Recycled aggregate multi-stage screening device

Abstract

The utility model discloses a recycled aggregate multistage screening device, which belongs to the field of recycled aggregate processing, and comprises a box body, the top of the box body is fixedly connected with a feeding hopper, screens are connected between the inner walls of the box body, the screens are obliquely arranged, a knocking mechanism is arranged below each screen, and each knocking mechanism comprises two groups of transverse plates which are symmetrically arranged front and back; a sliding groove is formed in the inner wall of the box body, the transverse plate is slidably connected into the sliding groove, a plurality of knocking rods are fixedly connected to the top of the transverse plate, a first spring is connected between the transverse plate and the sliding groove, and a dustproof mechanism is arranged in the feeding hopper. The device has the beneficial effects that the knocking mechanism is arranged, the screen is knocked from bottom to top through a knocking rod, upward force is provided for aggregate clamped in screen holes, and the situation that the screen is blocked, and the screening effect is affected is avoided; the closer to the feeding hopper, the more dense the knocking rods are distributed, so that the situation that more aggregate is accumulated on the screen close to the feeding hopper, and the knocking effect is reduced is avoided; front and rear groups of knocking rods are arranged, so that the knocking effect is ensured.

Description

Technical Field

[0001] The utility model relates to the field of recycled aggregate processing, in particular to a recycled aggregate multi-stage screening device. Background Art

[0002] Recycled aggregate is a material made by crushing and screening construction waste, such as waste concrete and bricks. It is a substitute for traditional aggregate and its production helps reduce environmental pollution and waste of resources. This type of aggregate usually has a rough surface, angular shape, and a large specific surface area, so it absorbs a lot of water. Recycled aggregate is widely used in the construction industry. It can be used to prepare ordinary concrete or mortar, and can also be used as raw material for the production of non-fired blocks or non-fired bricks. Compared with natural aggregate, recycled aggregate has the advantages of sustainability, environmental protection, and high economic benefits.

[0003] A Chinese patent with announcement number CN219442446U discloses a multi-stage screening device for recycled building aggregates. The patent realizes the left and right sliding of the screen by driving a movable frame to slide inside a screening box, which is beneficial for the rolling of aggregates on the screen and can accelerate the screening of aggregates. In addition, the sliding of the screen further causes the rotating drum to roll on it, and the screen is flushed by the brush on the rotating drum, thereby preventing the screen from being blocked by aggregates and improving the screening efficiency of the screen.

[0004] However, the brush will begin to deform when it contacts the brush screen, so the brush may completely press the aggregate into the sieve holes, causing the sieve holes to be blocked. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-stage screening device for recycled aggregate in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A multi-stage screening device for recycled aggregates comprises a box body, a feed funnel is fixedly connected to the top of the box body, a plurality of screens are connected between the inner walls of the box body, the diameters of the screen holes of the plurality of screens gradually decrease from top to bottom, the screens are arranged obliquely, a knocking mechanism is arranged under each screen, the knocking mechanism comprises two groups of transverse plates arranged symmetrically front and back, a slide groove is opened on the inner wall of the box body, the transverse plates are slidably connected in the slide groove, a plurality of knocking rods are fixedly connected to the top of the transverse plates, a first spring is connected between the transverse plates and the bottom wall of the slide groove, a connecting frame is fixedly connected between the front and rear groups of transverse plates, the knocking mechanism also comprises a power assembly, the power assembly is used to drive the connecting frame to move up and down, and a dustproof mechanism is arranged in the feed funnel.

[0008] Preferably, the power assembly includes a plurality of rotating shafts rotatably connected between the inner walls of the box body, a cam is fixedly connected to the rotating shaft, the cam is located above the connecting frame, a rotating motor is fixedly connected to one side of the box body, the output end of the rotating motor is connected to one of the rotating shafts through a coupling, and a synchronous belt is connected between two adjacent rotating shafts.

[0009] Preferably, a plurality of evenly distributed connecting frames are fixedly connected between two corresponding front and rear transverse plates, and a cam is arranged above each connecting frame.

[0010] Preferably, the distance between two adjacent knocking rods decreases as the distance from the feed funnel decreases.

[0011] Preferably, the dust-proof mechanism comprises two baffles hinged to the inner wall of the feed hopper, and a second spring is connected between the bottom of the baffle and the inner wall of the feed hopper.

[0012] Preferably, a plurality of first discharge pipes are fixedly connected to one side of the box body, and the first discharge pipes are located at the lower end of the screen; a second discharge pipe is fixedly connected to one side of the box body, and the second discharge pipes are located below the first discharge pipes.

[0013] The utility model is provided with a knocking mechanism, which knocks the screen from bottom to top through a knocking rod, thereby providing an upward force to aggregates stuck in the screen holes, thereby avoiding clogging of the screen and affecting the screening effect; the closer to the feed hopper, the denser the distribution of the knocking rods, thereby avoiding accumulation of a large amount of aggregates on the screen near the feed funnel and reducing the knocking effect; two groups of front and rear knocking rods are provided to ensure the knocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a multi-stage screening device for recycled aggregates according to the utility model;

[0015] Figure 2 It is a front view of a multi-stage screening device for recycled aggregates according to the utility model;

[0016] Figure 3 It is a front view of the internal structure of a multi-stage screening device for recycled aggregates according to the utility model;

[0017] Figure 4 It is a left view of a multi-stage screening device for recycled aggregates according to the utility model;

[0018] Figure 5 It is a right view of the internal structure of a multi-stage screening device for recycled aggregates described in the utility model. DETAILED DESCRIPTION

[0019] The utility model will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 5As shown, a multi-stage screening device for recycled aggregates comprises a box body 1, a feeding funnel 101 is welded on the top of the box body 1, a plurality of screens 2 are connected between the inner walls of the box body 1, the diameter of the screen holes of the screens 2 gradually decreases from top to bottom, the screens 2 are inclined, a plurality of first discharge pipes 102 are fixedly connected to one side of the box body 1, the first discharge pipes 102 are located at the lower end of the screens 2, a second discharge pipe 103 is fixedly connected to one side of the box body 1, the inner bottom wall of the box body 1 is inclined for easy material discharge, the second discharge pipe 103 is located at the lower end of the inner bottom wall of the box body 1, and a plurality of through holes are opened in the box body 1 for connecting the first discharge pipe 102 and the second discharge pipe 103 with the box body 1.

[0021] A knocking mechanism is provided under each screen 2, and the knocking mechanism includes two groups of horizontal plates 301 symmetrically arranged front and back, and a slide groove is provided on the inner wall of the box body 1. The horizontal plate 301 is slidably connected in the slide groove, and a plurality of knocking rods 302 are fixedly connected to the top of the horizontal plate 301. The distance between the top ends of the plurality of knocking rods 302 and the bottom end of the screen 2 is consistent, and the spacing between two adjacent knocking rods 302 decreases with the decrease of the distance from the feed funnel 101, so as to avoid the accumulation of more aggregates on the screen 2 near the feed funnel 101. Using fewer knocking rods 302 will affect the knocking effect, and a first spring 303 is connected between the horizontal plate 301 and the bottom wall of the slide groove, and a U-shaped connecting frame 304 is bolted between the front and rear groups of horizontal plates 301. The knocking mechanism also includes a power component, which is used to drive the connecting frame 304 to move up and down.

[0022] The power assembly includes a plurality of rotating shafts 306 rotatably connected between the inner walls of the box body 1, and a cam 307 is fixedly connected to the rotating shaft 306, and the cam 307 is located above the connecting frame 304. A rotating motor 305 is bolted to one side of the box body 1, and the output end of the rotating motor 305 is connected to one of the rotating shafts 306 through a coupling. A synchronous belt 308 is connected between two adjacent rotating shafts 306, and transmission between multiple rotating shafts 306 is achieved through the synchronous belt 308, thereby avoiding the use of additional power and improving resource utilization. A plurality of evenly distributed connecting frames 304 are fixedly connected between the two corresponding front and rear horizontal plates 301, and a cam 307 is arranged above each connecting frame 304 to improve the knocking effect.

[0023] A dustproof mechanism 4 is provided in the feed funnel 101, and the dustproof mechanism 4 includes two baffles 401 hinged on the inner wall of the feed funnel 101, and a second spring 402 is connected between the bottom of the baffle 401 and the inner wall of the feed funnel 101. When pouring the recycled aggregate, the baffle 401 opens under the action of pressure. When not pouring, the baffle 401 is reset under the action of the elastic force of the second spring 402 to prevent dust from being scattered from the feed funnel 101 during screening.

[0024] When the utility model is used, the recycled aggregate is poured into the box body 1 through the feeding funnel 101, and the baffle 401 is opened under the gravity of the recycled aggregate. After pouring, the baffle 401 is reset under the elastic force of the second spring 402 to prevent dust from being scattered from the feeding funnel 101 during screening. The recycled aggregate is screened through the screen 2, and those larger than the diameter of the screen hole are filtered onto the screen 2 and discharged through the first discharge pipe 102, and those smaller than the diameter of the screen hole pass through the screen 2 and continue to be screened. While screening, the rotating motor 305 is started, and the rotating motor 305 drives the rotating shaft 306 to drive the cam The wheel 307 rotates, and the transmission between the multiple rotating shafts 306 is realized through the synchronous belt 308. When the tip of the cam 307 contacts the connecting frame 304, it will drive the connecting frame 304 to move downward, and the connecting frame 304 drives the cross plate 301 and the knocking rod 302 to move downward. The first spring 303 accumulates force. When the tip of the cam 307 turns away, the cross plate 301 moves upward rapidly under the action of the elastic force of the first spring 303, and the cross plate 301 drives the knocking rod 302 to move upward, knocking the screen 2, providing an upward force to the aggregate stuck in the screen hole, avoiding the blockage of the screen 2 and affecting the screening effect.

Claims

1. A recycled aggregate multi-stage screening device, comprising a box (1), a feeding funnel (101) being fixedly connected to the top of the box (1), a plurality of screens (2) being connected between the inner walls of the box (1), the diameters of the screen holes of the plurality of screens (2) gradually decreasing from top to bottom, the screens (2) being arranged at an angle, and characterized in that: A knocking mechanism is provided below each of the screens (2), the knocking mechanism comprising two groups of transverse plates (301) symmetrically arranged front and rear, a slide groove is provided on the inner wall of the box body (1), the transverse plate (301) is slidably connected in the slide groove, a plurality of knocking rods (302) are fixedly connected to the top of the transverse plate (301), a first spring (303) is connected between the transverse plate (301) and the bottom wall of the slide groove, a connecting frame (304) is fixedly connected between the front and rear groups of the transverse plates (301), the knocking mechanism further comprises a power assembly, the power assembly is used to drive the connecting frame (304) to move up and down, and a dust prevention mechanism (4) is provided in the feed funnel (101).

2. A recycled aggregate multi-stage screening device according to claim 1, characterized in that: The power assembly comprises a plurality of rotating shafts (306) rotatably connected between the inner walls of the housing (1); a cam (307) is fixedly connected to the rotating shaft (306); the cam (307) is located above the connecting frame (304); a rotating motor (305) is fixedly connected to one side of the housing (1); an output end of the rotating motor (305) is connected to one of the rotating shafts (306) via a coupling; and a synchronous belt (308) is connected between two adjacent rotating shafts (306).

3. A recycled aggregate multi-stage screening device according to claim 2, characterized in that: A plurality of evenly distributed connecting frames (304) are fixedly connected between two corresponding front and rear transverse plates (301), and a cam (307) is disposed above each connecting frame (304).

4. The multi-stage screening device for recycled aggregate according to claim 1, characterized in that: The distance between two adjacent knocking rods (302) decreases as the distance from the feeding funnel (101) decreases.

5. The multi-stage screening device for recycled aggregate according to claim 1, characterized in that: The dust prevention mechanism (4) comprises two baffles (401) hinged to the inner wall of the feeding funnel (101), and a second spring (402) is connected between the bottom of the baffle (401) and the inner wall of the feeding funnel (101).

6. The multi-stage screening device for recycled aggregate according to claim 1, characterized in that: A plurality of first discharge pipes (102) are fixedly connected to one side of the box body (1), and the first discharge pipes (102) are located at the lower end of the screen (2). A second discharge pipe (103) is fixedly connected to one side of the box body (1), and the second discharge pipes (103) are located below the first discharge pipes (102).

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