Screening device for crushed metal scraps

Abstract

The screening device comprises a frame body, a screening frame which is suspended on the frame body and is in an inclined state, a screen mesh is arranged in the screening frame, a waste material opening is formed in the front end of the screen mesh, and finished product openings are formed in the two sides, at the bottom of the screen mesh, of the screening frame. And a driving component for driving the sweeps on the screen to move reversely is also arranged on the frame body. The driving component comprises a sleeve hinged to the frame body, a driving rod is arranged in the sleeve in a vertically movable penetrating mode, and a driving plate capable of making contact with the surface of the screen is arranged at the bottom end of the driving rod. The driving component can reversely drive the sweeps to move towards the feeding hopper, so that the sweeps move towards the waste opening from the upper top side of the screen again, secondary screening operation is achieved, complete screening operation can be achieved on the sweeps which are discharged too fast, and the screening efficiency is improved. The problems that small particles and large particles are discharged from a waste port at the same time, follow-up overall screening needs to be carried out, the operation time is prolonged, and cost is increased are solved.

Description

Technical Field

[0001] This application relates to the field of screening technology for crushed metal scrap, and more particularly to a screening device for crushed metal scrap. Background Technology

[0002] Metal scrap crushing is the initial processing step in metal recycling. Its purpose is to break large, irregular, or tangled metal scraps into smaller particles to facilitate subsequent screening, sorting, and reuse. Crushing methods mainly include low-speed shearing and cutting; penetration and compression; rolling and peeling; and high- and medium-speed impact, friction, and compression.

[0003] After crushing, metal scrap needs to be screened to separate metal particles of different sizes for subsequent reuse. Current screening methods primarily include mechanical screening, which uses sieves and vibrating screens. The crushed metal scrap is placed in the sieve; under vibration, smaller metal particles pass through the screen, while larger pieces remain and are manually removed. This method can simultaneously screen out metal particles of different sizes and has high screening efficiency.

[0004] The structure of the mechanical screening is as shown in the instruction manual. Figure 1 As shown, the system includes a frame, on which a screening frame (usually suspended by flexible straps, vibrating continuously relative to the frame during operation) is suspended at an angle. A feed hopper is located at the top of one side of the screening frame. A screen is positioned in the middle of the screening frame, with a waste (large particle) inlet at the front of the screen and finished product (small particle) inlets on both sides of the bottom of the screen. During operation, crushed waste is poured into the feed hopper and slowly discharged through the outlet at the bottom of the feed hopper, falling onto the screen. The vibration of the screen causes the small particles to fall through the mesh onto the inner bottom surface of the screening frame, and then, along the inclined surface and due to vibration, are collected from the finished product inlets on both sides. Unscreened large particles move along the screen surface to the waste inlets for output and collection.

[0005] During the waste screening process described above, the waste falling onto the screen moves towards the waste outlet along its inclined surface and under the action of vibration. When the discharge is too fast, the waste (including large and small particles) accumulates on the screen. When the waste moves to the discharge outlet, it cannot be completely separated. That is, some small particles to be separated are piled up among the large particles and are not completely dislodged by vibration. They are discharged through the waste outlet at the same time as the large particles, resulting in a reduction in the amount of small waste particles screened. Usually, the discharged large waste particles need to be added again through the feed hopper for screening, which increases the screening time and increases the operating cost. Summary of the Invention

[0006] To address the aforementioned problems, this application aims to provide a screening device for crushed metal scrap, which can fully screen the scrap accumulated on the screen, thus solving the problem of increased operation time and cost caused by small and large particles being discharged from the waste outlet at the same time and requiring subsequent overall screening.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: a screening device for crushed metal scrap includes a frame, a screening frame suspended on the frame and in an inclined state, a feed hopper provided on the top of one side of the screening frame, a screen provided in the middle layer of the screening frame, a waste inlet provided at the front end of the screen, and finished product inlets provided on both sides of the screening frame at the bottom of the screen, characterized in that: a driving component is also provided on the frame to drive the scrap on the screen to move in the opposite direction.

[0008] Preferably, the driving component includes a sleeve hinged to the frame, a driving rod that can move vertically through the sleeve, and a driving plate that can contact the screen surface at the bottom end of the driving rod.

[0009] Preferably, the drive rod and the sleeve are spring sleeve structures, so that when no force is applied to the drive rod, the drive plate is detached from the screen surface and a gap remains.

[0010] Preferably, a blocking protrusion higher than its surface is provided on the screen near the waste inlet, and the surface of the blocking protrusion is an arc-shaped structure.

[0011] The beneficial effects of this application are: the drive component can drive the waste to move in the opposite direction toward the feed hopper, so that the waste moves again from the top side of the screen toward the waste outlet, realizing a second screening operation. This allows for a complete screening operation of waste that is discharged too quickly, solving the problem of increased operation time and cost caused by small particles and large particles being discharged from the waste outlet at the same time and requiring subsequent overall screening. Attached Figure Description

[0012] Figure 1 This is a structural diagram of current metal scrap screening equipment.

[0013] Figure 2 This is a top-down view of the filter box structure.

[0014] Figure 3 Set the top view of the driver board structure in the filter box for this application.

[0015] Figure 4 For this application Figure 3 Side view structural diagram.

[0016] Figure 5This diagram illustrates the reverse drive of the drive plate in this application to reverse the flow of waste debris accumulated on the screen.

[0017] Figure 6 The illustration shows a blocking protrusion structure provided in this application near the waste outlet of the screen.

[0018] Figure 7 This is a physical illustration of current metal scrap screening equipment.

[0019] In the diagram: 8 - Soft suspension belt. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See attached document Figures 1-6 The device shown is a screening device for crushed metal scrap, comprising a frame 1, a screening frame 2 suspended on the frame 1 in an inclined state, a feed hopper 3 located at the top of one side of the screening frame 2, a screen 4 located in the middle layer of the screening frame 2, a waste inlet 2a located at the front end of the screen 4, and finished product inlets 2b located on both sides of the screening frame 2 at the bottom of the screen 4. During the screening operation, the crushed scrap... Figure 1 As shown, the crushed waste is poured into the feed hopper 3 and slowly discharged through the outlet at the lower end of the feed hopper 3, causing the waste to fall onto the screen 4. Through the vibration of the screen 4, the small particles of waste that have been screened fall from the mesh of the screen 4 into the inner bottom surface of the screening frame 2, and are discharged from the finished product outlets 2b on both sides along the inclined surface of the screening frame 2 and under the action of vibration, and are collected. The large particles that have not been screened move along the surface of the screen 4 to the waste outlet 2a for discharge and collection.

[0022] To address the current issues of waste accumulation due to excessively rapid material feeding during screening, and the simultaneous discharge of small and large waste particles from the waste outlet 2a, requiring re-screening, this application further includes a drive component on the frame 1 to reverse the movement of waste particles on the screen 4. During operation, when waste particles falling through the feed hopper 3 move to the waste outlet 2a on the surface of the screen 4, the drive component reverses the movement, causing the waste particles to move back towards the feed hopper 3. This allows the waste particles to move again from the top of the screen 4 towards the waste outlet 2a, achieving a second screening operation. This allows for complete screening of waste particles fed too quickly, resolving the increased processing time and costs caused by the simultaneous discharge of small and large particles from the waste outlet 2b, necessitating subsequent overall screening.

[0023] Specifically, such as Figure 3-4As shown, the driving component includes a sleeve 5 hinged to the frame 1. A driving rod 6 is vertically movable within the sleeve 5, and a driving plate 7 is provided at the bottom end of the driving rod 6, which can contact the surface of the screen 4. During operation, when a thick layer of waste accumulates on the screen 4 near the waste inlet 2a, the operator drives the driving rod 6 to rotate and move downwards. The driving plate 7 then contacts the surface of the screen 4, driving the accumulated waste on the screen 4 towards the feed hopper 4. Figure 5 As shown, this achieves stratification of accumulated waste and thorough screening on screen 4, effectively solving the problem of small waste particles accumulating among larger waste particles and being discharged from waste outlet 2a. When the waste layer on screen 4 is thin, the reverse drive of drive plate 7 is not required, and the thin layer of waste can be completely screened.

[0024] To further simplify the above operations, the drive rod 6 and sleeve 5 form a spring-sleeve structure. When no force is applied to the drive rod 6, the drive plate 7 is detached from the surface of the screen 4, leaving a gap. That is, when the drive plate 7 is not needed, the spring-sleeve structure drives it away from the screen 4 surface, preventing obstruction of the movement of waste debris on the screen 4. When the waste debris accumulates thickly, the drive rod 6 is pressed down and flipped, causing the drive plate 7 to contact the screen 4 surface, driving the accumulated waste debris backward and thinning it. After the drive is complete, the force of the spring-sleeve allows the drive plate 7 to automatically return to its original position and detach from the screen 4 surface, thereby improving operational convenience.

[0025] The crushed waste particles are usually small. During the reverse drive of the waste accumulated on the screen 4 via the drive plate 7, the small particle size prevents the accumulated waste from being completely driven backward. Therefore, to solve this problem, such as... Figure 6 As shown, a blocking protrusion 41, higher than its surface, is provided on the screen 4 near the waste inlet 2a, and the surface of the blocking protrusion 41 is an arc-shaped structure. When waste debris not driven in the reverse direction by the drive plate 7 moves towards the waste inlet 2a after leaving the drive plate, it comes into contact with the blocking protrusion 41 and is obstructed, slowing down the movement speed of the waste debris towards the waste inlet 2a, that is, increasing the residence time of the waste debris on the screen 4. Under the continuous vibration of the screen 4, this part of the waste debris can be subjected to a second vibration screening operation, thereby further improving the integrity of waste debris screening. Under the vibration, large particles of waste debris, after accumulating to a large extent, can jump over the surface of the blocking protrusion 41 and be discharged from the waste inlet 2a.

[0026] The principle of this application is as follows: During the screening operation, the crushed waste is poured into the feed hopper 3 and slowly discharged through the outlet at the lower end of the feed hopper 3, causing the waste to fall onto the screen 4. Through the vibration of the screen 4, the small particles of waste that have been screened fall from the mesh of the screen 4 into the inner bottom surface of the screening frame 2, and are discharged and collected from the finished product outlets 2b on both sides along the inclined surface of the screening frame 2 and the vibration. The large particles that have not been screened move along the surface of the screen 4 to the waste outlet 2a for discharge and collection.

[0027] When a thick layer of waste accumulates on the screen 4 near the waste inlet 2a, the operator drives the drive rod 6 to rotate and move downwards. The drive plate 7 then contacts the surface of the screen 4, driving the accumulated waste towards the feed hopper 4, thus achieving layered screening of the accumulated waste. After the waste leaves the drive plate 7, it comes into contact with the blocking protrusion 41 and is obstructed, slowing down the movement of the waste towards the waste inlet 2a. This increases the residence time of the waste on the screen 4. Under the continuous vibration of the screen 4, this portion of waste can be screened again, further improving the integrity of waste screening. Under the vibration, large particles of waste, after accumulating a large amount, can jump over the surface of the blocking protrusion 41 and be discharged from the waste inlet 2a.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this application. Various changes and modifications may be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A screening device for crushed metal scrap, comprising a frame (1), a screening frame (2) suspended on the frame (1) and in an inclined state, a feed hopper (3) provided on the top of one side of the screening frame (2), a screen (4) provided in the middle layer of the screening frame (2), a waste inlet (2a) provided at the front end of the screen (4), and finished product inlets (2b) provided on both sides of the screening frame (2) at the bottom of the screen (4), characterized in that: A drive component is also provided on the frame (1) to drive the waste on the screen (4) to move in the opposite direction.

2. The screening device according to claim 1, characterized in that: The driving component includes a sleeve (5) hinged to the frame (1), a driving rod (6) that can move vertically through the sleeve (5), and a driving plate (7) that can contact the surface of the screen (4) at the bottom end of the driving rod (6).

3. The screening device according to claim 2, characterized in that: The drive rod (6) and the sleeve (5) are spring sleeve structures. When no force is applied to the drive rod (6), the drive plate (7) is separated from the surface of the screen (4) and a gap remains.

4. The screening device according to claim 3, characterized in that: A blocking protrusion (41) higher than its surface is provided on the screen (4) near the waste inlet (2a), and the surface of the blocking protrusion (41) is an arc surface structure.

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