Blanking device for raw coal bunker

Abstract

The invention provides a discharging device for a raw coal bunker, the raw coal bunker is provided with a first feeding port located in the upper end and a first discharging port located in the lower end, and the discharging device comprises a feeding bin, a discharging pipe, a stirring mechanism and a spiral shaft; the feeding bin is provided with a second feeding port located at the upper end and a second discharging port located at the lower end, the second feeding port is located below the first discharging port and connected with the first discharging port, and the second discharging port is connected to the discharging pipe; the stirring mechanism is arranged in the raw coal bunker and is used for crushing coal entering the raw coal bunker; the spiral shaft is arranged in the feeding bin and used for driving coal entering the feeding bin to be discharged through the discharging pipe. According to the scheme, the problem that the discharging speed is reduced or discharging is stopped due to different coal sizes during discharging of an existing raw coal bunker can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of coal feeding equipment, and in particular to a feeding device for a raw coal bin. Background Art

[0002] In thermal power plants, coal is usually put into the raw coal bunker after it arrives. When it is used, the coal feeder is used to transport the coal from the raw coal bunker to the coal-using place. However, since the coal put into the raw coal bunker is generally unprocessed, the coal is of different sizes. Therefore, when the coal is discharged from the raw coal bunker, large pieces of coal are easy to block the discharge port or discharge pipe, causing the discharge speed of the raw coal bunker to slow down or stop. Summary of the invention

[0003] The embodiments of the present application at least provide a material discharge device for a raw coal bunker, which can improve the problem of a reduced discharge speed or stopped discharge due to the different sizes of coal in the existing raw coal bunker during discharge.

[0004] An embodiment of the present application provides a unloading device for a raw coal bin, wherein the raw coal bin has a first feed port located at the upper end and a first discharge port located at the lower end, and the unloading device includes: a feeding bin, a discharge pipe, a stirring mechanism and a screw shaft; the feeding bin has a second feed port located at the upper end and a second discharge port located at the lower end, the second feed port is located below the first discharge port and connected to the first discharge port, and the second discharge port is connected to the discharge pipe; the stirring mechanism is arranged in the raw coal bin, for crushing the coal entering the raw coal bin; the screw shaft is arranged in the feeding bin, for driving the coal entering the feeding bin to be discharged through the discharge pipe.

[0005] In an optional embodiment, the stirring mechanism includes a motor, a rotating shaft and a stirring rod, the motor is arranged on the top of the raw coal bin, the rotating shaft is arranged in the raw coal bin and connected to the driving shaft of the motor, and the stirring rod is arranged on the rotating shaft.

[0006] In an optional embodiment, the rotating shaft is connected to the screw shaft, and the rotating shaft transmits torque to the screw shaft to make it rotate circumferentially.

[0007] In an optional embodiment, a guide structure is provided in the feeding bin, and the guide structure is arranged around the second discharge port and is used to gather the coal toward the second discharge port under the action of gravity.

[0008] In an optional embodiment, the unloading device further includes: a purge mechanism, which is connected to the raw coal bin and is used to purge the coal residue inside the raw coal bin and the feeding bin so that it is discharged from the unloading pipe.

[0009] In an optional embodiment, the purge mechanism includes a fixed plate, an air pump and an air blowing pipe, the fixed plate is fixed to the side wall of the raw coal bin, the air pump is arranged on the fixed plate, and the air blowing pipe is arranged inside the raw coal bin and connected to the air outlet of the air pump.

[0010] In an optional embodiment, the blowing pipe is annular, and a plurality of nozzles are evenly distributed along the circumferential direction at the bottom of the blowing pipe.

[0011] In an optional embodiment, the purge mechanism further includes an air intake pipe and a filter element, the air intake pipe is connected to the air inlet of the air pump, and the filter element is arranged in the air intake pipe.

[0012] In an optional embodiment, the raw coal bin is provided with a cover plate and an opening and closing assembly, the cover plate is connected to the raw coal bin via the opening and closing assembly, and has a first state of opening the first feed port and a second state of closing the first feed port.

[0013] In an optional embodiment, the opening and closing assembly includes a fixed frame and an electric push rod, the fixed frame is arranged on the raw coal bin, the electric push rod is arranged on the fixed frame and connected to the cover plate, and the electric push rod is used to drive the cover plate to rise and fall for state conversion.

[0014] The above technical solution of the present application has the following beneficial technical effects:

[0015] In the unloading device for the raw coal bunker of the embodiment of the present application, before the coal is discharged from the raw coal bunker, its stirring mechanism can crush the coal entering the raw coal bunker to prevent the coal from being blocked at the unloading port (first unloading port) due to different sizes, resulting in a reduction in the unloading speed of the raw coal bunker or a stop in the unloading. After the coal is discharged from the raw coal bunker, its spiral shaft can realize spiral conveying of the coal through spiral motion to make it enter the unloading pipe, and the spiral shaft can also perform secondary crushing on large pieces of coal during the process of conveying the coal to prevent the coal from being blocked at the unloading pipe, resulting in a reduction in the unloading speed of the raw coal bunker or a stop in the unloading.

[0016] 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

[0017] 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.

[0018] Figure 1 A schematic structural diagram of a raw coal bunker unloading device provided in an embodiment of the present application is shown;

[0019] Figure 2 Shows Figure 1 Schematic diagram of the assembly of the stirring mechanism;

[0020] Figure 3 Shows Figure 1 Schematic diagram of the internal structure of the middle feeding bin;

[0021] Figure 4 Shows Figure 1 Assembly diagram of the middle purge mechanism;

[0022] Figure 5 Shows Figure 1 A schematic diagram of the structure of the middle closing mechanism;

[0023] Reference numerals:

[0024] 1. Raw coal bin; 11. First feed port; 12. First discharge port; 2. Feed bin; 21. Second feed port; 22. Second discharge port; 23. Flow guide structure; 3. Feed pipe; 4. Stirring mechanism; 41. Motor; 42. Rotating shaft; 43. Stirring rod; 5. Screw shaft; 51. Shaft; 52. Screw blade; 6. Purge mechanism; 61. Fixed plate; 62. Air pump; 63. Blowing pipe; 64. Suction pipe; 65. Filter element; 7. Closing mechanism; 71. Cover plate; 72. Opening and closing assembly; 721. Fixed frame; 722. Electric push rod; 73. Sealing plate. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] refer to Figures 1 to 5 The embodiment of the present application provides a material unloading device for a raw coal bunker 1. The raw coal bunker 1 has a first material inlet 11 at the upper end and a first material outlet 12 at the lower end, and the first material outlet 12 is used to discharge the coal entering the raw coal bunker 1. The material unloading device is applicable to the raw coal bunker 1, and is used to assist the raw coal bunker 1 in discharging materials, so as to improve the problem that the discharging speed of the existing raw coal bunker 1 is reduced or the discharging is stopped due to the different sizes of coal when discharging.

[0031] In some embodiments, the feeding device includes: a feeding bin 2, a feeding pipe 3, a stirring mechanism 4 and a screw shaft 5. The feeding bin 2 has a second feeding port 21 at the upper end and a second discharging port 22 at the lower end, the second feeding port 21 is located below the first discharging port 12 and connected to the first discharging port 12, and the second discharging port 22 is connected to the feeding pipe 3. The stirring mechanism 4 is arranged in the raw coal bin 1, and is used to crush the coal entering the raw coal bin 1. The screw shaft 5 is arranged in the feeding bin 2, and is used to drive the coal entering the feeding bin 2 to be discharged through the feeding pipe 3. Specifically, before the coal is discharged from the raw coal bin 1, the stirring mechanism 4 can crush the coal entering the raw coal bin 1 to prevent the coal from being blocked in the feeding port (first discharging port 12) due to different sizes, causing the discharge speed of the raw coal bin 1 to be reduced or stopped. After the coal is discharged from the raw coal bin 1, the spiral shaft 5 can realize spiral transportation of the coal through spiral motion so that it enters the discharge pipe 3. In addition, during the process of transporting the coal, the spiral shaft 5 can also perform secondary crushing on large pieces of coal to prevent the coal from being blocked in the discharge pipe 3, causing the discharge speed of the raw coal bin 1 to be reduced or stopped.

[0032] In some embodiments, the stirring mechanism 4 may include a motor 41, a rotating shaft 42 and a stirring rod 43. The motor 41 is disposed on the top of the raw coal bin 1. The rotating shaft 42 is disposed in the raw coal bin 1 and connected to the driving shaft of the motor 41. The stirring rod 43 is disposed on the rotating shaft 42. When in use, by starting the motor 41, the driving shaft of the motor 41 drives the rotating shaft 42 to rotate in a circumferential direction, and the rotating shaft 42 drives the stirring rod 43 to rotate, so that the stirring rod 43 can beat the large pieces of coal to break them into small pieces of coal.

[0033] In some embodiments, the spiral shaft 5 may include a shaft 51 and spiral blades 52. The spiral blades 52 are arranged on the shaft 51, and the spiral blades 52 realize spiral rotation when the shaft 51 rotates circumferentially, thereby realizing the transportation and crushing of coal.

[0034] In some embodiments, the shaft 51 is connected to the rotating shaft 42, and the rotating shaft 42 transmits torque to the shaft 51 to make it rotate circumferentially. In this way, the screw shaft 5 and the stirring mechanism 4 can share a motor 41, which can not only save power, but also save installation space of power equipment.

[0035] In some embodiments, a guide structure 23 may be provided in the feed bin 2, and the guide structure 23 is provided around the second discharge port 22, and is used to gather the coal to the second discharge port 22 under the action of gravity. For example, the guide structure 23 has an inclined surface, and the guide structure 23 is provided at the bottom of the feed bin 2 and is located around the second discharge port 22. When the coal falls, the coal can fall along the inclined surface of the guide structure 23 and gather toward the second discharge port 22. This arrangement can facilitate the discharge of coal from the coal bin. It should be understood that in a specific implementation, the guide structure 23 can be composed of a plurality of discrete structures spliced ​​around the second discharge port 22, or it can be an integrated annular structure.

[0036] In some embodiments, the unloading device further includes: a purge mechanism 6, which is connected to the raw coal bin 1. After the unloading is completed, the purge mechanism 6 is used to purge the coal residue inside the raw coal bin 1 and the feeding bin 2 so that it can be discharged from the unloading pipe 3. In this way, it is convenient to empty the raw coal bin 1 and avoid waste.

[0037] In some embodiments, the purging mechanism 6 includes a fixing plate 61, an air pump 62 and an air blowing pipe 63, wherein the fixing plate 61 is fixed to the side wall of the raw coal bin 1, the air pump 62 is arranged on the fixing plate 61, and the air blowing pipe 63 is arranged inside the raw coal bin 1 and connected to the air outlet of the air pump 62. Specifically, the air pump 62 is fixed to the outer wall of the raw coal bin 1 through the fixing plate 61, and the air outlet of the air pump 62 extends into the raw coal bin 1 and is connected to the air blowing pipe 63. After the discharge is completed, by starting the air pump 62, the air pump 62 can form compressed air and blow it into the raw coal bin 1 through the air blowing pipe 63 to achieve purging.

[0038] In some embodiments, the blowing pipe 63 may be annular, and a plurality of nozzles may be evenly distributed along the circumference at the bottom of the blowing pipe 63. This arrangement enables the compressed air to be evenly blown into the raw coal bunker 1, which is beneficial to improving the blowing effect.

[0039] In some embodiments, the purging mechanism 6 may further include an air suction pipe 64 and a filter element 65, wherein the air suction pipe 64 is connected to the air inlet of the air pump 62, and the filter element 65 is disposed in the air suction pipe 64. Specifically, the filter element 65 is disposed at the air inlet of the air pump 62 through the air suction pipe 64. During the purging process, the filter element 65 can filter the gas entering the air pump 62, thereby preventing impurities (such as water vapor, dust, etc.) from entering the raw coal bin 1.

[0040] In some embodiments, the unloading device further includes: a closing mechanism 7, which is arranged on the raw coal bin 1 for closing the first feed port 11. Specifically, the closing mechanism 7 may include a cover plate 71 and an opening and closing assembly 72, and the cover plate 71 is connected to the raw coal bin 1 through the opening and closing assembly 72, and has a first state of opening the first feed port 11 and a second state of closing the first feed port 11. Specifically, during the discharge process, the cover plate 71 may be in the first state, which can facilitate the feeding of coal into the raw coal bin 1, that is, the raw coal bin 1 simultaneously feeds and discharges coal. After the discharge is completed, the cover plate 71 may be in the second state, which can avoid air leakage during purging and affect the purging effect.

[0041] In some embodiments, the cover plate 71 may be provided with a sealing plate 73, and the first feed port 11 may be sealed by the sealing plate 73. For example, the sealing plate 73 is provided on the inner side of the cover plate 71, and the sealing plate 73 is a rubber structure or a rubber structure is provided around the sealing plate 73. When the cover plate 71 is in the second state, the sealing plate 73 is pressed into the first feed port 11 to achieve sealing of the first feed port 11.

[0042] In some embodiments, the opening and closing assembly 72 may include a fixed frame 721 and an electric push rod 722, wherein the fixed frame 721 is disposed on the raw coal bin 1, the electric push rod 722 is disposed on the fixed frame 721 and connected to the cover plate 71, and the electric push rod 722 is used to drive the cover plate 71 to rise and fall for state conversion. Specifically, the fixed frame 721 is disposed on the top of the raw coal bin 1, the electric push rod 722 is mounted on the fixed frame 721, and the telescopic end of the electric push rod 722 is connected to the cover plate 71. During use, by starting the electric push rod 722, the electric push rod 722 can drive the telescopic end to extend and retract to achieve the lifting and lowering of the cover plate 71.

[0043] The unloading device for the raw coal bunker 1 of the embodiment of the present application can crush the coal entering the raw coal bunker 1 before the coal is discharged from the raw coal bunker 1, thereby preventing the coal from being blocked at the unloading port (first unloading port 12) due to different sizes, thereby reducing or stopping the unloading speed of the raw coal bunker 1. After the coal is discharged from the raw coal bunker 1, the spiral shaft 5 can realize the spiral conveying of the coal into the unloading pipe 3 through spiral motion, and the spiral shaft 5 can also perform secondary crushing on large pieces of coal during the process of conveying the coal, thereby preventing the coal from being blocked at the unloading pipe 3, thereby reducing or stopping the unloading speed of the raw coal bunker 1.

[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 feeding device for a raw coal bunker, the raw coal bunker having a first feeding port at the upper end and a first discharging port at the lower end, characterized in that: The feeding device includes: a feeding bin, a feeding pipe, a stirring mechanism and a screw shaft; the feeding bin has a second feeding port located at the upper end and a second discharging port located at the lower end, the second feeding port is located below the first discharging port and is connected to the first discharging port, and the second discharging port is connected to the feeding pipe; the stirring mechanism is arranged in the raw coal bin, and is used for crushing the coal entering the raw coal bin; the screw shaft is arranged in the feeding bin, and is used for driving the coal entering the feeding bin to be discharged through the feeding pipe.

2. The unloading device for raw coal bunker according to claim 1, characterized in that: The stirring mechanism comprises a motor, a rotating shaft and a stirring rod. The motor is arranged on the top of the raw coal bin, the rotating shaft is arranged in the raw coal bin and connected to the driving shaft of the motor, and the stirring rod is arranged on the rotating shaft.

3. The unloading device for raw coal bunker according to claim 2, characterized in that: The rotating shaft is connected to the screw shaft, and the rotating shaft transmits torque to the screw shaft to make it rotate circumferentially.

4. The unloading device for raw coal bunker according to claim 1, characterized in that: A flow guiding structure is arranged in the feeding bin, and the flow guiding structure is arranged around the second discharge port and is used to make the coal gather toward the second discharge port under the action of gravity.

5. The unloading device for raw coal bunker according to claim 1, characterized in that: The unloading device further comprises: a purge mechanism, which is connected to the raw coal bin and is used for purging the coal residue inside the raw coal bin and the feeding bin so that the coal residue is discharged from the unloading pipe.

6. The unloading device for raw coal bunker according to claim 5, characterized in that: The purging mechanism includes a fixed plate, an air pump and an air blowing pipe, wherein the fixed plate is fixed to the side wall of the raw coal bin, the air pump is arranged on the fixed plate, and the air blowing pipe is arranged inside the raw coal bin and connected to the air outlet of the air pump.

7. The unloading device for raw coal bunker according to claim 6, characterized in that: The air blowing pipe is annular, and a plurality of nozzles are evenly distributed along the circumferential direction at the bottom of the air blowing pipe.

8. The unloading device for raw coal bunker according to claim 6, characterized in that: The purge mechanism also includes an air intake pipe and a filter element. The air intake pipe is connected to the air inlet of the air pump, and the filter element is arranged in the air intake pipe.

9. The unloading device for raw coal bunker according to claim 5, characterized in that: The raw coal bin is provided with a cover plate and an opening and closing assembly. The cover plate is connected to the raw coal bin through the opening and closing assembly and has a first state of opening the first feed port and a second state of closing the first feed port.

10. The unloading device for raw coal bunker according to claim 9, characterized in that: The opening and closing assembly includes a fixing frame and an electric push rod. The fixing frame is arranged on the raw coal bin. The electric push rod is arranged on the fixing frame and connected to the cover plate. The electric push rod is used to drive the cover plate to rise and fall for state conversion.

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