A molding sand recovery and processing device

Abstract

The present invention relates to the technical field of molding sand recovery equipment. The present invention provides a molding sand recovery and processing device, which includes a frame; a drum rotatably arranged on the frame, which has an inlet and an outlet for molding sand to pass through; a cooling water spraying member arranged on the frame and located above the drum, and the cooling water spraying member is used to spray cooling water onto the outer wall of the drum; a scraping member is swingably arranged on the frame at one end, and the other end of the scraping member can swing upward and extend obliquely and abut against the outer wall of the drum to scrape the outer wall of the drum. During the rotation of the drum, the scraping member can continuously scrape the outer wall of the drum, and promptly remove the scale formed by the heat exchange of the cooling water. The scraped scale and other impurities can slide along the surface of the scraping member, thereby avoiding the scraped scale from accumulating between the scraping member and the drum, and reducing the impact of the descaling work on the operation of the drum. Through the above technical solution, the technical problem of the cooling equipment being prone to scaling and affecting the recovery and processing efficiency in the related art during the molding sand recovery is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of molding sand recovery equipment, in particular to a molding sand recovery and processing device. Background Art

[0002] In the foundry industry, molding sand is a key material for casting production, and its recycling rate directly impacts production costs and efficiency. The typical steps in molding sand recycling include removing impurities (such as metal scraps and large slag pieces), breaking up agglomerated sand, grading and screening, magnetic separation, stripping (removing residual binder film), and cooling to ensure that the sand meets the requirements for remolding. For sand with high levels of residual binder, thermal regeneration and stripping can be used. This involves heating the sand to a sufficiently high temperature to burn or decompose the residual organic binder into gas and expel it. After binder removal, the molding sand must be cooled. Common cooling equipment includes: 1. Vibrating fluidized bed cooling, but this equipment occupies a large area and produces a high dust output during operation, requiring a dust removal system. 2. Double-disc coolers, however, require the hot sand to flow between two counter-rotating discs equipped with agitating blades, resulting in significant wear on the blades and linings. Furthermore, the equipment is complex and requires high maintenance costs. 3. Vertical heat exchange coolers, in which the hot sand flows downward by gravity through a multi-layered, staggered heat exchange tube bundle (which flows with cooling water) or a grid lined with cooling water pipes. During this flow, the sand particles come into contact with the cooling surface, exchanging heat. This requires high fluidity, is prone to clogging, and is complex to maintain. Therefore, to save costs, small manufacturers often use cooling drums to cool the hot sand. Drum cooling can be either air-cooled or water-cooled. However, air cooling requires not only the introduction of cold air into the drum but also the installation of filters on the air exiting the drum to prevent it from carrying away recovered sand. This requires additional filter cleaning equipment, such as a pulse generator. Therefore, spraying cooling water on the outer wall of the drum is the preferred cooling method. This method exchanges heat between the high-temperature sand and the cooling water, utilizing the heat absorption properties of water to reduce the sand temperature. As the cooling water absorbs heat, scale easily forms on the surface of the cooling equipment. Using a jacket to pass cooling water to remove scale requires frequent machine downtime, increasing maintenance costs and severely impacting the continuity and production efficiency of sand recovery. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a molding sand recovery and processing device, which solves the technical problem in the related art that the cooling equipment is prone to scaling during the molding sand return, affecting the recovery and processing efficiency.

[0004] According to one aspect, at least one embodiment of the present invention provides a molding sand recovery and processing device for cooling molding sand, comprising:

[0005] frame;

[0006] A drum, the drum is rotatably arranged on the frame and has an inlet and an outlet for the molding sand to pass through;

[0007] a cooling water spraying member, the cooling water spraying member being arranged on the frame and located above the drum, and being used for spraying cooling water onto the outer wall of the drum;

[0008] A scraping member, one end of which is swingably arranged on the frame, and the other end of which is capable of swinging and extending upward and abutting against the outer wall of the drum to scrape the outer wall of the drum.

[0009] For example, a molding sand recovery and processing device provided in at least one embodiment of the present invention further includes a flushing liquid spraying member, which is arranged on the frame, and the outlet of the flushing liquid spraying member faces the outer wall of the drum and is located above the scraper.

[0010] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, the flushing liquid spraying member includes:

[0011] A liquid inlet pipe, the liquid inlet pipe is arranged on the frame and is connected to a plurality of liquid distribution pipes arranged at intervals;

[0012] A liquid outlet box, the bottom of which is connected to the multiple liquid distribution tubes, and the top of which extends upward and obliquely toward the center of the drum. The top of the side wall of the liquid outlet box close to the drum is provided with the outlet, and the extension direction of the outlet is parallel to the length direction of the drum.

[0013] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, the flushing liquid spraying member further includes:

[0014] The water guide plate is arc-shaped, one end of which is arranged on the bottom wall of the outlet, and the other end extends downward toward the outer wall of the drum.

[0015] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, the liquid inlet pipe is swingably arranged on the frame, and a push rod is provided on the outer wall of the liquid inlet pipe that follows the swing of the liquid inlet pipe, and the push rod can abut against the upper end surface of the scraper so that the push rod drives the scraper to abut against the outer wall of the drum after swinging.

[0016] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, a material guide groove and a through groove are provided on the upper end surface of the scraper, and the impurities scraped by the scraper are guided by the material guide groove into the through groove, and a material collection box is provided on the frame, and the through groove leads to the opening of the material collection box.

[0017] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, the upper end of the aggregate box has an inclined limiting surface, which is used to abut against the lower end surface of the scraper to limit the swing amplitude of the scraper.

[0018] For example, in a molding sand recovery and processing device provided in at least one embodiment of the present invention, at least one partition is provided in the drum, the partition divides the drum into at least two cooling spaces, and the partition is provided with a through opening connecting two adjacent partitions.

[0019] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, there are multiple partitions, and two adjacent openings are staggeredly distributed along the radial direction of the drum.

[0020] For example, in a molding sand recovery and processing device provided by at least one embodiment of the present invention, the partition is conical, with its large end facing the feed inlet, and the through opening is formed on the side wall of the partition.

[0021] The beneficial effects of the embodiments of the present invention are:

[0022] In the present invention, the drum is rotatably arranged on a frame so that the internal molding sand can be evenly distributed during rotation, increasing the contact area between the molding sand and the inner wall of the drum, improving the heat exchange efficiency, and realizing the transportation of the molding sand from the feed port to the discharge port. The cooling water spraying part is arranged above the drum, and its spraying direction directly acts on the outer wall of the drum, transferring heat to the cooling water through the drum, thereby realizing indirect cooling of the molding sand inside the drum, and avoiding the direct contact between the cooling water and the molding sand causing the molding sand performance to be affected. During the rotation of the drum, the scraping part can continuously scrape the outer wall of the drum and promptly remove the scale formed by the heat exchange of the cooling water. The coordination between the rotation of the drum and the scraping part enables the scraping part to continue to act with the movement of the drum surface, ensuring that the scale is removed before a thick deposit is formed, maintaining the cleanliness of the outer wall of the drum, ensuring the stability of the heat exchange efficiency between the cooling water and the drum, and avoiding the reduction of the cooling effect due to the accumulation of scale. The scraper element allows for the timely removal of scale formed after cooling water spraying, reducing the chance of scale adhering to the drum's outer wall, reducing the number of downtimes required for scale removal, and ensuring the continuity of sand recovery. Because the scraper element's contact end with the drum extends upward at an angle, scale and other impurities removed slide along its surface, preventing scale from accumulating between the scraper element and the drum and minimizing the impact of scale removal on drum operation. The components are integrated into a single unit through the frame, resulting in a tightly coordinated structure that enables simultaneous sand cooling and scale removal, improving sand recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0024] Figure 1 This is a schematic top view of a molding sand recovery and processing device according to one embodiment of the present invention;

[0025] Figure 2 for Figure 1 AA cross-sectional structural diagram of the embodiment;

[0026] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0027] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0028] Figure 5 for Figure 1 A schematic diagram of the overall structure of a molding sand recovery and processing device;

[0029] Figure 6 This is a schematic structural diagram of the flushing liquid spraying component of the present invention;

[0030] Figure 7 for Figure 6 The enlarged structural diagram at C in the middle;

[0031] Figure 8 This is a schematic structural diagram of the scraping member of the present invention;

[0032] Figure 9 This is a schematic diagram of the internal structure of the drum of the present invention;

[0033] Figure 10 This is a schematic diagram of the positions of the through holes of the separators when two separators are installed in the drum.

[0034] In the figure: 100, frame; 200, roller; 201, feed port; 202, discharge port; 300, cooling water spray part; 400, scraper; 500, flushing liquid spray part; 531, outlet; 510, liquid inlet pipe; 520, liquid separation pipe; 530, liquid outlet box; 540, water guide plate; 550, push rod; 401, material guide trough; 402, through trough; 600, collection box; 601, limit surface; 700, partition; 701, through port. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0036] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0037] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0040] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0041] like Figures 1 to 8FIG. 1 shows a molding sand recovery and processing device according to one embodiment of the present invention. The molding sand recovery and processing device includes a frame 100, a drum 200, a cooling water spray element 300, and a scraper 400. The frame 100 serves as the mounting base for the entire device and provides support for the other components. The drum 200 is rotatably mounted on the frame 100, with an inlet 201 and an outlet 202 formed at each end of the drum 200. During actual installation, the rotation axis of the drum 200 is tilted within the vertical plane, with the height of one end of the inlet 201 slightly higher than the height of the other end of the outlet 202. Molding sand enters the drum 200 from the inlet 201 and moves toward the outlet 202 as the drum 200 rotates. The cooling water spray element 300 is mounted on the frame 100 and is located above the drum 200. Its spray direction is toward the outer wall of the drum 200, and it is used to spray cooling water onto the outer wall of the drum 200. A water receiving tank with an upper opening can be installed on the frame 100 and located below the drum 200. Cooling water sprayed from the cooling water spray element 300 slides down the outer wall of the drum 200 and falls into the water receiving tank for collection. The water receiving tank has a certain depth, allowing the bottom of the drum 200 to come into contact with the water collected in the water receiving tank, further increasing the heat exchange time between the cooling water and the drum 200 and improving cooling efficiency. The water in the water receiving tank can be circulated, flowing back into the heat exchange equipment for cooling, and then sprayed again through the cooling water spray element 300 to cool the drum 200. One end of the scraper 400 is hingedly pivotally mounted on the frame 100, while the other end extends upward and tilted, maintaining contact with the outer wall of the drum 200. This end can scrape the outer wall of the drum 200 as it rotates. When the scraper 400 abuts against the outer wall of the drum 200 to remove scale, since the end of the scraper 400 that contacts the drum 200 extends upward at an angle, the scraped scale and other impurities can slide along the surface of the scraper 400, thereby avoiding the scraped scale from accumulating between the scraper 400 and the drum 200, reducing the impact of the descaling work on the operation of the drum 200.

[0042] The design principle of this device is based on the combination of indirect cooling and real-time descaling. After the high-temperature molding sand enters the drum 200, it flows inside as the drum 200 rotates. The cooling water spraying part 300 sprays cooling water onto the outer wall of the drum 200. The cooling water absorbs the heat transferred from the drum 200, which reduces the temperature of the molding sand inside the drum 200. Since the cooling water acts directly on the outer wall of the drum 200, as the equipment operates, the high temperature will cause the minerals in the water to deposit on the outer wall of the drum 200 to form scale. The scraping part 400 is in continuous contact with the outer wall of the drum 200. When the drum 200 rotates, the scraping part 400 can promptly scrape off the scale that has just formed or is forming. Since the formation of scale takes time, but it is difficult to clean scale that has formed for a long time, the descaling cycle can be adjusted according to the water quality in the area. When the water quality is poor and the outer wall of the drum 200 is prone to scale formation, the scraper 400 can be operated at shorter intervals or in continuous contact with the outer wall of the drum 200 to remove scale. When the water quality is good and the outer wall of the drum 200 is less prone to scale formation, the descaling interval can be extended, with the scraper 400 periodically swung to contact the outer wall of the drum 200 to remove scale, or swung so that the scraper 400 does not contact the outer wall of the drum 200. By properly arranging the working time of the scraper 400, wear on the drum 200 can be reduced, thereby extending the practical life of the entire device.

[0043] High-temperature molding sand enters the rotating drum 200 through the inlet 201. The drum 200 rotates continuously with the molding sand and transports it to the outlet 202. At the same time, the cooling water spray element 300 is activated to spray cooling water onto the outer wall of the drum 200. The cooling water heats up after exchanging heat with the outer wall of the drum 200, and some minerals begin to deposit on the outer wall of the drum 200. At this time, the scraper element 400 can be swung so that one end of the scraper element 400 contacts the outer wall of the drum 200. As the drum 200 rotates, the scraper element 400, contacting the outer wall of the drum 200, scrapes the outer wall of the drum 200, removing the deposited scale. The cooled molding sand is finally discharged from the outlet 202, completing the cooling process. The drum 200 is rotatably mounted on the frame 100, so that the molding sand inside can be evenly distributed during rotation, increasing the contact area between the molding sand and the inner wall of the drum 200, improving heat exchange efficiency, and simultaneously transporting the molding sand from the inlet 201 to the outlet 202. The cooling water spraying member 300 is arranged above the drum 200, and its spraying direction directly acts on the outer wall of the drum 200, transferring heat to the cooling water through the drum 200, thereby achieving indirect cooling of the molding sand inside the drum 200, and avoiding the influence of the molding sand performance caused by direct contact between the cooling water and the molding sand. One end of the scraper 400 is swingably arranged on the frame 100, and the other end is in contact with the outer wall of the drum 200. During the rotation of the drum 200, the scraper 400 can continuously scrape the outer wall of the drum 200, and promptly remove the scale formed by the heat exchange of the cooling water. The rotation of the drum 200 and the coordination of the scraper 400 enable the scraper 400 to continuously act with the movement of the surface of the drum 200, ensuring that the scale is removed before a thick deposit is formed, maintaining the cleanliness of the outer wall of the drum 200, ensuring the stability of the heat exchange efficiency between the cooling water and the drum 200, and avoiding the reduction of the cooling effect due to the accumulation of scale. The scraper 400 allows for the timely removal of scale formed after cooling water spraying, reducing the chance of scale adhering to the outer wall of the drum 200, reducing the number of downtimes required for scale removal, and ensuring the continuity of sand recovery. The various components are integrated into a single unit through the frame 100, creating a tight structural fit that enables simultaneous sand cooling and scale removal, improving sand recovery efficiency.

[0044] Furthermore, to improve the efficiency of treating scale deposits on the outer wall of the drum 200, a rinse liquid sprayer 500 is provided in the sand recovery and processing device. The rinse liquid is an acidic liquid that interacts with scale. Because it is used in conjunction with the scraper 400, a soft acidic cleaning agent can be selected to reduce corrosion to the drum 200. The rinse liquid sprayer 500 is disposed on the frame 100, with its outlet 531 facing the outer wall of the drum 200 and located above the scraper 400. After the high-temperature molding sand enters the drum 200, the drum 200 rotates to transport the molding sand. The cooling water sprayer 300 sprays cooling water onto the outer wall of the drum 200, and the scraper 400 scrapes the outer wall of the drum 200. Simultaneously, the rinse liquid sprayer 500 sprays rinse liquid onto the outer wall of the drum 200, and the rinse liquid acts on the area of ​​the outer wall of the drum 200 that the scraper 400 is about to scrape. The design principle is to pre-treat the outer wall of the drum 200 with a flushing liquid before the scraper 400 removes scale, making it easier to scrape away. The process is as follows: As the molding sand moves and cools within the drum 200, the cooling water sprayer 300 and scraper 400 operate normally, while the flushing liquid sprayer 500 simultaneously sprays flushing liquid onto the corresponding area of ​​the drum 200 outer wall. The flushing liquid softens or loosens the scale, which is then scraped away by the scraper 400. The flushing liquid sprayer 500 is positioned above the scraper 400, with its outlet 531 facing the outer wall of the drum 200. This flushing liquid sprayer 500 treats the scale before the scraper 400 removes it, making it easier for the scraper 400 to remove scale and improving the descaling effect. Working in conjunction with the scraper 400, it reduces wear on the scraper 400 and extends its service life. It also prevents scale residue, ensures the cleanliness of the drum 200 outer wall, maintains cooling efficiency, further reduces downtime for cleaning, and ensures the continuity of the sand recovery process.

[0045] The rinse liquid spraying unit 500 includes a liquid inlet pipe 510, a liquid dispensing pipe 520, and a liquid outlet box 530. The liquid inlet pipe 510 is mounted on the frame 100 and connects to a plurality of spaced-apart liquid dispensing pipes 520. The outlet box 530 is connected to the multiple liquid dispensing pipes 520 at its bottom, and its top extends upward and obliquely toward the center of the drum 200. An outlet 531 is defined at the top of the sidewall near the drum 200, extending parallel to the length of the drum 200. Rinse liquid enters through the liquid inlet pipe 510, is distributed by the liquid dispensing pipes 520 to the liquid outlet box 530, and is then sprayed out of the outlet 531 onto the outer wall of the drum 200. The design principle is that the rinsing liquid enters the bottom of the liquid outlet box 530 through the liquid distribution tubes 520. The opening of the liquid outlet box 530 is located at the top of the side wall. Therefore, under the action of gravity, the liquid level in the liquid outlet box 530 is maintained at a consistent height, allowing the rinsing liquid to overflow simultaneously along the length of the outlet 531 and evenly spray onto the outer wall of the drum 200. After entering the liquid inlet pipe 510, the rinsing liquid is divided into the various liquid distribution tubes 520. The liquid distribution tubes 520 transport the rinsing liquid to the liquid outlet box 530. The rinsing liquid in the liquid outlet box 530 is sprayed out from the outlet 531, covering the outer wall area along the length of the drum 200. The multiple liquid distribution tubes 520 are connected to the liquid outlet box 530, ensuring that the rinsing liquid is evenly distributed within the liquid outlet box 530. The outlet 531 extends parallel to the length of the drum 200, ensuring that the rinsing liquid is evenly sprayed along the length of the drum 200, covering more areas of the outer wall of the drum 200 and improving the rinsing effect. The inclined design of the top of the liquid outlet box 530 brings the outlet 531 closer to the outer wall of the drum 200, thereby enhancing the effect of the flushing liquid on scale, and cooperating with the scraper 400 to more efficiently remove scale and ensure cooling efficiency.

[0046] A water deflector 540 may also be provided within the rinse liquid spray element 500. The water deflector 540 is curved, with one end positioned on the bottom wall of the outlet 531 and the other end extending downward toward the outer wall of the drum 200. After being sprayed from the outlet 531, the rinse liquid is guided by the water deflector 540 toward the outer wall of the drum 200. The curved water deflector 540 directs the flow of the rinse liquid, allowing it to act upon the outer wall of the drum 200. The rinse liquid flows out of the outlet 531 of the liquid outlet box 530, lands on the water deflector 540, and flows toward the outer wall of the drum 200 along the direction in which the curved water deflector 540 extends. The curved water deflector 540 improves the utilization rate of the rinse liquid, ensuring that the rinse liquid precisely targets the scale deposits that need to be treated. This prevents deviation of the rinse liquid spray, enhances coordination with the scraper 400, and improves the targeted and efficient scale removal process, further ensuring the cleanliness of the outer wall of the drum 200 and maintaining the cooling effect.

[0047] To coordinate the working time of the scraper 400 and to keep the rinsing liquid spraying element 500 away from the outer wall of the drum 200 when the scraper 400 is not working, a liquid inlet pipe 510 is swingably mounted on the frame 100. A push rod 550 is provided on the outer wall of the liquid inlet pipe 510. The push rod 550 swings with the liquid inlet pipe 510 and can abut against the upper end surface of the scraper 400. When the push rod 550 swings, it drives the scraper 400 to abut against the outer wall of the drum 200. When the liquid inlet pipe 510 swings, the push rod 550 moves accordingly. When the push rod 550 contacts the upper end surface of the scraper 400 and applies a force, the scraper 400 swings about the hinge point, so that its other end maintains abutment against the outer wall of the drum 200. The swinging of the liquid inlet pipe 510 drives the push rod 550, thereby adjusting the abutment state of the scraper 400 and the outer wall of the drum 200. When the scraper 400 needs to work, the liquid inlet pipe 510 swings, and the push rod 550 follows the swing and pushes the scraper 400, so that the scraper 400 is tightly abutted against the outer wall of the drum 200. The liquid inlet pipe 510 is swiveled and cooperates with the push rod 550. The swinging motion of the liquid inlet pipe 510 is used to control the swing of the scraper 400. No additional drive device is required, which simplifies the overall structure, reduces the complexity of the device, and improves the reliability of the device operation. A torsion spring is installed at the swing axis of the scraper 400. After the rinse liquid spraying element 500 swings back to its original position, the scraper 400 will no longer abut the outer wall of the drum 200 after swinging under the action of the torsion spring.

[0048] Further, refer to Figure 3 、 Figure 8 The scraper 400 has a guide trough 401 and a through-trough 402 on its upper end. Scraped impurities are guided through the guide trough 401 into the through-trough 402. A collection box 600 is provided on the frame 100, and the through-trough 402 leads to the opening of the collection box 600. Impurities such as scale scraped off by the scraper 400 fall into the guide trough 401, move along the guide trough 401 to the through-trough 402, and then enter the collection box 600 through the through-trough 402. The design principle is to guide and collect impurities through the guide trough 401 and the through-trough 402 to prevent them from scattering. After the scraper 400 scrapes impurities from the outer wall of the drum 200, the impurities enter the guide trough 401 under the action of their own gravity and the movement of the scraper 400, slide along the guide trough 401 into the through-trough 402, and finally fall into the collection box 600. The collection box 600 is connected to external pipes via a pipeline, allowing the flushing liquid flowing into the collection box 600 to be collected separately. The provision of the guide groove 401 and the through groove 402 can guide the scraped impurities to the collection box 600, preventing them from scattering to other parts of the device and affecting other parts of the device, thus reducing subsequent cleaning work. The collection box 600 collects impurities for centralized processing, maintaining a clean environment around the device and ensuring normal operation of the device.

[0049] The upper end of the material collecting box 600 has an inclined limiting surface 601, which abuts the lower end surface of the scraper 400 to limit the swing amplitude of the scraper 400. When the scraper 400 swings, its lower end surface contacts the limiting surface 601 of the material collecting box 600, and the limiting surface 601 prevents the scraper 400 from continuing to swing. The inclined angle of the limiting surface 601 is used to limit the swing range of the scraper 400, preventing the scraper 400 from swinging excessively. The limiting surface 601 can effectively limit the swing amplitude of the scraper 400, preventing the scraper 400 from losing contact with the outer wall of the drum 200 or excessively squeezing the outer wall of the drum 200 due to excessive swinging, ensuring the reasonable coordination between the scraper 400 and the outer wall of the drum 200, extending the service life of the scraper 400 and the drum 200, and maintaining the stable operation of the device.

[0050] Further, refer to Figures 9 and 10 At least one partition 700 is provided in the drum 200. The partition 700 divides the drum 200 into at least two cooling spaces. The partition 700 is provided with a through-port 701 connecting adjacent cooling spaces. After the molding sand enters the drum 200, it is cooled in the first cooling space. As the drum 200 rotates, the molding sand can enter the next cooling space through the through-port 701 to continue cooling. The partition 700 prolongs the retention time of the molding sand in the drum 200 and increases the cooling time. The molding sand enters the first cooling space of the drum 200 from the feed port 201, moves to the through-port 701 as the drum 200 rotates, enters the next cooling space, and is discharged from the discharge port 202 after passing through multiple cooling spaces in sequence. The partition 700 divides the drum 200 into multiple cooling spaces, prolongs the residence time of the molding sand in the drum 200, enables the molding sand to be fully cooled, and improves the cooling effect. The through opening 701 ensures that the molding sand can flow between the cooling spaces without affecting the transportation of the molding sand. It cooperates with the drum 200 to improve the cooling efficiency within the limited length of the drum 200 and ensure the cooling quality of the molding sand.

[0051] When the number of the separators 700 is set to be multiple, two adjacent openings 701 are staggered along the radial direction of the drum 200, such as Figure 10 As shown. After the molding sand is discharged from the opening 701 of a cooling space, it enters the next cooling space. Due to the staggered distribution of the openings 701, the molding sand needs to move a longer distance in a cooling space to reach the next opening 701. The design principle is to increase the movement path of the molding sand in each cooling space through the staggered distribution of the openings 701. The adjacent openings 701 are radially staggered, which makes the movement path of the molding sand in each cooling space more complicated, prolongs the movement time, and further improves the cooling effect. At the same time, the molding sand can contact the inner wall of the drum 200 more evenly during the movement, and the heat exchange is more sufficient. In conjunction with the separator 700, the uniformity of the molding sand cooling is improved, and the quality of the regenerated sand is guaranteed.

[0052] The separator 700 is conical, with its large end facing the feed port 201, and a through opening 701 is provided on the side wall. After the molding sand enters the drum 200, it contacts the large end of the conical separator 700 and moves toward the through opening 701 along the side wall of the separator 700. The conical structure is used to guide the molding sand to gather toward the through opening 701, ensuring that the molding sand passes through the through opening 701 smoothly. The large end of the conical separator 700 faces the feed port 201, which can guide the molding sand entering the cooling space, causing the molding sand to converge toward the through opening 701, avoiding the accumulation of molding sand in the cooling space, and ensuring the smooth transportation of the molding sand. The through opening 701 on the side wall cooperates with the conical structure to ensure that the molding sand can enter the next cooling space in an orderly manner, maintain the continuity of the cooling process, and improve the efficiency of the molding sand recovery and processing.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A molding sand recovery and processing device for cooling molding sand, characterized in that: include: rack(100); A roller (200), the roller (200) being rotatably disposed on the frame (100), and having an inlet (201) and an outlet (202) for the molding sand to pass through; a cooling water spraying member (300), the cooling water spraying member (300) being arranged on the frame (100) and located above the drum (200), the cooling water spraying member (300) being used to spray cooling water onto the outer wall of the drum (200); a scraping member (400), one end of the scraping member (400) being swingably disposed on the frame (100), and the other end of the scraping member (400) being capable of swinging and extending upward and abutting against the outer wall of the drum (200) to scrape the outer wall of the drum (200); It also includes a washing liquid spraying member (500), the washing liquid spraying member (500) being arranged on the frame (100), the outlet (531) of the washing liquid spraying member (500) facing the outer wall of the drum (200) and being located above the scraping member (400); The flushing liquid spraying member (500) comprises: a liquid inlet pipe (510), the liquid inlet pipe (510) being arranged on the frame (100), the liquid inlet pipe (510) being connected to a plurality of liquid dispensing pipes (520) arranged at intervals; a liquid outlet box (530), wherein the bottom of the liquid outlet box (530) is connected to the plurality of liquid dispensing tubes (520), the top of the liquid outlet box (530) extends obliquely upward toward the center of the drum (200), and the top of the side wall of the liquid outlet box (530) close to the drum (200) is provided with the outlet (531), and the extension direction of the outlet (531) is parallel to the length direction of the drum (200); The liquid inlet pipe (510) is swingably arranged on the frame (100), and a push rod (550) is provided on the outer wall of the liquid inlet pipe (510) so as to follow the swing of the liquid inlet pipe (510). The push rod (550) can abut against the upper end surface of the scraping member (400) so that the push rod (550) drives the scraping member (400) to abut against the outer wall of the roller (200) after the swing.

2. A molding sand recovery and processing device according to claim 1, characterized in that: The flushing liquid spraying member (500) further comprises: A water guide plate (540) is arc-shaped, with one end disposed on the bottom wall of the outlet (531) and the other end extending downward toward the outer wall of the drum (200).

3. The molding sand recovery and processing device according to claim 1, characterized in that: The scraper (400) has an upper end surface provided with a material guide groove (401) and a through groove (402). Impurities scraped by the scraper (400) are guided by the material guide groove (401) into the through groove (402). A material collecting box (600) is provided on the frame (100), and the through groove (402) leads to an opening of the material collecting box (600).

4. A molding sand recovery and processing device according to claim 3, characterized in that: The upper end of the collecting box (600) has an inclined limiting surface (601), and the limiting surface (601) is used to abut against the lower end surface of the scraping member (400) to limit the swing amplitude of the scraping member (400).

5. The molding sand recovery and processing device according to claim 1, characterized in that: At least one partition (700) is provided in the drum (200), and the partition (700) divides the drum (200) into at least two cooling spaces. The partition (700) is provided with a through opening (701) communicating with two adjacent partitions (700).

6. The molding sand recovery and processing device according to claim 5, characterized in that: There are multiple separators (700), and two adjacent openings (701) are staggeredly distributed along the radial direction of the drum (200).

7. The molding sand recovery and processing device according to claim 6, characterized in that: The separator (700) is conical, with its larger end facing the feed port (201), and the through opening (701) is formed on the side wall of the separator (700).

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