Screening equipment and production system

Abstract

The embodiment of the utility model provides screening equipment and a production system. Wherein the screening equipment comprises a vibrating screen and a first fan; the vibrating screen is provided with a discharge port and a cleaning port; the discharging port is used for discharging materials screened out by the vibrating screen, and the material cleaning port is used for discharging retentate on the vibrating screen. The first fan is provided with an air outlet, and the air outlet faces the vibrating screen on one side of the vibrating screen; and the material cleaning port and the first fan are respectively positioned on two opposite sides of the vibrating screen. Airflow generated by the first fan reaches the material cleaning port from one side of the vibrating screen along the screen mesh surface of the vibrating screen, and retentate on the screen mesh of the vibrating screen is discharged from the material cleaning port along with the airflow under the action of the airflow. Therefore, according to the technical scheme provided by the embodiment of the utility model, the materials retained on the vibrating screen can be automatically cleaned, manual cleaning is not needed, and the screening efficiency of the screening equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical equipment technical field especially relates to screening equipment and production system. BACKGROUND

[0002] Many production equipment's raw materials are powder, such as extruder. Powder is influenced by humidity in the air during long-time storage, and a small amount of powder will gather into larger particles. These large particles cannot be fully dissolved in the heating link of the extruder, thereby affecting the effect of extrusion molding. Therefore, the powder needs to be sieved before entering the extruder to screen out large particles. After the vibration screen works for a period of time, there will be a large number of large particles accumulated on the screen of the vibration screen, causing the screen to be blocked.

[0003] Currently, the staff will regularly clean the screen of the vibration screen. Manual cleaning not only affects the sieving efficiency, consumes labor, but also produces dust affecting the health of the operator. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a screening equipment and production system to automatically clean the screen of the vibration screen.

[0005] To achieve this purpose, the utility model embodiment adopts the following technical scheme:

[0006] In the first embodiment of the utility model, a screening equipment is provided. The screening equipment comprises:

[0007] The vibration screen has a discharge port and a cleaning port. The discharge port is used to discharge the material screened by the vibration screen, and the cleaning port is used to discharge the retained material on the vibration screen.

[0008] The first fan has an air outlet, and the air outlet is on one side of the vibration screen and faces the vibration screen.

[0009] Among them, the cleaning port and the first fan are located on two opposite sides of the vibration screen.

[0010] Optionally, the screening equipment further comprises a flour mill, and the inlet end of the flour mill is in communication with the cleaning port.

[0011] Further, the flour mill and the cleaning port can be connected through a cleaning channel. One end of the cleaning channel is in communication with the cleaning port, and the inlet end of the flour mill is in communication with the other end of the cleaning channel.

[0012] Optionally, the screening equipment can further comprise a back screening channel. One end of the back screening channel is in communication with the discharge end of the flour mill, and the other end is in communication with the inlet port of the vibration screen.

[0013] Optionally, the screening device further comprises a feeding device; the feeding device is used for conveying the material discharged from the discharge end of the grinding machine to the inlet of the vibrating screen through the return screen channel.

[0014] Optionally, the feeding device comprises a second fan; the second fan is located at one side of the discharge end of the grinding machine; one end of the return screen channel, which is in communication with the discharge end of the grinding machine, is located at the other side of the discharge end of the grinding machine; the air outlet of the second fan faces the return screen channel.

[0015] Optionally, the screening device further comprises a control device; the control device is electrically connected with the vibrating screen, the first fan, the grinding machine and the feeding device respectively.

[0016] Optionally, the vibrating screen comprises a plurality of screens; the plurality of screens are arranged in a stacked manner, and the mesh of a downstream screen is smaller than the mesh of an upstream screen.

[0017] Optionally, along the stacking direction of the plurality of screens, the first fan is located in the middle part of the vibrating screen; or along the stacking direction of the plurality of screens, the first fan is located in the upper part of the vibrating screen.

[0018] In the second embodiment of the utility model, a production system is provided. The production system comprises:

[0019] The screening device provided in the above embodiments; and

[0020] A production device is located downstream of the screening device.

[0021] The inlet of the production device corresponds to the discharge port of the screening device.

[0022] Optionally, the production device comprises:

[0023] A feeding member, the inlet of the feeding member corresponds to the discharge port of the screening device;

[0024] An extruder is located at the discharge end of the feeding member.

[0025] In the third embodiment of the utility model, a screening device is provided. The screening device comprises:

[0026] A vibrating screen has a discharge port and a cleaning port; the discharge port is used for discharging the material screened by the vibrating screen, and the cleaning port is used for discharging the retained material on the vibrating screen;

[0027] A cleaning device is used for cleaning the retained material on the vibrating screen, and the retained material is discharged through the cleaning port;

[0028] A grinding machine, the inlet of the grinding machine is in communication with the cleaning port.

[0029] Optionally, the screening device also comprises a feeding device, which is used for conveying the material discharged from the discharge end of the mill to the feeding end of the vibrating screen

[0030] The scheme provided by the embodiment of the present application adds a first fan, a cleaning port for discharging the retained material is added on the vibrating screen, and the first fan and the cleaning port are located at two opposite sides of the vibrating screen; the airflow generated by the first fan flows from one side of the vibrating screen to the cleaning port along the screen surface of the vibrating screen, and the retained material on the screen of the vibrating screen is discharged from the cleaning port along with the airflow. It can be seen that the scheme provided by the embodiment of the present application can realize automatic cleaning of the retained material on the vibrating screen, manual cleaning is not needed, and the screening efficiency of the screening device is improved.

[0031] In the scheme provided by another embodiment of the present application, the cleaning device can clean the retained material on the vibrating screen, the cleaned retained material can enter the mill for milling treatment, and the treated material can also be used as the production raw material of the subsequent production equipment. It can be seen that the scheme provided by the embodiment of the present application can realize automatic cleaning of the retained material on the vibrating screen, and the cleaned retained material can be milled, thereby further improving the screening efficiency of the screening device. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0033] Figure 1 The structural schematic diagram of the screening device provided by an embodiment of the present application is shown in the figure.

[0034] Figure 2 The structural schematic diagram of the screening device containing the mill provided by an embodiment of the present application is shown in the figure.

[0035] Figure 3 The structural schematic diagram of the secondary screening screening device provided by an embodiment of the present application is shown in the figure.

[0036] Figure 4 The structural schematic diagram of the screening device provided by an embodiment of the present application, which uses the second fan to convey the milled material for secondary screening, is shown in the figure.

[0037] Figure 5 The schematic diagram of the first fan provided by an embodiment of the present application in the screening device is shown in the figure.

[0038] Figure 6 The structural schematic diagram of the production system provided by an embodiment of the utility model.

[0039] In the drawing: 1, vibrating screen; 11, screen mesh; 12, discharge port; 13, cleaning material port; 14, feeding port;

[0040] 2, cleaning material device; 21, first fan;

[0041] 3, flour mill; 4, back screening channel; 5, cleaning material channel;

[0042] 6, feeding device; 61, second fan;

[0043] 7, control device;

[0044] 8, production equipment; 81, feeding part; 82, extruder. DETAILED DESCRIPTION

[0045] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model and not limit the utility model. In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings and not all the structures.

[0046] In the description of the utility model, unless another definite provision and limitation, the term "connect", "connection", "fixed" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skill in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the other features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.The terms "on", "under", "right", etc.Orientational or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0047] In view of the problem that the screen is blocked by accumulated large particle materials (hereinafter referred to as retained materials) after the screening device is used for a long time, manual cleaning is time-consuming and laborious, and dust in the screen affects the health of the operator, the utility model provides the following multiple embodiments to provide a scheme capable of automatically cleaning the vibrating screen.

[0048] Referring to Figure 1 The utility model provides a kind of screening equipment provided by an embodiment of the utility model.The screening equipment includes vibrating screen and first fan.Wherein, vibrating screen 1 has inlet 14, discharge port 12 and clean material port 13.To-be-screened material enters vibrating screen 1 through inlet 14.Discharge port 12 is used to discharge the material screened out of vibrating screen 1.Clean material port 13 is used to discharge retained material on vibrating screen 1.In addition, vibrating screen 1 also has at least one screen 11.First fan 21 has air outlet, and air outlet is on the side of vibrating screen 1 towards vibrating screen 1.As shown in Figure 1 Clean material port 13 and the first fan 21 are located at two opposite sides of vibrating screen 1 respectively.

[0049] Specifically, as Figure 1As shown, the first fan 21 generates airflow from one side of the vibrating screen 1. The retained material on the vibrating screen 1 moves along the screen surface of the screen 11 to the opposite side of the first fan 21 under the airflow of the first fan 21, and then is discharged from the vibrating screen 1 through the clean material outlet 13.

[0050] The screening device provided by the embodiment uses the airflow generated by the first fan to clean the retained material on the vibrating screen, and the automatic cleaning of the vibrating screen can be realized by controlling the start and stop of the first fan, without manual cleaning, thereby avoiding some problems existing in manual cleaning.

[0051] The cleaned retained material is essentially large-particle material, which can also be used after being crushed. That is, the embodiment adds a flour mill 3 to the screening device, and the cleaned retained material can enter the flour mill 3 for flour processing. The flour processed by the flour mill can be directly used as raw material for subsequent production equipment. Referring to Figure 2 As shown, the inlet end of the flour mill 3 is in communication with the clean material outlet 13. For example, the flour mill 3 and the clean material outlet 13 are in communication through a clean material channel 5. Referring to Figure 2 One end of the clean material channel 5 is connected with the clean material outlet 13, and the other end of the clean material channel 5 is connected with the inlet end of the flour mill 3. In this way, the material discharged from the clean material outlet 13 can enter the flour mill 3 through the clean material channel 5 for flour processing.

[0052] The cleaned material is processed by the flour mill 3 for flour processing, which can effectively improve the powder output of the screening device. It can be seen that the scheme provided by the embodiment realizes the automatic cleaning function of the large-particle material by adding the flour mill, and improves the performance of the screening device.

[0053] To ensure the quality of the material discharged from the screening device, the material processed by the flour mill for flour processing can be screened again, that is, the material processed by the flour mill is screened again by the vibrating screen 1. As shown in the example, Figure 3 As shown in the example, the outlet end of the flour mill 3 is in communication with the inlet opening 14 of the vibrating screen 1, such as through a pipeline or through a hopper and a pipeline. For example, Figure 4 As shown in the example, the screening device further includes a back screening channel 4. One end of the back screening channel 4 is in communication with the outlet end of the flour mill 3, and the other end of the back screening channel 4 is in communication with the inlet opening 14 of the vibrating screen 1. For example, a hopper is arranged at the outlet end of the flour mill 3, and the material processed by the flour mill enters the hopper, and then enters the vibrating screen 1 through the pipeline in communication with the inlet opening 14 of the vibrating screen 1, for secondary screening.

[0054] The scheme provided by the embodiment can not only screen out large-particle materials, but also automatically grind the screened large-particle materials and then perform secondary screening, so that the materials can be fully utilized under the premise of ensuring the quality of the materials entering subsequent production equipment, time and labor are saved due to automatic operation, manual operation is not required, the probability of contact between an operator and dust is reduced, and the health of the operator is ensured.

[0055] The material after the grinding treatment can be conveyed to the material inlet 14 of the vibrating screen 1 through the feeding device 6. The feeding device 6 can include but is not limited to a conveyor belt or a second fan 61. If the feeding device includes a conveyor belt, the material after the grinding treatment can fall on the conveyor belt, move to the vibrating screen 1 along with the conveyor belt, and enter the vibrating screen 1 from the material inlet 14. The conveyor belt can be arranged in the return screening channel 4, and the return screening channel 4 can be a closed channel, so that the powdered material is closed in the return screening channel 4 and does not pollute the external environment.

[0056] Alternatively, as shown in the examples, Figure 4 the feeding device 6 includes the second fan 61, and the second fan 61 is located on one side of the discharge end of the grinding machine 3. One end of the return screening channel 4 that is in communication with the discharge end of the grinding machine 3 is located on the other side of the discharge end of the grinding machine 3. The air outlet of the second fan 61 faces the return screening channel 4. The return screening channel 4 is a closed channel. The airflow generated by the second fan 61 can blow the material produced by the grinding machine 3 into the return screening channel 4, and the material moves along the airflow in the return screening channel 4 to the vibrating screen 1 and enters the vibrating screen 1 through the material inlet 14.

[0057] As shown in the examples, Figures 1 to 5 the vibrating screen 1 can include a plurality of screens 11. As shown in the examples, Figure 1 the vibrating screen 1 includes two screens 11; as shown in the examples, Figure 5 the vibrating screen 1 includes three screens 11. Of course, the vibrating screen 1 can also include four, five or more screens 11, which are not limited in the embodiment. When large-particle materials accumulate, different particle sizes of the materials can be separated on the multiple layers of screens to prevent the materials from accumulating on one layer of screen and causing the screen to be blocked, thereby affecting the screening efficiency.

[0058] The plurality of screens 11 are stacked, and the mesh of the downstream screen 11 is smaller than the mesh of the upstream screen 11. Taking the vibrating screen 1 including two screens 11 as an example, referring to Figure 1 , the screen located at the upper side (i.e., the upstream screen) can be a 30-mesh screen, and the screen located at the lower side (i.e., the downstream screen) can be a 60-mesh screen.

[0059] Referring to Figure 1The first air blower 21 is located in the middle of the vibrating screen 1 along the stacking direction of the plurality of screens 11 (i.e. the Y direction shown in the figure), so that the airflow generated by the first air blower 21 can cover more layers of screens 11 and act on more layers of screens 11.

[0060] Generally, the upstream screen 11 has larger mesh size, and the retained material retained on the upstream screen has larger volume and mass compared with the downstream screen. As shown in the example, the first air blower 21 is located in the upper part of the vibrating screen 1 along the stacking direction of the plurality of screens 11, so that the airflow of the screen in the upstream part of the plurality of screens is stronger. Assuming that the size of the vibrating screen 1 along the stacking direction of the plurality of screens 11 is H, the setting height of the first air blower 21 can be: h = H / 2 ~ 4H / 5. Figure 5

[0061] The material cleaning port 13 in the embodiment can be located in the middle of the vibrating screen 1 along the stacking direction of the plurality of screens 11 (i.e. the Y direction shown in the figure), or the material cleaning port 13 can be located in the upper part of the vibrating screen 1. The position of the material cleaning port 13 can or can not correspond to the position of the first air blower 21.

[0062] The position of the material cleaning port 13 corresponds to the position of the first air blower 21, i.e. the position of the first air blower 21 is at the same height as the position of the material cleaning port 13. When the first air blower 21 is turned on, the airflow blown out of the air outlet of the first air blower 21 blows up the retained material and carries the retained material out of the material cleaning port 13, so as to take the retained material away from the vibrating screen 1, thereby ensuring the permeability of the screen holes on the vibrating screen 1. When the material cleaning port 13 is aligned with the air outlet of the first air blower 21, the airflow blown out of the air outlet can directly blow into the material cleaning port 13, which makes it easier for the airflow to take the retained material away from the vibrating screen 1.

[0063] The position of the material cleaning port 13 does not correspond to the position of the first air blower 21, e.g. the position of the first air blower 21 is higher than the height of the material cleaning port 13, or the position of the first air blower 21 is lower than the height of the material cleaning port 13; etc.

[0064] In addition, the size of the material cleaning port 13 is not limited in the embodiment.

[0065] Further, as shown in FIGS. Figure 2 3 and 4, the screening device provided by the embodiment further comprises a control device 7. The control device 7 is electrically connected with the vibrating screen 1, the first air blower 21, the grinding machine 3 and the second air blower 61 respectively. The control device 7 can control the vibrating screen 1, the first air blower 21, the grinding machine 3 and the second air blower 61 to work cooperatively, so as to realize the functions of material screening, self-cleaning of retained material, grinding, and secondary screening.

[0066] The control device 7 can be configured with, but not limited to, functions such as counting, timing, data setting and data acquisition.​​

[0067] In some embodiments, the control device 7 stores a predetermined program of the screening device operation to control the vibration screen 1, the first fan 21, the pulverizer 3 and the second fan 61 to perform corresponding tasks according to the predetermined program.

[0068] Specifically, when the vibration screen 1 is started, the control device 7 starts counting and records the number of starts of the vibration screen 1. When the number of starts of the vibration screen 1 reaches a first preset number (such as 10, 50, 200 or other number), the control device 7 controls the first fan 21 to start and records the working time of the first fan 21. The airflow generated by the first fan 21 carries the retained material into the cleaning channel 5 and accumulates at the inlet end of the pulverizer 30. When the working time of the first fan 21 reaches a first set time (such as 5 minutes, 10 minutes or other time), the control device 7 controls the first fan 21 to stop working. The control device 7 will count each start of the first fan 21, that is, the control device 7 will record the number of starts of the first fan 21. When the number of starts of the first fan 21 reaches a second preset number (such as 5, 8 or other number), the control device 7 controls the pulverizer 3 to start. The pulverizer 3 grinds the retained material accumulated at the inlet end to meet the required size of the material. At the same time, the control device 7 will record the working time of the pulverizer 3. When the working time of the pulverizer 3 reaches a second set time (such as 5 minutes, 10 minutes or other time), it is assumed that the retained material has been sufficiently ground, at which time the control device 7 controls the pulverizer 3 to stop working and starts the second fan 61. The airflow generated by the second fan 61 carries the ground material through the back screen channel 4 to the inlet 14 of the vibration screen 1. When the second fan 61 is working, the control device 7 will record the working time of the second fan 61. When the working time of the second fan 61 reaches a third set time (such as 3 minutes, 5 minutes or other time), the control device 7 controls the second fan 61 to stop working.

[0069] From the initial screening of the material by the vibration screen 1, the retained material is carried by the airflow generated by the first fan 21 to the inlet end of the pulverizer 3, and after the retained material is ground to meet the required size of the material, it is carried by the airflow generated by the second fan 61 to the inlet end of the vibration screen 1 for secondary screening, which is an overall cycle. When an overall cycle is completed, the control device 7 will record the data once and upload the data to the terminal to monitor the entire screening process of the screening device in real time to ensure the stability of the production supply and ensure the smooth operation of the production equipment.

[0070] Optionally, the control device 7 can be a central processing unit (CPU), which is a common information processing and program running unit, and is convenient to maintain or replace, and has mature technology and strong running stability.

[0071] The terminal can be a desktop computer, a notebook computer, a mobile device used by a staff, or the like.

[0072] It can be understood that, since the retained material with a large size accounts for a small proportion in the whole material, the amount of the retained material has little influence on the screening efficiency of the vibrating screen 1 after each screening is completed, and if the first fan 21 is started to blow the retained material away after each screening is completed, the electric energy will be wasted, which is not green and environmentally friendly and has high cost. Therefore, in some embodiments of the present application, the first fan 21 is started only after the number of times of starting of the vibrating screen 1 reaches a first preset number of times, so that the screening rate of the vibrating screen 1 is not affected and the number of times of starting of the first fan 21 is reduced, thereby saving electric energy and reducing cost. The first preset number of times can be 10, 15, 20, or the like, and is not limited in the present embodiment.

[0073] As mentioned above, the vibrating screen has multiple layers of screens, and different particle sizes of the material can be separated on the layers of screens, so that the material is prevented from being accumulated on a layer of screen to cause the screen to be blocked. That is, compared with a vibrating screen with a single layer of screen or a small number of layers of screens, the vibrating screen with more layers of screens has a lower blocking rate. Therefore, the first preset number of times can be determined based on the number of layers of screens of the vibrating screen 1.

[0074] The present application also provides a screening device. The screening device comprises the vibrating screen 1, the material cleaning device 2, and the flour mill 3. The vibrating screen 1 has a discharge port 12 and a material cleaning port 13. The material cleaning device 2 is used to clean the retained material on the vibrating screen 1, and the retained material is discharged through the material cleaning port 13. The material inlet of the flour mill 3 is in communication with the material cleaning port 13.

[0075] The material cleaning device 2 in the present embodiment can be the first fan 21 mentioned above. Alternatively, the material cleaning device 2 comprises a scraping arm and a driving assembly arranged in the vibrating screen 1, the driving device drives the scraping arm to act on the screen 11 to scrape the retained material to the material cleaning port 13 and discharge the retained material from the material cleaning port 13. Further, the driving device can also drive the scraping arm to vibrate up and down to hit the screen 11 and clean the material blocked in the mesh. The structure of the driving device and the scraping arm is not limited in the present embodiment.

[0076] The scheme provided by the embodiment can clean the retained material on the vibrating screen, the cleaned retained material can enter the flour mill for flour processing, and the processed retained material can also be used as raw material for subsequent production equipment. It can be seen that the technical scheme provided by the embodiment of the utility model can realize automatic cleaning of the retained material on the vibrating screen, and can also perform flour processing on the cleaned retained material, without manual transfer and processing of the cleaned retained material, thereby further improving the screening efficiency of the screening equipment.

[0077] Further, the screening equipment provided by the embodiment can further include a feeding device 6, which can include but is not limited to a conveyor belt, a second fan 61, etc. The feeding device 6 is used to convey the material discharged from the discharge end of the flour mill 3 to the feeding port 14 of the vibrating screen 1.

[0078] In addition, the screening equipment provided by the embodiment can further include a control device 7, which can be electrically connected with the vibrating screen 1, the cleaning device 2, the flour mill 3 and the feeding device 6.

[0079] It should be noted that the working logic of the control device 7 in the embodiment can refer to the related content in the foregoing description, and the connection of the feeding device, the flour mill and the vibrating screen through the screening channel, the connection of the flour mill and the vibrating screen through the cleaning channel, etc. mentioned in the embodiment can refer to the description in the foregoing description, and will not be repeated here.

[0080] Referring to Figure 6 The utility model further provides a production system. The production system includes screening equipment and production equipment 8. Wherein, the screening equipment can be the screening equipment provided by the foregoing embodiments, and the specific content can refer to the foregoing description, and will not be repeated here. The production equipment 8 is located downstream of the screening equipment. The feeding end of the production equipment 8 corresponds to the discharge port 12 of the screening equipment.

[0081] In a specific embodiment, the production equipment 8 can include a feeding member 81 and an extruder 82. The feeding end of the feeding member 81 corresponds to the discharge port 12 of the screening equipment, and the extruder 82 is located at the discharge end of the feeding member 81. The feeding member 81 can be a hopper, a conveyor belt, etc. The extruder 82 can heat the material and then extrude a product with a predetermined shape, such as a plastic pipe.

[0082] It should be noted that the production equipment in the production system provided by the embodiments of the utility model is not limited to the extruder, but can also be other processing equipment that uses powder material as raw material, and the utility model does not make specific limitation on this.

[0083] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A screening device, characterized in that, include: The vibrating screen (1) has a discharge port (12) and a cleaning port (13); the discharge port (12) is used to discharge the material screened out by the vibrating screen (1), and the cleaning port (13) is used to discharge the residue on the vibrating screen (1); The first fan (21) has an air outlet, and the air outlet faces the vibrating screen (1) on one side; The material cleaning port (13) and the first fan (21) are located on two opposite sides of the vibrating screen (1).

2. The screening equipment according to claim 1, characterized in that, It also includes a grinding mill (3); The feed end of the grinding mill (3) is connected to the cleaning port (13).

3. The screening equipment according to claim 2, characterized in that, It also includes a return screening channel (4); One end of the return screening channel (4) is connected to the discharge end of the grinding mill (3); The other end of the return screening channel (4) is connected to the feed inlet (14) of the vibrating screen (1).

4. The screening equipment according to claim 3, characterized in that, It also includes a feeding device (6); The feeding device (6) is used to transport the material discharged from the discharge end of the mill (3) to the inlet (14) of the vibrating screen (1) through the return screening channel (4).

5. The screening equipment according to claim 4, characterized in that, The feeding device (6) includes a second blower (61); The second blower (61) is located on one side of the discharge end of the grinding mill (3); The end of the return screening channel (4) that is connected to the discharge end of the grinding mill (3) is located on the other side of the discharge end of the grinding mill (3); The outlet of the second fan (61) faces the return screening channel (4).

6. The screening equipment according to claim 4, characterized in that, It also includes a control device (7); The control device (7) is electrically connected to the vibrating screen (1), the first fan (21), the grinding mill (3) and the feeding device (6), respectively.

7. The screening equipment according to any one of claims 1 to 6, characterized in that, The vibrating screen (1) includes multiple screens (11); The plurality of screens (11) are stacked, and the mesh size of the downstream screen (11) is smaller than that of the upstream screen (11).

8. The screening equipment according to claim 7, characterized in that, Along the stacking direction of the plurality of screens (11), the first fan (21) is located in the middle of the vibrating screen (1); or Along the stacking direction of the plurality of screens (11), the first fan (21) is located above the vibrating screen (1).

9. A production system, characterized in that, include: The screening equipment as described in any one of claims 1 to 8; Production equipment (8) is located downstream of the screening equipment; The feed end of the production equipment (8) corresponds to the discharge port (12) of the screening equipment.

10. The production system according to claim 9, characterized in that, The production equipment (8) includes: Feeding component (81), the feed end of the feeding component (81) corresponds to the discharge port (12) of the screening equipment; The extruder (82) is located at the discharge end of the feeder (81).

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