Gravel multi-stage screening device

Abstract

The utility model discloses a gravel multistage screening device which comprises a screening box, vibration motors are installed on the two sides of the outer wall of the screening box, a first screen is fixedly connected to the inner wall of the screening box, and a second screen is arranged below the first screen. The utility model relates to the technical field of gravel separation, and the gravel multi-stage screening device achieves accurate adjustment of the inclination angle of the screening plate through cooperation of the threaded rod, the transmission plate, the connecting plate, the camera obscura, the T-shaped rod, the second spring, the L-shaped plate and the transverse column, and solves the problem that a traditional gravel multi-stage screening device is not prone to being damaged in the using process. The problems that a worker adds gravel raw materials into the gravel multi-stage sorting device for multi-stage sorting, when the angle of a sieve plate needs to be adjusted, the adjustment precision can not be guaranteed possibly through manual adjustment of the angle of the sieve plate, the situation that the inclination angle of the sieve plate is not reasonable possibly occurs, and therefore the flowing speed and the screening precision of the materials can be affected are solved.

Description

Technical Field

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

[0002] Sand and gravel refer to a loose mixture of sand and gravel. Sand making equipment crushes the stone into the required materials. Due to its good hardness and stable chemical properties, it is often used as a high-quality building material and concrete raw material and is widely used in housing, roads and other fields. Sand and gravel screening devices are required during sand making.

[0003] In traditional sand and gravel screening devices, workers add sand and gravel raw materials into the device, and the device separates sand and gravel that meet the specifications through the cooperation of a vibrating motor and a screen.

[0004] In traditional multi-stage sand and gravel screening devices, workers add sand and gravel raw materials into the device for multi-stage sorting. When it is necessary to adjust the screen plate angle, manual adjustment may not guarantee the accuracy of the adjustment, and the screen plate tilt angle may be unreasonable, which will affect the material flow rate and screening accuracy. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a multi-stage sand and gravel screening device. This solves the problem that in traditional multi-stage sand and gravel screening devices, when workers add sand and gravel raw materials into the device for multi-stage sorting, manual adjustment of the screen plate angle may not guarantee the accuracy of the adjustment, potentially resulting in an unreasonable screen plate tilt angle, which in turn affects the material flow rate and screening accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage sand and gravel screening device, comprising a screening box, with vibrating motors installed on both sides of the outer wall of the screening box, a first screen fixedly connected to the inner wall of the screening box, a second screen disposed below the first screen, the second screen fixedly connected to the lower part of the inner wall of the screening box, support feet disposed at the four corners of the bottom of the screening box, a first servo motor disposed on one side of the bottom of the screening box, and a lifting assembly disposed on the top of the first servo motor, the lifting assembly comprising: a threaded rod fixedly connected to the output end of the first servo motor; a transmission plate threadedly connected to the outer wall of the threaded rod; two connecting plates, each rotatably connected to both sides of the transmission plate via sealed bearings; and two dark boxes, with two supports located near the first servo motor. Above the foot, and fixedly connected to the top of the two connecting plates on the side away from the transmission plate; four T-shaped rods, two of which are fixedly connected to the top of the dark box, and the other two are fixedly connected to the top of the supporting foot; four second springs, all of which are sleeved on the outer wall of the T-shaped rods; four L-shaped plates, the bottom of which are respectively sleeved on the outer wall of the four T-shaped rods; four horizontal columns, which respectively penetrate the side wall of the four L-shaped plates, and the side walls are respectively fixedly connected to the front and back sides of the outer wall of the screening box; a flow guiding unit is set on the top of the screening box; wherein, the first servo motor drives the threaded rod to rotate, and through the cooperation of the threaded rod, the transmission plate and the connecting plate, drives the dark box and the second springs, so that the height of the T-shaped rods changes, and through the cooperation of the L-shaped plates and the horizontal columns, the tilt angle of the screening box changes.

[0007] Preferably, the top of the screening box is provided with a feed inlet, and the flow guiding unit is disposed inside the feed inlet. The flow guiding unit includes: two second servo motors, each fixedly connected to the top of the screening box away from the feed inlet; two transmission rods, each fixedly connected to the output end of one of the two second servo motors, and both ends of which are rotatably connected to the inner wall of the feed inlet through sealed bearings; and two flow guiding plates, each fixedly connected to the outer wall of one of the two transmission rods. The angle of the flow guiding plates changes through the cooperation of the second servo motors and the transmission rods.

[0008] Preferably, each of the four bottom corners of the screening box is fixedly connected to a support column, each of the four support columns is fixedly connected to a first spring, each of the four first springs is fixedly connected to a support base, and each support base is fixedly connected to a base plate.

[0009] Preferably, the base plate has a groove on the side near the first servo motor, and the first servo motor is fixedly connected to the inner wall of the groove via a motor mount.

[0010] Preferably, both sides of the inner wall of the two dark boxes are provided with sliding grooves.

[0011] Preferably, the tops of the two support feet are rotatably connected to limit rods via pins, the tops of the two limit rods pass through the bottom of the connecting plate and the dark box in sequence, and sliders are fixedly connected to both sides of the outer walls of the two limit rods, and the outer walls of the four sliders are slidably connected to the inner walls of the four slide grooves respectively.

[0012] Beneficial effects

[0013] This utility model provides a multi-stage sand and gravel screening device. It has the following advantages: This multi-stage sand and gravel screening device, through the cooperation of a threaded rod, transmission plate, connecting plate, dark box, T-shaped rod, second spring, L-shaped plate, and cross column, achieves accurate adjustment of the screen plate inclination angle. This solves the problem of traditional multi-stage sand and gravel screening devices where, during operation, workers add sand and gravel raw materials to the device for multi-stage sorting. When adjusting the screen plate angle, manual adjustment may not guarantee accuracy, potentially resulting in an unreasonable screen plate inclination angle, which would affect the material flow rate and screening accuracy.

[0014] By coordinating the second servo motor, the transmission rod, and the guide plate, the sand and gravel raw materials fall to a pre-set position through the guide plate. This solves the problem that when the angle of the traditional multi-stage sand and gravel sorting device is adjusted, the angle deviates from the initial angle, which may cause the sand and gravel raw materials to fall to a different position, thus affecting the screening accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 An exterior schematic diagram;

[0017] Figure 3 for Figure 1 A schematic diagram of the structure of the first screen, the second screen, and the screening box;

[0018] Figure 4 for Figure 1 Schematic diagram of the threaded rod, transmission plate and connecting plate;

[0019] Figure 5 for Figure 1 A schematic diagram of the structure of the middle support foot, limit rod and slider.

[0020] In the diagram: 1. Screening box; 11. Vibrating motor; 12. Feed inlet; 13. First screen; 14. Second screen; 15. Support column; 16. First spring; 17. Support base; 18. Base plate; 181. Groove; 2. First servo motor; 3. Lifting assembly; 31. Threaded rod; 32. Transmission plate; 33. Connecting plate; 34. Dark box; 341. Slide groove; 35. T-shaped rod; 36. Second spring; 37. L-shaped plate; 38. Horizontal column; 39. Flow guiding unit; 391. Second servo motor; 392. Transmission rod; 393. Flow guiding plate; 4. Support foot; 41. Limiting rod; 42. Slider. Detailed Implementation

[0021] 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.

[0022] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0023] In traditional multi-stage sand and gravel screening devices, workers add sand and gravel raw materials into the device for multi-stage sorting. When it is necessary to adjust the screen plate angle, manual adjustment may not guarantee the accuracy of the adjustment, and the screen plate tilt angle may be unreasonable, which will affect the material flow rate and screening accuracy.

[0024] In view of this, the present invention provides a multi-stage sand and gravel screening device. This multi-stage sand and gravel screening device, through the cooperation of threaded rod, transmission plate, connecting plate, dark box, T-shaped rod, second spring, L-shaped plate and cross column, achieves accurate adjustment of the screen plate inclination angle. It solves the problem that in the traditional multi-stage sand and gravel screening device, when the operator adds sand and gravel raw materials into the multi-stage screening device for multi-stage sorting, when it is necessary to adjust the screen plate angle, the manual adjustment of the screen plate angle may not be able to guarantee the accuracy of the adjustment, and the screen plate inclination angle may be unreasonable, which will affect the material flow speed and screening accuracy.

[0025] Example 1, by Figure 1-5As can be seen, the multi-stage sand and gravel screening device in this case includes a screening box 1. Vibrating motors 11 are installed on both sides of the outer wall of the screening box 1. A first screen 13 is fixedly connected to the inner wall of the screening box 1. A second screen 14 is arranged below the first screen 13 and fixedly connected to the lower part of the inner wall of the screening box 1. Support feet 4 are provided at the four corners of the bottom of the screening box 1. A first servo motor 2 is arranged on one side of the bottom of the screening box 1. A lifting assembly 3 is arranged on the top of the first servo motor 2. The lifting assembly 3 includes: a threaded rod 31, fixedly connected to the output end of the first servo motor 2; a transmission plate 32, threadedly connected to the outer wall of the threaded rod 31; two connecting plates 33, which are rotatably connected to both sides of the transmission plate 32 through sealed bearings; and two dark boxes 34, which are located above the two support feet 4 on the side near the first servo motor 2 and fixedly connected to the two connecting plates 33. The top of the connecting plate 33 is away from the transmission plate 32; four T-shaped rods 35 are provided, two of which are fixedly connected to the top of the dark box 34, and the other two are fixedly connected to the top of the support foot 4; four second springs 36 are provided, all of which are sleeved on the outer wall of the T-shaped rods 35; four L-shaped plates 37 are provided, and their bottoms are respectively sleeved on the outer wall of the four T-shaped rods 35; four horizontal columns 38 are provided, which respectively penetrate the side wall of the four L-shaped plates 37, and the side wall is respectively fixedly connected to the front and back sides of the outer wall of the screening box 1; a flow guiding unit 39 is provided on the top of the screening box 1; wherein, the first servo motor 2 drives the threaded rod 31 to rotate, and through the cooperation of the threaded rod 31, the transmission plate 32 and the connecting plate 33, the dark box 34 and the second springs 36 are driven, so that the height of the T-shaped rods 35 changes, and through the cooperation of the L-shaped plates 37 and the horizontal columns 38, the tilt angle of the screening box 1 is changed;

[0026] In the specific implementation process, it is worth noting that the screening box 1 has a trapezoidal side and is set at an incline. A feed inlet 12 is set at the top, and a discharge outlet is set on one side. The model of the vibrating motor 11 is selected according to actual needs, as long as it meets the operational requirements. The models of the first screen 13 and the second screen 14 can be selected according to actual needs, with the mesh size meeting the operational requirements. The model of the first servo motor 2 is selected according to actual needs, as long as it meets the operational requirements. The connecting plate 33 is cylindrical on the side near the threaded rod 31, and has a through groove on the side away from the threaded rod 31. A horizontal plate is set at the top of the dark box 34 and fixed with bolts. The top of the T-shaped rod 35 is circular. The second spring 36... The material is carbon spring steel. The elastic coefficient of the second spring 36 is selected according to actual needs to meet the working requirements. When a bump occurs, the second spring 36 moves along the outer wall of the T-shaped rod 35. The spring is deformed by the force. During this process, the spring will repeatedly rebound. Through the cooperation of the second spring 36 and the T-shaped rod 35, the kinetic energy of this part is consumed, which plays a damping role and thus achieves the shock absorption effect. The bottom and side walls of the L-shaped plate 37 are penetrated by the T-shaped rod 35 and the cross column 38, respectively. This allows the angle of the first screen 13 and the second screen 14 to be precisely adjusted by changing the angle of the screening box 1, thereby improving the accuracy of adjusting the angle of the multi-stage sand and gravel screening device.

[0027] Furthermore, a feed inlet 12 is provided at the top of the screening box 1, and a flow guiding unit 39 is disposed inside the feed inlet 12. The flow guiding unit 39 includes: two second servo motors 391, both of which are fixedly connected to the top of the screening box 1 away from the feed inlet 12; two transmission rods 392, which are respectively fixedly connected to the output ends of the two second servo motors 391, and both ends are rotatably connected to the inner wall of the feed inlet 12 through sealed bearings; and two guide plates 393, which are respectively fixedly connected to the outer walls of the two transmission rods 392. The angle of the guide plates 393 changes through the cooperation of the second servo motors 391 and the transmission rods 392.

[0028] In the specific implementation process, it is worth noting that the model of the second servo motor 391 is selected according to actual needs, as long as it meets the working requirements. The transmission rod 392 is set in parallel, and one side of the outer wall of the guide plate 393 is processed into a slope to facilitate the flow of sand and gravel raw materials. This improves the accuracy of the feed drop position of the multi-stage sand and gravel screening device and ensures the screening accuracy of the multi-stage sand and gravel screening device.

[0029] Furthermore, support columns 15 are fixedly connected to the four corners of the bottom of the screening box 1, and first springs 16 are fixedly connected to the bottom of the four support columns 15. Support seats 17 are fixedly connected to the bottom of the four first springs 16, and a base plate 18 is fixedly connected to the bottom of the support seats 17.

[0030] In the specific implementation process, it is worth noting that the material of the first spring 16 is carbon spring steel. The elastic coefficient of the first spring 16 is selected according to actual needs, as long as it meets the working requirements. Through the cooperation of the support column 15, the first spring 16 and the support seat 17, the kinetic energy of this part is consumed, which plays a damping role, thereby achieving the effect of shock reduction and improving the service life of the multi-stage sand and gravel screening device.

[0031] Specifically, when screening of sand and gravel raw materials is required, the operator first connects the external power supply to the vibrating motor 11, starts the vibrating motor 11, and adds the sand and gravel raw materials into the screening box 1. The vibrating motor 11 drives the first screen 13 and the second screen 14 to vibrate. Through the cooperation of the first screen 13 and the second screen 14, the sand and gravel raw materials are screened, realizing multi-stage screening of sand and gravel. The screened sand and gravel leave the interior of the screening box 1 through the discharge port. When the screening box 1 vibrates, the cooperation of the support column 15, the first spring 16, and the support seat 17 reduces vibration in the screening box 1, thereby improving the service life of the sand and gravel sorting device. When screening of sand and gravel is not required... When screening the material, simply turn off the power to the vibrating motor 11. Next, when it is necessary to adjust the angles of the first screen 13 and the second screen 14, the operator connects the external power supply to the first servo motor 2 and starts it. The first servo motor 2 drives the threaded rod 31 to rotate, which in turn drives the transmission plate 32 to rise. The transmission plate 32 then drives the connecting plate 33 to rise, which in turn drives the dark box 34 to rise. The dark box 34 then drives the T-shaped rod 35 to rise, which in turn drives the L-shaped plate 37 to rise via the second spring 36. The L-shaped plate 37 then drives the horizontal column 38 to rise, which in turn drives one side of the screening box 1 to rise. After one side of the screening box 1 rises, the screening box 1... When the angles of the first screen 13 and the second screen 14 inside change and reach the angle required by the operator, the first servo motor 2 stops. When it is necessary to restore the angles of the first screen 13 and the second screen 14, the operator can simply reconnect the first servo motor 2 and reverse the above process. This improves the accuracy of adjusting the angle of the multi-stage sand and gravel screening device. Furthermore, when the angle of the screening box 1 changes, the angle of the feed inlet 12 also changes. If it is desired to keep the landing point of the sand and gravel material inside the screening box 1 constant, the sand and gravel material needs to be guided. The operator connects the external power supply to the second servo motor 391 and starts the second servo motor. The first servo motor 391 drives the transmission rod 392 to rotate, which in turn drives the guide plate 393 to rotate. When it is not necessary to guide the sand and gravel raw materials, the operator can use the two second servo motors 391 to keep the guide plate 393 in a vertical position and turn off the power of the second servo motors 391. This ensures the screening accuracy of the multi-stage sand and gravel sorting device. Finally, when the multi-stage sand and gravel sorting device is not in use, the guide plate 393 can be positioned parallel to the bottom of the screening box 1, with the ends of the two guide plates 393 touching, which prevents foreign objects from falling into the interior of the screening box 1 and increases the safety of the multi-stage sand and gravel sorting device.

[0032] Example 2, by Figure 1-5 It can be seen that a groove 181 is provided on the side of the base plate 18 near the first servo motor 2, and the first servo motor 2 is fixedly connected to the inner wall of the groove 181 through a motor seat.

[0033] In the specific implementation process, it is worth noting that the motor base of the first servo motor 2 is fixedly connected to the inner wall of the groove 181 by bolts, which improves the convenience of maintenance of the multi-stage sand and gravel screening device.

[0034] Furthermore, grooves 341 are provided on both sides of the inner walls of the two dark boxes 34;

[0035] In the specific implementation process, it is worth noting that the chute 341 limits the slider 42, thereby improving the structural stability of the multi-stage sand and gravel screening device.

[0036] Furthermore, the tops of the two support feet 4 are rotatably connected to limit rods 41 via pins. The tops of the two limit rods 41 pass through the bottom of the connecting plate 33 and the dark box 34 in sequence. Slider 42 is fixedly connected to both sides of the outer wall of the two limit rods 41. The outer walls of the four sliders 42 are slidably connected to the inner walls of the four slide grooves 341 respectively.

[0037] In the specific implementation process, it is worth noting that the limiting rod 41, through the cooperation of the sliding groove 341 and the slider 42, limits the operation of the dark box 34, further improving the structural stability of the multi-stage sand and gravel screening device.

[0038] Specifically, the motor base of the first servo motor 2 is fixedly connected to the inner wall of the groove 181 by bolts, which improves the convenience of maintenance of the multi-stage sand and gravel screening device. The slide 341 limits the slider 42, and the limiting rod 41 limits the operation of the dark box 34 through the cooperation of the slide 341 and the slider 42, thereby improving the structural stability of the multi-stage sand and gravel screening device.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage sand and gravel screening device, comprising a screening box (1), characterized in that: Vibration motors (11) are installed on both sides of the outer wall of the sieve box (1). A first screen (13) is fixedly connected to the inner wall of the sieve box (1). A second screen (14) is provided below the first screen (13). The second screen (14) is fixedly connected to the lower part of the inner wall of the sieve box (1). Support feet (4) are provided at the four corners of the bottom of the sieve box (1). A first servo motor (2) is provided on one side of the bottom of the sieve box (1). A lifting assembly (3) is provided on the top of the first servo motor (2). The lifting assembly (3) includes: The threaded rod (31) is fixedly connected to the output end of the first servo motor (2); The transmission plate (32) is threadedly connected to the outer wall of the threaded rod (31); There are two connecting plates (33), which are rotatably connected to both sides of the transmission plate (32) via sealed bearings; There are two dark boxes (34), located above the two support feet (4) on the side close to the first servo motor (2), and respectively fixedly connected to the top of the two connecting plates (33) on the side away from the transmission plate (32); Four T-shaped rods (35) are provided, two of which are fixedly connected to the top of the dark box (34), and the other two are fixedly connected to the top of the support leg (4); The second spring (36) is provided in four parts, and each part is sleeved on the outer wall of the T-shaped rod (35); Four L-shaped plates (37) are provided, and their bottoms are respectively fitted onto the outer walls of the four T-shaped rods (35); There are four horizontal columns (38), which pass through the side walls of the four L-shaped plates (37) respectively, and the side walls are fixedly connected to the front and back sides of the outer wall of the sieve box (1); A flow guiding unit (39) is disposed on the top of the screening box (1); The first servo motor (2) drives the threaded rod (31) to rotate. Through the cooperation of the threaded rod (31), the transmission plate (32) and the connecting plate (33), the dark box (34) and the second spring (36) are driven to change the height of the T-shaped rod (35). Through the cooperation of the L-shaped plate (37) and the horizontal column (38), the tilt angle of the screening box (1) is changed.

2. The multi-stage screening device for sand and gravel according to claim 1, characterized in that: The top of the screening box (1) is provided with a feed inlet (12), and the flow guiding unit (39) is disposed inside the feed inlet (12). The flow guiding unit (39) includes: There are two second servo motors (391), both of which are fixedly connected to the top of the screening box (1) on the side away from the feed inlet (12); There are two transmission rods (392), which are fixedly connected to the output ends of the two second servo motors (391) respectively, and both ends are rotatably connected to the inner wall of the feed port (12) through sealed bearings; Two guide plates (393) are provided and are respectively fixedly connected to the outer walls of the two transmission rods (392); The angle of the guide plate (393) changes through the cooperation of the second servo motor (391) and the transmission rod (392).

3. The multi-stage screening device for sand and gravel according to claim 1, characterized in that: The four corners of the bottom of the screening box (1) are fixedly connected with support columns (15), the bottom of the four support columns (15) are fixedly connected with first springs (16), the bottom of the four first springs (16) are fixedly connected with support seats (17), and the bottom of the support seats (17) is fixedly connected with a base plate (18).

4. The multi-stage screening device for sand and gravel according to claim 3, characterized in that: The base plate (18) has a groove (181) on the side near the first servo motor (2), and the first servo motor (2) is fixedly connected to the inner wall of the groove (181) through a motor seat.

5. The multi-stage screening device for sand and gravel according to claim 1, characterized in that: Both inner walls of the two dark boxes (34) are provided with grooves (341).

6. The multi-stage screening device for sand and gravel according to claim 5, characterized in that: The tops of the two support feet (4) are rotatably connected to limit rods (41) via pins. The tops of the two limit rods (41) pass through the bottom of the connecting plate (33) and the dark box (34) in sequence. Slider blocks (42) are fixedly connected to both sides of the outer wall of the two limit rods (41). The outer walls of the four sliders (42) are slidably connected to the inner walls of the four grooves (341).

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