Raw material crushing device for preparing potassium humate fertilizer based on coal gangue

Abstract

The application relates to the technical field of crushing equipment and discloses raw material crushing equipment based on a humic acid potassium fertilizer preparation process of coal gangue, which comprises two crushing devices arranged in a shell, the crushing device comprises a positioning rotating shaft rotationally connected with the shell, a plurality of rotors arranged at equal intervals are fixedly installed on the positioning rotating shaft, a plurality of limiting shafts are arranged on the rotors, a linkage disc is movably sleeved on the limiting shafts, a linkage shaft is fixedly connected to the other side outer edge of the linkage disc, and a pendulum bob is movably sleeved on the linkage shaft. The movable linkage disc is arranged on one side of the rotor, the linkage shaft movably sleeved with the pendulum bob is arranged on one side of the linkage disc, the protrusion on the other side of the linkage disc is matched with the second insertion slot on the rotor in a clamping mode, the protrusion is separated by moving the linkage disc, the radial distance between the linkage shaft and the positioning rotating shaft is increased by rotating the linkage disc, the abrasion and consumption of the working surface at the front end of the pendulum bob are compensated, and the particle size required by the humic acid potassium fertilizer preparation process can be obtained when the coal gangue is crushed subsequently.

Description

Technical Field

[0001] This application relates to the field of crushing equipment technology, and in particular to raw material crushing equipment based on the process of preparing potassium humate fertilizer from coal gangue. Background Technology

[0002] Coal gangue, a solid waste generated during coal mining and washing, not only occupies land but also easily causes environmental pollution when stored for a long time. Therefore, it is of great significance to effectively utilize the humic acid resources in coal gangue and develop environmentally friendly and efficient methods for preparing potassium humate fertilizer from it. This involves pre-treating coal gangue through physical or chemical activation to extract the humic acid components, then reacting them with potassium-containing compounds via a complexation reaction. After drying, pulverizing, and other post-processing, potassium humate fertilizer is obtained. This provides a new technological approach for the high-value utilization of coal gangue and the production of humic acid fertilizers. Before preparing potassium humate fertilizer from coal gangue, the raw material needs to be pulverized to improve the contact reaction in the preparation process. Since coal gangue generally contains a certain amount of viscosity and moisture, traditional crushers with screens are prone to clogging. Therefore, a double-stage screenless pulverizer is often used to pulverize the raw material.

[0003] For example, Chinese utility model patent application number 2024232020328 discloses a two-stage crusher with dustproof function. It drives the crushing roller to rotate by a transmission belt driven by a servo motor. The high-speed rotation of the pendulum on the crushing roller can crush and impact coal gangue raw materials without being affected by the stickiness and moisture of the coal gangue.

[0004] However, when using existing double-stage screenless crushers, coal gangue contains high-hardness minerals such as quartz, which have strong abrasive properties. Under high-speed impact and material grinding, the working surface of the pendulum hammer is easily worn. As the pendulum hammer wears, the distance between the hammer and the inner lining of the machine increases, the particle size of the crushed coal gangue becomes larger, and the crushing effect is reduced. Summary of the Invention

[0005] This application proposes a raw material crushing device based on the process of preparing potassium humate fertilizer from coal gangue. It has the advantage of being easy to compensate for the wear and tear of the working surface at the front end of the pendulum hammer, which solves the problem that the crushing effect of coal gangue deteriorates due to the wear of the pendulum hammer when crushing coal gangue raw materials in the existing double-stage screenless crusher.

[0006] To achieve the above objectives, this application adopts the following technical solution: a raw material crushing device based on the process of preparing potassium humate fertilizer from coal gangue, comprising two crushing devices installed inside a casing. The casing has an inner liner located outside the crushing devices. Each crushing device includes a positioning shaft rotatably connected to the casing. Both ends of the positioning shaft are rotatably connected to the sides of the casing via bearings, minimizing frictional resistance during rotation to drive the positioning shaft at high speed. A pulley located outside the casing is fixedly installed at one end of the positioning shaft. A motor drives the pulley to rotate the positioning shaft. Multiple rotors arranged at equal intervals are fixedly installed on the positioning shaft. Each rotor has multiple circumferentially arrayed limiting shafts, the number of which can be four. A first slot located outside the limiting shaft is opened on one side of the rotor. A second slot is opened on the rotor located inside the first slot. A linkage disc adapted to the first slot is movably fitted on the limiting shaft. One side of the linkage disc has a protrusion adapted to the second slot. The linkage disc is restricted inside the first slot by a limiting component. A linkage shaft is fixedly connected to the outer edge, and a pendulum for crushing coal gangue raw materials is movably mounted on the linkage shaft. After the protrusion is separated from the second slot by moving the linkage disc, the linkage disc is rotated to increase the radial distance of the linkage shaft relative to the positioning shaft, thereby compensating for the wear and tear on the working surface of the pendulum's front end. When the positioning shaft drives the rotor to rotate at high speed, the second slot and the protrusion are engaged to drive the linkage disc to rotate, which in turn drives the linkage shaft and the pendulum to rotate at high speed. The high-speed rotation of the pendulum is used to crush the coal gangue added into the machine casing. When the working surface of the pendulum's front end shows wear and tear after a period of use (i.e., when the particle size of the crushed coal gangue increases significantly, it can be judged that the wear and tear on the pendulum is large. At this time, the machine casing can be disassembled for inspection to determine whether one or more of them are experiencing wear and tear), the linkage disc is moved to separate the protrusion from the second slot. By rotating the linkage disc, the linkage shaft is moved closer to the outer edge of the rotor, thereby compensating for the wear and tear on the pendulum and ensuring that the particle size required for the potassium humate fertilizer preparation process can be obtained when crushing coal gangue in the future.

[0007] Furthermore, the housing includes a fixedly installed positioning shell, and a rotating shell is rotatably connected to the top of the positioning shell. The rotatable connection between the positioning shell and the rotating shell is located on one side of the lower crushing device. The rotating shell can be opened by rotating to allow for the maintenance and replacement of the internal components of the housing.

[0008] Furthermore, the inner lining is composed of multiple lining plates spliced ​​along the inner wall of the casing, so that the multiple lining plates can be spliced ​​into an arc shape, which, together with the high-speed rotating pendulum, crushes the coal gangue.

[0009] Furthermore, the liner is made of modified high-manganese steel (ZGMn13Cr2 / ZGMn18Cr2), and the pendulum is made of high-chromium cast iron (Cr20-Cr28) to match the high hardness and high moisture content of coal gangue, thus avoiding premature failure due to material incompatibility.

[0010] Furthermore, a balance wheel is fixedly installed at the other end of the positioning shaft outside the machine housing. When the positioning shaft drives the rotor and pendulum to rotate at high speed to crush coal gangue, the rotor speed fluctuates periodically because the hammer impacts the material intermittently (the working stroke crushes the material, and the idle stroke only overcomes resistance). By adding the balance wheel at the other end of the positioning shaft, the pendulum stores kinetic energy during the idle stroke and releases it during the working stroke due to its large moment of inertia, thus reducing the speed fluctuation and preventing the motor from overloading due to sudden load changes. Moreover, when crushing hard materials such as high-moisture coal gangue, the addition of the balance wheel can significantly reduce the severe vibration caused by material blockage or uneven impact, protecting the bearings and transmission system.

[0011] Furthermore, limiting blocks are fixedly fitted at both ends of the limiting shaft. One limiting block is located outside a rotor at one end of the limiting shaft and is movably sleeved with the rotor. The other limiting block is located outside a rotor at the other end of the limiting shaft. Limiting sleeves are movably fitted on the limiting shaft between the limiting block and the rotor, and between two adjacent rotors. The limiting sleeves are limiting components used to restrict the linkage plate inside the first slot. The design of the limiting blocks at both ends of the limiting shaft, together with the addition of the limiting components, makes the limiting shaft stably restricted on each rotor and will not move relative to the rotor. This facilitates the movement of the linkage plate on the limiting shaft along the limiting shaft to compensate for the wear and tear of the pendulum.

[0012] Furthermore, the limiting sleeve is composed of two semi-cylindrical tubes spliced ​​together. One end of the limiting sleeve is movably connected to the linkage disc, the other end of the limiting sleeve located between two adjacent rotors is movably connected to one of the rotors, and the other end of the limiting sleeve located between the outermost rotor and the limiting block is movably connected to one side of the limiting block. The two semi-cylindrical tubes are fitted onto the limiting shaft and then fixed with bolts, thereby limiting the linkage disc on one side and preventing the linkage disc from moving away from the rotor, thus ensuring that the rotor drives the linkage disc, linkage shaft and pendulum to rotate together.

[0013] Furthermore, the limiting component includes a limiting spring that is movably fitted outside the limiting shaft. The limiting spring is used to restrict the linkage disc inside the first slot. Utilizing the elastic force of the limiting spring, the linkage disc is normally fitted into the first slot. Then, when the positioning shaft drives the rotor to rotate, the protrusion on one side of the linkage disc engages with the second slot, causing the linkage disc, linkage shaft, and pendulum to rotate around the axis of the limiting shaft. The high-speed rotation of the pendulum is used to crush the coal gangue raw material. When the working surface at the front end of the pendulum needs to be compensated for wear, the linkage disc at that pendulum location is moved to further compress the limiting spring. The rotatable linkage disc brings the linkage shaft closer to the outer edge of the rotor, and the elastic force of the limiting spring is used to re-engage the protrusion with the second slot. Compared to manually disassembling the limiting sleeve, compensating for the wear of the pendulum is more convenient.

[0014] Furthermore, the second slot is composed of multiple identical toothed grooves arranged in a circumferential array. The protrusion is integrally formed with the linkage disk. By rotating the linkage disk, the position of the linkage shaft and the pendulum relative to the rotor is adjusted. To compensate for the wear and tear of the working surface at the front end of the pendulum, only the angular distance between two adjacent toothed grooves needs to be rotated. This ensures that the rotor can drive the linkage disk to rotate stably and at high speed, so that the pendulum can crush the coal gangue. At the same time, it also increases the number of compensations on the working surface at the front end of the pendulum, thereby making the accuracy of each compensation distance value higher and avoiding the problem of overcompensation or undercompensation. Moreover, the protrusion design on one side of the linkage disk is larger in size than the method of setting an eccentric wheel on the outside of the linkage disk and setting a gear toothed groove meshing transmission on the inside of the linkage disk. This results in stronger rigidity and better impact resistance.

[0015] Furthermore, a circular groove is formed on the side of the rotor away from the linkage disc. The number of circular grooves is the same as the number of linkage discs, and the positions of the circular grooves correspond one-to-one with the positions of the linkage discs. A rotatable driven disc is movably fitted inside the circular groove. The middle part of the driven disc is movably fitted to the limiting shaft. A support tube is fixedly connected to the outside of the driven disc. The end of the linkage shaft away from the linkage disc on one of the rotors is movably fitted to the support tube on the other rotor adjacent to that rotor. The movable distance of one end of the linkage shaft within the support tube is greater than the depth of the protrusion inserted into the second slot. The distance between one side of the pendulum and one side of the support tube is... The value is greater than the depth of the protrusion inserted into the second slot, so that the support tube forms a stable support at the end of the linkage shaft away from the linkage disc. The support tube and the rotor are integrally molded, which makes the support effect better. At the same time, it does not affect the movement of the linkage shaft along the support tube. That is, by removing one of the limiting sleeves, the linkage disc and linkage shaft on one side of the limiting sleeve can move relative to the support tube. This separates the protrusion on one side of the linkage disc from the second slot. Then, by rotating the linkage disc, the support tube and the driven disc rotate accordingly, so that the linkage shaft is closer to the outer edge of the rotor, and the protrusion is inserted into the second slot, thereby compensating for the wear and tear of the pendulum.

[0016] The beneficial effects of this invention are as follows: 1. The raw material crushing equipment for the process of preparing potassium humate fertilizer from coal gangue provided in this application has a movable linkage disc on one side of the rotor, and a linkage shaft that is movably connected to the pendulum on one side of the linkage disc. The protrusion on the other side of the linkage disc engages with the second slot on the rotor. While the rotor drives the linkage disc and the pendulum to rotate at high speed to crush the coal gangue, the protrusion is separated by moving the linkage disc, and the linkage disc is rotated to bring the linkage shaft closer to the outer edge of the rotor. This compensates for the wear and tear on the working surface of the pendulum front end, ensuring that the particle size required for the preparation of potassium humate fertilizer can be obtained when crushing coal gangue in the subsequent process.

[0017] 2. By moving the linkage disc to separate the protrusions and then rotating the linkage disc to bring the linkage shaft closer to the outer edge of the rotor, the wear and tear on the working surface of the pendulum front end is compensated. This method eliminates the need for disassembly for compensation, making it convenient for operators and improving the compensation efficiency of the pendulum wear surface. This, in turn, helps to improve the overall efficiency of the potassium humate fertilizer preparation process. Furthermore, the protrusions on the side of the linkage disc engage with the second slot, effectively ensuring the rigidity of the engagement point between the linkage disc and the rotor. This provides good impact resistance and can withstand the reaction force during coal gangue crushing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the middle section structure; Figure 3 for Figure 2 The right view; Figure 4 for Figure 2 A complete structural diagram of the medium-sized crushing device; Figure 5 for Figure 4 A schematic diagram of the connection structure between one of the rotors and the pendulum; Figure 6 for Figure 5 The right view; Figure 7 for Figure 5 The left view; Figure 8 for Figure 5 Schematic diagram of the middle rotor; Figure 9 for Figure 8 The left view; Figure 10 for Figure 8 The right view; Figure 11 for Figure 5 A schematic diagram of the structure of one of the linkage disks; Figure 12 for Figure 11 The right view; Figure 13 for Figure 11 The left view; Figure 14 This is a schematic diagram of the connection structure between one of the rotors and the pendulum in Embodiment 2.

[0019] In the diagram: 1. Positioning shell; 2. Rotating shell; 3. Crushing device; 301. Positioning shaft; 302. Pulley; 303. Balance wheel; 304. Rotor; 3041. First slot; 3042. Second slot; 3043. Circular groove; 305. Limiting shaft; 306. Limiting block; 307. Limiting sleeve; 308. Linkage disc; 3081. Protrusion; 309. Linkage shaft; 310. Pendulum; 311. Limiting spring; 312. Passive disc; 313. Support tube; 4. Liner. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, as Figures 1-3 A raw material crushing device for preparing potassium humate fertilizer from coal gangue includes a casing, which comprises a fixed positioning shell 1 and a rotatable rotating shell 2. Two crushing devices 3 are installed inside the casing, and an inner liner 4 is fixedly installed on the inner wall of the casing outside the crushing devices 3. The inner liner 4 is composed of multiple liner plates spliced ​​along the inner wall of the casing. The top of the casing has a feeding port located above one of the crushing devices 3, through which the coal gangue to be crushed is fed and crushed sequentially by the two crushing devices 3 inside the casing. The bottom of the casing has a discharge port located directly below the other crushing device 3, through which the crushed coal gangue is discharged.

[0022] like Figures 2-7The crushing device 3 includes a positioning shaft 301 rotatably connected to the housing. Both ends of the positioning shaft 301 are rotatably connected to the housing via bearings. One end of the positioning shaft 301 is fixedly mounted with a pulley 302 located outside the housing. This pulley 302 drives the positioning shaft 301 to rotate via belt drive (belt drive between pulleys is a known technology; for example, Chinese utility model patent CN209061246U discloses a dual-stage crusher, whose description describes a specific implementation where "the motor 8 is connected to an external power source, and two motors 8 drive the pulley 6 to rotate via a transmission belt 7, which in turn drives two interconnected rotors to rotate simultaneously at high speed," which will not be elaborated upon here). The other end of the positioning shaft 301 is fixedly mounted with a balance wheel 303 located outside the housing. 1. Multiple rotors 304 are fixedly installed at equal intervals. The rotors 304 are located inside the housing, and there are no fewer than two rotors 304. Four limiting shafts 305 are movably fitted on the rotors 304, and the four limiting shafts 305 are distributed in a circumferential array on the rotors 304. Limiting blocks 306 are fixedly fitted at both ends of the limiting shafts 305. Two limiting blocks 306 are located on the outside of the two outermost rotors 304. One limiting block 306 is located on the outside of one rotor 304 at one end of the limiting shaft 305, and the limiting block 306 is movably fitted with the rotor 304. The other limiting block 306 is located on the outside of one rotor 304 at the other end of the limiting shaft 305. Limiting sleeves 307 are movably fitted on the limiting shafts 305 between the limiting block 306 and the rotor 304, and between two adjacent rotors 304. The limiting sleeves 307 are spliced ​​together from two semi-cylindrical tubes.

[0023] like Figures 4-10 A first slot 3041 is provided on one side of the rotor 304, located outside the limiting shaft 305. The central axis of the first slot 3041 is collinear with the central axis of the limiting shaft 305. A second slot 3042 is provided on the rotor 304, located inside the first slot 3041. The second slot 3042 is composed of a plurality of toothed grooves arranged in a circumferential array. A linkage disc 308 is movably fitted on the limiting shaft 305, and the linkage disc 308 is movably engaged with the first slot 3041. Figures 11-13 One side of the linkage disk 308 is provided with a protrusion 3081 that is adapted to the second slot 3042. The outer edge of the linkage disk 308 away from the protrusion 3081 is fixedly connected to the linkage shaft 309, and the pendulum 310 is movably mounted on the linkage shaft 309.

[0024] like Figures 4-5 and Figure 7A circular groove 3043 is formed on the side of rotor 304 away from linkage disc 308. The number of circular grooves 3043 is the same as the number of linkage discs 308, and the positions of the circular grooves 3043 correspond one-to-one with the positions of the linkage discs 308. A rotatable driven disc 312 is movably sleeved in the circular groove 3043. The middle part of the driven disc 312 is movably sleeved with the limiting shaft 305. A support tube 313 is fixedly connected to the outer side of the driven disc 312. One end of the linkage shaft 309 away from the linkage disc 308 on one of the rotors 304 is movably sleeved with the support tube 313 on the side of the other rotor 304 adjacent to that rotor 304. The movable distance of one end of the linkage shaft 309 within the support tube 313 is greater than the insertion distance of the protrusion 3081. The depth of the pendulum 310 into the second slot 3042 is such that the distance between one side of the pendulum 310 and the side of the support tube 313 is greater than the depth of the protrusion 3081 inserted into the second slot 3042. That is, the support tube 313 has a reserved distance for the movement of one end of the linkage shaft 309. After removing one of the limiting sleeves 307, the linkage disk 308 and the linkage shaft 309 on one side of the limiting sleeve 307 can move relative to the support tube 313. This allows the protrusion 3081 on one side of the linkage disk 308 to separate from the second slot 3042. Then, by rotating the linkage disk 308, the linkage shaft 309 is brought closer to the outer edge of the rotor 304, and the protrusion 3081 is inserted into the second slot 3042, thereby compensating for the wear and tear of the pendulum 310.

[0025] In operation, two motors first drive two pulleys 302 to rotate the positioning shaft 301. This, in turn, causes the positioning shaft 301 to rotate the rotor 304, linkage disc 308, linkage shaft 309, and pendulum 310 around the axis of the positioning shaft 301. The coal gangue raw material to be crushed is added through the feed port of the machine casing. The pendulum 310, rotating at high speed with the rotor 304 and positioning shaft 301, works in conjunction with the lining 4 inside the positioning shell 1 to crush the passing coal gangue raw material. After being graded and crushed by the two crushing devices 3 positioned above and below, the coal gangue raw material exits from the bottom of the machine casing. After the material is discharged from the discharge port, when the working surface of the front end of the pendulum 310 is worn, remove the limiting sleeve 307 on one side of the pendulum 310 so that the linkage shaft 309 and linkage disc 308 on the pendulum 310 can move relative to the rotor 304, so that the protrusion 3081 is separated from the second slot 3042. By rotating the linkage disc 308, the linkage shaft 309 is brought closer to the outer edge of the rotor 304. Then, the linkage disc 308 and linkage shaft 309 are moved in the opposite direction so that the protrusion 3081 is reinserted into the second slot 3042. Finally, the limiting sleeve 307 is reinstalled for fixation.

[0026] Example 2, as Figure 14The raw material crushing equipment based on the coal gangue potassium humate fertilizer preparation process differs from Embodiment 1 in that a limiting spring 311 is movably mounted on the limiting shaft 305 on one side of the linkage disc 308. By replacing the limiting sleeve 307 with the limiting spring 311, the linkage disc 308 is normally fitted into the first slot 3041, allowing the linkage disc 308 to rotate at high speed with the rotor 304. When the working surface of the pendulum 310 experiences wear and requires compensation, the linkage disc 308 at the pendulum 310 is moved by overcoming the elasticity of the limiting spring 311. The linkage disc 308 can be rotated to bring the linkage shaft 309 closer to the outer edge of the rotor 304. Then, the elasticity of the limiting spring 311 is used to re-engage the protrusion 3081 with the first slot 3041. Compared with manually disassembling the limiting sleeve 307, compensating for the wear of the pendulum 310 is more convenient.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A raw material crushing device for preparing potassium humate fertilizer from coal gangue, comprising two crushing devices disposed within a casing, the casing having an inner liner located outside the crushing devices, each crushing device including a positioning shaft rotatably connected to the casing, one end of the positioning shaft having a pulley fixedly mounted outside the casing, and multiple rotors arranged at equal intervals fixedly mounted on the positioning shaft, characterized in that... The rotor is provided with multiple circumferentially arrayed limiting shafts, and a first slot located outside the limiting shaft is opened on one side of the rotor. A second slot is opened on the rotor located inside the first slot. A linkage disc adapted to the first slot is movably mounted on the limiting shaft, and a protrusion adapted to the second slot is provided on one side of the linkage disc. The linkage disc is restricted to the inside of the first slot by a limiting component. A linkage shaft is fixedly connected to the outer edge of the other side of the linkage disc. A pendulum for crushing coal gangue raw materials is movably mounted on the linkage shaft. By moving the linkage disc to separate the protrusion from the second slot, and then rotating the linkage disc to increase the radial distance of the linkage shaft relative to the positioning shaft, the wear and tear on the working surface of the pendulum front end is compensated.

2. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The housing includes a fixedly installed positioning shell, and a rotating shell is rotatably connected above the positioning shell. The rotatable connection between the positioning shell and the rotating shell is located on one side of the lower crushing device.

3. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The lining is made up of multiple lining plates spliced ​​along the inner wall of the housing.

4. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 3, characterized in that, The liner is made of modified high-manganese steel, and the pendulum is made of high-chromium cast iron.

5. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The other end of the positioning shaft is fixedly mounted with a balance wheel located outside the housing.

6. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, Limiting blocks are fixedly fitted at both ends of the limiting shaft. One limiting block is located outside a rotor at one end of the limiting shaft and is movably sleeved with the rotor. The other limiting block is located outside a rotor at the other end of the limiting shaft. A limiting sleeve is movably fitted on the limiting shaft between the limiting block and the rotor, and between two adjacent rotors. The limiting sleeve is a limiting component used to restrict the linkage plate inside the first slot.

7. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 6, characterized in that, The limiting sleeve is composed of two semi-cylindrical tubes joined together, and one end of the limiting sleeve is movably connected to the linkage plate.

8. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The limiting assembly includes a limiting spring that is movably fitted on the outside of the limiting shaft, the limiting spring being used to restrict the linkage plate inside the first slot.

9. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The second slot is composed of multiple identical toothed circular arrays, and the protrusion is integrally formed with the linkage disk.

10. The raw material crushing equipment for the process of preparing potassium humate fertilizer based on coal gangue according to claim 1, characterized in that, The rotor has a circular groove on the side away from the linkage disc. The number of circular grooves is the same as the number of linkage discs, and the positions of the circular grooves correspond one-to-one with the positions of the linkage discs. A rotatable passive disc is movably fitted inside the circular groove. The middle part of the passive disc is movably fitted to the limiting shaft. A support tube is fixedly connected to the outside of the passive disc. The end of the linkage shaft away from the linkage disc on one of the rotors is movably fitted to the support tube on the other rotor adjacent to that rotor. The movable distance of one end of the linkage shaft in the support tube is greater than the depth of the protrusion inserted into the second slot. The distance between one side of the pendulum and one side of the support tube is greater than the depth of the protrusion inserted into the second slot.

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