Foundry waste sand regeneration device

Abstract

The utility model belongs to the technical field of old sand regeneration, and particularly relates to a foundry waste sand regeneration device. A foundry waste sand regeneration device comprises a vibration shakeout device, a vibration conveying device, a magnetic separation roller machine, a centrifugal crushing device for crushing waste sand, a grinding and shaping device for grinding and shaping the waste sand, a boiling dust removal device for removing dust from the waste sand and a finished product bin for storing finished sand. The centrifugal crushing device comprises a box body, crushing mechanisms which are arranged in the box body in series, a screening mechanism which is arranged in the box body below the crushing mechanisms, and a micro powder extracting mechanism which is used for extracting dust in the box body to a dust filtering bin. According to the utility model, the particle size is controlled during waste sand regeneration through the multi-stage screening device, the particle shape of waste sand particles is controlled through the grinding device, and dust is effectively treated and collected during waste sand regeneration through the double dust removal systems.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste sand regeneration, in particular to a foundry waste sand regeneration device. Background Art

[0002] Waste sand regeneration refers to the process of recovering the performance of the waste sand after casting through processes such as sand dropping, crushing, and screening. After casting, if the binder in most of the sand has not undergone irreversible changes, the original performance of the sand can be restored by removing impurities, cooling and remixing. This treatment method is called old sand reuse. Generally, only clay-bonded sand can be reused. For sand molds and cores hardened by chemical methods, the hardening reaction of the binder is irreversible. In this case, the old sand cannot be simply reused. The failed binder film on the surface of the sand particles needs to be removed to basically restore the performance of the original sand.

[0003] In the prior art, a vibrating sand-falling device is generally used to vibrate the sand mold and the core to break the waste sand into small particles, and then the small-sized waste sand is further crushed or ground in a centrifugal crusher or grinder to achieve the required particle size. The existing waste sand regeneration device generally has technical problems such as the difficulty in controlling the particle size and shape of the waste sand and the difficulty in handling dust during the waste sand regeneration process. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the present application provides a foundry waste sand regeneration device, which controls the particle size during waste sand regeneration through a multi-stage screening device, controls the particle shape of waste sand particles through a grinding device, and effectively treats and collects dust during waste sand regeneration through a double dust removal system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A foundry waste sand regeneration device, comprising:

[0007] Vibrating sand removal device, used to remove the molding sand on the casting;

[0008] A vibrating conveying device, wherein the feeding end of the vibrating conveying device is arranged at the discharge port of the vibrating sand-falling device and a magnetic separation drum machine is arranged above the feeding end of the vibrating conveying device;

[0009] A centrifugal crushing device, whose feed port is connected to the discharge port of the first elevator, and the feed port of the first elevator is connected to the discharge end of the vibrating conveying device;

[0010] A grinding and shaping device, the feed port of which is connected to the discharge port of the second elevator, and the feed port of the second elevator is connected to the discharge port of the centrifugal crushing device;

[0011] A boiling dust removal device, the feed inlet of which is connected to the discharge outlet of the grinding and shaping device;

[0012] A finished product bin, whose feed port is connected to the discharge port of the third elevator, and the feed port of the third elevator is connected to the discharge port of the boiling dust removal device;

[0013] The centrifugal crushing device comprises a box body, crushing mechanisms arranged in series in the box body, a screening mechanism arranged in the box body below the crushing mechanism, and a fine powder extraction mechanism for extracting dust in the box body to a dust filtering bin.

[0014] Preferably, it also includes a temporary storage bin, the discharge port of the temporary storage bin is connected to the feed port of the first elevator, the feed port of the temporary storage bin is connected to the discharge port of the fourth elevator, and the feed port of the fourth elevator is connected to the unloading end of the vibrating conveying device.

[0015] Preferably, the screening mechanism includes a first filter screen and a second filter screen which are fixedly connected and inclined in a box body, the first filter screen and the second filter screen are arranged up and down and the aperture of the first filter screen is larger than the aperture of the second filter screen, and a return pipe and a discharge pipe connected to the inner cavity of the box body are respectively fixedly connected to the box body above the first filter screen and the second filter screen, and a vibration motor is fixedly connected in the box body, and the vibration motor can make the first filter screen and the second filter screen vibrate.

[0016] Preferably, a powder outlet is provided on the box below the second filter, the air inlet of the dust suction fan is connected to the powder outlet, and the air outlet of the dust suction fan is connected to the dust filter bin.

[0017] Preferably, the return pipe is connected to the feed port of the centrifugal crushing device through a return pipeline.

[0018] Preferably, it also includes a sand temperature regulating device, the feed port of the sand temperature regulating device is connected to the discharge port of the boiling dust removal device, and the discharge port of the sand temperature regulating device is connected to the feed port of the third elevator.

[0019] Preferably, a dust cover is provided on the vibrating sand-falling device.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model can remove the molding sand on the workpiece and perform preliminary crushing and screening by arranging a vibrating sand falling device, can realize the transportation and iron removal of the falling sand by arranging a vibrating conveying device and a magnetic separation drum machine, can realize the crushing and screening of the waste sand by arranging a centrifugal crushing device, can realize further crushing and grinding and shaping of the waste sand by arranging a grinding and shaping device, can realize adsorption treatment of dust in the waste sand by arranging a boiling dust removal device, and can realize the storage of the finished molding sand by arranging a finished product warehouse; through the above structure, compared with the prior art, the utility model is convenient for controlling the particle size and shape of the waste sand, and the dust can be treated during the waste sand regeneration process.

[0022] 2. Double screening is achieved by setting the first filter, the second filter and the exciting motor. The waste sand that is not filtered by the first filter can re-enter the centrifugal crushing device through the return pipe for crushing, and the waste sand that is filtered by the first filter but not filtered by the second filter enters the grinding and shaping device. The waste sand dust filtered by the second filter is transported to the dust filter bin by the dust suction fan, thereby further realizing the collection and treatment of dust in the waste sand regeneration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the overall structure flow of an embodiment of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the centrifugal crushing device according to an embodiment of the utility model.

[0025] In the figure: 1. vibration sand falling device, 11. dust cover, 2. vibration conveying device, 21. magnetic separation drum machine, 3. temporary storage bin, 31. fourth elevator, 32. first elevator, 4. centrifugal crushing device, 41. box body, 411. waste sand feeding port, 412. micro powder outlet, 413. return pipe, 414. discharge pipe, 415. air inlet pipe, 42. crushing mechanism, 421. connecting pipe, 422. primary crushing box, 423. secondary crushing box, 424. crushing motor, 43. first filter, 44. second filter, 45. vibration motor, 5. micro powder extraction mechanism, 51. dust suction fan, 52. dust filtering bin, 6. grinding and shaping device, 61. second elevator, 7. boiling dust removal device, 8. sand temperature regulating device, 81. third elevator, 9. finished product bin. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present utility model.

[0027] The technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0029] See also Figure 1 , 2 As shown, a foundry waste sand regeneration device includes a vibrating sand falling device 1, a vibrating conveying device 2, a temporary storage bin 3, a centrifugal crushing device 4, a fine powder extraction mechanism 5, a grinding and shaping device 6, a boiling dust removal device 7, a sand temperature regulating device 8 and a finished product bin 9.

[0030] Specifically, the vibration sand-falling device 1 can use an existing vibration sand-falling machine, that is, it is mainly composed of a frame and a base. The vibration part frame is supported on the machine base by two rows of springs, and two vibration motors are installed horizontally and symmetrically on the side of the sand-falling machine frame. The resultant force of the exciting force is perpendicular to the upper plane of the grid, forming a single-body structure, which promotes the separation of the sand box from the molding sand, the separation of the casting from the molding sand, and the crushing of the sand mass. In this embodiment, in order to prevent the molding sand from scattering and its dust from escaping during the vibration sand-falling process, a dust cover 11 is provided on the vibration sand-falling device 1.

[0031] The vibrating conveying device 2 can use an existing vibrating feeder. The feeding end of the vibrating conveying device 2 is arranged below the discharge port of the vibrating sand-falling device 1 and a magnetic separation drum machine 21 is arranged above the unloading end of the vibrating conveying device 2. The magnetic separation drum machine 21 is used to adsorb, collect and process metal substances such as iron in the waste sand after sand falling.

[0032] In order to temporarily store the waste sand after falling out to adjust the processing cycle of the subsequent process, the present foundry waste sand regeneration device also includes a temporary storage bin 3, the feed port of the temporary storage bin 3 is connected to the discharge port of the fourth elevator 31, and the feed port of the fourth elevator 31 is connected to the unloading end of the vibration conveying device 2. Therefore, the waste sand after iron removal enters the temporary storage bin 3 through the fourth elevator 31.

[0033] In order to transport the waste sand in the temporary storage bin 3 to the centrifugal crushing device 4, the discharge port of the temporary storage bin 3 is connected to the feed port of the first elevator 32. The feed port of the centrifugal crushing device 4 is connected to the discharge port of the first elevator 32. The centrifugal crushing device 4 includes a box body 41, a crushing mechanism 42 arranged in series longitudinally in the box body 41, a screening mechanism arranged in the box body 41 below the crushing mechanism 42, and a fine powder extraction mechanism for extracting dust in the box body 41.

[0034] A waste sand feed port 411 is provided at the top of the box body 41 and a fine powder outlet 412 is provided at the bottom thereof. The crushing mechanism 42 of the centrifugal crushing device 4 can adopt an existing structure. For example, the crushing mechanism 42 includes a primary crushing box 422 and a secondary crushing box 423 which are connected by a connecting pipe 421 and are longitudinally connected in series. The primary crushing box 422 and the secondary crushing box 423 are fixedly installed inside the box body 41. Sand throwing discs are vertically rotatably installed in the primary crushing box 422 and the secondary crushing box 423. Blades (not shown in the figure) are fixedly installed on the sand throwing disc. The crushing motor 424 drives the rotating shaft through a belt transmission structure to drive the blades to rotate.

[0035] The principle of the crushing mechanism 42 is as follows: waste sand enters the primary crushing box 422 in the box body 41 through the waste sand feed port 411. Under the action of gravity, the waste sand falls into the cylindrical area formed by the high-speed rotating sand throwing disc, collides with the blades on the sand throwing disc, and performs radial acceleration under the action of centrifugal force. Finally, it is thrown out from the end of the blade at high speed. The thrown sand and the inner liner have a strong impact, so that the inert film on the surface of the sand particles is broken and falls off. Since the waste sand bonded by water glass in the prior art generally has a large amount of micro powder during regeneration and crushing, which affects subsequent use, and in addition, the waste sand after crushing has the problem of uneven particle size, therefore, in this embodiment, a screening mechanism and a micro powder extraction mechanism are set.

[0036] Specifically, the screening mechanism includes a first filter 43 and a second filter 44 which are fixedly connected in the box body below the secondary crushing box 423 and inclined to one side. The first filter 43 and the second filter 44 are arranged up and down and the aperture of the first filter 43 is larger than the aperture of the second filter 44. A return pipe 413 and a discharge pipe 414 connected to the inner cavity of the box body 41 are welded on the box body 41 above the first filter 43 and the second filter 44, respectively. A vibration motor 45 is fixedly connected in the box body 41, and the vibration motor 45 can make the first filter 43 and the second filter 44 vibrate.

[0037] By setting the return pipe 413, the waste sand that is not filtered by the first filter 43 can re-enter the centrifugal crushing device 4 for crushing through the return pipe 413 and the return pipeline. The return pipeline can be connected to the feed port of the first elevator 32, or directly transported to the waste sand feed port 411 of the centrifugal crushing device 4 through another elevator. The waste sand filtered by the first filter 43 but not filtered by the second filter 44 enters the grinding and shaping device 6 through the discharge pipe 414, and the waste sand powder filtered by the second filter 44 is discharged from the box 41 through the powder outlet 412. The powder extraction mechanism 5 includes a dust suction fan 51 and a dust filter bin 52. The air inlet of the dust suction fan 51 is connected to the powder outlet 412, and the air outlet of the dust suction fan 51 is connected to the dust filter bin 52. The dust filter bin 52 can use an existing structure, such as a powder selection dust collector or a bag dust collector. In addition, the dust suction fan 51 can directly extract the air in the box 41 and the first elevator 32, thereby generating negative pressure inside to prevent the escape of fine powder. Alternatively, in order to facilitate the rapid extraction of fine powder in the box 41, an air inlet pipe 415 can be set on the top of the box 1, and the air inlet pipe 415 connects the outside and the inner cavity of the box 1.

[0038] In order to further grind, crush and shape the crushed waste sand particles, the feed port of the grinding and shaping device 6 is connected to the discharge port of the second elevator 61, and the feed port of the second elevator 61 is connected to the discharge pipe 414 of the centrifugal crushing device 4. The grinding and shaping device 6 can use an existing grinding machine, and its working principle is that the motor drives the moving disk to rotate and makes the waste sand on the moving disk contact with the fixed disk, and the moving disk and the fixed disk rotate relative to each other, thereby realizing the grinding of the waste sand.

[0039] Since fine powder will still be produced after grinding the waste sand, in this embodiment, a boiling dust removal device 7 is further provided, and the feed port of the boiling dust removal device 7 is connected with the discharge port of the grinding and shaping device 6. The boiling dust removal device 7 can select an existing boiling dust collector, that is, by introducing high-temperature and high-pressure gas into the boiling dust collector, the waste sand is boiled, and the fine powder escapes and is collected by a cyclone dust collector or a bag dust collector.

[0040] Before storing the finished sand after the boiling dust removal device 7, the temperature of the finished sand is adjusted by the sand temperature regulating device 8, the feed port of the sand temperature regulating device 8 is connected to the discharge port of the boiling dust removal device 7, and the discharge port of the sand temperature regulating device 8 is connected to the feed port of the third elevator 81. The feed port of the finished product bin 9 is connected to the discharge port of the third elevator 81.

[0041] The working process of the embodiment of the utility model is as follows:

[0042] The vibrating sand dropping device 1 vibrates, crushes and drops the molding sand on the casting onto the vibrating conveying device 2 for forward transmission. After the iron is removed by the magnetic separation drum machine 21, the waste sand enters the temporary storage bin 3 through the fourth elevator 31; the waste sand in the temporary storage bin 3 can be quantitatively transported to the crushing mechanism 42 of the centrifugal crushing device 4 through the first elevator 32 through the gate valve and other structures. After being crushed by the crushing mechanism 42, the large particles not filtered by the first filter 43 can re-enter the centrifugal crushing device 4 for crushing, and the waste sand filtered by the first filter 43 but not filtered by the second filter 44 enters the second elevator 61 through the discharge pipe 414, and the fine powder filtered by the second filter 43 enters the dust suction fan 51 through the fine powder outlet 422 and enters the dust filter bin 52; the waste sand in the second elevator 61 enters the grinding and shaping device 6 for grinding and shaping, and then enters the boiling dust removal device 7 to remove the fine powder, and after the temperature of the finished sand is adjusted by the sand temperature adjustment device 8, it enters the finished product bin 9 for storage through the third elevator 81.

[0043] It should be noted that, in order to improve the level of automation, the controller in the prior art can be connected to and control the above-mentioned devices, and its connection method and control principle are prior art, as long as they can meet the above-mentioned working process.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundry waste sand regeneration device, characterized in that: include, Vibrating sand removal device, used to remove the molding sand on the casting; A vibrating conveying device, wherein the feeding end of the vibrating conveying device is arranged at the discharge port of the vibrating sand-falling device and a magnetic separation drum machine is arranged above the feeding end of the vibrating conveying device; A centrifugal crushing device, whose feed port is connected to the discharge port of the first elevator, and the feed port of the first elevator is connected to the discharge end of the vibrating conveying device; A grinding and shaping device, the feed port of which is connected to the discharge port of the second elevator, and the feed port of the second elevator is connected to the discharge port of the centrifugal crushing device; A boiling dust removal device, the feed inlet of which is connected to the discharge outlet of the grinding and shaping device; A finished product bin, whose feed port is connected to the discharge port of the third elevator, and the feed port of the third elevator is connected to the discharge port of the boiling dust removal device; The centrifugal crushing device comprises a box body, crushing mechanisms arranged in series in the box body, a screening mechanism arranged in the box body below the crushing mechanism, and a fine powder extraction mechanism for extracting dust in the box body to a dust filtering bin.

2. The foundry waste sand regeneration device according to claim 1, characterized in that: It also includes a temporary storage bin, the discharge port of the temporary storage bin is connected to the feed port of the first elevator, the feed port of the temporary storage bin is connected to the discharge port of the fourth elevator, and the feed port of the fourth elevator is connected to the unloading end of the vibrating conveying device.

3. The foundry waste sand regeneration device according to claim 1, characterized in that: The screening mechanism includes a first filter screen and a second filter screen which are fixedly connected and tilted in a box body, the first filter screen and the second filter screen are arranged one above the other and the aperture of the first filter screen is larger than the aperture of the second filter screen, a return pipe and a discharge pipe which are connected to the inner cavity of the box body are respectively fixedly connected to the box body above the first filter screen and the second filter screen, and an excitation motor is fixedly connected to the box body, and the excitation motor can make the first filter screen and the second filter screen vibrate.

4. The foundry waste sand regeneration device according to claim 3, characterized in that: A powder outlet is provided on the box below the second filter screen, an air inlet of the dust suction fan is connected to the powder outlet, and an air outlet of the dust suction fan is connected to the dust filter bin.

5. The foundry waste sand regeneration device according to claim 3, characterized in that: The return pipe is connected to the feed inlet of the centrifugal crushing device through the return pipeline.

6. The foundry waste sand regeneration device according to claim 1, characterized in that: It also includes a sand temperature regulating device, the feed port of the sand temperature regulating device is connected to the discharge port of the boiling dust removal device, and the discharge port of the sand temperature regulating device is connected to the feed port of the third elevator.

7. The foundry waste sand regeneration device according to claim 1, characterized in that: A dust cover is sleeved on the vibrating sand-falling device.

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