Grinding and screening device for recycling of foundry sand

Abstract

The utility model discloses a grinding and screening device for foundry waste sand recovery belongs to foundry waste sand recovery technical field. Grinding and screening device for foundry waste sand recovery, including screening box, be equipped with several levels of sieve basket in the screening box, place the grinding ball in the sieve basket, and the sieve basket is connected through the linkage of connecting rod, and the upper end of connecting rod is connected with the cylinder, drives sieve basket both ends to shake up and down, and the bottom of screening box is equipped with the inclined export bottom plate. The utility model discloses through the sieve basket shaking and the synergistic effect of grinding ball, realizes the synchronous crushing and grading of waste sand, improves the processing efficiency, and the multistage screen is matched with the electromagnetic adsorption plate, and the automatic separation of grindable and ungrindable material is avoided, and the shaking design of export bottom plate avoids the accumulation of fine sand, ensures the screening continuity, and the sieve basket is inclined and shakes continuously, and the combined grinding ball impact, effectively prevents the mesh blockage, and the structure of screening box is closed and the design of guide material passage.

Description

Technical Field

[0001] This utility model relates to the field of foundry waste sand recycling technology, and more specifically, to a grinding and screening device for foundry waste sand recycling. Background Technology

[0002] The existing foundry waste sand is ground and graded simultaneously using ordinary vibrating screens or crushers. Large particles of impurities are easily left behind, and multi-layer screens are prone to clogging, requiring frequent shutdowns for cleaning. In addition, dust is seriously emitted during material transfer, and the grinding and screening actions are separated, requiring manual intervention and adjustment, resulting in large fluctuations in the quality of recycled sand. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a grinding and screening device for the recycling of foundry waste sand, thereby solving the above-mentioned deficiencies.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A grinding and screening device for recycling foundry waste sand includes a screening box, which contains several stages of sieves. Grinding balls are placed in the sieves. The sieves are linked together by a connecting rod. The upper end of the connecting rod is connected to a cylinder, which drives the two ends of the sieves to shake up and down. The bottom of the screening box is provided with an inclined guide plate. When the connecting rod moves down, it hits the guide plate and causes shaking.

[0006] Preferably, the sieve basket includes a frame, a bottom sieve, side sieves, and an adsorption plate. The bottom sieve is provided at the bottom of the frame, and rotating blocks are symmetrically arranged on both sides of the frame. The rotating blocks are movably connected to the inner wall of the screening box. A connecting ear is provided at one end of the frame, and a side sieve is provided at the end of the frame away from the connecting ear. An adsorption plate is magnetically connected to the side sieve.

[0007] Preferably, the side screen is attracted to the adsorption plate by an electromagnet, and the upper end of the adsorption plate is hinged to the frame. After the power is turned off, the adsorption plate automatically opens to discharge slag.

[0008] Preferably, the bottom screen mesh diameter of the sieve basket decreases gradually from top to bottom, and the bottom screen mesh area of ​​the upper sieve basket is smaller than its opening area.

[0009] Preferably, baffles are provided above both ends of the frame, and inclined guide plates are provided on the side walls of the screening box, forming a closed guide channel with the baffles.

[0010] Preferably, the bottom plate is installed at an angle using support springs of different heights, with its high end located directly below the connecting rod.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0012] This utility model relates to a grinding and screening device for recycling foundry waste sand. Through the synergistic action of the shaking screen basket and grinding balls, it achieves simultaneous crushing and grading of waste sand, improving processing efficiency. The multi-stage screen, combined with the electromagnetic adsorption plate, automatically separates grindable and non-grindable materials. The shaking design of the bottom plate prevents fine sand accumulation and ensures continuous screening. Furthermore, the continuous shaking of the tilted screen basket, combined with the impact of the grinding balls, effectively prevents mesh clogging. The enclosed structure of the screening box and the material guide channel design reduce dust emission. The cylinder drives the screen basket, simplifying the transmission mechanism and reducing maintenance costs. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the grinding and screening device for recycling foundry waste sand according to this utility model.

[0014] Figure 2 This is a cross-sectional view of the grinding and screening device for recycling foundry waste sand according to this utility model.

[0015] Figure 3 This is a grinding state diagram of the grinding and screening device for recycling foundry waste sand according to this utility model;

[0016] Figure 4 This is a diagram showing the working state of the adsorption plate of this utility model;

[0017] Figure 5 This is a structural diagram of the sieve basket of this utility model.

[0018] In the diagram: 1. Screening box; 11. Guide plate; 2. Screen basket; 21. Frame; 211. Rotating block; 212. Connecting ear; 213. Baffle; 22. Bottom screen; 23. Side screen; 24. Adsorption plate; 25. Grinding ball; 3. Connecting rod; 31. Cylinder; 32. Mounting hole; 4. Outlet bottom plate; 41. Support spring. Detailed Implementation

[0019] 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.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figures 1-5The present invention relates to a grinding and screening device for recycling foundry waste sand, comprising a screening box 1, wherein several screen baskets 2 are arranged inside the screening box 1, and grinding balls 25 are arranged inside the screen baskets 2. One end of the screen basket 2 is connected by a connecting rod 3, and the connecting rod 3 drives the two ends of the screen basket 2 to shake up and down. The grinding balls 25 reciprocate to grind the foundry waste sand inside the screen basket 2. The connecting rod 3 enables the screen baskets 2 to work synchronously. A discharge bottom plate 4 is provided at the lower end of the screening box 1. The connecting rod 3 moves up and down and intermittently contacts the discharge bottom plate 4. The discharge bottom plate 4 shakes and accelerates the material to slide down.

[0022] Specifically, the upper end of the connecting rod 3 is connected to a cylinder 31, which is fixed to the outside of the screening box 1. The piston rod of the cylinder 31 extends into the screening box 1 and is fixedly connected to the upper end of the connecting rod 3. The cylinder 31 drives the connecting rod 3 to move up and down. The connecting rod 3 has an installation hole 32, which is connected to the screen basket 2 through a rotating shaft.

[0023] More specifically, the sieve basket 2 includes a frame 21, a bottom screen 22, side screens 23, and an adsorption plate 24. The bottom screen 22 is provided at the bottom of the frame 21, and rotating blocks 211 are symmetrically arranged on both side walls of the frame 21. The rotating blocks 211 are movably connected to the inner wall of the screening box 1. At the same time, a connecting ear 212 is provided at one end of the frame 21. The connecting ear 212 has an elliptical hole that fits into the rotating shaft in the mounting hole 32. The position of the sieve basket 2 is fixed by the connecting ear 212 and the rotating block 211. Under the push of the connecting rod 3, the sieve basket 2 rotates around the rotating block 211, changing the height of both ends of the sieve basket 2. The side screen 23 is provided at the end of the frame 21 away from the connecting ear 212. The mesh size of the side screen 23 is smaller than that of the grinding balls inside the sieve basket 2. The diameter of the screen 25 allows foundry waste sand to pass through the side screen 23. The grinding balls 25 are intercepted in the screen basket 2. An adsorption plate 24 is magnetically connected to the side screen 23, and the upper end of the adsorption plate 24 is hinged to the frame 21. The magnetic attraction is achieved by an electromagnet, which can be placed inside the frame 21. When grinding the foundry waste sand, the electromagnet is energized, and the adsorption plate 24 is attracted to the side screen 23. When the side screen 23 is not working, the screen basket 2 shakes, and the grinding balls 25 complete the grinding of the foundry waste sand in the screen basket 2. After grinding for a period of time, the foundry waste sand that cannot be ground is discharged from the screen basket 2 through the side screen 23. At this time, the adsorption plate 24 is de-energized, the position of the connecting rod 3 is raised, the screen basket 2 tilts, and the adsorption plate 24 automatically opens under the action of gravity. Figure 4 As shown.

[0024] It should be noted that the bottom screen 22 of the screen basket 2 has a gradually decreasing aperture from top to bottom. The foundry waste sand is screened step by step from top to bottom and ground in the corresponding screen basket 2 to further remove the foundry waste sand that can be ground. The foundry waste sand is graded and ground to improve the grinding effect. The grinding material of the upper screen basket 2 falls into the lower screen basket 2 through the bottom screen 22. In order to ensure that the material is not spilled during grinding, baffles 213 are set above both ends of the frame 21. The baffles 213 can not only block the material, but also guide the material of the upper screen basket 2. When the screen basket 2 needs to discharge the material that cannot be ground, the material of the upper screen basket 2 is discharged through the baffles 213 of the lower screen basket 2. Because the setting of the baffles 213 reduces the opening area of ​​the upper end of the screen basket 2, the area of ​​the bottom screen 22 is smaller than the opening area of ​​the upper end of the screen basket 2 to prevent the material from spilling.

[0025] To facilitate the discharge of non-grindable materials from the screen basket 2, a guide plate 11 corresponding to the screen basket 2 is provided on the side wall of the screening box 1. The guide plate 11 is inclined. When the end of the screen basket 2 closest to the connecting rod 3 is raised to its highest position, the baffle 213 connects with the guide plate 11 to form a complete guide channel, which discharges the graded materials from different channels. The material screened out by the lowest screen basket 2 is received by the discharge bottom plate 4. The lower end of the discharge bottom plate 4 is provided with a support spring 41. The support springs 41 at both ends of the discharge bottom plate 4 are at different heights, so that the discharge bottom plate 4 is inclined. The higher end of the discharge bottom plate 4 is located at the lower end of the connecting rod 3. When the connecting rod 3 moves to the lowest end, it can contact the discharge bottom plate 4 and squeeze the support spring 41, causing the discharge bottom plate 4 to vibrate and continuously discharge the finest foundry waste sand from the screening box 1.

[0026] Working process: Foundry waste sand enters the top-level screen basket 2. Cylinder 31 drives connecting rod 3 to move up and down reciprocally, causing each level of screen basket 2 to tilt and shake synchronously. Grinding balls 25 roll and collide with the waste sand inside the screen basket 2, achieving crushing. Crustable waste sand falls step by step through the bottom screen 22 to the next level screen basket 2, with the mesh size decreasing step by step. When connecting rod 3 moves down, it impacts the bottom plate 4, causing shaking through the elastic deformation of the support spring 41, accelerating the sliding out of fine sand. Uncrushed coarse particles, after the adsorption plate 24 is de-energized, pull connecting rod 3 to the highest point and are discharged through the side screen 23 to the guide plate 11. The baffles 213 of each level of screen basket 2 and the guide plate 11 form a closed channel to ensure the directional discharge of materials.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A grinding and screening device for the recycling of foundry sand waste, comprising a screening box (1), characterized in that: The screening box (1) is equipped with several sieve baskets (2), and grinding balls (25) are placed in the sieve baskets (2). The sieve baskets (2) are connected by a connecting rod (3). The upper end of the connecting rod (3) is connected to a cylinder (31) to drive the two ends of the sieve baskets (2) to shake up and down. The bottom of the screening box (1) is equipped with an inclined guide plate (4). When the connecting rod (3) moves down, it hits the guide plate (4) and causes shaking.

2. The grinding and screening device for recycling foundry waste sand according to claim 1, characterized in that: The sieve basket (2) includes a frame (21), a bottom screen (22), a side screen (23), and an adsorption plate (24). The bottom screen (22) is provided at the bottom of the frame (21). Rotating blocks (211) are symmetrically arranged on the two side walls of the frame (21). The rotating blocks (211) are movably connected to the inner wall of the screening box (1). A connecting ear (212) is provided at one end of the frame (21). A side screen (23) is provided at the end of the frame (21) away from the connecting ear (212). An adsorption plate (24) is magnetically connected to the side screen (23).

3. The grinding and screening device for recycling foundry waste sand according to claim 2, characterized in that: The side screen (23) is attracted to the adsorption plate (24) by an electromagnet. The upper end of the adsorption plate (24) is hinged to the frame (21). After the power is cut off, the adsorption plate (24) automatically opens to discharge slag.

4. The grinding and screening device for recycling foundry waste sand according to claim 2, characterized in that: The aperture of the bottom screen (22) of the sieve basket (2) decreases gradually from top to bottom, and the area of ​​the bottom screen (22) of the upper sieve basket (2) is smaller than its opening area.

5. The grinding and screening device for recycling foundry waste sand according to claim 2, characterized in that: Baffles (213) are provided above both ends of the frame (21), and inclined guide plates (11) are provided on the side wall of the screening box (1), which together with the baffles (213) form a closed guide channel.

6. The grinding and screening device for recycling foundry waste sand according to claim 1, characterized in that: The bottom plate (4) is installed at an angle by support springs (41) of different heights, with its high end located directly below the connecting rod (3).

Images