Sand screening machine for constructional engineering
By switching the position of the sand screening components and designing a secondary sand screening system, the problems of frequent cleaning and incomplete sand screening in existing sand screening machines have been solved, achieving automatic cleaning and efficient sand screening, and improving the service life and screening quality of the sand screening machine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUZHOU TAIDA MUNICIPAL ENG CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-17
AI Technical Summary
Existing sand screening machines require frequent screen cleaning, which makes operation cumbersome and increases costs. The screening effect is not good, and fine sand is still present in the screened gravel and impurities, resulting in incomplete screening.
Design a sand screening machine, in which the sand screening component can switch between the first and second sand screening positions. The sand impacts the screen to loosen blockages, and the elastic element buffers the blockage to reduce it. A secondary sand screening mechanism is set up for further processing of crushed stone impurities.
The automatic cleaning of the sand screening components has been achieved, extending the cleaning cycle, improving the efficiency and effectiveness of sand screening, reducing screen damage, and ensuring the integrity of sand particle size classification.
Smart Images
Figure CN224127884U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sand screening equipment technology, and in particular to a sand screening machine for construction engineering. Background Technology
[0002] In construction, sand raw materials need to be screened to classify the sand according to its particle size to meet the requirements of different projects. Screening can also remove impurities such as stones from the sand, ensuring its purity.
[0003] CN221620015U discloses a sand screening device for construction, including a support frame, on which a sand screening component and a drive component are mounted. The drive component provides the sand screening component with oscillation power. A collector is provided at the bottom of the sand screening component, and a sand box is provided below the sand screening component. A sand inlet is opened at the top of the sand box, and a deformable guide plate is provided at the top of the sand box. A sand outlet is opened on the side wall of the sand box, and the sand outlet of the collector is inside. A screen separates impurities and sand. The sand passes through the screen and enters the collector. The sand enters the sand box from the outlet along the inner wall of the collector. Impurities slide down along the screen. After the impurities slide down, the guide plate concentrates the impurities on the right side of the sand box.
[0004] In existing technology, the screens in sand screening machines need to be cleaned regularly to remove the sand stuck to the screens in order to ensure the screening effect. Currently, when using sand screening machines, the screens need to be removed frequently for cleaning and replacement, which is quite cumbersome. Setting up other cleaning mechanisms inside the sand screening machine would increase costs and take up internal space. Utility Model Content
[0005] In existing technologies, the screens in sand screening machines need to be cleaned regularly to remove the sticky sand that clogs the screens and ensure the screening effect. Currently, when using sand screening machines, the screens need to be removed frequently for cleaning and replacement, which is quite cumbersome. Setting up other cleaning mechanisms inside the sand screening machine would increase costs and take up internal space. In addition, the existing sand and gravel have a large impact on the screens, which can easily damage the screens, and the screening effect is not good. Some fine sand will still be present in the screened gravel and impurities, and the screening is incomplete.
[0006] In view of this, the present invention aims to provide a sand screening machine for construction engineering. In the present invention, the sand screening machine includes a support frame and a sand screening bin installed on the support frame; the top of the sand screening bin is provided with a feed inlet, and the side of the bottom end is provided with a crushed stone discharge outlet, and a feed hopper is provided at the feed inlet; a collection bin is provided inside the sand screening bin, and the bottom end of the collection bin extends out of the sand screening bin and has a fine sand discharge outlet.
[0007] The sand screening bin is equipped with a sand screening component, the two ends of which abut against the discharge end of the feed hopper and the feed end of the collection bin, respectively. The sand screening component is rotatably disposed in the sand screening bin, forming a first sand screening position and a second sand screening position within the sand screening bin. The sand screening component has a first sand screening surface and a second sand screening surface. In the first sand screening position, the first sand screening surface of the sand screening component faces upward; in the second sand screening position, the second sand screening surface of the sand screening component faces upward; the sand screening component switches between the first sand screening position and the second sand screening position.
[0008] Furthermore, the top of the feed hopper is provided with a support part, and the bottom is provided with a limiting part; the feed hopper is supported in the sand screening bin through the support part, and the limiting part is provided at the discharge end of the feed hopper, and the limiting part abuts against one end of the sand screening assembly.
[0009] Furthermore, the sand screening chamber is equipped with a driving component for driving the sand screening assembly to rotate. The driving component includes a drive motor and a rotating shaft controlled by the drive motor to rotate. The rotating shaft is fixedly installed in the middle of the sand screening assembly.
[0010] Furthermore, the sand screening assembly includes a first mounting frame, a second mounting frame, a first screen plate, and a second screen plate; the first screen plate and the second screen plate are located between the first mounting frame and the second mounting frame, and the first mounting frame and the second mounting frame are connected by screws to clamp and fix the first screen plate and the second screen plate.
[0011] The first sand screening surface is disposed on the first screen plate, and the second sand screening surface is disposed on the second screen plate; the screen apertures of the first screen plate and the second screen plate are the same, and a plurality of elastic elements are disposed between the first screen plate and the second screen plate.
[0012] Furthermore, the elastic element includes a first limiting sleeve, a second limiting sleeve, and a spring; one end of the first limiting sleeve abuts against the first sieve plate, and the other end is inserted into the second limiting sleeve and slidably connected to the second limiting sleeve; one end of the second limiting sleeve abuts against the second sieve plate; the spring is sleeved outside the first limiting sleeve, and one end of the spring abuts against the second limiting sleeve.
[0013] Furthermore, the support frame is also equipped with an elevator and a secondary sand screening mechanism. The sand screening bin and the secondary sand screening mechanism are both located at the upper end of the elevator, and the crushed stone outlet feeds material to the secondary sand screening mechanism.
[0014] Furthermore, the secondary sand screening mechanism includes a rotating cylinder rotatably mounted on the support frame and a rotating motor that drives the rotating cylinder to rotate; the rotating cylinder is located at the upper end of the elevator, and screen holes are evenly opened on the rotating cylinder; the rotating cylinder is inclined, and the crushed stone discharge port is inserted into the interior of the rotating cylinder from one end of the rotating cylinder.
[0015] The sand screening machine for construction engineering disclosed in this utility model, through the setting of a sand screening bin, a collection bin, and a sand screening component, and the sand screening component being set to be rotatable, allows the sand screening component to switch between a first sand screening position and a second sand screening position to perform sand screening work, that is, to realize the intermittent reverse sand screening work of the sand screening component. When sand is fed, it relies on the impact of sand on the surface of the screen to loosen the gravel and sand particles blocking the screen holes, causing the gravel to fall off and the sand to loosen. Repeatedly switching the working position can significantly reduce the phenomenon of clogging of the sand screening component, and achieve a certain degree of automatic cleaning, eliminating the need to frequently remove the screen for cleaning and extending the cleaning cycle.
[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0017] 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:
[0018] Figure 1 This is a structural schematic diagram of one embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of the sand screening component at the first sand screening position in one embodiment of the present invention;
[0020] Figure 3 This is a schematic diagram of the sand screening component at the second sand screening position in one embodiment of the present invention;
[0021] Figure 4 This is a schematic diagram of the feed hopper in one embodiment of the present invention;
[0022] Figure 5 This is a schematic diagram of the structure of a sand screening component in one embodiment of the present invention;
[0023] Figure 6 This is an exploded view of a sand screening component in one embodiment of the present invention;
[0024] Figure 7 This is a schematic diagram of the elastic element in one embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 1. Support frame; 2. Sand screening bin; 21. Feed inlet; 22. Crushed stone outlet; 3. Collection bin; 31. Fine sand outlet; 4. Sand screening assembly; 41. First mounting frame; 42. Second mounting frame; 43. First screen plate; 44. Second screen plate; 45. Elastic element; 451. First limiting sleeve; 452. Second limiting sleeve; 453. Spring; 5. Rotating shaft; 6. Feed hopper; 61. Erection part; 62. Limiting part; 7. Elevator; 8. Rotating cylinder. Detailed Implementation
[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices. "Fixed" or "fixed connection" generally refers to common mechanical connection methods, such as threaded connections, welding, or bonding.
[0030] In existing technologies, the screens in sand screening machines need to be cleaned regularly to remove the sticky sand that clogs the screens and ensure the screening effect. Currently, when using sand screening machines, the screens need to be removed frequently for cleaning and replacement, which is quite cumbersome. Setting up other cleaning mechanisms inside the sand screening machine would increase costs and take up internal space. In addition, the existing sand and gravel have a large impact on the screens, which can easily damage the screens, and the screening effect is not good. Some fine sand will still be present in the screened gravel and impurities, and the screening is incomplete.
[0031] Example 1
[0032] This utility model provides a sand screening machine for construction engineering, such as... Figure 1 As shown, in this embodiment, the sand screening machine includes a support frame 1 and a screening bin 2. The screening bin 2 is fixedly mounted on the support frame 1. The top opening of the screening bin 2 forms a feed inlet 21 for sand raw materials to enter. A feed hopper 6 is installed at the feed inlet 21, and sand is fed into the feed hopper 6 for centralized feeding. The side opening at the bottom of the screening bin 2 has a crushed stone discharge outlet 22 for the crushed stone and impurities that have undergone the screening process to be discharged. The bottom of the screening bin 2 is inclined so that the sand and gravel in the screening bin 2 can be smoothly discharged from the crushed stone discharge outlet 22. A collection bin 3 is fixed at the center of the sand bin 2. The top opening of the collection bin 3 allows fine sand after screening to enter and be collected. The bottom opening of the collection bin 3 forms a fine sand outlet 31 for the fine sand to be discharged in a concentrated manner. The bottom of the collection bin 3 extends out of the screening bin 2 from the bottom of the screening bin 2. The fine sand outlet 31 is located at the lower end of the screening bin 2, so that the crushed stone outlet 22 and the fine sand outlet 31 can discharge materials independently. Crushed stone channels are formed on both sides of the bottom of the collection bin 3 so that the sand and gravel on the side away from the crushed stone outlet 22 can be discharged smoothly from the crushed stone outlet 22.
[0033] The sand screening operation of this utility model is mainly carried out by the sand screening component 4, such as... Figure 2 As shown, the sand screening component 4 is installed inside the sand screening bin 2. The sand screening component 4 has a plate-like structure, with its two ends abutting against the discharge end of the feed hopper 6 and the feed end of the collection bin 3, respectively. Its side contacts the side of the sand screening bin 2 to prevent sand from passing through the gaps. The sand screening component 4 includes at least one screen plate. The sand screening component 4 is controlled by a drive component to rotate at a certain angle inside the sand screening bin 2. The sand screening component 4 rotates inside the sand screening bin 2 to form a first sand screening position and a second sand screening position. The second sand screening position is formed by rotating the first screen plate 43 of the sand screening component 4. In this embodiment, the rotation angle is 110 degrees. The front and back sides of the sand screening component 4 are the first sand screening surface and the second sand screening surface, respectively. In the first sand screening position, the first sand screening surface of the sand screening component 4 faces upwards for sand screening. In the second sand screening position, the second sand screening surface of the sand screening component 4 faces upwards for sand screening.
[0034] Specifically, during sand screening, the sand screening component 4 switches between the first and second screening positions. In this embodiment, the switching interval is once every half hour, but this can be adjusted according to actual usage. Figure 2 and Figure 3The diagrams shown are the usage status diagrams of the sand screening component 4 at the first and second sand screening positions, respectively. It can be seen that the sand screening component 4 is in an inclined state regardless of whether it is at the first or second sand screening position, and can perform stable sand screening work. After the fine sand enters the collection bin 3 through the sand screening component 4, it is discharged from the fine sand outlet 31, and the crushed stone rolls off the sand screening component 4 to the bottom of the sand screening bin 2 and is discharged from the crushed stone outlet 22.
[0035] This invention, through the arrangement of a sand screening bin 2, a collection bin 3, and a sand screening component 4, sets the sand screening component 4 to be rotatable, allowing it to switch between a first sand screening position and a second sand screening position to perform sand screening work. This achieves intermittent reverse sand screening work by the sand screening component 4. When sand is fed, the impact of sand on the surface of the screen loosens the gravel and sand particles blocking the screen holes, causing the gravel to fall off and the sand to loosen. Repeatedly switching the working position can significantly reduce the clogging of the sand screening component 4, achieving a certain degree of automatic cleaning. It eliminates the need to frequently remove the screen for cleaning, thus extending the cleaning cycle.
[0036] To facilitate the installation and maintenance of the sand screening bin 2, the feed hopper 6 is designed as a detachable structure; for example... Figure 4 As shown, the top of the feed hopper 6 is provided with a mounting part 61, and the feed hopper 6 is mounted in the sand screening bin 2 through the mounting part 61, which can be easily removed and installed; the bottom of the feed hopper 6 is provided with a limiting part 62, which is located at the discharge end of the feed hopper 6. The limiting part 62 abuts against one end of the sand screening assembly 4, which can limit the rotation of the sand screening assembly 4, limit the rotation angle of the sand screening assembly 4, and support the sand screening assembly 4 during sand screening.
[0037] The driving component, which drives the sand screening assembly 4 to rotate, is installed inside the sand screening chamber 2. The driving component includes a drive motor and a rotating shaft 5. The rotating shaft 5 is connected to the output shaft of the drive motor and is controlled to rotate by the drive motor. The rotating shaft 5 is fixedly installed in the middle of the sand screening assembly 4 so that the drive motor drives the rotating shaft 5 to rotate while driving the sand screening assembly 4 to rotate. The drive motor is connected to a reduction gearbox to drive the rotating shaft 5 to rotate, ensuring the stability of the rotation of the rotating shaft 5.
[0038] To prevent the motor from being affected by the force during sand screening, when it is necessary to control the rotation of the sand screening assembly 4, the rotating shaft 5 and the output shaft of the drive motor are connected by a coupling; when sand screening is being carried out, the connection between the drive motor and the rotating shaft 5 is disconnected, and a limit device is set to restrict the rotation of the rotating shaft 5.
[0039] Sand screening component 4 serves as a sand screening part, such as Figure 5 and Figure 6As shown, the sand screening assembly 4 is configured as a first mounting frame 41, a second mounting frame 42, a first screen plate 43, and a second screen plate 44. The first screen plate 43 and the second screen plate 44 are located between the first mounting frame 41 and the second mounting frame 42. The first mounting frame 41 and the second mounting frame 42 clamp and fix the first screen plate 43 and the second screen plate 44 from both sides. The first mounting frame 41 and the second mounting frame 42 are connected by screws. The first sand screening surface is set on the first screen plate 43, that is, the first screen plate 43 faces upward when in the first sand screening position. The second sand screening surface is set on the second screen plate 44, that is, the second screen plate 44 faces upward when in the second sand screening position. The screen hole diameters of the first screen plate 43 and the second screen plate 44 are the same, that is, the structures of the first screen plate 43 and the second screen plate 44 are completely identical.
[0040] To avoid the impact of sand and gravel on the screen plate causing damage to the screen mesh, such as Figure 6 and Figure 7 As shown, multiple elastic elements 45 are provided between the first sieve plate 43 and the second sieve plate 44 to provide a certain buffer while meeting the requirements of sand screening. The elastic element 45 includes a first limiting sleeve 451, a second limiting sleeve 452, and a spring 453. One end of the first limiting sleeve 451 abuts against the first sieve plate 43, and the other end is inserted into the second limiting sleeve 452 and slidably connected to the second limiting sleeve 452. One end of the second limiting sleeve 452 abuts against the second sieve plate 44. The spring 453 is sleeved on the outside of the first limiting sleeve 451, and one end of the spring 453 abuts against the second limiting sleeve 452, and the other end abuts against the first sieve plate 43. The hole in the first limiting sleeve 451 has the same diameter as the sieve hole of the first sieve plate 43 and is aligned and connected with the sieve hole. An elastic element 45 is provided at each sieve hole to prevent sand from entering between the first and second sieve plates 44.
[0041] Example 2
[0042] Existing sand screening machines discharge crushed stone impurities after screening, but some fine sand still remains in the screened-out crushed stone impurities; therefore, if Figure 1As shown, in this embodiment, an elevator 7 and a secondary sand screening mechanism are installed on the support frame 1. The sand screening bin 2 and the secondary sand screening mechanism are both located at the upper end of the elevator 7. The crushed stone discharge port 22 feeds material to the secondary sand screening mechanism, which performs secondary sand screening on the crushed stone impurities discharged from the crushed stone discharge port 22. The fine sand discharged from the fine sand discharge port 31 and the secondary sand screening mechanism both fall onto the elevator 7 for conveying to the next station. The secondary sand screening mechanism includes a rotating cylinder 8 rotatably mounted on the support frame 1 and a rotating motor that drives the rotating cylinder 8 to rotate. The rotating cylinder 8 has openings at both ends, and the crushed stone discharge port 22 is inserted into the rotating cylinder 8 from one end. The other end of the rotating drum 8 is connected to the crushed stone collection frame to collect the crushed stone impurities after sand screening. The rotating drum 8 is located at the upper end of the elevator 7, and screen holes are evenly opened on the rotating drum 8. The rotating drum 8 is inclined so that the crushed stone can roll from the crushed stone discharge port 22 into the crushed stone collection frame for collection when the rotating drum 8 rotates. The drive motor drives the rotating drum 8 to rotate, causing the crushed stone inside to rotate. The fine sand adsorbed in the gaps between the crushed stone falls through the screen holes to the elevator 7 for conveying. The secondary sand screening after the crushed stone is discharged can collect the remaining fine sand in the gaps between the crushed stone and convey it together with the fine sand discharged from the fine sand discharge port 31.
[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A sand screening machine for construction work, characterized in that, Includes a support frame (1) and a sand screening bin (2) installed on the support frame (1); The top of the sand screening bin (2) is provided with a feed inlet (21), and the side of the bottom is provided with a crushed stone discharge outlet (22). A feed hopper (6) is installed at the feed inlet (21). The inside of the sand screening bin (2) is provided with a collection bin (3). The bottom of the collection bin (3) extends out of the sand screening bin (2) and is provided with a fine sand discharge outlet (31). The sand screening bin (2) is equipped with a sand screening component (4), and the two ends of the sand screening component (4) abut against the discharge end of the feed hopper (6) and the feed end of the collection bin (3), respectively. The sand screening component (4) is rotatably arranged in the sand screening bin (2). The sand screening component (4) forms a first sand screening position and a second sand screening position in the sand screening bin (2). The sand screening component (4) has a first sand screening surface and a second sand screening surface. In the first sand screening position, the first sand screening surface of the sand screening component (4) faces upward. In the second sand screening position, the second sand screening surface of the sand screening component (4) faces upward. The sand screening component (4) switches between the first sand screening position and the second sand screening position.
2. The sand screening machine for construction work according to claim 1, characterized by The top of the feed hopper (6) is provided with a support part (61) and the bottom is provided with a limiting part (62); the feed hopper (6) is supported in the sand screening bin (2) through the support part (61), and the limiting part (62) is provided at the discharge end of the feed hopper (6), and the limiting part (62) abuts against one end of the sand screening assembly (4).
3. The sand screening machine for construction work according to claim 1, characterized by The sand screening chamber (2) is provided with a driving component that drives the sand screening assembly (4) to rotate. The driving component includes a drive motor and a rotating shaft (5) controlled by the drive motor to rotate. The rotating shaft (5) is fixedly installed in the middle of the sand screening assembly (4).
4. Sand screening machine for construction work according to any one of claims 1-3, characterized in that The sand screening assembly (4) includes a first mounting frame (41), a second mounting frame (42), a first screen plate (43), and a second screen plate (44); the first screen plate (43) and the second screen plate (44) are located between the first mounting frame (41) and the second mounting frame (42), and the first mounting frame (41) and the second mounting frame (42) are connected by screws to clamp and fix the first screen plate (43) and the second screen plate (44); The first sand screening surface is disposed on the first screen plate (43), and the second sand screening surface is disposed on the second screen plate (44); the screen holes of the first screen plate (43) and the second screen plate (44) have the same diameter, and a plurality of elastic elements (45) are disposed between the first screen plate (43) and the second screen plate (44).
5. A sand screening machine for construction work as claimed in claim 4 wherein, The elastic element (45) includes a first limiting sleeve (451), a second limiting sleeve (452), and a spring (453); one end of the first limiting sleeve (451) abuts against the first sieve plate (43), and the other end is inserted into the second limiting sleeve (452) and slidably connected to the second limiting sleeve (452); one end of the second limiting sleeve (452) abuts against the second sieve plate (44); the spring (453) is sleeved on the outside of the first limiting sleeve (451), and one end of the spring (453) abuts against the second limiting sleeve (452).
6. A sand screening machine for construction work according to any one of claims 1 to 3, characterised in that, The support frame (1) is also equipped with an elevator (7) and a secondary sand screening mechanism. The sand screening bin (2) and the secondary sand screening mechanism are both located at the upper end of the elevator (7). The crushed stone discharge port (22) feeds material to the secondary sand screening mechanism.
7. A sand screening machine for construction work as claimed in claim 6 wherein, The secondary sand screening mechanism includes a rotating cylinder (8) rotatably mounted on the support frame (1) and a rotating motor that drives the rotating cylinder (8) to rotate; the rotating cylinder (8) is located at the upper end of the elevator (7), and screen holes are evenly opened on the rotating cylinder (8); the rotating cylinder (8) is inclined, and the crushed stone discharge port (22) is inserted into the interior of the rotating cylinder (8) from one end of the rotating cylinder (8).