Powder grinding equipment

Abstract

The invention is suitable for the technical field of grinding processing, and provides powder grinding equipment which comprises a discharging box and a grinding box arranged on the discharging box. The quantity-controlled feeding mechanism comprises a baffle plate, a rotating pipe I and a feeding assembly, the baffle plate is fixedly mounted in the grinding box, the feeding assembly is arranged above the baffle plate, the rotating pipe I is rotationally mounted below the baffle plate, and an intermittent driving assembly is arranged in the baffle plate; the grinding mechanism comprises a fixed grinding block, a first movable grinding block and a second fixed grinding block, the first movable grinding block and the second fixed grinding block are fixedly installed on the first rotating pipe, and the grinding mechanism further comprises an auxiliary assembly used for improving the grinding effect. Through cooperative arrangement of the quantity control feeding mechanism and the grinding mechanism, the problems that the grinding effect is poor, crushing is uneven, and the machining quality is seriously affected due to the fact that a grinding structure in existing powder grinding equipment is relatively simple are solved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding processing, in particular to a powder grinding device. Background Art

[0002] In modern industrial production, powder grinding is an indispensable key link in many fields. For example, in the chemical industry, the production of various pigments, catalysts, additives, etc. often requires grinding raw materials into fine powder to ensure their activity and uniformity in chemical reactions, thereby improving product quality and performance; in the building materials industry, the fine grinding of powdered materials such as cement, lime, and gypsum is essential for the manufacture of high-strength, high-performance building materials, which directly affects the structural stability and durability of the building; in the pharmaceutical field, the degree of grinding of pharmaceutical raw materials is not only related to the dissolution rate and bioavailability of the drug, but also has a significant impact on the efficacy and safety of the drug. Many drugs require precise control of powder particle size to ensure their release and absorption characteristics in the body; the food industry is no exception. From fine flour processing to the preparation of various condiments and nutritional supplements, the appropriate powder particle size can improve the taste, quality stability and processing performance of the product.

[0003] However, traditional powder grinding equipment has exposed many problems in the face of growing industrial demand. The grinding structure of existing powder grinding equipment is relatively simple, resulting in poor grinding effect and uneven crushing, which seriously affects the processing quality. Therefore, in view of the above situation, it is urgent to provide a powder grinding equipment to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a powder grinding device to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides a powder grinding device, comprising:

[0006] A discharge box and a grinding box arranged on the discharge box, wherein the bottom of the grinding box is connected to the discharge box, and a feeding funnel for holding materials is also arranged on the top of the grinding box;

[0007] A controlled quantity feeding mechanism, the controlled quantity feeding mechanism comprises a shielding plate, a rotating tube 1 and a feeding assembly, the shielding plate is fixedly installed in the grinding box, the feeding assembly is arranged above the shielding plate, the rotating tube 1 is rotatably installed below the shielding plate, and an intermittent driving assembly for driving the feeding assembly to work and for driving the rotating tube 1 to rotate is arranged in the shielding plate;

[0008] The grinding mechanism comprises a fixed grinding block and a movable grinding block 1 and a fixed grinding block 2 fixedly mounted on a rotating tube 1. The fixed grinding block is fixedly mounted in a grinding box. The movable grinding block 1 and the fixed grinding block 2 are both arranged in the fixed grinding block. The grinding gap between the movable grinding block 1 and the fixed grinding block and the grinding gap between the fixed grinding block 2 and the fixed grinding block are gradually reduced from top to bottom. The grinding mechanism also includes an auxiliary component for improving the grinding effect.

[0009] As a further solution of the present invention: the feed assembly comprises:

[0010] A feed pipe fixedly mounted on the top of the grinding box, the feed pipe being connected to the feed hopper;

[0011] A rotating shaft is rotatably mounted on the shielding plate, a rotating plate is fixedly mounted on the rotating shaft, and two groups of expansion pipes for communicating with the feed pipe are arranged on the rotating plate;

[0012] A second rotating tube is slidably mounted on the rotating shaft, a circular plate is fixedly mounted on the second rotating tube, and a feeding pipe is provided on the circular plate which is slidably connected to the expansion pipe;

[0013] And a material control component for sealing the bottom of the feed pipe.

[0014] As a further solution of the present invention: the material control component comprises:

[0015] A lifting frame used to drive the second rotating tube to slide on the rotating shaft, the lifting frame is rotatably connected to the second rotating tube, and a telescopic cylinder used to drive the lifting frame to move is also provided on the shielding plate;

[0016] A control ring sleeved on the second rotating tube, the control ring is fixedly connected to an end of the telescopic cylinder away from the second rotating tube, and a recessed portion is formed on the control ring;

[0017] A control rod is rotatably installed at the bottom of the feeding tube, one end of the control rod is provided with a blocking cover for blocking the feeding tube, and the other end of the control rod is in sliding contact with the control ring.

[0018] As a further solution of the present invention: the intermittent drive assembly comprises:

[0019] A second motor is fixedly mounted in the shielding plate, and the second motor is connected to the first rotating tube via a first gear set;

[0020] Rotate a transmission shaft installed in the shielding plate, wherein the transmission shaft is connected to the rotating tube 1 through a gear set 2;

[0021] A second gear is fixedly mounted on the rotating shaft, and an incomplete gear is fixedly mounted on the transmission shaft for driving the second gear to rotate;

[0022] A limit block is fixedly mounted on the transmission shaft, and the limit block is a semicircular structure. A positioning plate is also fixedly mounted on the rotating shaft, and grooves are provided at both ends of the positioning plate for sliding contact with the limit block.

[0023] As a further solution of the present invention: the auxiliary component comprises:

[0024] A delay plate fixedly mounted on one side wall of the dynamic grinding block, wherein the delay plate is provided with two layers, and a plurality of groups of strip-shaped through holes are provided on the delay plate at equal intervals;

[0025] A rotating ring 1 acts on the grinding gap between the moving grinding block 1 and the fixed grinding block, the rotating ring 1 is rotatably installed in the fixed grinding block, and a plurality of groups of crushing knives 3 are fixedly installed on the inner wall of the rotating ring 1, the crushing knives 3 are located between the two groups of delay plates;

[0026] A rotating ring 2 acts on the grinding gap between the fixed grinding block 2 and the fixed grinding block, wherein the rotating ring 2 is rotatably installed in the fixed grinding block, and a plurality of groups of crushing knives 2 are arranged on the inner wall of the rotating ring 2;

[0027] A delay block for blocking the material on the fixed grinding block 2, wherein the delay blocks are arranged in multiple groups at equal intervals on the fixed grinding block 2, and the delay blocks are located below the crushing knife 2;

[0028] A driving shaft rotatably mounted in the fixed grinding block, wherein two sets of gears 1 are fixedly mounted on the driving shaft, and outer gear rings meshing with the two sets of gears 1 are respectively arranged on the outer walls of the rotating ring 1 and the rotating ring 2;

[0029] And a motor 1 for driving the driving shaft to rotate, wherein the motor 1 is arranged in the fixed grinding block.

[0030] As a further solution of the present invention: a cleaning strip 1 for scraping off materials above the delay plate is also provided on the inner wall of the rotating ring 1, and a cleaning strip 2 for scraping off materials above the delay block is also provided on the inner wall of the rotating ring 2.

[0031] As a further solution of the present invention: the auxiliary component also includes:

[0032] A retaining ring for sealing the grinding gap between the movable grinding block 1 and the fixed grinding block, wherein the retaining ring is slidably installed in the movable grinding block 1;

[0033] An annular grinding plate for grinding materials in cooperation with the retaining ring, wherein the annular grinding plate is rotatably mounted on the inner wall of the fixed grinding block and is fixedly connected to a rotating ring;

[0034] A control box, wherein the control box is fixedly installed in the movable grinding block 1, and a piston plate is also slidably installed in the control box;

[0035] A spring for elastically supporting the piston plate, wherein the spring is arranged in the control box;

[0036] A push-pull rod slidably mounted on the control box, one end of the push-pull rod is fixedly connected to the piston plate, and the other end of the push-pull rod is fixedly connected to the retaining ring via a linkage plate;

[0037] And a catheter, one end of which is communicated with the control box, and the other end of which is communicated with the rotating tube.

[0038] As a further solution of the present invention: a plurality of dispersion rods are fixedly mounted on the rotating tube 1, and the dispersion rods are L-shaped structures, and one end of the dispersion rods away from the rotating tube 1 is in sliding contact with the top of the fixed grinding block.

[0039] As a further solution of the present invention: a plurality of groups of crushing knives 1 are fixedly mounted on the rotating tube 1, and the crushing knives 1 are located between the fixed grinding block and the movable grinding block 1.

[0040] As a further solution of the present invention: the grinding gap between the movable grinding block 1 and the fixed grinding block is larger than the grinding gap between the fixed grinding block 2 and the fixed grinding block.

[0041] By adopting the above technical scheme, the present invention has the following beneficial effects: the material to be ground (i.e., powder) is placed in the feed hopper, and the material in the feed hopper can be intermittently fed into the grinding mechanism by using the controlled amount feed mechanism, and the rotating tube 1 can grind the powder by driving the dynamic grinding block 1 and the fixed grinding block 2 to rotate in the fixed grinding block, and the setting of the dynamic grinding block 1 and the fixed grinding block 2 can realize graded grinding of the powder, and with the auxiliary components, the material can be fully ground, and the grinding effect is further improved. After the material is ground, it will enter the discharge box through the grinding gap between the fixed grinding block 2 and the fixed grinding block, and be discharged from the opening at the bottom of the discharge box, which is convenient for subsequent processing;

[0042] The motor 1, the drive shaft, the gear 1 and the outer gear ring are arranged in coordination, so that the rotating ring 1 and the rotating ring 2 can be driven to rotate, and the direction of the rotating ring 1 and the rotating ring 2 is arranged opposite to the direction of the rotating tube 1, so as to improve the grinding effect. The delay plate can be used to slow down the speed at which the material enters the gap 1. When the rotating ring 1 drives the crushing knife 3 to rotate between the two layers of the delay plate, the material can be cut and crushed, and the large particles in the powder can be effectively crushed. The material passing through the delay plate will enter the gap 1 for grinding. Since the gap 1 is larger than the gap 2, the feeding speed of the material entering between the dynamic grinding block 1 and the fixed grinding block 2 is greater than the speed at which the material enters the gap 2. In combination with the blocking effect of the delay block, the material has a certain accumulation effect between the dynamic grinding block 1 and the fixed grinding block 2. At this time, the rotating crushing knife 1 and the crushing knife 2 can be used to achieve secondary crushing of the large particles in the material, and the final grinding effect is completed after the material enters the gap 2.

[0043] When the material is difficult to grind, gas is filled into the rotating tube. After the gas enters the control box, it pushes the piston plate to move. The piston plate, the push-pull rod and the linkage plate are used to drive the baffle ring to press onto the annular grinding plate. After the baffle ring is pressed, the gap between the baffle ring and the annular grinding plate is a ">"-shaped structure, which can achieve blocking of the gap while the material can normally enter between the baffle ring and the annular grinding plate. The baffle ring and the annular grinding plate can be used to further grind the material, effectively remove large particles in the material, and ultimately improve the grinding quality.

[0044] By coordinating the controlled feeding mechanism with the grinding mechanism, the problem of relatively simple grinding structure in the existing powder grinding equipment, resulting in poor grinding effect, uneven crushing and serious impact on processing quality is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a schematic diagram of the structure of the present invention.

[0047] Figure 2 for Figure 1 Schematic diagram of the internal structure.

[0048] Figure 3 It is a schematic cross-sectional structural diagram of the grinding mechanism in the present invention.

[0049] Figure 4for Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0050] Figure 5 It is a schematic diagram of the structure of the rotating ring 1 in the present invention.

[0051] Figure 6 It is a schematic diagram of the structure of the second rotating ring in the present invention.

[0052] Figure 7 It is a schematic diagram of the structure of the movable grinding block 1 and the movable grinding block 2 in the present invention.

[0053] Figure 8 It is a schematic cross-sectional structural diagram of the control box in the present invention.

[0054] Fig. 9 It is a structural schematic diagram of the controlled feeding mechanism in the present invention.

[0055] Fig.10 for Fig. 9 Schematic diagram of the rear view structure.

[0056] Fig.11 for Fig.10 Schematic diagram of the enlarged structure at point B in the middle.

[0057] Fig.12 for Fig.10 Schematic diagram of the enlarged structure at point C in the middle.

[0058] In the attached figure: 1-discharge box, 2-grinding box, 3-feeding funnel, 4-shielding plate, 5-fixed grinding block, 6-rotating shaft, 7-rotating tube 1, 8-moving grinding block 1, 9-dispersion rod, 10-fixed grinding block 2, 11-control box, 12-rotating ring 1, 13-blocking ring, 14-annular grinding plate, 15-rotating ring 2, 16-gear 1, 17-driving shaft, 18-motor 1, 19-crushing knife 1, 20-crushing knife 2, 21-delay block, 22-delay plate, 23-sweeping strip 1, 24-crushing knife 3, 25-cleaning strip 2, 26-push-pull rod, 27-piston plate, 28-conduit, 29-spring, 30-linkage plate, 31-discharge pipe, 32-feed pipe, 33-rotating plate, 34-expansion pipe, 35-control ring, 36-rotating pipe 2, 37-lifting frame, 38-telescopic cylinder, 39-blocking cover, 40-motor 2, 41-gear 2, 42-positioning plate, 43-gear set 1, 44-gear set 2, 45-transmission shaft, 46-limiting block, 47-incomplete gear, 48-control rod. DETAILED DESCRIPTION

[0059] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0062] The present invention is further explained below in conjunction with specific implementation modes.

[0063] See also Figure 1-Figure 12 , an embodiment of the present invention provides a powder grinding device, the powder grinding device comprising:

[0064] A discharge box 1 and a grinding box 2 arranged on the discharge box 1, wherein the bottom of the grinding box 2 is connected to the discharge box 1, and a feeding funnel 3 for holding materials is also arranged on the top of the grinding box 2;

[0065] A controlled quantity feeding mechanism, the controlled quantity feeding mechanism comprises a shielding plate 4, a rotating tube 7 and a feeding assembly, the shielding plate 4 is fixedly installed in the grinding box 2, the feeding assembly is arranged above the shielding plate 4, the rotating tube 7 is rotatably installed below the shielding plate 4, and an intermittent driving assembly for driving the feeding assembly to work and for driving the rotating tube 7 to rotate is arranged in the shielding plate 4;

[0066] The grinding mechanism includes a fixed grinding block 5 and a dynamic grinding block 1 8 and a fixed grinding block 2 10 fixedly mounted on a rotating tube 1 7. The fixed grinding block 5 is fixedly mounted in a grinding box 2. The dynamic grinding block 1 8 and the fixed grinding block 2 10 are both arranged in the fixed grinding block 5. The grinding gap between the dynamic grinding block 1 8 and the fixed grinding block 5 and the grinding gap between the fixed grinding block 2 10 and the fixed grinding block 5 are gradually reduced from top to bottom. The grinding mechanism also includes auxiliary components for improving the grinding effect.

[0067] In the embodiment of the present invention, when in use, the material to be ground (i.e., powder) is placed in the feed hopper 3, and the material in the feed hopper 3 can be intermittently fed into the grinding mechanism by means of the controlled feeding mechanism. The rotating tube 7 can grind the powder by driving the dynamic grinding block 8 and the fixed grinding block 10 to rotate in the fixed grinding block 5. The setting of the dynamic grinding block 8 and the fixed grinding block 10 can realize graded grinding of the powder, and with the auxiliary components, the material can be fully ground to further improve the grinding effect. After the material is ground, it will enter the discharge box 1 through the grinding gap between the fixed grinding block 10 and the fixed grinding block 5, and be discharged from the opening at the bottom of the discharge box 1, which is convenient for subsequent processing. Compared with the prior art, the present invention avoids the problem that the grinding structure in the existing powder grinding equipment is relatively simple, resulting in poor grinding effect, uneven crushing, and serious impact on processing quality through the coordinated setting of the controlled feeding mechanism and the grinding mechanism.

[0068] In one embodiment of the present invention, see Figure 1-Figure 12 , the feed assembly comprises:

[0069] A feed pipe 32 fixedly mounted on the top of the grinding box 2, wherein the feed pipe 32 is connected to the feed hopper 3;

[0070] A rotating shaft 6 is rotatably mounted on the shielding plate 4, on which a rotating plate 33 is fixedly mounted, and on which two groups of expansion pipes 34 are arranged for communicating with the feed pipe 32;

[0071] A second rotating tube 36 slidably mounted on the rotating shaft 6, a circular plate is fixedly mounted on the second rotating tube 36, and a feed tube 31 slidably connected to the expansion tube 34 is disposed on the circular plate;

[0072] and a material control component for blocking the bottom of the feed pipe 31;

[0073] The material control component comprises:

[0074] A lifting frame 37 for driving the second rotating tube 36 to slide on the rotating shaft 6, wherein the lifting frame 37 is rotatably connected to the second rotating tube 36, and a telescopic cylinder 38 for driving the lifting frame 37 to move is also provided on the shielding plate 4;

[0075] A control ring 35 sleeved on the second rotating tube 36, the control ring 35 is fixedly connected to one end of the telescopic cylinder 38 away from the second rotating tube 36, and a recessed portion is formed on the control ring 35;

[0076] A control rod 48 is rotatably mounted on the bottom of the feed tube 31. One end of the control rod 48 is provided with a blocking cover 39 for blocking the feed tube 31. The other end of the control rod 48 is in sliding contact with the control ring 35.

[0077] The intermittent drive assembly comprises:

[0078] A second motor 40 is fixedly mounted in the shielding plate 4, and the second motor 40 is connected to the rotating tube 7 via a gear set 43; wherein the gear set 43 is two sets of mutually meshing bevel gears;

[0079] The transmission shaft 45 is rotatably mounted in the shielding plate 4, and the transmission shaft 45 is connected to the rotating tube 7 via a second gear set 44; wherein the second gear set 44 is two sets of mutually meshing spur gears;

[0080] A second gear 41 is fixedly mounted on the rotating shaft 6, and an incomplete gear 47 is fixedly mounted on the transmission shaft 45 for driving the second gear 41 to rotate;

[0081] A limit block 46 is fixedly mounted on the transmission shaft 45 , and the limit block 46 is a semicircular structure. A positioning plate 42 is also fixedly mounted on the rotating shaft 6 , and grooves are provided at both ends of the positioning plate 42 for sliding contact with the limit block 46 .

[0082] In this embodiment, the motor 2 40 and the gear set 1 43 are used to drive the rotating tube 1 7 to rotate, and the gear set 2 44 can drive the transmission shaft 45 to rotate, and the rotation speed of the rotating tube 1 7 is greater than the rotation speed of the transmission shaft 45. The incomplete gear 47 can drive the gear 2 41 to rotate 180 degrees at a time, thereby realizing intermittent driving of the rotating shaft 6, and when the incomplete gear 47 is engaged with the gear 2 41, the positioning plate 42 is separated from the limit block 46, and when the incomplete gear 47 is separated from the gear 2 41, the limit block 46 is just in contact with the positioning plate 42. The groove on one side of the plate 42 contacts, so that when the incomplete gear 47 is not meshed with the gear 2 41, the rotating shaft 6 is in a stationary state; the rotating shaft 6 can drive the rotating plate 33 to rotate, and the circular plate on the rotating tube 2 36 can rotate with the rotating plate 33 through the matching arrangement of the expansion tube 34 and the discharge tube 31. When the end of the control rod 48 away from the blocking cover 39 contacts the area outside the recessed part of the control ring 35, the control ring 35 can be used to press the end of the control rod 48 away from the blocking cover 39, so that the blocking cover 39 is pressed on the discharge tube. The bottom of the feed pipe 31 is moved to the bottom of the feed pipe 32 every time the rotating shaft 6 rotates, and the raw materials in the feed hopper 3 will enter the expanding pipe 34 through the feed pipe 32. Then the rotating shaft 6 will continue to drive the rotating plate 33 to rotate once. When the rotating plate 33 rotates 180 degrees, the end of the control rod 48 away from the blocking cover 39 will enter the recessed portion, so that the blocking cover 39 is separated from the bottom of the feed pipe 31, and the raw materials in the feed pipe 31 will enter the grinding mechanism; the telescopic cylinder 38 is used to drive the lifting frame 37, the rotating pipe 36 and the The control ring 35 moves in such a way that the feed pipe 31 can slide on the expansion pipe 34 and adjust the volume, thereby realizing the control of the amount of material entering at a single time. If the powder is not easy to grind, the feed amount for each time is appropriately reduced, otherwise the feed amount is increased, thereby improving the grinding quality. Continuous intermittent feeding can avoid the accumulation of materials in the grinding mechanism and further improve the grinding effect. There is a large opening between one end of the baffle plate 4 and the inner wall of the grinding box 2, which can make the material in the feed pipe 31 fall smoothly into the fixed grinding block 5.

[0083] In one embodiment of the present invention, see Figure 1-Figure 12 , the auxiliary components include:

[0084] A delay plate 22 fixedly mounted on the side wall of the moving grinding block 8, wherein the delay plate 22 is provided with two layers, and a plurality of groups of strip-shaped through holes are provided on the delay plate 22 at equal intervals;

[0085] A rotating ring 12 acts on the grinding gap between the moving grinding block 8 and the fixed grinding block 5. The rotating ring 12 is rotatably installed in the fixed grinding block 5, and multiple groups of crushing knives 3 24 are fixedly installed on the inner wall of the rotating ring 12. The crushing knives 3 24 are located between the two groups of delay plates 22;

[0086] A rotating ring 15 acting in the grinding gap between the fixed grinding block 10 and the fixed grinding block 5, wherein the rotating ring 15 is rotatably installed in the fixed grinding block 5, and a plurality of groups of crushing knives 20 are arranged on the inner wall of the rotating ring 15;

[0087] A delay block 21 for blocking the material on the fixed grinding block 10, wherein a plurality of delay blocks 21 are arranged at equal intervals on the fixed grinding block 10, and the delay blocks 21 are located below the crushing knife 20;

[0088] A driving shaft 17 is rotatably mounted in the fixed grinding block 5, and two sets of gears 16 are fixedly mounted on the driving shaft 17, and outer gear rings meshing with the two sets of gears 16 are respectively arranged on the outer walls of the rotating ring 12 and the rotating ring 2 15;

[0089] and a motor 18 for driving the driving shaft 17 to rotate, wherein the motor 18 is disposed in the fixed grinding block 5;

[0090] The inner wall of the rotating ring 12 is also provided with a cleaning strip 1 23 for scraping off the material above the delay plate 22, and the inner wall of the rotating ring 2 15 is also provided with a cleaning strip 25 for scraping off the material above the delay block 21;

[0091] The auxiliary components also include:

[0092] A retaining ring 13 for sealing the grinding gap between the moving grinding block 8 and the fixed grinding block 5, wherein the retaining ring 13 is slidably installed in the moving grinding block 8;

[0093] An annular grinding plate 14 for grinding the material in cooperation with the retaining ring 13, wherein the annular grinding plate 14 is rotatably mounted on the inner wall of the fixed grinding block 5, and the annular grinding plate 14 is fixedly connected to the rotating ring 12;

[0094] A control box 11, wherein the control box 11 is fixedly installed in the movable grinding block 8, and a piston plate 27 is also slidably installed in the control box 11;

[0095] A spring 29 for elastically supporting the piston plate 27, wherein the spring 29 is disposed in the control box 11;

[0096] A push-pull rod 26 slidably mounted on the control box 11, one end of the push-pull rod 26 is fixedly connected to the piston plate 27, and the other end of the push-pull rod 26 is fixedly connected to the retaining ring 13 via a linkage plate 30;

[0097] and a conduit 28, one end of which is connected to the control box 11, and the other end of which is connected to the rotating tube 7; when in use, an air slip ring is installed at the bottom of the rotating tube 7, and the rotating tube 7 is connected to an external gas source by the air slip ring, so that the gas is introduced into the control box 11 through the rotating tube 7 and the conduit 28;

[0098] The rotating tube 7 is also fixedly mounted with a plurality of dispersing rods 9, and the dispersing rods 9 are L-shaped structures, and one end of the dispersing rods 9 away from the rotating tube 7 is in sliding contact with the top of the fixed grinding block 5, and the rotating dispersing rods 9 are used to break up the feed material so that the material is evenly dispersed into the fixed grinding block 5;

[0099] The rotating tube 7 is also fixedly mounted with multiple sets of crushing knives 19, and the crushing knives 19 are located between the fixed grinding block 5 and the movable grinding block 8;

[0100] The grinding gap between the movable grinding block 1 8 and the fixed grinding block 5 is larger than the grinding gap between the fixed grinding block 2 10 and the fixed grinding block 5 .

[0101] In this embodiment, the grinding gap between the dynamic grinding block 1 8 and the fixed grinding block 5 is defined as gap 1, and the grinding gap between the fixed grinding block 2 10 and the fixed grinding block 5 is defined as gap 2; the motor 18, the drive shaft 17, the gear 16 and the outer gear ring are matched to drive the rotating ring 12 and the rotating ring 2 15 to rotate, and the rotation direction of the rotating ring 12 and the rotating ring 2 15 is set to be opposite to the rotation direction of the rotating tube 1 7, so as to improve the grinding effect, and the delay plate 22 can be used to slow down the speed at which the material enters the gap 1, and when the rotating ring 12 drives the crushing knife 3 24 to rotate between the two layers of the delay plate 22, the material can be crushed. Cutting and crushing are carried out to effectively crush large particles in the powder. The material passing through the delay plate 22 will enter the gap one for grinding. Since the gap one is larger than the gap two, the feeding speed of the material entering between the dynamic grinding block one 8 and the fixed grinding block two 10 is greater than the speed of the material entering the gap two. In combination with the blocking effect of the delay block 21, the material has a certain accumulation effect between the dynamic grinding block one 8 and the fixed grinding block two 10. At this time, the rotating crushing knife one 19 and the crushing knife two 20 can realize the secondary crushing of large particles in the material. The material completes the final grinding after entering the gap two.

[0102] When it is difficult to grind the material, gas is filled into the rotating tube 7. After the gas enters the control box 11, it pushes the piston plate 27 to move. The piston plate 27, the push-pull rod 26 and the linkage plate 30 are arranged in coordination, so that the baffle ring 13 can be driven to be pressed onto the annular grinding plate 14. After the baffle ring 13 is pressed, the gap between the baffle ring 13 and the annular grinding plate 14 is a “>”-shaped structure, which can achieve blocking of the gap while the material can normally enter between the baffle ring 13 and the annular grinding plate 14. The baffle ring 13 and the annular grinding plate 14 can be used to further grind the material, effectively remove large particles in the material, and ultimately improve the grinding quality.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A powder grinding device, comprising a discharge box and a grinding box arranged on the discharge box, wherein the bottom of the grinding box is connected to the discharge box, and a feeding funnel for holding materials is also arranged on the top of the grinding box, characterized in that: Also includes: A controlled quantity feeding mechanism, the controlled quantity feeding mechanism comprises a shielding plate, a rotating tube 1 and a feeding assembly, the shielding plate is fixedly installed in the grinding box, the feeding assembly is arranged above the shielding plate, the rotating tube 1 is rotatably installed below the shielding plate, and an intermittent driving assembly for driving the feeding assembly to work and for driving the rotating tube 1 to rotate is arranged in the shielding plate; The grinding mechanism comprises a fixed grinding block and a movable grinding block 1 and a fixed grinding block 2 fixedly mounted on a rotating tube 1. The fixed grinding block is fixedly mounted in a grinding box. The movable grinding block 1 and the fixed grinding block 2 are both arranged in the fixed grinding block. The grinding gap between the movable grinding block 1 and the fixed grinding block and the grinding gap between the fixed grinding block 2 and the fixed grinding block are gradually reduced from top to bottom. The grinding mechanism also includes an auxiliary component for improving the grinding effect.

2. The powder grinding equipment according to claim 1, characterized in that: The feed assembly comprises: A feed pipe fixedly mounted on the top of the grinding box, the feed pipe being connected to the feed hopper; A rotating shaft is rotatably mounted on the shielding plate, a rotating plate is fixedly mounted on the rotating shaft, and two groups of expansion pipes for communicating with the feed pipe are arranged on the rotating plate; A second rotating tube is slidably mounted on the rotating shaft, a circular plate is fixedly mounted on the second rotating tube, and a feeding pipe is provided on the circular plate which is slidably connected to the expansion pipe; And a material control component for sealing the bottom of the feed pipe.

3. The powder grinding equipment according to claim 2, characterized in that: The material control component comprises: A lifting frame used to drive the second rotating tube to slide on the rotating shaft, the lifting frame is rotatably connected to the second rotating tube, and a telescopic cylinder used to drive the lifting frame to move is also provided on the shielding plate; A control ring sleeved on the second rotating tube, the control ring is fixedly connected to an end of the telescopic cylinder away from the second rotating tube, and a recessed portion is formed on the control ring; A control rod is rotatably installed at the bottom of the feeding tube, one end of the control rod is provided with a blocking cover for blocking the feeding tube, and the other end of the control rod is in sliding contact with the control ring.

4. The powder grinding equipment according to claim 3, characterized in that: The intermittent drive assembly comprises: A second motor is fixedly mounted in the shielding plate, and the second motor is connected to the first rotating tube via a first gear set; Rotate a transmission shaft installed in the shielding plate, wherein the transmission shaft is connected to the rotating tube 1 through a gear set 2; A second gear is fixedly mounted on the rotating shaft, and an incomplete gear is fixedly mounted on the transmission shaft for driving the second gear to rotate; A limit block is fixedly mounted on the transmission shaft, the limit block is a semicircular structure, and a positioning plate is also fixedly mounted on the rotating shaft, and grooves are provided at both ends of the positioning plate for sliding contact with the limit block.

5. The powder grinding equipment according to claim 1, characterized in that: The auxiliary components include: A delay plate fixedly mounted on one side wall of the dynamic grinding block, wherein the delay plate is provided with two layers, and a plurality of groups of strip-shaped through holes are provided on the delay plate at equal intervals; A rotating ring 1 acts on the grinding gap between the moving grinding block 1 and the fixed grinding block, the rotating ring 1 is rotatably installed in the fixed grinding block, and a plurality of groups of crushing knives 3 are fixedly installed on the inner wall of the rotating ring 1, the crushing knives 3 are located between the two groups of delay plates; A rotating ring 2 acts on the grinding gap between the fixed grinding block 2 and the fixed grinding block, wherein the rotating ring 2 is rotatably installed in the fixed grinding block, and a plurality of groups of crushing knives 2 are arranged on the inner wall of the rotating ring 2; A delay block for blocking the material on the fixed grinding block 2, wherein the delay blocks are arranged in multiple groups at equal intervals on the fixed grinding block 2, and the delay blocks are located below the crushing knife 2; A driving shaft rotatably mounted in the fixed grinding block, wherein two sets of gears 1 are fixedly mounted on the driving shaft, and outer gear rings meshing with the two sets of gears 1 are respectively arranged on the outer walls of the rotating ring 1 and the rotating ring 2; And a motor 1 for driving the driving shaft to rotate, wherein the motor 1 is arranged in the fixed grinding block.

6. The powder grinding equipment according to claim 5, characterized in that: A cleaning strip 1 for scraping off materials above the delay plate is also provided on the inner wall of the rotating ring 1, and a cleaning strip 2 for scraping off materials above the delay block is also provided on the inner wall of the rotating ring 2.

7. The powder grinding equipment according to claim 5, characterized in that: The auxiliary components also include: A retaining ring for sealing the grinding gap between the movable grinding block 1 and the fixed grinding block, wherein the retaining ring is slidably installed in the movable grinding block 1; An annular grinding plate for grinding materials in cooperation with the retaining ring, the annular grinding plate being rotatably mounted on the inner wall of the fixed grinding block and being fixedly connected to a rotating ring; A control box, wherein the control box is fixedly installed in the movable grinding block 1, and a piston plate is also slidably installed in the control box; A spring for elastically supporting the piston plate, wherein the spring is arranged in the control box; A push-pull rod slidably mounted on the control box, one end of the push-pull rod is fixedly connected to the piston plate, and the other end of the push-pull rod is fixedly connected to the retaining ring via a linkage plate; And a catheter, one end of which is communicated with the control box, and the other end of which is communicated with the rotating tube.

8. The powder grinding equipment according to claim 5, characterized in that: A plurality of dispersion rods are fixedly mounted on the rotating tube 1, and the dispersion rods are L-shaped structures. One end of the dispersion rods away from the rotating tube 1 is in sliding contact with the top of the fixed grinding block.

9. The powder grinding equipment according to claim 5, characterized in that: A plurality of groups of crushing knives are fixedly mounted on the rotating tube 1, and the crushing knives are located between the fixed grinding block and the movable grinding block 1.

10. The powder grinding equipment according to claim 1, characterized in that: The grinding gap between the movable grinding block 1 and the fixed grinding block is larger than the grinding gap between the fixed grinding block 2 and the fixed grinding block.

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