Screening device

Abstract

The utility model provides a screening device, and belongs to the technical field of electromagnetic shielding material production equipment. Comprising a bearing base, a crushing and screening structure is installed on the bearing base, the crushing and screening structure comprises a material collecting barrel fixedly installed at the top of the bearing base, the interior of the material collecting barrel is connected with a screening barrel, a crushing mechanism is installed in the screening barrel, and a driving mechanism for driving the crushing mechanism to rotate is installed on one side of the crushing and screening structure. According to the utility model, the crushing mechanism is arranged, and the crushing mechanism mounted in the screening cylinder is used for crushing the filler and is matched with the screening effect of the screening cylinder, so that the integration of crushing and screening is effectively realized, the repeated operation of crushing, screening and crushing is avoided, the processing time of crushing and screening is saved, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic shielding material production equipment, and particularly relates to a screening device. Background Technique

[0002] Conductive rubber is a common electromagnetic shielding material used in electronic products. It is made by adding conductive fillers to a rubber matrix and achieving electrical conductivity by pressing to make the conductive particles contact. Common conductive fillers used in manufacturing conductive rubber include carbon black, graphite, etc. The fillers need to be crushed and screened before being added and then mixed with rubber. Common crushing and screening devices are usually two separate pieces of equipment. Large particles of the filler need to be preliminarily crushed and then screened. The larger particles are screened out and then re-invested in the crushing equipment for secondary crushing. Such repeated operations are carried out multiple times, resulting in low work efficiency.

[0003] After retrieval, it is found that the Chinese patent with the publication number CN 115155731 A proposes a raw material crushing and screening device for producing conductive silicone rubber, including a crushing part; the crushing part is used for crushing raw materials and includes at least one set of rolling extrusion modules and a supporting rolling module; the rolling extrusion module is used to extrude the raw materials on the supporting rolling module, and the rolling extrusion module always contacts the supporting rolling module and swings or rotates in a cyclic manner; the supporting rolling module is used to place and support the raw materials to be rolled and pressed by the rolling extrusion module, including a flat plate, and the supporting rolling module is provided with sieve holes penetrating up and down; a flexible up and down sliding support module is arranged at the lower end of the supporting rolling module to buffer and support the vibration of the supporting rolling module, and when the supporting rolling module is tilted, both ends are balanced, and the raw materials flow to the rolling and pressing area where the rolling extrusion module and the supporting rolling module contact under the action of gravity.

[0004] The above technical solution uses a compression spring to increase the amplitude of the sieve plate to improve the screening efficiency. However, in actual use, the vibration of the sieve plate will cause a gap between the sieve plate and the notch, and then cause the particles on the upper sieve plate to fall onto the lower sieve plate, thus affecting the screening accuracy. Therefore, the present application provides a screening device to meet the requirements. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a screening device to solve the problem that the existing crushing and screening are carried out separately, and multiple repeated operations are required, resulting in low work efficiency.

[0006] To solve the above technical problems, the utility model provides the following technical solutions:

[0007] A screening device, comprising a bearing base, on which a crushing and screening structure integrating crushing and screening is installed. The crushing and screening structure includes an aggregate cylinder fixedly installed on the top of the bearing base. Inside the aggregate cylinder, a screening cylinder for screening is connected. The screening cylinder is connected to the aggregate cylinder through a rear end cover and a front end cover respectively. Inside the screening cylinder, a crushing mechanism for crushing is installed. On one side of the crushing and screening structure, a driving mechanism for driving the crushing mechanism to rotate is installed.

[0008] Optionally, the aggregate cylinder has a spindle-shaped structure. A retaining bar is fixedly connected to the inner wall of the aggregate cylinder. There are multiple groups of the retaining bars and they are evenly distributed on the inner wall of the aggregate cylinder. An outlet is provided on the side wall of the aggregate cylinder. Positioning grooves are provided on the inner side walls of both ends of the aggregate cylinder, and a roller is rotatably connected inside the positioning grooves.

[0009] Optionally, the screening cylinder has a spindle-shaped structure. Multiple groups of reinforcing ribs are evenly arranged on the side wall of the screening cylinder, and sieve holes are evenly opened on the screening cylinder.

[0010] Optionally, the reinforcing rib has an arc-shaped groove structure, and sieve holes are also provided on the side wall of the reinforcing rib.

[0011] Optionally, a cover plate is provided at one end of the screening cylinder, and a feeding port is opened in the middle of the cover plate.

[0012] Optionally, the crushing mechanism includes a central roller rotatably connected to the cover plate. The crushing mechanism is a tapered cylinder with thick ends and a thin middle. A central gear is fixedly connected to the end of the crushing mechanism far from the cover plate.

[0013] Optionally, planetary rollers are symmetrically arranged on both sides of the central roller. The planetary roller has a spindle-shaped structure and is adapted to the screening cylinder and the central roller. One end of the central roller can rotate relative to the cover plate, and a planetary gear is fixedly connected to the other end of the central roller. The central gear is meshed with the planetary gear.

[0014] Optionally, the rear end cover is fixedly connected to one end of the screening cylinder and covers the crushing mechanism. Tooth grooves adapted to the planetary gear are provided on the inner wall of the rear end cover, and the planetary gear is meshed with the rear end cover.

[0015] Optionally, the front end cover is fixedly connected to the other end of the screening cylinder and covers the cover plate. An opening adapted to the feeding port is opened in the middle of the front end cover.

[0016] Optionally, the driving mechanism includes a reducer connected to a motor. The output end of the reducer is connected to the central gear through the rear end cover.

[0017] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0018] In the above solution, by setting the reinforcing ribs, the structural strength of the screening cylinder can be effectively enhanced, preventing the screening cylinder from deforming under the extrusion of the crushing mechanism and affecting the crushing effect. Meanwhile, during the rotation of the screening cylinder, the reinforcing ribs can drive some materials to rise as the screening cylinder rotates and drop under the action of gravity when the screening cylinder rises to a high position, thereby achieving the purpose of turning over the materials, further increasing the crushing effect, reducing the phenomenon of uneven crushing. Moreover, during the rotation of the screening cylinder, the reinforcing ribs collide with the retaining bars on the aggregate cylinder and generate vibrations, causing the screening cylinder to vibrate, effectively preventing the sieve holes from being blocked and improving the screening effect.

[0019] By setting the crushing mechanism, the crushing mechanism installed in the screening cylinder crushes the filler while cooperating with the screening effect of the screening cylinder, effectively realizing the integration of crushing and screening, avoiding the repetitive operations of crushing - screening - crushing, saving the processing time of crushing and screening, and effectively improving the working efficiency. Description of the Drawings

[0020] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0021] Figure 1 It is a three - dimensional structural schematic diagram of the screening device;

[0022] Figure 2 It is a three - dimensional structural schematic diagram of the cooperation between the aggregate cylinder and the screening cylinder;

[0023] Figure 3 It is an enlarged three - dimensional structural schematic diagram of the crushing mechanism;

[0024] Figure 4 It is an enlarged three - dimensional structural schematic diagram of the partial section of the aggregate cylinder;

[0025] Figure 5 It is a three - dimensional structural schematic diagram of the screening cylinder.

[0026] [Reference Numerals]

[0027] 1. Bearing base; 2. Aggregate cylinder; 3. Screening cylinder; 4. Crushing mechanism; 5. Rear end cover; 6. Front end cover; 7. Driving mechanism; 8. Central roller; 9. Planet roller; 10. Central gear; 11. Planet gear; 12. Retaining bar; 13. Discharge port; 14. Positioning groove; 15. Roller; 16. Reinforcing rib; 17. Cover plate; 18. Feeding port.

[0028] As shown in the figure, in order to clearly implement the structure of the embodiments of the present utility model, specific structures and devices are marked in the figure. However, this is only for illustrative purposes and is not intended to limit the present utility model to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0029] The following will describe in detail a screening device provided by the present utility model in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present utility model.

[0030] It should be noted that in the specification, the mention of "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicates that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining embodiments to describe specific features, structures, or characteristics, implementing such features, structures, or characteristics in combination with other embodiments should be within the knowledge scope of those skilled in the relevant art.

[0031] Generally, terms can be understood, at least in part, from their use in the context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that may not be explicitly described.

[0032] It can be understood that the meanings of "on...", "above...", and "overhead of..." in the present utility model should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intermediate features or layers therebetween, and "above..." or "overhead of..." not only means "above" or "overhead of" something, but also can include the meaning of being "above" or "overhead of" something with no intermediate features or layers therebetween.

[0033] In addition, spatial relative terms such as "under", "below", "lower part", "above", "upper part", etc. may be used herein for convenience of description to describe the relationship between one element or feature and another or more elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device may be oriented in other ways, and the spatial relative descriptors used herein may be interpreted accordingly.

[0034] As Figures 1 through 5 shown, an embodiment of the present utility model provides a screening device, which includes a bearing base 1. A crushing and screening structure integrating crushing and screening is installed on the bearing base 1. The crushing and screening structure includes an aggregate cylinder 2 fixedly installed on the top of the bearing base 1. A screening cylinder 3 for screening is connected inside the aggregate cylinder 2. The screening cylinder 3 is connected to the aggregate cylinder 2 through a rear end cover 5 and a front end cover 6 respectively. A crushing mechanism 4 for crushing is installed inside the screening cylinder 3. A driving mechanism 7 for driving the crushing mechanism 4 to rotate is installed on one side of the crushing and screening structure. The aggregate cylinder 2 has a spindle-shaped structure. The aggregate cylinder 2 is used to store the screened particles, and the structure of the aggregate cylinder 2 facilitates the concentration of the screened particles at the discharge port 13 for convenient feeding. A baffle 12 is fixedly connected to the inner wall of the aggregate cylinder 2. There are multiple groups of baffles 12 and they are evenly distributed on the inner wall of the aggregate cylinder 2. The surface of the baffle 12 is an arc structure. A discharge port 13 is provided on the side wall of the aggregate cylinder 2. The discharge port 13 is located in the middle of the aggregate cylinder 2, and during installation, the discharge port 13 should be located at the bottom to facilitate feeding. Positioning grooves 14 are provided on the inner side walls of both ends of the aggregate cylinder 2. Roller wheels 15 are rotatably connected inside the positioning grooves 14. By providing the roller wheels 15, during use, the screening cylinder 3 contacts the roller wheels 15, effectively reducing the friction between the screening cylinder 3 and the aggregate cylinder 2 and accelerating the rotation efficiency of the screening cylinder 3.

[0035] As Figure 2 and Figure 5As shown, the screening cylinder 3 has a shuttle-shaped structure. Multiple groups of reinforcing ribs 16 are evenly arranged on the side wall of the screening cylinder 3, and the screening cylinder 3 is evenly provided with screening holes. The reinforcing ribs 16 are in an arc-shaped groove structure, and the side walls of the reinforcing ribs 16 are also provided with screening holes. By setting the reinforcing ribs 16, the structural strength of the screening cylinder 3 can be effectively enhanced, preventing the screening cylinder 3 from deforming under the extrusion of the crushing mechanism 4 and affecting the crushing effect. At the same time, during the rotation of the screening cylinder 3, the reinforcing ribs 16 can drive some materials to rise with the rotation of the screening cylinder 3 and fall under the action of gravity when the screening cylinder 3 rises to a high position, so as to achieve the purpose of turning the materials, thereby increasing the crushing effect and reducing the phenomenon of uneven crushing. Moreover, during the rotation of the screening cylinder 3, the reinforcing ribs 16 collide with the blocking strips 12 on the aggregate cylinder 2 and generate vibrations, causing the screening cylinder 3 to vibrate tremulously, effectively preventing the screening holes from being blocked and improving the screening effect. One end of the screening cylinder 3 is provided with a cover plate 17, and a feeding port 18 is opened in the middle of the cover plate 17 for feeding materials into the screening cylinder 3.

[0036] As Figure 2 and Figure 3 shown, the crushing mechanism 4 includes a central roller 8 rotatably connected to the cover plate 17. The crushing mechanism 4 is a conical cylinder with thick ends and a thin middle. One end of the crushing mechanism 4 far from the cover plate 17 is fixedly connected with a central gear 10. Planetary rollers 9 are symmetrically arranged on both sides of the central roller 8. The planetary rollers 9 have a shuttle-shaped structure and are adapted to the screening cylinder 3 and the central roller 8. One end of the central roller 8 can rotate relative to the cover plate 17, and the other end of the central roller 8 is fixedly connected with a planetary gear 11. The central gear 10 is meshed with the planetary gear 11. The rear end cover 5 is fixedly connected to one end of the screening cylinder 3 and covers the crushing mechanism 4. Tooth grooves adapted to the planetary gear 11 are provided on the inner wall of the rear end cover 5, and the planetary gear 11 is meshed with the rear end cover 5. The front end cover 6 is fixedly connected to the other end of the screening cylinder 3 and covers the cover plate 17. An opening adapted to the feeding port 18 is opened in the middle of the front end cover 6. The rear end cover 5 and the front end cover 6 seal the two ends of the screening cylinder 3, reducing dust spillage and optimizing the working environment.

[0037] As Figure 1 and Figure 2As shown, the driving mechanism 7 includes a speed reducer connected to the motor. The output end of the speed reducer is connected to the central gear 10 through the rear end cover 5. During use, the driving mechanism 7 drives the speed reducer to rotate, the speed reducer drives the central gear 10 to rotate, the central roller 8 rotates synchronously with the central gear 10. At the same time, the rotation of the central gear 10 drives the planetary gear 11 to rotate, the planetary roller 9 rotates synchronously with the corresponding planetary gear 11. When the planetary gear 11 rotates, it drives the rear end cover 5 to rotate at the same time, and the screening cylinder 3 rotates synchronously with the rear end cover 5. During this process, the central roller 8 rotates on its own axis and rotates relative to the screening cylinder 3. The planetary roller 9 revolves around the central roller 8 and rotates on its own axis at the same time, and also rotates relative to the screening cylinder 3. The rolling between the central roller 8 and the planetary roller 9 and between the planetary roller 9 and the inner wall of the screening cylinder 3 can roll the large particles of the filler entering the screening cylinder 3 into small particles that can pass through the sieve holes on the screening cylinder 3. During the rotation of the screening cylinder 3, it will drive the filler particles to turn over, so that the filler particles that do not meet the requirements are continuously re-rolled until the filler particles can pass through the sieve holes on the screening cylinder 3 and enter the aggregate cylinder 2, thereby achieving the effect of crushing and screening the filler.

[0038] The working principle provided by the present utility model is as follows. During use, large particles of the filler are put into the screening cylinder 3 through the feeding port 18. The driving mechanism 7 is started, the driving mechanism 7 drives the speed reducer to rotate, the speed reducer drives the central gear 10 to rotate, the central roller 8 rotates synchronously with the central gear 10. At the same time, the rotation of the central gear 10 drives the planetary gear 11 to rotate, the planetary roller 9 rotates synchronously with the corresponding planetary gear 11. When the planetary gear 11 rotates, it drives the rear end cover 5 to rotate at the same time, and the screening cylinder 3 rotates synchronously with the rear end cover 5. During this process, the central roller 8 rotates on its own axis and rotates relative to the screening cylinder 3. The planetary roller 9 revolves around the central roller 8 and rotates on its own axis at the same time, and also rotates relative to the screening cylinder 3. The rolling between the central roller 8 and the planetary roller 9 and between the planetary roller 9 and the inner wall of the screening cylinder 3 can roll the large particles of the filler entering the screening cylinder 3 into small particles that can pass through the sieve holes on the screening cylinder 3. During the rotation of the screening cylinder 3, it will drive the filler particles to turn over, so that the filler particles that do not meet the requirements are continuously re-rolled until the filler particles can pass through the sieve holes on the screening cylinder 3 and enter the aggregate cylinder 2, thereby achieving the effect of crushing and screening the filler.

[0039] During the rotation of the screening cylinder 3, the reinforcing ribs 16 on it continuously collide with the stop bars 12, causing strong tremors on the screening cylinder 3, so as to shake off the particles adhering to the side wall of the screening cylinder 3. And the filler particles that meet the requirements after crushing will pass through the sieve holes and enter the aggregate cylinder 2 and gradually concentrate at the discharge port 13, and are discharged from the discharge port 13.

[0040] The present utility model covers any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present utility model. In order to enable the public to have a thorough understanding of the present utility model, specific details are described in detail in the following preferred embodiments of the present utility model. However, those skilled in the art can fully understand the present utility model even without the description of these details. In addition, well-known methods, processes, procedures, components and circuits are not described in detail in order to avoid unnecessary confusion to the essence of the present utility model.

[0041] The above description is only the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A screening device, characterized in that, It includes a bearing base, on which a crushing and screening structure integrating crushing and screening is installed. The crushing and screening structure includes an aggregate cylinder fixedly installed on the top of the bearing base. Inside the aggregate cylinder, a screening cylinder for screening is connected. The screening cylinder is connected to the aggregate cylinder through a rear end cover and a front end cover respectively. Inside the screening cylinder, a crushing mechanism for crushing is installed. On one side of the crushing and screening structure, a driving mechanism for driving the crushing mechanism to rotate is installed.

2. The screening device according to claim 1, characterized in that, The aggregate cylinder is in a shuttle-shaped structure. A baffle is fixedly connected to the inner wall of the aggregate cylinder. There are multiple groups of baffles and they are evenly distributed on the inner wall of the aggregate cylinder. An outlet is provided on the side wall of the aggregate cylinder. Positioning grooves are provided on the inner side walls of the two ends of the aggregate cylinder, and a roller is rotatably connected inside the positioning grooves.

3. The screening device according to claim 1, wherein The screening cylinder is in a shuttle-shaped structure. Multiple groups of reinforcing ribs are evenly arranged on the side wall of the screening cylinder, and sieve holes are evenly opened on the screening cylinder.

4. The screening device according to claim 3, wherein The reinforcing rib is in an arc-shaped groove structure, and sieve holes are also opened on the side wall of the reinforcing rib.

5. The screening device according to claim 3, characterized in that, One end of the screening cylinder is provided with a cover plate, and a feeding port is opened in the middle of the cover plate.

6. The screening device according to claim 5, wherein The crushing mechanism includes a central roller rotatably connected to the cover plate. The crushing mechanism is a conical cylinder with thick ends and a thin middle. One end of the crushing mechanism far from the cover plate is fixedly connected with a central gear.

7. The screening device according to claim 6, wherein Planetary rollers are symmetrically arranged on both sides of the central roller respectively. The planetary rollers are in a shuttle-shaped structure and are adapted to the screening cylinder and the central roller. One end of the central roller can rotate relative to the cover plate, and a planetary gear is fixedly connected to the other end of the central roller. The central gear is meshed and connected with the planetary gear.

8. The screening device according to claim 7, characterized in that The rear end cover is fixedly connected to one end of the screening cylinder and covers the crushing mechanism. A tooth groove adapted to the planetary gear is arranged on the inner wall of the rear end cover, and the planetary gear is meshed and connected with the rear end cover.

9. The screening device according to claim 8, characterized in that, The front end cover is fixedly connected to the other end of the screening cylinder and covers the cover plate. An opening adapted to the feeding port is opened in the middle of the front end cover.

10. The screening device according to claim 9, wherein The driving mechanism includes a speed reducer connected to a motor. The output end of the speed reducer is connected to the central gear through the rear end cover.

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