Coal bunker loosening device

Abstract

The invention relates to the technical field of loosening equipment, in particular to a coal bunker loosening device. The coal bunker loosening device comprises a vertical rod used for being arranged in a coal bunker; the auxiliary rods are arranged on the vertical rod and distributed in the circumferential direction and the axial direction of the vertical rod at intervals; the driving mechanism is connected to the vertical rod and used for transmitting torque to the vertical rod to enable the vertical rod to rotate in the circumferential direction; wherein an included angle is formed between the axis of the auxiliary rod and the axis of the vertical rod, and the auxiliary rod is arranged to be capable of stretching out and drawing back in the axial direction so as to adjust the length of the auxiliary rod. According to the coal bunker loosening device, coal in a coal bunker is loosened in a stirring mode so that the coal can fall down from the discharging port of the coal bunker, and the problem that an existing blockage clearing mode is poor in effect on the condition of large-scale or serious blockage can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of loosening equipment, and in particular to a coal bunker loosening device. Background Art

[0002] Although the raw coal bunker system of a coal-fired power plant is an auxiliary machine, it is the first checkpoint of the entire coal-fired power plant system. If the raw coal bunker is blocked, it will cause risks such as load fluctuations, deteriorating combustion, and boiler fire extinguishing.

[0003] The existing common clearing methods for this phenomenon are mostly silo wall knocking and pneumatic blowing. Silo wall knocking technology does not require complex equipment and technical support, does not require the purchase of expensive professional equipment, and has relatively low maintenance costs. However, excessive knocking may damage the silo wall and shorten the service life of the equipment, so it is not effective for large-scale or severe blockages. Pneumatic blowing technology can quickly remove most types of blockages, but it requires special gas tanks and purge valves. Due to space and cost constraints, the gas tank will not be designed too large, which will affect the air force, so it is also not effective for large-scale or severe blockages. Summary of the invention

[0004] The embodiments of the present application at least provide a coal bunker loosening device, which uses stirring to loosen the coal in the coal bunker so that the coal can fall from the discharge port of the coal bunker, which can improve the problem that the existing blockage clearing methods are not effective for large-scale or serious blockages.

[0005] The present application provides a coal bunker loosening device, the device comprising:

[0006] A vertical pole, used to be arranged in the coal bunker;

[0007] A plurality of auxiliary rods are arranged on the vertical rod and are distributed at intervals along the circumference and axial direction of the vertical rod;

[0008] A driving mechanism, connected to the vertical rod and used to transmit torque to the vertical rod to make it rotate circumferentially;

[0009] Wherein, the axis of the auxiliary rod and the axis of the vertical rod have an included angle, and the auxiliary rod is configured to be axially retractable to adjust its own length.

[0010] In an optional embodiment, the angle between the axis of the secondary rod and the axis of the vertical rod is 90°.

[0011] In an optional embodiment, the axial direction of the secondary rod coincides with the radial direction of the vertical rod.

[0012] In an optional embodiment, the auxiliary rod has a first end connected to the vertical rod and a second end away from the vertical rod, and the auxiliary rod can be telescoped in an extension direction of the second end.

[0013] In an optional embodiment, the auxiliary rod has a contracted state and an extended state. When the coal moisture is less than the humidity threshold, the auxiliary rod loosens the coal in the contracted state. When the coal moisture is not less than the humidity threshold, the auxiliary rod loosens the coal in the extended state.

[0014] In an optional embodiment, in the contracted state, the extended length of the auxiliary rod is zero; in the extended state, the telescopic end of the auxiliary rod abuts against the inner wall of the coal bin.

[0015] In an optional embodiment, along the axial direction of the vertical rod, the extension lengths of the plurality of auxiliary rods in the extended state are different.

[0016] In an optional embodiment, along the axial direction of the vertical rod, the plurality of secondary rods are tapered in the extended state.

[0017] In an optional embodiment, the driving mechanism has a first output torque and a second output torque, the first output torque is smaller than the second output torque, and when the auxiliary rod is loosened in the contracted state, the driving mechanism transmits the first output torque to the vertical rod, and when the auxiliary rod is loosened in the extended state, the driving mechanism transmits the second output torque to the vertical rod.

[0018] In an optional embodiment, the coal bunker loosening device further includes:

[0019] The controller is respectively connected to the plurality of auxiliary rods and the driving mechanism for communication, and is configured to control the plurality of auxiliary rods and the driving mechanism.

[0020] The above technical solution of the present application has the following beneficial technical effects:

[0021] The coal bunker loosening device of the embodiment of the present application, whose vertical rod and auxiliary rod constitute a stirring mechanism, enables the device to loosen the coal in the coal bunker by stirring, so that the coal can fall from the discharge port of the coal bunker, thereby improving the problem that the existing blockage clearing method is not effective for large-scale or serious blockages. In addition, since the auxiliary rod can be retracted, the device can adjust the stirring radius by changing the length of the auxiliary rod to achieve local loosening and comprehensive loosening, thereby being suitable for different coal blockage situations.

[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 coal bunker loosening device provided in an embodiment of the present application is shown;

[0025] Figure 2 Shows Figure 1 Schematic diagram of the structure of the middle auxiliary rod;

[0026] Figure 3 Shows Figure 1 Schematic diagram of the middle auxiliary rod in the retracted state;

[0027] Figure 4 Shows Figure 1 Schematic diagram of the middle auxiliary rod in the extended state;

[0028] Reference numerals:

[0029] 10. Coal bunker; 11. Discharge port; 20. Coal bunker loosening device; 21. Vertical rod; 22. Auxiliary rod; 22a. First end; 22b. Second end. DETAILED DESCRIPTION

[0030] Although the raw coal bunker system of a coal-fired power plant is an auxiliary machine, it is the first checkpoint of the entire coal-fired power plant system. If the raw coal bunker is blocked, it will cause risks such as load fluctuations, deteriorating combustion, and boiler fire extinguishing.

[0031] The existing common clearing methods for this phenomenon are mostly silo wall knocking and pneumatic blowing. Silo wall knocking technology does not require complex equipment and technical support, does not require the purchase of expensive professional equipment, and has relatively low maintenance costs. However, excessive knocking may damage the silo wall and shorten the service life of the equipment, so it is not effective for large-scale or severe blockages. Pneumatic blowing technology can quickly remove most types of blockages, but it requires special gas tanks and purge valves. Due to space and cost constraints, the gas tank will not be designed too large, which will affect the air force, so it is also not effective for large-scale or severe blockages.

[0032] To this end, an embodiment of the present application provides a coal bunker loosening device, which uses stirring to loosen the coal in the coal bunker so that the coal can fall from the discharge port of the coal bunker, which can improve the problem that the existing clearing method is not effective for larger-scale or severe blockages.

[0033] refer to Figures 1 to 3 The coal bunker 10 loosening device provided in the embodiment of the present application includes: a vertical rod 21, a plurality of auxiliary rods 22 and a driving mechanism (not shown in the figure). The vertical rod 21 is used to be arranged in the coal bunker 10, and the vertical rod 21 extends upward from the discharge port 11 of the coal bunker 10, and the vertical rod 21 is configured to be able to rotate circumferentially under the action of torque. The auxiliary rod 22 is arranged on the vertical rod 21, and the axis of the auxiliary rod 22 has an angle with the axis of the vertical rod 21, and the auxiliary rod 22 is distributed at intervals along the circumference and axial direction of the vertical rod 21. The driving mechanism can be a motor, and the driving mechanism is connected to the vertical rod 21, and the driving mechanism can transmit torque to the vertical rod 21 to make the vertical rod 21 rotate circumferentially.

[0034] Specifically, the vertical rod 21 and the auxiliary rod 22 of the device constitute a stirring mechanism, so that the device can loosen the coal in the coal bunker 10 by stirring, so that the coal can fall from the discharge port 11 of the coal bunker 10. Compared with the methods of knocking on the bunker wall and pneumatic blowing in the prior art, the device directly acts on the coal, and its loosening effect is not affected by space, cost and the life of the coal bunker 10, thereby improving the problem that the existing clearing methods are not effective for large-scale or serious blockages.

[0035] In some embodiments, the angle between the axis of the auxiliary rod 22 and the axis of the vertical rod 21 is 90°. That is, the auxiliary rod 22 and the vertical rod 21 are perpendicular to each other. In specific settings, the auxiliary rod 22 can be connected to the vertical rod 21 to form a cross structure, or the auxiliary rod 22 can be connected to the vertical rod 21 to form a T-shaped structure. Of course, in other embodiments, the angle between the axis of the auxiliary rod 22 and the axis of the vertical rod 21 can also be other angles, such as 45°, 60°, 75°, etc.

[0036] In some embodiments, the axial direction of the auxiliary rod 22 coincides with the radial direction of the vertical rod 21. That is, the auxiliary rod 22 is arranged along the radial direction of the vertical rod 21. In specific arrangement, the auxiliary rod 22 can be connected to the side of the vertical rod 21 along the radial direction of the vertical rod 21, or the auxiliary rod 22 can be arranged through the vertical rod 21 along the radial direction of the vertical rod 21.

[0037] In some embodiments, the auxiliary rod 22 is configured to be able to axially extend and retract to adjust its own length. With this configuration, the stirring radius can be adjusted by changing the length of the auxiliary rod 22 to achieve local loosening and comprehensive loosening, thereby being suitable for different coal blockage situations. Specifically, when the coal blockage is relatively mild, the stirring mechanism only loosens a part of the coal bin 10 (discharge port 11) to ensure that the coal falls from the discharge port 11. Therefore, in this case, the auxiliary rod 22 can maintain a smaller telescopic length, that is, the stirring mechanism maintains a smaller stirring radius. When the coal blockage is more serious, the stirring mechanism needs to expand the loosening range to ensure that the coal falls from the discharge port 11. Therefore, in this case, the auxiliary rod 22 needs to maintain a larger telescopic length.

[0038] In some embodiments, the secondary rod 22 can be retracted at only one end. Figure 2 As shown, the auxiliary rod 22 has a first end 22a connected to the vertical rod 21 (side) and a second end 22b away from the vertical rod 21, and the auxiliary rod 22 can be extended in the extension direction of the second end 22b. Of course, in other embodiments, the auxiliary rod 22 can also be extended at both ends at the same time.

[0039] In some embodiments, the auxiliary rod 22 has a contracted (non-stretched) state and an extended state. When the humidity of the coal is less than the humidity threshold, the auxiliary rod 22 is loosened in the contracted state. When the humidity of the coal is not less than the humidity threshold, the auxiliary rod 22 is loosened in the extended state. For example, in the process of the coal bunker 10 conveying low-humidity coal (such as stone coal, Shen mixed coal, etc.), the coal blocking of such coal is relatively mild, so the auxiliary rod 22 can be loosened in the contracted state. In the process of the coal bunker 10 conveying high-humidity coal (such as Indonesian coal, etc.), the coal blocking of such coal is relatively serious, so the auxiliary rod 22 can be loosened in the extended state.

[0040] In some embodiments, in the extended state, the telescopic end of the auxiliary rod 22 is against the inner wall of the coal bunker 10. This arrangement enables the stirring mechanism to achieve rotary wall scraping during stirring, so as to effectively inhibit coal from adhering to the wall surface, ensure that the coal blocking structure of the coal bunker 10 is peeled off and broken from the initial stage, and prevent coal from adhering to the wall and blocking from the source. Of course, in other embodiments, the auxiliary rod 22 can also be other lengths in the extended state, such as a gap of 10mm, 20mm or 30mm in width between the telescopic end of the auxiliary rod 22 and the inner wall of the coal bunker 10.

[0041] In some embodiments, the extension lengths of the plurality of auxiliary rods 22 in the extended state are different along the axial direction of the vertical rod 21. For example, the inner wall of the coal bunker 10 near the discharge port 11 is tapered, and in order to make each auxiliary rod 22 abut against the inner wall of the coal bunker 10, the plurality of auxiliary rods 22 may be tapered along the axial direction of the vertical rod 21 when in the extended state.

[0042] In an optional embodiment, the driving mechanism has a first output torque and a second output torque, and the first output torque is less than the second output torque. When the auxiliary rod 22 is loosened in a contracted state, the driving mechanism transmits the first output torque to the vertical rod 21. When the auxiliary rod 22 is loosened in an extended state, the driving mechanism transmits the second output torque to the vertical rod 21. This arrangement can overcome the resistance increased by the increase in the stirring radius, so that the stirring mechanism can maintain an appropriate speed. Specifically, when the auxiliary rod 22 is loosened in an extended state, the stirring radius increases. As the stirring radius increases, the area swept by the auxiliary rod 22 also increases, resulting in a corresponding increase in the resistance of the coal to the auxiliary rod 22. Therefore, in order to overcome the increased resistance, the torque transmitted to the vertical rod 21 by the driving mechanism should be increased, that is, the first output torque is replaced by the second output torque. It should be understood that in a specific implementation, the stirring speed of the stirring mechanism in different use environments (such as the coal bunker 10 conveying low-humidity coal and conveying high-humidity coal) can be the same, and both are low-speed rotation.

[0043] In an optional embodiment, the loosening device of the coal bunker 10 further includes a controller (not shown in the figure), which is respectively connected to the plurality of auxiliary rods 22 and the driving mechanism in communication, and is configured to be able to control the plurality of auxiliary rods 22 and the driving mechanism. Specifically, the controller is used to control the extension length of the plurality of auxiliary rods 22 and the output torque of the driving mechanism. For example, in the process of the coal bunker 10 conveying low-humidity coal (such as anthracite coal, mixed coal, etc.), the controller controls the auxiliary rod 22 to loosen in a contracted state, and in the process of the coal bunker 10 conveying high-humidity coal (such as Indonesian coal, etc.), the controller controls the auxiliary rod 22 to loosen in an extended state. For another example, when the auxiliary rod 22 is loosened in a contracted state, the controller controls the driving mechanism to transmit a first output torque to the riser, and when the auxiliary rod 22 is loosened in an extended state, the controller controls the driving mechanism to transmit a second output torque to the riser.

[0044] The coal bunker 10 loosening device of the embodiment of the present application, its vertical rod 21 and auxiliary rod 22 constitute a stirring mechanism, so that the device loosens the coal in the coal bunker 10 by stirring, so that the coal can fall from the discharge port 11 of the coal bunker 10. Compared with the methods of knocking on the bunker wall and pneumatic blowing in the prior art, the device directly acts on the coal, and its loosening effect is not affected by space, cost and the life of the coal bunker 10, thereby improving the problem that the existing clearing method is not effective for large-scale or serious blockages. In addition, since the auxiliary rod 22 can be retracted, the device can adjust the stirring radius by changing the length of the auxiliary rod 22 to achieve local loosening and comprehensive loosening, so as to be suitable for different coal blockage situations.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 coal bunker loosening device, used to loosen the coal in the coal bunker so that the coal can fall from the coal bunker discharge port, characterized in that: The device comprises: A vertical pole, used to be arranged in the coal bunker; A plurality of auxiliary rods are arranged on the vertical rod and are distributed at intervals along the circumference and axial direction of the vertical rod; A driving mechanism, connected to the vertical rod and used to transmit torque to the vertical rod to make it rotate circumferentially; Wherein, the axis of the auxiliary rod and the axis of the vertical rod have an included angle, and the auxiliary rod is configured to be axially retractable to adjust its own length.

2. The coal bunker loosening device according to claim 1, characterized in that: The included angle between the axis of the auxiliary rod and the axis of the vertical rod is 90°.

3. The coal bunker loosening device according to claim 2, characterized in that: The axial direction of the secondary rod coincides with the radial direction of the vertical rod.

4. The coal bunker loosening device according to claim 1, characterized in that: The auxiliary rod has a first end connected to the vertical rod and a second end away from the vertical rod, and the auxiliary rod can be telescoped toward the extension direction of the second end.

5. The coal bunker loosening device according to claim 1, characterized in that: The auxiliary rod has a contracted state and an extended state. When the moisture of the coal is less than a moisture threshold, the auxiliary rod loosens the coal in the contracted state. When the moisture of the coal is not less than the moisture threshold, the auxiliary rod loosens the coal in the extended state.

6. The coal bunker loosening device according to claim 5, characterized in that: In the contracted state, the extended length of the auxiliary rod is zero; in the extended state, the telescopic end of the auxiliary rod abuts against the inner wall of the coal bin.

7. The coal bunker loosening device according to claim 6, characterized in that: Along the axial direction of the vertical rod, the extension lengths of the plurality of auxiliary rods in the extended state are different.

8. The coal bunker loosening device according to claim 7, characterized in that: Along the axial direction of the vertical rod, the plurality of secondary rods are tapered in the extended state.

9. The coal bunker loosening device according to claim 5, characterized in that: The driving mechanism has a first output torque and a second output torque, the first output torque is smaller than the second output torque, and when the auxiliary rod is loosened in the contracted state, the driving mechanism transmits the first output torque to the vertical rod, and when the auxiliary rod is loosened in the extended state, the driving mechanism transmits the second output torque to the vertical rod.

10. The coal bunker loosening device according to claim 1, characterized in that: The device also includes: The controller is respectively connected to the plurality of auxiliary rods and the driving mechanism for communication, and is configured to control the plurality of auxiliary rods and the driving mechanism.

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