A screening device for limestone powder processing

Abstract

The utility model discloses a kind of screening devices for limestone powder processing, the utility model relates to limestone powder production technical field.The screening device for limestone powder processing includes support frame, the upper portion of support frame is provided with processing mechanism: screening assembly is set on the upper portion of support frame, for screening lime, stone powder, filtering component includes fixedly installed on the upper portion of support frame air pump, the air inlet end of air pump is fixedly installed with exhaust pipe, the top of exhaust pipe is fixedly installed with filter tube, filter tube is embedded with filter bag in its inside, in screening assembly, inlet hopper and screening pipe are connected by rubber material's connecting pipe and realize soft connection, screening pipe and discharge pipe are connected by rubber adapter pipe and soft connection, reduce the gap leakage dust caused by vibration;The outer edge of canvas material sealing ring above filter screen is fixed with the inner wall of screening pipe, neither affect filter screen vibration, dust can also be prevented from filter screen edge gap diffusion, further curb powder flying.

Description

Technical Field

[0001] This utility model relates to the field of limestone powder production technology, specifically to a screening device for limestone powder processing. Background Technology

[0002] The limestone powder screening device is a key piece of equipment in the limestone processing process. Its core function is to separate limestone powder of different particle sizes through grading and screening to meet the specific needs of subsequent production or application.

[0003] The existing utility model patent with publication number CN221433906U discloses a sieving device for preparing tree trunk whitewash, including a box body with a feeding mechanism on the box body, a fixed plate inside the box body, a support block on the fixed plate, and a sieving cylinder with sieving holes on the support block; the sieving cylinder is located below the feeding mechanism, and the feeding mechanism cooperates with the sieving cylinder to feed and receive materials; a second motor is installed inside the box body, and a rotating shaft is sleeved on the output shaft of the second motor, with a stirring rod fixed on the rotating shaft; a collision and shaking mechanism is set inside the sieving cylinder, which is connected to both the stirring rod and the sieving cylinder, and is used to drive the sieving cylinder to vibrate intermittently. This utility model, with its collision and shaking mechanism, can cause the limestone powder inside the sieving cylinder to vibrate. During the vibration process, the tightly packed limestone powder is loosened, and large solid pieces are shaken away from the sieving holes, thereby increasing the sieving efficiency of the sieving cylinder.

[0004] The aforementioned screening device improves screening efficiency through vibration. Vibration requires a certain gap between the screen and the screening container to allow the screen to vibrate. Vibration causes some airflow near the screen to move, which in turn causes the powder to spread. When the material falls from the feed hopper, the powdered limestone is easily blown away by gravity impact and air disturbance. At the same time, the device collects the screened lime powder through the drawer structure at the bottom of the box, which cannot meet the needs of long-term continuous operation. Furthermore, it is not convenient to discharge the lime powder after screening. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a screening device for limestone powder processing, which solves the problems of powder diffusion during screening and the inability to meet the requirements of long-term continuous operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A screening device for limestone powder processing includes a support frame, and a processing mechanism is disposed above the support frame.

[0007] The screening component is located above the support frame and is used to screen lime and stone powder.

[0008] The filter assembly includes an air pump fixedly mounted above a support frame. An exhaust pipe is fixedly mounted at the air inlet end of the air pump. A filter tube is fixedly mounted at the top end of the exhaust pipe. A filter bag is fitted inside the filter tube. A top cover is movably mounted on the top of the filter tube. A connecting hose is fixedly mounted at the center of the top cover.

[0009] Preferably, the screening assembly includes a feed hopper fixedly installed at the top of the support frame, a connecting pipe fixedly installed at the bottom of the feed hopper, a screening pipe fixedly installed at the bottom of the connecting pipe, a transfer pipe fixedly installed below the screening pipe, a discharge pipe fixedly installed at the bottom of the transfer pipe, a discharge motor fixedly installed inside the discharge pipe, a universal joint fixedly installed at the bottom of the shaft of the discharge motor, an auger fixedly installed at the bottom of the universal joint, a vibration motor fixedly installed on the outside of the screening pipe, a support spring fixedly installed on the outside of the screening pipe, a rubber comb toothed rack fixedly installed at the end of the left branch structure of the screening pipe, a limit block fixedly installed on the inner wall of the screening pipe, a connecting rod inserted through the center of the limit block, a transmission spring inserted through the outside of the connecting rod, a filter screen fixedly installed at the top of the connecting rod, and a sealing ring fixedly installed above the filter screen.

[0010] Preferably, the top end of the exhaust pipe is connected to the inner cavity of the filter pipe, the top of the filter bag is provided with an annular metal structure that fits between the top cover and the top end of the filter pipe, the top cover is connected to the filter pipe through a threaded structure, one end of the connecting hose is fixed to the center of the top cover and the other end is fixed to the top of the screening pipe, and the filter pipe is connected to the inner cavity of the screening pipe through the connecting hose.

[0011] Preferably, the feed hopper is fixedly connected to the support frame, the connecting pipe and the transfer pipe are both made of rubber, the feed hopper is connected to the screening pipe through the connecting pipe, the transfer pipe is located between the bottom end of the screening pipe and the top of the discharge pipe, and the discharge pipe is connected to the screening pipe through the transfer pipe.

[0012] Preferably, one side of the unloading pipe is provided with an upwardly inclined branch structure, the unloading motor is fixedly installed at the top of the branch structure of the unloading pipe, one part of the universal joint is in a vertical state and the other part is in an inclined state, the auger is connected to the shaft of the unloading motor through the universal joint, and the bottom end of the unloading pipe is provided with a cross-shaped structure that forms a rotatable connection with the central shaft of the auger.

[0013] Preferably, the outer side of the screening tube is provided with a protruding structure that forms a sliding connection with the support frame. The support spring is located below the protruding structure of the screening tube, and its bottom end is fixedly connected to the support frame. Three inclined branches are provided on the left side of the screening tube. The filter screen is inclinedly installed inside the screening tube via a connecting rod and a limiting block, and forms a movable connection with the screening tube. The sealing ring is made of canvas, and its outer edge is fixedly connected to the inner wall of the screening tube. The transmission spring is located between the protruding structure on the outer side of the connecting rod and the limiting block.

[0014] Beneficial effects

[0015] This invention provides a screening device for limestone powder processing. Compared with the prior art, it has the following advantages:

[0016] (1) This screening device for limestone powder processing effectively suppresses powder diffusion through the coordinated operation of the filter assembly and the screening assembly. In the filter assembly, after the air pump is started, air is drawn from the filter tube through the exhaust pipe, creating a low-pressure environment inside the filter tube. This environment is then connected to the inner cavity of the screening tube through the connecting hose, causing the air inside the screening tube to flow towards the filter tube, forming a directional airflow circulation. This airflow circulation maintains a low-pressure state inside the screening tube, while external air is supplemented through the feed hopper, the branch ends of the screening tube, and the discharge pipe, preventing dust from overflowing from the gaps due to excessive internal air pressure. At the same time, the filter bag inside the filter tube intercepts the dust carried in the airflow. The annular metal structure at the top of the filter bag is clamped and fixed by the top cover and the top of the filter tube to ensure a sealing and interception effect. The top cover is connected to the filter tube through threads, facilitating subsequent cleaning or replacement of the filter bag to maintain filtration efficiency. In addition, in the screening assembly, the feed hopper and the screening pipe are flexibly connected by a rubber connecting pipe, and the screening pipe and the discharge pipe are flexibly connected by a rubber adapter pipe, reducing dust leakage caused by vibration; the outer edge of the canvas sealing ring above the filter screen is fixed to the inner wall of the screening pipe, which does not affect the vibration of the filter screen and can prevent dust from spreading from the edge gaps of the filter screen, further curbing the flying of powder.

[0017] (2) This screening device for limestone powder processing achieves long-term operation through the vibrating screening structure of the screening component and the continuous conveying design of the unloading mechanism. In the screening component, the vibrating motor drives the screening tube to vibrate. The screening tube slides on the support frame through the outer protrusion structure, and the support spring below provides buffering and restoring force to stabilize the vibration of the screening tube. The vibration is transmitted to the inclined filter screen through the connecting rod and the limiting block. The transmission spring on the outside of the connecting rod buffers the vibration force, keeping the filter screen vibrating moderately, which improves screening efficiency and avoids structural damage caused by excessive vibration. The filter screen aperture decreases from top to bottom to achieve graded screening. Powder that meets the particle size falls through the filter screen, while large particles that cannot pass through slide along the inclined filter screen to the inclined branch structure on the left side of the screening tube under the action of gravity and vibration thrust, and are finally discharged through the end of the branch, avoiding the accumulation of large particles that clog the filter screen. Meanwhile, the falling powder enters the discharge pipe through the transfer pipe. The discharge motor in the discharge pipe drives the auger to rotate through the universal joint. The universal joint adapts to the inclined branch structure of the discharge pipe to ensure stable power transmission. The auger rotates continuously under the support of the cross-shaped structure at the bottom of the discharge pipe, continuously conveying and discharging the powder to avoid material accumulation. Combined with the synergistic effect of grading and screening and continuous discharge, it meets the requirements of long-term continuous operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the unloading pipe of this utility model;

[0020] Figure 3 This is a schematic diagram of the filter installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the filter bag installation structure of this utility model;

[0022] In the diagram: 1. Support frame; 2. Processing mechanism; 21. Screening assembly; 211. Feed hopper;

[0023] 212. Connecting pipe; 213. Screening pipe; 214. Transfer pipe; 215. Discharge pipe; 216. Discharge motor; 217. Universal joint; 218. Screwdriver; 219. Vibration motor; 2110. Support spring; 2111. Rubber comb rack; 2112. Limit block; 2113. Connecting rod; 2114. Transmission spring; 2115. Filter screen; 2116. Sealing ring; 22. Filter assembly; 221. Air pump; 222. Exhaust pipe; 223. Filter pipe; 224. Filter bag; 225. Top cover; 226. Connecting hose. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a screening device for limestone powder processing includes a support frame 1, and a processing mechanism 2 is arranged above the support frame 1.

[0026] The screening assembly 21 is disposed above the support frame 1 and is used to screen lime and stone powder. The screening assembly 21 includes a feed hopper 211 fixedly installed at the top of the support frame 1. A connecting pipe 212 is fixedly installed at the bottom end of the feed hopper 211. A screening pipe 213 is fixedly installed at the bottom end of the connecting pipe 212. A transfer pipe 214 is fixedly installed below the screening pipe 213. A discharge pipe 215 is fixedly installed at the bottom end of the transfer pipe 214. A discharge motor 216 is fixedly installed inside the discharge pipe 215. The bottom end of the shaft of the discharge motor 216 is fixedly installed with... A universal joint 217 is provided, with an auger 218 fixedly installed at its bottom end. A vibration motor 219 is fixedly installed on the outside of the screening pipe 213, and a support spring 2110 is fixedly installed on the outside of the screening pipe 213. A rubber comb rack 2111 is fixedly installed at the end of the left branch structure of the screening pipe 213. A limit block 2112 is fixedly installed on the inner wall of the screening pipe 213, and a connecting rod 2113 is inserted through the center of the limit block 2112. A transmission spring 2114 is inserted through the outside of the connecting rod 2113. A filter screen 2115 is fixedly installed at the top, and a sealing ring 2116 is fixedly installed above the filter screen 2115. The feed hopper 211 is fixedly connected to the support frame 1. The connecting pipe 212 and the adapter pipe 214 are both made of rubber. The feed hopper 211 is connected to the screening pipe 213 through the connecting pipe 212. The adapter pipe 214 is located between the bottom end of the screening pipe 213 and the top of the discharge pipe 215. The discharge pipe 215 is connected to the screening pipe 213 through the adapter pipe 214. One side of the discharge pipe 215 is provided with an upwardly angled branch structure. The unloading motor 216 is fixedly installed at the top of the branch structure of the unloading pipe 215. One part of the universal joint 217 is in a vertical state and the other part is in an inclined state. The auger 218 is connected to the shaft of the unloading motor 216 through the universal joint 217. The bottom end of the unloading pipe 215 is provided with a cross-shaped structure that is rotatably connected to the central shaft of the auger 218. The outer side of the screening pipe 213 is provided with a protruding structure that is slidably connected to the support frame 1. The support spring 2110 is located below the protruding structure of the screening pipe 213 and its bottom end is fixedly connected to the support frame 1. Three inclined branches are provided on the left side of the screening tube 213. The filter screen 2115 is installed obliquely inside the screening tube 213 through the connecting rod 2113 and the limiting block 2112, and forms a movable connection with the screening tube 213. The sealing ring 2116 is made of canvas, and its outer edge is fixedly connected to the inner wall of the screening tube 213. The transmission spring 2114 is located between the protruding structure on the outside of the connecting rod 2113 and the limiting block 2112.

[0027] Specifically, the support frame 1 restricts the movement direction of the screening pipe 213 and the position of the feed hopper 211. During the process of material entering the connecting pipe 212 through the feed hopper 211 and being discharged into the screening pipe 213, the bent pipe structure at the top of the screening pipe 213 prevents the material from falling vertically and impacting the filter screen 2115, thus avoiding dust generation. Since the screening pipe 213 and the support frame 1 form a sliding connection, and the position of the screening pipe 213 is restricted by the support spring 2110, after the vibration motor 219 is started, the screening pipe 213 will move up and down above the support frame 1, generating vibration. The vibration is transmitted to the filter screen 2115 by the support spring 2110, reducing the vibration amplitude of the filter screen 2115. While maintaining the vibration of the filter screen 2115, this prevents the filter screen 2115 from generating a large impact force with the material during its up-and-down vibration, thus avoiding dust generation. There are three filter screens 2115, which are installed inside the screening pipe 213. The aperture of the filter screens 2115 decreases from top to bottom, which can classify and screen materials. Powdered materials will pass through the filter screens 2115 and be discharged downward into the discharge pipe 215 at the bottom. The discharge motor 216 drives the auger 218 to rotate, continuously discharging lime powder.

[0028] The filter assembly 22 includes an air pump 221 fixedly installed above the support frame 1. An exhaust pipe 222 is fixedly installed at the air inlet end of the air pump 221. A filter pipe 223 is fixedly installed at the top end of the exhaust pipe 222. A filter bag 224 is fitted inside the filter pipe 223. A top cover 225 is movably installed on the top of the filter pipe 223. A connecting hose 226 is fixedly installed at the center of the top cover 225. The top end of the exhaust pipe 222 communicates with the inner cavity of the filter pipe 223. The top of the filter bag 224 is provided with an annular metal structure that fits between the top cover 225 and the top end of the filter pipe 223. The top cover 225 is movably connected to the filter pipe 223 through a threaded structure. One end of the connecting hose 226 is fixed to the center of the top cover 225, and the other end is fixed to the top of the screening pipe 213. The filter pipe 223 communicates with the inner cavity of the screening pipe 213 through the connecting hose 226.

[0029] Specifically, when the air pump 221 starts, it draws air out of the filter tube 223 through the exhaust pipe 222, reducing the air pressure inside the filter tube 223. This causes air inside the screening tube 213 to enter the filter tube 223 through the connecting hose 226, creating airflow inside the screening tube 213. External airflow enters the screening tube 213 through the feed hopper 211, the end of the left branch structure of the screening tube 213, and the bottom discharge pipe 215, maintaining a low-pressure state inside the device and preventing dust from being discharged to the outside through the perforated structure. After the airflow carries the dust into the filter tube 223, it is intercepted by the filter bag 224. Furthermore, any content not described in detail in this specification is prior art known to those skilled in the art.

[0030] During operation, the material enters through the feed hopper 211 and is discharged into the screening pipe 213 through the connecting pipe 212. The bent structure at the top of the screening pipe 213 can reduce the dust generated by the material falling vertically and impacting the filter screen 2115. After the vibration motor 219 is started, the screening pipe 213 slides on the support frame 1 through the outer protrusion structure. The support spring 2110 provides support and buffering below the protrusion structure of the screening pipe 213, causing the screening pipe 213 to vibrate. The vibration is transmitted to the filter screen 2115 through the connecting rod 2113 and the limiting block 2112. The transmission spring 2114 buffers between the outer protrusion of the connecting rod 2113 and the limiting block 2112, allowing the filter screen 2115 to maintain moderate vibration. Since the filter screen 2115 is installed at an angle via the connecting rod 2113 and the limiting block 2112, during vibration, large particles that cannot pass through the filter holes will slide along the surface of the inclined filter screen 2115 under the combined action of gravity and vibration thrust; the outer edge of the canvas sealing ring 2116 is fixed to the inner wall of the screening tube 213, which can prevent dust from leaking out from the edge of the filter screen, while not affecting the vibration of the filter screen. The filter screen 2115 has a decreasing aperture from top to bottom, achieving graded screening. Powdered materials that meet the particle size requirements pass through the filter screen 2115 downwards, enter the discharge pipe 215 through the transfer pipe 214, and start the discharge motor 216. Through the universal joint 217, the auger 218 rotates inside the discharge pipe 215. The cross-shaped structure at the bottom of the discharge pipe 215 supports the central shaft of the auger 218, enabling continuous material discharge. Large particles that cannot pass through the filter holes are pushed by vibration into the inclined branch structure on the left side of the screening pipe 213, and are finally discharged through the rubber comb toothed strip 2111 at the end of the branch structure. At the same time, the air pump 221 starts, and the air in the filter tube 223 is drawn out through the exhaust pipe 222, which reduces the air pressure in the filter tube 223. The air in the screening pipe 213 enters the filter tube 223 through the connecting hose 226 to form an airflow, which prevents dust from overflowing. The dust in the airflow is intercepted by the filter bag 224 in the filter tube 223. The annular metal structure at the top of the filter bag 224 is fitted between the top cover 225 and the top of the filter tube 223. The top cover 225 is connected to the filter tube 223 by threads, which facilitates the subsequent disassembly and replacement of the filter bag 224.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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 screening device for limestone powder processing, comprising a support frame (1), characterized in that: A processing mechanism (2) is provided above the support frame (1): The screening component (21) is located above the support frame (1) and is used to screen lime and stone powder; The filter assembly (22) includes an air pump (221) fixedly installed above the support frame (1). An exhaust pipe (222) is fixedly installed at the air inlet end of the air pump (221). A filter pipe (223) is fixedly installed at the top end of the exhaust pipe (222). A filter bag (224) is fitted inside the filter pipe (223). A top cover (225) is movably installed on the top of the filter pipe (223). A connecting hose (226) is fixedly installed at the center of the top cover (225).

2. The screening device for limestone powder processing according to claim 1, characterized in that: The screening assembly (21) includes a feed hopper (211) fixedly installed at the top of the support frame (1). A connecting pipe (212) is fixedly installed at the bottom of the feed hopper (211). A screening pipe (213) is fixedly installed at the bottom of the connecting pipe (212). A transfer pipe (214) is fixedly installed below the screening pipe (213). A discharge pipe (215) is fixedly installed at the bottom of the transfer pipe (214). A discharge motor (216) is fixedly installed inside the discharge pipe (215). A universal joint (217) is fixedly installed at the bottom of the shaft of the discharge motor (216). An auger (218) is fixedly installed at the bottom of the universal joint (217). The screening assembly (211) includes a feed hopper (211) fixedly installed at the top of the support frame (1). A vibration motor (219) is fixedly installed on the outside of the tube (213), a support spring (2110) is fixedly installed on the outside of the screening tube (213), a rubber comb toothed rack (2111) is fixedly installed at the end of the left branch structure of the screening tube (213), a limit block (2112) is fixedly installed on the inner wall of the screening tube (213), a connecting rod (2113) is inserted through the center of the limit block (2112), a transmission spring (2114) is inserted through the outside of the connecting rod (2113), a filter screen (2115) is fixedly installed at the top of the connecting rod (2113), and a sealing ring (2116) is fixedly installed above the filter screen (2115).

3. A screening device for limestone powder processing according to claim 2, characterized in that: The top end of the exhaust pipe (222) is connected to the inner cavity of the filter pipe (223). The top of the filter bag (224) is provided with an annular metal structure that fits between the top cover (225) and the top end of the filter pipe (223). The top cover (225) is connected to the filter pipe (223) through a threaded structure. One end of the connecting hose (226) is fixed to the center of the top cover (225), and the other end is fixed to the top of the sieve pipe (213). The filter pipe (223) is connected to the inner cavity of the sieve pipe (213) through the connecting hose (226).

4. A screening device for limestone powder processing according to claim 2, characterized in that: The feed hopper (211) is fixedly connected to the support frame (1). The connecting pipe (212) and the transfer pipe (214) are both made of rubber. The feed hopper (211) is connected to the screening pipe (213) through the connecting pipe (212). The transfer pipe (214) is located between the bottom end of the screening pipe (213) and the top of the discharge pipe (215). The discharge pipe (215) is connected to the screening pipe (213) through the transfer pipe (214).

5. A screening device for limestone powder processing according to claim 2, characterized in that: The unloading pipe (215) has an upward branch structure on one side. The unloading motor (216) is fixedly installed at the top of the branch structure of the unloading pipe (215). One part of the universal joint (217) is in a vertical state and the other part is in an inclined state. The auger (218) is connected to the shaft of the unloading motor (216) through the universal joint (217). The bottom end of the unloading pipe (215) is provided with a cross-shaped structure that forms a rotatable connection with the central shaft of the auger (218).

6. A screening device for limestone powder processing according to claim 2, characterized in that: The outer side of the screening tube (213) is provided with a protruding structure that forms a sliding connection with the support frame (1). The support spring (2110) is located below the protruding structure of the screening tube (213) and its bottom end is fixedly connected to the support frame (1). The left side of the screening tube (213) is provided with three inclined branches. The filter screen (2115) is installed obliquely inside the screening tube (213) through the connecting rod (2113) and the limiting block (2112) and forms a movable connection with the screening tube (213). The sealing ring (2116) is made of canvas and its outer edge is fixedly connected to the inner wall of the screening tube (213). The transmission spring (2114) is located between the protruding structure on the outer side of the connecting rod (2113) and the limiting block (2112).

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