Concrete screening device

Abstract

The utility model provides a concrete screening device, which relates to the technical field of concrete production, and comprises a box body, a first motor is fixedly mounted on one side of the outer wall of the box body, second motors are fixedly mounted at the front end and the rear end of the box body, a collecting box is movably placed at the bottom end in the box body, a movable plate is arranged in the box body, and the movable plate is fixedly mounted on the box body. A screen is fixedly mounted at the top of the movable plate, a conveying cylinder is fixedly connected to one side of the inner wall of the box body, the screen mounted at the top of the movable plate can screen and separate sand and stones in raw materials, and when a second motor is started to drive a cam to rotate, the movable plate reciprocates through cooperation with a spring, so that the sliding speed of the sand and stones is increased; the conveying cylinder collects and stores the screened gravel, the first motor is started to drive the spiral conveying blade to rotate, then the gravel can be pushed out, when the gravel moves in the conveying cylinder, small raw materials can penetrate through the through holes to fall off, and the content of fine particles in the screened gravel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete production, in particular to a concrete screening device. Background Art

[0002] Concrete is a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. Concrete usually refers to cement as the cementitious material, sand and stone as aggregates, and water (which may contain admixtures and additives) mixed in a certain proportion. The cement concrete obtained by mixing is also called ordinary concrete. It is widely used in civil engineering. Generally, before making concrete, the sand and gravel in the concrete raw materials need to be screened, otherwise the large stones in the sand and gravel will easily affect the quality of the concrete later.

[0003] When screening concrete raw materials, a screen is usually placed at an angle, and then the staff uses a shovel to scoop up the raw materials and pour them onto the screen. However, the raw materials roll down by their own gravity, and a small amount of raw materials tend to accumulate on the top of the screen and cannot slide down, thereby affecting the screening efficiency of the raw materials. In addition, if the screen is tilted at a large angle, raw materials with smaller particle diameters may also fall directly from the screen, resulting in poor screening effect and waste of raw materials. Utility Model Content

[0004] The purpose of the present utility model is to solve the problem that a small amount of raw materials are easily accumulated on the top of the screen and cannot slide down, thereby affecting the screening efficiency of the raw materials. In addition, if the screen is tilted at a large angle, raw materials with smaller particle diameters may also fall directly from the screen. A concrete screening device is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a concrete screening device, comprising a box body, the top of the box body is fixedly connected to a feeding bin, the front and rear ends of the feeding bin are respectively fixedly connected to a distribution pipe 1 and a distribution pipe 2, the inner wall of the box body is respectively fixedly connected to a mounting frame 1 and a mounting frame 2, a first motor is fixedly installed on one side of the outer wall of the box body, a second motor is fixedly installed on both the front and rear ends of the box body, a collecting box is movably placed on the bottom end of the interior of the box body, a movable plate is provided inside the box body, a screen is fixedly installed on the top of the movable plate, and a conveying cylinder is fixedly connected to one side of the inner wall of the box body.

[0006] Preferably, the top ends of the first and second distribution pipes are both connected to the interior of the feeding bin, and the discharge port of the first distribution pipe is located at the top of the movable plate.

[0007] Preferably, the inner end of the mounting frame 1 is fixedly mounted with a guide rod 1, the inner end of the mounting frame 2 is fixedly mounted with a guide rod 2, and the upper and lower ends of the movable plate are movably mounted on the surfaces of the guide rod 1 and the guide rod 2 respectively.

[0008] Preferably, the output end of the second motor is fixedly connected to a mounting rod, a cam is fixedly mounted on one end of the surface of the mounting rod, and a side surface of the cam is in contact with a side surface of the movable plate.

[0009] Preferably, a guide block is fixedly installed on the top of the movable plate, a spring is fixedly connected to one side of the movable plate, and the other side of the spring is in contact with the inner wall of the box.

[0010] Preferably, the conveying cylinder is installed at the inclined bottom end of the movable plate, a sieve hole is provided at the bottom of the conveying cylinder, and one end of the conveying cylinder is located outside the box.

[0011] Preferably, the output end of the first motor is fixedly connected to a spiral conveying blade, and the spiral conveying blade is movably installed on the top of the conveying cylinder.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. In the utility model, the movable plate is installed at an angle so that the concrete raw materials can slide on its top, and the screen installed on the top of the movable plate can screen and separate the sand and gravel in the raw materials. When the second motor is started to drive the cam to rotate, the movable plate is moved back and forth by cooperating with the spring, thereby accelerating the sliding speed of the sand and gravel and preventing the sand and gravel from accumulating on the top of the screen.

[0014] 2. In the present invention, the conveying drum collects and stores the sand and gravel after screening. By starting the first motor to drive the spiral conveying blade to rotate, the crushed stone can be pushed out. When the sand and gravel move inside the conveying drum, smaller raw materials will fall through the through holes, reducing the content of fine particles in the sand and gravel after screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a box of a concrete screening device proposed in the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a box of a concrete screening device proposed in the utility model;

[0017] Figure 3 This is a schematic diagram of the side cross-sectional structure of a feeding bin of a concrete screening device proposed in the utility model;

[0018] Figure 4 This is a schematic diagram of the movable plate installation structure of a concrete screening device proposed in the utility model;

[0019] Figure 5 The utility model provides a schematic diagram of the three-dimensional structure of a conveying cylinder of a concrete screening device.

[0020] Legend: 1. Box body; 11. Feeding bin; 12. Distribution pipe 1; 13. Distribution pipe 2; 14. Mounting frame 1; 141. Guide rod 1; 15. Mounting frame 2; 151. Guide rod 2; 2. First motor; 21. Spiral conveying blade; 3. Second motor; 31. Mounting rod; 32. Cam; 4. Collecting box; 5. Movable plate; 51. Screen; 52. Guide block; 53. Spring; 6. Conveying cylinder; 601. Screen hole. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1

[0024] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: a concrete screening device, including a box body 1, a feeding bin 11 is fixedly connected to the top of the box body 1, and the front and rear ends of the feeding bin 11 are respectively fixedly connected to a distribution pipe 12 and a distribution pipe 2 13, and the inner wall of the box body 1 is respectively fixedly connected to a mounting frame 14 and a mounting frame 2 15, a first motor 2 is fixedly installed on one side of the outer wall of the box body 1, and a second motor 3 is fixedly installed on the front and rear ends of the box body 1, a collecting box 4 is movably placed on the bottom end of the interior of the box body 1, a movable plate 5 is provided inside the box body 1, and a screen 51 is fixedly installed on the top of the movable plate 5, and a conveying cylinder 6 is fixedly connected to one side of the inner wall of the box body 1. The top ends of tube 12 and distribution tube 2 13 are both connected to the interior of the feeding bin 11. The discharge port of distribution tube 12 is located at the top of the movable plate 5. The inner end of mounting frame 14 is fixedly installed with guide rod 141, and the inner end of mounting frame 2 15 is fixedly installed with guide rod 2 151. The upper and lower ends of the movable plate 5 are movably installed on the surfaces of guide rod 141 and guide rod 2 151 respectively. The output end of the second motor 3 is fixedly connected to the mounting rod 31, and a cam 32 is fixedly installed on one end of the surface of the mounting rod 31. The side of the cam 32 is in contact with the side of the movable plate 5. A spring 53 is fixedly connected to one side of the movable plate 5, and the other side of the spring 53 is in contact with the inner wall of the box body 1.

[0025] In this embodiment, concrete raw materials are put into the feeding bin 11, and the raw materials flow into the distribution pipe 1 12 and the distribution pipe 2 13 respectively. The raw materials flowing out of the distribution pipe 12 fall to the top of the movable plate 5. The movable plate 5 is installed at an angle so that the raw materials slide down from the top to the top of the conveying cylinder 6. During the rolling process, the fine particles and fragments are screened and separated, and the granular raw materials fall into the collecting box 4 for storage. During the screening process of the raw materials, the second motor 3 is started to drive the cam 32 to rotate. The rotation of the cam 32 squeezes the side of the movable plate 5, so that it slides on the surface of the guide rod 1 141 and the guide rod 2 151. The movable plate 5 moves toward the side of the spring 53 and squeezes it. When the cam 32 continues to rotate, the spring 53 rebounds and pushes the movable plate 5 back to reset, thereby causing the movable plate 5 to screen back and forth to prevent sand and gravel from piling up on the top of the screen 51 and unable to slide down.

[0026] Example 2

[0027] like Figure 1-Figure 5 As shown, a guide block 52 is fixedly installed on the top of the movable plate 5, the conveying cylinder 6 is installed at the inclined bottom end of the movable plate 5, a sieve hole 601 is opened at the bottom of the conveying cylinder 6, one end of the conveying cylinder 6 is located outside the box body 1, and the output end of the first motor 2 is fixedly connected to the spiral conveying blade 21, and the spiral conveying blade 21 is movably installed on the top of the conveying cylinder 6.

[0028] In this embodiment, the sand and gravel after screening slide to the top of the conveying cylinder 6, and then the first motor 2 is started to drive the spiral conveying blade 21 to rotate and push the sand and gravel outward, thereby realizing continuous transportation of the sand and gravel. When the sand and gravel move at the top of the conveying cylinder 6, the fine particles mixed therein will pass through the sieve hole 601 and fall into the collecting box 4, reducing the content of fine particles in the sand and gravel after screening, and the guide block 52 installed on the top of the movable plate 5 will make the sand and gravel flow to the middle section of the conveying cylinder 6, so that the sand and gravel have enough distance to move and screen, thereby improving the screening effect of particles in the sand and gravel.

[0029] The working principle of this embodiment is as follows: concrete raw materials are put into the feeding bin 11, and part of the raw materials fall to the top of the movable plate 5. During the rolling process, the fine particles and fragments are screened and separated, and the granular raw materials fall into the collecting box 4 for storage. At the same time, the second motor 3 is started to drive the cam 32 to rotate. The rotation of the cam 32 squeezes the movable plate 5 and the spring 53. When the cam 32 continues to rotate, the spring 53 rebounds and pushes the movable plate 5 back to its original position. The screened sand and gravel slide to the top of the conveying cylinder 6, and then the first motor 2 is started to drive the spiral conveying blade 21 to rotate to push the sand and gravel outward. When the sand and gravel move at the top of the conveying cylinder 6, the fine particles mixed therein will pass through the sieve hole 601 and fall into the collecting box 4, thereby reducing the content of fine particles in the sand and gravel after screening and reducing the waste of raw materials.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A concrete screening device, comprising a box (1), characterized in that: The top of the box (1) is fixedly connected to a feeding bin (11), the front and rear ends of the feeding bin (11) are respectively fixedly connected to a feeding pipe 1 (12) and a feeding pipe 2 (13), the inner wall of the box (1) is respectively fixedly connected to a mounting frame 1 (14) and a mounting frame 2 (15), a first motor (2) is fixedly mounted on one side of the outer wall of the box (1), a second motor (3) is fixedly mounted on both the front and rear ends of the box (1), a collecting box (4) is movably placed at the bottom end of the interior of the box (1), a movable plate (5) is provided inside the box (1), a screen (51) is fixedly mounted on the top of the movable plate (5), and a conveying cylinder (6) is fixedly connected to one side of the inner wall of the box (1).

2. A concrete screening device according to claim 1, characterized in that: The top ends of the distribution pipe 1 (12) and the distribution pipe 2 (13) are both connected to the interior of the feeding bin (11), and the discharge port of the distribution pipe 1 (12) is located at the top of the movable plate (5).

3. A concrete screening device according to claim 1, characterized in that: The inner end of the mounting frame 1 (14) is fixedly mounted with a guide rod 1 (141), the inner end of the mounting frame 2 (15) is fixedly mounted with a guide rod 2 (151), and the upper and lower ends of the movable plate (5) are movably mounted on the surfaces of the guide rod 1 (141) and the guide rod 2 (151), respectively.

4. A concrete screening device according to claim 1, characterized in that: The output end of the second motor (3) is fixedly connected to a mounting rod (31), and a cam (32) is fixedly mounted on one end of the surface of the mounting rod (31), with the side surface of the cam (32) being in contact with the side surface of the movable plate (5).

5. The concrete screening device according to claim 1, characterized in that: A guide block (52) is fixedly mounted on the top of the movable plate (5), a spring (53) is fixedly connected to one side of the movable plate (5), and the other side of the spring (53) is in contact with the inner wall of the box body (1).

6. A concrete screening device according to claim 1, characterized in that: The conveying cylinder (6) is installed at the inclined bottom end of the movable plate (5), a sieve hole (601) is provided at the bottom of the conveying cylinder (6), and one end of the conveying cylinder (6) is located outside the box body (1).

7. The concrete screening device according to claim 1, characterized in that: The output end of the first motor (2) is fixedly connected to a spiral conveying blade (21), and the spiral conveying blade (21) is movably mounted on the top of the conveying cylinder (6).

Images