Dust-free gravel screening device

Abstract

The utility model discloses a gravel dust-free screening device which comprises a screening barrel, and a supporting bottom frame is arranged at the bottom of the screening barrel. The top of the screening barrel is open, and a screening assembly is arranged in the screening barrel. According to the sand screening device, the sand screening effect can be improved, and meanwhile dust generated during sand screening can be restrained. The gravel dust-free screening device is suitable for dust-free screening of gravels and is used for screening the gravels.

Description

Technical Field

[0001] This utility model belongs to the field of screening equipment and relates to a screening device, specifically a dust-free sand and gravel screening device. Background Technology

[0002] Due to their good hardness and stable chemical properties, sand and gravel are widely used as high-quality concrete raw materials in housing, roads, highways, railways, and other engineering fields. Before using sand and gravel, they need to be screened by a screening device to select sand and gravel of different particle sizes and to use suitable sand and gravel in construction.

[0003] Most existing sand and gravel screening devices involve installing a rotary drum screen at an angle on a frame. The material moves due to its own weight, and sand and gravel of the desired particle size automatically fall through the screen into a storage hopper below. Waste material is discharged from the waste outlet at the tail of the drum screen as it rotates. However, this type of screening device results in a short residence time for sand and gravel within the drum screen, leading to poor screening efficiency.

[0004] Chinese patent CN119216207A relates to the field of screening technology, specifically to a sand and gravel screening device for concrete production. The device includes a frame with a support surface inclined in a front-to-back direction. A screening cylinder is mounted on the support surface, comprising a front feed cylinder and a rear discharge cylinder, both fixedly mounted on the support surface. Multiple movable screen cylinders, all with the same diameter and connected sequentially from front to back, are positioned between the feed and discharge cylinders. Each movable screen cylinder has a rotating annular screen on its outer circumference, with the mesh size of the annular screens gradually increasing from front to back. Each movable screen cylinder can slide perpendicular to the support surface, and each movable screen cylinder is equipped with a driving mechanism that drives the annular screens to rotate. The rotation directions of adjacent annular screens are opposite, improving the screening effect.

[0005] The sand and gravel screening device involved in the above patent can improve the screening effect, but the screen is exposed. When screening sand and gravel, the fine sand screened out is scattered and splashed during the operation of the machine, which causes dust to form around the device and can easily cause lung diseases in workers. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention aims to provide a dust-free sand and gravel screening device that can both improve the screening effect of sand and gravel and suppress the dust generated during screening.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A dust-free sand and gravel screening device includes a screening barrel with a supporting base at the bottom; wherein the top of the screening barrel is open and screening components are installed inside.

[0009] As a limitation of this utility model, the screening assembly includes a rotating rod placed inside the screening barrel, one end of the rotating rod is movably fitted with a fixing plate, both ends of the fixing plate are fixed to the two ends inside the opening of the screening barrel, and the rotating rod passes through the center of the fixing plate; a rotating motor is fixedly installed at the end of the rotating rod above the fixing plate, and the power output end of the rotating motor is fixedly connected to the end of the rotating rod above the fixing plate; a screen is fixedly installed at the end of the rotating rod inside the screening barrel; and two sets of mutually perpendicular stirring rods are fixedly installed between the fixing plate and the screen from top to bottom.

[0010] As a further limitation of this utility model, the screen is tilted and fixed at one end of the rotating rod placed inside the screening barrel, and the tilt angle of the screen is 15°~45°.

[0011] As another limitation of this utility model, a material inlet is provided on the side wall of the screening barrel, and a material gate is rotatably provided outside the material inlet; a handle is provided on one side of the material gate.

[0012] As a third limitation of this utility model, the bottom of the screening barrel is a discharge trough, and a discharge pipe is connected to the bottom of the discharge trough. A connecting flange is provided at the end of the discharge pipe away from the discharge trough.

[0013] As a fourth limitation of this utility model, an air extraction pipe is connected between the connecting flange and the discharge trough.

[0014] As a further limitation of this utility model, a dustproof net is provided at the connection between the air extraction pipe and the discharge pipe.

[0015] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0016] (1) This utility model relates to a dust-free screening device for sand and gravel. By setting up a screening barrel, the sand and gravel are screened inside the screening barrel. At the same time, there is an air extraction pipe at the bottom of the screening barrel that can be connected to an air pump. When screening, the exhaust fan draws air from the bottom of the screening barrel, causing the air to be pressed down from the top of the screening barrel, which suppresses the dust agitated during screening from spreading out of the barrel, thus achieving dust-free screening of sand and gravel.

[0017] (2) This utility model relates to a dust-free sand and gravel screening device. By tilting the screening screen and providing a stirring rod on the rotating rod, the sand and gravel particles can be turned over during screening to prevent the sand and gravel particles from clogging the screen and affecting the screening effect.

[0018] In summary, the dust-free sand and gravel screening device of this utility model can not only improve the screening effect of sand and gravel, but also suppress the dust generated during sand and gravel screening.

[0019] This utility model is applicable to dust-free screening of sand and gravel, and is used for screening sand and gravel. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0023] In the diagram: 1. Rotating motor; 2. Screening barrel; 3. Material receiving gate; 4. Support base frame; 5. Fixing plate; 6. Rotating rod; 7. Stirring rod; 8. Screen; 9. Handle; 10. Discharge pipe; 11. Connecting flange; 12. Air extraction pipe. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0025] Example 1: A dust-free sand and gravel screening device

[0026] like Figure 1 and Figure 2 As shown, this embodiment relates to a dust-free sand and gravel screening device, including a screening barrel 2, with a supporting base 4 at the bottom of the screening barrel 2; wherein, the top of the screening barrel 2 is open, and a screening component is installed inside.

[0027] The screening assembly includes a rotating rod 6 placed inside the screening barrel 2. A fixing plate 5 is movably sleeved on one end of the rotating rod 6. The two ends of the fixing plate 5 are fixed to the two ends inside the opening of the screening barrel 2. The rotating rod 6 passes through the center of the fixing plate 5. A rotating motor 1 is fixedly installed on the end of the rotating rod 6 above the fixing plate 5. The power output end of the rotating motor 1 is fixedly connected to the end of the rotating rod 6 above the fixing plate 5. A screen 8 is fixedly installed on the end of the rotating rod 6 inside the screening barrel 2. Two sets of mutually perpendicular stirring rods 7 are fixedly installed between the fixing plate 5 and the screen 8 from top to bottom.

[0028] The screen 8 is fixed at an angle inside the screening barrel 2 on the rotating rod 6. The angle of inclination of the screen 8 is 15°~45°.

[0029] A material inlet is provided on the side wall of the screening barrel 2, and a material inlet gate 3 is rotatably provided outside the material inlet; a handle 9 is provided on the outside side of the material inlet gate 3.

[0030] The bottom of the screening barrel 2 is a discharge trough, and a discharge pipe 10 is connected to the bottom of the discharge trough. A connecting flange 11 is provided at the end of the discharge pipe 10 away from the discharge trough.

[0031] An air extraction pipe 12 connects the connecting flange 11 and the discharge chute.

[0032] A dustproof net is installed at the connection between the exhaust pipe 12 and the discharge pipe 10.

[0033] When using this embodiment, the sand and gravel to be screened is poured into the top opening of the screening bucket 2, and the rotating motor 1 is started, so that the stirring rod 7 rotates with the rotating rod 6 fixed to the power output end of the rotating motor 1. The screen 8 fixed to the end of the rotating rod 6 away from the rotating motor 1 also rotates with the rotating rod 6. Because the screen 8 is set at an angle of 15°~45° with the horizontal plane, the sand and gravel can roll on the screen 8 by their own weight and the tilt angle of the screen 8. Larger particles remain on the screen 8, and fine sand and soil fall into the discharge chute.

[0034] At the same time as the rotating motor 1 is started, the air pump is started. The air pump's air intake is connected to the air extraction pipe 12, which is connected to the discharge pipe 10. This allows air to enter from the top of the screening barrel 2, pass through the discharge chute and the discharge pipe 10, and then enter the air pump through the air extraction pipe 12. As the air flows, the air pressure helps to suppress the dust flying when the sand and gravel are tumbling. The screened sand and gravel slide into the discharge chute and fall into the receiving bag fixed under the connecting flange 11 through the discharge pipe 10.

[0035] Large particles of sand and gravel remaining in the screening bucket 4 are removed from the discharge port by opening the discharge door 3 and then packaged.

[0036] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dustless sand and gravel screening apparatus, characterized by: The screening device comprises a screening barrel, the bottom of which is provided with a supporting chassis; wherein the top of the screening barrel is open, and a screening assembly is arranged inside.

2. The sand and aggregate dust-free screening apparatus of claim 1, wherein: The screening assembly comprises a rotating rod arranged in the screening barrel, one end of the rotating rod is movably sleeved with a fixed plate, both ends of the fixed plate are fixed in the inside of both ends of the barrel opening of the screening barrel, and the rotating rod is arranged in the center of the fixed plate; one end of the rotating rod arranged above the fixed plate is fixedly provided with a rotating motor, the power output end of the rotating motor is fixedly connected with one end of the rotating rod arranged above the fixed plate; one end of the rotating rod arranged in the screening barrel is fixedly provided with a screen; two groups of stirring rods perpendicular to each other are fixedly arranged between the fixed plate and the screen from top to bottom.

3. The sand and aggregate dust-free screening apparatus of claim 2, wherein: The screen is obliquely fixed at one end of the rotating rod arranged in the inside of the screening barrel, and the inclination angle of the screen is 15°-45°.

4. The sand and aggregate dust-free screening apparatus of claim 1, wherein: A material taking opening is arranged on the side wall of the screening barrel, and a material taking door is rotatably arranged outside the material taking opening; a handle is arranged on the outer side of the material taking door.

5. The sand and aggregate dust-free screening apparatus of claim 1, wherein: The bottom of the screening barrel is a discharging chute, a discharging pipe is communicatively arranged at the bottom of the discharging chute, and a connecting flange is arranged at one end of the discharging pipe away from the communication part of the discharging chute.

6. The sand and aggregate dust-free screening apparatus of claim 5, wherein: An air extraction pipe is in communication between the connecting flange and the discharging chute.

7. The sand and aggregate dust-free screening apparatus of claim 6, wherein: A dustproof screen is arranged at the communication part of the air extraction pipe and the discharging pipe.

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