Fine screening device for casting waste sand regeneration and upgrading
By combining multi-layer screening boxes and a dust removal system, the problem of insufficient grading capacity and dust generation of existing equipment has been solved, and the fine screening and environmentally friendly treatment of foundry waste sand has been achieved.
Patent Information
- Application Number
- CN202522083327.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-28
AI Technical Summary
Existing vibrating screening equipment has limited grading capabilities when screening foundry recycled sand, making it difficult to achieve fine multi-stage screening, and it also generates dust pollution in the working environment.
It adopts a multi-layer screening box stacked structure, combined with a flexible sealing sleeve and dust removal system to achieve multi-stage screening and suppress dust flying, and remove dust by negative pressure suction.
It achieves multi-stage screening to meet the needs of products of different specifications, reduces the floor space, improves the working environment, and avoids dust.
Smart Images
Figure CN224673725U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of foundry waste sand recycling technology, and in particular relates to a fine screening device for recycling and upgrading foundry waste sand. Background Technology
[0002] The casting process generates a large amount of waste molding sand (foundry waste sand). Recycling and reusing this waste sand is a key step in reducing production costs and achieving green casting. Screening is one of the important processes in the recycling and upgrading of foundry waste sand, aiming to classify the sand into different particle size specifications to meet the particle size requirements of different castings.
[0003] Currently, commonly used vibrating screening equipment has several significant problems when used for screening foundry recycled sand: First, due to volume limitations, most screens are single-layered, with limited grading capacity, making it difficult to achieve "refined" multi-stage screening and obtain products of multiple specifications simultaneously. On the other hand, devices using multi-layered screens are bulky and occupy a large area. Second, recycled sand, especially crushed old sand, contains a large amount of fine powder, which easily generates dust during the screening process, seriously polluting the working environment and endangering the health of operators. Utility Model Content
[0004] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes a fine screening device for the regeneration and upgrading of foundry waste sand with reasonable structure, small footprint, ability to achieve multi-stage screening, effective suppression of dust, and good environmental performance.
[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0006] A fine screening device for recycling and upgrading foundry waste sand includes:
[0007] The frame is provided with a shock-absorbing elastic support on its upper end surface;
[0008] A screening assembly is mounted on the shock-absorbing elastic support. The screening assembly includes multiple stacked screening boxes and a screen inclinedly disposed within each screening box. Each screening box has an oversize discharge port on its side wall, corresponding to the downward-sloping end of the screen inside. The bottom of the lowest screening box has a conical structure and an undersize discharge port. The mesh size of the screens decreases sequentially from top to bottom.
[0009] The discharge system includes an oversize discharge hopper corresponding to each of the oversize discharge ports and located on the outer wall of the screening box, and an undersize discharge hopper corresponding to each of the undersize discharge ports and located on the bottom outer wall of the lowest screening box; both the oversize discharge hopper and the undersize discharge hopper include a hopper body and a flexible sealing sleeve detachably connected to the outlet end of the hopper body;
[0010] A vibration device, wherein the vibration device is a vibration motor mounted on the screening assembly;
[0011] The dust removal system includes a dust collection hood covering the uppermost screening box, a bag filter, and an induced draft fan; the dust collection hood is provided with a dust collection port and a feed port corresponding to the inclined end of the screen in the uppermost screening box, and the dust collection port is connected to the bag filter and the induced draft fan through a dust collection pipe.
[0012] Furthermore, each of the screening boxes has an openable and closable inspection door on its side wall.
[0013] Furthermore, the screens in adjacent screening boxes are tilted in opposite directions, and the discharge ports of the oversize material in the corresponding adjacent screening boxes are staggered.
[0014] Furthermore, each layer of the screen is provided with a discharge guide plate extending into the inner cavity of the discharge hopper of the screen material at its downward-sloping end. The discharge guide plate is a smooth arc-shaped plate with its tail end located above the inner side of the outlet end of the hopper.
[0015] Furthermore, a fixing ring is provided on the outer wall of the outlet end of the bucket body, and a groove is provided on the outer wall of the fixing ring; the upper end of the flexible sealing sleeve is sleeved on the outside of the fixing ring, and is detachably connected to the outlet end of the bucket body by means of being tied with a cable tie or fastened in the groove by a detachable buckle.
[0016] Furthermore, the flexible sealing sleeve is a canvas sleeve or a rubber sleeve.
[0017] Furthermore, each of the screen discharge hoppers is equipped with a second dust removal port, which is connected to the dust removal system via a dust removal branch pipe.
[0018] Compared with existing technologies, the fine screening device for recycling and upgrading foundry waste sand described in this utility model has the following advantages:
[0019] (1) The screening assembly in the fine screening device for recycling and upgrading foundry waste sand described in this utility model adopts a multi-layer screening box stacking method, which reduces the floor space while achieving the purpose of multi-level screening. According to production needs, the sand body can be screened into a variety of specifications such as coarse sand, medium sand, fine sand and micro powder in one go, realizing fine grading and meeting diversified production needs.
[0020] (2) The screening process of the fine screening device for recycling and upgrading foundry waste sand described in this utility model is carried out in a closed space. At the same time, a dust removal system is set up to quickly remove the generated dust through negative pressure suction. Combined with the discharge system, the discharge hoppers for the upper and lower screen materials are connected to flexible sealing sleeves at the outlet end of the hopper body, which can prevent dust from flying during discharge, greatly improve the working environment, and is more environmentally friendly.
[0021] (3) In the fine screening device for recycling and upgrading foundry waste sand described in this utility model, the screen is installed at an angle, and its end directly corresponds to the discharge port of the screen material. With the discharge guide plate that has a guiding function, the material can slide into the bucket body and fall into the flexible sealing sleeve without any obstruction under the action of vibration and gravity, without any steps or dead corners, which fundamentally avoids the problem of accumulation and blockage of the screen material at the end of the screen. Attached Figure Description
[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0023] Figure 1 This is a schematic diagram of the internal structure of the fine screening device for recycling and upgrading foundry waste sand as described in Embodiment 1 of this utility model;
[0024] Figure 2 for Figure 1 Enlarged view of point A;
[0025] Figure 3 This is a schematic diagram of the external structure of the fine screening device for recycling and upgrading foundry waste sand as described in Embodiment 1 of this utility model;
[0026] Figure 4 This is a schematic diagram of the internal structure of the fine screening device for recycling and upgrading foundry waste sand as described in Embodiment 2 of this utility model.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1-Frame, 2-Shock-absorbing elastic support, 3-Screening box, 4-Screen, 5-Oversize material discharge port, 6-Undersize material discharge port, 7-Inspection door, 8-Oversize material discharge hopper, 9-Undersize material discharge hopper, 10-Hopper body, 11-Flexible sealing sleeve, 12-Discharge guide plate, 13-Fixing ring, 14-Cable tie, 15-Vibration motor, 16-Dust hood, 17-Bag dust collector, 18-Exhaust fan, 19-Dust removal port, 20-Feed inlet, 21-Dust removal port two, 22-Dust removal branch pipe. Detailed Implementation
[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0033] Example 1
[0034] like Figures 1 to 3 As shown, a fine screening device for recycling and upgrading foundry waste sand includes a frame 1, a screening assembly, a discharge system, a vibration device, and a dust removal system.
[0035] The upper end face of the frame 1 is provided with a shock-absorbing elastic support 2;
[0036] The screening assembly is mounted on the shock-absorbing elastic support 2; the screening assembly includes three stacked screening boxes 3 and screens 4 inclined in each screening box 3; each screening box 3 has a screen discharge port 5 on its side wall corresponding to the downward inclined end of the screen 4 inside it; the bottom of the lowest screening box 3 is a conical structure and has an under-screen discharge port 6; each screening box 3 has an openable and closable inspection door 7 on its side wall; the mesh size of each screen 4 decreases sequentially from top to bottom; the inclination direction of the screens 4 in adjacent screening boxes 3 is opposite, and the corresponding screen discharge ports 5 of adjacent screening boxes 3 are staggered;
[0037] The discharge system includes an oversize discharge hopper 8 located on the outer wall of the screening box 3, corresponding to each oversize discharge port 5, and an undersize discharge hopper 9 located on the bottom outer wall of the lowest screening box 3, corresponding to each undersize discharge port 6. Both the oversize discharge hopper 8 and the undersize discharge hopper 9 include a hopper body 10 and a flexible sealing sleeve 11 detachably connected to the outlet end of the hopper body 10. Each layer of screen 4 has a discharge guide plate 12 extending into the inner cavity of the oversize discharge hopper 8 at its downward-sloping end. The discharge guide plate 12 is a smooth arc-shaped plate with its tail end located above the inner side of the outlet end of the hopper body 10. A fixing ring 13 is provided on the outer wall of the outlet end of the hopper body 10, and a groove is provided on the outer wall of the fixing ring 13. The upper end of the flexible sealing sleeve 11 is fitted on the outside of the fixing ring 13 and is detachably connected to the outlet end of the hopper body 10 by being tied in the groove with a cable tie 14. The flexible sealing sleeve 11 is a canvas sleeve.
[0038] The vibration device is a vibration motor 15 mounted on the screening assembly;
[0039] The dust removal system includes a dust collection hood 16 covering the uppermost screening box 3, a bag filter 17, and an induced draft fan 18. The dust collection hood 16 is provided with a dust collection port 19 and a feed inlet 20 corresponding to the upward-sloping end of the screen 4 in the uppermost screening box 3. The dust collection port 19 is connected to the bag filter 17 and the induced draft fan 18 through a dust collection pipe.
[0040] The working process of the fine screening device for recycling and upgrading foundry waste sand described in this embodiment is as follows:
[0041] The sand is fed into the feed inlet 20 and falls onto the first layer of screen 4; the vibrating motor 15 and the dust removal system are started; the screening box 3 vibrates under the drive of the vibrating motor 15, and the material jumps forward on the screen surface;
[0042] Coarse sand with mesh size larger than that of the first layer screen 4 slides smoothly along the screen surface through the oversize discharge port 8 of the first layer screening box 3 under the guidance of the discharge guide plate 12 into the oversize discharge hopper 8 of the first layer and is discharged (the lower end of the flexible sealing sleeve 11 is directly inserted into the receiving box or receiving bag to prevent dust from flying);
[0043] The remaining sand falls onto the second layer screen 4, and the medium sand is screened out and slides into the second layer screen discharge hopper 8 before being discharged.
[0044] Finer sand falls onto the third layer of screen 4, and the fine sand is screened out and slides into the third layer of screen discharge hopper 8;
[0045] The finest micro-powder particles pass through the third layer of screen 4 and are discharged through the undersize hopper 9.
[0046] Meanwhile, the dust raised during the screening process is drawn into the dust collection pipe through the dust collection hood 16 under negative pressure and sent to the bag filter 17.
[0047] Example 2
[0048] like Figure 4 As shown, the difference between Example 1 and Example 2 is that each screen discharge hopper 8 is provided with a dust removal port 21 on its hopper body 10. The dust removal port 21 is connected to the dust removal system through a dust removal branch pipe 22.
[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fine screening device for recycling and upgrading foundry waste sand, characterized in that, include: The frame is provided with a shock-absorbing elastic support on its upper end surface; A screening assembly is mounted on the shock-absorbing elastic support. The screening assembly includes multiple stacked screening boxes and a screen inclinedly disposed within each screening box. Each screening box has an oversize discharge port on its side wall, corresponding to the downward-sloping end of the screen inside. The bottom of the lowest screening box has a conical structure and an undersize discharge port. The mesh size of the screens decreases sequentially from top to bottom. The discharge system includes an oversize discharge hopper corresponding to each of the oversize discharge ports and located on the outer wall of the screening box, and an undersize discharge hopper corresponding to each of the undersize discharge ports and located on the bottom outer wall of the lowest screening box; both the oversize discharge hopper and the undersize discharge hopper include a hopper body and a flexible sealing sleeve detachably connected to the outlet end of the hopper body; A vibration device, wherein the vibration device is a vibration motor mounted on the screening assembly; The dust removal system includes a dust collection hood covering the uppermost screening box, a bag filter, and an induced draft fan; the dust collection hood is provided with a dust collection port and a feed port corresponding to the inclined end of the screen in the uppermost screening box, and the dust collection port is connected to the bag filter and the induced draft fan through a dust collection pipe.
2. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: Each screening box has an openable and closable inspection door on its side wall.
3. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: The screens in adjacent screening boxes are tilted in opposite directions, and the discharge ports of the oversize material in the corresponding adjacent screening boxes are staggered.
4. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: Each layer of the screen is provided with a discharge guide plate extending into the inner cavity of the discharge hopper of the screen material at its downward-sloping end. The discharge guide plate is a smooth arc-shaped plate with its tail end located above the inner side of the outlet end of the hopper.
5. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: The outer wall of the outlet end of the bucket body is provided with a fixing ring, and the outer wall of the fixing ring is provided with a groove; the upper end of the flexible sealing sleeve is sleeved on the outside of the fixing ring, and is detachably connected to the outlet end of the bucket body by means of being tied with a cable tie or fastened in the groove by a detachable buckle.
6. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: The flexible sealing sleeve is a canvas sleeve or a rubber sleeve.
7. The fine screening device for recycling and upgrading foundry waste sand according to claim 1, characterized in that: Each of the screen discharge hoppers is equipped with a second dust removal port, which is connected to the dust removal system via a dust removal branch pipe.