Concrete raw material classification conveyor

Abstract

The utility model relates to the field of conveyors, in particular to a concrete raw material classifying conveyor which comprises a discharging hopper. A discharging mechanism is arranged at the lower end of the discharging hopper, supporting arms are fixedly connected to the two sides of the discharging hopper, and the upper ends of the two supporting arms are jointly and fixedly connected with a first U-shaped plate. Materials are placed in the measuring frame, the materials can be borne by the upper end of the discharging plate, the size of the materials can be rapidly judged through scale marks on the inner wall of the measuring frame, and therefore the size of the materials can be rapidly confirmed conveniently, then a fourth air cylinder is started firstly to enable a lifting block to move upwards, and the lifting block drives the measuring frame to move upwards; then an electric cylinder is started to enable an output shaft of the electric cylinder to retract into a cylinder body of the electric cylinder, so that a discharging plate is inclined, the discharging plate can rotate along a hinge point of a U-shaped block, materials located at the upper end of the discharging plate can fall into a second U-shaped plate due to inclination of the discharging plate, the discharging plate is vibrated by starting a vibrator, and the materials are discharged from the second U-shaped plate; and the materials can be prevented from being adhered to the blanking plate.

Description

Technical Field

[0001] The utility model belongs to the field of conveyors, and in particular relates to a concrete raw material classification conveyor. Background Art

[0002] In modern construction, concrete is an indispensable building material, and its quality directly affects the quality and safety of the building. Concrete materials are usually composed of cement, aggregates (such as sand and gravel), water and other additives. In order to ensure the quality of concrete, these raw materials need to be precisely controlled and classified.

[0003] At present, various raw materials for concrete have been classified when they enter the factory. However, in the production formula of concrete, the proportion of various raw materials needs to be precisely controlled. Classified transportation can ensure that each raw material is accurately measured and transported to the mixing mechanism according to the formula requirements to ensure the quality of concrete. However, when using existing classified conveyors, it is not convenient to quickly classify and transport different kinds of raw materials after determining the volume. It is also difficult to prevent the raw materials from adhering to the discharge port during the classified transportation process, which needs further improvement.

[0004] Therefore, a concrete raw material classification conveyor is proposed, which is convenient for quickly classifying and conveying different kinds of raw materials after determining the volume, and the raw materials can be prevented from adhering to the discharge port during the classification and conveying process. Utility Model Content

[0005] In order to overcome the problem that the existing classification conveyor is inconvenient to quickly classify and convey different kinds of raw materials after determining the volume, and it is difficult to prevent the raw materials from adhering to the discharge port during the classification and conveying process, a concrete raw material classification conveyor is proposed.

[0006] The technical scheme of the utility model is as follows: a concrete raw material classification conveyor comprises a lower hopper; a discharging mechanism is arranged at the lower end of the lower hopper, support arms are fixedly connected to both sides of the lower hopper, and the upper ends of the two support arms are commonly fixedly connected to a first U-shaped plate, the first fixing plate is fixedly connected to the inner wall of the first U-shaped plate near the two side edges, the first fixing plate is fixedly connected to the second cylinder at one end away from the center of the first U-shaped plate, the output shaft of the second cylinder passes through the first fixing plate and is fixedly connected to the second pushing block, and the upper end of the first U-shaped plate is provided with two grooves, the inner wall of the groove is fixedly connected to the second U-shaped plate, limiting grooves are penetrated and arranged on both sides of the second U-shaped plate, the limiting grooves and the spaces at the recesses of the first U-shaped plate are communicated with each other, the inner wall of the second U-shaped plate is fixedly connected to the second fixing plate near the two end edges, the second fixing plate is fixedly connected to the third cylinder at one end away from the center of the second U-shaped plate, the output shaft of the third cylinder passes through the second fixing plate and is fixedly connected to the third pushing block, and a discharging mechanism is arranged at the lower end of the first U-shaped plate;

[0007] The second U-shaped plate includes a bearing block, a U-shaped block, a rotating block, a blanking plate, a vibrator, an electric cylinder and a measuring frame; bearing blocks are fixedly connected to the inner walls on both sides of the second U-shaped plate, a U-shaped block is fixedly connected to the upper end of the bearing block, rotating blocks are rotatably installed on the inner walls on both sides of the U-shaped block, a blanking plate is fixedly connected to the upper end of the rotating block, a vibrator is fixedly arranged inside the blanking plate, an electric cylinder is hingedly connected to the lower part of one end of the U-shaped block close to the center of the second U-shaped plate, the upper end of the output shaft of the electric cylinder is hinged to the lower end of the blanking plate, a fourth cylinder is fixedly connected to the side wall of the second U-shaped plate, a lifting block is fixedly connected to the upper end of the output shaft of the fourth cylinder, a measuring frame is fixedly connected to the side wall of the lifting block, two sides of the measuring frame are fitted with both sides of the inner wall of the second U-shaped plate, the side wall of the vibrator is fitted with the lower part of the side wall of the measuring frame, and scale lines are arranged on the inner wall of the measuring frame.

[0008] Preferably, when in use, the material is placed in the measuring frame, and the material will be carried by the upper end of the blanking plate. The volume of the material can be quickly judged by the scale lines on the inner wall of the measuring frame, thereby facilitating quick confirmation of the volume of the material, and then the fourth cylinder is turned on to move the lifting block upward, and the lifting block drives the measuring frame to move upward, and then the electric cylinder is turned on to retract the output shaft of the electric cylinder into the cylinder body of the electric cylinder, so that the blanking plate is tilted, and the blanking plate will rotate along the hinge point of the U-shaped block, and the material located at the upper end of the blanking plate will fall into the inside of the second U-shaped plate due to the tilt of the blanking plate, and then the vibrator is turned on to vibrate the blanking plate, which can prevent The material adheres to the unloading plate, and the material first falls into the second U-shaped plate. Then the third cylinder is turned on to make the third push block move toward the center of the second U-shaped plate, pushing the material to the center of the second U-shaped plate. Then the second cylinder is turned on to make the second push block push the material located at the center of the second U-shaped plate to the middle of the first U-shaped plate. The material can enter the unloading hopper through the unloading mechanism, and then enter the discharging mechanism from the unloading hopper and move out from the discharging mechanism to complete the unloading. This solves the problem that the existing classification conveyor is not convenient for quickly classifying and conveying different kinds of raw materials after determining the volume when in use, and it is difficult to prevent the raw materials from adhering to the unloading port during the classification and conveying process.

[0009] Preferably, two ends of the second push block fit with two ends of the inner wall of the first U-shaped plate, and a bottom surface of the second push block fits with a bottom surface of the inner wall of the first U-shaped plate.

[0010] Preferably, the third push block is slidably disposed on both sides of the inner wall of the second U-shaped plate, and the bottom surface of the third push block is in contact with the bottom surface of the inner wall of the second U-shaped plate.

[0011] Preferably, two groups of positioning parts are fixedly connected to both sides of the inner wall of the second U-shaped plate, and each group of positioning parts includes two limit plates, and both sides of the limit plates are fixedly connected to both sides of the inner wall of the second U-shaped plate, and the ends of the two limit plates in a positioning part that are close to each other are fitted with the two ends of the measuring frame.

[0012] Preferably, the unloading mechanism includes a fixed cylinder, a carrying ring and a vibrator; the fixed cylinder is fixedly connected to the middle of the lower end of the second U-shaped plate, the carrying ring is fixedly connected to the lower part of the side wall of the fixed cylinder, and the upper end of the carrying ring is fixedly connected to two vibrators.

[0013] Preferably, the discharging mechanism includes a lower arc block, a supporting block, an upper arc block and a feed frame; the lower arc block is placed below the lower hopper, the side walls of the lower arc block are fixedly connected to two supporting blocks, the upper end of the lower arc block is fixedly connected to the upper arc block by bolts, the upper end of the upper arc block is fixedly connected to the feed frame in a through-type manner, and the upper end of the feed frame is fixedly connected to the lower end of the discharge port of the lower hopper.

[0014] Preferably, the discharging mechanism also includes a fixed plate, a first cylinder and a first push block; the inner wall of the lower arc block is fixedly connected to the fixed plate, the end of the fixed plate away from the center of the upper arc block is fixedly connected to the first cylinder, the output shaft of the first cylinder passes through the fixed plate and is fixedly connected to the first push block, a cylindrical groove body is formed inside the lower arc block and the upper arc block, and the side wall of the first push block is slidably arranged on the inner wall of the structure formed by the lower arc block and the upper arc block.

[0015] The beneficial effects of the utility model are as follows: by placing the material in the measuring frame, the material will be carried by the upper end of the blanking plate, and the volume of the material can be quickly judged by the scale lines on the inner wall of the measuring frame, thereby facilitating the rapid confirmation of the volume of the material, and then the fourth cylinder is first turned on to move the lifting block upward, and the lifting block drives the measuring frame to move upward, and then the electric cylinder is turned on to retract the output shaft of the electric cylinder into the cylinder body of the electric cylinder, so that the blanking plate is tilted, and the blanking plate will rotate along the hinge point of the U-shaped block, and the material located at the upper end of the blanking plate will fall into the inside of the second U-shaped plate due to the tilt of the blanking plate, and then the vibrator is turned on to vibrate the blanking plate, which can be To prevent materials from adhering to the unloading plate, the materials first fall into the second U-shaped plate, and then the third cylinder is turned on to make the third push block move toward the center of the second U-shaped plate, pushing the materials to the center of the second U-shaped plate, and then the second cylinder is turned on to make the second push block push the materials located at the center of the second U-shaped plate to the middle of the first U-shaped plate, and then the materials can enter the unloading hopper through the unloading mechanism, and then enter the discharging mechanism from the unloading hopper and move out from the discharging mechanism to complete the unloading. This solves the problem that the existing classification conveyor is not convenient for quickly classifying and conveying different kinds of raw materials after determining the volume when in use, and it is difficult to prevent the raw materials from adhering to the unloading port during the classification and conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a concrete raw material classification conveyor of the utility model;

[0017] Figure 2 What is shown is a schematic diagram of a three-dimensional cross-sectional structure of a second U-shaped plate of a concrete raw material classification conveyor of the utility model;

[0018] Figure 3 What is shown is a three-dimensional structural schematic diagram of a material discharge mechanism of a concrete raw material classification conveyor of the utility model;

[0019] Figure 4 Shown is a three-dimensional structural schematic diagram of a fourth cylinder of a concrete raw material classification conveyor of the utility model;

[0020] Figure 5 What is shown is a three-dimensional structural schematic diagram of a discharging mechanism of a concrete raw material classification conveyor of the utility model;

[0021] Figure 6 What is shown is a three-dimensional structural schematic diagram of a first push block of a concrete raw material classification conveyor of the utility model;

[0022] Figure 7 What is shown is a three-dimensional structural schematic diagram of a fixed cylinder of a concrete raw material classification conveyor of the utility model.

[0023] The markings in the attached drawings are: 1. lower hopper; 2. discharging mechanism; 201. lower arc block; 202. support block; 203. upper arc block; 204. feed frame; 205. fixed plate; 206. first cylinder; 207. first push block; 3. support arm; 4. first U-shaped plate; 5. first fixed plate; 6. second cylinder; 7. second push block; 8. groove; 9. second U-shaped plate; 901. bearing block; 902. U-shaped block; 903. rotating block; 904. lowering plate; 905. vibrator; 906. electric cylinder; 907. measuring frame; 10. second fixed plate; 11. third cylinder; 12. third push block; 13. fourth cylinder; 14. lifting block; 15. limit plate; 16. fixed cylinder; 17. bearing ring; 18. vibrator; 19. limit groove. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] See also Figure 1-Figure 7The utility model provides an embodiment: a concrete raw material classification conveyor, comprising a lower hopper 1; a discharging mechanism 2 is arranged at the lower end of the lower hopper 1, both sides of the lower hopper 1 are fixedly connected with support arms 3, the upper ends of the two support arms 3 are commonly fixedly connected with a first U-shaped plate 4, the inner wall of the first U-shaped plate 4 is fixedly connected with a first fixing plate 5 near the edges of both sides, the end of the first fixing plate 5 away from the center of the first U-shaped plate 4 is fixedly connected with a second cylinder 6, the output shaft of the second cylinder 6 passes through the first fixing plate 5 and is fixedly connected with a second push block 7, the first U-shaped Two grooves 8 are provided at the upper end of the plate 4, and a second U-shaped plate 9 is fixedly connected to the inner wall of the groove 8. Limiting grooves 19 are provided on both sides of the second U-shaped plate 9, and the limiting grooves 19 are communicated with the space at the concave part of the first U-shaped plate 4. A second fixing plate 10 is fixedly connected to the inner wall of the second U-shaped plate 9 near both ends of the edge, and a third cylinder 11 is fixedly connected to one end of the second fixing plate 10 away from the center of the second U-shaped plate 9. The output shaft of the third cylinder 11 passes through the second fixing plate 10 and is fixedly connected to a third push block 12. A feeding mechanism is provided at the lower end of the first U-shaped plate 4;

[0026] The second U-shaped plate 9 includes a bearing block 901, a U-shaped block 902, a rotating block 903, a blanking plate 904, a vibrator 905, an electric cylinder 906 and a measuring frame 907; the inner walls on both sides of the second U-shaped plate 9 are fixedly connected to the bearing blocks 901, the upper end of the bearing block 901 is fixedly connected to the U-shaped block 902, the inner walls on both sides of the U-shaped block 902 are rotatably installed with rotating blocks 903, the upper end of the rotating block 903 is fixedly connected to the blanking plate 904, the inside of the blanking plate 904 is fixedly provided with a vibrator 905, the U-shaped block 902 is close to the first An electric cylinder 906 is hinged at the lower part of one end of the center of the second U-shaped plate 9, and the upper end of the output shaft of the electric cylinder 906 is hinged to the lower end of the blanking plate 904. The side wall of the second U-shaped plate 9 is fixedly connected to the fourth cylinder 13, and the upper end of the output shaft of the fourth cylinder 13 is fixedly connected to the lifting block 14. The side wall of the lifting block 14 is fixedly connected to the measuring frame 907, and the two sides of the measuring frame 907 are fitted with the two sides of the inner wall of the second U-shaped plate 9. The side wall of the vibrator 905 is fitted with the lower part of the side wall of the measuring frame 907, and the inner wall of the measuring frame 907 is provided with scale lines.

[0027] When in use, the material is placed in the measuring frame 907, and the material will be carried by the upper end of the blanking plate 904. The volume of the material can be quickly determined by the scale lines on the inner wall of the measuring frame 907, so as to facilitate the rapid confirmation of the volume of the material. Then, the fourth air cylinder 13 is first turned on to move the lifting block 14 upward, and the lifting block 14 drives the measuring frame 907 to move upward. Then, the electric cylinder 906 is turned on to retract the output shaft of the electric cylinder 906 into the cylinder body of the electric cylinder 906, so that the blanking plate 904 is tilted, and the blanking plate 904 will rotate along the hinge point of the U-shaped block 902, and the material at the upper end of the blanking plate 904 will be tilted by the blanking plate 90 4 is tilted and falls into the interior of the second U-shaped plate 9, and then the vibrator 905 is turned on to make the unloading plate 904 vibrate, which can prevent the material from adhering to the unloading plate 904. The material first falls into the second U-shaped plate 9, and then the third cylinder 11 is turned on to make the third push block 12 move toward the center of the second U-shaped plate 9, pushing the material to the center of the second U-shaped plate 9, and then the second cylinder 6 is turned on to make the second push block 7 push the material located at the center of the second U-shaped plate 9 to the middle of the first U-shaped plate 4, and then enter the unloading hopper 1 through the unloading mechanism, and then enter the discharging mechanism 2 from the unloading hopper 1, and move out from the discharging mechanism 2 to complete the unloading.

[0028] See also Figure 1 In this embodiment, the two ends of the second push block 7 are in contact with the two ends of the inner wall of the first U-shaped plate 4, and the bottom surface of the second push block 7 is in contact with the bottom surface of the inner wall of the first U-shaped plate 4, which is beneficial for the second push block 7 to quickly push the material falling into the first U-shaped plate 4 to the middle of the first U-shaped plate 4.

[0029] See also Figure 1 and Figure 2 In this embodiment, the third push block 12 is slidably arranged on both sides of the inner wall of the second U-shaped plate 9, and the bottom surface of the third push block 12 is in contact with the bottom surface of the inner wall of the second U-shaped plate 9, so that the material falling into the second U-shaped plate 9 can be quickly pushed to the middle area of ​​the second U-shaped plate 9.

[0030] See also Figure 1 , Figure 3 and Figure 4 In this embodiment, two groups of positioning members are fixedly connected to the two sides of the inner wall of the second U-shaped plate 9, and each group of positioning members includes two limit plates 15. The two sides of the limit plates 15 are fixedly connected to the two sides of the inner wall of the second U-shaped plate 9, and the ends of the two limit plates 15 in a positioning member that are close to each other are fitted with the two ends of the measuring frame 907. The two sides of the measuring frame 907 are limited by the two sides of the inner wall of the second U-shaped plate 9, and the two ends of the measuring frame 907 are limited by the ends of the two limit plates 15 in a positioning member that are close to each other, thereby facilitating the stable movement of the measuring frame 907 in the vertical direction.

[0031] See also Figure 1 and Figure 7In this embodiment, the unloading mechanism includes a fixed cylinder 16, a carrying ring 17 and a vibrator 18; the fixed cylinder 16 is fixedly connected to the middle of the lower end of the second U-shaped plate 9, the carrying ring 17 is fixedly connected to the lower part of the side wall of the fixed cylinder 16, and the upper end of the carrying ring 17 is fixedly connected to two vibrators 18. The raw materials falling into the second U-shaped plate 9 will be pushed to the fixed cylinder 16 by the two second push blocks 7 and fall downward. Turning on the vibrator 18 makes the carrying ring 17 and the fixed cylinder 16 vibrate, which can prevent the raw materials from adhering to the fixed cylinder 16.

[0032] See also Figure 1 , Figure 5 and Figure 6 In this embodiment, the discharging mechanism 2 includes a lower arc block 201, a support block 202, an upper arc block 203 and a feed frame 204; the lower arc block 201 is placed below the lower hopper 1, and the side wall of the lower arc block 201 is fixedly connected to two support blocks 202, the upper end of the lower arc block 201 is bolted with an upper arc block 203, and the upper end of the upper arc block 203 is through-fixed with a feed frame 204, and the upper end of the feed frame 204 is fixedly connected to the lower end of the discharge port of the lower hopper 1, and the material entering the lower hopper 1 will pass through the feed frame 204 and the upper arc block 203 into the interior of the lower arc block 201.

[0033] See also Figure 1 , Figure 5 and Figure 6 In this embodiment, the discharging mechanism 2 also includes a fixed disk 205, a first cylinder 206 and a first push block 207; the inner wall of the lower arc block 201 is fixedly connected with the fixed disk 205, and one end of the fixed disk 205 away from the center of the upper arc block 203 is fixedly connected with the first cylinder 206, and the output shaft of the first cylinder 206 passes through the fixed disk 205 and is fixedly connected with the first push block 207, and the interior of the lower arc block 201 and the upper arc block 203 forms a cylindrical trough body, and the side wall of the first push block 207 is slidably arranged on the inner wall of the structure formed by the lower arc block 201 and the upper arc block 203. When the first cylinder 206 is turned on to move the first push block 207, the material falling into the lower arc block 201 can be quickly pushed out.

[0034] Working principle: First, place the material in the measuring frame 907, and the material will be carried by the upper end of the unloading plate 904. The volume of the material can be quickly determined by the scale lines on the inner wall of the measuring frame 907, so as to facilitate the rapid confirmation of the volume of the material;

[0035] Then, the fourth cylinder 13 is turned on to move the lifting block 14 upward, and the lifting block 14 drives the measuring frame 907 to move upward;

[0036] Then, the electric cylinder 906 is turned on so that the output shaft of the electric cylinder 906 is retracted into the cylinder body of the electric cylinder 906, so that the blanking plate 904 is tilted, and the blanking plate 904 rotates along the hinge point of the U-shaped block 902, and the material at the upper end of the blanking plate 904 falls into the interior of the second U-shaped plate 9 due to the tilt of the blanking plate 904;

[0037] Then, the vibrator 905 is turned on to vibrate the blanking plate 904 to prevent the material from adhering to the blanking plate 904;

[0038] The material first falls into the second U-shaped plate 9, and then the third cylinder 11 is turned on to make the third push block 12 move toward the center of the second U-shaped plate 9, pushing the material to the center of the second U-shaped plate 9;

[0039] Next, the second cylinder 6 is turned on so that the second push block 7 pushes the material located at the center of the second U-shaped plate 9 to the middle of the first U-shaped plate 4. The material will be pushed to the fixed cylinder 16 by the two second push blocks 7 and fall downward. The vibrator 18 is turned on so that the carrying ring 17 and the fixed cylinder 16 vibrate to prevent the raw material from adhering to the fixed cylinder 16.

[0040] The material entering the lower hopper 1 will enter the lower arc block 201 through the feed frame 204 and the upper arc block 203. Finally, the first cylinder 206 is turned on to move the first push block 207, so that the material falling into the lower arc block 201 can be quickly pushed out.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A concrete raw material classification conveyor, comprising a lower hopper (1); characterized in that: A discharging mechanism (2) is provided at the lower end of the lower hopper (1), support arms (3) are fixedly connected to both sides of the lower hopper (1), the upper ends of the two support arms (3) are commonly fixedly connected to a first U-shaped plate (4), first fixing plates (5) are fixedly connected to the inner wall of the first U-shaped plate (4) near both side edges, a second cylinder (6) is fixedly connected to one end of the first fixing plate (5) away from the center of the first U-shaped plate (4), an output shaft of the second cylinder (6) passes through the first fixing plate (5) and is fixedly connected to a second push block (7), and two grooves (8) are provided at the upper end of the first U-shaped plate (4), the grooves ( The inner wall of the second U-shaped plate (8) is fixedly connected to a second U-shaped plate (9), and limiting grooves (19) are provided on both sides of the second U-shaped plate (9), and the limiting grooves (19) and the space at the recess of the first U-shaped plate (4) are interconnected. The inner wall of the second U-shaped plate (9) is fixedly connected to a second fixing plate (10) near both ends of the edge, and the end of the second fixing plate (10) away from the center of the second U-shaped plate (9) is fixedly connected to a third cylinder (11), and the output shaft of the third cylinder (11) passes through the second fixing plate (10) and is fixedly connected to a third push block (12), and a feeding mechanism is provided at the lower end of the first U-shaped plate (4); The second U-shaped plate (9) comprises a bearing block (901), a U-shaped block (902), a rotating block (903), a blanking plate (904), a vibrator (905), an electric cylinder (906) and a measuring frame (907); the bearing blocks (901) are fixedly connected to the inner walls on both sides of the second U-shaped plate (9), the U-shaped block (902) is fixedly connected to the upper end of the bearing block (901), the rotating blocks (903) are rotatably mounted on the inner walls on both sides of the U-shaped block (902), the blanking plate (904) is fixedly connected to the upper end of the rotating block (903), the vibrator (905) is fixedly arranged inside the blanking plate (904), the U-shaped block (902 ... and the vibrator (905) is fixedly arranged inside the blanking plate (904). ) An electric cylinder (906) is hingedly connected to the lower part of one end close to the center of the second U-shaped plate (9), the upper end of the output shaft of the electric cylinder (906) is hingedly connected to the lower end of the blanking plate (904), the side wall of the second U-shaped plate (9) is fixedly connected to a fourth cylinder (13), the upper end of the output shaft of the fourth cylinder (13) is fixedly connected to a lifting block (14), the side wall of the lifting block (14) is fixedly connected to a measuring frame (907), the two sides of the measuring frame (907) are in contact with the two sides of the inner wall of the second U-shaped plate (9), the side wall of the vibrator (905) is in contact with the lower part of the side wall of the measuring frame (907), and the inner wall of the measuring frame (907) is provided with scale lines.

2. A concrete raw material classification conveyor according to claim 1, characterized in that: The two ends of the second push block (7) fit with the two ends of the inner wall of the first U-shaped plate (4), and the bottom surface of the second push block (7) fits with the bottom surface of the inner wall of the first U-shaped plate (4).

3. The concrete raw material classification conveyor according to claim 1, characterized in that: The third push block (12) is slidably arranged on both sides of the inner wall of the second U-shaped plate (9), and the bottom surface of the third push block (12) is in contact with the bottom surface of the inner wall of the second U-shaped plate (9).

4. The concrete raw material classification conveyor according to claim 1, characterized in that: Two groups of positioning members are fixedly connected to the inner wall of the second U-shaped plate (9), each group of positioning members comprises two limit plates (15), the two sides of the limit plates (15) are fixedly connected to the inner wall of the second U-shaped plate (9), and the ends of the two limit plates (15) in one positioning member that are close to each other are in contact with the two ends of the measuring frame (907).

5. The concrete raw material classification conveyor according to claim 1, characterized in that: The material discharge mechanism comprises a fixed cylinder (16), a bearing ring (17) and a vibrator (18); the fixed cylinder (16) is fixedly connected in a through-type manner to the middle of the lower end of the second U-shaped plate (9), the bearing ring (17) is fixedly connected to the lower part of the side wall of the fixed cylinder (16), and the upper end of the bearing ring (17) is fixedly connected to two vibrators (18).

6. The concrete raw material classification conveyor according to claim 1, characterized in that: The discharge mechanism (2) comprises a lower arc block (201), a support block (202), an upper arc block (203) and a feed frame (204); the lower arc block (201) is placed below the lower hopper (1); the side wall of the lower arc block (201) is fixedly connected to two support blocks (202); the upper end of the lower arc block (201) is fixedly connected to the upper arc block (203) by bolts; the upper end of the upper arc block (203) is fixedly connected to the feed frame (204) in a through-type manner; and the upper end of the feed frame (204) is fixedly connected to the lower end of the discharge port of the lower hopper (1).

7. The concrete raw material classification conveyor according to claim 1, characterized in that: The discharging mechanism (2) further comprises a fixed disk (205), a first cylinder (206) and a first push block (207); the inner wall of the lower arc block (201) is fixedly connected to the fixed disk (205); one end of the fixed disk (205) away from the center of the upper arc block (203) is fixedly connected to the first cylinder (206); an output shaft of the first cylinder (206) passes through the fixed disk (205) and is fixedly connected to the first push block (207); a cylindrical groove is formed inside the lower arc block (201) and the upper arc block (203); and a side wall of the first push block (207) is slidably arranged on the inner wall of the structure formed by the lower arc block (201) and the upper arc block (203).

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