A classified bentonite screening machine

Abstract

This disclosure relates to the technical field of bentonite screening. One embodiment of this disclosure provides a graded bentonite screening machine, which includes: a housing and a support frame. The support frame is fixed to the bottom of the housing, a dust collection assembly is disposed at the top of the housing, and a multi-stage screening assembly is disposed inside the housing. The multi-stage screening assembly includes several return frames, which are fixed to the housing from top to bottom. One end of the return frame is inclined downward, and a grading discharge hopper is disposed on one side of the return frame. One end of the grading discharge hopper extends through the housing to the outside. Several buffer springs are disposed on the upper surface of the grading discharge hopper, and the upper ends of the buffer springs are connected to screen plates. The above technical solution solves the technical problem in the prior art that screening needs to be completed step by step by multiple single-specification screening devices, and the connection between each screening stage relies on manual or mechanical transfer, resulting in low overall operating efficiency.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of bentonite screening, and more specifically, to a bentonite screening machine for grading and screening. Background Technology

[0002] In the bentonite processing flow, grading and screening are key steps to improve product quality and adapt to different application scenarios. Bentonite needs to be classified into coarse, medium, and fine powders according to particle size, for use in drilling mud, cat litter, coatings, and other fields. The accuracy and efficiency of screening directly determine the added value and market competitiveness of the product. As downstream industries increase their demand for more specific bentonite specifications, the drawbacks of traditional screening methods are becoming increasingly apparent: screening requires multiple single-specification screening devices to complete the process step by step, and the connection between each screening stage relies on manual or mechanical transfer, resulting in low overall operating efficiency and severely restricting large-scale production. In traditional grading and screening processes, bentonite raw materials first need to be screened by a coarse screen to separate large particles of impurities. Then, the material after coarse screening is manually transferred to a medium screen, and after that, it is transferred again to a fine screen. This process involves multiple transfer operations, and material spillage and loss are prone to occur during the transfer. In addition, repeated loading and unloading can damage the morphology of bentonite particles, affecting product uniformity. Furthermore, the dispersed layout of multiple machines requires more factory space, and the poor coordination between the machines means that a stoppage in any part can disrupt the entire process, further reducing production stability.

[0003] Therefore, the development of a graded bentonite screening machine that can integrate multiple screening functions and eliminate intermediate transfer links has become an urgent need for the industry to improve screening efficiency and product quality. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a bentonite screening machine for graded screening, which solves the technical problem that the prior art requires multiple single-specification screening devices to complete the screening step by step, and the screening between each level relies on manual or mechanical transfer and connection, resulting in low overall operation efficiency.

[0005] According to one aspect, at least one embodiment of this disclosure provides a bentonite screening machine for grading and screening, comprising: The housing and the support frame, wherein the support frame is fixed to the bottom of the housing; A dust collection assembly is disposed on the top of the housing; A multi-stage screening assembly is disposed inside the housing; The multi-stage screening assembly includes several reflux frames, which are fixed in the housing from top to bottom. One end of each reflux frame is inclined downwards. A grading discharge hopper is provided on one side of each reflux frame. One end of the grading discharge hopper extends through the housing to the outside. Several buffer springs are provided on the upper surface of the grading discharge hopper. A screen plate is connected to the upper end of each buffer spring.

[0006] As a further technical solution, a rectangular opening is provided on the side surface of the box, and a pair of uprights are vertically fixed inside the rectangular opening. A movable plate is movably connected to the uprights, and several connecting rods are provided on the side surface of the movable plate.

[0007] As a further technical solution, one end of the connecting rod is fixedly connected to the sieve plate, one end of the sieve plate is inclined upward, the inclination angle of the sieve plate is opposite to the inclination angle of the return frame, and a second spring is fitted to both ends of the column.

[0008] As a further technical solution, a drive motor is provided on the outside of the housing, and an eccentric shaft is provided at the output end of the drive motor. A transmission rod is rotatably connected to the lower end of the surface of the movable plate through a rotating shaft, and one end of the transmission rod is rotatably connected to the eccentric shaft.

[0009] As a further technical solution, a centralized discharge hood is provided at the bottom of the box, which is connected to the bottom of the box. Both the centralized discharge hood and the grading discharge hopper are equipped with push augers.

[0010] According to another aspect, in at least one embodiment of the present invention, the dust collection assembly includes a gas collection hood connected to one side of the top of the housing, and a suction pipe is provided on the side end face of the gas collection hood.

[0011] According to another aspect, at least one embodiment of the present invention further includes a dispersive feeding assembly disposed at the top of the housing, the dispersive feeding assembly including a feeding pipe, the feeding pipe being laterally fixedly connected to the side surface of the housing.

[0012] As a further technical solution, a dispersion port is provided at the bottom of the feed pipe, the feed pipe is located above one end of the screen plate, a second auger is installed inside the feed pipe, and a feeding hopper is provided at one end of the feed pipe.

[0013] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, a multi-stage screening component solves the problem of low screening efficiency in traditional multi-device screening through an integrated grading design. Multiple screen plates work in conjunction with a return frame to achieve step-by-step particle separation. Particles of different sizes are discharged through corresponding grading hoppers, eliminating the need for manual transfer. A drive motor drives the screen plates to vibrate at high frequency, while buffer springs and a second spring ensure stable vibration and improve screening thoroughness. A push auger prevents discharge blockage, ensuring continuous particle discharge. This structure eliminates the need for multiple equipment connections, reduces material loss and space occupation, is suitable for large-scale production, and improves grading accuracy to meet the detailed specifications of bentonite required for different application scenarios, reducing the risk of production interruptions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle; Figure 5 Appendix to this disclosure Figure 3 Enlarged view of part B in the middle section; In the diagram: 1. Box body; 2. Support frame; 3. Multi-stage screening assembly; 3-1. Return rack; 3-2. Grading discharge hopper; 3-3. Buffer spring; 3-4. Screen plate; 3-5. Rectangular opening; 3-6. Column; 3-7. Movable plate; 3-8. Connecting rod; 3-9. Second spring; 3-10. Drive motor; 3-11. Eccentric shaft; 3-12. Transmission rod; 3-13. Centralized discharge hood; 3-14. Pushing auger; 4. Dust collection assembly; 4-1. Air collection hood; 4-2. Suction pipe; 5. Dispersing feeding assembly; 5-1. Feeding pipe; 5-2. Dispersing port; 5-3. Second auger; 5-4. Feeding hopper. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-5 As shown, it illustrates a graded screening bentonite sieve machine according to an embodiment of the present disclosure, comprising: The box body 1 and the bracket 2 are fixed to the bottom of the box body 1; Dust collection component 4 is disposed on the top of the housing 1; A multi-stage screening component 3 is disposed inside the housing 1; The multi-stage screening assembly 3 includes several return frames 3-1, which are fixed sequentially from top to bottom inside the housing 1. One end of each return frame 3-1 is inclined downwards. A grading discharge hopper 3-2 is provided on one side of each return frame 3-1. One end of the grading discharge hopper 3-2 extends through the housing 1 to the outside. Several buffer springs 3-3 are provided on the upper surface of the grading discharge hopper 3-2. A screen plate 3-4 is connected to the upper end of each buffer spring 3-3. A rectangular opening 3-5 is provided on the side surface of the housing 1. A pair of columns 3-6 are vertically fixed inside the rectangular opening 3-5. A movable plate 3-7 is movably connected to the columns 3-6. Several connecting rods 3-8 are provided on the side surface of the movable plate 3-7. One end of each connecting rod 3-8 is connected to the screen plate 3-4. The sieve plate 3-4 is fixedly connected, with one end of the sieve plate 3-4 tilted upwards. The tilt angle of the sieve plate 3-4 is opposite to that of the reflux frame 3-1. The two ends of the column 3-6 are fitted with second springs 3-9. The outer side of the box 1 is equipped with a drive motor 3-10. The output end of the drive motor 3-10 is equipped with an eccentric shaft 3-11. The lower end of the surface of the movable plate 3-7 is rotatably connected to a transmission rod 3-12 through a rotating shaft. One end of the transmission rod 3-12 is rotatably fitted with the eccentric shaft 3-11. The bottom of the box 1 is equipped with a centralized discharge hood 3-13, which is connected to the bottom of the box 1. Both the centralized discharge hood 3-13 and the grading discharge hopper 3-2 are equipped with push augers 3-14.

[0023] In some examples, in order to achieve precise separation and orderly discharge of bentonite particles of different sizes, and to improve screening efficiency and grading accuracy, a multi-stage screening component 3 was designed. This component includes several return racks 3-1 fixed from top to bottom in the box 1, which are horizontally layered. The structure with one end tilted downward can guide large bentonite particles that have not passed through the upper screen plate 3-4 to flow towards the grading discharge hopper 3-2, so as to avoid large particles accumulating on the screen plate 3-4 and clogging the screen holes.

[0024] The graded discharge hopper 3-2 on one side of the return rack 3-1 is connected through to the side wall of the box 1 and extends to the outside of the box 1. It can directly discharge the bentonite after screening at the corresponding level, realize the classified collection of different particle grades, and prevent the mixing of bentonite of different particle sizes. Several buffer springs 3-3 are evenly distributed on the upper surface of the grading discharge hopper 3-2, and their upper ends are fixedly connected to the screen plate 3-4. The buffer springs 3-3 provide elastic support for the screen plate 3-4 and absorb part of the impact force when the screen plate 3-4 vibrates, reducing the wear of the screen plate 3-4 caused by vibration and extending the service life of the screen plate 3-4. One end of the sieve plate 3-4 is inclined upwards, and the inclination angle is opposite to that of the return frame 3-1, forming a staggered structure. This can prolong the residence time of bentonite on the sieve plate 3-4, ensuring that small particles pass through the sieve holes fully, while large particles slide towards the return frame 3-1 along the inclination direction of the sieve plate 3-4, thus improving the thoroughness of screening. A pair of uprights 3-6 are vertically fixed inside the rectangular opening 3-5 on the side surface of the housing 1. The movable plate 3-7 is movably fitted onto the uprights 3-6 through sliding holes and can slide up and down along the uprights 3-6. Several connecting rods 3-8 on the side surface of the movable plate 3-7 are fixedly connected to the sieve plate 3-4 and can drive the sieve plate 3-4 to vibrate synchronously. The second springs 3-9 fitted at both ends of the uprights 3-6 are located on the upper and lower sides of the movable plate 3-7, which can enhance the vibration amplitude of the movable plate 3-7 and at the same time buffer the impact of vibration on the housing 1.

[0025] The output end of the drive motor 3-10 on the outside of the housing 1 is fixedly connected to the eccentric shaft 3-11. The eccentric shaft 3-11 is rotatably connected to the lower end of the surface of the movable plate 3-7 through the transmission rod 3-12. After the motor starts, the eccentric shaft 3-11 rotates and drives the transmission rod 3-12 to swing back and forth, thereby driving the movable plate 3-7 to slide up and down along the column 3-6, so that the screen plate 3-4 generates high-frequency vibration, realizing the rapid screening of bentonite particles. The centralized discharge hood 3-13 at the bottom of the box 1 is connected to the bottom of the box 1 and can collect the fine particles screened by the bottom screen plate 3-4. The centralized discharge hood 3-13 and the push auger 3-14 in the grading discharge hopper 3-2 are driven by electricity to rotate and can directionally transport the screened bentonite to the external collection device, avoiding material blockage in the discharge channel.

[0026] During operation, the drive motor 3-10 drives the screen plate 3-4 to vibrate, and the bentonite is screened on the screen plate 3-4. Large particles slide along the screen plate 3-4 to the return frame 3-1 and are discharged through the grading discharge hopper 3-2; small particles fall through the screen holes to the lower screen plate 3-4 or the centralized discharge hood 3-13, and are conveyed and collected by the pusher auger 3-14. The vibrating structure ensures efficient screening, the grading discharge achieves particle separation, and the pusher auger 3-14 ensures smooth discharge. All components work together to complete multi-stage precise screening.

[0027] like Figures 1-5 As shown in the figure, the dust collection assembly 4 in this embodiment includes a gas collection hood 4-1, which is connected to one side of the top of the housing 1, and a suction pipe 4-2 is provided on the side end face of the gas collection hood 4-1.

[0028] In some examples, in order to achieve efficient centralized discharge of dust during the screening process and avoid dust diffusion and pollution of the working environment, a dust collection component 4 is designed. The dust collection hood 4-1 on one side of the top of the component box 1 is fixed to the top of the box 1 by welding. Its coverage area covers the screening area inside the box 1, and can collect the dust generated by the collision of bentonite particles during the screening process from all directions, preventing the dust from escaping from the gaps at the top of the box 1. The suction pipe 4-2 on the side end of the dust collection hood 4-1 is connected to the inside of the dust collection hood 4-1, and one end can be connected to external negative pressure equipment (such as induced draft fan, bag dust collector) to provide continuous negative pressure power for dust suction.

[0029] During operation, the external negative pressure equipment is activated, creating a negative pressure environment inside the gas collection hood 4-1. The dust generated during the screening process is attracted by the negative pressure and flows upward from the inside of the box 1 into the gas collection hood 4-1. The dust is carried by the airflow along the suction pipe 4-2 into the external dust removal equipment. After treatment, the clean gas is discharged, and the dust is collected and treated.

[0030] This component has a simple structure and is easy to install. It can effectively reduce dust pollution during the screening process and is suitable for materials with dry bentonite and easy dust generation, providing a clean environment for screening operations.

[0031] like Figures 1-5 As shown, this embodiment also includes a dispersing feed assembly 5, which is disposed at the top of the housing 1. The dispersing feed assembly 5 includes a feed pipe 5-1, which is horizontally fixedly connected to the side surface of the housing 1. A dispersing port 5-2 is provided at the bottom of the feed pipe 5-1. The feed pipe 5-1 is located above one end of the sieve plate 3-4. A second auger 5-3 is installed inside the feed pipe 5-1. A feeding hopper 5-4 is provided at one end of the feed pipe 5-1.

[0032] In some examples, in order to achieve uniform dispersion of bentonite before it enters the screen plate 3-4, avoid material accumulation in a localized area of ​​the screen plate 3-4 leading to uneven screening, and improve screening efficiency and accuracy, a dispersion feeding component 5 is designed. The feeding pipe 5-1, which is fixed horizontally inside the side surface of the component box 1, extends to the outside of the box 1 at one end and is closed at the other end, forming a conveying channel for bentonite. Several dispersion ports 5-2 opened at the bottom of the feeding pipe 5-1 are evenly distributed along the length of the pipe, which can evenly sprinkle the bentonite in the pipe onto the screen plate 3-4 below, preventing material from concentrating in a certain area of ​​the screen plate 3-4 and ensuring that the effective screening area of ​​the screen plate 3-4 is fully utilized.

[0033] The second auger 5-3 installed in the feed pipe 5-1 is horizontally rotatably connected by a bearing. One end is fixedly connected to the output end of an electric drive unit (such as a geared motor). After the motor starts, it drives the second auger 5-3 to rotate. The auger blades are used to uniformly transport the bentonite along the length of the feed pipe 5-1, avoiding material blockage or accumulation in the pipe and ensuring that the bentonite can continuously and uniformly fall through the dispersion port 5-2.

[0034] The feeding hopper 5-4 at one end of the feeding pipe 5-1 is funnel-shaped, with the top opening larger than the bottom, which facilitates the operation of personnel or feeding equipment to feed materials into the pipe. The funnel-shaped structure can guide the bentonite into the feeding pipe 5-1 in a concentrated manner, reducing material spillage.

[0035] The feed pipe 5-1 is located above one end of the screen plate 3-4, and the dispersion port 5-2 faces the high end of the inclined screen plate 3-4, so that the bentonite is evenly sprinkled from the high end of the screen plate 3-4 and slowly slides along the inclined direction of the screen plate 3-4, extending the screening path of the material on the screen plate 3-4, ensuring that small particles of bentonite have enough time to pass through the screen holes, and improving the thoroughness of screening.

[0036] During operation, bentonite is fed into the feeding hopper 5-4. The second auger 5-3 rotates and drives the bentonite to be transported along the feed pipe 5-1. It is then evenly sprinkled onto the screen plate 3-4 through the dispersion port 5-2. The dispersed bentonite slides along the screen plate 3-4 and is screened in conjunction with the vibration of the screen plate 3-4.

[0037] The auger conveyor ensures continuous and stable feeding, and the 5-2 dispersion port design achieves uniform material distribution. This component provides a uniform material base for subsequent multi-stage screening, avoiding the impact of uneven feeding on screening results, and is suitable for the operation requirements of large-volume bentonite screening.

[0038] In actual use: Bentonite raw material is fed into the feeding hopper 5-4 of the dispersing feeding component 5. The second auger 5-3 rotates, driving the raw material to be conveyed along the feeding pipe 5-1 and evenly sprinkled onto the uppermost screen plate 3-4 through the bottom dispersing port 5-2. The drive motor 3-10 is started, and the eccentric shaft 3-11 drives the movable plate 3-7 to slide up and down along the column 3-6 through the transmission rod 3-12. The connecting rod 3-8 synchronously drives the screen plate 3-4 to vibrate. The buffer spring 3-3 and the second spring 3-9 enhance the vibration effect. The bentonite slides along the inclined direction of the screen plate 3-4. Small particles fall through the screen holes to the lower return rack 3-1, while large particles slide along the screen plate 3-4 to the grading discharge hopper 3-2 on the same side. The auger 3-14 pushes the graded particles out of the box 1. Particles that fail to pass through the upper sieve plate 3-4 are screened again by the lower sieve plate 3-4. The finest particles fall into the centralized discharge hood 3-13 at the bottom of the housing 1 and are discharged by the pusher auger 3-14. During the screening process, the dust collection component 4's suction pipe 4-2 collects and discharges dust through the air collection hood 4-1 under negative pressure, achieving multi-stage automatic screening and simultaneous dust treatment throughout the process.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A classified bentonite screening machine characterized by, include: The box body (1) and the bracket (2) are fixed to the bottom of the box body (1); Dust collection assembly (4), the dust collection assembly (4) is disposed on the top of the housing (1); A multi-stage screening component (3) is disposed inside the housing (1); The multi-stage screening component (3) includes several return frames (3-1), which are fixed in the housing (1) from top to bottom. One end of the return frame (3-1) is inclined downward. A grading discharge hopper (3-2) is provided on one side of the return frame (3-1). One end of the grading discharge hopper (3-2) extends through the housing (1) to the outside. Several buffer springs (3-3) are provided on the upper surface of the grading discharge hopper (3-2). A screen plate (3-4) is connected to the upper end of the buffer springs (3-3).

2. A classified bentonite screening machine according to claim 1, characterized in that, The box body (1) has a rectangular opening (3-5) on its side surface. A pair of columns (3-6) are vertically fixed inside the rectangular opening (3-5). A movable plate (3-7) is movably fitted onto the column (3-6). Several connecting rods (3-8) are provided on the side surface of the movable plate (3-7).

3. A classified bentonite screening machine according to claim 2, characterized in that, One end of the connecting rod (3-8) is fixedly connected to the sieve plate (3-4), one end of the sieve plate (3-4) is inclined upward, and the inclination angle of the sieve plate (3-4) is opposite to the inclination angle of the return frame (3-1). Both ends of the column (3-6) are fitted with second springs (3-9).

4. A classified bentonite screening machine according to claim 3, characterized in that, A drive motor (3-10) is provided on the outside of the housing (1). An eccentric shaft (3-11) is provided at the output end of the drive motor (3-10). A transmission rod (3-12) is rotatably connected to the lower end of the surface of the movable plate (3-7) through a rotating shaft. One end of the transmission rod (3-12) is rotatably connected to the eccentric shaft (3-11).

5. A classified bentonite screening machine according to claim 4, characterized in that, The bottom of the box (1) is provided with a centralized discharge hood (3-13), which is connected to the bottom of the box (1). Both the centralized discharge hood (3-13) and the graded discharge hopper (3-2) are equipped with push augers (3-14).

6. A classified bentonite screening machine according to claim 1, characterized in that, The dust collection assembly (4) includes a gas collection hood (4-1), which is connected to one side of the top of the housing (1), and a suction pipe (4-2) is provided on the side end face of the gas collection hood (4-1).

7. A classified bentonite screening machine as claimed in claim 1, wherein, It also includes a dispersive feeding assembly (5), which is disposed at the top of the box (1). The dispersive feeding assembly (5) includes a feeding pipe (5-1), which is laterally fixedly connected to the side surface of the box (1).

8. A classified bentonite screening machine according to claim 7, characterized in that, The bottom of the feed pipe (5-1) is provided with a dispersion port (5-2). The feed pipe (5-1) is located above one end of the screen plate (3-4). A second auger (5-3) is installed inside the feed pipe (5-1). A feeding hopper (5-4) is provided at one end of the feed pipe (5-1).

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