Gravel screening device for building construction
By using intermittent feeding and magnetic separator adsorption for metals, the problems of poor feeding control and insufficient impurity removal capacity in existing sand and gravel screening devices have been solved, thereby improving screening efficiency and the purity of finished sand and gravel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-10
AI Technical Summary
Existing sand and gravel screening devices suffer from poor material control, resulting in excessive screen load and reduced screening efficiency. They also lack effective impurity removal capabilities, especially in the treatment of metallic impurities, which affects the purity of the finished sand and gravel and the quality of the project.
The design employs intermittent feeding control and magnetic separator adsorption of metals. The feeding speed of sand and gravel is controlled by baffles and scraper assemblies, and combined with magnetic separator adsorption of metal impurities, the screening efficiency and purity of sand and gravel are ensured.
This method enables intermittent feeding of sand and gravel, prevents screen overload, improves screening efficiency, effectively removes metal impurities, and enhances the purity and screening effect of the finished sand and gravel.
Smart Images
Figure CN223980777U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction, and in particular to a sand and gravel screening device for building construction. Background Technology
[0002] Construction refers to the production activities during the implementation phase of an engineering project, encompassing numerous stages. It begins with site leveling and foundation construction, laying a solid foundation for skyscrapers. The process requires meticulous processing of various building materials, such as sand and gravel, using sand and gravel screening devices to ensure material quality. Workers utilize their professional skills to operate machinery and, according to design blueprints, systematically assemble steel bars, cement, and other materials, brick by brick, to build houses, bridges, and other structures, gradually realizing the magnificent transformation of architecture from planning to reality.
[0003] However, current sand and gravel screening devices have the following shortcomings: Poor material control: Ordinary sand and gravel screening devices lack an effective intermittent material feeding mechanism, which can easily lead to excessive material feeding at one time. This causes a sudden increase in the load on the screen, which not only affects screening efficiency but may also damage the screen, shorten its service life, and increase equipment maintenance costs and downtime. Insufficient impurity removal capacity: Most devices do not fully consider the problem of metal impurities in sand and gravel and lack the function of adsorbing metals. This results in limited purity of the finished sand and gravel, which may affect the quality of construction projects and create safety hazards when used in construction.
[0004] In response to this technical problem, this application proposes a sand and gravel screening device for construction. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as excessive material feeding affecting screening efficiency and difficulty in filtering metals mixed in sand and gravel. The proposed invention provides a sand and gravel screening device for construction, which aims to allow intermittent material feeding to prevent excessive material feeding at one time from causing excessive screen load and affecting screening efficiency, and to adsorb metals mixed in sand and gravel, thereby improving the screening effect.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A sand and gravel screening device for construction includes a box body. A screen is fixedly connected inside the box body. A feeding component is installed inside the box body to control the feeding speed of sand and gravel. Discharge chutes are opened on both the left and right sides of the box body. A scraping component is installed inside the box body to scrape the sand and gravel filtered by the screen. A discharge chute is fixedly connected to the bottom side of the box body. A shell is installed on the bottom side of the discharge chute. A magnetic separator for absorbing metal mixed in the sand and gravel is rotatably connected inside the shell. An inlet is opened on the top side of the shell. An outlet is opened on the bottom side of the shell. Four legs are fixedly connected to the bottom side of the discharge chute. A blocking component is installed between the four legs to ensure that the time for sand and gravel to exit the discharge chute and enter the inlet is the same.
[0008] Furthermore, the feeding assembly includes two slides formed on the top of the box body. A first limiting rod is fixedly connected inside the front slide, and a first reciprocating screw is rotatably connected inside the rear slide. The first reciprocating screw and the first limiting rod are connected by a baffle plate.
[0009] Furthermore, the front side of the baffle is slidably connected to the outer wall of the first limiting rod, and the rear side of the baffle is threadedly connected to the outer wall of the first reciprocating screw. Both the front and rear sides of the baffle are slidably connected inside the slide groove. A first motor is installed on the left side of the housing, and the drive end of the first motor is fixedly connected to the left end of the first reciprocating screw.
[0010] Furthermore, the scraping assembly includes a groove formed inside the housing, a second limiting rod is fixedly connected inside the front groove, and a second reciprocating screw is rotatably connected inside the rear groove. The second limiting rod and the second reciprocating screw are connected by a scraper.
[0011] Furthermore, the front side of the scraper is slidably connected to the outer wall of the second limiting rod, and the rear side of the scraper is threadedly connected to the outer wall of the second reciprocating screw. Both the front and rear sides of the scraper are slidably connected inside the groove. The left ends of the first and second reciprocating screws are fixedly connected to pulleys, and the two pulleys are connected to each other through the inner side of the belt.
[0012] Furthermore, the shielding assembly includes a metal rod fixedly connected between the left and right legs, the two metal rods being connected by a metal plate, and the metal plate being slidably connected to the outer wall of the metal rod.
[0013] Furthermore, the left-side support leg and the metal plate are connected by a spring, the bottom side of the metal plate is fixedly connected with teeth, the rear side of the magnetic separator is fixedly connected with a rotating rod, and the outer wall of the rotating rod is fixedly connected with a missing gear, which meshes with the teeth.
[0014] Furthermore, a second motor is provided on the rear side of the outer casing, the drive end of the second motor is fixedly connected to the rear end of the rotating rod, a collection box is provided on the bottom side of the outer casing, and a protective plate is fixedly connected to the outer wall of the outer casing.
[0015] Furthermore, a material collection trough is fixedly connected to both the left and right sides of the box, and a material collection box is provided inside the material collection trough. An inlet trough is fixedly connected to the top side of the box.
[0016] This utility model has the following beneficial effects:
[0017] 1. In this utility model, the first reciprocating screw drives the baffle plate to move left and right inside the box, so that the baffle plate blocks the bottom of the feed chute, thereby preventing sand and gravel from entering the box from the feed chute, so that the sand and gravel enter the box intermittently, preventing excessive material from being fed at one time, which would cause the screen to be overloaded and affect the screening efficiency.
[0018] 2. In this utility model, the baffle plate moves left and right below the discharge chute by means of a missing gear and a spring, so that the timing of the discharge of sand and gravel from the discharge chute and its entry into the magnetic separator is consistent, thereby the magnetic separator adsorbs the metal mixed in the sand and gravel, improving the screening effect of the sand and gravel. Attached Figure Description
[0019] Figure 1 This is a perspective view of a sand and gravel screening device for building construction proposed in this utility model.
[0020] Figure 2 This is a rear view of a sand and gravel screening device for building construction proposed in this utility model;
[0021] Figure 3 This is a schematic diagram of the internal structure of a sand and gravel screening device for building construction proposed in this utility model.
[0022] Figure 4 This is a schematic diagram of the screen structure of a sand and gravel screening device for building construction proposed in this utility model;
[0023] Figure 5 This is a schematic diagram of the outer shell structure of a sand and gravel screening device for building construction proposed in this utility model.
[0024] Figure 6 This is a schematic diagram of the magnetic separator structure of a sand and gravel screening device for building construction proposed in this utility model.
[0025] Legend:
[0026] 1. Feed chute; 2. Box body; 3. Collection chute; 4. Metal rod; 5. Spring; 6. Outer shell; 7. Collection box; 8. Support leg; 9. Metal plate; 10. Discharge chute; 11. Collection box; 12. Pulley; 13. First motor; 14. Second motor; 15. Magnetic separator; 16. Second limit rod; 17. Second reciprocating screw; 18. Scraper; 19. First limit rod; 20. Baffle plate; 21. Screen; 22. First reciprocating screw; 23. Rotating rod; 24. Gear missing; 25. Protective plate. Detailed Implementation
[0027] 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.
[0028] Reference Figures 1-3 This utility model provides an embodiment of a sand and gravel screening device for construction, comprising a housing 2, with a screen 21 fixedly connected inside the housing 2. The screen 21 is used to screen the sand and gravel, filtering out sand and gravel that meet the size requirements, while intercepting sand and gravel that do not meet the requirements. The screen 21 is made of stainless steel, which has high strength and can withstand large screening pressure, ensuring the stability and service life of the screen 21. Discharge chutes are provided on both the left and right sides of the housing 2, and a discharge chute 10 is fixedly connected to the bottom of the housing 2, through which the filtered sand and gravel are discharged from the housing 2. A housing 6 is provided on the bottom side of the discharge chute 10. A magnetic separator 15 for adsorbing metal mixed in sand and gravel is rotatably connected inside the housing 6. The magnetic separator 15 contains an electromagnet. When energized, the electromagnet becomes magnetic, thus adsorbing the metal mixed in the sand and gravel. When de-energized, it loses its magnetism, releasing the adsorbed metal. A feed inlet is provided on the top side of the housing 6, and a discharge outlet is provided on the bottom side. Sand and gravel enter the magnetic separator 15 through the feed inlet and are discharged from the magnetic separator 15 through the discharge outlet. Metal can also be discharged through the discharge outlet. Four support legs 8 are fixedly connected to the bottom side of the discharge chute 10. (Refer to...) Figure 3 and Figure 4The top of the housing 2 has two sliding grooves. A first limiting rod 19 is fixedly connected inside the front sliding groove, and a first reciprocating screw 22 is rotatably connected inside the rear sliding groove. The first reciprocating screw 22 and the first limiting rod 19 are connected by a baffle plate 20. The front side of the baffle plate 20 is slidably connected to the outer wall of the first limiting rod 19, and the rear side of the baffle plate 20 is threadedly connected to the outer wall of the first reciprocating screw 22. Both the front and rear sides of the baffle plate 20 are slidably connected inside the sliding grooves. A reciprocating screw 22 drives a baffle plate 20 to move left and right inside the housing 2, blocking the bottom of the feed chute 1 and preventing sand and gravel from entering the housing 2. This allows sand and gravel to enter the housing 2 intermittently, preventing excessive material intake at one time from overloading the screen 21 and affecting screening efficiency. A first motor 13 is installed on the left side of the housing 2, and the drive end of the first motor 13 is fixedly connected to the left end of the first reciprocating screw 22. The first motor 13 drives the... The first reciprocating screw 22 is rotated. A groove is provided inside the housing 2. A second limiting rod 16 is fixedly connected inside the front groove, and a second reciprocating screw 17 is rotatably connected inside the rear groove. The second limiting rod 16 and the second reciprocating screw 17 are connected by a scraper 18. The front side of the scraper 18 is slidably connected to the outer wall of the second limiting rod 16, and the rear side of the scraper 18 is threadedly connected to the outer wall of the second reciprocating screw 17. Both the front and rear sides of the scraper 18 are slidably connected inside the groove. The scraper 18 is driven to move left and right inside the housing 2 by the second reciprocating screw 17, so that the scraper 18 scrapes the sand and gravel filtered from the screen 21 to the discharge chute. The left ends of the first reciprocating screw 22 and the second reciprocating screw 17 are fixedly connected to pulleys 12. The two pulleys 12 are connected by the inner side of a belt. The two pulleys 12 connected by the belt cause the second reciprocating screw 17 to rotate simultaneously when the first reciprocating screw 22 rotates.
[0029] Reference Figure 5 and Figure 6A metal rod 4 is fixedly connected between the two left and right support legs 8. The two metal rods 4 are connected by a metal plate 9, which is slidably connected to the outer wall of the metal rod 4. The left support leg 8 and the metal plate 9 are connected by a spring 5. A tooth is fixedly connected to the bottom side of the metal plate 9. A rotating rod 23 is fixedly connected to the rear side of the magnetic separator 15. A missing gear 24 is fixedly connected to the outer wall of the rotating rod 23. The missing gear 24 and the tooth mesh with each other. The missing gear 24 drives the metal plate 9 to slide to the right, so that the metal plate 9 moves away from under the discharge chute 10, allowing the sand and gravel to fall from the discharge chute 10 into the feed inlet. The spring 5 pulls the metal plate 9 back under the discharge chute 10, so that the metal plate 9... The discharge chute 10 is covered. A second motor 14 is installed on the rear side of the outer casing 6. The drive end of the second motor 14 is fixedly connected to the rear end of the rotating rod 23. The second motor 14 drives the rotating rod 23 to rotate, thereby causing the magnetic separator 15 and the gear 24 to rotate. A collection box 7 is installed on the bottom side of the outer casing 6. A protective plate 25 is fixedly connected to the outer wall of the outer casing 6. A collection chute 3 is fixedly connected to both the left and right sides of the box body 2. A collection box 11 is installed inside the collection chute 3. An inlet chute 1 is fixedly connected to the top side of the box body 2. The copper drum collection box 7 collects the sand and gravel after the metal is adsorbed. The collection box 11 collects the sand and gravel that is intercepted by the screen 21. The inlet chute 1 adds the sand and gravel into the box body 2.
[0030] Working principle: First, sand and gravel are poured into the feed trough 1. Then, the first motor 13 and the second motor 14 are started. The first motor 13 drives the first reciprocating screw 22 to rotate, causing the first reciprocating screw 22 to drive the baffle plate 20 to move left and right inside the housing 2. When the baffle plate 20 moves to the bottom of the feed trough 1, it will close the feed trough 1, thus preventing sand and gravel from falling into the housing 2. When the baffle plate 20 moves to the left or right side inside the housing 2, it will open the feed trough 1, allowing the sand and gravel to fall into the housing 2. The sand and gravel can fall into the box 2, thus allowing for intermittent feeding. The sand and gravel falling into the box 2 will fall onto the screen 21. At this time, under the action of the two pulleys 12 connected by belts, the first reciprocating screw 22 will drive the second reciprocating screw 17 to rotate, thereby driving the scraper 18 to move left and right inside the box 2, so that the scraper 18 will spread the sand and gravel falling on the screen 21, allowing the screen 21 to filter the sand and gravel, while sand and gravel smaller than the filter holes of the screen 21 will continue to fall.
[0031] Sand and gravel larger than the filter mesh size of screen 21 will be scraped by scraper 18 to the discharge chute, and then fall into the collection box 11. Continuing to fall, the sand and gravel will enter the discharge chute 10. At this time, the second motor 14 drives the rotating rod 23 to rotate, which in turn causes the magnetic separator 15 and the toothed gear 24 to rotate. When the toothed gear 24 rotates to the top, it will mesh with the toothed metal plate 9, causing the metal plate 9 to move to the right, opening the discharge chute 10. Simultaneously, the notch on the magnetic separator 15 will rotate to a position coinciding with the feed inlet, allowing the sand and gravel to enter the magnetic separator 15 through the feed inlet. Afterwards, the magnetic separator 15 and the toothed gear 24 continue to rotate, causing the notch on the magnetic separator 15 to rotate into the interior of the outer casing 6. This seals the feed inlet. During this process, the missing gear 24 will rotate downwards, thus no longer meshing with the metal plate 9. At this time, the spring 5 will pull the metal plate 9 to the left, causing the metal plate 9 to return to the bottom of the discharge chute 10, thereby sealing the discharge chute 10 and preventing sand and gravel from falling out. At the same time, the magnetic separator 15 will attract the metal mixed in the sand and gravel. When the notch of the magnetic separator 15 rotates to coincide with the discharge port, the sand and gravel will be discharged through the discharge port into the collection box 7 and collected. When it is necessary to collect the metal in the magnetic separator 15, the power supply to the electromagnet inside the magnetic separator 15 can be cut off, causing the electromagnet to lose its magnetism and release the metal, so that the metal can also be discharged from the discharge port like the sand and gravel.
[0032] 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 and gravel screening device for use in construction, characterized by: The utility model provides a sandstone screening device, including box (2), the inside fixed connection of box (2) has screen cloth (21), the inside of box (2) is provided with the down feeder assembly, and the down feeder assembly is used to control the down feeder speed of sandstone, the left and right sides of box (2) are all opened with the discharge chute, the inside of box (2) is provided with the scraping assembly, and the scraping assembly is used to scrape the sandstone of screen cloth (21) filtering, the bottom side fixed connection of box (2) has the discharge chute (10), the bottom side of discharge chute (10) is provided with the shell (6), the inside rotation connection of shell (6) has the magnetic separation cylinder (15) for sucking the mixed metal in sandstone, the top side of shell (6) is opened with the feed inlet, the bottom side of shell (6) is opened with the discharge port, the bottom side fixed connection of discharge chute (10) has four support legs (8), and the shielding assembly is arranged between four support legs (8), and the time of sandstone discharging discharge chute (10) and entering feed inlet is consistent through the shielding assembly.
2. A sand and gravel screening device for construction work according to claim 1, characterized in that: The down feeder assembly includes two chutes opened in the top of the box (2), a first limiting rod (19) is fixedly connected inside the front chute, and a first reciprocating screw rod (22) is rotatably connected inside the rear chute.
3. A sand and gravel screening device for use in construction according to claim 2, characterized in that: The front side of the shielding plate (20) is slidingly connected to the outer wall of the first limiting rod (19), the rear side of the shielding plate (20) is threadedly connected to the outer wall of the first reciprocating screw rod (22), and the front side and the rear side of the shielding plate (20) are slidingly connected inside the chute.
4. A sand and gravel screening device for construction work as claimed in claim 2, wherein: The scraping assembly includes a groove opened in the inside of the box (2), a second limiting rod (16) is fixedly connected inside the front groove, and a second reciprocating screw rod (17) is rotatably connected inside the rear groove.
5. A sand and gravel screening device for use in construction according to claim 4, characterized in that: The front side of the scraper (18) is slidingly connected to the outer wall of the second limiting rod (16), the rear side of the scraper (18) is threadedly connected to the outer wall of the second reciprocating screw rod (17), and the front side and the rear side of the scraper (18) are slidingly connected inside the groove.
6. A sand and gravel screening device for construction work as claimed in claim 1, wherein: The left ends of the first reciprocating screw rod (22) and the second reciprocating screw rod (17) are fixedly connected with a belt pulley (12), and the two belt pulleys (12) are connected by a belt inside. The shielding assembly includes a metal rod (4) fixedly connected between the left and right two support legs (8), and a metal plate (9) is connected between the two metal rods (4).
7. A sand and gravel screening device for use in construction according to claim 6, characterized in that: The left side of the supporting leg (8) and the metal plate (9) are connected through a spring (5), the bottom side of the metal plate (9) is fixedly connected with a tooth, the rear side of the magnetic separation cylinder (15) is fixedly connected with a rotating rod (23), the outer wall of the rotating rod (23) is fixedly connected with a toothless gear (24), and the toothless gear (24) and the tooth are in meshing engagement.
8. A sand and gravel screening device for use in construction according to claim 7, characterized in that: The rear side of the shell (6) is provided with a second motor (14), the driving end of the second motor (14) is fixedly connected to the rear end of the rotating rod (23), the bottom side of the shell (6) is provided with a collecting box (7), and the outer wall of the shell (6) is fixedly connected with a protective plate (25).
9. A sand and gravel screening device for use in construction according to claim 1, characterized in that: The left and right sides of the box body (2) are fixedly connected with material collecting grooves (3), the inside of the material collecting groove (3) is provided with a material collecting box (11), and the top side of the box body (2) is fixedly connected with a feeding groove (1).