A fine material dry deep screening flip-flow screen

Abstract

The utility model provides a kind of fine particle level material dry method depth screening flip-flow screen, it is related to screening technical field, including shell structure, the inside of shell structure is equipped with screening structure, the junction of screening structure is equipped with cleaning mechanism, the top of shell structure is equipped with feed inlet, the feed inlet is used to transmit material to the inside of shell structure, and screening is carried out by screening structure, two cleaning sections fixed in shell inner wall are used to form bidirectional cleaning coverage, gas pump of cooperation gas conveying section is used to convey gas to spray seat through communicating piece, connecting hose, and the spray seat is displaced along fixed seat by servo motor drive screw rod, so that spray port can evenly cover entire screen surface, the design avoids the cleaning blind area of traditional fixed nozzle, high-pressure gas can be directly applied to particle adhered in screen hole and surface, effectively break the electrostatic adsorption and mechanical jamming of particle, fundamentally alleviate the hole blocking phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of screening, and in particular to a tension screen for dry depth screening of fine-particle materials. Background Technology

[0002] In industries such as mining, building materials, chemicals, and coal, dry screening of fine-grained materials (usually referring to particles or powders with a diameter ≤1mm, such as fine ore powder, cement raw materials, chemical raw material powder, and fine mud after coal washing) is one of the key production processes. Its core purpose is to achieve accurate classification of materials according to particle size, providing raw materials that meet quality requirements for subsequent grinding, purification, batching, or finished product processing, which directly affects the final product quality, production efficiency, and resource utilization.

[0003] Currently, the industry mainly relies on ordinary vibrating screens (such as circular vibrating screens and linear vibrating screens), high-frequency vibrating screens, or traditional tension screens for dry screening of fine-particle materials. The working principle of these devices is generally based on the "vibration excitation-material stratification" mechanism: the motor drives the vibrator to generate periodic vibration, causing the material on the screen surface to be thrown or slide under the action of inertial force. The material with a particle size smaller than the screen mesh size passes through the screen holes and becomes the undersize product, while the material with a particle size larger than the screen mesh size moves along the screen surface and becomes the oversize product, thus completing the screening operation.

[0004] However, in practical applications, existing screening equipment has significant technical shortcomings for dry screening of fine-grained materials. The specific problems are as follows: Fine-grained materials have a large specific surface area, strong surface adsorption, and poor flowability. During dry screening, material particles easily adhere to the screen mesh walls due to electrostatic adsorption and mechanical clogging, resulting in "pore blockage." On the one hand, dry screening, without moisture to aid material dispersion, makes it more difficult to avoid particle agglomeration and pore blockage compared to wet screening. On the other hand, existing equipment mostly relies on the screen's own vibration for "self-cleaning," but for fine screens with small apertures (such as 80 mesh or larger), the centrifugal force generated by vibration is insufficient to overcome the adsorption force between particles and the screen, and pore blockage gradually worsens over screening time. Ultimately, this leads to a continuous reduction in the effective screening area, with screening efficiency rapidly dropping from the initial 80%~90% to below 50%, and even extreme cases of "complete screen blockage," requiring frequent shutdowns for disassembly and manual cleaning, severely disrupting production continuity and increasing the labor intensity of operators.

[0005] Therefore, we propose a dry depth screening tension screen for fine-grained materials. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a dry depth screening tension screen for fine-grained materials.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A dry depth screening tension screen for fine-particle materials includes an outer shell structure, a screening structure inside the outer shell structure, a cleaning mechanism at the connection of the screening structure, and a feed inlet at the top of the outer shell structure. The feed inlet is used to transfer materials into the interior of the outer shell structure and to screen them through the screening structure; The cleaning mechanism includes an installation housing, two air supply sections, and two cleaning sections. The two cleaning sections are fixedly installed on the inner wall of the outer shell structure and are used to clean the screening structure.

[0008] As a preferred embodiment of this utility model, the outer shell structure includes a protective cover, the front of which is provided with a glass door panel, and the glass door panel is further provided with two slots.

[0009] As a preferred embodiment of this utility model, the screening structure includes a base, the top of which has two sliding grooves, the interior of which is provided with a sliding frame, and the interior of which is provided with two screens.

[0010] As a preferred embodiment of this utility model, the screening structure further includes a connecting member, which is fixedly disposed at the sliding frame. A connecting rod is hinged to the connection of the connecting member, and a rotating disk is hinged to the connection of the connecting rod. A drive motor is provided at the input end of the rotating disk.

[0011] In a preferred embodiment of this utility model, the drive motor is used to drive the rotating disk to rotate, and then drive the connecting member to move through the connecting rod. The connecting member is fixedly connected to the sliding frame, and the bottom of the sliding frame is connected to the sliding groove through a pulley.

[0012] As a preferred embodiment of this utility model, the air supply section includes a connecting member, which is disposed inside the mounting box. An air pump is provided at the connection point of the connecting member, and a connecting hose is provided at the top of the connecting member.

[0013] As a preferred embodiment of this utility model, the cleaning section includes a fixed seat, which is fixedly installed on the inner wall of the outer shell structure. The fixed seat is provided with a lead screw inside, and a servo motor is provided at the input end of the lead screw. A spray seat is provided at the connection of the lead screw, and a plurality of spray nozzles are provided at the bottom of the spray seat.

[0014] As a preferred embodiment of this utility model, the connecting hose passes through the slot and connects to the spraying seat, the air pump is used to deliver gas to the interior of the spraying seat, the spraying seat is connected to the spraying port, and then sprays the gas to the screen, and the servo motor is used to drive the lead screw to rotate, thereby driving the spraying seat to move.

[0015] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, the cleaning mechanism is optimized by using two cleaning sections fixed to the inner wall of the outer shell to form a bidirectional cleaning coverage. The air pump in the air supply section delivers gas to the spraying seat through the connecting parts and connecting hoses. The servo motor drives the lead screw to move the spraying seat along the fixed seat, so that the spray nozzle can evenly cover the entire screen surface. This design avoids the cleaning blind spots of traditional fixed nozzles. High-pressure gas can directly act on the particles attached to the screen holes and surface, effectively breaking the electrostatic adsorption and mechanical clogging of particles, fundamentally alleviating the clogging phenomenon. There is no need for frequent shutdowns for manual cleaning, which significantly reduces the labor intensity of operators and ensures the continuous and stable operation of screening. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main structure of a tension screen for dry deep screening of fine-particle materials provided by this utility model; Figure 2 A first-view schematic diagram of a partial structure of a tension screen for dry depth screening of fine-particle materials provided by this utility model; Figure 3 A second-view schematic diagram of a partial structure of a tension screen for dry depth screening of fine-particle materials provided by this utility model; Figure 4 A schematic diagram of the spray nozzle installation position of a tension screen for dry deep screening of fine-particle materials provided by this utility model.

[0017] Legend: 10. Outer shell structure; 101. Protective cover; 102. Glass door panel; 103. Groove; 20. Screening structure; 201. Base; 202. Sliding groove; 203. Sliding frame; 204. Screen; 205. Connecting part; 206. Connecting rod; 207. Rotating disk; 208. Drive motor; 30. Cleaning mechanism; 301. Mounting box; 302. Connecting part; 303. Air pump; 304. Connecting hose; 305. Sprayer seat; 306. Spray nozzle; 307. Fixed seat; 308. Lead screw; 309. Servo motor; 40. Feed inlet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Example like Figure 1-4As shown, this utility model provides a technical solution: a dry depth screening tension screen for fine-particle materials, including an outer shell structure 10, a screening structure 20 inside the outer shell structure 10, a cleaning mechanism 30 at the connection of the screening structure 20, and a feed inlet 40 at the top of the outer shell structure 10; the feed inlet 40 is used to transfer materials into the interior of the outer shell structure 10 and screen them through the screening structure 20; the cleaning mechanism 30 includes a mounting box 301, two air conveying sections, and two cleaning sections, both of which are fixedly installed in... On the inner wall of the outer shell structure 10, two cleaning sections are used to clean the screening structure 20. When dry screening of fine-grained materials is carried out, the material enters the interior of the outer shell structure 10 through the feed inlet 40. Then the screening structure 20 starts and uses its own movement to make the material move on the screen 204 to achieve the classification of materials of different particle sizes. The cleaning mechanism 30 can clean the screen 204 and other parts of the screening structure 20 through the two cleaning sections during or between screening processes to prevent material from clogging the screen 204 and ensure continuous and efficient screening.

[0023] The outer shell structure 10 includes a protective cover 101. The front of the protective cover 101 is provided with a glass door panel 102. Two slots 103 are also provided on the glass door panel 102. The protective cover 101 provides a closed working space for the entire screening device, reducing dust leakage and protecting the internal structure. The glass door panel 102 allows the operator to observe the working status of the screening structure 20 inside the shell and keep abreast of the material screening and the status of the screen 204. The two slots 103 provide passage for components such as the connecting hose 304 of the cleaning mechanism 30, while maintaining the airtightness of the shell as much as possible while ensuring the passage of components.

[0024] The screening structure 20 includes a base 201. The top of the base 201 has two sliding grooves 202. The sliding frame 203 is provided inside the two sliding grooves 202. The sliding frame 203 is provided inside the sliding frame 204. The base 201 serves as the supporting foundation of the screening structure 20. The sliding grooves 202 at its top provide a sliding track for the sliding frame 203, allowing the sliding frame 203 to reciprocate along the sliding grooves 202. The two screens 204 inside the sliding frame 203 can be set with different apertures to achieve multi-stage screening of fine-grained materials. The material moves on the screens 204 under the drive of the sliding frame 203. The material with a particle size smaller than the aperture of the screen 204 passes through the screen 204 and becomes the undersize material, while the larger particles remain on the screen 204 and continue to move to complete the classification.

[0025] The screening structure 20 also includes a connector 205, which is fixedly mounted on the sliding frame 203. A connecting rod 206 is hinged to the connection of the connector 205, and a rotating disk 207 is hinged to the connection of the connecting rod 206. A drive motor 208 is provided at the input end of the rotating disk 207. After the drive motor 208 is started, it drives the rotating disk 207 to rotate. The rotational motion of the rotating disk 207 is converted into the reciprocating oscillation of the connecting rod 206 through the hinge. The connecting rod 206 is then hinged to the connector 205, which converts the reciprocating oscillation into the linear reciprocating motion of the connector 205. This, in turn, drives the sliding frame 203, which is fixed to the connector 205, to reciprocate along the sliding groove 202 of the base 201, providing continuous motion power for the material on the screen 204, so that the material can move fully on the screen 204 to achieve screening.

[0026] The drive motor 208 drives the rotating disk 207 to rotate, which in turn drives the connecting piece 205 to move via the connecting rod 206. The connecting piece 205 is fixedly connected to the sliding frame 203. The bottom of the sliding frame 203 is connected to the sliding groove 202 via pulleys. The drive motor 208 outputs power to make the rotating disk 207 rotate. The rotating disk 207 pulls or pushes the connecting piece 205 via the connecting rod 206. Since the connecting piece 205 is fixed to the sliding frame 203, the sliding frame 203 moves together with the connecting piece 205. The pulleys at the bottom of the sliding frame 203 cooperate with the sliding groove 202 to convert sliding friction into rolling friction, which greatly reduces the movement resistance of the sliding frame 203, making it move more smoothly and efficiently along the sliding groove 202, ensuring the stable operation of the screening structure 20 and improving screening efficiency.

[0027] The gas delivery section includes a connecting component 302, which is located inside the mounting housing 301. An air pump 303 is installed at the connection point of the connecting component 302, and a connecting hose 304 is installed at the top of the connecting component 302. After the air pump 303 is started, it draws in external gas and delivers it into the connecting component 302. The connecting component 302 collects and transfers the gas, allowing the gas to be transmitted through the connecting hose 304 at its top, providing a stable gas source for the subsequent gas spraying in the cleaning section, and ensuring that the cleaning mechanism 30 has sufficient gas pressure and flow to clean the screen 204.

[0028] The cleaning section includes a fixed base 307, which is fixedly mounted on the inner wall of the outer shell structure 10. Inside the fixed base 307 is a lead screw 308. A servo motor 309 is located at the input end of the lead screw 308. A spraying seat 305 is located at the connection point of the lead screw 308. Several spray nozzles 306 are located at the bottom of the spraying seat 305. After receiving a control signal, the servo motor 309 drives the lead screw 308 to rotate. Since the spraying seat 305 and the lead screw 308 are connected by threads or other structures, the rotation of the lead screw 308... The spray seat 305 reciprocates along the fixed seat 307. The gas transported by the gas conveying section enters the interior of the spray seat 305 through the connecting hose 304, and then sprays out from several spray nozzles 306 at the bottom of the spray seat 305. The sprayed gas acts on the surface and screen holes of the screen 204 of the screening structure 20, blowing off the blocked or attached material particles to clean the screen 204. The reciprocating motion of the spray seat 305 expands the coverage of the spray nozzles 306, ensuring that all areas of the screen 204 can be cleaned.

[0029] The connecting hose 304 passes through the slot 103 and connects to the spray base 305. The air pump 303 is used to deliver gas to the interior of the spray base 305. The spray base 305 is connected to the spray nozzle 306, thereby spraying the gas onto the screen 204. The servo motor 309 is used to drive the lead screw 308 to rotate, thereby moving the spray base 305. The connecting hose 304 passes through the slot 103 on the outer glass door panel 102, connecting the connecting piece 302 of the air delivery section to the spray base 305 of the cleaning section, forming a gas transmission channel. When the air pump 303 is working, it continuously pressurizes the gas into the connecting piece. 302, and then through the connecting hose 304, the gas is sent into the spray seat 305. Since the spray seat 305 is connected to the spray nozzle 306, the gas is sprayed out from the spray nozzle 306 to clean the screen 204 below. At the same time, the servo motor 309 drives the lead screw 308 to rotate. The lead screw 308, through its cooperation with the spray seat 305, drives the spray seat 305 to move within the range of the fixed seat 307, so that the spray nozzle 306 at the bottom of the spray seat 305 cleans different positions of the screen 204 during the movement, avoiding blind spots, ensuring the overall cleanliness of the screen 204, and maintaining the high efficiency of the screening structure 20.

[0030] It should be noted that the electrical equipment and components mentioned above are all programmed and controlled using existing PLC controllers. Since these are mature technologies, they will not be described in detail here.

[0031] The working process of this dry depth screening tension screen for fine-particle materials is as follows: Feeding: The material enters the interior of the shell through the feed port 40 at the top of the shell structure 10 and falls onto the screen 204 of the screening structure 20.

[0032] Screening operation: The drive motor 208 starts, driving the rotating disk 207 to rotate; the rotating disk 207 converts the rotational motion into the reciprocating oscillation of the connecting rod 206 through the hinged connecting rod 206, which in turn drives the connecting piece 205, which is hinged to the connecting rod 206, to perform linear reciprocating motion; since the connecting piece 205 is fixedly connected to the sliding frame 203, the sliding frame 203 performs a smooth reciprocating motion along the sliding groove 202 of the base 201 (the bottom is connected to the sliding groove 202 through a pulley to reduce motion resistance); the two screens 204 inside the sliding frame 203 move synchronously with the sliding frame 203, and the material is fully stratified on the screens 204 under the action of inertial force. The material with a particle size smaller than the aperture of the screen 204 passes through the screen holes and becomes the undersize material, while the material with a particle size larger than the aperture of the screen 204 moves along the screen surface and becomes the oversize material, thus completing the grading.

[0033] Screen 204 Cleaning: The air pump 303 starts, delivering gas to the connecting part 302 inside the mounting box 301. The gas is then transmitted via the connecting hose 304 (through the slot 103 of the glass door panel 102) to the spray seat 305 in the cleaning section. Simultaneously, the servo motor 309 drives the lead screw 308 inside the fixed base 307 to rotate. The lead screw 308 drives the spray seat 305 to move back and forth along the fixed base 307. The gas in the spray seat 305 is sprayed out from several spray nozzles 306 at the bottom, acting on the surface of the screen 204 and the screen holes, blowing off any attached or blocked material particles. The two cleaning sections work together to expand the cleaning range through the displacement of the spray seat 305, achieving comprehensive cleaning of the screen 204, avoiding clogging, and ensuring continuous screening.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dry depth screening screen for fine-particle materials, characterized in that, Includes an outer shell structure (10), the inner part of which is provided with a screening structure (20), the connection of which is provided with a cleaning mechanism (30), and the top of which is provided with a feed inlet (40). The feed inlet (40) is used to transfer materials into the interior of the outer shell structure (10) and to screen them through the screening structure (20); The cleaning mechanism (30) includes a mounting box (301), two gas delivery sections and two cleaning sections. The two cleaning sections are fixedly installed on the inner wall of the outer shell structure (10) and are used to clean the screening structure (20).

2. The dry depth screening tensioned screen for fine-grained materials according to claim 1, characterized in that, The outer shell structure (10) includes a protective cover (101), and the front of the protective cover (101) is provided with a glass door panel (102), and the glass door panel (102) is also provided with two slots (103).

3. The dry depth screening tension screen for fine-grained materials according to claim 2, characterized in that, The screening structure (20) includes a base (201), and two sliding grooves (202) are provided on the top of the base (201). A sliding frame (203) is provided inside the two sliding grooves (202), and two screens (204) are provided inside the sliding frame (203).

4. A dry depth screening tension screen for fine-grained materials according to claim 3, characterized in that, The screening structure (20) also includes a connector (205), which is fixedly installed at the sliding frame (203). A connecting rod (206) is hinged at the connection of the connector (205), and a rotating disk (207) is hinged at the connection of the connecting rod (206). A drive motor (208) is provided at the input end of the rotating disk (207).

5. A dry depth screening tension screen for fine-grained materials according to claim 4, characterized in that, The drive motor (208) is used to drive the rotating disk (207) to rotate, and then drive the connecting piece (205) to move through the connecting rod (206). The connecting piece (205) is fixedly connected to the sliding frame (203). The bottom of the sliding frame (203) is connected to the sliding groove (202) through the pulley.

6. A dry depth screening tensioned screen for fine-grained materials according to claim 5, characterized in that, The gas transmission section includes a connecting member (302), which is located inside the mounting box (301). An air pump (303) is provided at the connection of the connecting member (302), and a connecting hose (304) is provided at the top of the connecting member (302).

7. A dry depth screening tension screen for fine-grained materials according to claim 6, characterized in that, The cleaning section includes a fixed seat (307), which is fixedly installed on the inner wall of the outer shell structure (10). The fixed seat (307) is provided with a lead screw (308) inside. The input end of the lead screw (308) is provided with a servo motor (309). The connection of the lead screw (308) is provided with a spray seat (305). The bottom of the spray seat (305) is provided with several spray nozzles (306).

8. A dry depth screening tension screen for fine-particle materials according to claim 7, characterized in that, The connecting hose (304) passes through the slot (103) and is connected to the spray seat (305). The air pump (303) is used to deliver gas to the interior of the spray seat (305). The spray seat (305) is connected to the spray nozzle (306) to spray the gas onto the screen (204). The servo motor (309) is used to drive the lead screw (308) to rotate, thereby driving the spray seat (305) to move.

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