Grinding equipment and process for polycarboxylic acid high-performance water-reducing agent powder

Abstract

The application relates to the technical field of water-reducing agent processing, and discloses a grinding device and process for polycarboxylic high-performance water-reducing agent powder, wherein the device comprises a tank body and a hopper; the upper end of the tank body is provided with an opening, and a cover plate is arranged at the opening; the upper end of the cover plate is fixedly connected with the lower end of the hopper through a support; the lower end of the cover plate is fixedly connected with a circular ring; the lower end of the circular ring is fixedly connected with an annular track; a grinding mechanism is arranged in the annular track; the grinding mechanism performs fine grinding treatment on the water-reducing agent powder through centrifugal force generated in the annular track; and the annular track comprises a first annular groove and a second annular groove. The grinding device and process for polycarboxylic high-performance water-reducing agent powder can continuously grind the water-reducing agent, and the water-reducing agent powder is conveyed through airflow during the grinding process, so that the water-reducing agent powder can be prevented from being accumulated and blocked in the grinding channel, and the airflow can also be used to take away the temperature generated during the grinding process, so that the grinding device can continuously work for a long time.

Description

Technical Field

[0001] This invention relates to the field of water-reducing agent processing technology, specifically to a grinding equipment and process for polycarboxylate high-performance water-reducing agent powder. Background Technology

[0002] Polycarboxylate superplasticizers, due to their advantages such as low dosage, high water reduction rate, good slump retention, strong molecular structure adjustability, and environmental friendliness, have become the most important product in the current concrete admixture market. Polycarboxylate superplasticizers are comb-shaped, water-soluble polymers composed of a main chain rich in carboxylic acid groups and polyoxyalkylene side chains. The carboxylic acid groups on the polycarboxylate main chain can be directionally adsorbed onto the surface of positively charged cement or cement hydrates, while the polyoxyalkylene side chains extend in solution to form a hydration layer, providing steric repulsion to prevent cement agglomeration. Therefore, it imparts good fluidity to the cement paste.

[0003] Currently, most widely used polycarboxylate superplasticizers are 10-50% concentration solutions. Due to the remoteness of some construction sites, especially for overseas projects in many countries, the low solid content significantly increases costs related to logistics, customs clearance, and storage. Furthermore, the widespread application of dry-mix mortar has created an urgent need for the production and application of solid powder polycarboxylate superplasticizers. Currently, most powdered polycarboxylate superplasticizers on the market are obtained through spray drying. However, because polycarboxylate superplasticizers have a relatively small molecular weight, their solid form softens easily above 80°C. If conventional drying methods such as spray drying are used, which involve heating water and material simultaneously, appropriate special additives must be added to achieve the desired solid polycarboxylate superplasticizer. Therefore, low-temperature drying can solve these problems. Low-temperature drying yields agglomerated solid polycarboxylate superplasticizer, which can then be ground using improved grinding equipment to obtain solid polycarboxylate superplasticizer powder, facilitating packaging, transportation, and subsequent dilution with water.

[0004] Currently, when using traditional grinding equipment, the friction generated during the grinding process generates a lot of heat. Since polycarboxylate superplasticizers have a very low softening point, solid polycarboxylate superplasticizers are very easy to soften and clump together. This often leads to the grinding equipment being easily blocked by the clumps of solid polycarboxylate superplasticizers, making it impossible for the grinding equipment to work normally or continuously grind the superplasticizer. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a grinding device and process for polycarboxylate high-performance water-reducing agent powder. This solves the problem that the grinding device generates high heat during the grinding process, which easily leads to the softening and clumping of solid polycarboxylate water-reducing agent. The grinding device is easily blocked by the clumped water-reducing agent, making it unable to work normally or continuously grind the water-reducing agent.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for polycarboxylate high-performance water-reducing agent powder, comprising a tank and a hopper, wherein the upper end of the tank is provided with an opening and a cover plate is installed at the opening, the upper end of the cover plate is fixedly connected to the lower end of the hopper via a bracket, a ring is fixedly connected to the lower end of the cover plate, and an annular track is fixedly connected to the lower end of the ring, wherein a grinding mechanism is provided inside the annular track, and the grinding mechanism performs fine grinding of the water-reducing agent powder by means of centrifugal force generated inside the annular track;

[0009] The annular track includes a first annular groove and a second annular groove, which are connected by bolts. A grinding plate is fixedly connected to the inner side of the second annular groove.

[0010] The upper end of the cover plate is fixedly connected to a sleeve, and a feed pipe is rotatably connected inside the sleeve through a sealed bearing. The upper end of the feed pipe extends into the hopper, and the lower end of the feed pipe extends into the annular track and is equipped with a feeding mechanism. The feeding mechanism conveys water-reducing agent particles to the grinding mechanism through both airflow and mechanical agitation, and can perform coarse grinding of large water-reducing agent particles.

[0011] An air outlet pipe is fixedly connected to one side of the tank body, a filter mechanism is installed at the lower end of the cover plate, a discharge pipe and multiple support legs are fixedly connected to the lower end of the tank body, and a raw material pipe is fixedly connected to one side of the hopper.

[0012] Preferably, the grinding mechanism includes multiple spheres, each of which is fixedly connected to a rectangular tube on one side. A conical hole is opened through one side of each sphere, and the conical hole communicates with the rectangular tube. A box is fixedly connected to the wall of the feed tube. A first circular plate and a second circular plate are fixedly connected to the side wall of the box. Multiple rectangular plates are fixedly connected between the first circular plate and the second circular plate. The multiple rectangular plates are arranged in pairs on the wall of the rectangular tube. A rectangular through hole is opened on the side wall of the box. Multiple evenly distributed material passages are opened at the lower end of the box. Multiple scrapers are arranged in the annular track, and the multiple scrapers are fixed between the first circular plate and the second circular plate.

[0013] The inner side of the annular track is provided with an annular opening, and the edges of the first and second circular plates are inserted into the annular opening. The outer sides of the first and second annular grooves are provided with folded edges, and inclined grooves are opened at both folded edges. The two inclined grooves together form a discharge hole.

[0014] Preferably, a first grinding part is provided on the inner side of the annular track, and a second grinding part that cooperates with the first grinding part is provided on one side of the sphere. A plurality of material feeding grooves are provided on one side of the second grinding part, and the plurality of material feeding grooves are all connected to the conical hole. A plurality of material discharge grooves are provided on the side wall of the sphere.

[0015] Preferably, the lower end of the second circular plate is provided with a plurality of rectangular grooves, which are arranged in a ring. A plurality of evenly distributed oblique holes are provided through one side of the rectangular groove and the upper end of the second circular plate. The lower end of the rectangular tube is provided with a strip-shaped through hole. One side of the rectangular groove is connected to the edge of the second circular plate.

[0016] Preferably, a fixing ring is fixedly connected to the wall of the feed pipe. The fixing ring is located inside the box and is fixedly connected to multiple guide grooves. Two blades are symmetrically fixedly connected to the side wall of the guide groove. The lower ends of the two blades and the guide groove are in contact with the lower inner wall of the box.

[0017] Preferably, a first pulley is fixedly connected to the wall of the feed pipe, a motor is fixedly connected to the upper end of the cover plate, a second pulley is fixedly connected to the output end of the motor, multiple belts are wound around the first pulley and the second pulley, a feed nozzle is fixedly connected to the upper end of the feed pipe, multiple evenly distributed spiral holes are opened on the side wall of the feed nozzle, and multiple crushing blades are fixedly connected to the wall of the feed pipe, all of which are Y-shaped structures.

[0018] Preferably, the feeding mechanism includes a housing, which is fixed to the lower end of the grinding plate by bolts. An inner shell is provided inside the housing. The upper end of the inner shell is coaxially fixed to the lower end of the feed pipe. A grinding port is provided at the lower end of the inner shell. A plurality of first spiral blades are fixedly connected to the side wall of the inner shell. A plurality of second spiral blades are provided between each two adjacent first spiral blades. The plurality of second spiral blades are all fixed to the side wall of the inner shell.

[0019] A grinding body is movably disposed within the inner shell. A third grinding section is provided at the lower end of the grinding body. The diameter of the third grinding section is smaller than the diameter of the grinding opening. The grinding opening and the third grinding section together form a grinding channel. Multiple air inlet pipes are fixedly connected to the side wall of the outer shell at an incline. One end of each of the multiple air inlet pipes penetrates the side wall of the tank. Multiple arc-shaped baffles are fixedly connected to the side wall of the inner shell. Each of the multiple arc-shaped baffles contacts the lower inner wall of the outer shell.

[0020] Preferably, the sidewall of the grinding body has multiple notches, which create multiple evenly distributed protrusions on the sidewall. A rectangular rod is fixedly connected to the lower inner wall of the outer shell. The center of the grinding body is connected to the wall of the rectangular rod through a rectangular hole. A bracket is fixedly connected to the upper end of the rectangular rod, and multiple springs are fixedly connected to the lower end of the bracket. Multiple blind holes are opened at the upper end of the grinding body, and the multiple springs are respectively fitted into the multiple blind holes. Multiple first strong magnets are fixedly connected to the lower end of the outer shell, and multiple second strong magnets are fixedly connected to the lower end of the grinding body. The magnetic poles of the first strong magnets and the second strong magnets are the same at opposite ends.

[0021] Preferably, the filtration mechanism includes a baffle ring, the upper end of which is fixed to the lower end of the cover plate. The lower end of the baffle ring is provided with a connecting part, which is engaged with the inner wall of the tank. The side wall of the baffle ring has multiple evenly distributed exhaust channels. An annular frame is fitted inside the baffle ring, and an annular filter element is fixedly connected inside the annular frame. Two connecting blocks are fixedly connected to the upper end of the annular frame. Two electric push rods are fixedly connected to the upper end of the cover plate. The output ends of the two electric push rods extend into the tank and are fixedly connected to one side of the connecting blocks. A dust-suppressing plate is fixedly connected inside the tank. The side wall of the dust-suppressing plate has multiple arc-shaped openings, and multiple arc-shaped strips are fixedly connected to the upper end of the dust-suppressing plate.

[0022] The present invention also provides a grinding process for polycarboxylate superplasticizer powder, comprising the following steps;

[0023] Step 1: First, start the grinding equipment. After the equipment is running, transport the agglomerated water-reducing agent to the hopper through the raw material pipe.

[0024] Step 2: Connect the air source and deliver compressed gas from the air inlet pipe to the feeding mechanism. The water-reducing agent enters the feeding mechanism through the spiral hole from the feed pipe. The feeding mechanism delivers and coarsely grinds the water-reducing agent by means of airflow and mechanical agitation.

[0025] Step 3: The water-reducing agent is further carried by the airflow into the annular track. The water-reducing agent powder is finely ground by the centrifugal force generated by the grinding mechanism in the annular track, and the ground water-reducing agent is discharged into the tank at an angle with the airflow.

[0026] Step 4: Start the electric push rod to make the filter mechanism work. When the filter mechanism is working, it efficiently intercepts the ground water-reducing agent powder by switching the working surface of the annular filter element.

[0027] Step 5: After grinding is completed, stop conveying the water-reducing agent particles and increase the compressed gas supply to carry away the residual powder in the equipment.

[0028] (III) Beneficial Effects

[0029] Compared with the prior art, the present invention provides a grinding device and process for polycarboxylate high-performance water-reducing agent powder, which has the following beneficial effects:

[0030] 1. In use, the invention starts by starting the motor to drive the second pulley to rotate. The rotation of the second pulley drives the belt to rotate the first pulley. When the first pulley rotates, it drives the feed pipe to stir and crush the water-reducing agent particles in the hopper. The rotation of the feed pipe drives the feeding mechanism to rotate. At this time, the water-reducing agent can be transported by mechanical stirring and airflow. After the water-reducing agent enters the grinding mechanism with the airflow, it is ground again on the grinding surface by the balls in the grinding mechanism. After grinding, it is discharged from the inclined groove into the tank in time, thus realizing continuous grinding of the water-reducing agent. During the grinding process, the water-reducing agent powder is transported by airflow, which can not only avoid the accumulation and blockage of the grinding channel, but also use the airflow to remove the temperature generated during the grinding process, so that the grinding equipment can work continuously for a long time.

[0031] 2. In the grinding mechanism of this invention, during use, the feed pipe rotates, causing the box body to rotate, which in turn causes the first and second circular plates to rotate. When the first and second circular plates rotate, they drive the rectangular tube to rotate the sphere. When the sphere rotates, it generates centrifugal force, causing the second grinding part to contact the first grinding part. At this time, the airflow carries the water-reducing agent into the box body through the material passage, and then enters the rectangular tube through the rectangular through hole on the box body. Under the action of the airflow and centrifugal force, the water-reducing agent in the rectangular tube passes through the conical hole and enters the material trough. At this time, the water-reducing agent particles enter between the first and second grinding parts. After grinding, the water-reducing agent powder is discharged obliquely from the discharge hole with the airflow and blown towards the annular filter element, forming a vortex on the surface of the annular filter element, making it difficult for the water-reducing agent powder to accumulate on its filter surface. In this way, efficient grinding can be achieved, and the water-reducing agent is not easy to accumulate under the action of the airflow, which can also remove the temperature generated on the grinding surface.

[0032] 3. The feeding mechanism provided in this invention, when in use, the feeding pipe rotates, driving the grinding body to rotate in the inner shell. The protrusions can coarsely grind the water-reducing agent. The coarsely ground water-reducing agent enters the grinding channel between the grinding port and the third grinding part. The grinding channel with a fixed gap allows the water-reducing agent to be further ground. When the grinding body rotates, the multiple second strong magnets installed at its bottom alternately pass through the multiple first strong magnets. The mutual repulsion force generated when the magnetic poles are the same can push the grinding body to compress the spring and produce reciprocating motion. During the movement, the gap between the grinding block and the inner shell also changes alternately to form a variable gap grinding space. In this way, the water-reducing agent can be fed smoothly and can also be crushed. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the structure of a grinding device for polycarboxylate superplasticizer powder proposed in this invention;

[0034] Figure 2 In the grinding equipment for polycarboxylate superplasticizer powder proposed in this invention Figure 1 A sectional view;

[0035] Figure 3 This is a schematic diagram of the grinding mechanism and feeding mechanism in a grinding device for polycarboxylate superplasticizer powder proposed in this invention;

[0036] Figure 4 This is a schematic diagram of the structure of the first circular plate, the second circular plate, the scraper, and the box body in a grinding device for polycarboxylate superplasticizer powder proposed in this invention.

[0037] Figure 5 This is a schematic diagram of the structure of the first and second circular plates in a grinding device for polycarboxylate superplasticizer powder proposed in this invention;

[0038] Figure 6 This is a schematic diagram of the rectangular tube and sphere in a grinding device for polycarboxylate superplasticizer powder proposed in this invention;

[0039] Figure 7 This is a schematic diagram of the feeding mechanism in a grinding device for polycarboxylate superplasticizer powder according to the present invention;

[0040] Figure 8 This is a schematic diagram of the outer shell, inner shell, and first strong magnet in a grinding device for polycarboxylate superplasticizer powder proposed in this invention.

[0041] Figure 9 This is a schematic diagram of the inner shell and grinding body in a grinding device for polycarboxylate superplasticizer powder proposed in this invention;

[0042] Figure 10 This is a schematic diagram of the grinding body, spring, and second strong magnet in a grinding device for polycarboxylate superplasticizer powder proposed in this invention.

[0043] Figure 11 This is a schematic diagram of the filtration mechanism in a grinding device for polycarboxylate superplasticizer powder proposed in this invention.

[0044] In the diagram: 1. Tank body; 2. Cover plate; 3. Vent pipe; 4. Electric push rod; 5. Hopper; 6. Motor; 7. Belt; 8. First pulley; 9. Discharge pipe; 10. First annular groove; 11. Second annular groove; 12. Dust-collecting plate; 13. First circular plate; 14. Sleeve; 15. Circular ring; 16. Second pulley; 17. Rectangular through hole; 18. Scraper; 19. Sphere; 20. Box body; 21. Outer shell; 22. First spiral blade; 23. Rectangular tube; 24. Second circular plate; 25. Grinding plate; 26. First grinding section; 27. Second spiral blade; 28. Inclined groove; 29. ​​Rectangular groove; 30. Strip-shaped through hole; 31. Inclined hole; 32. Rectangular plate; 33. Conical hole; 34. Discharge chute; 35. Second grinding section; 36. Crushing blade; 37. Guide chute; 38. Inner shell; 39. Grinding body; 40. First strong magnet; 41. Arc-shaped baffle; 42. Feed pipe; 43. Feed nozzle; 44. Grinding port; 45. Third grinding section; 46. Spring; 47. Annular filter element; 48. Annular frame; 49. Windproof ring; 50. Second strong magnet. Detailed Implementation

[0045] 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.

[0046] Example 1: Refer to Appendix Figure 1-11 A grinding device for polycarboxylate high-performance water-reducing agent powder includes a tank 1 and a hopper 5. The upper end of the tank 1 is provided with an opening, and a cover plate 2 is installed at the opening. The upper end of the cover plate 2 is fixedly connected to the lower end of the hopper 5 through a bracket. A ring 15 is fixedly connected to the lower end of the cover plate 2, and an annular track is fixedly connected to the lower end of the ring 15. A grinding mechanism is provided in the annular track. The grinding mechanism performs fine grinding of the water-reducing agent powder by the centrifugal force generated in the annular track.

[0047] The annular track includes a first annular groove 10 and a second annular groove 11, which are connected by bolts. A grinding plate 25 is fixedly connected to the inner side of the second annular groove 11.

[0048] The upper end of the cover plate 2 is fixedly connected to the sleeve 14. The sleeve 14 is rotatably connected to the feed pipe 42 through the sealed bearing. The upper end of the feed pipe 42 extends into the hopper 5, and the lower end of the feed pipe 42 extends into the annular track and is equipped with a feeding mechanism. The feeding mechanism conveys water-reducing agent particles to the grinding mechanism through airflow and mechanical agitation, and can coarsely grind large water-reducing agent particles.

[0049] An exhaust pipe 3 is fixedly connected to one side of the tank body 1. A filter mechanism is installed at the lower end of the cover plate 2. The filter mechanism includes a baffle ring 49, the upper end of which is fixed to the lower end of the cover plate 2. A connecting part is provided at the lower end of the baffle ring 49, which engages with the inner wall of the tank body 1. Multiple evenly distributed exhaust channels are provided on the side wall of the baffle ring 49. An annular frame 48 is fitted inside the baffle ring 49. An annular filter element 47 is fixedly connected inside the annular frame 48. Two connecting blocks are fixedly connected to the upper end of the annular frame 48. Two electric push rods 4 are fixedly connected to the upper end of the cover plate 2. The output ends of the two electric push rods 4 extend into the tank body 1 and are fixedly connected to one side of the connecting blocks. A dust settling plate 12 is fixedly connected inside the tank body 1. The dust-suppressing plate 12 has multiple arc-shaped openings on its side wall. Multiple arc-shaped strips are fixedly connected to the upper end of the dust-suppressing plate 12. The lower end of the tank body 1 is fixedly connected to the discharge pipe 9 and multiple support legs. The side of the hopper 5 is fixedly connected to the raw material pipe. The first pulley 8 is fixedly connected to the wall of the feed pipe 42. The upper end of the cover plate 2 is fixedly connected to the motor 6. The output end of the motor 6 is fixedly connected to the second pulley 16. Multiple belts 7 are wound together between the first pulley 8 and the second pulley 16. The upper end of the feed pipe 42 is fixedly connected to the feed nozzle 43. Multiple evenly distributed spiral holes are opened on the side wall of the feed nozzle 43. Multiple crushing blades 36 are fixedly connected to the wall of the feed pipe 42. All of the multiple crushing blades 36 are Y-shaped structures.

[0050] The grinding process of polycarboxylate superplasticizer powder is as follows:

[0051] First, start the grinding equipment. After the equipment is running, the agglomerated water-reducing agent is transported to hopper 5 through the raw material pipe. When the amount of water-reducing agent in hopper 5 increases, it accumulates below hopper 5, blocking the feed inlet 43 to prevent excessive gas from the feeding mechanism below from flowing into hopper 5 and affecting the discharge of the grinding mechanism. Connect the air source and supply compressed gas to the feeding mechanism from the air inlet pipe. When the feed pipe 42 rotates, the spiral hole and the crushing blade 36 can both cut the water-reducing agent particles, thus crushing the agglomerated water-reducing agent. The crushed water-reducing agent passes through the spiral hole under the action of gravity and enters the feeding mechanism through the feed pipe 42. At this time, the position of the water-reducing agent is lower than the feed inlet of the grinding mechanism. At this time, under the action of airflow and mechanical agitation in the feeding mechanism, the water-reducing agent can be transported in time and coarsely ground. The water-reducing agent further enters the annular track with the airflow and is directly discharged towards On the grinding surface within the annular track, the ground water-reducing agent powder is discharged at an angle from the discharge hole with the airflow, and gas-solid separation is achieved by the interception of the annular filter element 47. This allows the water-reducing agent powder to be finely ground by the centrifugal force generated by the grinding mechanism within the annular track. The ground water-reducing agent is then discharged at an angle into the tank 1 with the airflow. When the annular filter element 47 intercepts the water-reducing agent powder, the working surface of the filter element is prone to accumulating the powder. At this time, the electric push rod 4 can be activated to displace the filter mechanism. When the filter mechanism is displaced, the position of the working surface of the annular filter element 47 can be adjusted so that no airflow passes through the area where the water-reducing agent powder is accumulated. This allows the accumulated water-reducing agent powder to fall off automatically, thus achieving efficient interception of the ground water-reducing agent powder. After grinding is completed, the conveying of water-reducing agent particles is stopped, and the compressed gas conveying volume is increased to use the airflow to carry away the powder remaining in the equipment.

[0052] In use, the invention starts by starting the motor 6 to drive the second pulley 16 to rotate. The rotation of the second pulley 16 drives the belt 7 to rotate the first pulley 8. When the first pulley 8 rotates, it drives the feed pipe 42 to stir and crush the water-reducing agent particles in the hopper 5 through the feed nozzle 43 and the crushing blade 36. When the feed pipe 42 rotates, it drives the feeding mechanism to rotate. At this time, the water-reducing agent can be transported by mechanical stirring in combination with airflow. After the water-reducing agent enters the grinding mechanism with the airflow, it is directly ground again on the grinding surface by the balls 19 in the grinding mechanism. After grinding, it is discharged from the inclined groove 28 into the tank 1 in time, thereby realizing continuous grinding of the water-reducing agent. During the grinding process, the water-reducing agent powder is transported by airflow, which can not only avoid accumulation and blockage of the grinding channel, but also use airflow to remove the temperature generated during the grinding process, so that the grinding equipment can work continuously for a long time.

[0053] Example 2: The difference from Example 1 is that;

[0054] See attached document Figure 2-6The grinding mechanism includes multiple balls 19, each ball 19 having a rectangular tube 23 fixedly connected to one side. A conical hole 33 is opened through one side of each ball 19, and the conical hole 33 communicates with the rectangular tube 23. A box 20 is fixedly connected to the wall of the feed pipe 42. A first circular plate 13 and a second circular plate 24 are fixedly connected to the side wall of the box 20. Multiple rectangular plates 32 are fixedly connected between the first circular plate 13 and the second circular plate 24. The multiple rectangular plates 32 are arranged in pairs on the wall of the rectangular tube 23. A rectangular through hole 17 is opened on the side wall of the box 20. Multiple evenly distributed material passages are opened at the lower end of the box 20. Multiple scrapers 18 are arranged in the annular track, and the multiple scrapers 18 are fixed between the first circular plate 13 and the second circular plate 24.

[0055] An annular opening is provided on the inner side of the annular track. The edges of the first circular plate 13 and the second circular plate 24 are inserted into the annular opening. Folded edges are provided on the outer sides of the first annular groove 10 and the second annular groove 11. Inclined grooves 28 are provided on both folded edges, and the two inclined grooves 28 together form a discharge hole. A first grinding part 26 is provided on the inner side of the annular track. A second grinding part 35 that cooperates with the first grinding part 26 is provided on one side of the sphere 19. Multiple material feeding grooves are provided on one side of the second grinding part 35. The multiple material feeding grooves are all connected to the conical hole 33. Multiple discharge grooves 34 are provided on the side wall of the sphere 19. The second circular plate The lower end of the 24 is provided with multiple rectangular grooves 29, which are arranged in a ring. Multiple evenly distributed oblique holes 31 are provided through one side of the rectangular groove 29 and the upper end of the second circular plate 24. The lower end of the rectangular tube 23 is provided with a strip-shaped through hole 30. One side of the rectangular groove 29 is connected to the edge of the second circular plate 24. A fixing ring is fixedly connected to the wall of the feed pipe 42. The fixing ring is located inside the box body 20 and is fixedly connected to multiple guide grooves 37. Two blades are symmetrically fixedly connected to the side wall of the guide groove 37. The two blades and the lower end of the guide groove 37 are in contact with the lower inner wall of the box body 20.

[0056] In the grinding mechanism of this invention, during use, the feed pipe 42 rotates, causing the box body 20 to rotate, which in turn causes the first circular plate 13 and the second circular plate 24 to rotate. When the first circular plate 13 and the second circular plate 24 rotate, they cause the rectangular tube 23 to rotate, which in turn causes the ball 19 to rotate. When the ball 19 rotates, it generates centrifugal force, which causes the second grinding part 35 to come into contact with the first grinding part 26. At this time, the airflow carrying the water-reducing agent enters the box body 20 from the material passage, and then enters the rectangular tube 23 through the rectangular through hole 17 on the box body 20. Under the action of the airflow and centrifugal force, the water-reducing agent in the rectangular tube 23 passes through the conical hole 33 and enters the material trough. At this time, the water-reducing agent particles enter between the first grinding part 26 and the second grinding part 35. After grinding, the water-reducing agent powder is discharged obliquely from the discharge hole with the airflow and blown toward the annular filter element 47, forming a vortex on the surface of the annular filter element 47, making it difficult for the water-reducing agent powder to accumulate on its filter surface. In this way, efficient grinding can be achieved, and the water-reducing agent is not easy to accumulate under the action of the airflow, which can also remove the temperature generated on the grinding surface.

[0057] Example 3: The difference from Example 1 is that;

[0058] See attached document Figure 7-10 The feeding mechanism includes an outer shell 21, which is fixed to the lower end of the grinding plate 25 by bolts. An inner shell 38 is provided inside the outer shell 21. The upper end of the inner shell 38 is coaxially fixed to the lower end of the feed pipe 42. A grinding port 44 is provided at the lower end of the inner shell 38. Multiple first spiral blades 22 are fixedly connected to the side wall of the inner shell 38. Multiple second spiral blades 27 are provided between two adjacent first spiral blades 22. The multiple second spiral blades 27 are all fixed to the side wall of the inner shell 38.

[0059] A grinding body 39 is movably disposed within the inner shell 38. A third grinding section 45 is formed at the lower end of the grinding body 39. The diameter of the third grinding section 45 is smaller than the diameter of the grinding opening 44. The grinding opening 44 and the third grinding section 45 together form a grinding channel. Multiple air inlet pipes are fixedly connected to the side wall of the outer shell 21 at an angle. One end of each air inlet pipe penetrates the side wall of the tank 1. Multiple arc-shaped baffles 41 are fixedly connected to the side wall of the inner shell 38. Each arc-shaped baffle 41 contacts the lower inner wall of the outer shell 21. Multiple notches are formed on the side wall of the grinding body 39. These notches allow the side wall of the grinding body 39 to... Multiple evenly distributed protrusions are formed. A rectangular rod is fixedly connected to the lower inner wall of the outer shell 21. The center of the grinding body 39 is sleeved with the wall of the rectangular rod through a rectangular hole. A bracket is fixedly connected to the upper end of the rectangular rod. Multiple springs 46 are fixedly connected to the lower end of the bracket. Multiple blind holes are opened at the upper end of the grinding body 39. Multiple springs 46 are respectively sleeved in multiple blind holes. Multiple first strong magnets 40 are fixedly connected to the lower end of the outer shell 21. Multiple second strong magnets 50 are fixedly connected to the lower end of the grinding body 39. The magnetic poles of the opposite ends of the first strong magnets 40 and the second strong magnets 50 are the same.

[0060] In this invention, the feeding mechanism rotates the feeding pipe 42, causing the grinding body 39 to rotate within the inner shell 38. The protrusions coarsely grind the water-reducing agent. The coarsely ground water-reducing agent enters the grinding channel between the grinding port 44 and the third grinding section 45. The grinding channel with a fixed gap further grinds the water-reducing agent. As the grinding body 39 rotates, multiple second strong magnets 50 installed at its bottom alternately pass through multiple first strong magnets 40. The repulsive force generated when the magnetic poles are the same can push the grinding body 39 to compress the spring 46 and produce reciprocating motion. During the movement, the gap between the grinding block and the inner shell 38 also changes alternately, forming a variable gap grinding space. This ensures that the water-reducing agent can be fed smoothly and can also crush the water-reducing agent. Finally, the water-reducing agent falling into the outer shell 21 is further agitated by the first spiral blade 22 and the second spiral blade 27 and mixed with the airflow in the air inlet pipe. After mixing, it passes through the material passage and the box 20 into the grinding mechanism.

[0061] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding device for polycarboxylate high-performance water-reducing agent powder, comprising a tank (1) and a hopper (5), characterized in that: The upper end of the tank (1) is provided with an opening, and a cover plate (2) is installed at the opening. The upper end of the cover plate (2) is fixedly connected to the lower end of the hopper (5) through a bracket. A sleeve (14) is fixedly connected to the upper end of the cover plate (2). A feed pipe (42) is rotatably connected to the sleeve (14) through a sealed bearing. The upper end of the feed pipe (42) extends into the hopper (5). A ring (15) is fixedly connected to the lower end of the cover plate (2). A ring track is fixedly connected to the lower end of the ring (15). A grinding mechanism is provided in the ring track. The grinding mechanism includes multiple balls (19). A rectangular tube (23) is fixedly connected to one side of each ball (19). A conical hole is opened through one side of each ball (19). 33), the conical hole (33) is connected to the rectangular tube (23), a box body (20) is fixedly connected to the wall of the feed pipe (42), a first circular plate (13) and a second circular plate (24) are fixedly connected to the side wall of the box body (20), a plurality of rectangular plates (32) are fixedly connected between the first circular plate (13) and the second circular plate (24), the plurality of rectangular plates (32) are arranged in pairs on the wall of the rectangular tube (23), a rectangular through hole (17) is opened on the side wall of the box body (20), a plurality of evenly distributed material passages are opened at the lower end of the box body (20), a plurality of scrapers (18) are arranged in the annular track, and the plurality of scrapers (18) are all fixed between the first circular plate (13) and the second circular plate (24). The annular track includes a first annular groove (10) and a second annular groove (11), which are connected by bolts. A grinding plate (25) is fixedly connected to the inner side of the second annular groove (11). The inner side of the annular track is provided with an annular opening, and the edges of the first circular plate (13) and the second circular plate (24) are inserted into the annular opening. The outer sides of the first annular groove (10) and the second annular groove (11) are provided with folded edges, and inclined grooves (28) are opened at both folded edges. The two inclined grooves (28) together form a discharge hole. The grinding mechanism performs fine grinding of the water-reducing agent powder by the centrifugal force generated in the annular track. The lower end of the feed pipe (42) extends into the annular track and is equipped with a feeding mechanism. The feeding mechanism includes a housing (21), which is fixed to the lower end of the grinding plate (25) by bolts. An inner shell (38) is provided inside the housing (21). The upper end of the inner shell (38) is coaxially fixed at the lower end of the feed pipe (42). A grinding port (44) is opened at the lower end of the inner shell (38). A plurality of first spiral blades (22) are fixedly connected to the side wall of the inner shell (38). A plurality of second spiral blades (27) are provided between two adjacent first spiral blades (22). The plurality of second spiral blades (27) are fixed on the side wall of the inner shell (38). The inner shell (38) is provided with a grinding body (39), and a third grinding part (45) is provided at the lower end of the grinding body (39). The diameter of the third grinding part (45) is smaller than the diameter of the grinding port (44). The grinding port (44) and the third grinding part (45) together form a grinding channel. The side wall of the outer shell (21) is fixedly connected with multiple air inlet pipes. One end of each of the multiple air inlet pipes penetrates the side wall of the tank (1). The side wall of the inner shell (38) is fixedly connected with multiple arc-shaped baffles (41). Each of the multiple arc-shaped baffles (41) contacts the lower inner wall of the outer shell (21). The feeding mechanism conveys water-reducing agent particles to the grinding mechanism through airflow and mechanical agitation, and can coarsely grind large water-reducing agent particles. A gas outlet pipe (3) is fixedly connected to one side of the tank (1), a filter mechanism is installed at the lower end of the cover plate (2), a discharge pipe (9) and multiple support legs are fixedly connected to the lower end of the tank (1), and a raw material pipe is fixedly connected to one side of the hopper (5).

2. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 1, characterized in that: The inner side of the annular track is provided with a first grinding part (26), and the side of the sphere (19) is provided with a second grinding part (35) that cooperates with the first grinding part (26). The side of the second grinding part (35) is provided with a plurality of material feeding grooves, and the plurality of material feeding grooves are connected to the conical hole (33). The side wall of the sphere (19) is provided with a plurality of material discharge grooves (34).

3. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 2, characterized in that: The lower end of the second circular plate (24) is provided with a plurality of rectangular grooves (29), which are arranged in a ring. A plurality of evenly distributed oblique holes (31) are provided through one side of the rectangular groove (29) and the upper end of the second circular plate (24). The lower end of the rectangular tube (23) is provided with a strip-shaped through hole (30). One side of the rectangular groove (29) is connected to the edge of the second circular plate (24).

4. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 3, characterized in that: A fixing ring is fixedly connected to the wall of the feed pipe (42). The fixing ring is located inside the box body (20) and is fixedly connected to multiple guide grooves (37). Two blades are symmetrically fixedly connected to the side wall of the guide groove (37). The two blades and the lower end of the guide groove (37) are in contact with the lower inner wall of the box body (20).

5. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 4, characterized in that: A first pulley (8) is fixedly connected to the wall of the feed pipe (42). A motor (6) is fixedly connected to the upper end of the cover plate (2). A second pulley (16) is fixedly connected to the output end of the motor (6). Multiple belts (7) are wound together between the first pulley (8) and the second pulley (16). A feed nozzle (43) is fixedly connected to the upper end of the feed pipe (42). Multiple evenly distributed spiral holes are opened on the side wall of the feed nozzle (43). Multiple crushing blades (36) are fixedly connected to the wall of the feed pipe (42). All of the multiple crushing blades (36) are Y-shaped structures.

6. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 5, characterized in that: The grinding body (39) has multiple notches on its sidewall, which form multiple evenly distributed protrusions on the sidewall. The inner wall of the lower end of the outer shell (21) is connected to a rectangular rod. The center of the grinding body (39) is connected to the rod wall of the rectangular rod through a rectangular hole. The upper end of the rectangular rod is fixedly connected to a bracket. The lower end of the bracket is fixedly connected to multiple springs (46). The upper end of the grinding body (39) has multiple blind holes, and the multiple springs (46) are respectively fitted into the multiple blind holes. The lower end of the outer shell (21) is fixedly connected to multiple first strong magnets (40), and the lower end of the grinding body (39) is fixedly connected to multiple second strong magnets (50). The magnetic poles of the opposite ends of the first strong magnets (40) and the second strong magnets (50) are the same.

7. The grinding equipment for polycarboxylate high-performance water-reducing agent powder according to claim 6, characterized in that: The filtration mechanism includes a wind deflector ring (49), the upper end of which is fixed to the lower end of the cover plate (2). The lower end of the wind deflector ring (49) is provided with a connecting part, which is engaged with the inner wall of the tank (1). The side wall of the wind deflector ring (49) is provided with multiple evenly distributed exhaust channels. An annular frame (48) is fitted inside the wind deflector ring (49). An annular filter element (47) is fixedly connected inside the annular frame (48). Two connecting blocks are fixedly connected to the upper end of the annular frame (48). Two electric push rods (4) are fixedly connected to the upper end of the cover plate (2). The output ends of the two electric push rods (4) extend into the tank (1) and are fixedly connected to one side of the connecting block. A dust-collecting plate (12) is fixedly connected inside the tank (1). Multiple arc-shaped openings are provided on the side wall of the dust-collecting plate (12). Multiple arc-shaped strips are fixedly connected to the upper end of the dust-collecting plate (12).

8. A process for grinding polycarboxylate high-performance water-reducing agent powder using the grinding equipment described in claim 7, characterized in that: Includes the following steps; Step 1: First, start the grinding equipment. After the equipment is running, transport the agglomerated water-reducing agent to the hopper (5) through the raw material pipe. Step 2: Connect the air source and deliver compressed gas from the air inlet pipe to the feeding mechanism. The water-reducing agent enters the feeding mechanism through the spiral hole from the feeding pipe (42). The feeding mechanism delivers and coarsely grinds the water-reducing agent by means of airflow and mechanical agitation. Step 3: The water-reducing agent is further carried into the annular track by the airflow. The water-reducing agent powder is finely ground by the centrifugal force generated by the grinding mechanism in the annular track. The ground water-reducing agent is then discharged into the tank (1) by the airflow. Step 4: Start the electric push rod (4) to make the filter mechanism work. When the filter mechanism is working, it efficiently intercepts the ground water-reducing agent powder by switching the working surface of the annular filter element (47). Step 5: After grinding is completed, stop conveying the water-reducing agent particles and increase the compressed gas supply to carry away the residual powder in the equipment.

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