Sand and stone screening device for building construction
By introducing a screening drive and a rotary cleaning mechanism into the sand and gravel screening device for construction, the problems of sand and gravel splashing and large particle residue have been solved, achieving a more stable and efficient screening process and extending the service life of the screening screen.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 黄峰
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-23
AI Technical Summary
Existing sand and gravel screening devices used in construction are prone to sand and gravel splashing during the vibrating screening process, and large sand and gravel particles are easily left on the screening screen, affecting the screening quality and the life of the screen.
The screening drive mechanism is connected to the clasp by the first and second gears, and uses a motor to drive the moving frame to move the screening screen repeatedly, reducing sand and gravel splashing; the rotary cleaning mechanism quickly cleans up the large sand and gravel particles left behind by the lifting block and the rotating seat.
It effectively reduces sand and gravel splashing, improves the stability and practicality of screening, and extends the service life of the screening screen.
Smart Images
Figure CN224389308U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sand and gravel screening technology in construction, and in particular to a sand and gravel screening device for construction. Background Technology
[0002] Sand and gravel refer to a loose mixture of sand grains and gravel. Geologically, mineral or rock particles with a diameter of 0.074–2 mm are called sand, while those larger than 2 mm are called gravel or breccia (the difference lies in the degree of roundness; gravel refers to well-rounded rock particles, while breccia refers to poorly rounded rock particles). Based on their source, they can be divided into natural sand and gravel and manufactured sand and gravel. Natural sand and gravel are formed by natural processes (mainly rock weathering), while manufactured sand and gravel are produced through sand making machines and other auxiliary equipment. It is a common building material with wide applications in construction, road engineering, and other fields.
[0003] Prior art document (CN211275409U) discloses a sand and gravel screening device for construction, including a shell, a feed hopper fixedly connected to the middle of the top of the shell, a connecting plate fixedly connected to the bottom of the shell, a partition plate fixedly connected above the connecting plate, and a fixed baffle fixedly connected below the connecting plate. Vibration devices are fixedly connected to the middle of the front and rear sides of the shell, and a protective shell is provided on the outside of the vibration device.
[0004] This device uses a torsion spring, a screen, and a vibration device to continuously screen sand and gravel on a screen. When the sand and gravel on the screen reach a certain weight, the screen will tilt under the action of the torsion spring, causing the sand and gravel that has not passed the screening to slide off from both sides. This prevents the sand and gravel from accumulating on the screening device, ensuring the screening quality of the device and thus improving the screening efficiency of sand and gravel. This also improves the rationality and feasibility of the device. However, there is no structure around the screen to block the sand and gravel, which will cause large sand and gravel particles to fall onto the conveyor belt during the vibration of the vibration device, affecting the screening quality of sand and gravel.
[0005] Therefore, those skilled in the art have provided a sand and gravel screening device for construction to solve the problems mentioned in the background art. Utility Model Content
[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a sand and gravel screening device for construction. This device is simple to use, effectively reduces sand and gravel splashing caused by traditional vibrating screening, and can quickly clean up large sand and gravel particles left on the screening screen, thereby improving the service life of the screening screen and enhancing the stability and practicality of the device.
[0007] To achieve the above objectives, the present invention provides the following technical solution:
[0008] A sand and gravel screening device for construction includes a base, a movable frame, and a screening screen. The movable frame is slidably disposed on the upper end of the base, and the screening screen is rotatably disposed inside the movable frame. A screening drive mechanism is disposed at the lower end of the movable frame, and a rotating cleaning mechanism is disposed inside the movable frame.
[0009] The screening drive mechanism includes a first gear, a second gear, a locking tooth, a first motor, and a second motor. Multiple locking teeth are equidistantly fixed on one side of the lower end of the movable frame and located at both the front and rear ends. The first gear and the second gear are rotatably mounted on one side of the base and located at both the front and rear ends. The first motor and the second motor are fixedly mounted on one side of the base and located at both the front and rear ends. The output ends of the corresponding first motor and the second motor are fixedly connected to the corresponding first gear and the second gear. Limiting sliders are slidably mounted on both sides of the base. Baffles are fixedly mounted on both sides of the movable frame. The upper ends of the two limiting sliders are fixedly connected to the lower ends of the corresponding baffles.
[0010] Through the above technical solution, the screening drive mechanism can make the screening screen plate move repeatedly, reducing the sand and gravel splashing caused by traditional vibrating screening. The first gear and the second gear are connected to the meshing gear and are subjected to the relative rotation of the first motor and the second motor, so that the first gear and the second gear rotate in opposite directions, thereby making the moving frame move back and forth on the base repeatedly to realize the screening of sand and gravel by the screening screen plate. At the same time, the moving frame is more stable when moving on the base due to the action of the limiting slider. Then, the fine sand and gravel on the screening screen plate are filtered through the screening screen plate by the power and fall into the base, and are discharged from the screening outlet by the slope, thereby improving the screening stability of the device.
[0011] Furthermore, the rotating cleaning mechanism includes an outer frame, a rotating seat, and a carrying block. The outer frame is fixedly disposed on the outside of the screening screen plate, the rotating seat is fixedly disposed on the rear end of the outer frame and near its upper end, and the carrying block is fixedly disposed on the front end of the outer frame and near its upper end. The upper end of the movable frame and both the front and rear ends are provided with grooves, and the rotating seat and the carrying block are respectively placed inside the corresponding grooves.
[0012] The above technical solution allows for the rapid cleaning of large sand and gravel particles remaining on the screening screen after filtration via a rotating cleaning mechanism. This prevents a large amount of sand and gravel from overflowing from the screening screen during screening, thus avoiding the load and pressure on the screen and affecting its lifespan. By having the operator insert their fingers into the lifting slot and pull the lifting block upwards, the screening screen can rotate on the moving frame under the action of external force and the rotating seat. This facilitates the operator's rapid cleaning of large sand and gravel particles from the screening screen, thereby improving the practicality of the device.
[0013] Furthermore, a ramp is fixedly provided inside the base, and a screening outlet is opened at the front end and lower end of the base, and the screening outlet is interconnected with the ramp.
[0014] Through the above technical solution, the fine sand and gravel that fall into the base can be smoothly discharged by connecting the screening outlet and the slope.
[0015] Furthermore, support legs are fixedly installed at the four corners of the lower end of the base;
[0016] The above technical solution provides support legs at the four corners of the base, ensuring its stability.
[0017] Furthermore, the first gear and the second gear are respectively engaged with multiple locking teeth;
[0018] Through the above technical solution, by meshing the first gear and the second gear with multiple cleats respectively, the moving frame can be repeatedly moved by the relative rotation of the first motor and the second motor, thereby realizing the screening of sand and gravel by the screening screen.
[0019] Furthermore, a housing is fixedly installed on one side of the base and at the corresponding first motor and second motor;
[0020] The above technical solution involves fixing outer casings to both the first and second motors to protect them from damage by sand and gravel, thus ensuring the normal operation of the screening process.
[0021] Furthermore, the upper end of the base is provided with sliding grooves on both sides, and a sliding rod is fixedly installed inside the base and in the corresponding sliding groove. The two limiting sliders slide on the corresponding sliding rods respectively.
[0022] The above technical solution allows the limiting sliders to slide on the corresponding slide bars, making the mobile frame more stable when it moves repeatedly on the base.
[0023] Furthermore, the carrying block has a handle slot inside;
[0024] The above technical solution provides a handle groove inside the carrying block, which prevents the operator's hand from slipping between the carrying block and the screen plate when rotating it, thus facilitating the rotation of the screen plate.
[0025] This utility model has the following beneficial effects:
[0026] 1. This utility model proposes a sand and gravel screening device for construction. The device can repeatedly move the screening screen through a screening drive mechanism, reducing the sand and gravel splashing caused by traditional vibrating screening. The first gear and the second gear are connected to the meshing gear and are subjected to the relative rotation of the first motor and the second motor, so that the first gear and the second gear rotate in opposite directions, thereby causing the moving frame to move back and forth on the base repeatedly to screen the sand and gravel. At the same time, the moving frame is more stable when moving on the base due to the action of the limiting slider. Subsequently, the fine sand and gravel on the screening screen are filtered through the screening screen by the power and fall into the base, and are discharged from the screening outlet by the slope, thereby improving the screening stability of the device.
[0027] 2. This utility model proposes a sand and gravel screening device for construction. This device can quickly clean large sand and gravel particles left on the screening screen after filtration through a rotating cleaning mechanism, avoiding a large amount of sand and gravel overflowing from the screening screen during screening and preventing the screen from being subjected to heavy load and affecting its lifespan. By having the operator insert their fingers into the lifting slot and pull the lifting block upwards, the screening screen can be rotated on the moving frame under the action of external force and the rotating seat, thus facilitating the operator to quickly clean large sand and gravel particles from the screening screen, thereby improving the practicality of the device.
[0028] 3. The present invention proposes a sand and gravel screening device for construction. This device is simple to use and can effectively reduce the sand and gravel splashing caused by traditional vibrating screening. At the same time, it can quickly clean up large sand and gravel particles left on the screening screen, improve the service life of the screening screen, and thus improve the stability and practicality of the screening device. Attached Figure Description
[0029] Figure 1 This is a perspective view of a sand and gravel screening device for building construction proposed in this utility model.
[0030] Figure 2 Another perspective view of a sand and gravel screening device for construction proposed in this utility model;
[0031] Figure 3 This is a side sectional view of a sand and gravel screening device for building construction proposed in this utility model;
[0032] Figure 4 This is a schematic diagram of the base structure of a sand and gravel screening device for building construction proposed in this utility model;
[0033] Figure 5 This is a schematic diagram of the movable frame structure of a sand and gravel screening device for construction proposed in this utility model;
[0034] Figure 6This is a schematic diagram of the screening mesh structure of a sand and gravel screening device for building construction proposed in this utility model.
[0035] Legend:
[0036] 1. Base; 2. Movable frame; 3. Screening screen; 4. Screening outlet; 5. Support leg; 6. Screening drive mechanism; 601. First gear; 602. Second gear; 603. Gear; 604. First motor; 605. Second motor; 606. Outer shell; 607. Limiting slider; 608. Slide groove; 609. Slide rod; 610. Baffle plate; 7. Rotary cleaning mechanism; 701. Outer frame; 702. Rotating seat; 703. Hand-held block; 704. Hand-held groove; 705. Groove; 8. Slope. Detailed Implementation
[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0038] Reference Figure 1-5 The present invention provides a specific embodiment of a sand and gravel screening device for construction, comprising a base 1, a movable frame 2, and a screening screen 3. The movable frame 2 is slidably disposed on the upper end of the base 1, and the screening screen 3 is rotatably disposed inside the movable frame 2. A screening drive mechanism 6 is disposed at the lower end of the movable frame 2, and a rotating cleaning mechanism 7 is disposed inside the movable frame 2. An inclined slope 8 is fixedly disposed inside the base 1, and a screening outlet 4 is opened at the front end and lower end of the base 1. The screening outlet 4 is interconnected with the inclined slope 8. Through the interconnection between the screening outlet 4 and the inclined slope 8, fine sand and gravel falling into the base 1 can be smoothly discharged. Support legs 5 are fixedly disposed at the four corners of the lower end of the base 1. The support legs 5 fixedly disposed at the four corners of the lower end of the base 1 can support the base 1 to ensure the stability of the base 1.
[0039] The screening drive mechanism 6 includes a first gear 601, a second gear 602, a locking tooth 603, a first motor 604, and a second motor 605. Multiple locking teeth 603 are equidistantly fixed on one side of the lower end of the movable frame 2, located at both the front and rear ends. The first gear 601 and the second gear 602 are rotatably mounted inside the base 1 on one side, located at both the front and rear ends. The first motor 604 and the second motor 605 are fixedly mounted on one side of the base 1, located at both the front and rear ends. The output ends of the corresponding first motor 604 and second motor 605 are fixedly connected to the corresponding first gear 601 and second gear 602. The base 1 is located inside... Limiting sliders 607 are slidably installed on both sides, and baffles 610 are fixedly installed on both sides of the movable frame 2. The upper ends of the two limiting sliders 607 are fixedly connected to the lower ends of the corresponding baffles 610. The screening drive mechanism 6 can make the screening screen 3 move repeatedly, reducing the sand and gravel splashing caused by traditional vibrating screening. The first gear 601 and the second gear 602 are meshed with the clamping teeth 603 and are subjected to the relative rotation of the first motor 604 and the second motor 605, which can make the first gear 601 and the second gear 602 rotate in opposite directions, thereby making the movable frame 2 move back and forth on the base 1 repeatedly to realize the screening of sand and gravel by the screening screen 3. At that time, the movable frame 2 is more stable when moving on the base 1 due to the action of the limiting slider 607. Subsequently, the fine sand and gravel on the screening screen 3 are filtered through the screening screen 3 by the power and fall into the base 1, and are discharged from the screening outlet 4 by the action of the inclined slope 8, thereby improving the screening stability of the device. The first gear 601 and the second gear 602 are respectively meshed with multiple locking teeth 603. Through the meshing connection between the first gear 601 and the second gear 602 and the multiple locking teeth 603, the movable frame 2 can be repeatedly moved by the relative rotation of the first motor 604 and the second motor 605, thereby realizing the screening of sand and gravel by the screening screen 3. A housing 606 is fixedly installed on one side of the base 1 at the corresponding positions of the first motor 604 and the second motor 605. The housing 606 is fixedly installed at the first motor 604 and the second motor 605 to protect them from damage by sand and gravel, thus ensuring the normal operation of the screening. Slide grooves 608 are provided on both sides of the upper end of the base 1. Slide rods 609 are fixedly installed inside the base 1 at the corresponding slide grooves 608. Two limiting sliders 607 slide on the corresponding slide rods 609 respectively. The sliding of the limiting sliders 607 on the corresponding slide rods 609 makes the moving frame 2 more stable when it moves repeatedly on the base 1.
[0040] Reference Figure 1-3The rotary cleaning mechanism 7 includes an outer frame 701, a rotating seat 702, and a carrying block 703. The outer frame 701 is fixedly installed on the outside of the screening screen 3. The rotating seat 702 is fixedly installed at the rear end of the outer frame 701 and near its upper end. The carrying block 703 is fixedly installed at the front end of the outer frame 701 and near its upper end. The upper end of the movable frame 2 has grooves 705 at both the front and rear ends. The rotating seat 702 and the carrying block 703 are respectively placed inside the corresponding grooves 705. The rotary cleaning mechanism 7 can quickly clean large particles of sand and gravel left on the screening screen 3 after filtration, preventing a large amount of sand and gravel from overflowing from the screening screen 3 during screening. The screening screen 3 is subjected to heavy loads, which affects its lifespan. By having the operator insert their fingers into the handle groove 704 and pull the handle block 703 upwards, the screening screen 3 can rotate on the moving frame 2 under the action of external force and the rotating seat 702. This facilitates the operator to quickly clean large particles of sand and gravel from the screening screen 3, thereby improving the practicality of the device. The handle block 703 has a handle groove 704 inside, which prevents the operator's hand from slipping on the handle block 703 when rotating the screening screen 3, thus providing convenience for the rotation of the screening screen 3.
[0041] Working principle: When using this construction sand and gravel screening device, sand and gravel are first poured onto the screening screen plate 3. Then, the first motor 604 and the second motor 605 are started. The moving frame 2 is connected to the first gear 601 and the second gear 602 by meshing with the locking teeth 603. The first gear 601 and the second gear 602 are rotated by the first motor 604 and the second motor 605, causing them to move back and forth repeatedly on the base 1 to achieve screening of sand and gravel by the screening screen plate 3. At the same time, the moving frame 2 is more stable when moving on the base 1 due to the action of the limiting slider 607. Subsequently, the fine sand and gravel on the screening screen plate 3 are filtered through the screening screen plate 3 by the power and fall into the base. Inside the seat 1, and under the action of the inclined plane 8, the sand and gravel are discharged from the screening outlet 4. After a certain amount of sand and gravel has been screened, the first motor 604 and the second motor 605 are turned off, bringing the moving frame 2 to a stop. Then, the operator inserts their fingers into the handle trough 704 and pulls the lifting block 703 upwards. This causes the screening screen 3 to rotate on the moving frame 2 under the action of external force and the rotating seat 702. This facilitates the operator to quickly clean large particles of sand and gravel from the screening screen 3, preventing a large amount of sand and gravel from overflowing from the screening screen 3 during screening and avoiding the heavy load on the screening screen 3, which would affect its lifespan. This improves the stability and practicality of the screening device. The first motor 604 and the second motor 605 mentioned above are both stepper motors, rotating in relative directions and having the same pulse signal to achieve synchronous operation of multiple motors.
[0042] 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 specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific 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 construction, comprising a base (1), a movable frame (2), and a screening mesh (3), characterized in that: The movable frame (2) is slidably disposed on the upper end of the base (1), the screening screen (3) is rotatably disposed inside the movable frame (2), the lower end of the movable frame (2) is provided with a screening drive mechanism (6), and the interior of the movable frame (2) is provided with a rotating cleaning mechanism (7). The screening drive mechanism (6) includes a first gear (601), a second gear (602), a locking tooth (603), a first motor (604), and a second motor (605). There are multiple locking teeth (603), which are equidistantly fixed on one side of the lower end of the movable frame (2) and located at the front and rear ends. The first gear (601) and the second gear (602) are respectively rotatably disposed on one side of the base (1) and located at the front and rear ends. The first motor (604) and the second motor (605) are respectively fixedly disposed on one side of the base (1) and located at the front and rear ends. The output ends of the corresponding first motor (604) and the second motor (605) are respectively fixedly connected to the corresponding first gear (601) and the second gear (602). Limiting sliders (607) are slidably disposed on both sides of the interior of the base (1). Baffles (610) are fixedly disposed on both sides of the movable frame (2). The upper ends of the two limiting sliders (607) are fixedly connected to the lower ends of the corresponding baffles (610).
2. The sand and gravel screening device for construction according to claim 1, characterized in that: The rotating cleaning mechanism (7) includes an outer frame (701), a rotating seat (702), and a carrying block (703). The outer frame (701) is fixedly installed on the outside of the screening screen (3). The rotating seat (702) is fixedly installed at the rear end of the outer frame (701) and near its upper end. The carrying block (703) is fixedly installed at the front end of the outer frame (701) and near its upper end. The upper end of the moving frame (2) is provided with grooves (705) at both the front and rear ends. The rotating seat (702) and the carrying block (703) are respectively placed inside the corresponding grooves (705).
3. The sand and gravel screening device for construction according to claim 1, characterized in that: The base (1) has a ramp (8) fixedly installed inside. The base (1) has a screening outlet (4) at its front end and lower end. The screening outlet (4) is interconnected with the ramp (8).
4. The sand and gravel screening device for construction according to claim 1, characterized in that: Support legs (5) are fixedly installed at the four corners of the lower end of the base (1).
5. The sand and gravel screening device for construction according to claim 1, characterized in that: The first gear (601) and the second gear (602) are respectively engaged with a plurality of locking teeth (603).
6. The sand and gravel screening device for construction according to claim 1, characterized in that: The base (1) is fixedly provided with a housing (606) on one side and at the corresponding first motor (604) and second motor (605).
7. The sand and gravel screening device for construction according to claim 1, characterized in that: The base (1) has sliding grooves (608) on both sides of its upper end. Slide rods (609) are fixedly installed inside the base (1) and in the corresponding sliding grooves (608). The two limiting sliders (607) slide on the corresponding slide rods (609).
8. A sand and gravel screening device for construction according to claim 2, characterized in that: The carrying block (703) has a carrying slot (704) inside.