Continuous operation earthwork mixing plant and working method thereof

Abstract

The invention relates to the technical field of earthwork mixing, in particular to a continuous operation earthwork mixing plant and a working method thereof.The continuous operation earthwork mixing plant comprises a smashing machine, a collecting hopper, an earthwork hopper, multiple sets of variable frequency conveying belts, a first lime hopper, a drying machine, a mixing hopper, a second lime hopper and a stirring machine, a vibration feeding hopper is arranged below the collection hopper, and the collection hopper inputs earthwork materials into the crusher through the vibration feeding hopper; according to the invention, the continuous crushing equipment is adopted to primarily crush the earthwork material, meanwhile, the primary water content control is realized, and then the accurate electronic weighing module is utilized to weigh the earthwork material and the lime powder, so that a large amount of earthwork and lime mixture with accurate water content and uniform stirring can be continuously produced.

Description

Technical Field

[0001] The invention relates to the technical field of earth mixing, in particular to a continuous operation earth mixing plant and a working method thereof. Background Art

[0002] An earth-mixing plant is a large-scale mechanical equipment assembly used for mixing and stirring earth materials. The earth-mixing plant can accurately control the ratio of earth and added materials and fully stir them, so that the mixed earth can meet the engineering design requirements in terms of moisture content, density, strength, etc., thereby ensuring the quality and stability of the project. For example, when constructing the roadbed of a highway, the earth processed by the mixing plant is used as roadbed filler, and its quality is uniform and stable, which can effectively prevent problems such as uneven settlement of the roadbed. When mixing earth materials and lime powder, the earth-mixing plant in the prior art usually mixes them into shape at one time, and the moisture content and stirring uniformity of the mixture are not accurately controlled. Summary of the invention

[0003] The object of the present invention is to provide a continuous operation earthwork mixing plant and a working method thereof to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous earthwork mixing plant, comprising a crusher, a collecting hopper, an earthwork hopper, a variable frequency conveyor belt, a first lime hopper, a dryer, a mixing hopper, a second lime hopper and a mixer, wherein the variable frequency conveyor belt is provided with multiple groups and can be frequency-controlled, a vibrating feeder hopper is provided below the collecting hopper, the collecting hopper inputs earthwork materials into the crusher through the vibrating feeder hopper, the earthwork hopper inputs earthwork materials into the collecting hopper through the corresponding variable frequency conveyor belt, and the first lime hopper inputs earthwork materials into the crusher through the corresponding variable frequency conveyor belt; the mixed material output by the crusher is conveyed through the variable frequency conveyor belt, passes through the dryer during the conveyance, and is finally output to the mixing hopper; the bottoms of the mixing hopper and the second lime hopper are respectively provided with electronic weighing modules, the electronic weighing modules can control the weight of the materials discharged from the mixing hopper and the second lime hopper, and the materials discharged from the mixing hopper and the second lime hopper are input into the mixer through the variable frequency conveyor belt.

[0005] An external mounting frame is fixedly provided on the outside of the collecting hopper, and the collecting hopper is fixedly installed with the crusher through the external mounting frame. A supporting spring is provided on the external mounting frame, and the supporting spring elastically supports the vibrating feeder hopper. An eccentric vibrating motor is fixedly provided on the outside of the vibrating feeder hopper.

[0006] A primary screen and a secondary screen are fixedly arranged in the collecting hopper, the aperture of the primary screen is larger than the aperture of the secondary screen, and the primary screen is located above the secondary screen.

[0007] The primary screen and the secondary screen are commonly connected and fixed with an associated shaft, a regulating air hood is fixedly provided at the lower end of the associated shaft, an air hood piston is provided in the regulating air hood, the air hood piston is in airtight contact with the regulating air hood, a split top shaft is fixedly provided on the lower surface of the air hood piston, and the lower end of the split top shaft is in contact with the upper surface of the vibrating feeder hopper.

[0008] The outer sleeve of the split top shaft is provided with a limiting collar, a collar support arm is fixedly provided between the limiting collar and the collecting hopper, and a corrugated dust cover is connected and provided between the limiting collar and the regulating air hood.

[0009] A movable inner groove and a pressure-changing chamber are provided in the sleeve support arm, a top shaft air circuit is provided in the split top shaft, a movable air pipe is provided in the movable inner groove, the pressure-changing chamber is connected with the top shaft air circuit through the movable air pipe, and the other end of the top shaft air circuit is connected with the upper surface of the air hood piston.

[0010] A material unloading push umbrella is fixedly provided on the outer surface of the split top shaft, and the material unloading push umbrella corresponds to the lower opening position of the collecting hopper. A pressure-changing piston is airtightly and slidingly provided in the pressure-changing chamber, a horizontal axis is fixedly provided on one side of the pressure-changing piston, and an extrusion vertical plate is fixedly provided on the end of the horizontal axis.

[0011] The external rotation of the collecting hopper is provided with a lever pressure plate, and the upper limit sliding installation of the lever pressure plate is provided with a screw sleeve, the screw sleeve can slide along the length direction of the lever pressure plate, and can rotate relative to the lever pressure plate, and a driving screw is inserted in the screw sleeve, and the driving screw is spirally matched with the screw sleeve. When the driving screw rotates, the lever pressure plate can be driven to rotate through the screw sleeve, and when the lever pressure plate rotates, the extrusion vertical plate can be extruded, driving the transformer piston to move axially.

[0012] A laser detection strip is embedded in one side surface of the interior of the collecting hopper, and a reflective panel is embedded in the other side surface of the interior of the collecting hopper. The laser detection strip cooperates with the reflective panel to detect the accumulation amount of earth and material above the primary screen and the secondary screen.

[0013] A working method of a continuous operation earthwork mixing plant, the working method comprising the following steps: Step 1: The earth hopper inputs the earth material into the collecting hopper through the variable frequency conveyor belt, and the collecting hopper feeds the material into the crusher through the vibrating feeder hopper; the first lime hopper inputs lime powder into the crusher through the variable frequency conveyor belt, and the conveying speed of the variable frequency conveyor belt is controlled by frequency conversion, so that the lime powder is proportional to the output earth material of the vibrating feeder hopper, so as to realize the preliminary water content control; Step 2: The crusher crushes and mixes the lime powder and earth material, dries them in a dryer, and then inputs them into a mixing hopper; Step 3: The mixing hopper and the second lime hopper are weighed and discharged through an electronic weighing module; Step 4: The output materials from the mixing hopper and the second lime hopper are input into the mixer through a variable frequency conveyor belt for mixing.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The continuous operation earthwork mixing plant of the present invention adopts continuous crushing equipment to preliminarily crush the earthwork materials, and realizes preliminary water content control at the same time, and then uses a precise electronic weighing module to weigh the earthwork materials and lime powder, and then transports the mixture to a mixer for stirring, and controls its water content, lime parameters, and stirring uniformity within the required index parameters. The present invention can continuously produce a large amount of earthwork lime mixtures with precise water content and uniform stirring, so as to realize factory-based and standardized production of high-quality earthwork lime mixtures.

[0015] The collecting hopper of the present invention can screen out larger particles of earth and discharge them in grades, which can be used for foundation filling or other non-structural purposes, while fine particles enter the next process for further crushing, thereby improving the control effect of earth particle size.

[0016] The present invention cooperates with the structures such as the associated shaft, the split top shaft and the transformer chamber, and can control the amplitude of the primary screen and the secondary screen according to the amount of earth above the primary screen and the secondary screen, so that when the amount of earth is large, the amplitude is automatically increased to speed up the screening of the earth material, and when the amount of earth is small, the amplitude is reduced to reduce unnecessary deformation fatigue loss of the primary screen and the secondary screen.

[0017] The present invention transmits the vibration of the vibrating feed hopper by separately setting the associated shaft and the split top shaft, so that while the amplitude of the primary screen and the secondary screen is dynamically adjusted, the amplitude of the split top shaft is still ensured to be always in a maximum state, so that the split top shaft can maintain high efficiency in promoting the discharge of earth and material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the continuous operation earth mixing plant of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the collecting hopper and the vibrating feeding hopper.

[0020] Figure 3 Schematic diagram of the internal structure of the collecting hopper and vibrating feed hopper.

[0021] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0022] Figure 5It is a three-dimensional half-section schematic diagram of the collecting hopper and the vibrating feeding hopper.

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of area B in the middle.

[0024] In the figure: 1. crusher; 2. collecting hopper; 3. vibrating feed hopper; 4. earthwork hopper; 5. frequency conversion conveyor belt; 6. first lime hopper; 7. dryer; 8. mixing hopper; 9. second lime hopper; 10. electronic weighing module; 11. mixer; 301. external mounting frame; 302. support spring; 303. eccentric vibration motor; 201. primary screen; 202. secondary screen; 203. associated shaft; 204. regulating air hood; 205. air Cover piston; 206, split top shaft; 207, limit collar; 208, collar support arm; 209, corrugated dust cover; 210, movable inner groove; 211, variable pressure chamber; 212, top shaft air circuit; 213, movable air pipe; 214, unloading push umbrella; 215, variable pressure piston; 216, horizontal shaft; 217, extrusion vertical plate; 218, lever pressure plate; 219, screw sleeve; 220, driving screw; 221, laser detection strip; 222, reflection panel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 6 The present invention provides a technical solution: a continuous operation earthwork mixing plant, such as Figure 1 As shown in the figure, it includes a crusher 1, a collecting hopper 2, an earthwork hopper 4, a variable frequency conveyor belt 5, a first lime hopper 6, a dryer 7, a mixing hopper 8, a second lime hopper 9 and a mixer 11, wherein the variable frequency conveyor belt 5 is provided with multiple groups and can be frequency-controlled. The frequency control of the variable frequency conveyor belt 5 is based on changing the frequency of the motor input power supply to achieve the adjustment of the motor speed, thereby controlling the running speed of the variable frequency conveyor belt 5.

[0027] A vibrating feeder 3 is provided below the collecting hopper 2. The collecting hopper 2 inputs earthwork materials into the crusher 1 through the vibrating feeder 3. The earthwork hopper 4 inputs earthwork materials into the collecting hopper 2 through the corresponding variable frequency conveyor belt 5. The first lime hopper 6 inputs earthwork materials into the crusher 1 through the corresponding variable frequency conveyor belt 5. The mixed material output from the crusher 1 is conveyed through the variable frequency conveyor belt 5, and passes through the dryer 7 during the process. The dryer 7 can spray hot air to dry the mixed material as needed, and finally output it to the mixing hopper 8. The bottom of the mixing hopper 8 and the second lime hopper 9 are respectively provided with an electronic weighing module 10, which can control the weight of the material discharged from the mixing hopper 8 and the second lime hopper 9. The material discharged from the mixing hopper 8 and the second lime hopper 9 is input into the mixer 11 through the variable frequency conveyor belt 5. The first lime hopper 6 and the second lime hopper 9 both store lime powder.

[0028] An external mounting frame 301 is fixedly provided on the outside of the collecting hopper 2, and the collecting hopper 2 is fixedly installed with the crusher 1 through the external mounting frame 301. A supporting spring 302 is provided on the external mounting frame 301, and the supporting spring 302 elastically supports the vibrating feed hopper 3. An eccentric vibration motor 303 is fixedly provided on the outside of the vibrating feed hopper 3.

[0029] A primary screen 201 and a secondary screen 202 are fixedly arranged in the collecting hopper 2. The aperture of the primary screen 201 is larger than that of the secondary screen 202. The primary screen 201 is located above the secondary screen 202. A discharge window is provided on the surface of the collecting hopper 2, corresponding to the primary screen 201 and the secondary screen 202, respectively. Figure 2 as shown in .

[0030] The primary screen 201 and the secondary screen 202 are commonly connected and fixed with an associated shaft 203, and a regulating air hood 204 is fixedly provided at the lower end of the associated shaft 203. A gas hood piston 205 is provided in the regulating air hood 204, and the gas hood piston 205 is in airtight contact with the regulating air hood 204. A split top shaft 206 is fixedly provided on the lower surface of the gas hood piston 205, and the lower end of the split top shaft 206 is in contact with the upper surface of the vibrating feed hopper 3.

[0031] The outer sleeve of the split top shaft 206 is provided with a limiting collar 207, a collar support arm 208 is fixedly provided between the limiting collar 207 and the collecting hopper 2, and a corrugated dust cover 209 is connected and provided between the limiting collar 207 and the regulating gas hood 204. An active inner groove 210 and a pressure-changing chamber 211 are provided in the collar support arm 208, a top shaft air path 212 is provided in the split top shaft 206, an active air pipe 213 is provided in the active inner groove 210, the pressure-changing chamber 211 is connected to the top shaft air path 212 through the active air pipe 213, and the other end of the top shaft air path 212 is connected to the upper surface of the gas hood piston 205.

[0032] A material unloading push umbrella 214 is fixedly provided on the outer surface of the split top shaft 206, and the material unloading push umbrella 214 corresponds to the lower opening position of the collecting hopper 2. A pressure-changing piston 215 is airtightly slidably provided in the pressure-changing chamber 211, and a horizontal shaft 216 is fixedly provided on one side of the pressure-changing piston 215, and an extrusion vertical plate 217 is fixedly provided on the end of the horizontal shaft 216.

[0033] The external rotation of the collecting hopper 2 is provided with a lever pressure plate 218, and the upper limit sliding installation of the lever pressure plate 218 is provided with a screw sleeve 219, the screw sleeve 219 can slide along the length direction of the lever pressure plate 218, and can rotate relative to the lever pressure plate 218, and a driving screw 220 is inserted in the screw sleeve 219, and the driving screw 220 is spirally matched with the screw sleeve 219. When the driving screw 220 rotates, the lever pressure plate 218 can be driven to rotate through the screw sleeve 219, and when the lever pressure plate 218 rotates, the extrusion vertical plate 217 can be extruded, and the variable pressure piston 215 can be driven to move axially.

[0034] A laser detection strip 221 is embedded and installed on one side surface of the interior of the aggregate hopper 2, and a reflective panel 222 is embedded and installed on the other side surface of the interior of the aggregate hopper 2. The laser detection strip 221 cooperates with the reflective panel 222 to detect the accumulation amount of earth and material above the primary screen 201 and the secondary screen 202. Laser radar can also be used to scan and analyze the accumulation amount. The above is a common device in the prior art and will not be repeated in this application.

[0035] A working method of a continuous operation earthwork mixing plant, the working method comprising the following steps: Step 1: The earth hopper 4 inputs the earth material into the collecting hopper 2 through the variable frequency conveyor belt 5, and the collecting hopper 2 feeds the material into the crusher 1 through the vibrating feeder 3; the first lime hopper 6 inputs lime powder into the crusher 1 through the variable frequency conveyor belt 5, and the conveying speed of the variable frequency conveyor belt 5 is controlled by frequency conversion, so that the lime powder is proportional to the output earth material of the vibrating feeder hopper 3, so as to realize the preliminary water content control; Step 2: The pulverizer 1 pulverizes and mixes the lime powder and the earth material, and after drying in the dryer 7, the mixture is input into the mixing hopper 8; Step 3: The mixing hopper 8 and the second lime hopper 9 are weighed and discharged through the electronic weighing module 10; Step 4: The output materials of the mixing hopper 8 and the second lime hopper 9 are input into the mixer 11 through the variable frequency conveyor belt 5 for mixing.

[0036] The collecting hopper 2 in the present invention is as follows Figure 3 and Figure 4As shown in , during use, the earth hopper 4 inputs the earth into the collecting hopper 2 through the variable frequency conveyor belt 5; the eccentric vibration motor 303 runs to drive the vibrating feeder 3 to vibrate, and the vibrating feeder 3 drives the primary screen 201 and the secondary screen 202 to vibrate up and down through the conduction of the split top shaft 206 and the associated shaft 203, so that the earth input into the collecting hopper 2 is screened, and the earth with larger particles stays on the primary screen 201 and the secondary screen 202 respectively, and is discharged with the vibration; the earth with smaller particles falls on the vibrating feeder 3, and the vibrating feeder 3 feeds through vibration, and the feeding flow of the vibrating feeder 3 is controlled by controlling the amplitude and frequency of the vibrating feeder 3. As shown in Figure 1 As shown in the figure, the first lime hopper 6 inputs lime powder into the crusher 1 through the variable frequency conveyor belt 5. At this time, by controlling the transmission speed of the variable frequency conveyor belt 5, the lime powder flow input to the crusher 1 and the feeding flow of the vibrating feeder hopper 3 are adapted in proportion to achieve preliminary humidity control.

[0037] like Figure 6 As shown in , due to the limit of the limit ring 207, the split top shaft 206 is in a lifting vibration state under the vibration drive of the vibrating feeder 3. When the split top shaft 206 is in the upward stroke in the vibration amplitude, the gas cover piston 205 moves up synchronously. At this time, there is positive pressure above the gas cover piston 205, and the gas cover piston 205 pushes the associated shaft 203 upward through air pressure to achieve vibration conduction. At this time, the gas in the space above the gas cover piston 205 will be compressed to a certain extent, and the degree of compression is related to the air pressure of the space above the gas cover piston 205 in the initial state. When the air pressure of the space above the gas cover piston 205 in the initial state is greater, the degree of compression of the gas in the space above the gas cover piston 205 is smaller during the process of conducting the upward vibration, thereby reducing the amplitude during the conduction process.

[0038] When the driving screw 220 rotates, it can drive the screw sleeve 219 to move horizontally. The driving screw 220 is driven by a motor. When the screw sleeve 219 moves horizontally, it can drive the lever pressure plate 218 to rotate. The lever pressure plate 218 squeezes and drives the extrusion vertical plate 217, so that the variable pressure piston 215 moves axially, so that the gas in the variable pressure chamber 211 can be squeezed into the space above the gas cover piston 205 through the active air pipe 213 and the top shaft air path 212, so as to change the pressure of the gas in the space above the gas cover piston 205; when the laser detection bar 221 and the reflection panel 222 detect that there are a lot of earth and material piled above the primary screen 201 and the secondary screen 202, the gas pressure in the space above the gas cover piston 205 is increased, and the weakening of the amplitude in the conduction process is reduced, so that the primary screen 201 and the secondary screen 202 vibrate greatly, thereby improving efficiency; on the contrary, the amplitude is reduced to reduce unnecessary deformation fatigue loss.

[0039] In the process of adjusting the amplitude of the associated shaft 203, the split top shaft 206 can maintain the maximum amplitude state through the structural setting. At this time, the split top shaft 206 can effectively promote the falling of earth and material at the discharge port of the collecting hopper 2 by driving the discharge push umbrella 214 to rise and fall and vibrate, thereby reducing the probability of accumulation and jamming.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous operation earthwork mixing plant, comprising a crusher (1), a collecting hopper (2), an earthwork hopper (4), a variable frequency conveyor belt (5), a first lime hopper (6), a drying machine (7), a mixing hopper (8), a second lime hopper (9) and a mixer (11), wherein the variable frequency conveyor belt (5) is provided with a plurality of groups and can be frequency-controlled, and is characterized in that: A vibrating feed hopper (3) is provided below the collecting hopper (2). The collecting hopper (2) inputs earthwork materials into the crusher (1) through the vibrating feed hopper (3). The earthwork hopper (4) inputs earthwork materials into the collecting hopper (2) through a corresponding variable frequency conveyor belt (5). The first lime hopper (6) inputs earthwork materials into the crusher (1) through a corresponding variable frequency conveyor belt (5). The mixed material output from the crusher (1) is transported through the variable frequency conveyor belt (5), passes through a dryer (7), and is finally output to the mixing hopper (8). The bottoms of the mixing hopper (8) and the second lime hopper (9) are respectively provided with electronic weighing modules (10). The electronic weighing modules (10) are capable of controlling the weight of the materials discharged from the mixing hopper (8) and the second lime hopper (9). The materials discharged from the mixing hopper (8) and the second lime hopper (9) are input to the mixer (11) through the variable frequency conveyor belt (5).

2. The continuous operation earthwork mixing plant according to claim 1 is characterized by: An external mounting frame (301) is fixedly provided on the outside of the collecting hopper (2); the collecting hopper (2) is fixedly mounted on the pulverizer (1) via the external mounting frame (301); a support spring (302) is provided on the external mounting frame (301); the support spring (302) elastically supports the vibrating feed hopper (3); and an eccentric vibrating motor (303) is fixedly provided on the outside of the vibrating feed hopper (3).

3. The continuous operation earthwork mixing plant according to claim 1 is characterized in that: A primary screen (201) and a secondary screen (202) are fixedly arranged in the collecting hopper (2); the sieve hole diameter of the primary screen (201) is larger than the sieve hole diameter of the secondary screen (202); and the primary screen (201) is located above the secondary screen (202).

4. The continuous operation earthwork mixing plant according to claim 3 is characterized by: The primary screen (201) and the secondary screen (202) are commonly connected and fixed with an associated shaft (203); a regulating air hood (204) is fixedly provided at the lower end of the associated shaft (203); a gas hood piston (205) is provided in the regulating air hood (204); the gas hood piston (205) is in airtight contact with the regulating air hood (204); a split top shaft (206) is fixedly provided on the lower surface of the gas hood piston (205); the lower end of the split top shaft (206) is in contact with the upper surface of the vibrating feed hopper (3).

5. The continuous operation earthwork mixing plant according to claim 4 is characterized by: The split top shaft (206) is externally sleeved with a limiting collar (207), a collar support arm (208) is fixedly provided between the limiting collar (207) and the collecting hopper (2), and a corrugated dust cover (209) is connected between the limiting collar (207) and the regulating air hood (204).

6. The continuous operation earthwork mixing plant according to claim 5 is characterized by: The sleeve support arm (208) is provided with a movable inner groove (210) and a pressure-changing chamber (211); the split top shaft (206) is provided with a top shaft air path (212); a movable air pipe (213) is provided in the movable inner groove (210); the pressure-changing chamber (211) is connected to the top shaft air path (212) via the movable air pipe (213); and the other end of the top shaft air path (212) is connected to the upper surface of the gas cover piston (205).

7. The continuous operation earthwork mixing plant according to claim 6 is characterized by: A material discharge push umbrella (214) is fixedly provided on the outer surface of the split top shaft (206), and the material discharge push umbrella (214) corresponds to the lower opening position of the collecting hopper (2). A pressure-changing piston (215) is airtightly slidably provided in the pressure-changing chamber (211), a horizontal shaft (216) is fixedly provided on one side of the pressure-changing piston (215), and an extrusion vertical plate (217) is fixedly provided at the end of the horizontal shaft (216).

8. The continuous operation earthwork mixing plant according to claim 7 is characterized by: The collecting hopper (2) is provided with a lever pressure plate (218) for rotation outside. The lever pressure plate (218) is provided with a screw sleeve (219) for sliding at the upper limit position. The screw sleeve (219) can slide along the length direction of the lever pressure plate (218) and can rotate relative to the lever pressure plate (218). A driving screw (220) is inserted in the screw sleeve (219). The driving screw (220) is screw-matched with the screw sleeve (219). When the driving screw (220) rotates, the lever pressure plate (218) can be driven to rotate through the screw sleeve (219). When the lever pressure plate (218) rotates, the extrusion vertical plate (217) can be extruded to drive the variable pressure piston (215) to move axially.

9. The continuous operation earthwork mixing plant according to claim 8, characterized in that: A laser detection strip (221) is embedded and installed on one side surface of the interior of the collecting hopper (2), and a reflection panel (222) is embedded and installed on the other side surface of the interior of the collecting hopper (2). The laser detection strip (221) cooperates with the reflection panel (222) to detect the accumulation amount of earth and material above the primary screen (201) and the secondary screen (202).

10. A working method of a continuous earth-mixing plant according to any one of claims 1 to 9, characterized in that: The working method comprises the following steps: Step 1: The earth hopper (4) inputs the earth material into the collecting hopper (2) through the variable frequency conveyor belt (5), and the collecting hopper (2) feeds the material into the crusher (1) through the vibrating feeder hopper (3); the first lime hopper (6) inputs lime powder into the crusher (1) through the variable frequency conveyor belt (5), and the conveying speed of the variable frequency conveyor belt (5) is controlled by frequency conversion so that the lime powder is proportional to the earth material output from the vibrating feeder hopper (3), thereby realizing preliminary water content control; Step 2: The pulverizer (1) pulverizes and mixes the lime powder and the earth material, dries them in the dryer (7), and then inputs them into the mixing hopper (8); Step 3: The mixing hopper (8) and the second lime hopper (9) are weighed and discharged through an electronic weighing module (10); Step 4: The output materials from the mixing hopper (8) and the second lime hopper (9) are input into the mixer (11) through the variable frequency conveyor belt (5) for mixing.

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