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

Abstract

The invention relates to the technical field of water reducer processing, and discloses a polycarboxylic acid high-performance water reducer powder grinding device and a process thereof.The device comprises a tank body and a hopper, an opening is formed in the upper end of the tank body, a cover plate is installed at the opening, and the upper end of the cover plate is fixedly connected with the lower end of the hopper through a support; a circular ring is fixedly connected to the lower end of the cover plate, an annular rail is fixedly connected to the lower end of the circular ring, a grinding mechanism is arranged in the annular rail, the grinding mechanism conducts fine grinding treatment on water reducing agent powder through centrifugal force generated in the annular rail, and the annular rail comprises a first annular groove and a second annular groove. According to the grinding equipment and process for the polycarboxylic acid high-performance water reducing agent powder, continuous grinding of a water reducing agent can be achieved, the water reducing agent powder is conveyed through air flow in the grinding process, the phenomenon that a grinding channel is blocked due to accumulation can be avoided, the air flow can be used for taking away the temperature generated in the grinding process, and the grinding efficiency is improved. And the grinding equipment can continuously work for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of water reducer processing, and particularly to a grinding device and process for polycarboxylate high-performance water reducer powder. Background Art

[0002] Due to its advantages such as low dosage, high water reduction rate, good slump retention, strong molecular structure adjustability, and environmental friendliness, polycarboxylate high-performance water reducer has become the most important product in the current market of concrete admixtures. Polycarboxylate water reducer is a comb-shaped water-soluble polymer, which consists of a main chain rich in carboxylic acid groups and polyoxyalkylene side chains. The carboxylic acid groups on the main chain of polycarboxylate can be adsorbed on the surface of positively charged cement or cement hydrates in a directional manner, while the polyoxyalkylene side chains stretch in the solution to form a hydration layer to provide steric repulsion to prevent cement agglomeration. Therefore, it endows the cement paste with good fluidity.

[0003] Currently, the widely used polycarboxylate water reducers are mostly solution products with a concentration of 10 - 50%. Due to the remoteness of some construction sites, especially for many overseas engineering projects in various countries, the low solid content will significantly increase the costs of logistics transportation, customs clearance, storage, etc. In addition, the widespread promotion and application of dry mortar have also put forward an urgent demand for the production and application of solid powder polycarboxylate water reducers. At present, most of the powder polycarboxylate water reducers on the market are obtained by spray drying. However, due to the relatively small molecular weight of polycarboxylate water reducer, its solid state is prone to softening above 80°C. If conventional drying methods such as spray drying are used to heat water and materials simultaneously, appropriate special additives must be added to achieve drying to obtain solid polycarboxylate water reducer. Therefore, the above problems can be solved by low-temperature drying. After low-temperature drying, lumpy solid polycarboxylate water reducer can be obtained, and then through a grinding device with improved process, solid polycarboxylate water reducer powder can be obtained, which is convenient for packaging, transportation and subsequent dilution with water for use.

[0004] Currently, when using traditional grinding equipment for grinding, the heat generated by friction during the grinding process of the grinding equipment is very high, and the softening point of polycarboxylate water reducer is very low, which is very likely to cause the softening and caking of solid polycarboxylate water reducer. As a result, the grinding equipment is generally easily blocked by the caked solid polycarboxylate water reducer, making the grinding equipment unable to work properly or unable to continuously work for grinding the water reducer. Summary of the Invention

[0005] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a grinding device and process for polycarboxylate superplasticizer powder, which solves the problems that the heat generated by friction during the grinding process of the grinding device is relatively high, which is very likely to cause the solid polycarboxylate superplasticizer to soften and agglomerate, and the grinding device is easily blocked by the agglomerated superplasticizer, resulting in the grinding device being unable to work properly or continuously grind the superplasticizer.

[0006] (II) Technical solution To achieve the above object, the present invention provides the following technical solution: A grinding device for polycarboxylate superplasticizer powder, comprising a tank body and a hopper. An opening is provided at the upper end of the tank body, 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 through a bracket. The lower end of the cover plate is fixedly connected to a ring, and the lower end of the ring is fixedly connected to an annular track. A grinding mechanism is arranged in the annular track, and the grinding mechanism finely grinds the superplasticizer powder by the centrifugal force generated in the annular track; The annular track includes a first annular groove and a second annular groove, the first annular groove and the second annular groove are connected by bolts, and a grinding plate is fixedly connected to the inner side of the second annular groove; The upper end of the cover plate is fixedly connected to a sleeve, and a feed pipe is rotatably connected in 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 provided with a feeding mechanism. The feeding mechanism conveys the superplasticizer particles to the grinding mechanism in two ways of air flow and mechanical agitation, and can coarsely grind the large-particle superplasticizer; One side of the tank body is fixedly connected to an air outlet pipe, a filtering mechanism is installed at the lower end of the cover plate, the lower end of the tank body is fixedly connected to a discharge pipe and a plurality of legs, and one side of the hopper is fixedly connected to a raw material pipe.

[0007] Preferably, the grinding mechanism includes a plurality of spheres. One side of each of the plurality of spheres is fixedly connected to a rectangular pipe. A tapered hole is formed through one side of the sphere, and the tapered hole is communicated with the rectangular pipe. A box body is fixedly connected to the pipe wall of the feed pipe. The side wall of the box body is fixedly connected to a first circular plate and a second circular plate. A plurality of rectangular plates are fixedly connected between the first circular plate and the second circular plate. The plurality of rectangular plates are arranged in pairs on the pipe wall of the rectangular pipe. A rectangular through hole is formed in the side wall of the box body, and a plurality of evenly distributed material passing channels are formed at the lower end of the box body. A plurality of scraping plates are arranged in the annular track, and the plurality of scraping plates are all fixed between the first circular plate and the second circular plate; An annular opening is arranged on the inner side of the annular track. The edges of the first circular plate and the second circular plate are inserted into the annular opening. Flanges are arranged on the outer sides of the first annular groove and the second annular groove, and inclined grooves are formed in both of the two flanges. The two inclined grooves together form a discharge hole.

[0008] Preferably, a first grinding portion is provided on the inner side of the annular track, a second grinding portion cooperating with the first grinding portion is provided on one side of the sphere, a plurality of cloth grooves are formed on one side of the second grinding portion, and the plurality of cloth grooves communicate with the tapered holes. A plurality of discharge grooves are formed in the side wall of the sphere.

[0009] Preferably, a plurality of rectangular grooves are formed at the lower end of the second circular plate, the plurality of rectangular grooves are annularly distributed, a plurality of uniformly distributed inclined holes penetrate between one side of the rectangular groove and the upper end of the second circular plate, and a strip-shaped through hole is formed at the lower end of the rectangular pipe. One side of the rectangular groove communicates with the edge of the second circular plate.

[0010] Preferably, a fixing ring is fixedly connected to the pipe wall of the feed pipe, the fixing ring is located inside the box body and fixedly connected with a plurality of material guide grooves, two blades are symmetrically and fixedly connected to the side wall of the material guide groove, and the lower ends of the two blades and the material guide groove are all in contact with the inner wall of the lower end of the box body.

[0011] Preferably, a first belt pulley is fixedly connected to the pipe wall of the feed pipe, a motor is fixedly connected to the upper end of the cover plate, a second belt pulley is fixedly connected to the output end of the motor, a plurality of belts are commonly wound between the first belt pulley and the second belt pulley, and a feed nozzle is fixedly connected to the upper end of the feed pipe. A plurality of uniformly distributed spiral holes are formed in the side wall of the feed nozzle, and a plurality of crushing blades are fixedly connected to the pipe wall of the feed pipe. The plurality of crushing blades are all of Y-shaped structures.

[0012] Preferably, the feeding mechanism includes a housing, the housing is fixed to the lower end of the grinding plate by bolts, an inner housing is arranged inside the housing, the upper end of the inner housing is coaxially fixed to the lower end pipe orifice of the feed pipe, a grinding orifice is formed at the lower end of the inner housing, and a plurality of first spiral vanes are fixedly connected to the side wall of the inner housing. A plurality of second spiral vanes are arranged between every two adjacent first spiral vanes, and the plurality of second spiral vanes are all fixed to the side wall of the inner housing; A grinding body is movably arranged in the inner housing, a third grinding portion is formed at the lower end of the grinding body, the diameter of the third grinding portion is smaller than the diameter of the grinding orifice, and the grinding orifice and the third grinding portion together form a grinding channel. A plurality of air inlet pipes are obliquely and fixedly connected to the side wall of the housing, one end of each of the plurality of air inlet pipes penetrates the side wall of the tank body, and a plurality of arc-shaped flow disturbing vanes are fixedly connected to the side wall of the inner housing. The plurality of arc-shaped flow disturbing vanes are all in contact with the inner wall of the lower end of the housing.

[0013] Preferably, a plurality of notches are formed in the side wall of the grinding body, and the plurality of notches form a plurality of uniformly distributed protrusions on the side wall of the grinding body. A rectangular rod is fixedly connected to the inner wall of the lower end of the outer shell. The center of the grinding body is sleeved on the rod wall of the rectangular rod through a rectangular hole. A bracket is fixedly connected to the upper end of the rectangular rod. A plurality of springs are fixedly connected to the lower end of the bracket. A plurality of blind holes are formed in the upper end of the grinding body, and the plurality of springs are respectively sleeved in the plurality of blind holes. A plurality of first strong magnets are fixedly connected to the lower end of the outer shell, and a plurality of second strong magnets are fixedly connected to the lower end of the grinding body. The opposite ends of the first strong magnet and the second strong magnet have the same magnetic pole.

[0014] Preferably, the filtering mechanism includes a wind shield ring. The upper end of the wind shield ring is fixed to the lower end of the cover plate. A connecting portion is provided at the lower end of the wind shield ring, and the connecting portion is clamped with the inner wall of the tank body. A plurality of uniformly distributed exhaust channels are formed in the side wall of the wind shield ring. An annular frame is sleeved in the wind shield ring. An annular filter element is fixedly connected in 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 body and are fixedly connected to one side of the connecting block. A dust settling plate is fixedly connected in the tank body. A plurality of arc-shaped openings are formed in the side wall of the dust settling plate. A plurality of arc-shaped strips are fixedly connected to the upper end of the dust settling plate.

[0015] The present invention also provides a grinding process for polycarboxylate superplasticizer powder, including the following steps; Step 1: First, start the grinding equipment to work. After the equipment runs, convey the caked superplasticizer to the hopper through the raw material pipe. Step 2: Connect the air source and convey compressed gas into the feeding mechanism from the air inlet pipe. The superplasticizer passes through the spiral hole and enters the feeding mechanism from the feeding pipe. The feeding mechanism conveys and coarsely grinds the superplasticizer by means of air flow and mechanical agitation. Step 3: The superplasticizer further enters the annular track along with the air flow. The centrifugal force generated by the grinding mechanism in the annular track is used to finely grind the superplasticizer powder. The ground superplasticizer is discharged obliquely into the tank body along with the air flow. Step 4: Start the electric push rod to make the filtering mechanism work. When the filtering mechanism works, the working surface of the annular filter element is switched to efficiently intercept the ground superplasticizer powder. Step 5: After grinding is completed, stop conveying the superplasticizer particles, and at the same time increase the compressed gas delivery volume to use the air flow to carry away the residual powder in the equipment.

[0016] (3) Beneficial effects Compared with the prior art, the present invention provides a grinding equipment and process for polycarboxylate superplasticizer powder, which have the following beneficial effects: 1. When the present invention is in use, starting the motor drives the second pulley to rotate. The rotation of the second pulley drives the belt to make the first pulley rotate. When the first pulley rotates, it drives the feed pipe to make the feed nozzle and the crushing blade stir and crush the water reducer particles in the hopper. When the feed pipe rotates, it drives the feeding mechanism to rotate. At this time, the water reducer can be conveyed by mechanical agitation in cooperation with air flow. After the water reducer enters the grinding mechanism with the air flow, the spheres in the grinding mechanism directly grind the water reducer again on the grinding surface. After grinding, it is timely discharged into the tank through the chute, so that continuous grinding of the water reducer can be realized, and during the grinding process, the water reducer powder is conveyed by the air flow, which can not only avoid the accumulation and blockage of the grinding channel, but also use the air flow to take away the temperature generated during the grinding process, enabling the grinding equipment to work continuously for a long time.

[0017] 2. In the grinding mechanism provided in the present invention, when in use, the rotation of the feed pipe drives the box body to make the first circular plate and the second circular plate rotate. When the first circular plate and the second circular plate rotate, they drive the rectangular pipe to make the spheres rotate. When the spheres rotate, centrifugal force is generated to make the second grinding part contact the first grinding part. At this time, the air flow entraining the water reducer enters the box body from the material passing channel, and then enters the rectangular pipe through the rectangular through holes on the box body. The water reducer in the rectangular pipe enters the cloth trough through the conical holes under the action of the air flow and centrifugal force. At this time, the water reducer particles enter between the first grinding part and the second grinding part. After grinding, the water reducer powder is obliquely discharged from the discharge hole with the air flow and blown towards the annular filter element, and a swirling flow is formed on the surface of the annular filter element, making it difficult for the water reducer powder to accumulate on its filter surface. In this way, efficient grinding can be achieved, and under the action of the air flow, the water reducer is not easy to accumulate and can also take away the temperature generated on the grinding surface.

[0018] 3. In the feeding mechanism provided in the present invention, when in use, the rotation of the feed pipe drives the grinding body to rotate in the inner shell. The protrusions can be used to roughly grind the water reducer. The roughly ground water reducer enters the grinding channel between the grinding port and the third grinding part. The grinding channel with a fixed gap further grinds the water reducer. And when the grinding body rotates, the multiple second strong magnets installed at its bottom alternately pass by the multiple first strong magnets. The repulsive force generated when the magnetic poles are the same can push the grinding body in the opposite direction to compress the spring to generate a reciprocating motion. When moving, the gap between the grinding block and the inner shell also alternately changes to form a variable-gap grinding space. In this way, it can be ensured that the water reducer can be smoothly fed and the water reducer can also be crushed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a grinding device for a polycarboxylate water reducer powder proposed by the present invention; Figure 2 is in a polycarboxylate water reducer powder grinding device proposed by the present invention Figure 1 of the cross-sectional view; Figure 3 Schematic structural diagram of a grinding mechanism and a feeding mechanism in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 4 Schematic structural diagram of a first circular plate, a second circular plate, a scraper and a box body in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 5 Schematic structural diagram of a first circular plate and a second circular plate in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 6 Schematic structural diagram of a rectangular pipe and a sphere in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 7 Schematic structural diagram of a feeding mechanism in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 8 Schematic structural diagram of a housing, an inner shell and a first strong magnet in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 9 Schematic structural diagram of an inner shell and a grinding body in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 10 Schematic structural diagram of a grinding body, a spring and a second strong magnet in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention; Figure 11 Schematic structural diagram of a filtering mechanism in a grinding device for a polycarboxylate superplasticizer powder proposed by the present invention.

[0020] In the figure: 1, tank body; 2, cover plate; 3, air outlet 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 settling plate; 13, first circular plate; 14, sleeve; 15, ring; 16, second pulley; 17, rectangular through hole; 18, scraper; 19, sphere; 20, box body; 21, housing; 22, first spiral piece; 23, rectangular pipe; 24, second circular plate; 25, grinding plate; 26, first grinding part; 27, second spiral piece; 28, inclined groove; 29, rectangular groove; 30, strip-shaped through hole; 31, inclined hole; 32, rectangular plate; 33, conical hole; 34, discharge groove; 35, second grinding part; 36, crushing blade; 37, material guiding groove; 38, inner shell; 39, grinding body; 40, first strong magnet; 41, arc-shaped flow disturbing piece; 42, feed pipe; 43, feed nozzle; 44, grinding port; 45, third grinding part; 46, spring; 47, annular filter element; 48, annular frame; 49, wind blocking ring; 50, second strong magnet. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: Referring to the attached Figures 1-11 , a grinding device for a polycarboxylate superplasticizer powder, comprising a tank body 1 and a hopper 5. An opening is provided at the upper end of the tank body 1, 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. The lower end of the cover plate 2 is fixedly connected to a ring 15, and the lower end of the ring 15 is fixedly connected to an annular track. A grinding mechanism is arranged in the annular track, and the grinding mechanism finely grinds the superplasticizer powder by the centrifugal force generated in the annular track; The annular track includes a first annular groove 10 and a second annular groove 11. The first annular groove 10 and the second annular groove 11 are connected by bolts, and a grinding plate 25 is fixedly connected to the inner side of the second annular groove 11; The upper end of the cover plate 2 is fixedly connected to a sleeve 14. 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, and the lower end of the feed pipe 42 extends into the annular track and is provided with a feeding mechanism. The feeding mechanism conveys the superplasticizer particles to the grinding mechanism in two ways, namely, by air flow and mechanical agitation, and can coarsely grind the large-particle superplasticizer; One side of the tank body 1 is fixedly connected with an air outlet pipe 3. A filtering mechanism is installed at the lower end of the cover plate 2. The filtering mechanism includes a windshield ring 49. The upper end of the windshield ring 49 is fixed to the lower end of the cover plate 2. A connecting part is arranged at the lower end of the windshield ring 49. The connecting part is clamped with the inner wall of the tank body 1. A plurality of uniformly distributed exhaust channels are formed in the side wall of the windshield ring 49. An annular frame 48 is sleeved in the windshield ring 49. An annular filter element 47 is fixedly connected in 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 both extend into the tank body 1 and are fixedly connected to one side of the connecting block. A dust reduction plate 12 is fixedly connected in the tank body 1. A plurality of arc-shaped openings are formed in the side wall of the dust reduction plate 12. A plurality of arc-shaped strips are fixedly connected to the upper end of the dust reduction plate 12. A discharge pipe 9 and a plurality of legs are fixedly connected to the lower end of the tank body 1. A raw material pipe is fixedly connected to one side of the hopper 5. A first belt pulley 8 is fixedly connected to the pipe wall of the feed pipe 42. A motor 6 is fixedly connected to the upper end of the cover plate 2. A second belt pulley 16 is fixedly connected to the output end of the motor 6. A plurality of belts 7 are wound around the first belt pulley 8 and the second belt pulley 16 together. A feed nozzle 43 is fixedly connected to the upper end of the feed pipe 42. A plurality of uniformly distributed spiral holes are formed in the side wall of the feed nozzle 43. A plurality of crushing blades 36 are fixedly connected to the pipe wall of the feed pipe 42. The plurality of crushing blades 36 are all in a Y-shaped structure.

[0023] The grinding process of the polycarboxylate superplasticizer powder is as follows: First, start the grinding equipment. After the equipment starts running, convey the caked water reducer to the hopper 5 through the raw material pipe. When the water reducer in the hopper 5 increases and accumulates to block the feeding nozzle 43 below the hopper 5, it can prevent a large amount of gas in the lower feeding mechanism from flowing into the hopper 5 and affecting the discharge of the grinding mechanism. Connect the air source and convey compressed air into the feeding mechanism from the air inlet pipe. When the feeding pipe 42 rotates, both the spiral holes and the crushing blades 36 can cut the water reducer particles, playing a role in crushing the caked water reducer. The crushed water reducer enters the feeding mechanism from the feeding pipe 42 through the spiral holes under the action of gravity. At this time, the position of the water reducer is lower than the feeding port position of the grinding mechanism. Under the action of the airflow and mechanical agitation in the feeding mechanism, the water reducer can be conveyed in a timely manner and can be roughly ground. The water reducer further enters the annular track with the airflow and is directly discharged onto the grinding surface in the annular track. The ground water reducer powder is discharged obliquely from the discharge hole with the airflow and realizes gas-solid separation under the interception of the annular filter element 47. Thus, the centrifugal force generated by the grinding mechanism in the annular track can be used to finely grind the water reducer powder, and the ground water reducer is discharged obliquely into the tank body 1 with the airflow. When the annular filter element 47 intercepts the water reducer powder, the working surface thereof is prone to accumulate the water reducer powder. At this time, the electric push rod 4 can be started to cause the filtering mechanism to displace. When the filtering mechanism displaces, the position of the working surface of the annular filter element 47 can be adjusted so that there is no airflow passing through the position where the water reducer powder accumulates. In this way, the accumulated water reducer powder can fall off automatically, and thus efficient interception of the ground water reducer powder can be realized. After the grinding is completed, stop conveying the water reducer particles, and at the same time increase the compressed air conveying volume to use the airflow to carry away the residual powder in the equipment.

[0024] When the present invention is in use, start the motor 6 to drive the second pulley 16 to rotate. The rotation of the second pulley 16 drives the belt 7 to make the first pulley 8 rotate. When the first pulley 8 rotates, it drives the feeding pipe 42 to stir and crush the water reducer particles in the hopper 5 with the feeding nozzle 43 and the crushing blades 36. When the feeding pipe 42 rotates, it drives the feeding mechanism to rotate. At this time, the water reducer can be conveyed through mechanical agitation in cooperation with the airflow. After the water reducer enters the grinding mechanism with the airflow, the sphere 19 in the grinding mechanism directly grinds the water reducer again on the grinding surface, and is discharged into the tank body 1 from the inclined groove 28 in a timely manner after grinding. Thus, continuous grinding of the water reducer can be realized, and during the grinding process, the water reducer powder is conveyed by the airflow, which can not only prevent accumulation and blockage of the grinding channel, but also use the airflow to carry away the temperature generated during the grinding process, enabling the grinding equipment to work continuously for a long time.

[0025] Embodiment 2: The difference from Embodiment 1 is that; Refer to the appendix Figures 2-6, The grinding mechanism includes multiple spheres 19. A rectangular tube 23 is fixedly connected to one side of each of the multiple spheres 19. A tapered hole 33 is formed through one side of the sphere 19, and the tapered hole 33 communicates with the rectangular tube 23. A box body 20 is fixedly connected to the tube 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. 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 tube wall of the rectangular tube 23. A rectangular through hole 17 is formed in the side wall of the box body 20. Multiple uniformly distributed material passing channels are formed at the lower end of the box body 20. Multiple scraping plates 18 are arranged in the annular track. The multiple scraping plates 18 are all fixed between the first circular plate 13 and the second circular plate 24; An annular opening is arranged 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. Flanges are arranged on the outer sides of the first annular groove 10 and the second annular groove 11. Oblique grooves 28 are formed at both flanges. The two oblique grooves 28 together form a discharge hole. A first grinding part 26 is arranged on the inner side of the annular track. A second grinding part 35 that cooperates with the first grinding part 26 is arranged on one side of the sphere 19. Multiple cloth grooves are formed on one side of the second grinding part 35. The multiple cloth grooves all communicate with the tapered hole 33. Multiple discharge grooves 34 are formed in the side wall of the sphere 19. Multiple rectangular grooves 29 are formed at the lower end of the second circular plate 24. The multiple rectangular grooves 29 are annularly distributed. Multiple uniformly distributed inclined holes 31 are formed through between one side of the rectangular groove 29 and the upper end of the second circular plate 24. A strip-shaped through hole 30 is formed at the lower end of the rectangular tube 23. One side of the rectangular groove 29 communicates with the edge of the second circular plate 24. A fixing ring is fixedly connected to the tube wall of the feed pipe 42. The fixing ring is located inside the box body 20 and fixedly connected with multiple guide grooves 37. Two blades are symmetrically and fixedly connected to the side wall of the guide groove 37. The two blades and the lower end of the guide groove 37 all contact the inner wall of the lower end of the box body 20.

[0026] In the grinding mechanism provided in the present invention, during use, the rotation of the feed pipe 42 drives the box body 20 to rotate the first circular plate 13 and the second circular plate 24. When the first circular plate 13 and the second circular plate 24 rotate, they drive the rectangular tube 23 to rotate the sphere 19. When the sphere 19 rotates, centrifugal force is generated to make the second grinding part 35 contact the first grinding part 26. At this time, the airflow entraining the water reducing agent enters the box body 20 from the material passing channels, and then enters the rectangular tube 23 through the rectangular through hole 17 on the box body 20. The water reducing agent in the rectangular tube 23 enters the cloth grooves through the tapered hole 33 under the action of the airflow and centrifugal force. 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 by the airflow and blown towards the annular filter element 47, and a swirling flow is formed on the surface of the annular filter element 47, so that the water reducing agent powder is not easily accumulated on its filter surface. In this way, efficient grinding can be achieved, and the water reducing agent is not easily accumulated under the action of the airflow, and the temperature generated on the grinding surface can also be taken away.

[0027] Example 3: Different from Example 1; Refer to the appendix Figures 7-10 , the feeding mechanism includes a housing 21, the housing 21 is fixed to the lower end of the grinding plate 25 by bolts, an inner housing 38 is arranged inside the housing 21, the upper end of the inner housing 38 is coaxially fixed at the lower end pipe orifice of the feeding pipe 42, a grinding orifice 44 is opened at the lower end of the inner housing 38, a plurality of first spiral vanes 22 are fixedly connected to the side wall of the inner housing 38, and a plurality of second spiral vanes 27 are arranged between every two adjacent first spiral vanes 22, and the plurality of second spiral vanes 27 are all fixed on the side wall of the inner housing 38; A grinding body 39 is movably arranged in the inner housing 38, a third grinding part 45 is opened at the lower end of the grinding body 39, the diameter of the third grinding part 45 is smaller than that of the grinding orifice 44, the grinding orifice 44 and the third grinding part 45 together form a grinding channel, a plurality of air inlet pipes are obliquely and fixedly connected to the side wall of the housing 21, one ends of the plurality of air inlet pipes all penetrate through the side wall of the tank body 1, a plurality of arc-shaped flow disturbing vanes 41 are fixedly connected to the side wall of the inner housing 38, and the plurality of arc-shaped flow disturbing vanes 41 are all in contact with the inner wall of the lower end of the housing 21. A plurality of notches are opened on the side wall of the grinding body 39, and the side wall of the grinding body 39 forms a plurality of uniformly distributed protrusions due to the plurality of notches. A rectangular rod is fixedly connected to the inner wall of the lower end of the housing 21, the center of the grinding body 39 is sleeved on the rod wall of the rectangular rod through a rectangular hole, a support is fixedly connected to the upper end of the rectangular rod, a plurality of springs 46 are fixedly connected to the lower end of the support, a plurality of blind holes are opened at the upper end of the grinding body 39, and the plurality of springs 46 are respectively sleeved in the plurality of blind holes. A plurality of first strong magnets 40 are fixedly connected to the lower end of the housing 21, and a plurality of second strong magnets 50 are fixedly connected to the lower end of the grinding body 39, and the opposite ends of the first strong magnets 40 and the second strong magnets 50 have the same magnetic poles.

[0028] In the feeding mechanism provided in the present invention, during use, the rotation of the feeding pipe 42 drives the grinding body 39 to rotate in the inner housing 38. The protrusions can be used to roughly grind the water reducing agent. The water reducing agent after rough grinding enters the grinding channel between the grinding orifice 44 and the third grinding part 45. The water reducing agent is further ground by the grinding channel with a fixed gap. And when the grinding body 39 rotates, the plurality of second strong magnets 50 installed at the bottom of it alternately pass by the plurality of first strong magnets 40. The repulsive force generated under the condition of the same magnetic poles can push the grinding body 39 in the opposite direction to compress the spring 46 to generate a reciprocating motion. When moving, the gap between the grinding block and the inner housing 38 also alternately changes to form a grinding space with a variable gap. In this way, it can ensure that the water reducing agent can be smoothly fed, and the water reducing agent can also be crushed. Finally, the water reducing agent falling into the housing 21 is further stirred by the first spiral vanes 22 and the second spiral vanes 27 and mixed with the air flow in the air inlet pipe. After mixing, it passes through the feeding channel and enters the grinding mechanism through the box body 20.

[0029] It should be noted that the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for polycarboxylate superplasticizer powder, comprising a tank body (1) and a hopper (5), characterized in that: An opening is provided at the upper end of the tank body (1), 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 arranged in the annular track, and the grinding mechanism finely grinds the water reducing agent powder by the centrifugal force generated in the annular track; The annular track includes a first annular groove (10) and a second annular groove (11), and the first annular groove (10) and the second annular groove (11) are connected by bolts. A grinding plate (25) is fixedly connected to the inner side of the second annular groove (11); 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), and the lower end of the feed pipe (42) extends into the annular track and is provided with a feeding mechanism. The feeding mechanism conveys the water reducing agent particles into the grinding mechanism by two methods of air flow and mechanical agitation, and can coarsely grind the large-particle water reducing agent; An air outlet pipe (3) is fixedly connected to one side of the tank body (1). A filtering mechanism is installed at the lower end of the cover plate (2). A discharge pipe (9) and a plurality of legs are fixedly connected to the lower end of the tank body (1). A raw material pipe is fixedly connected to one side of the hopper (5).

2. The grinding equipment for a polycarboxylate superplasticizer powder according to claim 1, characterized in that: The grinding mechanism includes a plurality of spheres (19). A rectangular pipe (23) is fixedly connected to one side of each of the plurality of spheres (19). A tapered hole (33) is formed through one side of the sphere (19), and the tapered hole (33) communicates with the rectangular pipe (23). A box body (20) is fixedly connected to the pipe 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 pipe wall of the rectangular pipe (23). A rectangular through hole (17) is formed in the side wall of the box body (20). A plurality of uniformly distributed material passing channels are formed at the lower end of the box body (20). A plurality of scraping plates (18) are arranged in the annular track, and the plurality of scraping plates (18) are all fixed between the first circular plate (13) and the second circular plate (24); An annular opening is arranged inside the annular track. The edges of the first circular plate (13) and the second circular plate (24) are inserted into the annular opening. Flanges are arranged on the outer sides of the first annular groove (10) and the second annular groove (11). Oblique grooves (28) are formed in both flanges, and the two oblique grooves (28) together form a discharge hole.

3. The grinding equipment for a polycarboxylate high-performance water reducer powder according to claim 2, characterized in that: A first grinding portion (26) is provided on the inner side of the annular track. A second grinding portion (35) cooperating with the first grinding portion (26) is provided on one side of the sphere (19). A plurality of cloth grooves are formed on one side of the second grinding portion (35), and the plurality of cloth grooves communicate with the conical hole (33). A plurality of discharge grooves (34) are formed in the side wall of the sphere (19).

4. The grinding equipment for a polycarboxylic acid high-performance water reducing agent powder according to claim 2, characterized in that: A plurality of rectangular grooves (29) are formed at the lower end of the second circular plate (24). The plurality of rectangular grooves (29) are annularly distributed. A plurality of uniformly distributed inclined holes (31) penetrate between one side of the rectangular groove (29) and the upper end of the second circular plate (24). A strip-shaped through hole (30) is formed at the lower end of the rectangular pipe (23). One side of the rectangular groove (29) communicates with the edge of the second circular plate (24).

5. The grinding equipment for a polycarboxylic high-performance water-reducing agent powder according to claim 1, wherein: A fixing ring is fixedly connected to the pipe wall of the feed pipe (42). The fixing ring is located inside the box body (20) and fixedly connected with a plurality of material guiding grooves (37). Two blades are symmetrically and fixedly connected to the side wall of the material guiding groove (37). The lower ends of the two blades and the material guiding groove (37) are all in contact with the inner wall of the lower end of the box body (20).

6. The grinding equipment for a polycarboxylate superplasticizer powder according to claim 1, characterized in that: A first belt pulley (8) is fixedly connected to the pipe wall of the feed pipe (42). A motor (6) is fixedly connected to the upper end of the cover plate (2). The output end of the motor (6) is fixedly connected with a second belt pulley (16). A plurality of belts (7) are jointly wound between the first belt pulley (8) and the second belt pulley (16). A feed nozzle (43) is fixedly connected to the upper end of the feed pipe (42). A plurality of uniformly distributed spiral holes are formed in the side wall of the feed nozzle (43). A plurality of crushing blades (36) are fixedly connected to the pipe wall of the feed pipe (42). The plurality of crushing blades (36) are all in a Y-shaped structure.

7. The grinding equipment for a polycarboxylate superplasticizer powder according to claim 1, characterized in that: The feeding mechanism includes a housing (21). The housing (21) is fixed to the lower end of the grinding plate (25) by bolts. An inner housing (38) is arranged inside the housing (21). The upper end of the inner housing (38) is coaxially fixed at the lower end pipe orifice of the feed pipe (42). A grinding port (44) is formed at the lower end of the inner housing (38). A plurality of first spiral vanes (22) are fixedly connected to the side wall of the inner housing (38). A plurality of second spiral vanes (27) are arranged between adjacent two of the first spiral vanes (22). The plurality of second spiral vanes (27) are all fixed to the side wall of the inner housing (38). A grinding body (39) is movably arranged in the inner housing (38). A third grinding portion (45) is formed at the lower end of the grinding body (39). The diameter of the third grinding portion (45) is smaller than the diameter of the grinding port (44). The grinding port (44) and the third grinding portion (45) jointly form a grinding channel. A plurality of air inlet pipes are obliquely and fixedly connected to the side wall of the housing (21). One end of each of the plurality of air inlet pipes penetrates the side wall of the tank body (1). A plurality of arc-shaped flow disturbing vanes (41) are fixedly connected to the side wall of the inner housing (38). The plurality of arc-shaped flow disturbing vanes (41) are all in contact with the inner wall of the lower end of the housing (21).

8. The grinding equipment for a polycarboxylate superplasticizer powder according to claim 7, characterized in that: The side wall of the grinding body (39) is provided with a plurality of notches, and the plurality of notches form a plurality of uniformly distributed protrusions on the side wall of the grinding body (39). The inner wall of the lower end of the outer shell (21) is fixedly connected with a rectangular rod. The center of the grinding body (39) is sleeved on the rod wall of the rectangular rod through a rectangular hole. The upper end of the rectangular rod is fixedly connected with a bracket. The lower end of the bracket is fixedly connected with a plurality of springs (46). The upper end of the grinding body (39) is provided with a plurality of blind holes, and the plurality of springs (46) are respectively sleeved in the plurality of blind holes. The lower end of the outer shell (21) is fixedly connected with a plurality of first strong magnets (40). The lower end of the grinding body (39) is fixedly connected with a plurality of second strong magnets (50). The opposite ends of the first strong magnet (40) and the second strong magnet (50) have the same magnetic poles.

9. The grinding equipment for a polycarboxylate superplasticizer powder according to claim 1, wherein: The filtering mechanism includes a wind shielding ring (49). The upper end of the wind shielding ring (49) is fixed to the lower end of the cover plate (2). The lower end of the wind shielding ring (49) is provided with a connecting portion, and the connecting portion is clamped with the inner wall of the tank body (1). The side wall of the wind shielding ring (49) is provided with a plurality of uniformly distributed exhaust channels. An annular frame (48) is sleeved in the wind shielding ring (49). An annular filter element (47) is fixedly connected in the annular frame (48). The upper end of the annular frame (48) is fixedly connected with two connecting blocks. The upper end of the cover plate (2) is fixedly connected with two electric push rods (4). The output ends of the two electric push rods (4) both extend into the tank body (1) and are fixedly connected with one side of the connecting block. A dust settling plate (12) is fixedly connected in the tank body (1). The side wall of the dust settling plate (12) is provided with a plurality of arc-shaped openings. The upper end of the dust settling plate (12) is fixedly connected with a plurality of arc-shaped strips.

10. A process for grinding polycarboxylate superplasticizer powder using the grinding equipment described in any one of claims 1-9, characterized in that: Including the following steps; Step 1: First, start the grinding equipment. After the equipment runs, convey the agglomerated water reducing agent to the hopper (5) through the raw material pipe. Step 2: Connect the air source and convey compressed air into the feeding mechanism from the air inlet pipe. The water reducing agent passes through the spiral holes and enters the feeding mechanism from the feeding pipe (42). The feeding mechanism conveys and coarsely grinds the water reducing agent by means of air flow and mechanical agitation. Step 3: The water reducing agent further enters the annular track along with the air flow. The centrifugal force generated by the grinding mechanism in the annular track is used to finely grind the water reducing agent powder. The ground water reducing agent is discharged obliquely into the tank body (1) along with the air flow. Step 4: Start the electric push rod (4) to make the filtering mechanism work. When the filtering mechanism works, 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. At the same time, increase the compressed air conveying volume, and use the air flow to carry away the residual powder in the equipment.

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