Sand screening device for wet-mixed mortar production

Abstract

The utility model provides a sieve sand device for wet mixing mortar production, including first support frame, first support frame top is equipped with second support frame and both one end rotationally links, is provided with the lifting hydraulic cylinder between first support frame and second support frame and is inclined, the both ends of lifting hydraulic cylinder are rotationally linked with the connecting frame respectively, two connecting frames are installed in first support frame and second support frame respectively, make second support frame rotate around first support frame under the drive of lifting hydraulic cylinder, second support frame top is equipped with drum screening device, and it changes the inclination angle along with first support frame rotation. The utility model discloses when using, the screen cloth can realize the lifting under the action of lifting hydraulic cylinder, so can find the best screening angle when screening quartz stone through the mode for adjusting the inclination angle of screen cloth, thereby improves screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sand screening technology, specifically a sand screening device for wet-mixed mortar production. Background Technology

[0002] A drum screen is a commonly used material screening device, mainly used to classify materials according to particle size, and is also frequently seen in the screening of quartz sand. The screening efficiency of a drum screen is related to the inclination angle of the screen mesh. The inclination angle of the drum screen has a significant impact on the screening effect; however, a higher inclination angle is not always better. Factors affecting screening efficiency include material flowability, screening accuracy, and output.

[0003] First, the tilt angle directly affects the flow speed and direction of the material on the screen. If the tilt angle is too small, the material flows slowly, easily accumulates, and reduces screening efficiency; if the tilt angle is too large, the material flows too fast, reducing the contact time with the screen, which may also lead to poor screening results. Therefore, a reasonable tilt angle can ensure that the material flows evenly and stably on the screen, improving screening efficiency.

[0004] Secondly, the tilt angle also affects screening accuracy. If the tilt angle is too small, the material residence time is long, which is beneficial for fine particles to pass through the screen, but may lead to screen clogging and wear; if the tilt angle is too large, the material residence time is short, which is not conducive to the passage of fine particles, thus reducing screening accuracy. Therefore, choosing a suitable tilt angle can achieve high screening accuracy while ensuring screening efficiency.

[0005] Finally, the tilt angle also affects output. A smaller tilt angle results in slower material flow and longer screening time, which may reduce output. A larger tilt angle results in faster material flow and shorter screening time, which is beneficial for increasing output. However, an excessively large tilt angle may affect the screening effect. Therefore, it is necessary to select a suitable tilt angle to improve output while ensuring screening effect.

[0006] Based on the above, it can be concluded that different materials have different requirements for the tilt angle. For example, factors such as the specific gravity, viscosity, and particle size of the material will affect the selection of the tilt angle. Materials with a lighter specific gravity or higher viscosity can have a slightly larger installation angle; for heavier materials, the installation angle should be smaller. Therefore, adjusting the tilt angle of the screen can change the screening efficiency. However, the screens of current rotary drum screens are fixed and cannot be adjusted in angle, allowing screening operations only at a certain angle. Therefore, we propose a sand screening device for wet-mixed mortar production. Utility Model Content

[0007] This utility model provides a sand screening device for wet-mixed mortar production, which allows the screen to be raised and lowered by a lifting hydraulic cylinder. This allows the optimal screening angle to be found when screening quartz by adjusting the screen's tilt angle, thereby improving screening efficiency and solving the problems mentioned in the background art.

[0008] The technical solution of this utility model is implemented as follows: A sand screening device for wet-mixed mortar production is designed, including a first support frame, a second support frame is provided on the top of the first support frame and the two are rotatably connected at one end, a lifting hydraulic cylinder is inclined between the first support frame and the second support frame, the two ends of the lifting hydraulic cylinder are respectively rotatably connected to connecting frames, the two connecting frames are respectively installed in the first support frame and the second support frame, and the second support frame is rotated around the first support frame under the drive of the lifting hydraulic cylinder, a drum screening device is provided on the top of the second support frame, which changes its tilt angle as the first support frame rotates, and a feeding device for feeding material into the drum screening device is provided at the end of the first support frame away from the second support frame.

[0009] Preferably, a wheel axle is provided at the bottom of one end of the first support frame, and a traveling wheel is rotatably provided at both ends of the wheel axle. A vertically downward support shaft is rotatably installed at the other end of the first support frame. The support shaft extends to the bottom of the first support frame and its bottom is connected to the wheel bracket. Steering wheels are rotatably installed at both ends of the wheel bracket, and a traction frame is rotatably installed in the middle of the wheel bracket.

[0010] Preferably, the first support frame has supports on both sides of the end away from the walking wheel, a support hydraulic cylinder is vertically mounted on the top of the support, and a support plate is mounted on the bottom of the support hydraulic cylinder.

[0011] Preferably, the drum screening device includes a support frame located above the second support frame. The two sides of the support frame are connected to the second support frame through multiple first brackets. At least two drive wheels are symmetrically arranged at the top of each end of the support frame. The drive wheels are rotatably mounted in a third seat body, which is connected to the top of the support frame. The drum screening device also includes support cylinders located above each end of the support frame. The two support cylinders are coaxially arranged and connected by a cylindrical screen. The two support cylinders are placed on the drive wheels, which are symmetrically distributed on both sides of the support cylinders. The support cylinders can roll freely on the drive wheels. A drive device is provided below one end of the support frame. The drive device is connected to the drive shaft through a chain drive mechanism. The drive shaft is connected to one end of the drive wheel.

[0012] Preferably, the cylindrical screen includes at least one support ring coaxially disposed between two support cylinders. The two support cylinders are connected by multiple rods parallel to their axis. The support ring is connected to the rods, and a screen is provided on the surface of the rods.

[0013] Preferably, support wheels are provided on both sides of the support ring, and the support wheels are rotatably installed in the first seat body. The first seat body is located on the top of the bearing frame, and the drive wheel and the support wheel located on one side of the bearing frame are connected by a transmission shaft.

[0014] Preferably, each support cylinder has an annular retaining edge coaxially provided at one end near the feeding device. The side of the annular retaining edge away from the feeding device contacts the limiting wheel. The axis of the limiting wheel is perpendicular to the support cylinder, while the axis of the drive wheel is parallel to the support cylinder. The limiting wheel is rotatably mounted in the second seat, which is located at the top of the bearing frame.

[0015] Preferably, the feeding device includes a feeding hopper located above the top of the end of the first support frame away from the second support frame. The height of the feeding hopper is higher than the height of the drum screening device. The two sides of the feeding hopper are connected to the first support frame through multiple second brackets. A feeding channel is provided at the bottom of the feeding hopper, which is inclined downward and placed inside the support cylinder. There is a certain distance between the feeding channel and the inner wall of the support cylinder to prevent the support cylinder from touching the feeding channel when it rotates with the second support frame.

[0016] Preferably, the surface of the support ring is provided with an annular groove, and the support wheel is placed in the annular groove.

[0017] Preferably, a material hopper is provided below the support frame, the bottom of the material hopper has a "V" shaped structure, and a downward inclined guide chute is provided at the bottom of the "V" shaped structure.

[0018] Compared with existing technologies, this invention, when in use, involves placing quartz stone in the feed hopper, and then allowing quartz sand to slide down the feed channel into the support cylinder. As the support cylinder tumbles, the quartz sand falls along the screen. Quartz sand that matches the particle diameter falls through the screen, while that that does not fall from the bottom, thus achieving screening. During the screening process, the second support frame can be raised and lowered by a lifting hydraulic cylinder. This allows for adjustment of the screen's tilt angle, finding the optimal screening angle for the quartz stone and improving screening efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of one side of the present invention.

[0021] Figure 2This is a schematic diagram of the structure on the other side of this utility model.

[0022] Figure 3 This is a schematic diagram of the rear structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of part of this utility model. Figure 1 .

[0024] Figure 5 This is a schematic diagram of the structure of part of this utility model. Figure 2 .

[0025] In the diagram: 1. Traction frame; 2. Wheel bracket; 3. Steering wheel; 4. Support; 5. Support hydraulic cylinder; 6. Lifting hydraulic cylinder; 7. Material hopper; 8. First support frame; 9. Second support frame; 10. Traveling wheel; 11. First bracket; 12. Bearing frame; 13. Drive wheel; 14. Support cylinder; 15. Annular flange; 16. Support ring; 17. Support wheel; 18. Drive shaft; 19. Limiting wheel; 20. Feeding channel; 21. Feeding hopper; 22. Second bracket; 23. Support shaft; 24. Connecting frame; 25. Guide chute; 26. Wheel axle; 27. Drive shaft; 28. Support plate. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Reference Figures 1 to 5 This utility model provides a technical solution: a sand screening device for wet-mixed mortar production, including a drum screening device, such as... Figure 1 As shown, the drum screening device includes a support frame 12 and two support cylinders 14. At least two drive wheels 13 are symmetrically provided at the top of both ends of the support frame 12. The drive wheels 13 are distributed on both sides of the central axis of the support frame 12. The drive wheels 13 are rotatably installed in a third seat body, which is connected to the top of the support frame 12.

[0028] Two support cylinders 14 are located above the top of both ends of the bearing frame 12. The two support cylinders 14 are coaxially arranged and connected by a cylindrical screen. The specific structure of the cylindrical screen includes a support ring 16 coaxially arranged between the two support cylinders 14. There is at least one support ring 16. The two support cylinders 14 are connected by multiple rods parallel to their axis. The multiple rods are arranged in a ring around the support ring 16 and the support cylinder 14, thus forming a cylindrical structure. During installation, the support ring 16 is also connected to the rods. A screen is provided on the surface of the rods, so that the screen can also be supported by the rods, giving the screen sufficient strength. It should be noted that the connection between the screen and the support ring 16 and the support cylinder 14 needs to be sealed. The support ring 16 can strengthen the structural strength of the middle part of the drum screening device, making the drum screening device have a greater load-bearing capacity and preventing deformation and bending of the screen due to its large span.

[0029] like Figure 1 As shown, two support cylinders 14 are respectively placed on drive wheels 13, which are symmetrically distributed on both sides of the support cylinders 14. The support cylinders 14 can roll freely on the drive wheels 13, and the drive wheels 13 can support the support cylinders 14. Support wheels 17 are respectively provided on both sides of the support ring 16. The support wheels 17 are rotatably installed in the first seat body, which is set on the top of the bearing frame 12. In this way, the support ring 16 is supported by the support wheels 17. In other words, the middle part of the drum screening device is supported by the support wheels 17, which further increases the deformation resistance of the middle part of the drum screening device.

[0030] Furthermore, the drum screening device is positioned above the top of the second support frame 9, as shown below. Figure 1 and Figure 2 As shown, specifically, the support frame 12 is placed above the second support frame 9, and the two sides of the support frame 12 are connected to the second support frame 9 by multiple first brackets 11, so that the second support frame 9 and the support frame 12 become a whole. The second support frame 9 is located on top of the first support frame 8, and the first support frame 8 and the second support frame 9 are rotatably connected at one end, so that the second support frame 9 can rotate freely around one end of the first support frame 8.

[0031] To more easily control the rotation of the second support frame 9, such as Figure 1 and Figure 2As shown, a lifting hydraulic cylinder 6 is inclinedly provided between the first support frame 8 and the second support frame 9. The two ends of the lifting hydraulic cylinder 6 are rotatably connected to the connecting frame 24 respectively. The two connecting frames 24 are respectively installed in the first support frame 8 and the second support frame 9. Therefore, when the lifting hydraulic cylinder 6 extends or shortens, the lifting hydraulic cylinder 6 can rotate the second support frame 9 around the first support frame 8, thereby changing the angle between the first support frame 8 and the horizontal plane. Since the drum screening device is installed on the top of the bearing frame 12, and the bearing frame 12 and the second support frame 9 are an integral structure, the drum screening device will change its tilt angle as the first support frame 8 rotates.

[0032] Furthermore, in order to enable the drum screening device to rotate, such as Figure 5 As shown, a drive device is located below one end of the support frame 12. The drive device is connected to the drive shaft 27 via a chain drive mechanism, and the drive shaft 27 is connected to one end of the drive wheel 13. Figure 5 As shown, the specific structure of the drive device includes a motor and a reducer. The input shafts of the motor and the reducer are connected by a belt. Sprockets are provided on both the output shaft of the reducer and the drive shaft 27. The sprockets are connected by a chain, and the sprockets and the chain constitute a chain drive mechanism. During installation, the motor and the reducer are mounted on a support plate 28, and both ends of the support plate 28 are connected to the first bracket 11.

[0033] like Figure 1 and Figure 4 As shown, the drive wheel 13 and support wheel 17 located on one side of the support frame 12 are connected by a transmission shaft 18. Both ends of the transmission shaft 18 are equipped with universal joints, which allows the transmission shaft 18 to have self-correcting capabilities. Therefore, when the drive device rotates, it can drive the adjacent drive wheel 13 to rotate. This drive wheel 13 can drive the other drive wheels 13 and support wheels 17 to rotate through the transmission shaft 18, allowing multiple wheels to drive the screen at the same time.

[0034] Furthermore, such as Figure 1 As shown, a feeding device for feeding material into the drum screening device is provided at one end of the first support frame 8 away from the second support frame 9. The feeding device includes a feeding hopper 21 located above the top of the end of the first support frame 8 away from the second support frame 9. The height of the feeding hopper 21 is higher than the height of the drum screening device. The two sides of the feeding hopper 21 are connected to the first support frame 8 through multiple second brackets 22.

[0035] A downward-sloping feeding channel 20 is provided at the bottom of the feeding hopper 21 and placed inside the support cylinder 14. Since the drum screening device will rotate with the support frame 12, in actual use, there should be a certain distance between the feeding channel 20 located inside the support cylinder 14 and the inner wall of the support cylinder 14 to prevent the support cylinder 14 from contacting the feeding channel 20 when it rotates with the second support frame 9, and at the same time, to allow the support cylinder 14 to have enough operating space when it is raised and lowered.

[0036] It should be further noted that in actual use, the drum screening device is tilted. To prevent the support cylinder 14 from sliding down and falling, as... Figure 1 and Figure 2 As shown, an annular retaining edge 15 is coaxially provided at one end of each support cylinder 14 near the feeding device. The side of the annular retaining edge 15 away from the feeding device contacts the limiting wheel 19. The axis of the limiting wheel 19 is perpendicular to the support cylinder 14, while the axis of the drive wheel 13 is parallel to the support cylinder 14. The limiting wheel 19 is rotatably mounted in the second seat body, which is located on the top of the bearing frame 12. Therefore, during the rotation of the support cylinder 14, both sides of the support cylinder 14 are supported by the drive wheel 13, while the annular retaining edge 15 is supported by the limiting wheel 19, so that the support cylinder 14 can operate stably.

[0037] Based on the above embodiments, the specific screening process is as follows: the quartz to be screened is conveyed to the feed hopper 21 by a belt conveyor. The quartz sand in the feed hopper 21 slides down the feed channel 20 into the support cylinder 14. The quartz sand rotates with the support cylinder 14 and falls down the screen. Quartz sand that meets the particle diameter will fall from the screen, while quartz sand that does not meet the particle diameter will fall from the bottom of the screen, thereby achieving screening.

[0038] Most importantly, the screen's tilt angle can be adjusted during operation. The second support frame 9 can be raised and lowered by the lifting hydraulic cylinder 6. Therefore, when the lifting hydraulic cylinder 6 rises, the screen's tilt angle increases, increasing the tumbling and falling speed of the quartz stones within the screen. Conversely, when the lifting hydraulic cylinder 6 retracts, the screen's tilt angle decreases, increasing the residence time of the quartz stones within the screen. Thus, by adjusting the screen's tilt angle, the optimal screening angle can be found when screening quartz stones, thereby improving screening efficiency.

[0039] like Figure 2 and Figure 3 As shown, a material hopper 7 is located below the support frame 12. The bottom of the material hopper 7 has a "V"-shaped structure, and a downward-sloping guide chute 25 is located at the bottom of the "V"-shaped structure. In actual use, belt conveyors are placed below the guide chute 25 and below the screen to transport the screened quartz stones outward.

[0040] Based on the above embodiments, this application further improves the first support frame 8 to facilitate its movement and positioning. Specifically, a wheel axle 26 is provided at the bottom of one end of the first support frame 8, and two wheels 10 are rotatably mounted at both ends of the wheel axle 26. Next, a vertically downward support shaft 23 is rotatably mounted inside the other end of the first support frame 8. The support shaft 23 extends below the first support frame 8 and its bottom is connected to the wheel bracket 2. Steering wheels 3 are rotatably mounted at both ends of the wheel bracket 2. It should be noted that the steering wheels 3 do not contact the bottom of the first support frame 8 when turning.

[0041] A traction frame 1 is rotatably installed in the middle of the wheel bracket 2. The traction frame 1 can be connected to the tractor, allowing the tractor to pull the sand screening device to move. Since the steering wheel 3 can rotate around the support shaft 23, the steering wheel 3 can adjust its direction at any time during the process of the tractor pulling the sand screening device.

[0042] When the sand screening device reaches the preset location, because the first support frame 8 is provided with supports 4 on both sides of the end away from the walking wheel 10, the top of the support 4 is vertically provided with a support hydraulic cylinder 5, and the bottom of the support hydraulic cylinder 5 is provided with a support plate, the support hydraulic cylinder 5 can be controlled to extend and support the ground to fix the sand screening device as a whole.

[0043] Based on the above embodiments, further optimization is possible. The surface of the support ring 16 is provided with an annular groove, and the support wheel 17 is placed within the annular groove. It should be noted that the support wheel 17 is located in the center of the annular groove, and there is a gap between the support wheel 17 and both sides of the annular groove to prevent the support wheel 17 from contacting the groove and causing wear. Because during the screening process, sand continuously falls from the screen, the annular groove prevents sand from falling onto the surface of the support wheel 17.

[0044] Based on the above embodiments, it should be further explained that the angle between the central axis of the screen and the plane is 3-45°. When the lifting hydraulic cylinder 6 is retracted to its shortest position, the second support frame 9 is placed on top of the first support frame 8, and the tilt angle of the screen is 3° at this time. Of course, the tilt angle of the screen can be larger, as long as the extension of the lifting hydraulic cylinder 6 is controlled.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 sand screening device for wet-mixed mortar production, comprising a first support frame (8), a second support frame (9) being provided on the top of the first support frame (8) and the two being rotatably connected at one end, characterized in that, A lifting hydraulic cylinder (6) is inclined between the first support frame (8) and the second support frame (9). The two ends of the lifting hydraulic cylinder (6) are rotatably connected to the connecting frame (24). The two connecting frames (24) are respectively installed in the first support frame (8) and the second support frame (9). Under the drive of the lifting hydraulic cylinder (6), the second support frame (9) rotates around the first support frame (8). The top of the second support frame (9) is provided with a drum screening device, which changes its tilt angle as the first support frame (8) rotates. At the end of the first support frame (8) away from the second support frame (9), there is a feeding device that feeds material into the drum screening device.

2. The sand screening device for wet-mixed mortar production as described in claim 1, characterized in that, The bottom of one end of the first support frame (8) is provided with a wheel axle (26), and the two ends of the wheel axle (26) are provided with a traveling wheel (10). A vertically downward support shaft (23) is rotatably mounted at the other end of the first support frame (8). The support shaft (23) extends below the first support frame (8) and its bottom is connected to the wheel bracket (2). Steering wheels (3) are rotatably mounted at both ends of the wheel bracket (2). A traction frame (1) is rotatably mounted in the middle of the wheel bracket (2).

3. The sand screening device for wet-mixed mortar production as described in claim 2, characterized in that, The first support frame (8) has supports (4) on both sides of the end away from the walking wheel (10). The top of the support (4) is vertically provided with a support hydraulic cylinder (5), and the bottom of the support hydraulic cylinder (5) is provided with a support plate.

4. The sand screening device for wet-mixed mortar production as described in any one of claims 1-3, characterized in that, The drum screening device includes a support frame (12) located above the second support frame (9), and the two sides of the support frame (12) are connected to the second support frame (9) by a plurality of first brackets (11); At least two drive wheels (13) are symmetrically provided at the top of each end of the support frame (12). The drive wheels (13) are rotatably installed in the third seat body, which is connected to the top of the support frame (12). The drum screening device also includes support cylinders (14) located above the two ends of the support frame (12). The two support cylinders (14) are coaxially arranged and connected by a cylindrical screen. The two support cylinders (14) are placed on the drive wheels (13) respectively. The drive wheels (13) are symmetrically distributed on both sides of the support cylinders (14). The support cylinders (14) can roll freely on the drive wheels (13). A drive device is provided below one end of the support frame (12). The drive device is connected to the drive shaft (27) through a chain drive mechanism. The drive shaft (27) is connected to one end of the drive wheel (13).

5. The sand screening device for wet-mixed mortar production as described in claim 4, characterized in that, The cylindrical screen includes a support ring (16) coaxially arranged between two support cylinders (14) and there is at least one support ring (16). The two support cylinders (14) are connected by multiple rods parallel to their axes. The support ring (16) is connected to the rods, and a screen is provided on the surface of the rods.

6. The sand screening device for wet-mixed mortar production as described in claim 5, characterized in that, Support wheels (17) are provided on both sides of the support ring (16). The support wheels (17) are rotatably installed in the first seat body. The first seat body is set on the top of the bearing frame (12). The drive wheel (13) located on one side of the bearing frame (12) and the support wheel (17) are connected by a transmission shaft (18).

7. The sand screening device for wet-mixed mortar production as described in claim 6, characterized in that, Each support cylinder (14) has an annular flange (15) coaxially provided at the end near the feeding device. The side of the annular flange (15) away from the feeding device is in contact with the limiting wheel (19). The axis of the limiting wheel (19) is perpendicular to the support cylinder (14), while the axis of the drive wheel (13) is parallel to the support cylinder (14). The limiting wheel (19) is rotatably installed in the second seat body, which is located on the top of the bearing frame (12).

8. The sand screening device for wet-mixed mortar production as described in claim 7, characterized in that, The feeding device includes a feeding hopper (21) located above the top of the end of the first support frame (8) away from the second support frame (9). The height of the feeding hopper (21) is higher than the height of the drum screening device. The two sides of the feeding hopper (21) are connected to the first support frame (8) through multiple second brackets (22). A feeding channel (20) is provided at the bottom of the feeding hopper (21) and is inclined downward and placed in the support cylinder (14). There is a certain distance between the feeding channel (20) and the inner wall of the support cylinder (14) to prevent the support cylinder (14) from touching the feeding channel (20) when it rotates with the second support frame (9).

9. The sand screening device for wet-mixed mortar production as described in claim 6, characterized in that, The surface of the support ring (16) is provided with an annular groove, and the support wheel (17) is placed in the annular groove.

10. The sand screening device for wet-mixed mortar production as described in claim 4, characterized in that, Below the support frame (12) is a material hopper (7), the bottom of the material hopper (7) is a "V" shaped structure, and a downward inclined guide chute (25) is provided at the bottom of the "V" shaped structure.

Images