Discharging mechanism and low-load coal mill control device

Abstract

The utility model relates to the technical field of coal mills, in particular to a blanking mechanism and a low-load coal mill control device, which comprise an external component, a coal mill body, a bearing frame arranged at one end of the coal mill body, a conveying pipe arranged at one end of the bearing frame and a bearing cylinder arranged at one end of the conveying pipe, the material storage mechanism comprises a screening frame arranged in the bearing cylinder and a material storage cylinder arranged in the screening frame, and the material shaking mechanism comprises a connecting block arranged at one end of the screening frame, a shaking rod arranged at one end of the connecting block and a limiting disc arranged at one end of the shaking rod. The coal mill has the advantages that coal falls into the coal mill body successively through the holes in the surface of the screening frame, then the screening frame is driven by the material shaking mechanism to shake, and therefore the screening frame is prevented from being blocked, after falling coal blocks pass through the conveying pipe, the radial opening of coal falling is adjusted by rotating the discharging mechanism, and therefore the coal falling opening is prevented from being blocked; and the equipment is damaged.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and in particular to a feeding mechanism and a control device for a low-load coal mill. Background Technology

[0002] A low-load coal mill refers to coal milling equipment used in coal-fired power plants when the unit operates at a lower load. This type of mill is designed and operated to adapt to the specific needs of low-load conditions. Its adaptability lies in its ability to operate effectively under low unit loads, ensuring coal grinding quality and efficiency. Under low-load conditions, the mill may have lower energy consumption, helping to save electricity and reduce operating costs. During low-load operation, the mill needs to maintain stable coal grinding quality and combustion efficiency to avoid combustion instability caused by load changes.

[0003] If the feed inlet of the coal mill is full of coal during feeding, it may cause damage to the scraper of the annular air duct inside the coal mill or friction fire, which may require switching to standby equipment to continue working or stopping the mill for cleaning, thereby increasing the workload of maintenance and extending the maintenance time. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the above-mentioned technical problem of blockage at the feed inlet, this utility model is proposed.

[0006] The purpose of this utility model is to provide a feeding mechanism, which aims to solve the problem.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a feeding mechanism, comprising an external component including a coal mill body, a bearing frame disposed at one end of the coal mill body, a conveying pipe disposed at one end of the bearing frame, and a bearing cylinder disposed at one end of the conveying pipe; and,

[0008] The storage mechanism includes a screening frame disposed inside the bearing cylinder and a storage cylinder disposed inside the screening frame; and,

[0009] The material shaking mechanism includes a connecting block located at one end of the screening frame, a shaking rod located at one end of the connecting block, and a limiting plate located at one end of the shaking rod.

[0010] In a preferred embodiment of the feeding mechanism of this utility model, the external component further includes a feed inlet located above the bearing cylinder, and a connecting plate is provided inside the feed inlet.

[0011] As a preferred embodiment of the feeding mechanism of this utility model, the material storage mechanism further includes a bearing rod disposed above the material storage cylinder, the bearing rod being arranged in a circumferential array above the material storage cylinder, a top cover being disposed above the bearing rod, a driving component being disposed below the connecting plate, and the driving component being connected to the top cover.

[0012] As a preferred embodiment of the feeding mechanism of this utility model, the shaking mechanism further includes a connecting cylinder sleeved on the outside of the shaking rod, the connecting cylinder is provided with an elastic element, the elastic element is a return spring, and the connecting blocks are arranged circumferentially on the outside of the screening frame.

[0013] In a preferred embodiment of the feeding mechanism of this utility model, a second linkage rod is provided below the bearing cylinder, an operating disc is provided at one end of the second linkage rod, the second linkage rod is arranged in a circumferential array outside the operating disc, a fixed disc is provided above the operating disc, an operating rod is provided outside the fixed disc, a first linkage rod is provided below the operating rod, and the operating rod is arranged in a circumferential array outside the fixed disc.

[0014] In a preferred embodiment of the feeding mechanism of this utility model, the first linkage rod is inclined, and the operating disc is triangular.

[0015] In a preferred embodiment of the feeding mechanism of this utility model, the operating rod is connected to the connecting cylinder.

[0016] The beneficial effects of the feeding mechanism of this utility model are as follows: coal is continuously fed into the coal mill body through the holes on the surface of the screening frame. During the falling process, the screening frame is shaken by the shaking mechanism to prevent the screening frame from being blocked. After the coal blocks fall through the conveying pipe, the diameter of the coal drop opening is adjusted by rotating the feeding mechanism to prevent the coal drop opening from being blocked and causing damage to the equipment.

[0017] Another objective of this invention is to provide a control device for a low-load coal mill, which aims to solve the problem.

[0018] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a low-load coal mill control device, which includes a feeding mechanism; and the feeding mechanism includes a bearing plate disposed inside the conveying pipe, an extension frame disposed outside the bearing plate, and a through groove opened inside the extension frame.

[0019] As a preferred embodiment of the low-load coal mill control device of this utility model, the feeding mechanism further includes a sliding rod disposed inside the extension frame, a linkage block is provided on the outer side of the sliding rod, and a triangular plate is provided at one end of the linkage block.

[0020] As a preferred embodiment of the low-load coal mill control device of this utility model, the extension frame is arranged in a circumferential array on the outside of the bearing plate.

[0021] The beneficial effects of the low-load coal mill control device of this utility model are as follows: the bearing plate drives the extension frame to rotate, the extension frame drives the sliding rod to move along the preset track inside the extension frame, so that the sliding rod moves outward, and then the sliding rod drives the linkage block and the triangular plate to move outward, thereby adjusting the size of the aperture and thus controlling the amount of coal falling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a diagram showing the overall structure of this utility model.

[0024] Figure 2 This is a cross-sectional view of the bearing cylinder in this utility model.

[0025] Figure 3 This is a diagram illustrating the material storage mechanism and the material shaking mechanism of this utility model.

[0026] Figure 4 This is a diagram illustrating the feeding mechanism of this utility model. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide 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 can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "an embodiment" or "embodiment" as used 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 different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0030] Example 1

[0031] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a feeding mechanism, including an external component 100, comprising a coal mill body 101, a support frame 101a disposed at one end of the coal mill body 101, a conveying pipe 101a-1 disposed at one end of the support frame 101a, and a support cylinder 102 disposed at one end of the conveying pipe 101a-1; and,

[0032] The storage mechanism 200 includes a screening frame 201 disposed inside the bearing cylinder 102 and a storage cylinder 202 disposed inside the screening frame 201; and,

[0033] The shaking mechanism 300 includes a connecting block 301 located at one end of the screening frame 201, a shaking rod 301a located at one end of the connecting block 301, and a limiting disk 301a-1 located at one end of the shaking rod 301a.

[0034] The external component 100 also includes a feed inlet 102b located above the support cylinder 102, and a connecting plate 102a is provided inside the feed inlet 102b.

[0035] Operating procedure: First, coal is fed into the bearing cylinder 102 through the feed inlet 102b. After entering the bearing cylinder 102, the coal is blocked by the screening frame 201. The coal then falls into the coal mill body 101 through the holes on the surface of the screening frame 201. During the falling process, the screening frame 201 is shaken by the shaking mechanism 300 to prevent the screening frame 201 from clogging. After the coal passes through the conveying pipe 101a-1, the diameter of the coal discharge port is adjusted by rotating the feeding mechanism 400 to prevent the coal discharge port from clogging and causing damage to the equipment.

[0036] Example 2

[0037] Reference Figures 1-4 This is the second embodiment of the present invention. Unlike the previous embodiment, it also includes a support rod 202a disposed above the storage cylinder 202. The support rod 202a is arranged in a circumferential array above the storage cylinder 202. A top cover 202a-1 is provided above the support rod 202a. A driving member 203 is provided below the connecting plate 102a. The driving member 203 is connected to the top cover 202a-1.

[0038] The shaking mechanism 300 also includes a connecting cylinder 302 sleeved on the outside of the shaking rod 301a. The connecting cylinder 302 has an elastic element 302a inside, which is a return spring. The connecting block 301 is arranged in a circumferential array on the outside of the screening frame 201.

[0039] A second linkage rod 304a is provided below the bearing cylinder 102. One end of the second linkage rod 304a is provided with an operating disc 304. The second linkage rod 304a is arranged circumferentially outside the operating disc 304. A fixed disc 305 is provided above the operating disc 304. An operating rod 303 is provided outside the fixed disc 305. A first linkage rod 303a is provided below the operating rod 303. The operating rod 303 is arranged circumferentially outside the fixed disc 305. The first linkage rod 303a is inclined, and the operating disc 304 is triangular. The operating lever 303 is connected to the connecting cylinder 302. When a coal block that is too large falls and cannot pass through the holes on the surface of the screening frame 201, the coal block will slide to the center of the screening frame 201. At this time, the driving component 203 is driven, which drives the top cover 202a-1, the bearing rod 202a and the storage cylinder 202 to move down. After moving down to a certain distance, the larger coal block falls into the storage cylinder 202 through the holes reserved between the bearing rods 202a, and finally falls into the equipment through the storage cylinder 202, thereby preventing the larger coal block from causing blockage of the feed inlet.

[0040] Operating Procedure: When coal blocks pass through the screening frame 201, they fall evenly through the holes on the surface of the screening frame 201. The motor drives the fixed disk 305 to rotate, which in turn drives the operating rod 303 and the first linkage rod 303a to rotate. When the first linkage rod 303a rotates to a certain distance, it contacts the second linkage rod 304a. The inclined surfaces of the first linkage rod 303a and the second linkage rod 304a cause the first linkage rod 303a and the operating rod 303 to rise. Once they move away from the second linkage rod 304a... The first linkage rod 303a and the operating rod 303 will descend, thereby realizing the reciprocating rise and fall of the operating rod 303 and the first linkage rod 303a. When the first linkage rod 303a and the operating rod 303 reciprocate to rise and fall, the operating rod 303 will drive the connecting cylinder 302 to reciprocate. The connecting cylinder 302 squeezes the internal elastic element 302a, and the elastic element 302a drives the limiting plate 301a-1, the shaking rod 301a and the connecting block 301 to shake. Finally, the connecting block 301 drives the screening frame 201 to shake, preventing blockage when the coal blocks fall.

[0041] Example 3

[0042] Reference Figures 1-4This is the third embodiment of the present invention, which further provides a low-load coal mill control device. It includes a feeding mechanism 400, comprising a bearing plate 401 disposed inside the conveying pipe 101a-1, an extension frame 401a disposed outside the bearing plate 401, and a through groove opened inside the extension frame 401a.

[0043] The feeding mechanism 400 also includes a sliding rod 402 disposed inside the extension frame 401a. A linkage block 402a is disposed on the outer side of the sliding rod 402, and a triangular plate 403 is disposed at one end of the linkage block 402a. The extension frame 401a is arranged circumferentially on the outer side of the support plate 401.

[0044] Usage process: When the coal block falls to the conveying pipe 101a-1, the bearing plate 401 is rotated, which drives the extension frame 401a to rotate. The extension frame 401a drives the sliding rod 402 to move along the preset track inside the extension frame 401a, so that the sliding rod 402 moves outward. Then, the sliding rod 402 drives the linkage block 402a and the triangular plate 403 to move outward, thereby adjusting the size of the opening and controlling the amount of coal block falling.

[0045] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing 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 elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0046] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0047] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A blanking mechanism characterized by: The utility model relates to a kind of coal mill, which includes the following: The external component (100) includes mill body (101), load frame (101a) arranged at one end of the mill body (101), conveying pipe (101a-1) arranged at one end of the load frame (101a) and load cylinder (102) arranged at one end of the conveying pipe (101a-1); The storage mechanism (200) includes sieve frame (201) arranged inside the load cylinder (102) and storage cylinder (202) arranged inside the sieve frame (201); The shaking mechanism (300) includes connecting block (301) arranged at one end of the sieve frame (201), shaking rod (301a) arranged at one end of the connecting block (301) and limiting disc (301a-1) arranged at one end of the shaking rod (301a).

2. The blanking mechanism of claim 1, wherein: The external component (100) further includes feed inlet (102b) opened above the load cylinder (102), and connecting plate (102a) arranged inside the feed inlet (102b).

3. The blanking mechanism of claim 2, wherein: The storage mechanism (200) further includes load rod (202a) arranged above the storage cylinder (202), and the load rod (202a) is circumferentially arranged above the storage cylinder (202), top cover (202a-1) is arranged above the load rod (202a), driving member (203) is arranged below the connecting plate (102a), and the driving member (203) is connected with the top cover (202a-1).

4. The blanking mechanism of claim 3, wherein: The shaking mechanism (300) further includes connecting cylinder (302) sleeved outside the shaking rod (301a), and elastic member (302a) is arranged inside the connecting cylinder (302), the elastic member (302a) is a return spring, and the connecting block (301) is circumferentially arranged outside the sieve frame (201).

5. The blanking mechanism of claim 4, wherein: The load cylinder (102) is provided with second linkage rod (304a) below, one end of the second linkage rod (304a) is provided with operation disc (304), the second linkage rod (304a) is circumferentially arranged outside the operation disc (304), fixed disc (305) is arranged above the operation disc (304), operation rod (303) is arranged outside the fixed disc (305), first linkage rod (303a) is arranged below the operation rod (303), and the operation rod (303) is circumferentially arranged outside the fixed disc (305).

6. The blanking mechanism of claim 5, wherein: The first linkage rod (303a) is inclined, and the operation disc (304) is triangular.

7. The blanking mechanism of claim 6, wherein: The operation rod (303) is connected with the connecting cylinder (302).

8. A low load coal mill control apparatus characterized by: The blanking mechanism includes the blanking mechanism in any one of claims 1-7, and the blanking mechanism (400) includes load disc (401) arranged inside the conveying pipe (101a-1), extension frame (401a) arranged outside the load disc (401) and through slot (401b) opened inside the extension frame (401a).

9. The low-NOx coal mill control system of claim 8, wherein: The blanking mechanism (400) further comprises a sliding rod (402) arranged inside the extension frame (401a), an outer side of the sliding rod (402) is provided with a linkage block (402a), one end of the linkage block (402a) is provided with a triangular plate (403).

10. The low-NOx coal mill control system of claim 9, wherein: The extension frame (401a) is circumferentially arranged outside the bearing disc (401).

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