Anti-blocking pneumatic pebble coal feeder and pneumatic pebble coal conveying system
By introducing buffer plates and air guide plates into the pneumatic feeder, the blockage problem caused by fine powder accumulation during the transportation of gravel coal is solved, and the stable transportation of gravel coal and the reliability of the system is improved.
Patent Information
- Application Number
- CN202510136143.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-05-23
AI Technical Summary
The pneumatic conveying system is prone to blockage due to the accumulation of fine powder when transporting gravel coal, especially at the outlet position of the pneumatic feeder.
A gravel coal anti-blocking pneumatic feeder is designed, including air duct, buffer plate and air guide plate. The buffer plate slows down the falling speed of gravel coal, and the air guide plate divides the airflow into upper and lower road winds. The lower road wind is used to transport gravel coal to avoid accumulation.
Effectively prevent gravel coal from accumulating due to excessive drop speed, improve the problem of easy blockage at the outlet position of the pneumatic feeder, and further improve the reliability of the system through an automatic removal mechanism.
Smart Images
Figure CN120024704A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a material feeding device, in particular to a pneumatic feeder for preventing blockage of pebble coal and a pneumatic conveying system for pebble coal. Background Art
[0002] The medium-speed coal mill will produce pebble coal during operation. The pebble coal mainly comes from the gangue and pyrite in the raw coal, which are dense and difficult to grind. The pebble coal will fall below the wind ring when the coal mill is running, and will be sent into the pebble coal hopper by the scraper, and then discharged into the pneumatic conveying system from the discharge port at the bottom of the pebble coal hopper, and finally sent out by pneumatic conveying.
[0003] However, in the actual production process, the pneumatic conveying system can basically work normally when conveying 10-50mm diameter stone coal. But when the stone coal contains more fine powder, the system often gets blocked, and the blockage is mostly at the outlet of the pneumatic feeder. Analyzing the cause of the problem, it is basically due to the fast falling speed of the fine powder, which accumulates in large quantities at the outlet of the pneumatic feeder, resulting in the inability of conveying air to enter the system, causing blockage. Summary of the invention
[0004] The embodiments of the present application at least provide a pneumatic feeder for preventing stone coal from being blocked and a pneumatic conveying system for stone coal, which can improve the problem that the outlet of the existing pneumatic feeder is easily blocked.
[0005] In a first aspect, an embodiment of the present application provides a pneumatic feeder for preventing stone coal from blocking, the pneumatic feeder comprising:
[0006] The air duct includes a feed port at the upper end thereof and air inlets and discharge ports at both sides of the lower end thereof, wherein the feed port is used to communicate with the discharge port of the stone coal hopper;
[0007] A buffer plate is arranged in the air duct and below the feed port, and is used to receive the stone coal;
[0008] The wind guide plate is arranged in the air duct and located on the side of the buffer plate close to the air inlet, and is used to divide the airflow entering from the air inlet into upper wind and lower wind. The upper wind is used to push the stone coal to fall from the buffer plate, and the lower wind is used to send the fallen stone coal to the discharge port.
[0009] In an optional embodiment, the buffer plate is arranged horizontally.
[0010] In an optional implementation, the wind guide plate can rotate relative to the air duct to adjust the air volume of the upper wind and the lower wind.
[0011] In an optional embodiment, the air guide plate has a first end close to the buffer plate and a second end away from the buffer plate, and the first end is provided with a rotating shaft, and the rotating shaft is provided in the air duct and can rotate circumferentially.
[0012] In an optional embodiment, the air guide plate is connected to a driving mechanism, and the driving mechanism is used to drive the air guide plate to rotate relative to the air duct.
[0013] In an optional embodiment, the air duct includes a connecting pipe located at its feed port, and the feed port is connected to the discharge port through the connecting pipe.
[0014] In an optional embodiment, the pneumatic feeder further comprises:
[0015] An air duct is arranged at the bottom of the air duct and extends along the air flow direction. The air outlet end of the air duct is located in front of the discharge port, and is used to allow the lower air to transport the stone coal through the air duct.
[0016] In an optional embodiment, the air inlet end of the air duct is located between the buffer plate and the air inlet.
[0017] In an optional embodiment, there is a gap between the air duct and the buffer plate.
[0018] In an optional embodiment, there are multiple air ducts, and the multiple air ducts are distributed in a stepped manner along the height direction.
[0019] In a second aspect, an embodiment of the present application further provides a pneumatic conveying system for pebble coal, comprising an air supply device and the pebble coal anti-clogging pneumatic feeder as described in any one of the first aspects.
[0020] The above technical solution of the present application has the following beneficial technical effects:
[0021] The pebble coal anti-clogging pneumatic feeder of the embodiment of the present application has a buffer plate that can slow down the falling speed of the pebble coal, so that the pebble coal falls directly to the bottom of the air duct from the feed port. In this way, it can prevent the pebble coal from accumulating and causing blockage due to the excessively fast falling speed, thereby improving the problem of easy blockage at the outlet of the existing pneumatic feeder.
[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solutions of the present application. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.
[0024] Figure 1 A schematic structural diagram of a pebble coal anti-clogging pneumatic feeder provided in an embodiment of the present application is shown;
[0025] Reference numerals:
[0026] 1. Stone coal hopper; 11. Discharge port; 2. Air duct; 21. Feed port; 22. Air inlet; 23. Discharge port; 3. Buffer plate; 4. Air guide plate; 5. Air duct. DETAILED DESCRIPTION
[0027] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.
[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments 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 application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0029] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.
[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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 application.
[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] refer to Figure 1 The embodiment of the present application provides a pneumatic feeder for preventing stone coal from being blocked, and the pneumatic feeder includes an air duct 2, a buffer plate 3 and an air guide plate 4. The air duct 2 includes a feed port 21 located at its upper end and an air inlet 22 and an outlet 23 located on both sides of its lower end. The feed port 21 is used to communicate with the discharge port 11 of the stone coal hopper 1. The buffer plate 3 is arranged in the air duct 2 and is located below the feed port 21, and is used to hold the stone coal. The air guide plate 4 is arranged in the air duct 2 and is located on the side of the buffer plate 3 close to the air inlet 22, and is used to divide the airflow entering from the air inlet 22 into an upper wind and a lower wind. The upper wind is used to push the stone coal to make it fall from the buffer plate 3, and the lower wind is used to send the fallen stone coal to the outlet 23. In specific use, after the pebble coal enters the air duct 2 from the feed port 21, it will first fall on the buffer plate 3, then be blown to the bottom of the air duct 2 by the upper wind, and then be blown to the discharge port 23 by the lower wind. In other words, the buffer plate 3 can slow down the speed of the pebble coal falling, compared with the pebble coal falling directly to the bottom of the air duct 2 from the feed port 21, so that the pebble coal can be prevented from accumulating and causing blockage due to the excessively fast falling speed, thereby improving the problem that the outlet position of the existing pneumatic feeder is easily blocked.
[0033] Optionally, in this embodiment, the feed port 21 of the air duct 2 extends upward to form a tubular structure, and is connected to the discharge port 11 through the upper end of the tubular structure. Specifically, the feed port 21 can be funnel-shaped. This arrangement can facilitate the connection between the feed port 21 and the discharge port 11, thereby facilitating the assembly of the pneumatic feeder and the stone coal hopper 1.
[0034] Optionally, in this embodiment, the feed port 21 is detachably connected to the discharge port 11. For example, the feed port 21 and the discharge port 11 are connected via a flange. This arrangement can facilitate the disassembly and assembly of the pneumatic feeder and the stone coal hopper 1, which is conducive to improving the assembly efficiency.
[0035] Optionally, in the present embodiment, the buffer plate 3 is arranged horizontally. In this arrangement, the pebble coal falling on the buffer plate 3 basically completely depends on the air volume of the upper wind to fall from the buffer plate 3, that is, the falling of the pebble coal can be controlled by controlling the air volume of the upper wind, so as to facilitate precise control. However, the embodiments of the present application do not make any limitation to this. In other embodiments, the buffer plate 3 can also be arranged to be tilted up and down along the airflow direction. For example, the buffer plate 3 gradually tilts downward along the airflow direction, which can reduce the air volume required for the pebble coal to fall from the buffer plate 3. On the contrary, the buffer plate 3 gradually tilts upward along the airflow direction, which can increase the air volume required for the pebble coal to fall from the buffer plate 3.
[0036] Optionally, in this embodiment, the air guide plate 4 can rotate relative to the air duct 2 to adjust the air volume of the upper wind and the lower wind. For example, the air guide plate 4 has a first end close to the buffer plate 3 and a second end away from the buffer plate 3, and the first end is provided with a rotating shaft, which is arranged in the air duct 2 and can rotate circumferentially, and the air guide plate 4 rotates relative to the air duct 2 when the rotating shaft rotates circumferentially. In this way, the air volume ratio of the upper wind and the lower wind can be adjusted, so that the situation of the stone coal falling from the buffer plate 3 can be adjusted while ensuring the conveying effect of the lower wind. Specifically, when the lower wind can convey the stone coal, the air volume ratio of the upper wind can be appropriately increased, so that the moving speed of the stone coal on the buffer plate 3 can be accelerated, and the initial speed of the stone coal in the horizontal direction when falling can also be increased. In addition, by adjusting the air volume ratio of the upper wind and the lower wind, the pneumatic feeder can also be suitable for conveying stone coal of different diameters, which is conducive to improving its applicability.
[0037] Optionally, in the present embodiment, the air deflector 4 is connected to a driving mechanism, and the driving mechanism can directly act on the air deflector 4 to drive the air deflector 4 to rotate relative to the air duct 2. For example, the driving mechanism can be an electric push rod, which is connected to the air deflector 4 and drives the second end of the air deflector 4 to swing up and down to achieve the adjustment of the air volume of the upper wind and the lower wind. However, the embodiments of the present application do not make any restrictions on this. In other embodiments, the driving mechanism can also rotate the air deflector 4 relative to the air duct 2 by driving the rotating shaft. For example, the driving mechanism can be a gear and rack mechanism driven by a motor, wherein the gear is arranged on the rotating shaft, the rack meshes with the gear and is driven by the motor, and when the motor is started, the rack can move in a straight line direction, the rack drives the gear to rotate circumferentially, and the gear drives the rotating shaft to rotate circumferentially, so that the second end of the air deflector 4 swings up and down.
[0038] Optionally, in this embodiment, the pneumatic feeder further includes an air duct 5, which is arranged at the bottom of the air duct 2 and extends along the air flow direction, and the air outlet end of the air duct 5 is located in front of the discharge port 23 (the position between the buffer plate 3 and the discharge port 23), so as to allow the lower wind to transport the pebble coal through the air duct 5. Specifically, the air outlet end of the air duct 5 is located at a position of the air duct 2 that is easily blocked, that is, in front of the discharge port 23. When the discharge port 23 is blocked, the pebble coal pile covers the air outlet end of the air duct 5 and blocks the air duct 2, so that the wind speed of the lower wind increases when it is blown out through the air duct 5, so that the pebble coal pile can be blown away from the inside by a larger air force, and the blown pebble coal can be sent out from the discharge port 23. This arrangement enables the pneumatic feeder to automatically remove the pebble coal blocked at the discharge port 23, thereby further improving the problem that the outlet position of the pneumatic feeder is easily blocked.
[0039] Optionally, in this embodiment, the air inlet end of the air duct 5 is located between the buffer plate 3 and the air inlet 22. This arrangement can keep the air inlet end of the air duct 5 away from the falling radius of the stone coal, thereby preventing the stone coal from blocking the air inlet end of the air duct 5, which is conducive to improving the reliability of the equipment.
[0040] Optionally, in this embodiment, there is a gap between the air duct 5 and the buffer plate 3. In this way, an airflow channel can be formed between the air duct 5 and the buffer plate 3, so that the downwind wind can pass through the airflow channel. When the downwind wind passes through the airflow channel, the pebble coal falling on the air duct 5 can be transported, thereby preventing the pebble coal from accumulating on the air duct 5 and causing blockage.
[0041] Optionally, in this embodiment, there are multiple air ducts 5, and the multiple air ducts 5 are distributed in a stepped manner along the height direction. Specifically, the multiple air ducts 5 form a slope between the buffer plate 3 and the discharge port 23, and the slope can make the fallen stone coal slide down to the discharge port 23 under the action of its horizontal initial speed and its own gravity, thereby further improving the problem that the outlet position of the pneumatic feeder is easily blocked.
[0042] The working process of the pebble coal anti-clogging pneumatic feeder of the embodiment of the present application includes: firstly, adjusting the angle of the air guide plate 4 according to the actual use requirements to adjust the air volume distribution of the upper and lower winds; when the pebble coal in the pebble coal hopper 1 falls from the discharge port 11, the pebble coal enters through the feed port 21 of the air duct 2 and falls on the buffer plate 3; at the same time, the upper wind will blow the pebble coal on the buffer plate 3, so that it moves horizontally and falls on the air duct 5 or the bottom of the air duct 2, and the lower wind will blow the pebble coal on the air duct 5 or the bottom of the air duct 2, so that it continues to move horizontally until it is sent out of the discharge port 23. In the above process, the buffer plate 3 can slow down the speed of the pebble coal falling, relative to the pebble coal falling directly from the feed port 21 to the bottom of the air duct 2, so that the pebble coal can be prevented from accumulating and causing blockage due to the excessively fast falling speed, thereby improving the problem that the outlet position of the existing pneumatic feeder is easily blocked. Furthermore, since the air outlet end of the air duct 2 is located in front of the discharge port 23, when the discharge port 23 is blocked, the wind speed of the lower air when it is blown out through the air duct 5 will increase, so that the pebble coal pile can be blown away from the inside with greater air force, and the blown away pebble coal can be sent out from the discharge port 23. In this way, the problem of easy blockage at the outlet of the pneumatic feeder can be further improved.
[0043] The embodiment of the present application also provides a pneumatic conveying system for pebble coal, including an air supply device and a pebble coal anti-blocking pneumatic feeder. The buffer plate 3 of the pebble coal anti-blocking pneumatic feeder can slow down the speed of the pebble coal falling, relative to the pebble coal falling directly from the feed port 21 to the bottom of the air duct 2. In this way, it can prevent the pebble coal from accumulating and causing blockage due to the excessively fast falling speed, thereby improving the problem that the outlet position of the existing pneumatic feeder is easily blocked. In addition, since the air outlet end of the air duct 2 is located in front of the discharge port 23, when the discharge port 23 is blocked, the wind speed of the lower wind when it is blown out through the air duct 5 will increase, so that the pebble coal pile can be blown away from the inside by a larger air force, and the blown pebble coal can be sent out from the discharge port 23. In this way, the problem that the outlet position of the pneumatic feeder is easily blocked can be further improved.
[0044] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this application.
[0045] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A pneumatic feeder for preventing blockage of stone coal, characterized in that: The pneumatic feeder comprises: The air duct includes a feed port at the upper end thereof and air inlets and discharge ports at both sides of the lower end thereof, wherein the feed port is used to communicate with the discharge port of the stone coal hopper; A buffer plate is arranged in the air duct and below the feed port, and is used to receive the stone coal; The wind guide plate is arranged in the air duct and located on the side of the buffer plate close to the air inlet, and is used to divide the airflow entering from the air inlet into upper wind and lower wind. The upper wind is used to push the stone coal to fall from the buffer plate, and the lower wind is used to send the fallen stone coal to the discharge port.
2. The stone coal anti-clogging pneumatic feeder according to claim 1, characterized in that: The buffer plate is arranged horizontally.
3. The stone coal anti-clogging pneumatic feeder according to claim 1, characterized in that: The wind guide plate can rotate relative to the air duct to adjust the air volume of the upper wind and the lower wind.
4. The stone coal anti-clogging pneumatic feeder according to claim 3, characterized in that: The air guide plate has a first end close to the buffer plate and a second end away from the buffer plate. The first end is provided with a rotating shaft, and the rotating shaft is arranged in the air duct and can rotate circumferentially.
5. The stone coal anti-clogging pneumatic feeder according to claim 3, characterized in that: The air guide plate is connected to a driving mechanism, and the driving mechanism is used to drive the air guide plate to rotate relative to the air duct.
6. The stone coal anti-clogging pneumatic feeder according to claim 1, characterized in that: The pneumatic feeder also includes: An air duct is arranged at the bottom of the air duct and extends along the air flow direction. The air outlet end of the air duct is located in front of the discharge port, and is used to allow the lower air to transport the stone coal through the air duct.
7. The stone coal anti-clogging pneumatic feeder according to claim 6, characterized in that: The air inlet end of the air duct is located between the buffer plate and the air inlet.
8. The stone coal anti-clogging pneumatic feeder according to claim 6, characterized in that: There is a gap between the air duct and the buffer plate.
9. The stone coal anti-clogging pneumatic feeder according to claim 6, characterized in that: There are multiple air ducts, and the multiple air ducts are distributed in a stepped manner along the height direction.
10. A pneumatic conveying system for gravel and coal, characterized in that: The invention comprises an air supply device and the pneumatic feeder for preventing stone coal from blocking as described in any one of claims 1 to 9.