Filter screen and filter device

Abstract

The filter screen comprises first partition plates and second partition plates, the first partition plates and the second partition plates extend in different directions respectively, a plurality of second partition plates and a plurality of first partition plates are connected to form a grid structure, a plurality of filter holes are formed in the grid structure, and the filter holes are communicated with the first partition plates. And the depth of any filter hole is greater than the maximum distance between the inner walls of the filter holes. The long and narrow polygonal filter holes enable the filter screen not to be easily wound with filamentous media, the phenomenon of wire winding is avoided, the filamentous media are further prevented from forming meshes on the filter screen, the condition that small leaves adhere to the filter holes is damaged, smoke media adhering to the filter holes are reduced, blockage of the filter screen is reduced, smooth flowing of airflow is guaranteed, and the service life of the filter screen is prolonged. Therefore, the ventilation and humidification efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the tobacco manufacturing technical field, in particular to a filter screen and a filtering device. BACKGROUND

[0002] The tobacco sheet redrying machine is applied to the threshing and redrying process of the tobacco industry, and is used for drying, cooling and rehumidifying the moisture in the tobacco leaves. In the rehumidifying area of the tobacco sheet redrying machine, the wet hot air is brought out from the side chamber into the main chamber under the driving of the fan, the wet hot air transmits heat and water to the tobacco leaves when passing through the tobacco leaf layer in the main chamber, and then returns to the side chamber through the filter screen at the junction of the main chamber and the side chamber. The continuously circulating humidified hot air completes the process of humidifying the tobacco leaves in the redrying machine box, so that the tobacco leaves reach the moisture requirement for suitable storage.

[0003] In the related art, the filter screen is made of plain steel wire screen, but the wet hot air often carries the hemp filaments and small pieces of material in the tobacco sheet material and adheres them to the filter screen. The adhering process is that the blown wet hemp filaments first hang on the steel wires to form the phenomenon of filament winding filament, and the hemp filaments gradually increase to form irregular small mesh holes, which create conditions for the adhesion of small leaves, and further cause the filter screen to be blocked, affect the airflow flow, and further affect the efficiency of ventilation and humidification. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve one of the problems in the prior art or related art.

[0005] To this end, the first aspect of the present application provides a filter screen.

[0006] The second aspect of the present application provides a filtering device.

[0007] Therefore, according to the first aspect of the technical scheme of the present application, a filter screen is provided, which comprises: a first partition plate and a second partition plate, the first partition plate and the second partition plate respectively extend in different directions, a plurality of second partition plates are connected with a plurality of first partition plates to form a grid structure, a plurality of filter holes are formed on the grid structure, and the depth of any filter hole is greater than the maximum distance between the inner walls of the filter hole.

[0008] In some technical schemes provided by the present application, the filter screen is used for filtering filamentous media, and the depth of the filter hole is greater than the maximum length of the filamentous media.

[0009] In some technical schemes provided by the present application, the depth of the filter hole is 4 to 6 times the maximum inner wall spacing of the filter hole, and the depth of the filter hole is 40 to 60 mm.

[0010] In some technical schemes provided by the present application, the cross-sectional shape of the filter hole is a square, and the side length of the square is 5 to 20 mm.

[0011] In some technical solutions provided by the present application, optionally, the first partition plate and the second partition plate are respectively provided with a groove and a boss, and the boss is matched with the groove.

[0012] In some technical solutions provided by the present application, optionally, the height of the windward end of the first partition plate is lower than the height of the leeward end of the first partition plate, so that an inclined angle is formed between the first partition plate and the horizontal plane.

[0013] In some technical solutions provided by the present application, optionally, the windward end of the second partition plate is provided with a windward surface, and the angle between the first partition plate and the windward surface is the complementary angle of the inclined angle.

[0014] In some technical solutions provided by the present application, optionally, the windward end of the second partition plate is provided with a windward surface, and an installation angle is formed between the windward surface and the vertical surface, and the installation angle is equal to the inclined angle.

[0015] In some technical solutions provided by the present application, optionally, the first partition plate and the second partition plate are made of magnetic material and are connected through magnetic attraction, or the first partition plate and the second partition plate are made of metal material and are connected through welding.

[0016] In the second aspect of the present application, a filter device is provided, which comprises the filter screen provided by any one of the first aspect of the present application.

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

[0018] The long and narrow polygonal filter hole can prevent the filter screen from being entangled with the filamentous medium, avoid the phenomenon of filament winding, prevent the filamentous medium from forming a mesh on the filter screen, destroy the condition that the small blades adhere to the filter hole, reduce the smoke medium adhering to the filter hole, reduce the blockage of the filter screen, ensure the smooth flow of the airflow, and further ensure the efficiency of ventilation and humidification. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals are used throughout the drawings to represent similar components. In the drawings:

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a filter screen according to an embodiment of the present application;

[0021] Figure 2 FIG. 2 is another structural schematic diagram of a filter screen according to an embodiment of the present application;

[0022] Figure 3A structural schematic diagram of a filter device according to an embodiment of the present application;

[0023] Figure 4 A structural schematic diagram of a filter screen according to an embodiment of the present application;

[0024] Figure 5 A structural schematic diagram of a filter screen according to an embodiment of the present application;

[0025] Figure 6 A structural schematic diagram of a filter screen according to an embodiment of the present application.

[0026] wherein, Figures 1 to 6 The correspondence between the reference signs and the component names in the drawings is as follows:

[0027] 10 filter screen, 100 first partition plate, 110 windward end of the first partition plate, 120 leeward end of the first partition plate, 200 second partition plate, 210 windward surface, 300 filter hole, 20 filter device. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solutions, the technical solutions of the embodiments of the present application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0029] The first aspect embodiment of the present application provides a filter screen 10, as shown in Figure 1 , Figure 2 and Figure 3 , the filter screen 10 comprises: a first partition plate 100 and a second partition plate 200, the first partition plate 100 and the second partition plate 200 extend in different directions respectively, a plurality of second partition plates 200 are connected with a plurality of first partition plates 100 to form a grid structure, a plurality of filter holes 300 are formed on the grid structure, and the depth of any filter hole 300 is greater than the maximum distance between the inner walls of the filter hole 300.

[0030] In this embodiment, the filter screen 10 is located on the airflow passage, Figure 3The arrow in the middle indicates the direction of airflow. Multiple first baffles 100 and multiple second baffles 200 are arranged in parallel. The first baffles 100 extend horizontally, while the second baffles 200 extend vertically. The multiple second baffles 200 are connected to the multiple first baffles 100 in a horizontal and vertical cross-connection pattern, forming a grid structure. Adjacent first baffles 100 and second baffles 200 enclose filter holes 300, which are arranged in a rectangular array. The filter holes 300 are used to filter tobacco material in the airflow. The tobacco material includes filamentary and sheet-like materials.

[0031] like Figure 4 As shown, the length H of the filter hole 300 in its extension direction is the depth of the filter hole 300, the distance between adjacent first partitions 100 or adjacent second partitions 200 is the distance D between the inner walls of the filter hole 300, and the depth of the filter hole 300 is greater than the maximum spacing of the inner walls of the filter hole 300, so that the filter hole 300 forms a narrow and long polygon with a deeper depth.

[0032] The narrow and long polygonal filter holes 300 can prevent the filter 10 from being entangled with the filamentous medium, avoiding the phenomenon of wire winding, and preventing the filamentous medium from forming mesh holes on the filter 10, destroying the conditions for small blades to adhere to the filter holes 300, reducing the tobacco medium attached to the filter holes 300, reducing the blockage of the filter 10, ensuring the smooth flow of airflow, and thus ensuring the efficiency of ventilation and humidification.

[0033] For example, the thickness of the first separator 100 and the second separator 200 is 0.5 mm to 2 mm, and the thickness may be 1 mm.

[0034] In some embodiments provided herein, optionally, the filter screen 10 is used to filter filamentous media, and the depth of the filter holes 300 is greater than the maximum length of the filamentous media.

[0035] In this embodiment, the filter screen 10 is capable of filtering the filamentous medium in the airflow, and the depth of the filter hole 300 is greater than the length of the filamentous medium, so that the filamentous medium cannot be entangled on the filter hole 300, which increases the difficulty of the filamentous medium adhering to the filter hole 300, thereby preventing the filamentous medium from forming mesh holes on the filter screen 10 and causing the adhesion of small blades, reducing the blockage of the filter screen 10, and ensuring the smooth flow of the airflow.

[0036] Illustratively, the filamentous medium may be hemp.

[0037] In some embodiments provided in the present application, optionally, the depth of the filter hole 300 is 4 to 6 times the maximum inner wall spacing of the filter hole 300, and the depth of the filter hole 300 is 40 mm to 60 mm.

[0038] In the embodiment, the depth of the filter hole 300 is limited within a reasonable range, the depth of the filter hole 300 is much greater than the distance between the inner walls of the filter hole 300, the hole shape of the filter hole 300 is more elongated, the difficulty of the filamentous medium adhering in the filter hole 300 is increased, thereby reducing the adhesion of the tobacco medium on the filter hole 300, reducing the blockage of the filter screen 10, and ensuring the smooth flow of the airflow.

[0039] Exemplarily, the depth of the filter hole 300 can be 40mm, 50mm or 60mm.

[0040] In some embodiments provided in the present application, optionally, the cross-sectional shape of the filter hole 300 is a square, and the side length of the square is 5mm to 20mm.

[0041] In the embodiment, the filter hole 300 is taken along the vertical plane extending in the direction of the filter hole 300, the distance between the inner walls of the filter hole 300 is the side length of the filter hole 300 in the cross section, the distance between the adjacent first partition plates 100 is the same as the distance between the adjacent second partition plates 200, and the side length of the filter hole 300 in the cross section is equal, that is, the cross-sectional shape of the filter hole 300 is a square, so that the interception effect of each inner wall of the filter hole 300 on the tobacco medium is the same, and the uniformity of the filtering effect of the filter hole 300 is improved.

[0042] Exemplarily, the side length of the square can be 5mm, 10mm or 20mm.

[0043] In some embodiments provided in the present application, optionally, the first partition plate 100 and the second partition plate 200 are respectively provided with a groove and a boss, and the boss is matched with the groove.

[0044] In the embodiment, one of the first partition plate 100 and the second partition plate 200 is provided with a groove, and the other is provided with a boss, the boss can be embedded in the groove and engaged with the groove, so that the boss and the groove are matched to form a mortise and tenon structure, which facilitates the positioning of the first partition plate 100 and the second partition plate 200, improves the convenience of the first partition plate 100 and the second partition plate 200 during assembly, enhances the connection strength of the first partition plate 100 and the second partition plate 200, and further improves the assembly efficiency and stability of the filter screen 10.

[0045] Exemplarily, the number of the boss or the groove can be multiple, and the number of the boss and the groove is the same, and the multiple bosses and the multiple grooves are respectively distributed at intervals.

[0046] In some embodiments provided in the present application, as shown in Figure 5 and Figure 6 , optionally, the height of the windward end 110 of the first partition plate is lower than the height of the leeward end 120 of the first partition plate, so that an inclined angle is formed between the first partition plate 100 and the horizontal plane.

[0047] In this embodiment, the end of the first baffle 100 facing the impact of the airflow is the windward end, and the end away from the impact of the airflow is the leeward end. The height of the windward end is lower than the height of the leeward end, so that the windward end 110 of the first baffle is tilted downward relative to the horizontal plane, as shown in FIG. Figure 5 As shown, angle A is the inclined angle between the first partition 100 and the horizontal plane, which makes the open end of the filter hole 300 tilt downward. The tobacco medium in the filter hole 300 slides downward under the action of gravity, which can increase the difficulty of the tobacco medium to adhere, thereby reducing the adhesion of the tobacco medium to the filter hole 300 and reducing the clogging of the filter 10.

[0048] Exemplarily, the tilt angle is 30° to 60°.

[0049] In some embodiments provided in this application, Figure 5 As shown, optionally, a windward surface 210 is provided on the windward end of the second partition 200, and the angle between the first partition 100 and the windward surface 210 is the complementary angle of the inclined angle.

[0050] In this embodiment, the end surface of the second partition plate 200 facing the airflow impact is the windward surface 210, and the windward surface 210 is parallel to the vertical plane. Figure 5 As shown, the first partition 100 is tilted on the second partition 200, so that the first partition 100 forms an angle B with the windward surface 210, and the angle A and the angle B are complementary angles to each other. When the first partition 100 forms an inclined angle with the horizontal plane, the filter 10 can be vertically installed on the installation wall, reducing the difficulty of installing the filter 10.

[0051] In some embodiments provided in this application, Figure 6 As shown, optionally, a windward surface 210 is provided on the windward end of the second partition 200 , and an installation angle is provided between the windward surface 210 and the vertical plane, and the installation angle is equal to the tilt angle.

[0052] In this embodiment, the second partition plate 200 is installed tilted relative to the vertical plane. Figure 6 As shown, an installation angle C is formed between the windward surface 210 and the plumb plane, and the angle C is equal to the angle A, so that an inclined angle is formed between the first partition 100 and the horizontal plane. At the same time, the first partition 100 can be perpendicular to the windward surface 210, reducing the difficulty of processing and assembling the first partition 100 and the second partition 200.

[0053] In some embodiments provided herein, optionally, the first partition 100 and the second partition 200 are made of magnetic material and are connected by magnetic attraction, or the first partition 100 and the second partition 200 are made of metal material and are connected by welding.

[0054] In this embodiment, the first partition 100 and the second partition 200 are magnetic, and the magnetism of the two is opposite, so that the first partition 100 and the second partition 200 can be connected by magnetic attraction, which improves the convenience of assembling the first partition 100 and the second partition 200, and the first partition 100 and the second partition 200 are detachably connected, which facilitates the maintenance and replacement of the first partition 100 and the second partition 200 in later use.

[0055] The first separator 100 and the second separator 200 are connected by welding, which improves the connection strength between the first separator 100 and the second separator 200 and improves the stability of the filter screen 10. For example, the first separator 100 and the second separator 200 are made of stainless steel.

[0056] In the second embodiment of the present application, a filtering device 20 is provided, such as Figure 3 As shown, the filtering device 20 includes the filter screen 10 provided by any one of the first aspect embodiments described above.

[0057] In this embodiment, it should be noted that the filter device 20 includes the filter screen 10 provided in any of the above embodiments, and thus has all the beneficial technical effects of the above filter screen 10. To avoid repetition, they are not described here.

[0058] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0059] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A filter screen, characterized in that: include: A first partition and a second partition, the first partition and the second partition extend in different directions respectively, a plurality of second partitions are connected with a plurality of first partitions to form a grid structure, a plurality of filter holes are formed on the grid structure, and the depth of any filter hole is greater than the maximum distance between the inner walls of the filter holes.

2. The filter screen according to claim 1, characterized in that The filter screen is used for filtering filamentous media, and the depth of the filter holes is greater than the maximum length of the filamentous media.

3. The filter screen according to claim 1, characterized in that The depth of the filter holes is 4 to 6 times the maximum inner wall spacing of the filter holes, and the depth of the filter holes is 40 mm to 60 mm.

4. The filter screen according to claim 1, characterized in that The cross-sectional shape of the filter hole is a square, and the side length of the square is 5 mm to 20 mm.

5. The filter screen according to claim 1, characterized in that A groove and a boss are respectively provided on the first partition plate and the second partition plate, and the boss matches the groove.

6. The filter screen according to claim 1, characterized in that The height of the windward end of the first partition is lower than the height of the leeward end of the first partition, so that an inclined angle is formed between the first partition and the horizontal plane.

7. The filter screen according to claim 6, characterized in that A windward surface is provided on the windward end of the second partition plate, and an angle between the first partition plate and the windward surface is a complementary angle of the inclined angle.

8. The filter screen according to claim 6, characterized in that A windward surface is provided on the windward end of the second partition, and an installation angle is provided between the windward surface and the vertical plane, and the installation angle is equal to the tilt angle.

9. The filter screen according to any one of claims 1 to 8, characterized in that The first partition and the second partition are made of magnetic material and are connected by magnetic attraction; or The first separator and the second separator are made of metal material and are connected by welding.

10. A filtering device, characterized in that: include: The filter according to any one of claims 1 to 9.

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