Stone classified screening device for concrete

Abstract

The invention relates to the technical field of concrete mixing, and discloses a concrete stone grading and screening device which comprises a screening assembly and a mixing assembly, the screening assembly comprises a shell assembly and a grading and screening part, and the grading and screening part is installed in the shell assembly; the grading screening part comprises a screening drum, a screening plate and a conveying belt which are sequentially distributed from top to bottom, the stirring assembly comprises a stirring barrel and a rotating assembly, the stirring assembly is installed in the stirring barrel, and the discharging end of the screening plate is located over the stirring barrel. Stones needing to be screened are added into the feeding shell and enter the screen drum through the feeding shell, meanwhile, the first motor drives the screen drum to rotate through the shaft body, screen holes of the screen drum are larger than screen holes of the screen plate, no screen hole is formed in the conveying belt, the stones screened through the screen holes of the screen drum fall on the screen plate, and the screening efficiency is improved. And stones sieved by sieve holes of the sieve plate fall on the conveying belt and are sent out to fall into the stirring device.

Description

Technical Field

[0001] The invention relates to the technical field of concrete mixing, in particular to a stone grading and screening device for concrete. Background Art

[0002] Concrete is a general term for an engineering composite material in which aggregates are bonded together by a cementitious material. It usually refers to cement concrete, which is made by mixing cement as a cementitious material, sand and stone as aggregates, and water in a certain proportion. It is also called ordinary concrete. It is the most widely used and largest-volume building material in civil engineering, and therefore has good development prospects.

[0003] The construction site places the screened stones in a mixing barrel for mixing to make concrete for construction. The existing screening structure and mixing structure are separate. During the processing, the screened stones need to be transported to the mixing device again, which is not conducive to the mixing process. Summary of the invention

[0004] The object of the present invention is to provide a stone grading and screening device for concrete to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a stone grading and screening device for concrete, comprising: A screening assembly comprises a housing assembly and a grading screening part, wherein the grading screening part is installed inside the housing assembly; The grading and screening section comprises a screen drum, a screen plate and a conveyor belt which are sequentially arranged from top to bottom; A stirring assembly, comprising a stirring barrel and a rotating assembly, wherein the stirring barrel is provided with the stirring assembly; The discharging end of the sieve plate is located directly above the mixing barrel; The stones that need to be screened are added to the inside of the feed shell, and the stones that need to be screened enter the inside of the screen drum through the feed shell. At the same time, the first motor drives the screen drum to rotate through the shaft. The sieve holes of the screen drum are larger than the sieve holes of the sieve plate. There are no sieve holes on the conveyor belt. The stones sieved through the sieve holes of the sieve drum fall on the sieve plate, and the stones sieved through the sieve holes of the sieve plate fall on the conveyor belt and are sent out.

[0006] Furthermore, the shell assembly is mounted on a base frame, and the base frame is mounted above the mixing barrel, and the height of the base frame is adjusted according to the height of the mixing barrel.

[0007] Further, the shell assembly includes two parallel side plates, the two side plates are respectively provided with a vertically distributed first end cover and a second end cover, the top ends of the two side plates are provided with an upper shell, the second end cover is provided with a circular groove, the second end cover is provided with a feed shell connected with the circular groove, the feed port of the feed shell opens upward, and the circular groove is connected with the screen drum; The bottom sides of the first end cover and the side panels in the shell assembly are installed on the upper surface of the base frame, and the first end cover and the side panels are vertically distributed. Two first end covers and two side panels are provided, and the first end covers and the side panels are spliced ​​at intervals. The assembled first end covers and side panels form a rectangular frame, and the upper port of the rectangular frame is closed by the upper shell. The splicing structure is convenient for replacing vulnerable parts.

[0008] Furthermore, brackets are provided at both ends of the screen drum, and the screen drum is sleeved on the shaft body through the brackets. The two ends of the shaft body are respectively installed on the feed shell and the first end cover. A first motor connected to the shaft body is installed on the outer surface of the first end cover. A discharge port is provided on the first end cover, and the discharge port is connected to the discharge end of the screen drum. During the operation, the first motor drives the screen drum to rotate through the shaft, and the upright column of the bracket is composed of an inclined plate body. The rotating inclined plate body pushes the stone into the interior of the screen drum. At the same time, a spiral protrusion is provided inside the screen drum, and the spiral protrusion pushes the stone to move toward the outlet end of the screen drum. Since the discharge end of the screen drum is flush with the discharge port, the stone that has not passed through the screen hole of the screen drum moves to the side of the discharge port and is discharged through the discharge port.

[0009] Further, the upper shell is provided with an air inlet, an air inlet shell is installed on the air inlet, two valve plates are installed in the air inlet shell, the valve plates are connected to the inner wall of the air inlet shell through spring plates, and the spring plates push the lower side of the corresponding valve plate close to the lower side of the other valve plate; The air inlet end of the air inlet shell is a tubular structure, and a flange is provided at the port of the tubular structure. The air inlet pipe is connected to the tubular structure and is fixedly connected with the corresponding flange and bolts. At the same time, the air outlet end of the air inlet shell is a rectangular channel, which is convenient for the incoming gas to diffuse to the surrounding side. When the air inlet shell is not taking in air, the two valve plates are pushed by the corresponding spring pieces to close the air outlet end of the air inlet shell. When air is taken in, as the gas pressure inside the air inlet shell increases, the incoming gas blows the valve plate to compress the spring piece, thereby realizing the opening of the two valve plates, and the compressed air is blown toward the sieve drum through the generated gap, thereby realizing the blowing away of dust attached to the sieve holes of the sieve drum, and solving the problem of dust accumulation in the sieve holes of the sieve drum.

[0010] Furthermore, the two sieve cylinders are provided with strip grooves, the two opposite sides of the sieve plate are provided with protrusions, angle seats are provided below the protrusions, and the angle seats are fixed on the outer sides of the side plates, guide rods are vertically provided on the angle seats, the guide rods pass through the corresponding protrusions, and the guide rods are sleeved with springs located between the protrusions and the angle seats; Top blocks are installed on opposite sides of the sieve plate, two groups of slots are opened on the outer side of the sieve cylinder, the slots are distributed correspondingly to the top blocks, the sieve plate is distributed obliquely, a guide plate and a discharge plate are installed on the bottom surface of the sieve plate, two guide plates are provided, the two guide plates are located on both sides of the discharge plate, and the discharge plate passes through the rectangular slot and extends out of the housing assembly; During the rotation of the screen drum, the top of the top block slides along the outer surface of the screen drum. When the top of the top block moves to the trough body, the top of the top block falls into the trough body, so that the spring pushes the convex block to slide upward along the guide rod. Since the convex block and the screen plate form an integral structure, the convex block and the screen plate move synchronously. During the rotation of the screen drum, the top block separates from the trough body and falls into the trough body, so that the screen plate vibrates up and down, and the vibration of the screen plate facilitates the screening of the stones falling on the screen plate. At the same time, the screen plate is tilted and distributed, which makes it easy for the material to move to one side of the discharge plate during vibration and be discharged through the discharge plate. In addition, the guide plates on both sides of the discharge plate make it easy for the stone to move to the discharge plate.

[0011] Furthermore, the discharging end of the conveyor belt is close to the opening groove provided on the second end cover, and the sand and gravel output by the conveyor belt are discharged through the opening groove.

[0012] Furthermore, the mixing barrel comprises a barrel body, a plurality of support rods are installed at the bottom end of the barrel body, and a mixing assembly is installed in the barrel body.

[0013] A conical seat is provided in the middle of the barrel body, a step hole is provided at the end of the conical seat, and a first convex ridge is provided on the bottom surface of the step hole. A discharge port is provided at the bottom of the barrel body, a door body is installed in the discharge port, a column and a handle are connected to the door body, and the column passes through a hinge seat provided on the outer side of the barrel body; Further, the stirring assembly includes a turntable, an extension arm is provided on the circumference of the turntable, a mounting frame is installed on the extension arm, a stirring plate is installed at the bottom end of the mounting frame, a second convex ridge and a pin rod are provided at the bottom of the turntable, at least two second convex ridges are provided, and the two second convex ridges are evenly distributed around the axis of the pin rod, the pin rod is installed in the step hole, and the second convex ridge cooperates with the first convex ridge, a second motor is installed at the bottom end of the barrel body, the second motor is connected to the pin rod, and a ring body is installed in the port of the barrel body; During the concrete mixing process, the second motor drives the turntable to rotate through the pin rod, so that the turntable drives 2234 and 2234 to rotate, so as to mix the stone, cement and water falling into the barrel body, thereby realizing the processing of concrete. After the concrete processing is completed, the handle drives the door body to rotate to open the discharge port of the barrel body, which is convenient for discharging.

[0014] The present invention has the following beneficial effects: (1) In the present invention, the stones to be screened are added to the interior of the feed shell, and the stones to be screened enter the interior of the screen drum through the feed shell. At the same time, the first motor drives the screen drum to rotate through the shaft body. The screen holes of the screen drum are larger than the screen holes of the screen plate. There are no screen holes on the conveyor belt. The stones screened through the screen holes of the screen drum fall on the screen plate, and the stones screened through the screen holes of the screen plate fall on the conveyor belt and are sent out and fall into the stirring device, thereby reducing the transportation of materials.

[0015] (2) The bottom sides of the first end cover and the side panels in the shell assembly of the present invention are both installed on the upper surface of the base frame. At the same time, the first end cover and the side panels are both vertically distributed. Two first end covers and two side panels are each provided. The first end covers and the side panels are spliced ​​at intervals. The assembled first end covers and side panels form a rectangular frame. The upper port of the rectangular frame is closed by the upper shell. The splicing structure is convenient for replacing vulnerable parts.

[0016] (3) The bottom sides of the first end cover and the side panels in the shell assembly of the present invention are both installed on the upper surface of the base frame. At the same time, the first end cover and the side panels are both vertically distributed. Two first end covers and two side panels are each provided. The first end covers and the side panels are spliced ​​at intervals. The assembled first end covers and side panels form a rectangular frame. The upper port of the rectangular frame is closed by the upper shell. The splicing structure is convenient for replacing vulnerable parts.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention is shown in the following figure. Figure 1 ; Figure 3 For the present invention Figure 2 Schematic diagram of point A; Figure 4 The present invention is shown in the following figure. Figure 2 ; Figure 5 It is a schematic diagram of the grading and screening part of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of point B; Figure 7 It is a side schematic diagram of the grading screening part of the present invention; Figure 8 Schematic diagram of the stirring assembly of the present invention Figure 1 ; Fig. 9 Schematic diagram of the stirring assembly of the present invention Figure 2 ; In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, screening assembly; 11, housing assembly; 111, first end cover; 1111, discharge port; 112, side plate; 1121, rectangular groove; 1122, strip groove; 113, upper housing; 1131, air inlet; 114, second end cover; 1141, circular groove; 1142, open groove; 115, feed housing; 116, air inlet housing; 117, valve plate; 12, sieve cylinder; 121, bracket; 122, trough body; 123, spiral protrusion; 13, shaft body; 14, sieve plate; 141, convex block; 142, angle seat; 143. Guide rod; 144. Spring; 145. Top block; 15. Guide plate; 16. Discharge plate; 17. Conveyor belt; 18. First motor; 19. Base frame; 2. Stirring assembly; 21. Stirring barrel; 211. Barrel body; 212. Conical seat; 213. Step hole; 214. First ridge; 215. Support rod; 216. Door body; 217. Handle; 22. Rotating assembly; 221. Turntable; 222. Extension arm; 223. Mounting frame; 224. Stirring plate; 225. Second ridge; 226. Pin rod; 23. Ring body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0021] See also Figure 1-Figure 9 As shown, the present invention is a stone grading and screening device for concrete, comprising: The screening component 1 comprises a housing component 11 and a grading screening part, wherein the grading screening part is installed inside the housing component 11; The grading and screening section includes a screen drum 12, a screen plate 14 and a conveyor belt 17 which are arranged in sequence from top to bottom; The stirring assembly 2 comprises a stirring barrel 21 and a rotating assembly 22, wherein the rotating assembly 22 is installed inside the stirring barrel 21; The discharge end of the sieve plate 14 is located directly above the mixing barrel 21; The stones to be screened are added to the interior of the feed shell 115, and the stones to be screened enter the interior of the sieve drum 12 through the feed shell 115. At the same time, the first motor 18 drives the sieve drum 12 to rotate through the shaft 13. The sieve holes of the sieve drum 12 are larger than the sieve holes of the sieve plate 14. There are no sieve holes on the conveyor belt 17. The stones screened through the sieve holes of the sieve drum 12 fall on the sieve plate 14, and the stones screened through the sieve holes of the sieve plate 14 fall on the conveyor belt 17 and are sent out.

[0022] The housing assembly 11 is mounted on a base frame 19 . The base frame 19 is mounted above the mixing barrel 21 . The height of the base frame 19 is adjusted according to the height of the mixing barrel 21 .

[0023] The housing assembly 11 includes two parallel side plates 112, and the two opposite ends of the two side plates 112 are respectively installed with a vertically distributed first end cover 111 and a second end cover 114, and the top ends of the two side plates 112 are installed with an upper housing 113, and the second end cover 114 is provided with a circular groove 1141, and the second end cover 114 is installed with a feed housing 115 connected with the circular groove 1141, and the feed port of the feed housing 115 opens upward, and the circular groove 1141 is connected with the screen drum 12; The bottom sides of the first end cover 111 and the side panel 112 in the shell assembly 11 are installed on the upper surface of the base frame 19. At the same time, the first end cover 111 and the side panel 112 are vertically distributed. Two of the first end cover 111 and the side panel 112 are provided. The first end cover 111 and the side panel 112 are spaced apart and spliced. The assembled first end cover 111 and the side panel 112 form a rectangular frame. The upper port of the rectangular frame is closed by the upper shell 113. The splicing structure is convenient for replacing vulnerable parts.

[0024] The two ends of the screen drum 12 are provided with brackets 121, and the screen drum 12 is sleeved on the shaft body 13 through the brackets 121. The two ends of the shaft body 13 are respectively installed on the feed housing 115 and the first end cover 111. The outer surface of the first end cover 111 is installed with a first motor 18 that is transmission-connected to the shaft body 13. The first end cover 111 is provided with a discharge port 1111, and the discharge port 1111 is connected to the discharge end of the screen drum 12. During operation, the first motor 18 drives the screen drum 12 to rotate through the shaft 13. The column of the bracket 121 is composed of an inclined plate body. The rotating inclined plate body pushes the stone into the interior of the screen drum 12. At the same time, a spiral protrusion 123 is provided inside the screen drum 12. The spiral protrusion 123 pushes the stone to move toward the outlet end of the screen drum 12. Since the discharge end of the screen drum 12 is flush with the discharge port 1111, the stone that has not passed through the sieve holes of the screen drum 12 moves to the side of the discharge port 1111 and is discharged through the discharge port 1111.

[0025] The upper shell 113 is provided with an air inlet 1131, and an air inlet shell 116 is installed on the air inlet 1131. Two valve plates 117 are installed in the air inlet shell 116. The valve plates 117 are connected to the inner wall of the air inlet shell 116 through spring plates. The spring plates push the lower side of the corresponding valve plate 117 close to the lower side of the other valve plate 117. The air inlet end of the air inlet shell 116 is a tubular structure, and a flange is provided at the port of the tubular structure. The air inlet pipe is connected to the tubular structure and is fixedly connected with bolts through the corresponding flange. At the same time, the air outlet end of the air inlet shell 116 is a rectangular channel, which is convenient for the incoming gas to diffuse to the surrounding side. When the air inlet shell 116 is not taking in air, the two valve plates 117 are pushed by the corresponding spring pieces to close the air outlet end of the air inlet shell 116. When taking in air, as the gas pressure inside the air inlet shell 116 increases, the incoming gas blows the valve plate 117 to compress the spring piece, thereby realizing the opening of the two valve plates 117, and the compressed air is blown toward the sieve drum 12 through the generated gap, thereby realizing the blowing away of dust attached to the sieve holes of the sieve drum 12, and solving the problem of dust accumulation in the sieve holes of the sieve drum 12.

[0026] The two sieve drums 12 are provided with strip grooves 1122, and the two opposite sides of the sieve plate 14 are provided with protrusions 141, and angle seats 142 are provided below the protrusions 141. At the same time, the angle seats 142 are fixed to the outer surface of the side plate 112, and guide rods 143 are vertically provided on the angle seats 142. The guide rods 143 pass through the corresponding protrusions 141, and the guide rods 143 are sleeved with springs 144 located between the protrusions 141 and the angle seats 142; Top blocks 145 are installed on opposite sides of the sieve plate 14. Two groups of slots 122 are opened on the outer side of the sieve drum 12. The slots 122 are arranged corresponding to the top blocks 145. The sieve plate 14 is inclined. A guide plate 15 and a discharge plate 16 are installed on the bottom surface of the sieve plate 14. Two guide plates 15 are provided. The two guide plates 15 are located on both sides of the discharge plate 16. The discharge plate 16 extends out of the housing assembly 11 through the rectangular slot 1121. During the rotation of the screen drum 12, the top of the top block 145 slides along the outer surface of the screen drum 12. When the top of the top block 145 moves to the slot body 122, the top of the top block 145 falls into the slot body 122, so that the spring 144 pushes the protrusion 141 to slide upward along the guide rod 143. Since the protrusion 141 and the screen plate 14 form an integral structure, the protrusion 141 and the screen plate 14 move synchronously. During the rotation of the screen drum 12, the top block 145 separates from the slot body 122 and falls into the slot body 122, so that the screen plate 14 vibrates up and down, and the vibration of the screen plate 14 facilitates the screening of the stones falling on the screen plate 14. At the same time, the screen plate 14 is tilted and distributed, so that when vibrating, the material can move to one side of the discharge plate 16 and be discharged through the discharge plate 16. In addition, the guide plates 15 provided on both sides of the discharge plate 16 can facilitate the movement of the stone to the discharge plate 16.

[0027] The discharging end of the conveyor belt 17 is close to the opening groove 1142 provided on the second end cover 114 , and the sand and gravel output by the conveyor belt 17 is discharged through the opening groove 1142 .

[0028] The mixing barrel 21 includes a barrel body 211 , a plurality of support rods 215 are installed at the bottom end of the barrel body 211 , and a rotating assembly 22 is installed inside the barrel body 211 .

[0029] A conical seat 212 is provided in the middle of the barrel body 211, a step hole 213 is provided at the end of the conical seat 212, and a first convex ridge 214 is provided on the bottom surface of the step hole 213. The bottom of the barrel body 211 is provided with a discharge port, and a door body 216 is installed in the discharge port. The door body 216 is connected with a column and a handle 217. At the same time, the column passes through a hinge seat provided on the outer surface of the barrel body 211. The rotating assembly 22 includes a rotating disk 221, an extension arm 222 is provided on the circumference of the rotating disk 221, a mounting frame 223 is installed on the extension arm 222, a stirring plate 224 is installed at the bottom end of the mounting frame 223, a second convex ridge 225 and a pin 226 are provided at the bottom of the rotating disk 221, at least two second convex ridges 225 are provided, and the two second convex ridges 225 are evenly distributed around the axis of the pin 226, the pin 226 is installed in the step hole 213, and the second convex ridge 225 cooperates with the first convex ridge 214, a second motor is installed at the bottom end of the barrel body 211, the second motor is connected to the pin 226, and a ring body 23 is installed in the port of the barrel body 211; During the concrete mixing process, the second motor drives the turntable 221 to rotate through the pin rod 226, so that the turntable 221 drives 2234 and 2234 to rotate, so as to mix the stone, cement and water falling into the barrel body 211, thereby realizing the processing of concrete. After the concrete processing is completed, the handle 217 drives the door body 216 to rotate, and the discharge chute of the barrel body 211 is opened to facilitate discharge.

[0030] The existing stone material contains a large amount of sand and gravel, as well as stone particles of different sizes. The screening component 1 is used to select stone particles of similar sizes. When in use, the stones to be screened are added to the inside of the feed housing 115, and the stones to be screened enter the inside of the screen drum 12 through the feed housing 115. At the same time, the first motor 18 drives the screen drum 12 to rotate through the shaft 13. The screen holes of the screen drum 12 are larger than the screen holes of the screen plate 14. The conveyor belt 17 is not provided with screen holes. The stones screened through the screen holes of the screen drum 12 fall on the screen plate 14, and the stones screened through the screen holes of the screen plate 14 fall on the conveyor belt 17 and are sent out. Stone particles with a size larger than the sieve holes of the sieve drum 12 are discharged through the discharge port 1111, and stone particles and sand and gravel with a size smaller than the sieve plate 14 are discharged through the conveyor belt 17. Stones discharged through the discharge plate 16 fall into the mixing barrel 21, thereby reducing dust in the stones.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A stone grading and screening device for concrete, characterized in that: include: A screening assembly (1) comprises a housing assembly (11) and a grading screening section, wherein the grading screening section is installed inside the housing assembly (11); The grading and screening section comprises a screen drum (12), a screen plate (14) and a conveyor belt (17) which are arranged in sequence from top to bottom; A stirring assembly (2), comprising a stirring barrel (21) and a rotating assembly (22), wherein the rotating assembly (22) is installed inside the stirring barrel (21); The discharge end of the sieve plate (14) is located directly above the stirring barrel (21).

2. The concrete stone grading and screening device according to claim 1, characterized in that: The housing assembly (11) is mounted on a base frame (19); The base frame (19) is installed above the mixing barrel (21).

3. The concrete stone grading and screening device according to claim 1, characterized in that: The housing assembly (11) comprises two mutually parallel side plates (112), and a vertically distributed first end cover (111) and a second end cover (114) are respectively installed at opposite ends of the two side plates (112); An upper shell (113) is installed on the top ends of the two side plates (112); The second end cover (114) is provided with a circular groove (1141), and a feed housing (115) connected to the circular groove (1141) is mounted on the second end cover (114); the feed port of the feed housing (115) opens upward, and the circular groove (1141) is connected to the screen drum (12).

4. The concrete stone grading and screening device according to claim 3, characterized in that: Brackets (121) are provided at both ends of the screen cylinder (12); The screen drum (12) is sleeved on the shaft body (13) via a bracket (121); the two ends of the shaft body (13) are respectively mounted on a feed housing (115) and a first end cover (111); a first motor (18) drivingly connected to the shaft body (13) is mounted on an outer surface of the first end cover (111); The first end cover (111) is provided with a discharge port (1111), and the discharge port (1111) is in communication with a discharge end of the screen drum (12).

5. The concrete stone grading and screening device according to claim 3, characterized in that: An air inlet (1131) is provided on the upper shell (113), and an air inlet shell (116) is mounted on the air inlet (1131); Two valve plates (117) are installed in the air intake housing (116); the valve plates (117) are connected to the inner wall of the air intake housing (116) via spring plates; the spring plates push the lower side of the corresponding valve plate (117) close to the lower side of the other valve plate (117).

6. The concrete stone grading and screening device according to claim 1, characterized in that: The two sieve cylinders (12) are both provided with strip-shaped grooves (1122); The sieve plate (14) is provided with protrusions (141) on two opposite sides, and a corner seat (142) is provided below the protrusion (141), and the corner seat (142) is fixed to the outer surface of the side plate (112); A guide rod (143) is vertically disposed on the angle seat (142), the guide rod (143) passes through the corresponding convex block (141), and a spring (144) located between the convex block (141) and the angle seat (142) is sleeved on the guide rod (143).

7. The concrete stone grading and screening device according to claim 6, characterized in that: Top blocks (145) are installed on opposite sides of the sieve plate (14); Two groups of grooves (122) are provided on the outer surface of the screen cylinder (12), and the grooves (122) are distributed correspondingly to the top blocks (145); The sieve plate (14) is distributed obliquely, and a guide plate (15) and a discharge plate (16) are installed on the bottom surface of the sieve plate (14). Two guide plates (15) are provided, and the two guide plates (15) are located on both sides of the discharge plate (16). The discharge plate (16) passes through the rectangular groove (1121) and extends out of the housing assembly (11).

8. The concrete stone grading and screening device according to claim 1, characterized in that: The discharge end of the conveyor belt (17) is close to the opening groove (1142) provided on the second end cover (114).

9. The concrete stone grading and screening device according to claim 1, characterized in that: The mixing barrel (21) comprises a barrel body (211), and a plurality of support rods (215) are installed at the bottom end of the barrel body (211); A rotating assembly (22) is installed in the barrel body (211).

10. The concrete stone grading and screening device according to claim 9, characterized in that: A conical seat (212) is provided in the middle of the barrel body (211), a step hole (213) is provided at the end of the conical seat (212), and a first convex ridge (214) is provided on the bottom surface of the step hole (213); The rotating assembly (22) comprises a rotating disk (221), an extension arm (222) is provided on the circumference of the rotating disk (221), a mounting frame (223) is mounted on the extension arm (222), and a stirring plate (224) is mounted on the bottom end of the mounting frame (223); The bottom of the rotating disk (221) is provided with a second convex ridge (225) and a pin rod (226), at least two second convex ridges (225) are provided, and the two second convex ridges (225) are evenly distributed around the axis of the pin rod (226); The pin rod (226) is installed in the step hole (213), and the second convex ridge (225) cooperates with the first convex ridge (214); A second motor is installed at the bottom end of the barrel body (211), and the second motor is connected to the pin rod (226); A ring body (23) is installed in the port of the barrel body (211).

Images