Coal dropping barrel blockage removing device based on scraping plate cleaning and using method of coal dropping barrel blockage removing device based on scraping plate cleaning

Abstract

The invention relates to the technical field of coal dropping barrel blockage clearing, in particular to a coal dropping barrel blockage clearing device based on scraper cleaning and a using method, and the coal dropping barrel blockage clearing device comprises a scraper with the capacity of recovering from a deformation state to a preset shape within a preset temperature range; the scraper blade can be shaped to adapt to the inner wall of the coal falling barrel when being at a first threshold temperature, and can automatically recover to a preset shape when being at a second threshold temperature, and the first threshold temperature is higher than the second threshold temperature; and the driving mechanism transmits power to the scraping plate, so that the scraping plate can rotate in the coal falling barrel. The scraper blade has the beneficial effects that the shape memory alloy is used as the scraper blade material, so that the scraper blade can automatically adjust the shape according to the temperature change, the scraper blade can be better attached to the inner wall of the coal falling barrel, and the cleaning efficiency is improved. By means of the self-adaptability, the cleaning effect is improved, the requirement for manual adjustment is reduced, and the operation convenience and the automation degree are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal drop chute blockage clearing, in particular to a coal drop chute blockage clearing device based on scraper cleaning and a use method thereof. Background Art

[0002] In thermal power generation, the raw coal bunker is a crucial facility for storing coal. The smooth delivery of coal from the bunker to the feeder is directly related to the boiler's combustion efficiency and the overall operational status of the power plant. However, in actual operation, due to factors such as high humidity or fine coal quality, coal can easily cling to the wall of the chute between the raw coal bunker and the feeder, leading to coal blockage. This blockage not only interrupts the feeder's coal supply, affecting the normal output of the boiler, but can also threaten the safe and stable operation of the entire power generation system.

[0003] To address this coal blockage issue, the industry currently relies on manual intervention. This involves stopping the coal feeder when a blockage is detected, and requiring personnel to manually remove the coal from the wall. This method is not only time-consuming and inefficient, but also poses safety risks. The interruption of the coal feeder also negatively impacts the boiler's immediate output.

[0004] To address this issue, some existing raw coal silos have begun using mechanical devices such as air cannons to assist in clearing coal blockages. Air cannons use a sudden release of compressed air, generating a powerful shock wave to loosen and remove coal clinging to the wall. While this method offers certain advantages over traditional manual handling methods, such as ease of operation and rapid response, its effectiveness remains limited when dealing with certain types of coal blockages (such as very sticky or hard coal), and manual cleaning is sometimes still required to completely resolve the problem. Summary of the Invention

[0005] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0006] The purpose of the present invention is to provide a coal chute blockage clearing device based on scraper cleaning.

[0007] Therefore, its purpose is to solve the problem that the dredging effect is still limited and sometimes still needs to be combined with manual cleaning to be completely solved.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a coal chute clearing device based on scraper cleaning, which includes a scraper with the ability to recover from a deformed state to a preset shape within a predetermined temperature range; the scraper can be shaped to adapt to the inner wall of the coal chute when it is at a first threshold temperature, and can automatically recover to the preset shape when it is at a second threshold temperature, wherein the first threshold temperature is higher than the second threshold temperature; a driving mechanism, which transmits power to the scraper so that the scraper can rotate in the coal chute; and repair capsules, which are evenly distributed on the scraper.

[0009] As a preferred solution of the scraper-based coal chute blockage clearing device of the present invention, the driving mechanism includes an external motor and a transmission rod, and the external motor transmits power to the scraper through the transmission rod.

[0010] As a preferred solution of the coal chute blockage clearing device based on scraper cleaning of the present invention, a gear is fixed on the transmission rod, and the gear is engaged with an external motor to realize power transmission.

[0011] As a preferred solution of the coal chute blockage clearing device based on scraper cleaning of the present invention, the scraper is provided in plurality, and the plurality of scrapers are symmetrically fixed on the transmission rod.

[0012] As a preferred solution of the coal chute clearing device based on scraper cleaning of the present invention, wear-resistant plates are fixed at both ends of the scraper, and the wear-resistant plates are made of stainless steel or polymer composite materials.

[0013] As a preferred solution of the scraper-based coal chute clearing device of the present invention, the repair agent of the repair capsule is selected from epoxy resin, polyurethane or silicone material.

[0014] As a preferred solution of the scraper-based coal chute blockage clearing device of the present invention, the outer surface of the scraper is covered with a protective coating, wherein the protective coating is prepared by spraying or dipping, and the thickness is controlled between 0.1 mm and 1 mm.

[0015] As a preferred solution of the scraper-based coal chute blockage clearing device of the present invention, the temperature regulating unit is used to control the temperature of the environment around the scraper so that the scraper can be in a deformed state or a restored state as needed.

[0016] As a preferred solution of the scraper-based coal chute blockage clearing device of the present invention, the temperature regulating unit includes a heating element and a temperature sensor, and the working temperature of the scraper is accurately controlled through a feedback control system.

[0017] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for using a coal chute clearing device based on scraper cleaning, comprising a coal chute clearing device based on scraper cleaning, and,

[0018] Start the temperature adjustment unit to the heating mode, and use electric heating, hot air or hot water to heat the scraper until its temperature reaches the preset first threshold temperature; use the heated scraper to make it fit better with the inner wall of the coal chute; turn on the external motor, and transmit power to the transmission rod through the gear transmission system, driving the multiple scrapers installed on it to rotate synchronously; make the rotating scraper in close contact with the inner wall of the coal chute, and remove the coal residue accumulated on the inner wall through physical friction.

[0019] The beneficial effect of this invention is that the scraper uses shape memory alloy as the material, allowing the scraper to automatically adjust its shape according to temperature changes, thereby better fitting the inner wall of the coal drop hopper and improving cleaning efficiency. This adaptability not only improves cleaning results, but also reduces the need for manual adjustments, increasing the convenience and automation of operation.

[0020] Repair capsules are distributed on the scraper surface. When the scraper surface is damaged, the repair capsules will automatically rupture and release the repair agent, achieving local self-repair. This feature significantly extends the scraper's service life and reduces maintenance time and costs.

[0021] Multiple scrapers are symmetrically fixed on the transmission rod, ensuring that the scrapers can evenly cover the entire cross-section of the coal drop shaft when rotating, effectively removing coal accumulation at different locations and improving the comprehensiveness and thoroughness of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the top view structure of the present invention.

[0025] Figure 3 This is a schematic structural diagram of the scraper in the present invention at the first threshold temperature.

[0026] Figure 4 It is a schematic diagram of the partial three-dimensional structure of the scraper in the present invention.

[0027] Figure 5 This is a schematic diagram of materials entering the coal drop shaft in the present invention.

[0028] In the picture:

[0029] 100, scraper; 101, driving mechanism; 102, repair capsule; 103, transmission rod; 104, gear; 105, wear plate; 106, heating element;

[0030] 200. Coal chute. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] Example 1

[0035] Reference Figure 1-4 This is the first embodiment of the present invention, which provides a scraper-based coal chute clearing device. The device includes a scraper 100 capable of recovering from a deformed state to a preset shape within a predetermined temperature range. The scraper 100 is shaped to conform to the inner wall of the coal chute 200 at a first threshold temperature and automatically recovers to the preset shape at a second threshold temperature, wherein the first threshold temperature is higher than the second threshold temperature. The preset shape is designed to ensure that the scraper 100 closely adheres to the inner wall of the coal chute 200, thereby improving cleaning efficiency. A drive mechanism 101 transmits power to the scraper 101, enabling the scraper 100 to rotate within the coal chute 200, thereby removing accumulated coal from the inner wall of the coal chute 200 and ensuring unobstructed flow of the coal chute 200. Repair capsules 102 are evenly distributed on the scraper 100, with diameters ranging from 1 μm to 100 μm. When the scraper 100 is damaged, the repair capsules 102 release a repair agent to achieve self-repair.

[0036] In this embodiment, the shape memory alloy is a nickel-titanium alloy, and its phase transition temperature range is adjustable to adapt to different working environment conditions. The scraper 100 in this device is made of this material. When the ambient temperature reaches the first threshold temperature, the scraper 100 can be shaped to adapt to the shape of the inner wall of the coal drop chute 200; when the temperature drops to the second threshold temperature, the scraper 100 can automatically return to the preset shape to ensure a close fit with the inner wall of the coal drop chute 200. This design allows the scraper 100 to be adjusted according to the actual size and shape of the coal drop chute 200, which improves the cleaning effect while reducing wear and extending the service life. The drive mechanism 101 is responsible for converting the external power into the rotational motion of the scraper 100, and the rotation of the scraper 100 is used to remove the accumulated coal on the inner wall of the coal drop chute 200 to keep the channel unobstructed.

[0037] The repair capsules 102 have a diameter ranging from 1 μm to 100 μm and contain a repair agent that is evenly distributed on the surface of the scraper 100. When the scraper 100 is damaged during use, the repair capsules 102 in the damaged area rupture, releasing the repair agent, achieving localized self-repair, thereby restoring the working performance of the scraper 100 and reducing downtime for maintenance.

[0038] In yet another embodiment, the scraper 100 is made of a magnetic material to ensure that the scraper 100 is deformed under the control of the magnetic field. The current passing through the electromagnet changes the strength and direction of the magnetic field, causing the scraper 100 to begin to deform. During the rotation of the scraper 100, its edge is in close contact with the inner wall of the coal chute 200 to remove the accumulated coal. When encountering particularly stubborn coal accumulation or changes in the internal shape of the coal chute 200, the scraper 100 can be adjusted in angle or position by adjusting the direction and strength of the magnetic field to better adapt to the cleaning needs of different parts. For example, the scraper 100 can be brought closer to the inner wall of the coal chute 200 by increasing the strength of the magnetic field, or the scraper 100 can be moved along a specific path by changing the direction of the magnetic field.

[0039] The drive mechanism 101 includes an external motor and a transmission rod 103. The external motor transmits power to the scraper 100 via the transmission rod 103, enabling the scraper 100 to rotate between the inner wall of the coal drop shaft 200 and the burning coal, thereby removing coal deposits from the inner wall of the coal drop shaft 200 and ensuring unobstructed flow within the shaft 200. A gear 104 is fixed to the transmission rod 103, which meshes with the external motor to transmit power. Multiple scrapers 100 are provided, and these multiple scrapers 100 are symmetrically fixed to the transmission rod 103.

[0040] In this embodiment, the external motor converts electrical energy into mechanical energy to provide the necessary driving force for the entire system. A gear 104 is fixed to the transmission rod 103, and the gear 104 is engaged with the external motor to realize the transmission of power. This means that the gear 104 transmission method is adopted. This transmission method has the advantages of accurate transmission ratio and strong load-bearing capacity, and is very suitable for applications that require precise control of speed and torque. Scraper 100 The scraper 100 acts directly on the inside of the coal drop shaft 200, and removes the accumulated coal attached to its inner wall through a rotating action. In order to improve the cleaning effect, the scraper 100 is provided in multiple numbers and is symmetrically fixed on the transmission rod 103. This design can ensure that the scraper 100 can evenly cover the entire cross-section of the coal drop shaft 200 when rotating, and effectively remove the accumulated coal at different positions.

[0041] Specifically, when the external motor is activated, power is transmitted to the transmission rod 103 via the gear 104. The transmission rod 103 then drives the multiple scrapers 100 mounted thereon to rotate synchronously. Because the scrapers 100 are in close contact with the inner wall of the coal drop chute 200, they effectively scrape away any accumulated coal adhering to the inner wall during rotation. This prevents the coal drop chute 200 from becoming clogged due to excessive coal accumulation.

[0042] refer to Figure 5 A feed port for accommodating the entry of materials is provided on the side of the coal drop shaft 200, so the present invention can clean the materials while feeding them to prevent the materials from adhering to the inner wall to form coal accumulation.

[0043] Example 2

[0044] Reference Figure 1-4 , which is the second embodiment of the present invention, provides a coal chute clearing device based on scraper cleaning, and wear-resistant plates 105 are fixed at both ends of the scraper 100, and the wear-resistant plates 105 are made of stainless steel or polymer composite materials. The repair agent of the repair capsule 102 is selected from materials with fast curing properties such as epoxy resin, polyurethane or silicone, which can react chemically with the alloy surface to promote crack closure and restore the flatness of the scraper 100 surface. The outer surface of the scraper 100 is covered with a protective coating, wherein the protective coating is prepared by spraying or dipping, and the thickness is controlled between 0.1mm and 1mm. The protective coating has sufficient flexibility and adhesion to prevent the repair capsule 102 from rupturing prematurely during manufacturing and use, while not affecting the shape memory properties of the shape memory alloy.

[0045] In this embodiment, the scraper 100 is responsible for removing coal deposits from the inner wall of the coal drop chute 200. To increase its service life, wear-resistant plates 105 are fixed to both ends of the scraper 100. These wear-resistant plates 105 are made of stainless steel or polymer composite materials and can effectively resist wear during coal transportation, extending the service life of the equipment.

[0046] To address potential surface damage to the scraper 100 during long-term use, the device utilizes a repair agent containing repair capsules 102. These capsules 102 are filled with a fast-curing material, such as epoxy resin, polyurethane, or silicone. When cracks appear on the scraper 100 surface, the capsules 102 rupture, releasing the repair agent. Due to the fast-curing properties of this material, it quickly fills the crack and forms a new protective layer through a chemical reaction with the metal surface, sealing the crack and restoring surface smoothness. This process occurs automatically without external intervention, significantly enhancing the durability and reliability of the scraper 100.

[0047] To further enhance the durability and functionality of the scraper 100, its outer surface is covered with a protective coating. This coating is applied via spraying or dipping, with a thickness ranging from 0.1mm to 1mm. The protective coating must possess sufficient flexibility and adhesion to prevent premature rupture of the repair capsule 102 during manufacturing and use. This ensures that the scraper 100 can flexibly deform during operation, adapting to the varying shapes of the inner wall of the coal drop chute 200 and improving blockage removal effectiveness.

[0048] Example 3

[0049] Reference Figure 2-4 The third embodiment of the present invention provides a scraper-based coal chute blockage clearing device. The temperature control unit is used to control the temperature of the environment surrounding the scraper 100, allowing the scraper 100 to be deformed or restored as needed. The temperature control unit includes a heating element 106 (e.g., electric heating, hot air, or hot water) and a temperature sensor. The feedback control system precisely controls the operating temperature of the scraper 100.

[0050] In this embodiment, the core of the temperature regulating unit is to achieve the change of the shape of the scraper 100 by precisely controlling the temperature of the environment surrounding the scraper 100 and utilizing the thermal deformation characteristics of the material.

[0051] When the scraper 100 needs to deform to more closely conform to the cylinder wall and improve cleaning efficiency, the temperature control unit activates the heating mode. The heating element 106 (which can be an electric heater, hot air, or hot water) provides heat to the environment around the scraper 100 until the material reaches its transition temperature. At this temperature, the material undergoes a certain deformation, allowing the scraper 100 to better adapt to the shape of the cylinder wall, thereby enhancing cleaning effectiveness.

[0052] On the contrary, when the cleaning task is completed or the shape of the scraper 100 needs to be adjusted, the temperature adjustment unit will quickly reduce the temperature around the scraper 100 through natural cooling or other means (such as using cooling water). As the temperature drops, the scraper 100 material gradually returns to its original state, facilitating subsequent operation or maintenance.

[0053] The temperature adjustment unit can be electric heating, hot air or hot water. These heating methods have their own characteristics and are suitable for different application scenarios.

[0054] The temperature sensor is a key component in the entire temperature control system. It monitors the temperature of the scraper blade 100 in real time and feeds this data back to the control system. Based on this information, the control system can adjust the heating or cooling strategy to ensure that the temperature is always maintained within the set range.

[0055] A method for using a coal chute clearing device based on scraper cleaning, which starts the heating mode of the temperature regulating unit and heats the scraper 100 by means of electric heating, hot air or hot water to reach a first threshold temperature, thereby shaping it to adapt to the shape of the inner wall of the coal chute 200. The external motor is started, and the power is transmitted to the transmission rod 103 through the gear 104, thereby driving multiple symmetrically fixed scrapers 100 to rotate synchronously. The rotating scraper 100 is in close contact with the inner wall of the coal chute 200, and removes the accumulated coal on the inner wall through physical friction, keeping the channel unobstructed. During the rotation of the scraper 100, if the surface is damaged and the repair capsule 102 is broken, the repair agent will be automatically released, filling the cracks through the rapid curing characteristics, thereby increasing the service life of the scraper 100.

[0056] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of the function described herein, and is not only structurally equivalent but also equivalent structures. Without departing from the scope of the present invention, other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0057] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0058] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coal chute clearing device based on scraper cleaning, characterized by: include, The scraper (100) has the ability to recover from a deformed state to a preset shape within a predetermined temperature range; The scraper (100) can be shaped to adapt to the inner wall of the coal drop chute (200) when at a first threshold temperature, and can automatically return to a preset shape when at a second threshold temperature, wherein the first threshold temperature is higher than the second threshold temperature; A driving mechanism (101) transmits power to the scraper (100), enabling the scraper (100) to rotate in a coal dropping shaft (200); a feed port is provided on one side of the coal dropping shaft (200); A temperature regulating unit for controlling the temperature of the environment surrounding the scraper (100); Repair capsules (102), the repair capsules (102) are evenly distributed on the scraper (100).

2. The coal chute clearing device based on scraper cleaning according to claim 1, characterized in that: The driving mechanism (101) comprises an external motor and a transmission rod (103), and the external motor transmits power to the scraper (100) via the transmission rod (103).

3. The coal chute clearing device based on scraper cleaning according to claim 2, characterized in that: A gear (104) is fixed on the transmission rod (103), and the gear (104) is engaged with an external motor to realize power transmission.

4. The coal chute clearing device based on scraper cleaning according to claim 3, characterized in that: The scraper (100) is provided in plurality, and the plurality of scrapers (100) are symmetrically fixed on the transmission rod (103).

5. The coal chute clearing device based on scraper cleaning according to claim 4, characterized in that: Wear-resistant plates (105) are fixed at both ends of the scraper (100), and the wear-resistant plates (105) are made of stainless steel or a polymer composite material.

6. The coal chute clearing device based on scraper cleaning according to claim 1, characterized in that: The repair agent of the repair capsule (102) is selected from epoxy resin, polyurethane or silicone material.

7. The coal chute blockage clearing device based on scraper cleaning according to claim 6, characterized in that: The outer surface of the scraper (100) is covered with a protective coating, wherein the protective coating is prepared by a spray coating or dip coating process, and the thickness is controlled between 0.1 mm and 1 mm.

8. The coal chute clearing device based on scraper cleaning according to claim 1, characterized in that: The temperature regulating unit enables the scraper (100) to be in a deformed state or a restored state as required.

9. The coal chute blockage clearing device based on scraper cleaning according to claim 8, characterized in that: The temperature regulating unit comprises a heating element (106) and a temperature sensor, and accurately controls the working temperature of the scraper (100) through a feedback control system.

10. A method for using a coal chute clearing device based on scraper cleaning, characterized in that: The invention comprises a coal chute clearing device based on scraper cleaning as described in any one of claims 1 to 9, and activating the temperature regulating unit to a heating mode, heating the scraper blade by electric heating, hot air or hot water until the temperature thereof reaches a preset first threshold temperature; The heated scraper is used to better fit the inner wall of the coal chute; Turn on the external motor, which transmits power to the transmission rod through the gear transmission system, driving the multiple scrapers installed on it to rotate synchronously; The rotating scraper is brought into close contact with the inner wall of the coal dropping hopper, and the coal residue accumulated on the inner wall is removed through physical friction.

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