A sand screening device for construction engineering

Abstract

The utility model relates to sand screening technical field discloses a kind of construction engineering sand screening devices, including machine body, the outside of machine body is equipped with inlet, the front side of machine body is equipped with motor, the drive end of motor is fixedly connected with first transmission shaft by buffer component, the outside of first transmission shaft is fixedly connected with eccentric block, the outside end of first transmission shaft is fixedly connected with second transmission shaft, the outside of second transmission shaft is fixedly connected with second fixed part, the outside end of second fixed part is fixedly connected with sieve cylinder, the both ends of second transmission shaft are fixedly connected with fixed plate, the outside of fixed plate is fixedly connected with inclined block. In the utility model, motor drives sieve cylinder rotation and spring repeatedly releases pressure, so that device is combined by repeatedly moving up and down and centrifugal force, shortens sand material conveying path and reduces dust, straight-through design prevents blockage, repeatedly moving up and down and rotary motion accelerate sand group breaking, improve screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sand screening technology, and in particular to a sand screening device for construction engineering. Background Technology

[0002] In construction engineering fields such as road paving, concrete preparation, and masonry construction, sand screening is a crucial step in ensuring project quality. Traditional manual sand screening relies on workers repeatedly shaking hand-held sieves, which is not only inefficient and labor-intensive but also prone to dust pollution, making it difficult to meet the continuous supply needs of large-scale projects.

[0003] Although mechanized sand screening equipment has appeared on the market, its inherent defects still restrict engineering efficiency. The persistent problem of clogging is that static screens are prone to clogging in wet sand or sand containing impurities, requiring frequent shutdowns for cleaning. The simple up-and-down repetitive motion mode is not effective in breaking up sand particles, resulting in fine sand remaining in the coarse material, reducing gradation accuracy, insufficient stability, lack of dynamic sealing, and sand particles often splashing at the junction of the rotating screen cylinder and the feed inlet, causing raw material waste and on-site pollution. In response to this technical problem, this application proposes a sand screening device for construction engineering. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a sand screening device for construction engineering. It accelerates the breaking down of sand clumps by combining up-and-down repeated movement with centrifugal force, shortens the path to reduce dust and prevent blockage, and the inclined blocks and slotted discs improve the stone discharge effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sand screening device for construction engineering includes a machine body, an inlet port passing through the outer side of the machine body, a motor passing through the front side of the machine body, a first drive shaft fixedly connected to the drive end of the motor via a buffer assembly, an eccentric block fixedly connected to the outer side of the first drive shaft, a second drive shaft fixedly connected to the outer end of the first drive shaft, a second fixing member fixedly connected to the outer side of the second drive shaft, a screen cylinder fixedly connected to the outer end of each of the second fixing members, a fixing plate fixedly connected to both ends of the second drive shaft, and an inclined block fixedly connected to the outer side of each fixing plate.

[0007] Furthermore, the buffer assembly includes a slider fixedly connected to the rear side of the motor, both ends of the first transmission shaft are rotatably connected to the inner side of the slider, a slide rod is slidably connected to the outer side of the slider, and buffer bases are fixedly connected to the front and rear sides of the machine body, with both ends of the slide rod fixedly connected to the inner side of the buffer base.

[0008] Furthermore, a spring is provided on the outer side of the slide rod, the inner end of the spring is fixedly connected to the outer side of the slider, and the outer end of the spring is fixedly connected to the inner side of the buffer base.

[0009] Furthermore, a first fixing member is fixedly connected to the inner side of the machine body, and a ring is fixedly connected to the inner end of the first fixing member. The lower end of the feed inlet passes through the outer side of the ring, and the inner side of the ring is rotatably connected to the outer side of the screen cylinder.

[0010] Furthermore, a sand-blocking net is fixedly connected to the outer side of the first drive shaft, and the outer side of the sand-blocking net is tightly attached to the inner side of the machine body.

[0011] Furthermore, a third fixing member is fixedly connected to the inner side of the machine body, and a slotted plate is fixedly connected to the inner end of the third fixing member. A stone discharge groove is opened on the outer side of the slotted plate.

[0012] Furthermore, a guide plate is fixedly connected to the inner side of the lower end of the machine body, and a sieve hole is provided on the outer side of the guide plate.

[0013] Furthermore, the lower side of the machine body is provided with a slot for discharging material, and the width of the slot is the same as the width of the guide plate.

[0014] This utility model has the following beneficial effects:

[0015] In this invention, the motor drives the screen cylinder to rotate and the spring repeatedly releases pressure, so that the device shortens the sand conveying path and reduces dust by combining the up-and-down movement with centrifugal force. The straight-through design prevents clogging, and the up-and-down movement and rotation speed up the breaking down of sand clumps and improves screening efficiency.

[0016] In this invention, the inclined block and the slotted disc work together to overcome the limitations of gravity-driven slag discharge and improve the stone discharge effect. The guide plate performs secondary screening to intercept coarse sand, and the slotted design facilitates the separate collection of fine sand and stones, thereby improving screening quality and collection convenience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the body of a sand screening device for construction engineering proposed in this utility model;

[0018] Figure 2 This is a cross-sectional screening diagram of a sand screening device for construction engineering proposed in this utility model;

[0019] Figure 3 This is an internal view of the sieve cylinder of a sand screening device for construction engineering proposed in this utility model;

[0020] Figure 4 This is a structural diagram of the up-and-down repetitive motion of a sand screening device for construction engineering proposed in this utility model.

[0021] Legend:

[0022] 1. Machine body; 2. Feed inlet; 3. Buffer base; 4. Motor; 5. First drive shaft; 6. Screen cylinder; 7. First fixing component; 8. Guide plate; 9. Sand baffle; 10. Second fixing component; 11. Ring; 12. Third fixing component; 13. Grooved plate; 14. Slide rod; 15. Slider; 16. Spring; 17. Second drive shaft; 18. Eccentric block; 19. Fixing plate; 20. Inclined block. Detailed Implementation

[0023] 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.

[0024] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a sand screening device for construction engineering, comprising a body 1, an inlet 2 passing through the outer side of the body 1, a motor 4 passing through the front side of the body 1, a slider 15 fixedly connected to the rear side of the motor 4, a first transmission shaft 5 fixedly connected to the drive end of the motor 4, a sand-blocking net 9 fixedly connected to the outer side of the first transmission shaft 5, the outer side of the sand-blocking net 9 closely attached to the inner side of the body 1, both ends of the first transmission shaft 5 rotatably connected to the inner side of the slider 15, a sliding rod 14 slidably connected to the outer side of the slider 15, buffer bases 3 fixedly connected to both the front and rear sides of the body 1, both ends of the sliding rod 14 fixedly connected to the inner side of the buffer base 3, and the sliding rod... A spring 16 is provided on the outside of the 14. The inner end of the spring 16 is fixedly connected to the outside of the slider 15. The outer end of the spring 16 is fixedly connected to the inner side of the buffer base 3. An eccentric block 18 is fixedly connected to the outside of the first drive shaft 5. A second drive shaft 17 is fixedly connected to the outer end of the first drive shaft 5. A second fixing member 10 is fixedly connected to the outside of the second drive shaft 17. A screen cylinder 6 is fixedly connected to the outer end of the second fixing member 10. A first fixing member 7 is fixedly connected to the inner side of the machine body 1. A ring 11 is fixedly connected to the inner end of the first fixing member 7. The lower end of the feed port 2 passes through the outer side of the ring 11. The inner side of the ring 11 is rotatably connected to the outer side of the screen cylinder 6.

[0025] First, the motor 4 is turned on, which drives the first drive shaft 5 to rotate. The first drive shaft 5 drives the eccentric block 18 to swing, and the screen cylinder 6 connected to the second drive shaft 17 also starts to rotate, generating centrifugal force. This causes the slider 15 to slide outside the slide rod 14. The slide rod 14 is located at the left end of the first drive shaft 5 and does not affect the first drive shaft 5. The spring 16 is compressed, and the spring 16 repeatedly releases pressure, producing a repetitive up-and-down motion effect, causing the screen cylinder 6 to rotate and move up and down repeatedly. Workers input the sand to be screened through the feed inlet 2, shortening the sand conveying path, reducing dust, and the straight-through design avoids blockage. The sand enters the ring 11 from the feed inlet 2 and is subjected to the repetitive up-and-down motion, as well as centrifugal force and gravity, moving to both sides. The combination of rotation and repetitive up-and-down motion increases the speed of breaking up sand clumps.

[0026] Reference Figures 2-4 Both ends of the second drive shaft 17 are fixedly connected to fixed plates 19, and inclined blocks 20 are fixedly connected to the outer side of the fixed plates 19. The inner side of the machine body 1 is fixedly connected to a third fixing member 12, and the inner end of the third fixing member 12 is fixedly connected to a slotted plate 13. A stone discharge trough is opened on the outer side of the slotted plate 13. The lower inner side of the machine body 1 is fixedly connected to a guide plate 8, and a screen hole is passed through the outer side of the guide plate 8. The secondary screen hole intercepts a small amount of coarse sand leaking from the screen cylinder 6. The lower side of the machine body 1 is provided with a slot for material discharge, and the width of the slot is the same as the width of the guide plate 8.

[0027] The sand is then screened out of the screen cylinder 6 and reaches the guide plate 8 for secondary screening. Small stones and larger stones in the sand are left in the screen cylinder 6. Because the screen cylinder 6 is concave in the middle and convex on both sides, it generates gravity and centrifugal force generated by rotation, and moves continuously to both sides, close to the slotted plate 13. The opposite sides of the slotted plate 13 are slidably connected to the two sides of the screen cylinder (6) and are swept up by the inclined block 20. The inclined angle design of the inclined block 20 makes it scoop up the stones attached to the wall when it rotates. It uses centrifugal force to guide the flow, breaking through the limitation of the traditional screen that repeatedly moves up and down and relies solely on gravity to discharge slag. It drives the small stones to be screened out from the slots of the slotted plate 13 and to the upper side of the guide plate 8. Because the guide plate 8 has an inclined angle, the small stones are discharged in the middle of the machine body 1. When collecting, only the fine sand screened on both sides needs to be collected. If small stones are needed, they can be collected in sections.

[0028] Working principle: First, motor 4 is turned on, which drives the first drive shaft 5 to rotate. The first drive shaft 5 drives the eccentric block 18 to swing, and the screen cylinder 6 connected to the second drive shaft 17 also starts to rotate, generating centrifugal force, which drives the slider 15 to slide and compress the spring 16. The spring 16 repeatedly releases pressure, producing a repetitive up-and-down motion effect, causing the screen cylinder 6 to rotate and move up and down repeatedly. The worker inputs the sand to be screened through the feed inlet 2. The sand enters the ring 11 through the feed inlet 2 and is subjected to the repetitive up-and-down motion, as well as centrifugal force and gravity, moving to both sides. Clumps of sand are also moved up and down repeatedly. The sand disperses and is sieved out of the screen cylinder 6, reaching the guide plate 8 for secondary screening. Small stones and larger particles in the sand remain in the screen cylinder 6. Due to gravity and centrifugal force, they move to both sides, close to the slotted plate 13, and are swept up by the inclined block 20. Using centrifugal force, the small stones are sieved out from the slots of the slotted plate 13 and onto the upper side of the guide plate 8. Because the guide plate 8 has an inclined angle and is equipped with screen holes, the secondary screening intercepts a small amount of coarse sand that leaks out, allowing the small stones to be discharged in the middle of the machine body 1. During collection, only the fine sand sieved on both sides needs to be collected. If small stones are needed, they can be collected in sections.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A sand screening device for construction engineering, characterized in that, The machine includes a body (1), with an inlet (2) passing through the outer side of the body (1), and a motor (4) passing through the front side of the body (1). The drive end of the motor (4) is fixedly connected to a first transmission shaft (5) through a buffer assembly. An eccentric block (18) is fixedly connected to the outer side of the first transmission shaft (5). A second transmission shaft (17) is fixedly connected to the outer end of the first transmission shaft (5). A second fixing member (10) is fixedly connected to the outer side of the second transmission shaft (17). A screen cylinder (6) is fixedly connected to the outer end of the second fixing member (10). A fixing plate (19) is fixedly connected to both ends of the second transmission shaft (17). An inclined block (20) is fixedly connected to the outer side of the fixing plate (19).

2. The sand screening device for construction engineering according to claim 1, characterized in that: The buffer assembly includes a slider (15) fixedly connected to the rear side of the motor (4), both ends of the first transmission shaft (5) are rotatably connected to the inner side of the slider (15), a slide rod (14) is slidably connected to the outer side of the slider (15), and buffer bases (3) are fixedly connected to the front and rear sides of the body (1), with both ends of the slide rod (14) fixedly connected to the inner side of the buffer base (3).

3. A sand screening device for construction engineering according to claim 2, characterized in that: A spring (16) is provided on the outside of the slide bar (14). The inner end of the spring (16) is fixedly connected to the outside of the slider (15), and the outer end of the spring (16) is fixedly connected to the inside of the buffer base (3).

4. A sand screening device for construction engineering according to claim 1, characterized in that: The inner side of the machine body (1) is fixedly connected to a first fixing member (7), and the inner end of the first fixing member (7) is fixedly connected to a ring (11). The lower end of the feed inlet (2) passes through the outer side of the ring (11), and the inner side of the ring (11) is rotatably connected to the outer side of the screen cylinder (6).

5. A sand screening device for construction engineering according to claim 4, characterized in that: A sand-blocking net (9) is fixedly connected to the outer side of the first drive shaft (5), and the outer side of the sand-blocking net (9) is closely attached to the inner side of the machine body (1).

6. A sand screening device for construction engineering according to claim 1, characterized in that: The inner side of the body (1) is fixedly connected to a third fixing member (12), and the inner end of the third fixing member (12) is fixedly connected to a slotted plate (13). The outer side of the slotted plate (13) is provided with a stone discharge groove.

7. A sand screening device for construction engineering according to claim 1, characterized in that: A guide plate (8) is fixedly connected to the inner side of the lower end of the machine body (1), and a sieve hole is provided on the outer side of the guide plate (8).

8. A sand screening device for construction engineering according to claim 1, characterized in that: The lower side of the machine body (1) is provided with a slot for discharging material, and the width of the slot is the same as the width of the guide plate (8).

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