Compound water-soluble fertilizer crushing and screening machine

Abstract

The utility model discloses a kind of composite water-soluble fertilizer crushing screening machines, it includes bin, bin is internally provided with crushing mechanism and the screening mechanism located below crushing mechanism, crushing mechanism includes mechanism support and the crushing roller I, crushing roller II that parallelly lays on it, screening mechanism includes screening bin and the steel brush roller I, steel brush roller II that horizontally parallelly lays in its inside, the top of bin is provided with feed channel, the bottom of bin is provided with discharge channel, feed channel is located above crushing mechanism, discharge channel is located below screening mechanism. The utility model structure design is reasonable, through the structure optimization and synergic cooperation of each component, the comprehensive effect of crushing efficiency promotion, screen anti-blocking, power energy saving and operation stability is realized.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment, and in particular to a composite water-soluble fertilizer crushing and screening machine. Background Technology

[0002] Compound water-soluble fertilizers are widely used in modern agricultural production due to their advantages such as high nutrient content, rapid dissolution, and high absorption and utilization rate. However, during production, storage, and transportation, water-soluble fertilizers are prone to clumping due to factors such as humidity and pressure. Clumped fertilizers not only make them difficult to apply evenly but also clog the nozzles or pipelines of fertilization equipment, seriously affecting fertilization efficiency and effectiveness. Therefore, crushing and screening equipment has become an indispensable key piece of equipment in the production and use of compound water-soluble fertilizers.

[0003] Currently, water-soluble fertilizer crushing and screening equipment on the market generally suffers from the following problems: First, the crushing mechanism mostly adopts a single smooth roller structure, relying solely on extrusion pressure to achieve crushing. This has limited effect on crushing stubborn lumps with high hardness, resulting in low crushing efficiency and uneven particle size after crushing. Second, the screens in the screening mechanism are mostly fixed structures, lacking effective anti-clogging designs. Due to the viscosity of water-soluble fertilizers, they are easily stuck in the screen holes during screening, leading to screen blockage, a continuous decline in screening efficiency, and the need for frequent shutdowns for cleaning, affecting production continuity. Third, some equipment uses independent power drives for the crushing and screening mechanisms, which not only increases the manufacturing cost and energy consumption of the equipment but also makes it difficult to coordinate the operation rhythm of the two mechanisms, further reducing the overall processing efficiency. Fourth, the internal structure design of the equipment is unreasonable, and the crushed fertilizer is prone to accumulate inside the silo, causing material waste and potentially leading to equipment jamming and other malfunctions. Utility Model Content

[0004] In view of this, the present invention provides a composite water-soluble fertilizer crushing and screening machine, which has high crushing efficiency, good screen anti-clogging effect, simple power system and reasonable structural design, meeting the needs of modern agriculture for high efficiency and stability of water-soluble fertilizer processing equipment.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A composite water-soluble fertilizer crushing and screening machine includes a bin body. Inside the bin body is a crushing mechanism and a screening mechanism located below the crushing mechanism. The crushing mechanism includes a support frame and crushing rollers I and II arranged side-by-side. One end of crushing roller I passes through the support frame and is sequentially connected to a main crushing gear, a drive sprocket, and a reducer. One end of crushing roller II passes through the support frame and is connected to a driven crushing gear meshing with the main crushing gear. The reducer is connected to a power motor. The screening mechanism includes a screening bin and two steel brush rollers I and II arranged horizontally side-by-side inside it. The front end is equipped with an openable and closable gate, which is fastened and closed by a fixing buckle. The surface of the screening chamber is covered with a screen. One end of the steel brush roller I passes through the screening chamber and is connected in sequence to the main screening gear and the driven sprocket that meshes with the driving sprocket. One end of the steel brush roller II passes through the screening chamber and is connected to the driven screening gear that meshes with the main screening gear. Several steel wire bundles are spirally and evenly laid on the surface of the steel brush roller I and steel brush roller II. The steel wire bundles are in close contact with the surface of the screen. The top of the chamber is equipped with a feeding channel and the bottom of the chamber is equipped with a discharging channel. The feeding channel is located above the crushing mechanism and the discharging channel is located below the screening mechanism.

[0006] As an improvement to the above technical solution, the silo body is made of stainless steel, and the interior of the silo body is hollow to form a fertilizer processing chamber, and the crushing mechanism and the screening mechanism are arranged vertically and vertically along the central axis of the silo body.

[0007] As an improvement to the above technical solution, the mechanism support is a "well" shaped structure, with its front and rear ends fixedly connected to the inner side of the bin body by bolts, and horizontally mounted in the upper part of the bin body; the crushing roller I and crushing roller II are horizontally mounted side by side on the top of the mechanism support, with the axes of crushing roller I and crushing roller II on the same horizontal plane, and the surfaces of crushing roller I and crushing roller II are evenly distributed with protruding ridges, which are arranged in a spiral shape.

[0008] Preferably, the distance between the crushing roller I and the crushing roller II is in the range of 5-10 mm.

[0009] Preferably, the height of the protruding ridge is in the range of 2-3 mm.

[0010] As an improvement to the above technical solution, the left end of the crushing roller I penetrates the left side wall of the mechanism support and is sequentially fixedly connected to the main crushing gear and the drive sprocket via a flat key. The side of the drive sprocket away from the main crushing gear is connected to the output end of the reducer via coupling I. The input end of the reducer is fixedly connected to the output shaft of the power motor via coupling II. The power motor is a three-phase asynchronous motor, which is fixed to the outside of the chamber via a motor bracket. The left end of the crushing roller II also penetrates the left side wall of the mechanism support and is fixedly connected to the driven crushing gear via a flat key. The driven crushing gear and the main crushing gear are in a horizontal meshing state.

[0011] As an improvement to the above technical solution, the top of the screening chamber is fixed to the bottom of the mechanism support by welding, forming a connected space with the crushing mechanism. The bottom of the screening chamber has an opening, and an arc-shaped door is matched at the opening. One side of the door is hinged to the screening chamber by a hinge, and the other side of the door is fastened to the screening chamber by two symmetrically arranged fixing buckles. The fixing buckles adopt a press-type buckle structure.

[0012] As an improvement to the above technical solution, both the screening chamber and the hood are equipped with screens, and the steel brush roller I and steel brush roller II are arranged horizontally side by side inside the screening chamber. The axis between steel brush roller I and steel brush roller II is parallel to the axis between crushing and rolling roller I and crushing and rolling roller II.

[0013] Preferably, the mesh size of the sieve is in the range of 3-5 mm.

[0014] As an improvement to the above technical solution, the left end of the steel brush roller I penetrates the left side of the screening chamber and is sequentially fixedly connected to the screening main gear and the driven sprocket via a flat key. The driven sprocket is connected to the driving sprocket of the crushing mechanism via chain drive. The left end of the steel brush roller II penetrates the left side of the screening chamber and is fixedly connected to the screening driven gear via a flat key. The screening driven gear and the screening main gear are in a horizontal meshing state. The surfaces of both steel brush roller I and steel brush roller II are uniformly fixed with several steel wire clusters in a spiral winding manner. The length of the steel wire clusters is set so that the free end of the steel wire cluster is in close contact with the upper surface of the screen.

[0015] As an improvement to the above technical solution, the top of the silo body is integrally formed with a feeding channel, which has a funnel-shaped structure. The bottom opening of the feeding channel is directly opposite the middle area between crushing roller I and crushing roller II. The bottom of the silo body is integrally formed with a discharge channel, which has a sloping structure. The top feeding end of the discharge channel is located at the bottom of the screening silo.

[0016] Compared with the prior art, the technical solution of this utility model has the following advantages: This utility model features a reasonable structural design. Through the optimization and coordinated operation of various components, it achieves a comprehensive effect of improved crushing efficiency, screen clogging prevention, energy saving, and stable operation. The horizontal parallel arrangement of crushing roller I and crushing roller II with their coplanar axes, combined with adjustable spacing, adapts to fertilizers with different degrees of agglomeration, ensuring targeted crushing. The close contact design between steel brush roller I and steel brush roller II and the screen, combined with their counter-rotation, allows the steel wire clusters to continuously brush the screen surface, promptly removing stuck fertilizer particles and fundamentally solving the screen clogging problem. At the same time, the secondary dispersing effect of steel brush roller I and steel brush roller II on large particles further improves the utilization rate of materials. Other beneficial effects of this invention will be further explained in the following specific embodiments. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a schematic diagram A of the internal structure of the present invention; Figure 2 This is a schematic diagram (B) of the internal structure of the present invention; Figure 3 This is a layout diagram of the crushing and screening mechanisms of this utility model; Figure 4 This is a top view of the crushing mechanism of this utility model. Figure 5 This is a top view schematic diagram of the screening mechanism of this utility model; The components are as follows: 1. Bin body; 2. Crushing mechanism; 201. Mechanism support; 202. Crushing roller I; 203. Crushing roller II; 204. Crushing main gear; 205. Drive sprocket; 206. Reducer; 207. Crushing driven gear; 208. Power motor; 3. Screening mechanism; 301. Screening bin; 302. Steel brush roller I; 303. Steel brush roller II; 304. Door; 305. Screening main gear; 306. Driven sprocket; 307. Screening driven gear; 4. Feed channel; 5. Discharge channel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "above", "below", "front", "back", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "setting," "installing," "connecting," "linking," "fixing," and "communicating" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figures 1 to 5 As shown, this utility model provides a composite water-soluble fertilizer crushing and screening machine. It includes a bin 1, inside which a crushing mechanism 2 and a screening mechanism 3 located below the crushing mechanism 2 are arranged. The crushing mechanism 2 includes a mechanism support 201 and crushing rollers I 202 and II 203 arranged side by side on it. One end of the crushing roller I 202 passes through the mechanism support 201 and is connected in sequence to a crushing main gear 204, a drive sprocket 205, and a reducer 206. One end of the crushing roller II 203 passes through the mechanism support 201 and is connected to a crushing driven gear 207 that meshes with the crushing main gear 204. The reducer 206 is connected to a power motor 208. The screening mechanism 3 includes a screening bin 301 and steel brush rollers I 302 and II 303 arranged horizontally side by side inside it. The front of the screening bin 301... The end is provided with a closable door 304, which is fastened and closed by a fixing buckle. The surface of the screening chamber 301 is covered with a screen. One end of the steel brush roller I 302 passes through the screening chamber 301 and is connected in sequence to the screening main gear 305 and the driven sprocket 306 that cooperates with the driving sprocket 205. One end of the steel brush roller II 303 passes through the screening chamber 301 and is connected to the screening driven gear 307 that meshes with the screening main gear 305. The surfaces of the steel brush roller I 302 and the steel brush roller II 303 are spirally and evenly covered with several steel wire bundles, which are in close contact with the surface of the screen. The top of the chamber 1 is provided with a feeding channel 4, and the bottom of the chamber 1 is provided with a discharging channel 5. The feeding channel 4 is located above the crushing mechanism 2, and the discharging channel 5 is located below the screening mechanism 3.

[0022] In the embodiments described in this utility model, the silo body 1 is made of stainless steel, which not only ensures structural stability and facilitates the installation and maintenance of internal mechanisms, but also has excellent corrosion resistance, resisting the erosion of substances such as salt in water-soluble fertilizers, extending the overall service life of the equipment, and reducing later maintenance costs. The hollow interior of the silo body 1 forms a fertilizer processing chamber, and the crushing mechanism 2 and the screening mechanism 3 are arranged vertically and vertically along the central axis of the silo body 1, ensuring that the fertilizer processed by the crushing mechanism 2 can fall directly into the screening mechanism 3, avoiding the accumulation of fertilizer inside the silo body 1, shortening the fertilizer processing path, reducing energy loss, and improving processing efficiency.

[0023] In the embodiments described in this utility model, the mechanism support 201 has a "well" shaped structure. Its front and rear ends are fixedly connected to the inner side of the bin body 1 by bolts and are horizontally mounted in the upper part of the bin body 1, providing stable support for the crushing roller I 202 and crushing roller II 203. The crushing roller I 202 and crushing roller II 203 are horizontally mounted side by side on the top of the mechanism support 201. The axes of the crushing roller I 202 and crushing roller II 203 are on the same horizontal plane. The distance between the crushing roller I 202 and crushing roller II 203 can be finely adjusted according to the size of the water-soluble fertilizer agglomerates, ensuring that fertilizers with different agglomeration degrees can be effectively crushed. Different production needs can be met without replacing the rollers. The surfaces of the crushing roller I 202 and crushing roller II 203 are evenly distributed with raised ridges arranged in a spiral shape. The setting of the raised ridges can enhance the shearing force on stubborn agglomerates and improve the crushing effect.

[0024] Preferably, the distance between the crushing roller I 202 and the crushing roller II 203 is in the range of 5-10 mm.

[0025] Preferably, the height of the protruding ridge is in the range of 2-3 mm.

[0026] In the embodiment of this utility model, the left end of the crushing and rolling roller I 202 penetrates the left side wall of the mechanism bracket 201, and is sequentially and fixedly connected to the crushing main gear 204 and the drive sprocket 205 via a flat key. The side of the drive sprocket 205 away from the crushing main gear 204 is connected to the output end of the reducer 206 via coupling I. The input end of the reducer 206 is fixedly connected to the output shaft of the power motor 208 via coupling II. The power motor 208 is a three-phase asynchronous motor, which is fixed to the outside of the bin 1 via a motor bracket. The crushing roller II 203 is located away from the fertilizer processing chamber to avoid fertilizer dust contaminating the power motor 208 and improve the operational reliability of the power motor 208. The left end of the crushing roller II 203 also penetrates the left side wall of the mechanism support 201 and is fixedly connected to the crushing driven gear 207 by a flat key. The crushing driven gear 207 and the crushing main gear 204 are in a horizontal meshing state with a meshing gap of 0.1-0.3mm. This not only ensures smooth power transmission but also reduces gear meshing impact, reduces wear, extends the service life of transmission components, and reduces the frequency of equipment failures.

[0027] In the embodiment of this utility model, the top of the screening chamber 301 is fixed to the bottom of the mechanism support 201 by welding, forming a vertically connected space with the crushing mechanism 2. The bottom of the screening chamber 301 has an opening, and an arc-shaped cover 304 is matched and installed at the opening. One side of the cover 304 is hinged to the screening chamber 301 by a hinge, and the other side of the cover 304 is fastened and closed to the screening chamber 301 by two symmetrically arranged fixing buckles. The fixing buckles adopt a press-type buckle structure, which facilitates quick opening and closing of the cover 304 for maintenance. The fixing buckle structure is easy to operate and can complete the fixing and opening of the cover 304 without tools. The arc-shaped cover 304 fits tightly with the screening chamber, which can prevent fertilizer particles from splashing during the screening process.

[0028] In the embodiments described in this utility model, both the screening chamber 301 and the gate 304 are equipped with screens to form a fully enclosed screening space, ensuring that all crushed fertilizers are screened, thereby improving the finished product qualification rate. The mesh size of the screen is set according to the finished particle size requirements of water-soluble fertilizers, ensuring that all crushed fertilizers can be screened. The steel brush rollers I 302 and II 303 are arranged horizontally side by side inside the screening chamber 301, and the axis between the steel brush rollers I 302 and II 303 is parallel to the axis between the crushing and rolling rollers I 202 and II 203.

[0029] Preferably, the mesh size of the screen is in the range of 3-5mm, which is suitable for the field application needs of water-soluble fertilizers and avoids clogging of fertilizer application equipment by excessively large particles.

[0030] In the embodiment of this utility model, the left end of the steel brush roller I 302 penetrates the left side of the screening chamber 301 and is sequentially fixedly connected to the screening main gear 305 and the driven sprocket 306 via a flat key. The driven sprocket 306 is connected to the driving sprocket 205 of the crushing mechanism 2 via chain drive. The left end of the steel brush roller II 303 penetrates the left side of the screening chamber 301 and is fixedly connected to the screening driven gear 307 via a flat key. The screening driven gear 307 and the screening main gear 305 are in a horizontal meshing state, ensuring that the steel brush roller I 302 and the steel brush roller II 303 rotate in opposite directions. The surfaces of both the steel brush roller I 302 and the steel brush roller II 303 are uniformly fixed with several steel wire bundles in a spiral winding manner. The length is set so that the free end of the steel wire bundle is in close contact with the surface of the screen. When the power motor 208 drives the drive sprocket 205 and then drives the steel brush roller I 302 and steel brush roller II 303 to rotate through the driven sprocket 306, the steel brush roller I 302 and steel brush roller II 303 can brush the screen to prevent clogging and break up large particles. The spirally arranged steel wire bundle can drive the fertilizer to move along the axis of the roller body when rotating, avoiding local accumulation of fertilizer in the screening chamber 301, making the screening more uniform. The steel wire bundle is in close contact with the screen and rotates in opposite directions to form a bidirectional brushing effect, which can more thoroughly remove fertilizer particles stuck in the screen holes. At the same time, the steel wire bundle is made of high elastic stainless steel wire, which is not easy to deform and ensures long-term anti-clogging effect.

[0031] In the embodiments described in this utility model, the top of the silo 1 is integrally formed with a feeding channel 4, which has a funnel-shaped structure to achieve centralized feeding of fertilizer. The bottom opening of the feeding channel 4 is directly opposite the middle area between the crushing roller I 202 and the crushing roller II 203, ensuring that the fertilizer can fall accurately between the crushing roller I 202 and the crushing roller II 203, reducing ineffective crushing and improving crushing efficiency. The bottom of the silo 1 is integrally formed with a discharge channel 5, which has a sloping structure to accelerate the falling of fertilizer by gravity and avoid accumulation. The top feeding end of the discharge channel 5 is located at the bottom of the screening silo 301, which facilitates the falling of qualified fertilizer after screening. The inner walls of the feeding channel 4 and the discharge channel 5 are polished to reduce the adhesion of fertilizer on the surface of the channel, and at the same time facilitate cleaning and avoid cross-contamination between different batches of fertilizer.

[0032] Based on the above, the working principle of this utility model is as follows: Start-up phase: The power supply to the power motor 208 is turned on. The power output from the power motor 208 is reduced by the reducer 206 and then transmitted to the connection end between the crushing roller I 202 and the reducer 206, driving the crushing roller I 202, the main crushing gear 204, and the drive sprocket 205 to rotate synchronously. The main crushing gear 204, through meshing with the driven crushing gear 207, drives the crushing roller II 203 to rotate in the opposite direction, completing the power drive of the crushing mechanism 2. At the same time, the drive sprocket 205 drives the driven sprocket 306 to rotate through the chain, thereby driving the steel brush roller I 302 and the screening main gear 305 to rotate synchronously. The screening main gear 305, through meshing with the screening driven gear 307, drives the steel brush roller II 303 to rotate in the opposite direction, realizing the synchronous power drive of the screening mechanism 3. Crushing stage: The agglomerated compound water-soluble fertilizer is fed into the bin 1 through the feed channel 4. Under the action of gravity, the fertilizer falls between the rotating crushing roller I 202 and crushing roller II 203. The two rollers crush the large agglomerated fertilizer through the squeezing and shearing forces generated by their relative rotation. The crushed fertilizer falls into the screening bin 301 of the screening mechanism 3 under the action of gravity. Screening and anti-clogging stage: Fertilizer falling into screening bin 301, qualified particles with a particle size smaller than the mesh openings of the screen pass directly through the screen and are collected through discharge channel 5; particles with a particle size larger than the mesh openings remain on the screen and are further dispersed under the relative rotation of steel brush roller I 302 and steel brush roller II 303. At the same time, the steel wire clusters on the surface of the steel brush rollers continuously contact and rub against the surface of the screen, brushing out the fertilizer particles stuck in the mesh openings of the screen, ensuring that the screen openings are always unobstructed, and avoiding a decrease in screening efficiency or clogging. Maintenance phase: After the equipment has been running for a period of time, the power motor 208 can be turned off, the fixing buckle can be loosened and the cover door 304 can be opened to check and maintain the impurities remaining on the screen surface or the steel wire clusters on the steel brush roller. The operation is convenient and efficient.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite water-soluble fertilizer crushing and screening machine, characterized in that: The system includes a storage bin, inside which a crushing mechanism and a screening mechanism located below the crushing mechanism are installed. The crushing mechanism includes a support frame and crushing rollers I and II arranged side-by-side on it. One end of crushing roller I passes through the support frame and is sequentially connected to a main crushing gear, a drive sprocket, and a reducer. One end of crushing roller II passes through the support frame and is connected to a driven crushing gear that meshes with the main crushing gear. The reducer is connected to a power motor. The screening mechanism includes a screening bin and steel brush rollers I and II arranged horizontally side-by-side inside it. The front end of the screening bin is equipped with a device capable of... The sieve door opens and closes securely with a fastener. A screen is laid on the surface of the screening chamber. One end of steel brush roller I penetrates the screening chamber and is sequentially connected to a main screening gear and a driven sprocket that meshes with the main screening gear. One end of steel brush roller II penetrates the screening chamber and is connected to a driven screening gear that meshes with the main screening gear. Several steel wire clusters are spirally and evenly laid on the surfaces of steel brush rollers I and II, and these clusters are in close contact with the screen surface. A feed channel is located at the top of the chamber, and a discharge channel is located at the bottom. The feed channel is located above the crushing mechanism, and the discharge channel is located below the screening mechanism.

2. The composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The silo body is made of stainless steel, and the interior of the silo body is hollow to form a fertilizer processing chamber. The crushing mechanism and the screening mechanism are arranged vertically and vertically along the central axis of the silo body.

3. The composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The mechanism support is a "well" shaped structure, with its front and rear ends fixed to the inside of the silo body by bolts, and horizontally mounted in the upper part of the silo body; the crushing roller I and crushing roller II are horizontally mounted side by side on the top of the mechanism support, with the axes of crushing roller I and crushing roller II on the same horizontal plane, and the surfaces of crushing roller I and crushing roller II are evenly distributed with protruding ridges, which are arranged in a spiral shape.

4. The composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The left end of the crushing roller I penetrates the left side wall of the mechanism support and is sequentially fixedly connected to the main crushing gear and the drive sprocket via a flat key. The side of the drive sprocket away from the main crushing gear is connected to the output end of the reducer via coupling I. The input end of the reducer is fixedly connected to the output shaft of the power motor via coupling II. The power motor is a three-phase asynchronous motor, which is fixed to the outside of the chamber via a motor bracket. The left end of the crushing roller II also penetrates the left side wall of the mechanism support and is fixedly connected to the driven crushing gear via a flat key. The driven crushing gear and the main crushing gear are in a horizontal meshing state.

5. A composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The top of the screening chamber is fixed to the bottom of the mechanism support by welding, forming a vertically connected space with the crushing mechanism. The bottom of the screening chamber has an opening, and an arc-shaped door is matched at the opening. One side of the door is hinged to the screening chamber by a hinge, and the other side of the door is fastened to the screening chamber by two symmetrically arranged fixing buckles. The fixing buckles adopt a press-type buckle structure.

6. The composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: Both the screening chamber and the hood are equipped with screens. The steel brush roller I and steel brush roller II are arranged horizontally side by side inside the screening chamber. The axis between steel brush roller I and steel brush roller II is parallel to the axis between crushing and rolling roller I and crushing and rolling roller II.

7. A composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The left end of steel brush roller I penetrates the left side of the screening chamber and is sequentially fixedly connected to the screening main gear and the driven sprocket via a flat key. The driven sprocket is connected to the driving sprocket of the crushing mechanism via chain drive. The left end of steel brush roller II penetrates the left side of the screening chamber and is fixedly connected to the screening driven gear via a flat key. The screening driven gear and the screening main gear are in a horizontal meshing state. The surfaces of steel brush roller I and steel brush roller II are uniformly fixed with several steel wire clusters in a spiral winding manner. The length of the steel wire clusters is set so that the free end of the steel wire cluster is in close contact with the upper surface of the screen.

8. A composite water-soluble fertilizer crushing and screening machine according to claim 1, characterized in that: The top of the silo is integrally formed with a feeding channel, which has a funnel-shaped structure. The bottom opening of the feeding channel is directly opposite the middle area between crushing roller I and crushing roller II. The bottom of the silo is integrally formed with a discharge channel, which has a sloping structure. The top feeding end of the discharge channel is located at the bottom of the screening silo.

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