A new type of wind uniformity device and wind screening system

Abstract

This case provides a new type of uniform wind device and wind screening system, in which the uniform wind mesh plate can be rotatably set in the ventilation duct, and the control system controls the uniform wind mesh plate to swing in the ventilation duct. When the wind screening system is in operation, the uniform wind mesh plate has two states. In the uniform wind state, the uniform wind mesh plate is parallel to the cross section of the ventilation duct, and the air is dispersed by the uniform wind mesh plate into an airflow evenly distributed on the cross section of the ventilation duct; in the cleaning state, the uniform wind mesh plate is perpendicular to the cross section of the ventilation duct, and the accumulated light-weight flexible bulk materials are cleaned up. During operation, the double uniform wind mesh plates are in the uniform wind state in turn, that is, the air flow in the channel is kept uniform at any time, avoiding the problem of uneven air flow distribution and periodic large fluctuations in air flow velocity caused by the only uniform wind mesh plate rotating from the uniform wind state to the cleaning state or from the cleaning state back to the uniform wind state in the prior art, resulting in poor material sorting effect, which can greatly improve the sorting quality of flexible bulk materials.

Description

Technical Field

[0001] The invention belongs to the technical field of wind screening systems, and in particular relates to a novel wind uniforming device and a wind screening system. Background Art

[0002] In the existing wind screening system for flexible bulk materials (such as tobacco), the sorting air used for screening is recycled. In order to ensure that the sorting air flow in the air channel is evenly distributed over the entire cross section, a uniform air mesh plate perpendicular to the channel direction is set on the cross section of the air channel in the front section of the sorting, and the circulating air is treated uniformly before the flexible bulk materials are screened by wind.

[0003] Since there is inevitably a very small amount of lightweight flexible bulk material in the circulating air, the accumulation of these very small amounts of lightweight flexible bulk material will cause the uniform air mesh plate to be blocked, and eventually affect the normal air supply of the wind screening system. Therefore, the only uniform air mesh plate provided in the prior art is rotatable. However, in the process of rotating the only uniform air mesh plate from the uniform air state to the clean state or from the clean state back to the uniform air state, the air flow distribution is uneven and the air flow velocity fluctuates greatly periodically, resulting in a significant decrease in the sorting quality of the flexible bulk material.

[0004] Therefore, how to overcome the above technical defects is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a novel wind uniformity device and a wind screening system, which avoids the blockage of the wind uniformity mesh plate and can maintain the uniform distribution of air flow.

[0006] In order to solve the above technical problems, the present invention provides a novel wind uniformity device, comprising:

[0007] Ventilation ducts;

[0008] Two air-uniform mesh plates rotatably arranged on the ventilation duct are used to continuously and uninterruptedly perform air-uniform processing on the airflow passing through the ventilation duct;

[0009] A control system is used to control the swing of the uniform wind screen.

[0010] Optionally, the two air uniforming mesh plates are arranged axially along the ventilation duct.

[0011] Optionally, when the wind screening system is running, the states of the two uniform wind screens are switched to each other to ensure that they are always in a uniform wind state and a clean state respectively.

[0012] Optionally, the control system includes:

[0013] A driving mechanism for driving each of the air uniforming screens to rotate;

[0014] A proximity photoelectric switch for monitoring whether each of the air-distributing screens is rotated into place;

[0015] The controller is used to receive the proximity photoelectric switch signal. When a preset time interval is reached, after one of the two uniform wind screens is in the uniform wind state working position, the controller controls the other of the two uniform wind screens to rotate to the cleaning state working position to ensure that one of the uniform wind screens is in the uniform wind state at any time.

[0016] Optionally, the driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0017] Optionally, the controller includes an electromagnetic reversing valve.

[0018] Optionally, an alarm system is also included, which is used to receive the proximity photoelectric switch signal and alarm when the air uniformity screen is not in place within a preset time interval.

[0019] Optionally, the cross-section of the ventilation duct is rectangular or circular.

[0020] Optionally, both sides of the air uniforming mesh plate are straight edges, or both sides of the air uniforming mesh plate are provided with air uniforming teeth, and the air uniforming teeth are close to the ventilation duct.

[0021] The present solution also provides a wind screening system, comprising the novel wind uniforming device as described above.

[0022] A novel air uniforming device provided by the present invention comprises a ventilation duct, two air uniforming mesh plates and a control system. The air uniforming mesh plate can be rotatably arranged on the ventilation duct, and is used to continuously and uninterruptedly perform air uniforming treatment on the airflow passing through the ventilation duct. The control system is used to control the swing of the air uniforming mesh plate relative to the ventilation duct. When the wind screening system is in operation, the air uniforming mesh plate has two states, wherein the surface of the air uniforming mesh plate in the air uniforming state is parallel to the cross-section of the ventilation duct, and the air is dispersed into an airflow uniformly distributed on the cross-section of the ventilation duct by the mesh holes evenly distributed on the air uniforming mesh plate. The surface plane of the air uniforming mesh plate in the cleaning state is perpendicular to the cross-section of the ventilation duct, and the accumulated light-weight flexible bulk material is cleaned up. The use of the novel air uniforming device avoids the blockage of the air uniforming mesh plate and can maintain the uniform distribution of the air flow.

[0023] The present invention also provides a wind screening system having the above-mentioned novel wind uniforming device, so it also has the above-mentioned beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 A front view of a novel air uniformity device provided in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Cross-sectional view in the M direction;

[0027] Figure 3 A front view of another novel air uniforming device provided by an embodiment of the present invention;

[0028] Figure 4 for Figure 3 Cross-sectional view in the M direction;

[0029] Figure 5 for Figure 3 Sectional view in direction A.

[0030] Reference numerals in the above figure include:

[0031] 1. Ventilation duct; 2. First air uniforming mesh plate; 201. First air uniforming mesh plate in air uniforming state; 3. First rotating shaft; 4. First air cylinder; 5. First proximity photoelectric switch; 6. Second proximity photoelectric switch; 7. Second air cylinder; 8. Second rotating shaft; 9. Second air uniforming mesh plate; 901. Second air uniforming mesh plate in cleaning state; 902. Air uniforming teeth on both sides of the second air uniforming mesh plate; 10. Air outlet; 11. Air inlet. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] The core of the present invention is to provide a novel wind uniformity device and a wind screening system, which avoids the blockage of the wind uniformity mesh plate and can maintain the uniform distribution of air flow.

[0037] In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Please combine Figure 2-Figure 5 ,refer to Figure 1 The present invention provides a novel air uniformity device, comprising a ventilation duct 1, two air uniformity mesh plates and a control system.

[0039] The two ends of the ventilation duct 1 are respectively an air inlet 11 and an air outlet 10. The arrangement direction of the ventilation duct 1 includes but is not limited to the vertical direction, the shape of the ventilation duct 1 includes but is not limited to a straight channel, the cross-sectional shape of the ventilation duct 1 includes but is not limited to a rectangular shape, the arrangement direction, cross-sectional shape and size of the ventilation duct 1 can be selected according to actual applications, and the ventilation duct 1 that meets the above functions is within the protection scope of this case.

[0040] The air-uniform mesh plate can be rotatably arranged on the ventilation duct 1, and a plurality of evenly distributed meshes are arranged on the air-uniform mesh plate, which is used to continuously and uninterruptedly perform air-uniform treatment on the airflow passing through the ventilation duct 1. Of course, the types of flexible materials to be sorted include but are not limited to tobacco, and the meshes of the air-uniform mesh plate include but are not limited to holes formed by mechanical processing.

[0041] The control system is used to control the swinging of the air uniformity screen in the ventilation duct 1, specifically, to swing between the working position (i.e., perpendicular to the axis of the ventilation duct 1) and the cleaning position (i.e., the working position rotated 90° and coplanar with the axis of the ventilation duct 1).

[0042] It should be noted that when the wind screening system is running, Figure 2As shown, the uniform wind mesh plate has two states, one is the uniform wind state 201, at this time, the surface of the uniform wind mesh plate is parallel to the cross section of the ventilation duct 1, and the air is dispersed by the mesh holes evenly distributed on the uniform wind mesh plate into an airflow evenly distributed on the cross section of the ventilation duct 1; the other is the cleaning state 901, at this time, the surface plane of the uniform wind mesh plate is perpendicular to the cross section of the ventilation duct 1, and the accumulated light-weight flexible bulk materials are cleaned up.

[0043] In the wind screening system, the sorting air enters from the air inlet 11 of the ventilation duct 1, is evenly treated by the air-evening mesh plate, and is discharged from the air outlet 10. To ensure that the sorting air flow in the ventilation duct 1 is evenly distributed over the entire cross section, an air-evening mesh plate is provided on the cross section of the ventilation duct 1. In the even-wind state, the air-evening mesh plate is perpendicular to the axial direction of the ventilation duct 1. At this time, the air-evening mesh plate occupies the entire cross section of the ventilation duct 1, and the air flow in the ventilation duct 1 is evenly distributed. To prevent the accumulation of light-weight flexible bulk materials from clogging the air-evening mesh plate, the air-evening mesh plate rotates 90 degrees at regular intervals (the time interval can be set by the program) and is in a cleaning state to clean up the accumulated light-weight flexible bulk materials.

[0044] Among them, the preset time interval refers to the time during which each uniform air mesh plate maintains a uniform air state, and means that the time interval is dynamically adjustable on the electrical controller within a certain period of time (for example, within 5 minutes) according to the characteristics of the screened material.

[0045] Through the above arrangement, the new type of air uniformity device is adopted to avoid the blockage of the air uniformity mesh plate, and the uniform distribution of air flow can be maintained.

[0046] In order to achieve uniform distribution of air flow on the cross section of the channel, ensure stable sorting effect, and greatly improve the quality of flexible bulk material sorting, two uniform air mesh plates are arranged axially along the ventilation duct 1. When the wind screening system is running, the states of the two uniform air mesh plates are switched to ensure that they are always in a uniform air state and a clean state respectively.

[0047] In the above embodiment, the control system includes a driving mechanism, a proximity photoelectric switch and a controller, wherein each of the two uniform air mesh plates is configured with a driving mechanism and a proximity photoelectric switch, the driving mechanism is used to drive the uniform air mesh plate to rotate, and the proximity photoelectric switch is used to monitor whether the uniform air mesh plate is rotated in place. The controller is used to receive the signals of the two proximity photoelectric switches, and when a preset time interval is reached, after one of the two uniform air mesh plates is in the uniform air state working position, the controller controls the other of the two uniform air mesh plates to rotate to the cleaning state working position.

[0048] Specifically, the driving mechanism can be a cylinder or a hydraulic cylinder, and of course other driving methods are also possible. The controller includes an electromagnetic reversing valve. The action of each uniform air mesh plate, the holding time of the uniform air and cleaning state, and the cycle period are all completed by the corresponding instructions issued by the electrical controller to control the corresponding electromagnetic reversing valve and cylinder to ensure that there is always a uniform air mesh plate in the uniform air state.

[0049] The wind-uniform mesh plate is connected to the ventilation duct 1 through a rotating shaft. The transmission shaft of the driving mechanism is connected to the rotating shaft to drive the wind-uniform mesh plate to rotate.

[0050] Furthermore, the present solution also includes an alarm system for receiving proximity photoelectric switch signals and alarming when the air-distributing screen is not in place when the preset time interval is reached. If any of the first proximity photoelectric switch 5 and the second proximity photoelectric switch 6 does not detect that the corresponding air-distributing screen has rotated to the specified position, the electrical controller will issue a fault alarm "material jam" to prompt maintenance personnel to handle it in time.

[0051] The working process of the above embodiment is as follows: after the wind screening system is started, the sorting air enters from the air inlet 11, the first uniform wind mesh plate 2 is in the uniform wind state 201, and the second uniform wind mesh plate 9 is in the clean state 901. At this time, the air outlet 10 blows out a uniformly distributed airflow; after a pre-set time interval, the second uniform wind mesh plate 9 is first driven by the second cylinder 7 to rotate 90 degrees to the uniform wind state 201, and the second proximity photoelectric switch 6 monitors whether the second uniform wind mesh plate 9 is rotated in place, and the first uniform wind mesh plate 2 is then driven by the first cylinder 4 to rotate 90 degrees to the clean state, and the first proximity photoelectric switch 5 monitors whether the first uniform wind mesh plate 2 is rotated in place. At this time, the air outlet 10 still blows out a uniformly distributed airflow. After a pre-set time interval again, the first uniform wind mesh plate 2 returns to the uniform wind state, and then the second uniform wind mesh plate 9 returns to the clean state. This cycle is repeated, so that the air flow is always evenly distributed on the cross section of the air channel 1.

[0052] Based on the above embodiment, the air uniformity mesh plate can be designed in one case so that both sides of the air uniformity mesh plate are straight edges or other arc edges close to the inner wall of the ventilation duct 1 (close in the uniform wind state).

[0053] In another preferred embodiment, both sides of the air uniformity mesh plate are provided with air uniformity teeth, and the air uniformity teeth are close to the ventilation duct 1. Figure 3-Figure 5As shown, the gap between the uniform wind teeth on the edges of both sides of the first uniform wind mesh plate / the second uniform wind mesh plate and the side plate of the channel duct 1 is very small, and the uniform wind teeth and the two side plates are combined into a uniform uniform wind mesh. This setting can ensure that the airflow flowing through the ventilation duct 1 can be fully evenly distributed in any area. When working, the double uniform wind mesh plates are in the uniform wind state in turn (a single uniform wind mesh plate without uniform wind teeth has no way to achieve this key function), that is, the air flow in the channel is kept uniform at any time, avoiding the problem of uneven air flow distribution and periodic large fluctuations in air flow speed caused by a single uniform wind mesh plate without uniform wind teeth in a clean state, resulting in poor material sorting effect, which can greatly improve the sorting quality of materials.

[0054] Specifically, Figure 5 As shown, the uniform air holes of the uniform air mesh plate are rectangular holes. It can be seen that the edge of the uniform air mesh plate is provided with uniform air teeth, which together with the side panels of the air passage form uniformly distributed square uniform air holes, thus avoiding uneven air on both sides of the uniform air mesh plate. The sides of the uniform air teeth on both sides of the uniform air mesh plate are rounded to reduce the wear on the inner wall surface of the ventilation duct 1.

[0055] Through the above-mentioned setting method, the changes in air velocity and flow rate caused by the change in effective ventilation cross-sectional area when the single uniform air mesh device is flipped are avoided, the purpose of fundamentally reducing the fluctuation of air flow velocity in the air channel is achieved, and the sorting quality of flexible bulk materials is greatly improved.

[0056] In addition, the present application also discloses a wind screening system, including the novel wind uniformity device disclosed in the above embodiment. Therefore, the wind screening system with the novel wind uniformity device also has all the above technical effects, which will not be described one by one here.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A new type of uniform air flow device, characterized in that: include: Ventilation duct (1); Two air-uniform mesh plates rotatably arranged on the ventilation duct (1) are used to continuously and uninterruptedly perform air-uniform processing on the airflow passing through the ventilation duct (1); A control system, used for controlling the swing of the wind-uniform mesh plate; The two air uniforming mesh plates are arranged axially along the ventilation duct (1); When the wind screening system is in operation, the states of the two uniform wind screens are switched to ensure that they are always in a uniform wind state perpendicular to the axis of the ventilation duct (1) and a clean state coplanar with the axis of the ventilation duct (1), respectively. The control system comprises: A driving mechanism for driving each of the air uniforming screens to rotate; A proximity photoelectric switch for monitoring whether each of the air-distributing screens is rotated into place; A controller, for receiving the proximity photoelectric switch signal, and controlling the other of the two uniform air mesh plates to rotate to a cleaning state working position after one of the two uniform air mesh plates is in a uniform air state working position when a preset time interval is reached, so as to ensure that one of the uniform air mesh plates is in a uniform air state at any time; It also includes an alarm system for receiving the proximity photoelectric switch signal and alarming when the air-distributing screen is not in place within a preset time interval; Both sides of the air uniforming mesh plate are provided with air uniforming teeth, and in the air uniforming state, the air uniforming teeth are close to the ventilation duct (1); The uniform air mesh plate is provided with a plurality of evenly distributed meshes.

2. The novel wind uniformity device according to claim 1 is characterized in that: The driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

3. The novel air uniformity device according to claim 1 is characterized in that: The controller includes an electromagnetic reversing valve.

4. The novel wind uniformity device according to claim 1 is characterized in that: The cross section of the ventilation duct (1) is rectangular or circular.

5. A wind screening system, characterized in that: It comprises a novel wind uniforming device as described in any one of claims 1 to 4.

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