Sand screening device

Abstract

The utility model discloses a sand screening device which comprises a sand screening cylinder, a supporting frame and a conveying belt, the sand screening cylinder is rotationally erected on the top of the supporting frame, the conveying belt used for conveying materials is arranged on the supporting frame below the sand screening cylinder, a stock bin body is arranged at one end of the sand screening cylinder, and the bottom of the stock bin body is fixed to the supporting frame through a stock bin support. A discharging opening used for discharging is formed in the side, facing the sand screening cylinder, of the bottom of the stock bin body, a rotating rod is inserted into the sand screening cylinder, and a plurality of connecting plates are fixed between the outer side of the rotating rod and the inner wall of the sand screening cylinder at equal intervals. According to the utility model, through the stirring rod synchronously rotating with the sand screening cylinder, the sand screening cylinder is driven to rotate during sand screening, and sand in the stock bin main body is stirred at the same time, so that the discharging of the sand is convenient, the screening effect is ensured, the problem that the discharging of the sand in the stock bin main body is easy to block during the sand screening of the existing sand screening device is solved, and the sand screening efficiency is improved. Therefore, smooth discharging of the stock bin main body can be guaranteed, and reduction of the sand screening speed caused by blockage is avoided.

Description

Technical Field

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

[0002] Sand refers to the granular material with a particle size of 0.074-2 mm formed by the weathering of rocks and washed by rainwater or rolled by rocks, including river sand, sea sand, metal sand, sand after the pulverization of natural sandstone, etc. In addition to being used in construction, road construction, filtration, aquaculture beautification, as a flux for smelting, etc., the silicon element contained in sand makes it the main material for making glass.

[0003] When using sand and gravel, in order to avoid the influence of impurities mixed in it on the use, screening treatment will be carried out to screen out the impurities in the sand and gravel. When the existing sand screening devices are in use, generally two methods of manual shoveling and excavator dumping are adopted. Manual shoveling is time-consuming and has a large labor cost. When the excavator dumps the sand material into the inside of the bin, due to the large friction between the sand and gravel, when the humidity of the sand and gravel is relatively high, the sand and gravel are easy to agglomerate, resulting in easy blockage when the sand and gravel are feeding. Therefore, we propose a sand screening device. Summary of the Utility Model

[0004] The problem to be solved by the utility model lies in the problem that the sand and gravel feeding in the bin of the sand screening device is easy to be blocked during sand screening in the prior art.

[0005] To solve the above technical problems, the utility model provides the following technical solution: a sand screening device, which includes a sand screening cylinder, a support frame and a conveyor belt. The outer wall of the sand screening cylinder is a grid and both ends are open. The sand screening cylinder is rotatably mounted on the top of the support frame. A conveyor belt for feeding is arranged on the support frame below the sand screening cylinder. One end of the sand screening cylinder is provided with a bin main body, and the bottom of the bin main body is fixed on the support frame through a bin support. A feeding port for feeding is opened on one side of the bottom of the bin main body facing the sand screening cylinder;

[0006] A rotating rod is inserted into the sand screening cylinder, and a number of connecting plates are fixed at equal intervals between the outer side of the rotating rod and the inner wall of the sand screening cylinder. A support plate is arranged at the top of the side end of the sand screening cylinder far from the bin main body, and the support plate is fixed on the top surface of the support frame. A driving motor is installed on one side of the support plate, and the output shaft of the driving motor rotates through to the outside of the support plate. Pulley wheels are fixed on both the output shaft of the driving motor and the rotating rod, and the two pulley wheels are connected by a transmission belt. One end of the rotating rod extending to the side of the bin main body is fixed with a connecting rotating rod, and the connecting rotating rod is rotatably connected to the lower part of the bin main body through a bearing. A number of stirring rods are fixed at equal intervals at one end of the connecting rotating rod extending into the bin main body.

[0007] As a preferred solution of a sand screening device according to the present utility model, wherein: the sand screening cylinder and the conveyor belt are both arranged to be inclined upward toward the side of the main body of the silo, a material guiding plate is arranged at the bottom of the end of the sand screening cylinder far from the main body of the silo, and both sides of the material guiding plate are fixed on the inner side wall of the support frame, and the material guiding plate is arranged to be inclined parallel to the bottom of the sand screening cylinder and the top surface of the conveyor belt.

[0008] As a preferred solution of a sand screening device according to the present utility model, wherein: a material guiding protective cover is sleeved outside the sand screening cylinder, and the bottom of the material guiding protective cover is fixed on the support frame, a blanking outlet with the same width as the conveyor belt is opened at the bottom of the material guiding protective cover, the material guiding protective cover is arranged to be inclined in cooperation with the sand screening cylinder, and the length of the material guiding protective cover is equal to the length of the sand screening cylinder.

[0009] As a preferred solution of a sand screening device according to the present utility model, wherein: the bottom of the main body of the silo is arranged to be inclined downward toward the side of the sand screening cylinder and is parallel to the sand screening cylinder and the conveyor belt.

[0010] As a preferred solution of a sand screening device according to the present utility model, wherein: a blower is installed on one side of the main body of the silo close to the material guiding protective cover, an air guiding air pipe is fixedly penetrated through the top of the material guiding protective cover, and one end of the air guiding air pipe far from the material guiding protective cover is connected to the air inlet end of the blower, and a dust collection bag is arranged at the air outlet of the blower.

[0011] As a preferred solution of a sand screening device according to the present utility model, wherein: the blanking port is fitted with the opening at the end of the sand screening cylinder, and the width of each stirring rod is smaller than the distance between the connecting rotating rod and the inner wall of the main body of the silo.

[0012] As a preferred solution of a sand screening device according to the present utility model, wherein: a filter screen for filtering sand and gravel is fixed inside the air guiding air pipe, and the filter screen is arranged to be an inverted cone matching the inner wall of the air guiding air pipe.

[0013] The beneficial effects of the present utility model are as follows: through the stirring rod that rotates synchronously with the sand screening cylinder, when screening sand, while driving the sand screening cylinder to rotate, the sand and gravel in the main body of the silo are stirred, which facilitates the blanking of the sand and gravel and also ensures the screening effect, solves the problem that the sand and gravel in the main body of the silo are prone to blockage during sand screening in the existing sand screening device, thereby ensuring that the main body of the silo can discharge materials smoothly and avoiding the reduction of the sand screening speed caused by blockage. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1 The figure is an overall structural diagram of a sand screening device.

[0016] Figure 2 The present invention is a structural diagram of a sand screening device with the drive motor and dust cover removed.

[0017] Figure 3 The present invention is a structural front view of a sand screening device.

[0018] Figure 4 The present invention is a structural cross-sectional view of a silo of a sand screening device.

[0019] Figure 5 The present invention is a front view of the internal structure of an air guide pipe of a sand screening device. DETAILED DESCRIPTION

[0020] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0021] Reference Figures 1 to 5 The present embodiment is a sand screening device, comprising a sand screening cylinder 1, a support frame 2 and a conveyor belt 3. The outer wall of the sand screening cylinder 1 is a grid, and both ends are open. The sand screening cylinder 1 is rotatably mounted on the top of the support frame 2. The support frame 2 below the sand screening cylinder 1 is provided with a conveyor belt 3 for feeding materials. A silo body 4 is provided at one end of the sand screening cylinder 1, and the bottom of the silo body 4 is fixed to the support frame 2 through a silo bracket 5. A discharge port 12 for discharge of materials is provided on the bottom of the silo body 4 facing the sand screening cylinder 1.

[0022] A rotating rod 8 is inserted inside the sand screening cylinder 1, and a number of connecting plates 9 are equidistantly fixed between the outer side of the rotating rod 8 and the inner wall of the sand screening cylinder 1. A support plate 7 is provided on the top of the sand screening cylinder 1 away from the side end of the silo body 4, and the support plate 7 is fixed to the top surface of the support frame 2. A driving motor 6 is installed on one side of the support plate 7, and the output shaft of the driving motor 6 rotates and passes through the outer side of the support plate 7. Pulleys 10 are fixed on the output shaft of the driving motor 6 and the rotating rod 8, and the two pulleys 10 are connected by a transmission belt 11. A connecting rotating rod 13 is fixed to one end of the rotating rod 8 extending to the side of the silo body 4, and the connecting rotating rod 13 is rotatably connected to the lower part of the silo body 4 through a bearing, and a number of stirring rods 14 are equidistantly fixed to one end of the connecting rotating rod 13 extending to the inside of the silo body 4.

[0023] In this embodiment, the sand screening cylinder 1 and the conveyor belt 3 are both arranged to be inclined upward toward the side of the bin main body 4. A guide plate 19 is provided at the bottom of the end of the sand screening cylinder 1 away from the bin main body 4, and both sides of the guide plate 19 are fixed on the inner side wall of the support frame 2. The guide plate 19 is used for guiding materials. After sundries or large-grained sand and gravel are screened and retained inside the sand screening cylinder 1, as the sand screening cylinder 1 rotates, they can be discharged under the inclined guidance of the sand screening cylinder 1 and can be prevented from falling on the conveyor belt 3 under the guidance of the guide plate 19. The guide plate 19 is arranged to be inclined and parallel to the bottom of the sand screening cylinder 1 and the top surface of the conveyor belt 3. The guide plate 19 facilitates material guiding and does not affect the normal operation of the bottom of the sand screening cylinder 1 and the conveyor belt 3.

[0024] In this embodiment, a guide material protection cover 15 is sleeved outside the sand screening cylinder 1, and the bottom of the guide material protection cover 15 is fixed on the support frame 2. A blanking outlet with the same width as the conveyor belt 3 is opened at the bottom of the guide material protection cover 15. The guide material protection cover 15 is arranged to be inclined and matched with the sand screening cylinder 1, and the length of the guide material protection cover 15 is equal to the length of the sand screening cylinder 1. During normal sand screening, the guide material protection cover 15 shields and protects the sand screening cylinder 1 to avoid dust flying during sand screening and polluting the air. At the same time, it can also guide the screened sand and gravel so that the qualified sand and gravel can all fall on the conveyor belt 3.

[0025] In this embodiment, the bottom of the bin main body 4 is arranged to be inclined downward toward the side of the sand screening cylinder 1 and is parallel to the sand screening cylinder 1 and the conveyor belt 3. When the rotating rod 8 rotates, it can stably drive the connecting rotating rod 13 to rotate, thereby driving the stirring rod 14 to stir the sand and gravel at the lower part of the bin main body 4 to facilitate blanking.

[0026] In this embodiment, a blower 17 is installed on one side of the bin main body 4 close to the guide material protection cover 15. A guide air pipe 16 is fixedly penetrated at the top of the guide material protection cover 15, and one end of the guide air pipe 16 away from the guide material protection cover 15 is connected to the air inlet end of the blower 17. A dust collection bag is arranged at the air outlet of the blower 17. During sand screening, the dust is avoided from spreading by means of dust suction.

[0027] In this embodiment, the blanking port 12 is fitted with the end opening of the sand screening cylinder 1. The width of each stirring rod 14 is less than the distance between the connecting rotating rod 13 and the inner wall of the bin main body 4, ensuring that the sand and gravel can enter the inside of the sand screening cylinder 1 from the end opening of the sand screening cylinder 1 under the guidance of the blanking port 12 to facilitate screening.

[0028] In this embodiment, a filter screen 18 for filtering sand and gravel is fixed inside the guide air pipe 16, and the filter screen 18 is arranged to be an inverted cone matched with the inner wall of the guide air pipe 16. After the blower 17 sucks in the dust and fine sand and gravel generated during sand screening, the dust and fine sand and gravel will pass through the filter screen 18 to filter the fine sand and gravel after entering the guide air pipe 16 to avoid blocking the blower 17. The dust is collected by a dust collection bag (not shown in the specification drawings) to avoid re-pollution caused by the discharge of dust.

[0029] Working principle: When screening sand, the sand and gravel raw materials are poured into the interior of the main bin body 4 by an excavator. The sand and gravel slide through the feeding port 12 into the sand screening cylinder 1. The driving motor 6 is turned on, and the driving motor 6 operates to drive the pulley 10 to rotate through the output shaft. Then, the transmission belt 11 can drive another pulley 10 to rotate, thereby driving the fixed rotating rod 8 of the other pulley 10 to rotate. When the rotating rod 8 rotates, the sand screening cylinder 1 is driven to rotate through the connecting plate 9. When the sand screening cylinder 1 rotates under the action of centrifugal force, the sand and gravel are driven to move and screened. When the rotating rod 8 rotates, the connecting rotating rod 13 is driven to rotate. When the connecting rotating rod 13 rotates, the stirring rod 14 is driven to break up the sand and gravel at the lower part of the main bin body 4 to prevent the sand and gravel from caking and piling up at the feeding port 12, resulting in no feeding. After screening, the qualified screened sand passes through the sand screening cylinder 1 and the guide material protection cover 15 and falls on the top surface of the conveyor belt 3, and then can be conveyed through the conveyor belt 3. The unqualified sand and gravel cannot pass through the sand screening cylinder 1 and are discharged through the opening at the end of the sand screening cylinder 1 and collected after being guided by the guide plate 19. While screening sand, the fan 17 is turned on, and the fan 17 operates to absorb the airflow generated by screening sand, and the sand and gravel are filtered through the filter net 18 to prevent the air guide pipe 16 from being blocked, and at the same time, to prevent the airflow with dust from floating and polluting the air during sand screening.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A sand screening device, characterized in that: It includes a sand screening cylinder (1), a support frame (2) and a conveyor belt (3). The outer wall of the sand screening cylinder (1) is a grid with openings at both ends. The sand screening cylinder (1) is rotatably mounted on the top of the support frame (2). A conveyor belt (3) for feeding is arranged on the support frame (2) below the sand screening cylinder (1). One end of the sand screening cylinder (1) is provided with a bin main body (4), and the bottom of the bin main body (4) is fixed on the support frame (2) through a bin support (5). A feeding port (12) for discharging materials is opened on one side of the bottom of the bin main body (4) facing the sand screening cylinder (1). A rotating rod (8) is inserted into the sand screening cylinder (1), and a number of connecting plates (9) are fixedly arranged at equal intervals between the outer side of the rotating rod (8) and the inner wall of the sand screening cylinder (1). A support plate (7) is arranged at the top of the side end of the sand screening cylinder (1) far from the bin main body (4), and the support plate (7) is fixed on the top surface of the support frame (2). A driving motor (6) is installed on one side of the support plate (7), and the output shaft of the driving motor (6) rotates through to the outside of the support plate (7). Pulley wheels (10) are fixedly arranged on both the output shaft of the driving motor (6) and the rotating rod (8). The two pulley wheels (10) are connected by a transmission belt (11). One end of the rotating rod (8) extending to the side of the bin main body (4) is fixedly provided with a connecting rotating rod (13), and the connecting rotating rod (13) is rotatably connected to the lower part of the bin main body (4) through a bearing. A number of stirring rods (14) are fixedly arranged at equal intervals at one end of the connecting rotating rod (13) extending into the bin main body (4).

2. The sand screening device according to claim 1, characterized in that: Both the sand screening cylinder (1) and the conveyor belt (3) are arranged to be inclined upward toward the bin main body (4). A guide plate (19) is arranged at the bottom of the end of the sand screening cylinder (1) far from the bin main body (4), and both sides of the guide plate (19) are fixed on the inner side wall of the support frame (2). The guide plate (19) is arranged to be inclined parallel to the bottom of the sand screening cylinder (1) and the top surface of the conveyor belt (3).

3. A sand screening device as claimed in claim 1, wherein: A guide material protection cover (15) is sleeved outside the sand screening cylinder (1), and the bottom of the guide material protection cover (15) is fixed on the support frame (2). A feeding outlet with the same width as the conveyor belt (3) is opened at the bottom of the guide material protection cover (15). The guide material protection cover (15) is arranged to be inclined to cooperate with the sand screening cylinder (1), and the length of the guide material protection cover (15) is equal to the length of the sand screening cylinder (1).

4. A sand screening device according to claim 1, characterized in that: The bottom of the bin main body (4) is arranged to be inclined downward toward the sand screening cylinder (1) and is parallel to the sand screening cylinder (1) and the conveyor belt (3).

5. The sand screening device according to claim 3, wherein: A blower (17) is installed on one side of the bin main body (4) close to the guide material protection cover (15). An air guide pipe (16) is fixedly arranged through the top of the guide material protection cover (15), and one end of the air guide pipe (16) far from the guide material protection cover (15) is connected to the air inlet end of the blower (17). A dust collection bag is arranged at the air outlet of the blower (17).

6. The sand screening device according to claim 1, wherein: The feeding port (12) is fitted with the opening at the end of the sand screening cylinder (1). The width of each stirring rod (14) is less than the distance between the connecting rotating rod (13) and the inner wall of the bin main body (4).

7. The sand screening device according to claim 5, characterized in that: A filter net (18) for filtering sand and gravel is fixedly arranged inside the air guiding air pipe (16), and the filter net (18) is arranged as an inverted cone matching the inner wall of the air guiding air pipe (16).

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