Casting facing sand screening device
By designing a casting surface sand screening device with a cylindrical outer shell and an assembled screening frame, the dust problem during screening is solved, and sealed screening and rapid discharge are achieved, making it suitable for coarse screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-06
AI Technical Summary
Existing sand screening devices for foundries generate a large amount of dust during the screening process, leading to environmental pollution.
Design a casting surface sand screening device with a cylindrical shell, adopting an assembled screening frame and screen structure, with the screen holes decreasing in size from top to bottom, combined with a vibrator and spring support to achieve sealed screening.
It achieves dust-free screening, has a simple structure and low cost, is suitable for coarse screening, avoids vibration jamming, and has fast discharge.
Smart Images
Figure CN223970803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of casting sand screening technology, specifically a casting surface sand screening device. Background Technology
[0002] Foundry sand needs to be screened before use. The general sand screening device is a flat type. Flat screening has a significant problem: it produces a lot of dust. Utility Model Content
[0003] The purpose of this invention is to provide a casting surface sand screening device to solve the problem of large amounts of dust generated by the use of the flat screening device mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A casting surface sand screening device includes a housing, which is cylindrical in shape. The bottom of the housing is closed and a motor is fixedly installed thereon. Vibrators are symmetrically fixedly installed on the lower part of the housing. A base plate is fixedly installed on the rotating shaft of the motor. The lower side of the base plate is in contact with the vibrators. An assembled screening frame is fixedly installed on the upper layer of the base plate. A screen is fixedly installed in the inner ring of the assembled screening frame. The screen holes of the screen are set to decrease from top to bottom. Discharge ports are opened on the housing between the screens and between the screens and the base plate. All the discharge ports are spirally staggered.
[0006] As a further description of the above technical solution:
[0007] The assembled screening frame includes a spring tube, a lower corner plate, a spring, an upper corner plate, a circular frame, and a connecting corner plate. The spring tube is arranged around the axis of the outer shell. The lower corner plate is provided at the bottom end of the spring tube. The spring is fixedly installed inside the spring tube. The upper corner plate is fixedly installed at the top end of the spring. The connecting corner plate is integrally connected to the inner side of the circular frame. The lower corner plate, upper corner plate, and connecting corner plate have the same shape and bolt holes are opened at their outer ends. The lower corner plate at the bottom position is fixedly connected to the base plate.
[0008] As a further description of the above technical solution:
[0009] The screen has a central arc-shaped protrusion.
[0010] As a further description of the above technical solution:
[0011] The height of the compressed spring is greater than the height of the inner cavity of the spring tube.
[0012] As a further description of the above technical solution:
[0013] The bottom of the discharge port is flush with the lower side of the circular frame, the height of the circular frame is 5-7cm, and the screen is located on the upper side of the circular frame.
[0014] As a further description of the above technical solution:
[0015] The spring is a rigid spring.
[0016] Compared with the prior art, this utility model provides a casting surface sand screening device, which has the following features:
[0017] Beneficial effects:
[0018] 1. In this utility model, the structure is simple, the assembly is convenient, the manufacturing cost is low, and it can be in a sealed state during screening, so as to achieve screening without dust.
[0019] 2. In this utility model, the spring plays a supporting and self-adjusting role when the assembled screening frame vibrates, keeping the assembled screening frame in a non-planar, left-right swaying state when it vibrates up and down, thus avoiding structural jamming during vibration. This device is particularly suitable for coarse screening. Attached Figure Description
[0020] Figure 1 This is a schematic cross-sectional view of the present invention.
[0021] Figure 2 This is a schematic diagram of the frame connection structure of the assembled screening rack of this utility model;
[0022] Figure 3 This is a schematic diagram of the external structure of this utility model.
[0023] Legend:
[0024] 1. Outer shell; 2. Vibrator; 3. Motor; 4. Base plate; 5. Assembled screening frame; 501. Bourdon tube; 502. Lower corner plate; 503. Spring; 504. Upper corner plate; 505. Circular frame; 6. Screen; 7. Discharge port. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example:
[0027] Please see Figures 1-3This utility model provides a casting surface sand screening device, including a shell 1, which is cylindrical. The bottom of the shell 1 is closed and a motor 3 is fixedly installed. Vibrators 2 are symmetrically fixedly installed on the lower part of the shell 1. A base plate 4 is fixedly installed on the rotating shaft of the motor 3. The lower side of the base plate 4 is in contact with the vibrator 2. An assembled screening frame 5 is fixedly installed on the upper layer of the base plate 4. A screen 6 is fixedly installed on the inner ring of the assembled screening frame 5. The screen holes of the screen 6 are set to decrease from top to bottom. Discharge ports 7 are opened on the shell 1 at the positions between the screens 6 and between the screens 6 and the base plate 4. All discharge ports 7 are spirally staggered.
[0028] Specifically, such as Figure 1 and 2 As shown, the assembled screening frame 5 includes a spring tube 501, a lower corner plate 502, a spring 503, an upper corner plate 504, a circular frame 505, and a connecting corner plate 506. The spring tube 501 is arranged around the axis of the outer shell 1. The lower corner plate 502 is provided at the bottom end of the spring tube 501. The spring 503 is fixedly installed on the inner side of the spring tube 501. The upper corner plate 504 is fixedly installed on the top end of the spring 503. The connecting corner plate 506 is integrally connected to the inner side of the circular frame 505. The lower corner plate 502, the upper corner plate 504, and the connecting corner plate 506 have the same shape and bolt holes are opened at their outer ends. The lower corner plate 502 at the bottom position is fixedly connected to the bottom plate 4 to keep the assembled screening frame 5 in a non-planar, left-right swaying state when it vibrates up and down, so as to avoid structural jamming during vibration.
[0029] Specifically, the screen 6 has a central arc-shaped protrusion, which allows the sand to automatically slide down to the side, resulting in fast discharge.
[0030] Specifically, the height of the compressed spring 503 is greater than the height of the inner cavity of the spring tube 501, so the spring 503 will not retract completely into the spring tube 501.
[0031] Specifically, the bottom of the discharge port 7 is flush with the lower side of the circular frame 505, the height of the circular frame 505 is 5-7cm, and the screen 6 is set on the upper side of the circular frame 505. When the sand presses down, the position of the screen 6 will not affect the discharge of material from the discharge port 7.
[0032] Specifically, spring 503 is a stiff spring, which is not easily bent or deformed under pressure, and plays a good supporting role.
[0033] Working principle:
[0034] The upper corner plate 504 is bolted and fixed to the connecting corner plate 506 of the circular frame 505. The lower corner plate 502 of the upper assembled screening frame 5 is bolted and fixed to the connecting corner plate 506 of the lower assembled screening frame 5. The lower corner plate 502 of the lowest assembled screening frame 5 is fixed to the bottom plate 4. In this way, the inner frame is assembled. It should be noted that a conveying pipe is connected to the outside of the discharge port 7. A gate is installed at the connection between the conveying pipe and the discharge port 7. It is best to install an arc-shaped sealing gate that opens from the top and bottom.
[0035] Since the screen mesh 6 has a decreasing mesh size from top to bottom, after the casting sand is poured into the top of the outer shell 1, the cover on the top of the outer shell 1 is closed and the sealing gate on the outside of the discharge port 7 is closed, so that the whole device is in a sealed and dust-free state.
[0036] When vibrator 2 is working, the inner frame composed of assembled screening frame 5 vibrates and screens in layers. Spring 503 plays the role of vibration support and self-adjustment. After screening is completed, the gate at discharge port 7 is opened, motor 3 is working, vibrator 2 stops working, the entire inner frame rotates, and the sand at screen 6 is centrifugally thrown out from discharge port 7.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A foundry face sand screening device comprising a housing (1), characterised in that: The shell (1) is cylindrical, the bottom of the shell (1) is a closed bottom and a motor (3) is fixedly installed, the lower part of the shell (1) is symmetrically fixedly installed with a vibrator (2), the rotating shaft of the motor (3) is fixedly installed with a bottom plate (4), the lower side of the bottom plate (4) is in contact with the vibrator (2), the upper level of the bottom plate (4) is fixedly installed with an assembled screening frame (5), the inner ring position of the assembled screening frame (5) is fixedly installed with a screen (6), the screen holes of the screen (6) are arranged in a decreasing manner from top to bottom, the positions between the screen (6) and the bottom plate (4) of the shell (1) are provided with a discharge port (7), and all the discharge ports (7) are arranged in a spiral staggered manner.
2. A foundry face sand screening apparatus according to claim 1, characterised in that: The assembled screening frame (5) comprises a spring tube (501), a lower corner plate (502), a spring (503), an upper corner plate (504), a circular frame (505) and a connecting corner plate (506), the spring tube (501) is arranged around the axis of the shell (1), the bottom end of the spring tube (501) is provided with the lower corner plate (502), the inner side of the spring tube (501) is fixedly installed with the spring (503), the top end of the spring (503) is fixedly installed with the upper corner plate (504), the inner side of the circular frame (505) is integrally connected with the connecting corner plate (506), the lower corner plate (502), the upper corner plate (504) and the connecting corner plate (506) are the same in shape and are provided with bolted holes at the outer ends, and the lowermost position of the lower corner plate (502) is fixedly connected with the bottom plate (4).
3. A foundry face sand screening apparatus according to claim 2, characterised in that: The center of the screen (6) is provided with an arc-shaped protrusion.
4. A foundry face sand screening apparatus according to claim 2, characterised in that: The compressed height of the spring (503) is greater than the inner cavity height of the spring tube (501).
5. A foundry face sand screening apparatus according to claim 2, wherein: The bottom of the discharge port (7) is flush with the lower side of the circular frame (505), the height of the circular frame (505) is 5-7 cm, and the screen (6) is arranged at the upper side position of the circular frame (505).
6. A foundry face sand screening apparatus according to claim 2, wherein: The spring (503) is a hard spring.