A screening device for sand and gravel particle size analysis

Abstract

The utility model relates to sand and stone screening application technical field, and specifically is a kind of screening device for sand and stone grain size analysis, including base, vibrating cylinder, screening disc and upper cover, the device is by setting multiple screening zones in screening disc, and using area exchange component to transfer material, screening is carried out in each screening zone in turn, the accurate screening of sand and stone of different particle sizes can be realized.In traditional multilayer screening device, sand and stone material is usually screened on multiple screens simultaneously, sand and stone of different particle sizes can interfere with each other, resulting in insufficient screening accuracy, and in the screening process, once a layer of screen mesh fails, the entire screening process will be affected.The device adopts the screening mode of screening zone by zone in turn, and the screening process of each screening zone is relatively independent, with higher screening accuracy, and sand and stone can be classified according to particle size more accurately.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening application technology, specifically a screening device for sand and gravel particle size analysis. Background Technology

[0002] In various fields such as construction, mining, and materials science, particle size analysis of sand and gravel is a crucial task. Accurate particle size distribution data is of paramount importance for assessing material quality, optimizing production processes, and ensuring engineering safety.

[0003] Currently, most common sand and gravel particle size analysis and screening devices on the market adopt a multi-layer screen structure, using vibration to classify sand and gravel on screens of different mesh sizes. However, these traditional devices have many shortcomings in practical use, making it difficult to meet the requirements of modern industry for high precision, high efficiency, and convenience in sand and gravel particle size analysis. In traditional multi-layer screen structures, because each layer of screen works simultaneously, the sand and gravel are prone to mutual interference during the screening process. This interference leads to inaccurate particle size classification and significant errors in the screening results, failing to meet the requirements of applications with high precision in particle size analysis. In traditional devices, the screens are usually fixed within a multi-layer screen frame; once a layer of screen is damaged or clogged, replacement and maintenance are extremely cumbersome. Disassembling the entire screen frame is necessary, which is not only time-consuming and labor-intensive but may also damage other screens, increasing maintenance costs and downtime. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a screening device for sand and gravel particle size analysis.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a screening device for sand and gravel particle size analysis, including a base, a vibrating cylinder, a screening disc, and a top cover. Several supporting springs are vertically fixed to the top of the base, the vibrating cylinder is fixed to the supporting springs, a vibrating motor is installed at the bottom of the vibrating cylinder, the screening disc is installed on the vibrating cylinder, and the screening disc has several screening zones with equal arcs inside, capable of screening. The top cover is placed on top of the screening disc, and a zone-changing component for controlling the switching of screening zones for sand and gravel materials is installed on the top cover. This device, by setting multiple screening zones in the screening disc and using the zone-changing component to transfer the material, sequentially screening it in each screening zone, can achieve precise screening of sand and gravel of different particle sizes. In traditional multi-layer screening devices, sand and gravel materials are usually screened simultaneously on multiple screen surfaces. Sand and gravel of different particle sizes may interfere with each other, resulting in insufficient screening accuracy. Moreover, if one layer of screen malfunctions during the screening process, the entire screening process will be affected. This device employs a sequential screening method, with each screening zone operating independently, resulting in higher screening accuracy and more precise classification of sand and gravel according to particle size. Furthermore, a zone-changing drive motor rotates the partition plates to transfer materials, automating the screening process.

[0006] Preferably, the vibrating cylinder has a circular cylindrical structure. The inner wall of the vibrating cylinder near the top opening is threaded. A spacer ring is fixed in the middle of the outer ring of the screening disc. The outer ring of the screening disc is threaded both above and below the spacer ring. The portion of the screening disc below the spacer ring is threadedly engaged with the vibrating cylinder. The upper cover has a circular cross-section. The inner wall of the upper cover near the bottom opening is threaded. The upper cover is threadedly engaged with the portion of the screening disc above the spacer ring. This threaded installation method ensures a very stable and reliable connection between the components. When the vibrating motor drives the vibrating cylinder, the screening disc and the upper cover can work stably and collaboratively with the vibrating cylinder without loosening or displacement. Stable installation and fit are key factors in ensuring the smooth operation of the screening process. Only with stable fit between the components can the screening disc uniformly and effectively screen the sand and gravel during vibration, thereby obtaining accurate particle size analysis results. Furthermore, this installation method facilitates the assembly and disassembly of the device, making it convenient for users to inspect and maintain the device.

[0007] Preferably, the sieving mesh number of several sieving zones inside the sieving disc is determined, and the sieving mesh number of several sieving zones increases or decreases sequentially in a clockwise direction.

[0008] Preferably, each of the screening sections in the screening disc has an installation hole, and an independent screen cylinder is threaded onto each of the installation holes. A screen mesh is fixed to the top of each independent screen cylinder. The screening function of each screening section is achieved through the cooperation of the independent screen cylinder and the screen mesh. The screen mesh of each screening section is flush with the inner wall of the bottom of the screening disc. The mesh count of the screen mesh increases or decreases sequentially in a clockwise direction according to the position of the corresponding screening section.

[0009] Preferably, the zone-changing assembly includes a rotating shaft, partition plates, and a zone-changing drive motor. The rotating shaft is rotatably fitted at the center of the bottom of the upper cover. The zone-changing drive motor is vertically mounted on the top of the screening disc, and its output shaft is connected to the rotating shaft. Two partition plates are fixed to the rotating shaft in a "V" shape. The bottom of both partition plates is in contact with the inner wall of the bottom of the screening disc, and the ends of both partition plates away from the rotating shaft are also in contact with the inner wall of the screening disc. The "V"-shaped interval between the two partition plates matches the size of the screening zones within the screening disc. The rotating shaft, partition plates, and zone-changing drive motor in the zone-changing assembly are structurally well-matched with the screening disc. The rotating shaft is rotatably fitted at the center of the bottom of the upper cover. The zone-changing drive motor is vertically mounted on the top of the screening disc, and its output shaft is connected to the rotating shaft. Two partition plates are fixed to the rotating shaft in a "V" shape, with their bottoms in contact with the inner wall of the bottom of the screening disc, and the ends of both partition plates away from the rotating shaft also in contact with the inner wall of the screening disc. The "V"-shaped interval matches the size of the screening zones. This structural design allows the partition plate to accurately define the screening zones during the screening process, ensuring that sand and gravel materials are screened within the designated zones. When material needs to be transferred, the zone-changing drive motor rotates the shaft, causing the partition plate to rotate accordingly, smoothly transferring the screened sand and gravel from one zone to the next zone with a lower mesh size for continued vibratory screening.

[0010] Preferably, the top of the cover has several feeding ports arranged in an arc shape near the edge, and each feeding port corresponds to a certain number of screening sections.

[0011] The beneficial effects of this utility model are:

[0012] (1) The screening device for sand and gravel particle size analysis described in this utility model sets multiple screening zones in the screening disc and uses a zone-changing component to transfer the material, screening it sequentially in each screening zone, thereby achieving accurate screening of sand and gravel with different particle sizes. In traditional multi-layer screening devices, sand and gravel materials are usually screened on multiple screen surfaces simultaneously. Sand and gravel with different particle sizes may interfere with each other, resulting in insufficient screening accuracy. Moreover, if a screen layer malfunctions during the screening process, the entire screening process will be affected. This device adopts a sequential screening method for each screening zone, with each screening zone having a relatively independent screening process, resulting in higher screening accuracy and more accurate classification of sand and gravel according to particle size. At the same time, the material is transferred by the zone-changing drive motor driving the partition plate to rotate, realizing the automation of the screening process, greatly improving screening efficiency, saving manual operation time and effort, and enabling the analysis of sand and gravel particle size distribution to be completed more quickly, providing more timely and accurate data support for subsequent engineering applications or research.

[0013] (2) The screening device for sand and gravel particle size analysis described in this utility model has a screening function achieved by the screening sections inside the screening disc of the screening device through the cooperation of independent screen cylinders and screens. This independent screen cylinder design makes the replacement and maintenance of the screens very convenient. In actual use, the screens may wear out or become clogged due to long-term use, thus affecting the screening effect. The independent screen cylinders of this device can be disassembled separately. When the screen of a certain screening section has a problem, it is only necessary to remove the corresponding independent screen cylinder for replacement or cleaning, which greatly reduces the maintenance cost. In addition, the design of the independent screen cylinders also facilitates the storage of the screened sand and gravel. The sand and gravel in each independent screen cylinder corresponds to a specific particle size range, which facilitates the subsequent weighing and analysis of sand and gravel of different particle sizes, further improving the convenience and accuracy of sand and gravel particle size analysis and ensuring the reliability of screening analysis results.

[0014] (3) The screening device for sand and gravel particle size analysis described in this utility model has several feeding ports arranged at an equal arc near the edge of the top cover of the device. These feeding ports correspond one-to-one with several screening zones. This design allows users to flexibly select the corresponding screening mesh to start screening according to screening requirements. In actual engineering or research, the particle size analysis requirements of sand and gravel may vary depending on the application scenario. For example, in some cases, only the larger particle size of sand and gravel needs to be analyzed, while in other cases, detailed particle size distribution analysis is required starting from the smallest particle size. By setting multiple feeding ports, this device can meet these diverse screening requirements. Users can select the appropriate feeding port to feed according to the actual situation without making complex adjustments to the entire device, which improves the versatility and practicality of the device, making it better adaptable to different working scenarios and providing greater convenience for sand and gravel particle size analysis. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a screening device for particle size analysis of sand and gravel provided by this utility model.

[0017] Figure 2 This is a schematic diagram of the vibrating cylinder structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the screening disc structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the upper cover structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the area-switching component structure of this utility model.

[0021] In the diagram: 1. Base; 2. Support spring; 3. Vibrating cylinder; 301. Vibrating motor; 4. Screening disc; 401. Spacer ring; 402. Independent screen cylinder; 403. Screen mesh; 5. Top cover; 501. Feeding port; 6. Zone changing assembly; 601. Rotating shaft; 602. Divider plate; 603. Zone changing drive motor. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figures 1-5As shown, the present invention discloses a screening device for sand and gravel particle size analysis, comprising a base 1, a vibrating cylinder 3, a screening disc 4, and a top cover 5. Several supporting springs 2 are vertically fixed to the top of the base 1. The vibrating cylinder 3 is fixed to the supporting springs 2, and a vibrating motor 301 is installed at the bottom of the vibrating cylinder 3. The screening disc 4 is mounted on the vibrating cylinder 3, and has several screening zones with equal arcs inside, capable of screening. The top cover 5 covers the top of the screening disc 4, and a zone-changing component 6 for controlling the switching of screening zones for sand and gravel materials is installed on the top cover 5. This device, by setting multiple screening zones in the screening disc 4 and using the zone-changing component 6 to transfer materials, sequentially screens them in each screening zone, achieving precise screening of sand and gravel of different particle sizes. In traditional multi-layer screening devices, sand and gravel materials are usually screened simultaneously on multiple screen surfaces. Sand and gravel of different particle sizes may interfere with each other, resulting in insufficient screening accuracy. Moreover, if one layer of screen malfunctions during the screening process, the entire screening process will be affected. This device employs a sequential screening method, with each screening zone operating independently, resulting in higher screening accuracy and more precise classification of sand and gravel according to particle size. Simultaneously, the material is transferred by rotating the partition plate 602 via the zone-changing drive motor 603, automating the screening process. This significantly improves screening efficiency, saves time and effort from manual operation, and enables faster analysis of sand and gravel particle size distribution, providing more timely and accurate data support for subsequent engineering applications or research.

[0024] In one optional embodiment of this example, the vibrating cylinder 3 has a circular cylindrical structure. The inner wall of the vibrating cylinder 3 near the top opening is threaded. A spacer ring 401 is fixed in the middle of the outer ring of the screening disc 4. Threads are also present above and below the spacer ring 401 on the outer ring of the screening disc 4. The portion of the screening disc 4 below the spacer ring 401 is threadedly engaged with the vibrating cylinder 3. The upper cover 5 has a circular cross-section. The inner wall of the upper cover 5 near the bottom opening is threaded. The upper cover 5 is threadedly engaged with the portion of the screening disc 4 above the spacer ring 401. This threaded engagement installation method ensures a very stable and reliable connection between the components. When the vibrating motor 301 drives the vibrating cylinder 3 to vibrate, the screening disc 4 and the upper cover 5 can work stably and collaboratively with the vibrating cylinder 3 without loosening or displacement. Stable installation and engagement are key factors in ensuring the smooth operation of the screening process. Only when all components are stably engaged can the screening disc 4 uniformly and effectively screen the sand and gravel during vibration, thereby obtaining accurate particle size analysis results. In addition, this installation method facilitates the assembly and disassembly of the device, making it easier for users to inspect and maintain the device, further improving the ease of use and reliability of the device.

[0025] In one optional embodiment of this invention, the screening mesh size of several screening zones within the screening disc 4 is determined, and the screening mesh size of these zones increases or decreases sequentially in a clockwise direction. This arrangement provides a clear order for screening sand and gravel. Starting from the screening zone with the largest screening mesh size, the sand and gravel are screened sequentially, ensuring that they are gradually screened and classified according to particle size from smallest to largest. Simultaneously, this arrangement, through the partition plate 602 of the zone-changing component 6 and the zone-changing drive motor 603, allows for precise control of the transfer of sand and gravel between the various screening zones, achieving an automated screening process and reducing manual intervention. The sequential increase or decrease of the screening mesh size in a clockwise direction ensures that the screening mesh size of each screening zone is clear and orderly. This orderly screening mesh size setting ensures that the sand and gravel are accurately graded according to particle size in each screening zone. Starting with the smallest particle size, larger particles of sand and gravel are gradually screened out, ultimately achieving precise analysis of the particle size distribution of the sand and gravel. Compared to randomly setting the sieve mesh size, this ordered setting reduces errors in the screening process. The sieve mesh size of each screening section is fixed and arranged in a certain order, making the screening process more stable and reliable, avoiding particle size classification errors caused by chaotic sieve mesh sizes. This ordered sieve mesh size setting provides more accurate data when analyzing the particle size distribution of sand and gravel. The sand and gravel in each independent sieve cylinder 402 corresponds to a specific particle size range. By weighing and analyzing the sand and gravel in these independent sieve cylinders 402, a more accurate particle size distribution curve can be obtained, providing more reliable data support for engineering applications and scientific research.

[0026] In one optional embodiment of this example, each of the several screening sections within the screening disc 4 has mounting holes, and an independent screen cylinder 402 is threaded onto each of these mounting holes. The independent screen cylinder 402 is threaded onto the mounting holes of the screening disc 4. This installation method is not only secure and reliable but also facilitates disassembly and installation. Operators can easily screw the independent screen cylinder 402 into or out of the mounting holes without the need for complex tools or equipment, further improving the convenience of maintenance. A screen mesh 403 is fixed to the top of each independent screen cylinder 402. The screening function of each screening section is achieved through the cooperation of the independent screen cylinder 402 and the screen mesh 403. The screen mesh 403 of each screening section is flush with the inner wall of the bottom of the screening disc 4. The mesh count of the several screen meshes 403 increases or decreases sequentially in a clockwise direction according to the position of the corresponding screening section. In practical applications, the screen 403 and the independent screen cylinder 402 are detachable. The screening function of each screening section is achieved through the cooperation of the independent screen cylinder 402 and the screen 403. This design makes the replacement and maintenance of the screen 403 very convenient. When the screen 403 of a certain screening section is worn, clogged, or damaged, simply remove the corresponding independent screen cylinder 402 and replace the screen 403. This independent replacement method greatly reduces maintenance time and workload, eliminating the need to disassemble the entire screening disc 4 and improving maintenance efficiency.

[0027] In an optional embodiment of this example, the zone-changing assembly 6 includes a rotating shaft 601, partition plates 602, and a zone-changing drive motor 603. The rotating shaft 601 is rotatably fitted at the bottom center of the upper cover 5. The zone-changing drive motor 603 is vertically mounted on the top of the screening disc 4, and its output shaft is connected to the rotating shaft 601. The two partition plates 602 are fixed to the rotating shaft 601 in a "V" shape. The bottom of both partition plates 602 is in contact with the inner wall of the bottom of the screening disc 4, and the ends of both partition plates 602 away from the rotating shaft 601 are in contact with the inner wall of the screening disc 4. The "V" shaped interval between the two partition plates 602 is adapted to the size of the screening sections within the screening disc 4. The structural fit between the rotating shaft 601, partition plates 602, and zone-changing drive motor 603 in the zone-changing assembly 6 and the screening disc 4 is very ingenious. The rotating shaft 601 is rotatably fitted at the bottom center of the upper cover 5. The zone-changing drive motor 603 is vertically mounted on the top of the screening disc 4, and its output shaft is connected to the rotating shaft 601. Two partition plates 602 are fixed to the rotating shaft 601 in a "V" shape, with their bottoms fitting against the inner wall of the bottom of the screening disc 4, and the ends away from the rotating shaft 601 fitting against the inner wall of the screening disc 4. The "V" shaped intervals are adapted to the size of the screening zones. This structural design allows the partition plates 602 to accurately define the screening zones during the screening process, ensuring that sand and gravel materials are screened within the designated screening zones. When material needs to be transferred, the zone-changing drive motor 603 drives the rotating shaft 601 to rotate, and the partition plates 602 rotate accordingly, smoothly transferring the screened sand and gravel from one screening zone to the next screening zone with a lower mesh size for continued vibratory screening. The entire material transfer process is smooth and efficient, without material spillage or blockage, ensuring the continuity and accuracy of the screening process.

[0028] In one optional embodiment of this invention, the top of the cover 5 is provided with a plurality of feeding ports 501 at an equal arc near the edge, and each of the feeding ports 501 corresponds one-to-one with a plurality of screening sections. The cover 5 has multiple feeding ports 501, each corresponding to a specific screening section. Users can flexibly select the feeding port 501 corresponding to the screening mesh size according to the screening requirements, without needing complex adjustments to the device, further improving the automation and flexibility of the screening process.

[0029] In operation, firstly, the sand and gravel are fed into the screening disc 4 through the feeding port 501 of the upper cover 5. Based on particle size analysis requirements, the feeding port 501 corresponding to the screening section with the largest mesh size is selected for feeding, ensuring that the two partition plates 602 of the zone-changing component 6 limit the feeding to both sides of the screening section with the largest mesh size. Then, the vibrating motor 301 is turned on. Driven by the vibrating motor 301, the vibrating cylinder 3 vibrates under the support spring 2, and the screening disc 4 vibrates under the action of the vibrating cylinder 3, vibrating and screening the sand and gravel in the screening section. After screening for a certain period, the zone-changing drive motor 603 drives the two partition plates 602 to rotate, transferring the screened sand and gravel from the screening section to the next screening section with a lower mesh size, continuing the vibrating screening. This process is repeated continuously, starting from the screening section with the largest mesh size, screening sequentially so that the sand and gravel are screened from small to large particle size into the corresponding independent screen cylinders 402. Finally, turn off the vibration motor 301, open the top cover 5, remove the screening disc 4, remove the corresponding independent screen cylinder 402, weigh the sand and gravel in each independent screen cylinder 402, and then further analyze the particle size distribution of the sand and gravel.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A screening device for particle size analysis of sand and gravel, comprising a base (1), a vibrating cylinder (3), a screening disc (4), and a top cover (5), characterized in that: The base (1) has several support springs (2) vertically fixed on its top. The vibrating cylinder (3) is fixed on several support springs (2). A vibrating motor (301) is installed at the bottom of the vibrating cylinder (3). The screening disc (4) is installed on the vibrating cylinder (3). The screening disc (4) has several screening sections with equal arcs inside, which can realize the screening function. The top cover (5) is placed on the top of the screening disc (4). The top cover (5) is equipped with a zone switching component (6) for controlling the switching of screening sections of sand and gravel materials.

2. The screening device for particle size analysis of sand and gravel according to claim 1, characterized in that: The vibrating cylinder (3) has a circular cylindrical structure. The inner wall of the vibrating cylinder (3) near the top opening is threaded. The outer ring of the screening disc (4) is fixed with a spacer ring (401). The outer ring of the screening disc (4) is threaded above and below the spacer ring (401). The part of the screening disc (4) below the spacer ring (401) is threaded and fixed with the vibrating cylinder (3). The upper cover (5) has a circular cross-section. The inner wall of the upper cover (5) near the bottom opening is threaded. The upper cover (5) is threaded and fixed with the part of the screening disc (4) above the spacer ring (401).

3. The screening device for particle size analysis of sand and gravel according to claim 1, characterized in that: The sieving mesh number of several sieving sections inside the sieving disc (4) is determined, and the sieving mesh number of several sieving sections increases or decreases sequentially in a clockwise direction.

4. The screening device for particle size analysis of sand and gravel according to claim 3, characterized in that: The screening disc (4) has several screening sections with mounting holes, and each of the several mounting holes is threaded with an independent screen cylinder (402). Each independent screen cylinder (402) has a screen (403) fixed on top. The screening function of each screening section is achieved by the cooperation of the independent screen cylinder (402) and the screen (403). The screen (403) of each screening section is flush with the bottom inner wall of the screening disc (4). The mesh count of the several screens (403) increases or decreases sequentially in a clockwise direction according to the position of the corresponding screening section.

5. A screening device for particle size analysis of sand and gravel according to claim 4, characterized in that: The area changing component (6) includes a rotating shaft (601), partition plates (602) and an area changing drive motor (603). The rotating shaft (601) is rotatably fitted at the bottom center of the upper cover (5). The area changing drive motor (603) is vertically installed on the top of the screening disc (4). The output shaft of the area changing drive motor (603) is connected to the rotating shaft (601). The two partition plates (602) are fixed on the rotating shaft (601) in a "V" shape. The bottom of the two partition plates (602) is in contact with the bottom inner wall of the screening disc (4). The ends of the two partition plates (602) away from the rotating shaft (601) are in contact with the inner wall of the screening disc (4). The "V" shaped interval between the two partition plates (602) is adapted to the size of the screening area in the screening disc (4).

6. The screening device for particle size analysis of sand and gravel according to claim 1, characterized in that: The top cover (5) has several feeding ports (501) with equal arcs near the edge. Each feeding port (501) corresponds to a screen section.

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