Coal mill

Abstract

The utility model discloses a coal mill, which belongs to the technical field of coal treatment and comprises a coal mill body, a coal milling roller is rotatably mounted in the coal mill body, and a feed hopper is arranged at the top of the coal mill body; the quantitative feeding mechanism is arranged at the position of a feeding hopper at the top of the coal mill body, the quantitative feeding mechanism comprises a pretreatment box and two quantitative boxes, the pretreatment box is used for carrying out rough machining on coal in advance before the coal enters the coal mill, and the two quantitative boxes are used for quantitatively conveying the coal subjected to rough machining into the coal mill body. Compared with the prior art, the quantitative conveying device has the advantages that the quantitative boxes and the quantitative baffles are arranged, through the alternate action, only one quantitative box is opened and conveys coal briquettes each time, and the accuracy and continuity of quantitative conveying are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coal processing, in particular to a coal mill. Background Art

[0002] Coal mill is an industrial equipment used to grind coal into fine powder. It is mainly used in thermal power plants and cement plants to improve the efficiency and uniformity of coal combustion. By applying mechanical pressure and friction to the coal through components such as coal grinding rollers, the coal mill can grind the coal into coal powder of a specified fineness, thereby optimizing the combustion process and improving energy utilization.

[0003] When feeding the coal mill, the mutual squeezing between the machine itself and the coal blocks can easily cause fluctuations in the feed amount. Excessive feeding may cause the coal mill to overload, reduce the coal grinding effect and increase the risk of equipment wear. Insufficient feeding will lead to low coal grinding efficiency and the equipment cannot be fully utilized. Fluctuations in the feed amount cause uneven distribution of coal blocks inside the coal mill, affecting the coal grinding effect. Uneven feeding will cause some coal blocks to not be fully ground, reducing the quality of coal powder. In addition, unstable feed amount can easily cause coal blocks to accumulate at the feed port or inside the coal mill, increasing the risk of blockage. Blockage not only affects normal production, but may also cause equipment failure and increase maintenance costs. Utility Model Content

[0004] The purpose of the utility model is to provide a coal mill to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A coal mill, comprising:

[0007] A coal mill body, wherein a coal mill roller is rotatably mounted inside the coal mill body, and a feed hopper is provided on the top of the coal mill body;

[0008] A quantitative feeding mechanism, which is arranged at the top feeding hopper position of the coal mill body, and comprises a pretreatment box and two quantitative boxes;

[0009] The quantitative feeding mechanism also includes a discharge hopper, which is located directly below the two quantitative boxes, and the bottom of the discharge hopper is directly opposite to the feed hopper.

[0010] Preferably, a group of meshing coarse grinding rollers are rotatably installed inside the pretreatment box, and a partition guide block is provided in the middle of the bottom of the pretreatment box. The partition guide block is inclined on both sides, and two feed ports are respectively provided on both sides of the partition guide block. The two feed ports are respectively connected to the two quantitative boxes.

[0011] Preferably, an inclined side plate is provided on one side of the interior of the quantitative box to facilitate the falling of the coal blocks after rough processing. The first rotating rod and the second rotating rod are rotatably installed on one side of the bottom of the two quantitative boxes respectively. The other sides of the first rotating rod and the second rotating rod are fixedly connected with quantitative baffles, and the two quantitative baffles are staggered.

[0012] Preferably, a connecting sleeve is fixedly sleeved on one end of the first rotating rod close to the second rotating rod, an inner gear ring is arranged on the inner side of the connecting sleeve, and a meshing gear meshing with the inner gear ring is fixedly installed on one end of the second rotating rod close to the first rotating rod.

[0013] Preferably, fixed blocks are fixedly installed on both sides of the quantitative box, a positioning rod is fixedly installed on the bottom end of the fixed block, a limit block is arranged at the bottom end of the positioning rod, and the limit block is arranged in a conical shape.

[0014] Preferably, limiting sleeves corresponding to the positioning rod are respectively provided on both sides of the quantitative baffle, through grooves are provided on both sides inside the limiting sleeves, and movable rods are movably installed inside the through grooves.

[0015] Preferably, one end of the movable rod in the limiting sleeve is fixedly connected to a self-locking block, a side of the self-locking block away from the limiting block is arranged in an inclined surface, and a return spring is also sleeved on the outer surface of the movable rod.

[0016] Preferably, two discharging baffles are rotatably mounted at the bottom of the discharging hopper, a cylinder is fixedly mounted at one end of the discharging hopper, and a telescopic end of the cylinder is rotatably connected to one of the discharging baffles.

[0017] Preferably, a material guide plate matched with the coal grinding roller is provided on one side of the top of the coal mill body, and two inclined protective plates are respectively provided on both sides of the top of the coal mill body.

[0018] Preferably, rotating shafts are rotatably mounted on both sides of the coal mill body, and both rotating shafts are provided with flip side plates.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. This type of coal mill is provided with a quantitative box and a quantitative baffle. When one of the quantitative boxes is fully loaded, the quantitative baffle will start to rotate and open, allowing the coal blocks to fall into the discharge hopper. At this time, the opened quantitative baffle drives the first rotating rod to rotate, and the first rotating rod drives the meshing gear and the second rotating rod to rotate in the opposite direction through the inner gear ring of the connecting sleeve, thereby closing the other quantitative baffle. When the closed quantitative baffle ensures that the quantitative box on the other side no longer continues to fall coal blocks, the coal blocks continue to be filled into the currently opened quantitative box. When the quantitative box is fully loaded again, the quantitative baffle is opened again to allow the coal blocks to fall, and the above process is repeated. Through this alternating action, only one quantitative box is opened and transports coal blocks at a time, ensuring the accuracy and continuity of quantitative transportation.

[0021] 2. This type of coal mill is equipped with a limit sleeve and a limit block. When the quantitative baffle is closed, the limit sleeve moves upward and nests the positioning rod. The self-locking block is squeezed through the conical bottom of the limit block, smoothly reaches the top of the limit block and limits the quantitative baffle. At this time, the reset spring provides additional supporting force to ensure that the self-locking block reliably maintains the limited state. When the weight of the coal block inside the quantitative box reaches a certain level, the two self-locking blocks release the limit through the inclined surface at the bottom and the limit block, open the quantitative baffle, and allow the coal block to continue to fall into the discharge hopper and enter the coal mill body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the pretreatment box of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the quantitative box of the utility model;

[0026] Figure 4 This is a schematic diagram of the gear transmission structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the planar structure of the quantitative box and the discharging hopper of the utility model;

[0028] Figure 6 For this utility model Figure 5 The enlarged structural diagram at A in the middle;

[0029] Figure 7This is a schematic diagram of the self-locking structure of the utility model;

[0030] Figure 8 It is a schematic diagram of the internal structure of the coal mill body of the utility model.

[0031] The markings in the figure are:

[0032] 1. Coal mill body; 101. Feed hopper; 102. Guide plate; 103. Protective plate; 104. Rotating shaft; 105. Flip side plate; 2. Coal grinding roller; 3. Quantitative feeding mechanism; 4. Pretreatment box; 401. Coarse grinding roller; 402. Partition guide block; 403. Feed port; 5. Quantitative box; 501. Inclined side plate; 502. First rotating rod; 503. Second rotating rod; 504. Connecting sleeve; 505. Internal gear ring; 506. Meshing gear; 507. Fixed block; 508. Positioning rod; 509. Limit block; 6. Quantitative baffle; 601. Limit sleeve; 602. Through groove; 603. Movable rod; 604. Self-locking block; 605. Reset spring; 7. Discharge hopper; 701. Discharge baffle; 702. Cylinder. DETAILED DESCRIPTION

[0033] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0034] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0035] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0036] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0037] like Figures 1 to 8As shown, the coal mill comprises a coal mill body 1, a coal mill roller 2 is rotatably installed inside the coal mill body 1, and a feed hopper 101 is arranged on the top of the coal mill body 1; a quantitative feeding mechanism 3, which is arranged at the position of the feed hopper 101 on the top of the coal mill body 1, and the quantitative feeding mechanism 3 comprises a pretreatment box 4 and two quantitative boxes 5, the pretreatment box 4 is used for pre-rough processing of coal before entering the coal mill, and the two quantitative boxes 5 are used for quantitatively conveying the roughly processed coal to the inside of the coal mill body 1; the quantitative feeding mechanism 3 also comprises a discharge hopper 7, which is located directly below the two quantitative boxes 5, and the bottom of the discharge hopper 7 is directly opposite to the feed hopper 101, A group of meshing coarse grinding rollers 401 are rotatably installed inside the pretreatment box 4, a partition guide block 402 is arranged in the middle of the bottom of the pretreatment box 4, and the partition guide block 402 is arranged in an inclined state on both sides, and two feed ports 403 are respectively arranged on both sides of the partition guide block 402, and the two feed ports 403 are respectively connected to the two quantitative boxes 5, and a guide plate 102 adapted to the coal grinding roller 2 is arranged on one side of the top of the coal mill body 1, and two inclined protective plates 103 are also respectively arranged on both sides of the top of the coal mill body 1, and rotating shafts 104 are also rotatably installed on both sides of the coal mill body 1, and flip side plates 105 are arranged on the two rotating shafts 104;

[0038] The coal first enters the pretreatment box 4, and under the meshing action of the two coarse grinding rollers 401, the coal is preliminarily processed into smaller particles. The roughly processed coal is guided by the dividing guide block 402 and enters the two feed ports 403 and the two metering boxes 5 respectively. The metering boxes 5 carry out quantitative transportation of the roughly processed coal. The coal enters the discharge hopper 7 from the bottom of the metering box 5 and enters the feed hopper 101 of the coal mill body 1 through the discharge hopper 7. After entering the coal mill body 1, the coal enters the coal grinding roller 2 through the guide plate 102 for further fine grinding. The ground coal powder is evenly distributed in the coal mill body 1. The protective plate 103 and the flip side plate 105 ensure that the coal powder will not splash, ensuring safe operation and clean environment. In the whole process, through the cooperation of the pretreatment box 4, the metering box 5 and the coal mill body 1, efficient pretreatment, quantitative transportation and fine grinding of the coal are realized, manual operation is reduced, and work efficiency and safety are improved.

[0039] Further examples:

[0040] like Figures 3 to 7As shown, an inclined side plate 501 is provided on one side of the interior of the quantitative box 5, which can facilitate the falling of the roughly processed coal blocks. A first rotating rod 502 and a second rotating rod 503 are rotatably installed on one side of the bottom of the two quantitative boxes 5, and the other sides of the first rotating rod 502 and the second rotating rod 503 are fixedly connected with quantitative baffles 6. The two quantitative baffles 6 are staggered. A connecting sleeve 504 is fixedly sleeved on one end of the first rotating rod 502 close to the second rotating rod 503, and an inner gear ring 505 is provided on the inner side of the connecting sleeve 504. A meshing gear 506 meshing with the inner gear ring 505 is fixedly installed on one end of the second rotating rod 503 close to the first rotating rod;

[0041] When coal enters the quantitative box 5, the coal will first fall smoothly to the bottom of the quantitative box 5 through the inclined side plate 501. When one of the quantitative boxes 5 is fully loaded, the quantitative baffle 6 will start to rotate and open, allowing the coal to fall into the discharge hopper 7. At this time, the opened quantitative baffle 6 drives the first rotating rod 502 to rotate, and the first rotating rod 502 drives the meshing gear 506 and the second rotating rod 503 to rotate in the opposite direction through the inner gear ring 505 of the connecting sleeve 504, thereby closing the other quantitative baffle 6. When the closed quantitative baffle 6 ensures that the quantitative box 5 on the other side no longer drops coal, , the coal blocks continue to be filled into the currently opened quantitative box 5. When the quantitative box 5 is fully loaded again, the quantitative baffle 6 is opened again to make the coal blocks fall, and the above process is repeated. Through this alternating action, only one quantitative box 5 is opened and transports the coal blocks at a time, ensuring the accuracy and continuity of quantitative transportation. During the whole process, the inclined side plate 501 ensures that the coal blocks fall smoothly. The quantitative baffle 6 and the rotating mechanism realize alternating switching through synchronous control, ensuring the stability and reliability of quantitative transportation of coal blocks. This design reduces manual intervention and improves operating efficiency and the degree of automation of the equipment.

[0042] Fixed blocks 507 are also fixedly installed on both sides of the quantitative box 5, and a positioning rod 508 is fixedly installed on the bottom end of the fixed block 507. A limiting block 509 is set at the bottom end of the positioning rod 508. The limiting block 509 is set in a conical shape. Limiting sleeves 601 corresponding to the positioning rod 508 are also respectively set on both sides of the quantitative baffle 6. Through grooves 602 are opened on both sides of the limiting sleeve 601. A movable rod 603 is movably installed inside the through groove 602. One end of the movable rod 603 located in the limiting sleeve 601 is fixedly connected with a self-locking block 604. The self-locking block 604 is set in an inclined surface away from the limiting block 509. The outer surface of the movable rod 603 is also sleeved with a return spring 605;

[0043] When the quantitative baffle 6 is closed, the limiting sleeve 601 moves upward and nests the positioning rod 508, and the self-locking block 604 is squeezed through the conical bottom of the limiting block 509, smoothly reaches the top of the limiting block 509 and limits the quantitative baffle 6. At this time, the return spring 605 provides additional support to ensure that the self-locking block 604 reliably maintains the limiting state. When the weight of the coal blocks inside the quantitative box 5 reaches a certain level, the two self-locking blocks 604 release the limit with the limiting block 509 through the inclined surface at the bottom, open the quantitative baffle 6, and allow the coal blocks to It continues to fall to the discharge hopper 7 and enters the coal mill body 1. The alternating opening and closing action of the quantitative baffle 6 is synchronously controlled by the rotating rod and the meshing gear 506, ensuring the quantitative delivery of the coal block each time. During the whole process, the design of the limit sleeve 601, the positioning rod 508 and the limit block 509 provides precise limit and automatic control functions, ensuring the stable opening and closing of the quantitative baffle 6. The cooperation of the reset spring 605 and the self-locking block 604 realizes automatic unlocking and limiting, reduces manual intervention, and improves operating efficiency and the degree of automation of the equipment.

[0044] Further examples:

[0045] like Figure 3 , Figure 5 As shown, two discharging baffles 701 are rotatably mounted at the bottom of the discharging hopper 7, and a cylinder 702 is fixedly mounted at one end of the discharging hopper 7, and the telescopic end of the cylinder 702 is rotatably connected to one of the discharging baffles 701;

[0046] When the bottom discharge baffle 701 of the discharge hopper 7 is closed, the coal blocks are temporarily accumulated in the discharge hopper 7. When the telescopic end of the cylinder 702 moves, it drives one of the discharge baffles 701 to open, so that the coal blocks fall from the bottom of the discharge hopper 7 into the coal mill body 1. The movement of the cylinder 702 can be controlled by an automatic control system to achieve precise opening and closing operations.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A coal mill, characterized in that: include: A coal mill body (1), wherein a coal mill roller (2) is rotatably mounted inside the coal mill body (1), and a feed hopper (101) is provided on the top of the coal mill body (1); A quantitative feeding mechanism (3), the quantitative feeding mechanism (3) being arranged at a top feeding hopper (101) of the coal mill body (1), the quantitative feeding mechanism (3) comprising a pretreatment box (4) and two quantitative boxes (5); The quantitative feeding mechanism (3) further comprises a discharge hopper (7), wherein the discharge hopper (7) is located directly below the two quantitative boxes (5), and the bottom of the discharge hopper (7) is directly opposite to the feed hopper (101).

2. A coal mill according to claim 1, characterized in that: A group of meshing rough grinding rollers (401) are rotatably mounted inside the pretreatment box (4), a partition guide block (402) is arranged in the middle of the bottom of the pretreatment box (4), the partition guide block (402) is arranged in an inclined state on both sides, and two feed ports (403) are respectively arranged on both sides of the partition guide block (402), and the two feed ports (403) are respectively connected to the two quantitative boxes (5).

3. A coal mill according to claim 2, characterized in that: An inclined side plate (501) is provided on one side of the interior of the quantitative box (5) to facilitate the falling of the roughly processed coal blocks. A first rotating rod (502) and a second rotating rod (503) are rotatably mounted on one side of the bottom of the two quantitative boxes (5), and a quantitative baffle (6) is fixedly connected to the other side of the first rotating rod (502) and the second rotating rod (503). The two quantitative baffles (6) are arranged in a staggered manner.

4. A coal mill according to claim 3, characterized in that: A connecting sleeve (504) is fixedly sleeved on one end of the first rotating rod (502) close to the second rotating rod (503), an inner gear ring (505) is arranged on the inner side of the connecting sleeve (504), and a meshing gear (506) meshing with the inner gear ring (505) is fixedly installed on one end of the second rotating rod (503) close to the first rotating rod.

5. A coal mill according to claim 4, characterized in that: Fixed blocks (507) are also fixedly mounted on both sides of the quantitative box (5), a positioning rod (508) is fixedly mounted on the bottom end of the fixed block (507), a limiting block (509) is arranged at the bottom end of the positioning rod (508), and the limiting block (509) is arranged in a conical shape.

6. A coal mill according to claim 3, characterized in that: Limiting sleeves (601) corresponding to the positioning rod (508) are also provided on both sides of the quantitative baffle (6), and through grooves (602) are provided on both sides of the interior of the limiting sleeve (601), and movable rods (603) are movably installed inside the through grooves (602).

7. A coal mill according to claim 6, characterized in that: One end of the movable rod (603) in the limiting sleeve (601) is fixedly connected to a self-locking block (604), and the side of the self-locking block (604) away from the limiting block (509) is arranged in an inclined surface. The outer surface of the movable rod (603) is also sleeved with a return spring (605).

8. A coal mill according to claim 1, characterized in that: Two discharge baffles (701) are rotatably mounted at the bottom of the discharge hopper (7), and a cylinder (702) is fixedly mounted at one end of the discharge hopper (7), wherein the telescopic end of the cylinder (702) is rotatably connected to one of the discharge baffles (701).

9. A coal mill according to claim 1, characterized in that: A material guide plate (102) adapted to the coal grinding roller (2) is provided on one side of the top of the coal mill body (1), and two inclined protective plates (103) are also provided on both sides of the top of the coal mill body (1).

10. A coal mill according to claim 9, characterized in that: Rotating shafts (104) are rotatably mounted on both sides of the coal mill body (1), and both rotating shafts (104) are provided with flip side plates (105).

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