Resin sand recovery magnetic separation apparatus

Abstract

This utility model relates to the field of resin sand recycling technology, specifically a magnetic separation device for resin sand recycling. It includes a screening box, multiple magnets, multiple first transmission belt mechanisms, and multiple second transmission belt mechanisms. The multiple first transmission belt mechanisms are arranged side-by-side inside the screening box on the left side, and the multiple second transmission belt mechanisms are arranged side-by-side inside the screening box on the right side. Each of the multiple first and second transmission belt mechanisms includes a transmission belt, a first transmission roller, and a second transmission roller; multiple magnets are located inside the multiple transmission belts. This technical solution employs a multi-layered, staggered, inclined transmission belt layout, forming a stepped screening path, extending the material throughput time, and significantly improving magnetic separation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of resin sand recycling technology, and in particular to a magnetic separation device for resin sand recycling. Background Technology

[0002] When resin sand is used in casting production, the used resin sand needs to be recycled. However, during the recycling process, the resin sand will be mixed with metal slag from the casting, which needs to be removed. Therefore, recycling magnetic separation equipment is used.

[0003] Currently, common resin sand magnetic separation equipment mainly uses permanent magnet drums or fixed magnetic separation belts, which have the following technical defects:

[0004] 1. Material accumulation problem: Traditional magnetic separators are mostly single-layer screening structures, which makes it easy for materials to accumulate during the magnetic separation process. This prevents some magnetic impurities from fully contacting the magnetic field, resulting in incomplete screening and affecting the purity of the recovered sand. 2. Magnetic saturation requires machine shutdown for cleaning: The magnetic separation mechanism of existing equipment is mostly a static adsorption design. When the magnetic adsorption reaches saturation, the machine must be shut down for manual cleaning, which not only affects production efficiency but also increases labor maintenance costs. 3. Low screening efficiency: Due to the lack of an effective material dispersion mechanism, resin sand has poor fluidity during the magnetic separation process. Some fine iron filings may be missed because they are not fully exposed to the magnetic field, resulting in low magnetic separation efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a magnetic separation device for resin sand recovery.

[0006] The technical solution of this utility model is a magnetic separation device for resin sand recycling, which includes a screening box, a first drive assembly, a second drive assembly, a second inclined trough plate, multiple first inclined trough plates, multiple magnets, multiple first transmission belt mechanisms, and multiple second transmission belt mechanisms.

[0007] A base frame is provided at the bottom of the screening box; multiple first transmission belt mechanisms are arranged side by side on the left side inside the screening box, and multiple second transmission belt mechanisms are arranged side by side on the right side inside the screening box. Both the multiple first and second transmission belt mechanisms are inclined and are spaced apart and interlaced with each other. Each of the multiple first and second transmission belt mechanisms includes a transmission belt, a first transmission roller, and a second transmission roller. The first and second transmission rollers are rotatably mounted on the screening box, and the transmission belt is sleeved on the first and second transmission rollers. A first drive assembly is mounted on the screening box to drive the multiple first transmission belt mechanisms to move synchronously. A second drive assembly is mounted on the screening box to drive the multiple second transmission belt mechanisms to move synchronously. Multiple magnets are located on the inner side of the multiple transmission belts and are connected to the inner wall of the screening box. The cross-section of the magnets is approximately "J" shaped. Multiple first inclined trough plates are located below the multiple transmission belts and penetrate through the inner and outer sides of the screening box. Second inclined trough plates are located at the bottom of the screening box and penetrate through the inner and outer sides of the screening box.

[0008] Preferably, the screening box is slidably mounted on a base frame, and a cylinder for driving the screening box to move linearly is mounted on the base frame.

[0009] Preferably, the upper part of the screening box has a feeding hole, and a feeding funnel is provided inside the feeding hole. There are gaps between the bottom two ends of the feeding funnel and the feeding hole. A fixing frame is connected between the feeding funnel and the base frame.

[0010] Preferably, the first drive assembly includes a first servo motor and multiple sets of first transmission assemblies. Two first transmission rollers that are vertically adjacent to each other are connected by the first transmission assemblies. The first transmission assembly includes a first belt and two first pulleys. The two first pulleys are respectively installed on the outer ends of the shafts of the two first transmission rollers and are connected by the first belt. The first servo motor is installed on the screening box and its output shaft is connected to the shaft of the first transmission roller.

[0011] Preferably, the second drive assembly includes a second servo motor and multiple sets of second transmission assemblies. Two second transmission rollers that are vertically adjacent to each other are connected by the second transmission assemblies. The second transmission assembly includes a second belt and two second pulleys. The two second pulleys are respectively installed on the outer ends of the shafts of the two second transmission rollers, and the two second pulleys are connected by the second belt.

[0012] Preferably, the screening box has two partitions inside, and each partition has multiple through holes for the transmission belt to pass through.

[0013] Preferably, inclined plates are provided above the top ends of multiple transmission belts, and the inclined plates are connected to the inner wall of the screening box.

[0014] Preferably, scrapers are provided at the bottom ends of multiple transmission belts, and the scrapers are connected to the inner wall of the screening box.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] 1. The multi-layered staggered inclined conveyor belt layout forms a stepped screening path, which extends the material throughput time and significantly improves the magnetic separation efficiency.

[0017] 2. Combined with the dynamic adsorption mechanism of electromagnets, the magnet is energized to attract the magnet and then disengaged by the transmission belt, realizing continuous operation.

[0018] 3. The screening box is driven by a cylinder to reciprocate and vibrate, which forces the material to spread evenly and disperse it evenly on the surface of the transmission belt. This avoids the magnetic separation blind zone caused by accumulation in traditional equipment and improves the adsorption efficiency per unit area. Attached Figure Description

[0019] Figure 1 and Figure 2 All of these are schematic diagrams of the structure of this utility model.

[0020] Figure 3 and Figure 4 All of these are cross-sectional views of this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the transmission belt, magnet, first transmission roller and second transmission roller in this utility model.

[0022] Reference numerals: 1. Screening box; 101. Feed hole; 2. Transmission belt; 3. Magnet; 4. Inclined plate; 5. First inclined trough plate; 6. Base frame; 7. Cylinder; 8. Second inclined trough plate; 9. Feed hopper; 10. First servo motor; 111. First belt; 112. Second belt; 121. First pulley; 122. Second pulley; 13. Separating baffle; 14. Fixing frame; 15. Scraper; 161. First transmission roller; 162. Second transmission roller; 17. Second servo motor. Detailed Implementation

[0023] Example 1

[0024] like Figures 1-5 As shown in the figure, the resin sand recycling magnetic separation device proposed in this embodiment includes a screening box 1, a first drive assembly, a second drive assembly, a second inclined trough plate 8, multiple first inclined trough plates 5, multiple magnets 3, multiple first transmission belt mechanisms, and multiple second transmission belt mechanisms.

[0025] A base frame 6 is provided at the bottom of the screening box 1; multiple first transmission belt mechanisms are arranged side by side on the left side inside the screening box 1, and multiple second transmission belt mechanisms are arranged side by side on the right side inside the screening box 1. Both the multiple first transmission belt mechanisms and the multiple second transmission belt mechanisms are inclined, and the multiple first transmission belt mechanisms and the multiple second transmission belt mechanisms are spaced apart from each other and intersected with each other.

[0026] Multiple first transmission belt mechanisms and multiple second transmission belt mechanisms each include a transmission belt 2, a first transmission roller 161, and a second transmission roller 162. The first transmission roller 161 and the second transmission roller 162 are rotatably mounted on the screening box 1, and the transmission belt 2 is sleeved on the first transmission roller 161 and the second transmission roller 162. A first drive assembly is mounted on the screening box 1 to drive the multiple first transmission belt mechanisms to move synchronously. The first drive assembly includes a first servo motor 10 and multiple sets of first transmission assemblies. Two first transmission rollers 161 that are vertically adjacent are connected by a first transmission assembly. The first transmission assembly includes a first belt 111 and two first pulleys 121, wherein the two first pulleys 121 are respectively mounted on two first transmission rollers 161. At the outer end of the shaft of 61, two first pulleys 121 are connected by a first belt 111. A first servo motor 10 is mounted on the screening box 1 and its output shaft is connected to the shaft of the first transmission roller 161. A second drive assembly is mounted on the screening box 1 to drive multiple second transmission belt mechanisms to move synchronously. The second drive assembly includes a second servo motor 17 and multiple sets of second transmission assemblies. Two second transmission rollers 162 that are adjacent in the same vertical direction are connected by the second transmission assembly. The second transmission assembly includes a second belt 112 and two second pulleys 122. The two second pulleys 122 are respectively mounted at the outer ends of the shafts of the two second transmission rollers 162, and the two second pulleys 122 are connected by the second belt 112.

[0027] An inclined plate 4 is provided above the top of each of the multiple transmission belts 2, and the inclined plate 4 is connected to the inner wall of the screening box 1.

[0028] Multiple magnets 3 are located on the inner side of multiple transmission belts 2. The magnets 3 are connected to the inner wall of the screening box 1. The cross-section of the magnets 3 is approximately "J" shaped.

[0029] Multiple first inclined plates 5 are located below multiple transmission belts 2, and the first inclined plates 5 penetrate the inner and outer sides of the screening box 1.

[0030] Each of the multiple transmission belts 2 is equipped with a scraper 15 at its bottom end, and the scraper 15 is connected to the inner wall of the screening box 1; the second inclined trough plate 8 is located at the bottom of the screening box 1 and penetrates the inner and outer sides of the screening box 1.

[0031] The screening box 1 has two partition plates 13 inside, and multiple through holes for the transmission belt 2 to pass through are opened on both sides of the partition plates 13.

[0032] It should be added that a PLC controller is used to control the equipment in this technical solution.

[0033] The working principle of this technical solution is as follows:

[0034] Screening stage: The resin sand mixture is put into the screening box 1. The material slides down on the inclined conveyor belt 2. At this time, the electromagnet 3 located inside the conveyor belt 2 is energized to generate a strong magnetic field, which adsorbs the magnetic substances in the material, such as iron filings, onto the surface of the conveyor belt 2. The non-magnetic resin sand continues to slide down to the next layer of the conveyor belt 2 due to gravity.

[0035] Multi-layer screening design: The first transmission belt mechanism on the left and the second transmission belt mechanism on the right are arranged alternately to form a stepped path. As the material slides down layer by layer, the inclined angle of the transmission belt 2 causes the material to be constantly turned over and spread out, avoiding accumulation. Magnetic materials are attracted by magnets on the surface of each transmission belt 2, while non-magnetic resin sand falls into the lower layer through the gap at the bottom of the transmission belt 2, thereby extending the screening path and improving magnetic separation efficiency.

[0036] Magnetic material separation design: When the magnetic material on the surface of the transmission belt 2 reaches saturation, the first servo motor 10 and the second servo motor 17 are started, driving all transmission belts 2 to operate synchronously. The area of ​​the transmission belt 2 that has adsorbed the magnetic material moves to the bottom non-magnetic contact area 3. As the magnetism weakens or disappears, the magnetic material detaches from the belt surface and falls into the first inclined plate 5 below.

[0037] Scraper 15 assists in removal: Scraper 15 at the bottom of the transmission belt 2 scrapes away residual magnetic material to ensure complete removal.

[0038] Magnetic material discharge: The magnetic material slides out of the screening box 1 along the first inclined plate 5, realizing recycling.

[0039] Non-magnetic material discharge: After passing through all magnetic separation layers, the pure resin sand falls into the second inclined plate 8 at the bottom of the screening box 1 and is discharged from the screening box 1 through the second inclined plate 8.

[0040] Leakage prevention measures: The inclined plate 4 at the top of the transmission belt prevents the material from sliding down the gap between the transmission belt 2 and the box wall, ensuring that all the material passes through the magnetic separation; the partition baffle 13 isolates the space on both sides of the magnet to prevent the material from entering the non-magnetic separation area.

[0041] It should be added that, for the installation of magnet 3, an annular groove is provided on the second transmission roller 162, and the end of magnet 3 is embedded in the annular groove of the second transmission roller 162 to ensure that magnet 3 is tightly attached to the inner side of transmission belt 2.

[0042] Example 2

[0043] like Figure 1 and Figure 2 As shown, in this embodiment, a magnetic separation device for resin sand recycling is proposed. Compared with the first embodiment, in this embodiment, the screening box 1 is slidably installed on the base frame 6, and the base frame 6 is equipped with a cylinder 7 for driving the screening box 1 to move linearly. The upper part of the screening box 1 is provided with a feed hole 101, and a feed funnel 9 is provided inside the feed hole 101. There are gaps between the bottom two ends of the feed funnel 9 and the feed hole 101. A fixing frame 14 is connected between the feed funnel 9 and the base frame 6.

[0044] In this embodiment, the resin sand mixture enters the screening box 1. Since there is a gap between the bottom of the feeding funnel 9 and the feeding hole 101, and the screening box 1 is driven by the cylinder 7 to reciprocate, the material is evenly spread out and falls onto the surface of the uppermost transmission belt 2, which causes the material to vibrate, which helps to flatten the material.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A magnetic separation device for resin sand recovery, characterized in that, It includes a screening box (1), a first drive assembly, a second drive assembly, a second inclined plate (8), multiple first inclined plates (5), multiple magnets (3), multiple first transmission belt mechanisms, and multiple second transmission belt mechanisms; A base frame (6) is provided at the bottom of the screening box (1); multiple first transmission belt mechanisms are arranged side by side on the left side inside the screening box (1), and multiple second transmission belt mechanisms are arranged side by side on the right side inside the screening box (1). Both the multiple first transmission belt mechanisms and the multiple second transmission belt mechanisms are inclined. The multiple first transmission belt mechanisms and the multiple second transmission belt mechanisms are spaced apart from each other and intersected with each other. Both the multiple first transmission belt mechanisms and the multiple second transmission belt mechanisms include a transmission belt (2), a first transmission roller (161), and a second transmission roller (162). The first transmission roller (161) and the second transmission roller (162) are rotatably mounted on the screening box (1), and the transmission belt (2) is sleeved on the screening box (1). The first drive roller (161) and the second drive roller (162) are mounted on the screening box (1) to drive multiple first drive belt mechanisms to move synchronously; the second drive assembly is mounted on the screening box (1) to drive multiple second drive belt mechanisms to move synchronously; multiple magnets (3) are located on the inner side of multiple drive belts (2), the magnets (3) are connected to the inner wall of the screening box (1), and the cross-section of the magnets (3) is approximately "J" shaped; multiple first inclined plates (5) are located below multiple drive belts (2), and the first inclined plates (5) penetrate the inner and outer sides of the screening box (1); the second inclined plate (8) is located at the lower part of the screening box (1) and penetrates the inner and outer sides of the screening box (1).

2. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, The screening box (1) is slidably mounted on the base frame (6), and the base frame (6) is equipped with a cylinder (7) for driving the screening box (1) to move linearly.

3. The resin sand recycling magnetic separation equipment according to claim 2, characterized in that, The screening box (1) has a feed hole (101) at the top. A feed funnel (9) is provided inside the feed hole (101). There are gaps between the bottom two ends of the feed funnel (9) and the feed hole (101). A fixing frame (14) is connected between the feed funnel (9) and the base frame (6).

4. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, The first drive assembly includes a first servo motor (10) and multiple sets of first transmission assemblies. Two first transmission rollers (161) that are vertically adjacent to each other are connected by the first transmission assembly. The first transmission assembly includes a first belt (111) and two first pulleys (121). The two first pulleys (121) are respectively installed on the outer ends of the shafts of the two first transmission rollers (161). The two first pulleys (121) are connected by the first belt (111). The first servo motor (10) is installed on the screening box (1) and its output shaft is connected to the shaft of the first transmission roller (161).

5. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, The second drive assembly includes a second servo motor (17) and multiple sets of second transmission assemblies. Two second transmission rollers (162) that are in the same vertical direction and are adjacent to each other are connected by the second transmission assembly. The second transmission assembly includes a second belt (112) and two second pulleys (122). The two second pulleys (122) are respectively installed on the outer ends of the shafts of the two second transmission rollers (162), and the two second pulleys (122) are connected by the second belt (112).

6. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, The screening box (1) has two partitions (13) inside, and multiple through holes for the transmission belt (2) to pass through are provided on both sides of the partitions (13).

7. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, An inclined plate (4) is provided above the top of each of the multiple transmission belts (2), and the inclined plate (4) is connected to the inner wall of the screening box (1).

8. The resin sand recycling magnetic separation equipment according to claim 1, characterized in that, Each of the multiple transmission belts (2) has a scraper (15) at its bottom end, and the scraper (15) is connected to the inner wall of the screening box (1).

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