A multi-stage sand and gravel screening device for construction

Abstract

The utility model discloses a sandstone multistage screening device for building construction, including fixed installation on the bracket casing, rotatable installation has the third screen cylinder of inclined setting in the casing, the second screen cylinder is fixedly connected in the third screen cylinder, the first screen cylinder is fixedly installed in the second screen cylinder, the utility model discloses when using, after starting the induced draft fan and the speed reducer, the sandstone of screening is sent into the first screen cylinder by the feeding hopper and falls to the first screen cylinder's unloading end, under the drive of the speed reducer, the first screen cylinder, the second screen cylinder and the third screen cylinder will rotate simultaneously to carry out three times screening to the sandstone, and the sandstone after screening will be discharged by the corresponding discharge hopper, under the action of the induced draft fan, the air in the casing will be constantly sucked into the cyclone dust collector, and the outside air will enter the casing by the feeding hopper and the discharge hopper, therefore the most part of dust raised in the screening process will be sucked into the cyclone dust collector by the dust absorption cover, thereby reducing the pollution to the surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening technology, specifically a multi-stage screening device for sand and gravel used in construction. Background Technology

[0002] Sand and gravel are common building materials. When using sand and gravel, they need to be screened first. The common screening method is to manually throw the sand and gravel onto the screening screen with an iron shovel. This method is not only time-consuming and labor-intensive, but also has low screening efficiency. Therefore, nowadays screening equipment adopts automated operation and graded screening methods, which greatly improves the screening efficiency of sand and gravel and greatly saves manpower.

[0003] A search revealed that patent CN219723699U discloses a construction sand and gravel screening machine. This machine utilizes a reciprocating screw to drive a cleaning brush and cleaning wheel on a filter plate, preventing them from moving back and forth. This facilitates the cleaning of materials adhering to the filter plate, preventing clogging of the screen holes and ensuring optimal screening performance. Furthermore, the shape of the cleaning cone on the cleaning wheel's surface, in conjunction with the shape of the screen holes, helps to push materials adhering to the inner wall of the screen holes out through the rotation of the cleaning wheel. This allows for deeper cleaning of clogged screen holes and improves the cleaning effect on the filter plate.

[0004] Although the above solution can screen sand and gravel using a filter plate with sieve holes, it can only perform a single screening. Furthermore, since its screening structure is directly exposed to the outside, the dust generated during the screening process will spread directly to the outside world, causing environmental pollution. Therefore, it needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage screening device for sand and gravel used in construction, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-stage screening device for sand and gravel used in construction includes a housing fixedly mounted on a support. A third screen cylinder is rotatably mounted inside the housing at an incline. A second screen cylinder is fixedly connected inside the third screen cylinder, and a first screen cylinder is fixedly mounted inside the second screen cylinder. The discharge end of the second screen cylinder extends out from the third screen cylinder, and the discharge end of the first screen cylinder extends out from the second screen cylinder. A geared motor is fixedly connected to the outer wall of the housing via a support. The first screen cylinder is driven by the drive shaft of the geared motor. Four discharge hoppers are arranged along the length of the bottom of the housing. The discharge ends of the first, second, and third screen cylinders are located directly above the corresponding discharge hoppers. A feeding hopper is fixedly inserted through the outer wall of the housing, and the discharge end of the feeding hopper is located inside the feeding end of the first screen cylinder. A dust collection hood is fixedly connected to the top of the housing, and the air outlet of the dust collection hood is connected to the air inlet of an industrial dust removal device via a pipe.

[0008] As a further embodiment of this utility model: the outer walls of the first sieve cylinder, the second sieve cylinder and the third sieve cylinder are all provided with sieve holes, and the sieve hole diameter of the first sieve cylinder is larger than that of the second sieve cylinder, and the sieve hole diameter of the second sieve cylinder is larger than that of the third sieve cylinder.

[0009] As a further embodiment of this utility model: a baffle is fixedly connected between every two adjacent discharge hoppers inside the housing, and a groove is provided at the top of the baffle. The discharge ends of the first screen cylinder, the second screen cylinder and the third screen cylinder pass through the corresponding grooves, and the inner diameter of the groove is adapted to the outer diameter of the corresponding first screen cylinder, the second screen cylinder and the third screen cylinder.

[0010] As a further embodiment of this utility model: a baffle is fixedly sleeved on the outer wall of the feeding end of the first screen cylinder, and the second and third screen cylinders are both fixedly connected to the baffle. The feeding end of the third screen cylinder is fixedly connected to the second screen cylinder through multiple connecting rods, and the feeding end of the second screen cylinder is fixedly connected to the first screen cylinder through multiple connecting rods. The output shaft of the geared motor passes through the housing and is fixedly connected to a transmission shaft through a coupling. A connecting seat is fixedly connected to the end of the transmission shaft away from the geared motor. The connecting seat is fixedly connected to the feeding end of the first screen cylinder through multiple connecting rods.

[0011] As a further embodiment of this utility model: a collar is fixedly sleeved on the outer wall of the third screen cylinder near both ends, and a frame is fixedly connected to the corresponding position of the collar inside the housing. The collar is located in the corresponding frame. Multiple guide wheels are installed on the inner wall of the frame. The outer peripheral wall of each guide wheel is provided with a groove, and the outer edge of the collar is located in the groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] When this utility model is in use, after starting the induced draft fan and the geared motor, the sand and gravel to be screened are fed into the first screen cylinder through the feeding hopper and roll down to the discharge end of the first screen cylinder. Driven by the geared motor, the first screen cylinder, the second screen cylinder, and the third screen cylinder will rotate simultaneously to screen the sand and gravel three times. The screened sand and gravel will be discharged from the corresponding discharge hopper. Under the action of the induced draft fan, the air inside the shell will be continuously drawn into the cyclone dust collector, and the outside air will enter the shell through the feeding hopper and the discharge hopper. Therefore, most of the dust generated during the screening process will be sucked into the cyclone dust collector by the dust collection hood, thereby reducing pollution to the surrounding environment and achieving good results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a multi-stage screening device for sand and gravel used in construction.

[0015] Figure 2 This is a schematic diagram of the baffle structure in a multi-stage screening device for sand and gravel used in construction.

[0016] Figure 3 This is a schematic diagram of the frame structure in a multi-stage screening device for sand and gravel used in construction.

[0017] Figure 4 This is a schematic diagram of the baffle structure in a multi-stage screening device for sand and gravel used in construction.

[0018] The components include: shell 1, bracket 2, first screen cylinder 3, second screen cylinder 4, third screen cylinder 5, baffle 6, connecting rod 7, connecting seat 8, drive shaft 9, support 10, geared motor 11, baffle 12, discharge hopper 13, feeding hopper 14, dust hood 15, collar 16, frame 17, guide wheel 18, and groove 19. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4In this embodiment of the present invention, a multi-stage screening device for sand and gravel used in construction includes a housing 1 fixedly mounted on a support 2. A third screen cylinder 5 is rotatably mounted inside the housing 1, and a second screen cylinder 4 is fixedly connected inside the third screen cylinder 5. A first screen cylinder 3 is fixedly mounted inside the second screen cylinder 4. Screen holes are perforated on the outer walls of the first screen cylinder 3, the second screen cylinder 4, and the third screen cylinder 5. The diameter of the screen holes in the first screen cylinder 3 is larger than that in the second screen cylinder 4, and the diameter of the screen holes in the second screen cylinder 4 is larger than that in the third screen cylinder 5. The discharge end of the second screen cylinder 4 extends from inside the third screen cylinder 5, and the discharge end of the first screen cylinder 3 extends from inside the second screen cylinder 4. The housing 1... The outer wall of the housing 1 is fixedly connected to a geared motor 11 via a support 10. The first screen cylinder 3 is connected to the drive shaft of the geared motor 11. Four discharge hoppers 13 are arranged along the length of the bottom of the housing 1. The discharge ends of the first screen cylinder 3, the second screen cylinder 4, and the third screen cylinder 5 are located directly above the corresponding discharge hoppers 13. A feeding hopper 14 is fixedly inserted through the outer wall of the housing 1. The discharge end of the feeding hopper 14 is located inside the feeding end of the first screen cylinder 3. A dust collection hood 15 is fixedly connected to the top of the housing 1. The air outlet of the dust collection hood 15 is connected to the air inlet of an industrial dust removal device through a pipe. The industrial dust removal device is preferably a cyclone dust collector with an induced draft fan installed at the air outlet, or a bag dust collector, etc., can also be selected.

[0021] By adopting the above-mentioned scheme, when using this utility model, after starting the induced draft fan and the reduction motor 11, the sand and gravel to be screened are fed into the first screen cylinder 3 through the feeding hopper 14 and roll down to the discharge end of the first screen cylinder 3. Driven by the reduction motor 11, the first screen cylinder 3, the second screen cylinder 4, and the third screen cylinder 5 will rotate simultaneously to screen the sand and gravel three times. The screened sand and gravel will be discharged from the corresponding discharge hopper 13. Under the action of the induced draft fan, the air inside the shell 1 will be continuously drawn into the cyclone dust collector, and the outside air will enter the shell 1 through the feeding hopper 14 and the discharge hopper 13. Therefore, most of the dust generated during the screening process will be sucked into the cyclone dust collector by the dust suction hood 15, thereby reducing pollution to the surrounding environment and achieving good results.

[0022] Specific combination Figure 1 and Figure 4 In one embodiment of the present invention, a baffle 12 is fixedly connected inside the housing 1 between every two adjacent discharge hoppers 13. The top of the baffle 12 is provided with a groove. The discharge ends of the first screen cylinder 3, the second screen cylinder 4 and the third screen cylinder 5 pass through the corresponding grooves, and the inner diameter of the groove is adapted to the outer diameter of the corresponding first screen cylinder 3, the second screen cylinder 4 and the third screen cylinder 5.

[0023] By setting baffle 12 and groove, the sand and gravel discharged from the discharge ends of the first screen cylinder 3, the second screen cylinder 4 and the third screen cylinder 5 and the screen holes of the third screen cylinder 5 can be isolated so that the screened sand and gravel can be accurately discharged from the corresponding discharge hopper 13.

[0024] Specific combination Figure 2 and Figure 3 In one embodiment of this utility model, a baffle 6 is fixedly sleeved on the outer wall of the feeding end of the first screen cylinder 3. The second screen cylinder 4 and the third screen cylinder 5 are both fixedly connected to the baffle 6. The feeding end of the third screen cylinder 5 is fixedly connected to the second screen cylinder 4 through multiple connecting rods 7. The feeding end of the second screen cylinder 4 is fixedly connected to the first screen cylinder 3 through multiple connecting rods 7. The output shaft of the reduction motor 11 passes through the housing 1 and is fixedly connected to a transmission shaft 9 through a coupling. A connecting seat 8 is fixedly connected to the end of the transmission shaft 9 away from the reduction motor 11. The connecting seat 8 is fixedly connected to the feeding end of the first screen cylinder 3 through multiple connecting rods 7.

[0025] The baffle and multiple connecting rods 7 ensure the reliability of the fixed connection between the first screen cylinder 3, the second screen cylinder 4 and the third screen cylinder 5. The transmission shaft 9 and the connecting seat 8 enable the geared motor 11 to drive the first screen cylinder 3 to rotate.

[0026] Specific combination Figure 1-3 In one embodiment of this utility model, a collar 16 is fixedly sleeved on the outer wall of the third screen cylinder 5 near both ends. A frame 17 is fixedly connected to the corresponding position of the collar 16 inside the housing 1. The collar 16 is located inside the corresponding frame 17. A plurality of guide wheels 18 are installed on the inner wall of the frame 17. A groove 19 is opened on the outer peripheral wall of the guide wheel 18. The outer edge of the collar 16 is located in the groove 19.

[0027] The engagement of the collar 16 and the groove 19 on the guide wheel 18 prevents the third screen cylinder 5 from moving within the housing 1, thereby ensuring the stability of the rotation of the first screen cylinder 3, the second screen cylinder 4 and the third screen cylinder 5.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing 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 invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage screening device for sand and gravel used in construction, characterized in that: The system includes a housing (1) fixedly mounted on a bracket (2). A third sieve cylinder (5) is rotatably mounted inside the housing (1) and is inclinedly arranged. A second sieve cylinder (4) is fixedly connected inside the third sieve cylinder (5). A first sieve cylinder (3) is fixedly mounted inside the second sieve cylinder (4). The discharge end of the second sieve cylinder (4) extends from inside the third sieve cylinder (5), and the discharge end of the first sieve cylinder (3) extends from inside the second sieve cylinder (4). A geared motor (11) is fixedly connected to the outer wall of the housing (1) via a support (10). The first sieve cylinder (3) and the geared motor (11) are connected... The drive shaft of 11) is connected to the drive shaft. The bottom of the housing (1) is provided with four discharge hoppers (13) along its length. The discharge ends of the first screen cylinder (3), the second screen cylinder (4) and the third screen cylinder (5) are located directly above the corresponding discharge hoppers (13). The outer wall of the housing (1) is fixedly provided with a feeding hopper (14). The discharge end of the feeding hopper (14) is located inside the feeding end of the first screen cylinder (3). The top of the housing (1) is fixedly connected with a dust collection hood (15). The air outlet of the dust collection hood (15) is connected to the air inlet of the industrial dust removal equipment through a pipe.

2. The multi-stage screening device for sand and gravel used in construction according to claim 1, characterized in that: The outer walls of the first sieve cylinder (3), the second sieve cylinder (4) and the third sieve cylinder (5) are all provided with sieve holes, and the sieve hole diameter of the first sieve cylinder (3) is larger than that of the second sieve cylinder (4), and the sieve hole diameter of the second sieve cylinder (4) is larger than that of the third sieve cylinder (5).

3. The multi-stage screening device for sand and gravel used in construction according to claim 1, characterized in that: Inside the housing (1), a baffle (12) is fixedly connected between every two adjacent discharge hoppers (13). The top of the baffle (12) has a groove. The discharge ends of the first screen cylinder (3), the second screen cylinder (4), and the third screen cylinder (5) pass through the corresponding grooves, and the inner diameter of the groove is adapted to the outer diameter of the corresponding first screen cylinder (3), second screen cylinder (4), and third screen cylinder (5).

4. The multi-stage screening device for sand and gravel used in construction according to claim 1, characterized in that: A baffle (6) is fixedly sleeved on the outer wall of the feeding end of the first screen cylinder (3). The second screen cylinder (4) and the third screen cylinder (5) are both fixedly connected to the baffle (6). The feeding end of the third screen cylinder (5) is fixedly connected to the second screen cylinder (4) through multiple connecting rods (7). The feeding end of the second screen cylinder (4) is fixedly connected to the first screen cylinder (3) through multiple connecting rods (7). The output shaft of the geared motor (11) is inserted into the housing (1) and then fixedly connected to the transmission shaft (9) through a coupling. The end of the transmission shaft (9) away from the geared motor (11) is fixedly connected to the connecting seat (8). The connecting seat (8) is fixedly connected to the feeding end of the first screen cylinder (3) through multiple connecting rods (7).

5. The multi-stage screening device for sand and gravel used in construction according to claim 1, characterized in that: The outer wall of the third screen cylinder (5) is fixedly fitted with collars (16) near both ends. The housing (1) is fixedly connected with a frame (17) at the corresponding position of the collar (16). The collar (16) is located in the corresponding frame (17). Multiple guide wheels (18) are installed on the inner wall of the frame (17). The outer peripheral wall of the guide wheel (18) is provided with a groove (19). The outer edge of the collar (16) is located in the groove (19).

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