Continuous stirring production equipment for phosphogypsum water-stable material

Abstract

The utility model relates to continuous stirring equipment, in particular to continuous stirring production equipment for a phosphogypsum water-stable material. Comprising a batching mechanism, cement discharging mechanisms, a multi-stage stirring mechanism and a finished product discharging mechanism, the multi-stage stirring mechanism is arranged at one end of the batching mechanism, the batching mechanism is connected with the multi-stage stirring mechanism through a belt conveyor, the cement discharging mechanisms are arranged on the periphery of the multi-stage stirring mechanism, and the cement discharging mechanisms are connected with the multi-stage stirring mechanism. According to the continuous stirring production equipment for the phosphogypsum water-stable material, graded stirring and sequential mixing are adopted, and the mixing uniformity of various materials can be improved.

Description

Technical Field

[0001] The utility model relates to continuous stirring production equipment, in particular to continuous stirring production equipment for phosphogypsum water-stable materials. Background Art

[0002] Phosphogypsum powder is used as raw material. By adding a certain proportion of cement powder, external additives and water, and then mixing and stirring, the phosphogypsum water-stabilizing material is produced. It is a road construction material, which has the advantages of high flexural and compressive strength, long setting time, good antifreeze performance, etc. It also has micro-expansion properties, which can effectively control the shrinkage and cracking of the highway water-stabilizing layer in the later stage, and is very popular in the market.

[0003] Traditional phosphogypsum water-stabilizing materials use single-cylinder intermittent mixing equipment to mix phosphogypsum powder, cement powder, external additives and water. The single-cylinder equipment is cumbersome to operate and has low mixing efficiency, and cannot meet the material demand during highway construction. On the other hand, the single-cylinder intermittent mixing equipment mixes phosphogypsum powder, cement powder, external additives and water together. When the four are mixed at the same time, due to the high liquid content, powdery materials such as phosphogypsum powder and cement powder will form mutual wrapping after encountering a large amount of external additives and water. Phosphogypsum powder and cement powder are prone to agglomeration, resulting in uneven mixing of phosphogypsum water-stabilizing materials, affecting the strength of later products. It is necessary to improve it. Summary of the invention

[0004] The purpose of the utility model is to provide a continuous mixing production equipment for phosphogypsum water-stabilizing materials which adopts graded stirring and sequential mixing to facilitate uniform mixing of various materials, improve the strength of phosphogypsum water-stabilizing materials, and thus ensure the quality of highways.

[0005] The technical solution of the utility model is:

[0006] A continuous mixing production equipment for phosphogypsum water-stable material, comprising a batching mechanism, a cement feeding mechanism, a multi-stage mixing mechanism and a finished product feeding mechanism, wherein the multi-stage mixing mechanism is arranged at one end of the batching mechanism, the batching mechanism is connected to the multi-stage mixing mechanism through a belt conveyor, a plurality of cement feeding mechanisms are arranged around the multi-stage mixing mechanism, the cement feeding mechanism is connected to the multi-stage mixing mechanism, and one side of the multi-stage mixing mechanism is connected to the finished product feeding mechanism through a belt conveyor, characterized in that the multi-stage mixing mechanism is composed of a frame, a primary mixer, a secondary mixer, an external additive storage box, a water tank and a quantitative spraying component, the primary mixer and the secondary mixer are installed on the frame in an upper and lower staggered manner, the primary mixer and the secondary mixer are connected, an external additive storage box is installed on the frame below the primary mixer, the external additive storage box is connected to the primary mixer through a quantitative spraying component, a water tank is installed on the frame below the secondary mixer, the water tank is connected to the secondary mixer through a quantitative spraying component, and the primary mixer is connected to each cement feeding mechanism.

[0007] The first-stage mixer comprises a first-stage mixing bin, a first-stage mixing shaft, a feeding channel and a discharging channel. A first-stage mixing shaft is movably installed in the first-stage mixing bin. A plurality of mixing rods are arranged at intervals on the circumference of one end of the first-stage mixing shaft. A plurality of mixing paddles are arranged staggered on the circumference of the first-stage mixing shaft on one side of the mixing rod. A mixing auger is arranged on the circumference of the first-stage mixing shaft on one side of the mixing paddle. A first-stage mixing motor is installed on the frame on one side of the first-stage mixing bin. The transmission shaft of the first-stage mixing motor is fixedly connected to the first-stage mixing shaft.

[0008] The secondary mixer includes a secondary mixing chamber and a secondary mixing shaft. The secondary mixing shaft is movably installed in the secondary mixing chamber. A secondary mixing motor is fixedly installed on a frame on one side of the secondary mixing chamber. The transmission shaft of the secondary mixing motor is fixedly connected to the secondary mixing shaft. A pushing auger is arranged on the circumference of the secondary mixing shaft.

[0009] The quantitative spraying assembly comprises a water pump, a liquid dosimeter and a nozzle. The water pump is connected to the nozzle through a connecting pipe. The nozzle is connected to the stirring bin. A liquid meter and a solenoid valve are respectively arranged on the connecting pipe.

[0010] The batching mechanism includes a batching rack, a hopper, a counterweight conveyor and a feeding auger shaft. The batching rack is equipped with multiple hoppers, and a feeding auger shaft is symmetrically and movably installed in each hopper. The feeding auger shaft is provided with auger blades, and the two auger blades are staggered. An auger motor is installed on the outside of the hopper at one end of one of the feeding auger shafts, and the transmission shaft of the auger motor is fixedly connected to one of the feeding auger shafts. A driving gear and a driven gear are respectively installed on the other ends of the two feeding auger shafts, and the driving gear and the driven gear are meshed and connected. A counterweight conveyor is installed on the batching rack below the discharge port of each hopper, and the counterweight conveyor is connected to the belt conveyor.

[0011] The cement unloading mechanism comprises a tank body and a conveying cylinder. The bottom of the tank body is provided with supporting legs, the lower part of the tank body is provided with a conveying cylinder, a conveying auger is provided in the conveying cylinder through a motor, and one end of the conveying cylinder is connected with a feeding channel of a primary mixer.

[0012] The belt conveyor is composed of a conveying belt, a belt mounting frame, a servo motor and a guide roller. A plurality of guide rollers are movably mounted on the belt mounting frame. A servo motor is mounted on the belt mounting frame at one end of one guide roller. The drive shaft of the servo motor is fixedly connected to the guide roller. A conveying belt is mounted on each guide roller, and the conveying belt is arranged in an inclined state.

[0013] The finished product unloading mechanism comprises a unloading hopper which is in a rectangular funnel shape and has supporting legs fixedly mounted on the bottom of the hopper.

[0014] The beneficial effects of the utility model are:

[0015] The continuous mixing production equipment for phosphogypsum water-stabilizing materials uses the double-feeding auger shaft of the batching mechanism and the staggered arrangement of the two auger blades, which helps to promote the feeding of phosphogypsum powder during its rotation, and further breaks up the phosphogypsum powder to avoid its compaction on the inner wall of the feeding hopper, which affects its complete feeding; through the cooperation of the first-stage mixer and the second-stage mixer, the phosphogypsum powder, cement, external additives and water are mixed in sequence, thereby avoiding the agglomeration phenomenon after mixing together at the same time, resulting in insufficient mixing and affecting the quality of subsequent products; the continuous mixing production equipment for phosphogypsum water-stabilizing materials adopts graded mixing and sequential mixing, which is conducive to improving the mixing uniformity of various materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0018] Figure 3 It is a schematic diagram of the top view of the hopper of the batching mechanism in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the multi-stage stirring mechanism and the belt conveyor in the utility model.

[0020] In the figure: 1. batching mechanism; 2. cement unloading mechanism; 3. multi-stage mixing mechanism; 4. finished product unloading mechanism; 5. batching rack; 6. hopper; 7. counterweight conveyor; 8. unloading auger shaft; 9. belt conveyor; 10. rack; 11. external additive storage box; 12. water tank; 13. feeding channel; 14. unloading channel; 15. primary mixing bin; 16. primary mixing shaft; 17. primary mixing motor; 18. stirring rod; 19. stirring paddle; 20. stirring auger; 21. secondary mixing bin; 22. secondary mixing shaft; 23. pushing auger; 24. nozzle; 25. connecting pipe; 26. tank; 27. conveying cylinder; 28. unloading hopper; 29. ​​supporting leg; 30. auger motor; 31. secondary mixing motor. DETAILED DESCRIPTION

[0021] The continuous mixing production equipment of phosphogypsum water-stabilized material comprises a batching mechanism 1, a cement feeding mechanism 2, a multi-stage mixing mechanism 3 and a finished product feeding mechanism 4. The batching mechanism 1 comprises a batching frame 5, a hopper 6, a counterweight conveyor 7 and a feeding auger shaft 8. Four hoppers 6 are fixedly mounted on the batching frame 5. The taper of each hopper 6 is 66 degrees. A rotary double-axis arch breaker is mounted on the outer side of the lower part of each hopper 6. A timing vibrator is mounted on each hopper 6.

[0022] A filter screen (not marked in the figure) is installed on the top of the hopper 6, and the filter screen is used to filter impurities in the phosphogypsum powder.

[0023] A feeding auger shaft 8 is symmetrically and movably installed in each hopper 6, and each feeding auger shaft 8 is provided with an auger blade. The auger blades on the two feeding auger shafts 8 are staggered. The purpose of such arrangement is to shear and break up the phosphogypsum powder through the auger blades to prevent it from getting damp and compacted on the inner wall of the hopper 6.

[0024] An auger motor 30 is fixedly mounted on the outer side of the hopper 6 at one end of one of the unloading auger shafts 8 through a motor mounting base, and a transmission shaft of the auger motor 30 is fixedly connected to one of the unloading auger shafts 8, and the other ends of the two unloading auger shafts 8 extend to the outside of the hopper 6, and a driving gear and a driven gear are respectively fixedly mounted on the two unloading auger shafts 8 extending to the outside of the hopper 6, and the driving gear and the driven gear are meshed and connected. When in use, one of the unloading auger shafts 8 is driven to rotate by the auger motor 30, and the driving gear and the driven gear are meshed and cooperated, so that the two unloading auger shafts 8 rotate synchronously in opposite directions.

[0025] A discharge port is provided at the bottom end of each hopper 6, and a movable discharge baffle is installed at the discharge port of the hopper 6. By controlling the movement of the discharge baffle, the size of the discharge port is controlled, thereby controlling the discharge amount of the phosphogypsum powder.

[0026] A counterweight conveyor 7 is mounted on the batching rack 5 below the discharge port. The counterweight conveyor 7 is a commercially available product. The counterweight conveyor 7 weighs the phosphogypsum powder and conveys the phosphogypsum powder to the belt conveyor 9 in a quantitative manner.

[0027] A multi-stage stirring mechanism 3 is arranged at one end of the batching mechanism 1, and the batching mechanism 1 is connected to the multi-stage stirring mechanism 3 through a belt conveyor 9. The belt conveyor 9 is composed of a conveying belt, a belt mounting frame, a servo motor and a guide roller. A plurality of guide rollers are movably mounted on the belt mounting frame, a servo motor is fixedly mounted on the belt mounting frame at one end of one guide roller, and the drive shaft of the servo motor is fixedly connected to the guide roller. A conveying belt is mounted on each guide roller, and the conveying belt is arranged in an inclined state. The belt conveyor 9 is used to transport the raw materials of the phosphogypsum water-stabilizing material from one end to the other end.

[0028] The multi-stage stirring mechanism 3 is composed of a frame 10, a primary stirring machine, a secondary stirring machine, an external additive storage box 11, a water tank 12 and a quantitative spraying component. The primary stirring machine and the secondary stirring machine are installed on the frame 10 in an upper and lower staggered manner. The primary stirring machine and the secondary stirring machine are connected. The primary stirring machine includes a primary stirring chamber 15, a primary stirring shaft 16, a feeding channel 13 and a discharging channel 14. The primary stirring chamber 15 is fixedly installed on the frame 10, a feeding channel 13 is provided at one end of the primary stirring chamber 15, and a discharging channel 14 is provided at the other end of the primary stirring chamber 15. A primary stirring shaft 16 is movably installed in the primary stirring chamber 15, and a primary stirring motor 17 is installed on the frame 10 on one side of the primary stirring chamber 15. The transmission shaft of the primary stirring motor 17 is fixedly connected to the primary stirring shaft 16. When in use, the primary stirring shaft 16 is driven to rotate by the transmission shaft of the primary stirring motor 17.

[0029] A plurality of stirring rods 18 are arranged at intervals on the circumference of one end of the primary stirring shaft 16, a plurality of stirring paddles 19 are arranged staggered on the circumference of the primary stirring shaft 16 on one side of the stirring rods 18, and a stirring auger 20 is arranged on the circumference of the primary stirring shaft 16 on one side of the stirring paddle 19. The purpose of such arrangement is: when the primary stirring shaft 16 rotates, the phosphogypsum powder and cement powder are first premixed by the stirring rod 18, and then external additives are added, and the second stage mixing is carried out by using the stirring paddle 19 and the stirring auger 20, and at the same time, the stirring auger 20 squeezes it and puts it into the discharge channel 14.

[0030] The secondary mixer includes a secondary mixing bin 21 and a secondary mixing shaft 22. The secondary mixing bin 21 is fixedly mounted on the frame 10. A feed channel 13 is provided at one end of the secondary mixing bin 21, and a discharge channel 14 is provided at the other end of the secondary mixing bin 21. The feed channel 13 of the secondary mixing bin 21 is connected to the discharge channel 14 of the primary mixing bin 15, and the discharge channel 14 of the secondary mixing bin 21 corresponds to the belt conveyor 9.

[0031] A secondary stirring shaft 22 is movably installed in the secondary stirring bin 21, and a secondary stirring motor 31 is fixedly installed on the frame 10 on one side of the secondary stirring bin 21. The transmission shaft of the secondary stirring motor 31 is fixedly connected to the secondary stirring shaft 22. When in use, the secondary stirring shaft 22 is driven to rotate by the transmission shaft of the secondary stirring motor 31. A pushing auger 23 is arranged on the circumference of the secondary stirring shaft 22. The secondary stirring shaft 22 stirs and pushes the phosphogypsum water-stabilizing material in the secondary stirring bin 21 and transports it to its unloading channel 14.

[0032] An external additive storage box 11 is fixedly installed on the frame 10 below the first-stage mixer, and the external additive storage box 11 is connected to the first-stage mixing chamber 15 of the first-stage mixer through a quantitative spraying component. A water tank 12 is fixedly installed on the frame 10 below the second-stage mixer, and the water tank 12 is connected to the second-stage mixing chamber 21 of the second-stage mixer through a quantitative spraying component.

[0033] The quantitative spraying assembly includes a water pump, a liquid dosimeter, and a nozzle 24. The water pump is connected to the nozzle 24 through a connecting pipe 25. The nozzle 24 is connected to the mixing chamber. A liquid meter and a solenoid valve are respectively provided on the connecting pipe 25. When in use, the liquid meter and the solenoid valve of the quantitative spraying assembly can control the capacity of the liquid sprayed by the nozzle 24. The liquid meter and the solenoid valve are controlled by the programmable controller to operate in sequence and in an orderly manner.

[0034] A plurality of cement feeding mechanisms 2 are arranged around the multi-stage mixing mechanism 3. The cement feeding mechanism 2 is connected to the first-stage mixing bin 15 of the first-stage mixer. The cement feeding mechanism 2 includes a tank body 26 and a conveying cylinder 27. The tank body 26 is used to store cement. A supporting leg 29 is fixedly installed at the bottom of the tank body 26. A conveying cylinder 27 is installed at the lower part of the tank body 26. A conveying auger is movably installed in the conveying cylinder 27 through a motor. One end of the conveying cylinder 27 is connected to the feed channel 13 of the first-stage mixer.

[0035] One side of the multi-stage mixing mechanism 3 is connected to a finished product unloading mechanism 4 through a belt conveyor 9. The finished product unloading mechanism 4 includes a unloading hopper 28. The unloading hopper 28 is in a rectangular funnel shape. Support legs 29 are fixedly installed around the bottom of the unloading hopper 28.

[0036] The cement powder of the continuous mixing production equipment for phosphogypsum water-stabilized materials falls from the cement tank, and the whole moving process of the metering and initial mixing bin is fully enclosed. After the moisture of the mixing material is adjusted with water, the cement has been pre-mixed and wrapped with other water-containing materials, so the cement powder in the phosphogypsum water-stabilized material will not generate dust pollution during the moving process.

[0037] When the continuous mixing production equipment of phosphogypsum water-stabilizing material is used, the phosphogypsum powder is quantitatively conveyed to the conveying belt of the belt conveyor 9 through the batching mechanism 1, and the conveying belt conveys the phosphogypsum powder to the primary mixing bin 15. At the same time, the cement unloading mechanism 2 also quantitatively conveys the cement powder to the primary mixing bin 15. The primary stirring shaft 16 in the primary mixing bin 15 rotates, and the phosphogypsum powder and cement powder are pre-mixed through the stirring rod 18. The quantitative spraying component sprays the external additive liquid in the external additive storage box 11 onto the mixed phosphogypsum powder and cement powder, and performs a second-stage mixing on them under the rotation of the stirring paddle 19 and the stirring auger 20. At the same time, the stirring auger 20 squeezes it and passes through the unloading channel 1 in the primary mixing bin 15. 4 enters the feeding channel 13 in the primary mixing bin 15, and enters the mixed material in the secondary mixing bin 21. The water in the water tank 12 is sprayed on the mixed material through the quantitative spraying component to further dilute it. After being stirred by the pushing auger 23, it is pushed into the discharging channel 14 of the secondary mixing bin 21, and falls onto the second belt conveyor 9 along the discharging channel 14 of the secondary mixing bin 21. Under the transmission of the belt conveyor 9, it is transported to the discharging hopper 28 of the finished product discharging mechanism 4. The discharging hopper 28 is set at a high place, and there is a lane for accommodating vehicles underground. When the conveying vehicle stops below the discharging hopper 28, the phosphogypsum water-stabilizing material in the discharging hopper 28 enters the bucket of the conveying vehicle through the discharging hopper 28, which is convenient for its transportation.

Claims

1. A continuous mixing production device for phosphogypsum water-stable material, comprising a batching mechanism (1), a cement feeding mechanism (2), a multi-stage mixing mechanism (3) and a finished product feeding mechanism (4), wherein the multi-stage mixing mechanism (3) is arranged at one end of the batching mechanism (1), the batching mechanism (1) is connected to the multi-stage mixing mechanism (3) via a belt conveyor (9), a plurality of cement feeding mechanisms (2) are arranged around the multi-stage mixing mechanism (3), the cement feeding mechanism (2) is connected to the multi-stage mixing mechanism (3), and one side of the multi-stage mixing mechanism (3) is connected to the finished product feeding mechanism (4) via a belt conveyor (9), characterized in that: The multi-stage mixing mechanism (3) is composed of a frame (10), a primary mixer, a secondary mixer, an external additive storage box (11), a water tank (12) and a quantitative spraying assembly. The primary mixer and the secondary mixer are installed on the frame (10) in an up-down staggered manner. The primary mixer and the secondary mixer are connected. The external additive storage box (11) is installed on the frame (10) below the primary mixer. The external additive storage box (11) is connected to the primary mixer through the quantitative spraying assembly. The water tank (12) is installed on the frame (10) below the secondary mixer. The water tank (12) is connected to the secondary mixer through the quantitative spraying assembly. The primary mixer is connected to each cement feeding mechanism (2).

2. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The primary stirring machine comprises a primary stirring chamber (15), a primary stirring shaft (16), a feeding channel (13) and a discharging channel (14); a primary stirring shaft (16) is movably mounted in the primary stirring chamber (15); a plurality of stirring rods (18) are arranged at intervals on the circumference of one end of the primary stirring shaft (16); a plurality of stirring paddles (19) are arranged staggered on the circumference of the primary stirring shaft (16) on one side of the stirring rods (18); a stirring auger (20) is arranged on the circumference of the primary stirring shaft (16) on one side of the stirring paddles (19); a primary stirring motor (17) is mounted on a frame (10) on one side of the primary stirring chamber (15); and a transmission shaft of the primary stirring motor (17) is fixedly connected to the primary stirring shaft (16).

3. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The secondary mixer comprises a secondary mixing chamber (21) and a secondary mixing shaft (22), wherein the secondary mixing chamber (21) is movably provided with the secondary mixing shaft (22), a secondary mixing motor (31) is fixedly provided on a frame (10) at one side of the secondary mixing chamber (21), a transmission shaft of the secondary mixing motor (31) is fixedly connected to the secondary mixing shaft (22), and a pushing auger (23) is provided on the circumference of the secondary mixing shaft (22).

4. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The quantitative spraying assembly comprises a water pump, a liquid dosimeter, and a nozzle (24); the water pump is connected to the nozzle (24) via a connecting pipe (25); the nozzle (24) is connected to the stirring chamber; and a liquid meter and a solenoid valve are respectively provided on the connecting pipe (25).

5. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The batching mechanism (1) comprises a batching frame (5), a hopper (6), a counterweight conveyor (7) and a feeding auger shaft (8). The batching frame (5) is provided with a plurality of hoppers (6). A feeding auger shaft (8) is symmetrically and movably installed in each hopper (6). An auger blade is arranged on the feeding auger shaft (8). The two auger blades are staggered. An auger motor (30) is arranged outside the hopper (6) at one end of one of the feeding auger shafts (8). The transmission shaft of the auger motor (30) is fixedly connected to one of the feeding auger shafts (8). A driving gear and a driven gear are respectively arranged on the other ends of the two feeding auger shafts (8). The driving gear and the driven gear are meshed and connected. A counterweight conveyor (7) is arranged on the batching frame (5) below the discharge port of each hopper (6). The counterweight conveyor (7) is connected to a belt conveyor (9).

6. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The cement unloading mechanism (2) comprises a tank body (26) and a conveying cylinder (27). The bottom of the tank body (26) is provided with a supporting leg (29). The lower part of the tank body (26) is provided with a conveying cylinder (27). A conveying auger is provided in the conveying cylinder (27) via a motor. One end of the conveying cylinder (27) is connected to a feed channel (13) of a primary mixer.

7. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The belt conveyor (9) is composed of a conveying belt, a belt mounting frame, a servo motor and a guide roller. A plurality of guide rollers are movably mounted on the belt mounting frame. A servo motor is mounted on the belt mounting frame at one end of one of the guide rollers. The drive shaft of the servo motor is fixedly connected to the guide roller. A conveying belt is sleeved on each guide roller. The conveying belt is arranged in an inclined state.

8. The continuous stirring production equipment for phosphogypsum water-stable material according to claim 1, characterized in that: The finished product unloading mechanism (4) comprises a unloading hopper (28), which is in the shape of a rectangular funnel, and support legs (29) are fixedly mounted on the bottom of the unloading hopper (28).

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