Gravel aggregate screening device

Abstract

The invention relates to the technical field of concrete screening equipment, and particularly discloses a gravel aggregate screening device which comprises a rack, a screen and a vibration structure used for driving the screen are installed on the rack, and a discharging plate is arranged below the screen; a lead screw is arranged above the screen, one end of the lead screw is connected with a driving motor, the lead screw is in threaded connection with a movable frame, and the movable frame is connected with a limiting structure used for limiting rotation of the movable frame and enabling the movable frame to only move horizontally. The movable frame is provided with a cleaning structure which is aligned with the surface of the screen. The device further comprises a controller, and the controller is electrically connected to the driving motor. The screen cloth is cleaned through the brush while screening is conducted, aggregate is prevented from being clamped in the screen holes, and the problem that in the background technology, the efficiency of manually dredging the screen cloth is low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete screening equipment, and in particular to a sand and gravel aggregate screening device. Background Art

[0002] With the acceleration of urbanization and the booming construction industry, the amount of waste concrete is increasing. Aggregate refers to the granular material that plays a role in the skeleton and filling of concrete and mortar. There are two types of aggregate: fine aggregate and coarse aggregate. Recycled concrete aggregate refers to the aggregate formed by crushing, grading and mixing waste concrete blocks in proportion.

[0003] Recycling waste concrete can not only solve the problem of waste concrete treatment, but also meet the demand for aggregates in construction projects. It has good economic and environmental performance and has broad application prospects in various construction and infrastructure projects, such as roads, bridges, tunnels, and water conservancy projects. In the processing of recycled concrete aggregates, screening and grading are key links, and the screening effect directly affects the quality of recycled aggregates and the performance of subsequent engineering applications.

[0004] The screening device for processing sand and gravel aggregates including recycled concrete aggregates mainly consists of a screen frame and a vibration mechanism that drives the screen frame to vibrate. The screen frame is provided with screen holes, and the crushed aggregates enter the screen frame. The vibration mechanism drives the screen frame to vibrate, causing the aggregates to roll and jump on the screen plate, and the aggregates of different particle sizes are separated according to the size of the screen holes.

[0005] The current screening device has the following problem: some aggregates with larger particle sizes are easily stuck in the sieve holes and cause blockage when passing through the sieve frame. At this time, the sieve frame needs to be manually unblocked, which not only consumes a lot of manpower, but also prolongs the screening time and reduces production efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a sand and gravel aggregate screening device, which can clean the screen with a brush during screening to prevent aggregates from being stuck in the screen holes, thereby solving the problem of low efficiency of manual dredging of the screen in the background technology.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A sand and gravel aggregate screening device comprises a frame, a screen and a vibration structure for driving the screen are installed on the frame, a feed plate is arranged below the screen; a screw rod is arranged above the screen, one end of the screw rod is connected to a driving motor, and the screw rod is threadedly connected to a movable frame; the movable frame is connected to a limiting structure for limiting the rotation of the movable frame so that the movable frame can only move horizontally; the movable frame is provided with a cleaning structure, and the cleaning structure is aligned with the surface of the screen; and a controller is also included, and the controller is electrically connected to the driving motor.

[0008] Furthermore, the cleaning structure is a brush.

[0009] Furthermore, the limiting structure is another screw rod, the two screw rods are respectively arranged on both sides of the screen, and the two ends of the movable frame are respectively threadedly connected to the two screw rods; it also includes two tracks, the two tracks are respectively arranged on both sides of the screen, the two screw rods are respectively placed in the two tracks, and the drive motor is fixedly installed on the tracks.

[0010] Furthermore, the vibration structure includes a rotating motor, a driving wheel is installed at the output end of the rotating motor, the driving wheel is connected to a driven wheel through a belt, and the driven wheel is installed on the frame; a rotating rod is fixedly provided on the axis of the driven wheel, the rotating rod is fixedly connected to a crank, a connecting rod is hinged at the outer end of the crank, and the end of the connecting rod away from the crank is hinged in the connecting seat of the screen; a sliding structure is provided at the bottom of the screen, the sliding structure is used to limit the screen so that the screen can only move horizontally; the rotating rod, the crank and the connecting rod form a crank-connecting rod mechanism, so that the rotation of the driven wheel drives the screen to complete reciprocating horizontal movement.

[0011] Furthermore, the sliding structure includes a plurality of rollers, the rollers abut against the bottom of the screen, the axes of the rollers are connected to the frame, and the plurality of rollers are in the same horizontal plane, ensuring that the screen can be supported while enabling the screen to move horizontally.

[0012] Furthermore, bearings are respectively installed at both ends of the driven wheel axis, and the bearings are fixedly connected to the frame.

[0013] Furthermore, a pressure sensor is installed on the axis of the roller, and the pressure sensor is electrically connected to the controller.

[0014] Furthermore, a cylinder is fixedly installed at both ends of the movable frame, the cylinder is electrically connected to the controller, the cylinder is vertically arranged, a groove block is installed at the output end of the cylinder, and the groove block is provided with a first through hole; protrusions are installed at both ends of the top of the brush, and the protrusions are provided with a second through hole; the protrusions are clamped with the groove blocks, and after the clamping, the first through hole and the second through hole are connected by bolts; the cylinder is electrically connected to the controller.

[0015] Furthermore, a baffle is fixedly installed on the track, and the baffle is provided with a plurality of fixing holes. The baffle is installed on the frame by bolts passing through the fixing holes, and the baffle surrounds both sides of the screen.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The brush is aligned with the surface of the screen, and the translation of the movable frame enables the brush to move on the plane of the screen, which can continuously clean the screen surface. The bristles of the brush can bring out the materials stuck in the screen holes, effectively remove the residual aggregates in the screen holes, prevent the screen holes from being blocked, and do not need to be manually dredged, which reduces labor costs and improves screening efficiency.

[0017] 2. A pressure sensor is installed on the axis of the roller. Multiple rollers support the screen together. After the data of the pressure sensor of each roller are integrated, the overall weight of the screen is obtained. Since the weight of the screen itself is relatively light, once a lot of sand and gravel accumulate and clog the screen holes, the data of the pressure sensor will change significantly. The data of the pressure sensor is transmitted to the controller. The controller judges based on the data. If the weight is large, the brush is controlled to clean the screen. If the weight is close to the original weight of the screen, no cleaning is performed. The present invention automatically judges the blockage situation and completes the cleaning of the screen, saving manpower.

[0018] 3. The brush and the rotating motor can be started at the same time, so that the reciprocating translation movement of the screen and the cleaning work of the brush can be carried out at the same time, achieving the technical effect of rubbing the brush. Such a compound movement has a better effect of cleaning the sand and gravel in the screen hole. And the cylinder is used to make the brush fit the screen more closely to complete the strong cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the present invention.

[0020] Figure 2 This is a partially disassembled structural diagram from another perspective of the present invention.

[0021] Figure 3 It is the structural diagram of the vibration structure and the screen.

[0022] Figure 4 This is the disassembled structure diagram of the screw rod and movable frame.

[0023] Figure 5 This is the disassembled structure diagram of the movable frame.

[0024] The meanings of the numbers in the figure are: 1-frame, 2-screen, 3-rotating motor, 4-driving wheel, 5-driven wheel, 6-belt, 7-bearing, 8-rotating rod, 9-crank, 10-connecting rod, 11-hinge seat, 12-unloading plate, 13-track, 14-screw, 15-driving motor, 16-bump, 17-groove block, 18-movable frame, 19-brush, 20-cylinder, 21-baffle, 22-roller, 23-pressure sensor, 24-controller. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical scheme and the technical effects brought about.

[0026] like Figure 1 , Figure 2 As shown, a sand and gravel aggregate screening device includes a frame 1, on which a screen 2 and a vibration structure for driving the screen 2 are installed, and a feed plate 12 is arranged below the screen 2; a screw rod 14 is arranged above the screen 2, one end of the screw rod 14 is connected to a driving motor 15, the screw rod 14 is threadedly connected to a movable frame 18, and the movable frame 18 is connected to a limiting structure for limiting the rotation of the movable frame 18 so that the movable frame 18 can only move horizontally; the movable frame 18 is provided with a cleaning structure, and the cleaning structure is aligned with the surface of the screen 2; and also includes a controller 24, which is electrically connected to the driving motor 15.

[0027] The present invention is provided with a track 13, a screw rod 14 and a driving motor 15 above the screen 2. The driving motor 15 is controlled by a controller 24. When the driving motor 15 rotates, the screw rod 14 is driven to rotate. The screw rod 14 is threadedly connected to a movable frame 18. When the movable frame 18 is connected with a limiting structure that limits the rotation of the movable frame 18 so that the movable frame 18 can only translate, the rotation of the screw rod 14 can drive the movable frame 18 to complete the translation. The movable frame 18 is provided with a cleaning structure, which is aligned with the surface of the screen 2. The translation of the movable frame 18 enables the cleaning structure to move in the plane of the screen 2, and the screen surface can be continuously cleaned to prevent the screen hole from being blocked. There is no need to manually clear it, which reduces the labor cost and improves the screening efficiency. The controller 24 starts and shuts down the driving motor 15.

[0028] Furthermore, the cleaning structure is a brush 19, and the bristles of the brush 19 can remove the material stuck in the sieve hole, and can effectively remove the aggregate residue in the sieve hole. In order to solve the problem that the material stuck in the sieve hole is tightly connected, the brush 19 is selected to have a larger hardness. When the brush 19 cleans the sieve hole, it can effectively squeeze the sieve hole, and squeeze the tightly connected material in the sieve hole downward or to the side, so that it is no longer stuck, and it is convenient for it to fall again during the subsequent screening process of the screen 2. The structure of the brush is as follows Figure 5 As shown, multiple groups of brushes are arranged in parallel. Even if the previous group of brushes does not clean properly, there are subsequent brushes to assist in cleaning, thereby achieving a better cleaning effect.

[0029] like Figure 4As shown, further, the limiting structure is another screw rod 14, two screw rods 14 are respectively arranged on both sides of the screen 2, and the two ends of the movable frame 18 are respectively threadedly connected with the two screw rods 14; it also includes two tracks 13, the two tracks 13 are respectively arranged on both sides of the screen 2, the two screw rods 14 are respectively placed in the two tracks 13, and the driving motor 15 is fixedly mounted on the tracks 13. Another screw rod 14 is arranged so that both ends of the movable frame 18 are driven, which can not only enable the movable frame 18 to obtain sufficient power, but also make the movable frame 18 move more stably.

[0030] Furthermore, the sliding structure includes a plurality of rollers 22, the rollers 22 abut against the bottom of the screen 2, the axis of the rollers 22 is connected to the frame 1, and the plurality of rollers 22 are in the same horizontal plane, ensuring that the screen 2 can be supported and horizontally moved. The rollers 22, as a sliding structure, complete the translation of the screen 2 in a rolling motion, and the friction between the screen 2 and the rollers 22 is small, so that the screen 2 has little wear during frequent reciprocating motion, and the motion is stable and not easily affected.

[0031] like Figure 3 As shown, further, the vibration structure includes a rotating motor 3, the output end of the rotating motor 3 is equipped with a driving wheel 4, the driving wheel 4 is connected to a driven wheel 5 through a belt 6, and the driven wheel 5 is installed on the frame 1; the axis of the driven wheel 5 is fixedly provided with a rotating rod 8, the rotating rod 8 is fixedly connected to a crank 9, the outer end of the crank 9 is hinged with a connecting rod 10, and the end of the connecting rod 10 away from the crank 9 is hinged in the connecting seat of the screen 2; the bottom of the screen 2 is provided with a sliding structure, the sliding structure is used to limit the screen 2 so that the screen 2 can only move horizontally; the rotating rod 8, the crank 9 and the connecting rod 10 form a crank 9 connecting rod 10 mechanism, so that the rotation of the driven wheel 5 drives the screen 2 to complete reciprocating horizontal movement. The drive of the screen 2 of the present invention is started by the rotating motor 3, the rotation of the rotating motor 3 drives the rotation of the driving wheel 4, and the driving wheel 4 drives the driven wheel 5 to rotate through the belt 6. The rotating rod 8, crank 9 and connecting rod 10 connected to the driven wheel 5 form a crank 9 connecting rod 10 mechanism. When the driven wheel 5 rotates, the crank 9 follows the driven wheel 5 to rotate circumferentially, thereby driving the connecting rod 10 to rotate at one end hinged to the crank 9. The other end of the connecting rod 10 is hinged to the connecting seat of the screen 2. In addition, the screen 2 is restricted by the sliding structure and can only move horizontally. Therefore, the screen 2 will move reciprocatingly horizontally to complete the screening of the aggregate in the screen 2.

[0032] Further, bearings 7 are respectively installed at both ends of the axis of the driven wheel 5, and the bearings 7 are fixedly connected to the frame 1. The bearings 7 are arranged at both ends of the driven wheel 5 to ensure the stability of the rotation of the driven wheel 5.

[0033] Furthermore, a pressure sensor 23 is installed on the axis of the roller 22, and the pressure sensor 23 is electrically connected to the controller 24. The controller 24 is used to start and shut down the drive motor 15, that is, the controller 24 is used to control the brush 19 to clean the screen 2. The brush 19 cleans the screen 2 usually after the present invention has completed a period of sand and gravel aggregate screening work. At this time, there will be a problem of sand and gravel blocking the screen holes, so the brush 19 is used to clean it. Since the screening process of sand and gravel aggregate is not fixed, it can be continuous screening of sand and gravel, or intermittent screening of sand and gravel for multiple times, but whether the screen 2 needs to be cleaned and whether it needs to be cleaned after each screening needs to be judged manually. A pressure sensor 23 is installed on the axis of the roller 22. Multiple rollers 22 support the screen 2 together. After the data of the pressure sensor 23 of each roller 22 are integrated, the overall weight of the screen 2 is obtained. Since the weight of the screen 2 itself is relatively light, once a large amount of sand and gravel accumulates and blocks the screen hole, the data of the pressure sensor 23 will change significantly. The data of the pressure sensor 23 is transmitted to the controller 24. The controller 24 judges based on the data that the weight is relatively large, and controls the brush 19 to clean the screen 2. The weight is close to the original weight of the screen 2, and no cleaning is performed, thereby achieving the automatic judgment of the blockage situation of the present invention, completing the cleaning of the screen 2, and saving manpower. The controller 24 in the present invention is a conventional controller 24 in the prior art, as long as it can receive the data of the pressure sensor 23, judge the data to start or not start the work.

[0034] like Figure 5As shown, further, a cylinder 20 is fixedly installed at both ends of the movable frame 18, and the cylinder 20 is electrically connected to the controller 24. The cylinder 20 is vertically arranged, and a groove block 17 is installed at the output end of the cylinder 20, and the groove block 17 is provided with a first perforation; the top ends of the brush 19 are respectively installed with a protrusion 16, and the protrusion 16 is provided with a second perforation; the protrusion 16 is engaged with the groove block 17, and the first perforation and the second perforation are connected by bolts after the engagement; the cylinder 20 is electrically connected to the controller 24. The protrusion 16 and the groove block 17 are connected by bolts after the engagement, forming a detachable connection mode, which is convenient for the replacement and cleaning of the brush 19. There are many situations in which the sieve holes in the screen 2 are blocked, sometimes loose, and sometimes tight. When the blockage is tight, the present invention can start the brush 19 and the rotating motor 3 at the same time, so that the reciprocating translation movement of the screen 2 and the cleaning work of the brush 19 are carried out simultaneously, so as to achieve the technical effect of rubbing the brush, and such a composite movement has a better effect of cleaning the sand and gravel in the sieve holes. In this complex movement, the vibration and error will become larger, and the role of the cylinder 20 is to make the brush 19 fit the screen 2 more closely to complete the strong cleaning. The controller 24 sets a multi-range judgment based on the data, and divides the cleaning situation into light cleaning and heavy cleaning. Light cleaning only starts the brush 19, and heavy cleaning starts the brush 19, the rotating motor 3 and the cylinder 20 at the same time, correspondingly handling the corresponding blockage situation and saving energy.

[0035] Further, the track 13 is fixedly mounted with a baffle 21, which is provided with a plurality of fixing holes, and the baffle 21 is mounted on the frame 1 by bolts passing through the fixing holes, and the baffle 21 surrounds both sides of the screen 2. The baffle 21 surrounds both sides of the screen 2 to prevent sand and gravel from popping out of the screen 2.

[0036] The terms “connection” and “fixation” mentioned in the description of the present invention may refer to fixed connection, processing and forming, welding or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0037] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inside", "outside", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand and gravel aggregate screening device, characterized in that: The machine comprises a frame (1), a screen (2) and a vibration structure for driving the screen (2) being installed on the frame (1), and a blanking plate (12) being arranged below the screen (2); A screw rod (14) is arranged above the screen (2), one end of the screw rod (14) is connected to a driving motor (15), and the screw rod (14) is threadedly connected to a movable frame (18); the movable frame (18) is connected to a limiting structure for limiting the rotation of the movable frame (18) so that the movable frame (18) can only move in translation; The movable frame (18) is provided with a cleaning structure, and the cleaning structure is aligned with the surface of the screen (2); It also includes a controller (24), which is electrically connected to the drive motor (15).

2. A sand and gravel aggregate screening device according to claim 1, characterized in that: The cleaning structure is a brush (19).

3. The sand and gravel aggregate screening device according to claim 1, characterized in that: The limiting structure is another screw rod (14), the two screw rods (14) are respectively arranged on both sides of the screen (2), and the two ends of the movable frame (18) are respectively threadedly connected to the two screw rods (14); It also includes two rails (13), the two rails (13) are respectively arranged on both sides of the screen (2), the two screw rods (14) are respectively placed in the two rails (13), and the driving motor (15) is fixedly mounted on the rails (13).

4. The sand and gravel aggregate screening device according to claim 1, characterized in that: The vibration structure comprises a rotating motor (3), the output end of the rotating motor (3) is equipped with a driving wheel (4), the driving wheel (4) is connected to a driven wheel (5) via a belt (6), and the driven wheel (5) is mounted on the frame (1); A rotating rod (8) is fixedly arranged on the axis of the driven wheel (5), the rotating rod (8) is fixedly connected to a crank (9), a connecting rod (10) is hingedly connected to the outer end of the crank (9), and an end of the connecting rod (10) away from the crank (9) is hingedly connected to a connecting seat of the screen (2); a sliding structure is arranged at the bottom of the screen (2), the sliding structure is used to limit the screen (2) so that the screen (2) can only move in translation; The rotating rod (8), the crank (9) and the connecting rod (10) form a crank (9) and connecting rod (10) mechanism, so that the rotation of the driven wheel (5) drives the screen (2) to complete reciprocating horizontal movement.

5. A sand and gravel aggregate screening device according to claim 4, characterized in that: The sliding structure comprises a plurality of rollers (22), the rollers (22) abutting against the bottom of the screen (2), the axes of the rollers (22) being connected to the frame (1), and the plurality of rollers (22) being located on the same horizontal plane, thereby ensuring that the screen (2) can be supported while enabling the screen (2) to move horizontally.

6. A sand and gravel aggregate screening device according to claim 4, characterized in that: Bearings (7) are respectively installed at both ends of the axis of the driven wheel (5), and the bearings (7) are fixedly connected to the frame (1).

7. The sand and gravel aggregate screening device according to claim 5, characterized in that: A pressure sensor (23) is mounted on the axis of the roller (22), and the pressure sensor (23) is electrically connected to a controller (24).

8. The sand and gravel aggregate screening device according to claim 2, characterized in that: A cylinder (20) is fixedly mounted at each end of the movable frame (18), the cylinder (20) is electrically connected to the controller (24), the cylinder (20) is vertically arranged, a groove block (17) is mounted at the output end of the cylinder (20), and the groove block (17) is provided with a first through hole; and convex blocks (16) are mounted at each end of the top of the brush (19), and the convex blocks (16) are provided with a second through hole; The convex block (16) and the concave block (17) are snap-fitted, and after the snap-fitting, the first through hole and the second through hole are connected via bolts; the cylinder (20) is electrically connected to the controller (24).

9. The sand and gravel aggregate screening device according to claim 3, characterized in that: The track (13) is fixedly mounted with a baffle (21), the baffle (21) being provided with a plurality of fixing holes, the baffle (21) being mounted on the frame (1) by means of bolts passing through the fixing holes, and the baffle (21) surrounding both sides of the screen (2).

Images