Accurate grinding structure for anti-cracking agent raw material pretreatment

Abstract

The utility model relates to the technical field of anti-cracking agent raw material pretreatment, discloses an accurate grinding structure for anti-cracking agent raw material pretreatment, and solves the problems that when an anti-cracking agent is ground, large particles are crushed in a manual grinding mode, the working personnel cannot keep stable rotating speed and grinding force due to fatigue, and the grinding efficiency is low. The device comprises a material conveying box, a fine grinding device is arranged at the lower end of the material conveying box, a collecting device is arranged at the lower end of the fine grinding device, the materials enter a material conveying pipe through a material conveying hopper and are preliminarily filtered through the filter screen, coarse particles of the anti-cracking agent raw materials are reserved on the filter screen, and the coarse particles of the anti-cracking agent raw materials are collected through the collecting device. Coarse grains reserved on the filter screen drive the rotating rod to rotate by starting the first rotating motor, then the filter screen rotates, and the coarse grains are discharged into the fine grinding device at the lower end through the discharging groove for fine grinding.

Description

Technical Field

[0001] This utility model relates to the field of anti-cracking agent raw material pretreatment technology, specifically a fine grinding structure for anti-cracking agent raw material pretreatment. Background Technology

[0002] Concrete expansion crack-resistant agent is a concrete admixture that compensates for concrete shrinkage and reduces the formation of cracks. Through a hydration reaction, it generates a harmless and structurally stable compound within the concrete, thereby compensating for shrinkage and reducing crack formation. The main raw materials for concrete expansion crack-resistant agent are expanded clinker, fly ash, limestone, and gypsum.

[0003] A Chinese patent with publication number CN209885660U discloses an apparatus for preparing an anti-cracking agent. The raw materials for the anti-cracking agent enter the grinding chamber through a first inlet and are filtered through a filter screen. The filtered raw materials then enter the mixing drum through a connecting pipe via a second inlet. Large particles remain on the filter screen. The operator then rotates a handle, causing a first rotating shaft to rotate. This shaft drives a grinding plate in a circular motion, grinding the large particles on the filter screen into smaller particles. These smaller particles then pass through the filter screen into the connecting pipe and finally into the mixing drum, achieving the optimal mixing ratio of the anti-cracking agent raw materials and thus improving the quality of the anti-cracking agent.

[0004] Regarding the aforementioned technologies, when grinding crack-resistant agents, large particles are crushed manually. However, due to worker fatigue, it is difficult to maintain a stable rotation speed and grinding force, which can easily cause the crack-resistant agent to agglomerate on the filter screen, clogging the mesh and hindering the screening process. This results in filter screen blockage and requires frequent manual cleaning. Utility Model Content

[0005] The purpose of this invention is to provide a fine grinding structure for the pretreatment of crack-resistant agent raw materials. By using this device, the problem of manually grinding large particles of crack-resistant agents is solved. Due to worker fatigue, it is difficult to maintain a stable rotation speed and grinding force, which easily causes the crack-resistant agent to agglomerate on the filter screen, clogging the mesh and making the screening process difficult. This results in the filter screen becoming clogged and requiring frequent manual cleaning.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fine grinding structure for pretreatment of crack-resistant agent raw materials, comprising a feeding box, a fine grinding device at the lower end of the feeding box, and a collecting device at the lower end of the fine grinding device. The feeding box includes a feeding hopper, a feeding pipe at the lower end of the feeding hopper, a filter screen hinged inside the feeding pipe, a discharge trough on one side of the feeding pipe, a baffle fixedly installed on the outer side of the discharge trough, a partition fixedly installed inside the feeding pipe, a rotating rod rotatably mounted on the upper end of the partition, a fixed block rotatably mounted on one end of the rotating rod, and a rotating motor rotatably mounted on the other end of the rotating rod. The drive end of the rotating motor is fixedly connected to the rotating rod, and the outer shell of the rotating motor is fixedly connected to the feeding pipe. When the crack-resistant agent raw material needs to be finely ground, it is poured into the feed box and then into the feed pipe through the feed hopper. It undergoes preliminary filtration through a filter screen, retaining coarse particles. Fine particles are conveyed to the lower end through the feed pipe. The coarse particles retained on the filter screen are then rotated by starting a rotating motor, causing the fixed block to move away from the filter screen. This rotation of the filter screen discharges the coarse particles through a discharge chute into the fine grinding device at the lower end for further grinding. By separating coarse and fine particles, the grinding efficiency is accelerated, avoiding the increased energy consumption and decreased efficiency that occur when grinding both simultaneously. This also reduces the amount of coarse particles remaining on the filter screen, preventing clogging.

[0007] Preferably, a cover plate is slidably installed on the upper end of the feeding hopper, and a handle is fixedly installed on the upper end of the cover plate. A cam assembly is provided at the lower end of the filter screen. The cam assembly is located inside the feeding pipe. The cover plate is opened by the handle, and the crack-resistant agent raw material is poured into the feeding pipe for classification and grinding. After the filter screen filters the fine particles, it rotates. The cam assembly drives the filter screen to vibrate, and the coarse particles on the filter screen are discharged into the fine grinding device at the lower end for fine grinding.

[0008] Preferably, the cam assembly includes a second rotary motor, the housing of which is fixedly connected to the feed pipe. A connecting rod is fixedly installed on the drive end of the second rotary motor, and two sets of cams are fixedly installed on the outer side of the connecting rod. The end of the connecting rod away from the second rotary motor is rotatably connected to the feed pipe. When the filter screen rotates under the action of the rotating rod, the second rotary motor is started, which drives the two sets of cams to vibrate the filter screen up and down, discharging the coarse particles on the filter screen into the fine grinding device at the lower end for fine grinding.

[0009] Preferably, the fine grinding device includes a grinding box, a feeding box is fixedly installed on one side of the grinding box, and a protective shell is fixedly installed on one side of the grinding box. Coarse particles flowing down through the discharge trough are discharged into the grinding box for grinding, and fine particles discharged through the conveying pipe flow into the feeding box and then into the collection device.

[0010] Preferably, the protective shell has an L-shaped connecting plate inside, a rotating motor three is fixedly installed on the inner side of the L-shaped connecting plate, a grinding roller is fixedly installed on the drive end of the rotating motor three, a conveyor belt is rotatably installed on the outer side of the grinding roller, and three sets of grinding rollers are arranged on the inner side of the conveyor belt. The three sets of grinding rollers all penetrate the protective shell and are rotatably connected to the inner side of the protective shell. Two sets of guide plates one are fixedly installed inside the protective shell, located at the upper end of the three sets of grinding rollers. Two sets of guide plates two are fixedly installed inside the protective shell, located on both sides of the three sets of grinding rollers. When the coarse particles on the filter screen are discharged into the fine grinding device at the lower end, the rotating motor three is started to drive the grinding roller to rotate, which drives the conveyor belt to rotate, thus driving the three sets of grinding rollers to rotate. The coarse particles fall between two sets of grinding rollers through the two sets of guide plates one for grinding, and the two sets of guide plates two restrict the coarse particles, so that the coarse particles are always kept between the three sets of grinding rollers for grinding. The ground anti-cracking agent raw material is discharged into the collection device for storage.

[0011] Preferably, the collecting device includes a collecting shell, with a feeding trough 1 at the upper end of the collecting shell. The feeding trough 1 matches and communicates with the inside of the feeding box. The collecting shell also has a feeding trough 2 at the upper end, which matches and communicates with the inside of the grinding box. A collecting box is slidably installed inside the collecting shell. Fine particles discharged from the conveying pipe flow into the collecting box through the feeding trough 1, and raw materials ground by the three sets of grinding rollers are discharged into the collecting box through the feeding trough 2 for unified collection and processing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model proposes a fine grinding structure for the pretreatment of crack-resistant agent raw materials. When fine grinding of crack-resistant agent raw materials is required, the raw materials are poured into a feeding box and fed into a feeding pipe through a feeding hopper. They undergo preliminary filtration through a filter screen, retaining coarse particles. Fine particles are conveyed to the lower end through the feeding pipe. The coarse particles retained on the filter screen are then rotated by starting a rotating motor, causing the fixed block to move away from the filter screen, thus rotating the filter screen. The coarse particles are discharged through a discharge chute into the fine grinding device at the lower end for fine grinding. By separating coarse and fine particles, the grinding efficiency is accelerated, avoiding the increased energy consumption and decreased efficiency when grinding coarse and fine particles simultaneously. This also reduces the amount of coarse particles remaining on the filter screen, preventing clogging. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the material conveying box of this utility model;

[0016] Figure 3 This is a schematic diagram of the planar structure of the material conveying box of this utility model;

[0017] Figure 4 This is a schematic diagram of the rotating rod and cam assembly structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the precision grinding device of this utility model;

[0019] Figure 6 This is a schematic diagram of the outer structure of the fine grinding device and the collecting device of this utility model;

[0020] Figure 7 This is a schematic diagram of the internal structure of the grinding box of this utility model;

[0021] Figure 8 This is a schematic diagram of the collection device structure of this utility model.

[0022] In the diagram: 1. Feeding box; 11. Feeding hopper; 12. Cover plate; 13. Handle; 14. Feeding pipe; 141. Discharge chute; 142. Baffle; 143. Partition plate; 144. Rotary motor one; 145. Rotating rod; 146. Fixing block; 15. Filter screen; 16. Cam assembly; 161. Rotary motor two; 162. Connecting rod; 163. Cam; 2. Fine grinding device; 21. Grinding box; 211. Protective shell; 212. L-shaped connecting plate; 213. Rotary motor three; 214. Conveyor belt; 215. Grinding roller; 216. Guide plate one; 217. Guide plate two; 22. Feeding box; 3. Collection device; 31. Collection shell; 311. Feed chute one; 312. Feed chute two; 32. Collection box. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0025] Combination Figures 1-4A fine grinding structure for pretreatment of crack-resistant agent raw materials includes a feeding box 1, a fine grinding device 2 at the lower end of the feeding box 1, and a collecting device 3 at the lower end of the fine grinding device 2. The feeding box 1 includes a feeding hopper 11, a feeding pipe 14 at the lower end of the feeding hopper 11, a filter screen 15 hinged inside the feeding pipe 14, a discharge trough 141 on one side of the feeding pipe 14, a baffle 142 fixedly installed on the outer side of the discharge trough 141, a partition 143 fixedly installed inside the feeding pipe 14, a rotating rod 145 rotatably mounted on the upper end of the partition 143, a fixing block 146 rotatably mounted on one end of the rotating rod 145, and a rotating motor 144 rotatably mounted on the other end of the rotating rod 145. The driving end of the rotating motor 144 is fixedly connected to the rotating rod 145, and the outer shell of the rotating motor 144 is connected to the feeding pipe 145. 4. Fixed connection: When the crack-resistant agent raw material needs to be finely ground, the crack-resistant agent raw material is poured into the feeding box 1, and enters the feeding pipe 14 through the feeding hopper 11. It is initially filtered through the filter screen 15, and the coarse particles of the crack-resistant agent raw material are retained on the filter screen 15. The fine material is transported to the lower end through the feeding pipe 14. The coarse particles retained on the filter screen 15 are rotated by starting the rotating motor 144, which drives the rotating rod 145 to rotate, so that the fixed block 146 moves away from the filter screen 15, thereby causing the filter screen 15 to rotate. The coarse particles are discharged through the discharge chute 141 into the fine grinding device 2 at the lower end for fine grinding. By separating the coarse and fine particles, the grinding efficiency is accelerated, and the energy consumption and efficiency will be reduced when coarse and fine particles are ground at the same time. This also reduces the amount of coarse particles remaining on the filter screen 15 and causing blockage on the filter screen 15.

[0026] Combination Figure 2 A cover plate 12 is slidably installed on the upper end of the feeding hopper 11, and a handle 13 is fixedly installed on the upper end of the cover plate 12. A cam assembly 16 is provided at the lower end of the filter screen 15. The cam assembly 16 is located inside the feeding pipe 14. The cover plate 12 is opened by the handle 13, and the crack-resistant agent raw material is poured into the feeding pipe 14 for classification and grinding. After the filter screen 15 filters the fine particles, it rotates. The cam assembly 16 drives the filter screen 15 to vibrate, and the coarse particles on the filter screen 15 are discharged into the fine grinding device 2 at the lower end for fine grinding.

[0027] Combination Figure 2 , Figure 4 The cam assembly 16 includes a second rotary motor 161. The housing of the second rotary motor 161 is fixedly connected to the feed pipe 14. A connecting rod 162 is fixedly installed on the drive end of the second rotary motor 161. Two sets of cams 163 are fixedly installed on the outer side of the connecting rod 162. The end of the connecting rod 162 away from the second rotary motor 161 is rotatably connected to the feed pipe 14. When the filter screen 15 rotates under the action of the rotating rod 145, the second rotary motor 161 is started, which drives the two sets of cams 163 to vibrate the filter screen 15 up and down, and discharges the coarse particles on the filter screen 15 into the fine grinding device 2 at the lower end for fine grinding.

[0028] Combination Figure 1 , Figure 5 The fine grinding device 2 includes a grinding box 21, a feeding box 22 is fixedly installed on one side of the grinding box 21, and a protective shell 211 is fixedly installed on one side of the grinding box 21. Coarse particles flowing down through the discharge trough are discharged into the grinding box 21 for grinding, and fine particles discharged through the conveying pipe 14 flow into the feeding box 22 and then enter the collection device 3.

[0029] Combination Figures 5-7 The protective housing 211 has an L-shaped connecting plate 212 inside. A rotating motor 213 is fixedly installed on the inner side of the L-shaped connecting plate 212. A grinding roller 215 is fixedly installed on the drive end of the rotating motor 213. A conveyor belt 214 is rotatably installed on the outer side of the grinding roller 215. Three sets of grinding rollers 215 are arranged on the inner side of the conveyor belt 214. All three sets of grinding rollers 215 penetrate the protective housing 211 and are rotatably connected to the inner side of the protective housing 211. Two sets of guide plates 216 are fixedly installed inside the protective housing 211. The guide plates 216 are located at the upper end of the three sets of grinding rollers 215. Equipped with two sets of guide plates 217, which are located on both sides of the three grinding rollers 215, when the coarse particles on the filter screen 15 are discharged into the fine grinding device 2 at the lower end, the grinding rollers 215 are rotated by starting the rotating motor 213. The grinding rollers 215 drive the conveyor belt 214 to rotate, which in turn drives the three grinding rollers 215 to rotate. The coarse particles fall between two of the grinding rollers 215 through the two sets of guide plates 216 for grinding. The coarse particles are restricted by the two sets of guide plates 217, so that the coarse particles are always kept between the three grinding rollers 215 for grinding. The ground crack-resistant agent raw material is discharged into the collection device 3 for storage.

[0030] Combination Figure 1 , Figure 8 The collection device 3 includes a collection shell 31. The upper end of the collection shell 31 is provided with a feed trough 311, which is matched with and connected to the feed box 22. The upper end of the collection shell 31 is provided with a feed trough 312, which is matched with and connected to the grinding box 21. A collection box 32 is slidably installed inside the collection shell 31. Fine particles discharged from the feed pipe 14 flow into the collection box 32 through the feed trough 311. Raw materials ground by the three sets of grinding rollers 215 are discharged into the collection box 32 through the feed trough 312 for unified collection and processing.

[0031] Working principle: The crack-resistant agent raw material is poured into the feeding hopper 11 and enters the feeding pipe 14. After preliminary screening by the filter screen 15, the fine material passes through the filter screen 15 and is conveyed downward. The coarse material is driven by the rotating rod 145 driven by the rotating motor 144 and then discharged into the fine grinding device 2 through the discharge chute 141. At the same time, the rotating motor 161 drives the cam 163 on the connecting rod 162 to vibrate the filter screen 15 to assist in the discharge. The coarse particles entering the fine grinding device 2 are ground by the rotating motor 213 driving the grinding roller 215 and the conveyor belt 214 to rotate. With the help of the guide plate 216 and the guide plate 217, they are restricted between the three sets of grinding rollers 215 for grinding. The ground raw material and the fine material from the feeding pipe 14 are discharged into the collection box 32 of the collection device 3 through the feed chute 212 and the feed chute 311 for unified collection and processing.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine grinding structure for pretreatment of crack-resistant agent raw materials, comprising a feeding box (1), a fine grinding device (2) disposed at the lower end of the feeding box (1), and a collecting device (3) disposed at the lower end of the fine grinding device (2), characterized in that: The feeding box (1) includes a feeding hopper (11), a feeding pipe (14) is provided at the lower end of the feeding hopper (11), a filter screen (15) is installed inside the feeding pipe (14) with a hinge, a discharge trough (141) is provided on one side of the feeding pipe (14), a baffle (142) is fixedly installed on the outside of the discharge trough (141), a partition (143) is fixedly installed inside the feeding pipe (14), a rotating rod (145) is rotatably installed at the upper end of the partition (143), a fixing block (146) is rotatably installed at one end of the rotating rod (145), a rotating motor (144) is rotatably installed at the other end of the rotating rod (145), the driving end of the rotating motor (144) is fixedly connected to the rotating rod (145), and the outer shell of the rotating motor (144) is fixedly connected to the feeding pipe (14).

2. A refiner structure for pre-treatment of anti- cracking agent raw material according to claim 1, characterized in that: The upper end of the feeding hopper (11) is slidably fitted with a cover plate (12), and the upper end of the cover plate (12) is fixedly fitted with a handle (13). The lower end of the filter screen (15) is provided with a cam assembly (16), which is located inside the feeding pipe (14).

3. A refiner structure for pre-treatment of anti- cracking agent raw material according to claim 2, characterized in that: The cam assembly (16) includes a second rotary motor (161), the outer shell of the second rotary motor (161) is fixedly connected to the feed pipe (14), a connecting rod (162) is fixedly installed on the drive end of the second rotary motor (161), two sets of cams (163) are fixedly installed on the outer side of the connecting rod (162), and the end of the connecting rod (162) away from the second rotary motor (161) is rotatably connected to the feed pipe (14).

4. A refiner structure for pre-treatment of anti- cracking agent raw material according to claim 1, characterized in that: The fine grinding device (2) includes a grinding box (21), a feeding box (22) is fixedly installed on one side of the grinding box (21), and a protective shell (211) is fixedly installed on one side of the grinding box (21).

5. A refiner structure for pre-treatment of anti- cracking agent raw material according to claim 4, characterized in that: The protective shell (211) is provided with an L-shaped connecting plate (212) inside. A rotating motor (213) is fixedly installed on the inner side of the L-shaped connecting plate (212). A grinding roller (215) is fixedly installed on the driving end of the rotating motor (213). A conveyor belt (214) is rotatably installed on the outer side of the grinding roller (215). A total of three sets of grinding rollers (215) are provided on the inner side of the conveyor belt (214). All three sets of grinding rollers (215) penetrate the protective shell (211) and are rotatably connected to the inner side of the protective shell (211). Two sets of guide plates (216) are fixedly installed inside the protective shell (211). The guide plates (216) are located at the upper end of the three sets of grinding rollers (215). Two sets of guide plates (217) are fixedly installed inside the protective shell (211). The two sets of guide plates (217) are located on both sides of the three sets of grinding rollers (215).

6. A refiner structure for pre-treatment of anti- cracking agent raw material according to claim 1, characterized in that: The collecting device (3) includes a collecting shell (31), with a feeding trough (311) at the upper end of the collecting shell (31). The feeding trough (311) matches the feeding box (22) and is connected to its interior. The collecting shell (31) has a feeding trough (312) at the upper end of the collecting shell (31), which matches the grinding box (21) and is connected to its interior. A collecting box (32) is slidably installed inside the collecting shell (31).

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