acidic solution tank or the alkaline liquid in the external alkaline solution tank to the inner cavity of the mixing tank A (110) through the hose B and the water pipe B (900); the liquid flow meter B detects the flow rate of the acidic liquid or the alkaline liquid in the water pipe B (900); when the liquid flow meter B detects that the acidic liquid or the alkaline liquid matches the preset value, the valve E is closed so that the amount of the acidic liquid or the alkaline liquid is accurately controlled; the stirring blade (1422) and the spiral blade (1434) continue to rotate and stir until the pH detected by the pH sensor reaches the specified pH value, and the pH adjustment operation is completed; opening the valve A, the material in the mixing tank A (110) can be discharged through the tank cover (120) for subsequent drying, crushing and screening processes, and finally a water-retaining fertilizer type composite water-soluble fertilizer can be obtained; S6. Maintenance and overhaul: Start the cylinder A (610) and the cylinder B (620). The output end of the cylinder A (610) drives the flip mechanism (700) to move upward. The output end of the cylinder B (620) drives the connecting piece to move upward. The flip mechanism (700) and the connecting piece jointly drive the tank cover (120) to move upward. The tank cover (120) drives the mixing assembly (140), the flip mechanism (700), the driving mechanism (500), the pre-mixing mechanism (400) and the batching mechanism (300) to move upward for a certain distance simultaneously, so that the connection between the T-shaped rod (141) and the connecting rod (530) is exposed. At this time, the mixing assembly (140) and the driving mechanism (500) can be disassembled first, and the disassembled mixing assembly (140) can be temporarily placed in the mixing tank A (110). ), rotate the I-shaped block (630) so that the I-shaped block (630) is aligned with the through hole (650), thereby unlocking the through hole (650), and then start the motor C (760). The output shaft of the motor C (760) drives the worm (770) to rotate, the worm (770) drives the worm wheel (750) to rotate, the worm wheel (750) drives the support (730) to rotate with the rotation axis as the center, and the support (730) drives the tank cover (120), the driving mechanism (500), the pre-mixing mechanism (400) and the batching mechanism (300) to rotate synchronously to achieve the flipping and opening operation of the tank cover (120). At this time, the mixing component (140) can be completely taken out of the inner cavity of the mixing tank A (110) for maintenance and repair operations; conversely, the above steps can be reversed to complete the reset operation.

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