Cover plate of coal mill

Abstract

The utility model discloses a coal mill cover plate which comprises a box body, the box body comprises a base and an upper cover plate, the base is arranged at an inlet above an oil pit, and the upper cover plate is obliquely arranged and covers the base, so that pulverized coal on the upper cover plate slides off from the upper cover plate. The base is located at an inlet above the oil pit, lubricating oil enters the oil pit through a special inlet, and the upper cover plate is obliquely arranged on the base, so that the inlet of the oil pit can be blocked by the upper cover plate, and all pulverized coal falls on the upper cover plate on the base. Due to the fact that the upper cover plate is obliquely arranged, pulverized coal falling on the upper cover plate can slide off from the upper cover plate under the action of gravity and cannot be accumulated on the upper cover plate, the pulverized coal is prevented from falling into an oil pit, the pulverized coal and lubricating oil in the oil pit are prevented from being mixed together to form oil sludge, and the lubricating oil in the oil pit can be recycled easily. And increase of vibration of the coal mill caused by oil sludge entering large teeth of the coal mill can be reduced and improved.

Description

Technical Field

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

[0002] The coal mill system is a key component of the pulverizing system. Coal enters the mill, where it is dried by hot air and continuously impacted by steel balls, turning it into pulverized coal, which then provides fuel for the burners. The healthy operation of the pulverizer directly impacts the unit's load and economic efficiency.

[0003] Coal mills typically feature a large gear (referred to as the "gear" for short). To ensure the gear's proper operation, a dedicated oil injection line is installed to supply lubricating oil to the gear, ensuring smooth rotation. To prevent the lubricating oil from dripping onto the ground after passing through the gear and polluting the environment, an oil pit is typically installed beneath the mill's housing. This allows the lubricating oil to flow into the pit after passing through the gear, preventing environmental pollution. Once the pit is full, it is cleaned and the oil is pumped out.

[0004] However, in actual operation, the pulverized coal from the pulverizer enters the oil pit through the pulverizer housing, mixing with the lubricating oil of the gears inside to form sludge, which is extremely difficult to deal with. Furthermore, as the sludge accumulates, it can in turn find its way to the bottom of the gears, where it can be dragged into the gears as they rotate, causing vibration. Excessive vibration exceeding specified limits necessitates shutdown, ultimately impacting both unit load and economic efficiency. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a coal mill cover, which can block coal powder from entering the oil pit, prevent the coal powder and the lubricating oil in the oil pit from mixing together to form sludge, facilitate the recovery of the lubricating oil in the oil pit, and reduce and improve the increase in coal mill vibration caused by the large teeth of the coal mill entering the sludge.

[0006] According to the embodiment of the utility model, the coal mill cover plate includes a box body, which includes a base and an upper cover plate. The base is placed at the entrance above the oil pit, and the upper cover plate is tilted to cover the base so that the coal powder on the upper cover plate slides off the upper cover plate.

[0007] The coal mill cover plate according to the embodiment of the present invention is configured in such a manner that at least the following beneficial effects can be achieved: the base is located at the entrance above the oil pit, the lubricating oil has a dedicated entrance to enter the oil pit, and the upper cover plate is tilted on the base so that the upper cover plate can block the entrance to the oil pit, allowing all coal dust to fall onto the upper cover plate on the base. Because the upper cover plate is tilted, the coal dust that falls on the upper cover plate will slide off the upper cover plate under the action of gravity and will not accumulate on the upper cover plate, thereby preventing the coal dust from falling into the oil pit and preventing the coal dust and the lubricating oil in the oil pit from mixing to form sludge. This facilitates the recovery of the lubricating oil in the oil pit and can reduce and improve the increase in coal mill vibration caused by the entry of sludge into the large teeth of the coal mill.

[0008] According to some embodiments of the present invention, the base is fixedly disposed above the oil pit.

[0009] According to some embodiments of the present invention, the base is fixedly connected to the top of the oil pit by bolts.

[0010] According to some embodiments of the present invention, the base is a U-shaped frame composed of a front panel, two side panels and a rear panel, the bottom of the frame is connected to the oil pit, and the upper cover covers the top opening of the frame.

[0011] According to some embodiments of the present invention, the front panel includes a detachable front panel, and the detachable front panel is detachably connected to the side panel.

[0012] According to some embodiments of the present invention, the front panel includes a fixed front panel, and two detachable front panels are provided; the fixed front panel is fixedly connected to the upper cover plate, and the two detachable front panels are respectively located on both sides of the fixed front panel and are detachably connected to the side panels and the fixed front panel.

[0013] According to some embodiments of the present invention, the detachable front panel and the side panels are detachably connected via bolts.

[0014] According to some embodiments of the present invention, the upper cover includes a detachable upper cover, and the detachable upper cover is detachably connected to the top of the base.

[0015] According to some embodiments of the present invention, the upper cover plate also includes a fixed upper cover plate, and the removable upper cover plate is provided in two pieces. The fixed upper cover plate is arranged at the middle position of the top of the base and is fixedly connected to the base, and the two removable upper cover plates are respectively located on both sides of the fixed upper cover plate and are detachably connected to the top of the base and the fixed upper cover plate.

[0016] According to some embodiments of the present invention, the detachable upper cover is detachably connected to the top of the base via bolts.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the overall structure of a coal mill cover according to an embodiment of the present utility model;

[0020] Figure 2 It is a schematic diagram of the exploded structure of a coal mill cover according to an embodiment of the present utility model.

[0021] Reference numerals:

[0022] The base 100 , the front panel 110 , the detachable front panel 111 , the fixed front panel 112 , the side panels 120 , the rear panel 130 , the upper cover 200 , the detachable upper cover 210 , and the fixed upper cover 220 . DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference below Figures 1 to 2 The coal mill cover according to the embodiment of the present invention is described below.

[0028] According to the coal mill cover plate of the embodiment of the present invention, it includes a box body, which includes a base 100 and an upper cover plate 200. The base 100 is placed at the entrance above the oil pit, and the upper cover plate 200 is tilted and covers the base 100, so that the coal powder on the upper cover plate 200 slides off the upper cover plate 200.

[0029] For example Figure 1 and Figure 2 As shown, the coal mill cover includes a housing, which includes a base 100 and an upper cover 200. The base 100 prevents lubricating oil from flowing into the oil pit through a dedicated channel at the upper entrance of the oil pit. The upper cover 200 is tilted on the base 100, so that the coal powder on the upper cover 200 can slide off the upper cover 200 under the action of gravity, and will not accumulate on the upper cover 200 or enter the oil pit. This prevents the coal powder and the lubricating oil in the oil pit from mixing to form sludge, facilitates the recovery of the lubricating oil in the oil pit, and can reduce and improve the increase in coal mill vibration caused by the entry of sludge into the large teeth of the coal mill.

[0030] When too much lubricating oil accumulates in the oil pit, the base 100 and the upper cover 200 can be removed from the entrance above the oil pit, and then the lubricating oil in the oil pit can be pumped out using a pump for reuse, thereby reusing resources and saving resources.

[0031] Furthermore, the two side panels 120 of the base 100 are arranged in a right-angled trapezoidal shape, with the upper side tilted downward, so that the upper cover plate 200 can be tilted on the base 100, so that the coal powder slides down from the upper cover plate 200 and does not accumulate on the upper cover plate 200.

[0032] It should be noted that the coal mill includes a coal mill cover, and the coal mill teeth are also provided with coal mill tooth covers. The coal mill cover and coal mill tooth covers prevent coal dust from entering the coal mill and the coal mill teeth. However, the oil pit is located outside the coal mill cover and the coal mill tooth covers, so it is impossible to prevent coal dust from entering the oil pit alone. By placing the coal mill cover above the oil pit, coal dust can be prevented from entering the oil pit. The two side panels 120 of the base 100 are respectively abutted and fixed with the coal mill cover, the rear panel 130 is close to the coal mill tooth cover, and the upper cover 200 prevents coal dust from entering the oil pit.

[0033] In some specific embodiments of the present application, the base 100 is fixedly disposed above the oil pit.

[0034] Fixedly placing the base 100 above the oil pit can better prevent coal dust from falling into the oil pit. Because the rotation of the large gear of the coal mill may cause the coal mill to vibrate, the position of the base 100 may shift and not completely cover the upper entrance of the oil pit. Therefore, by fixing the base 100 above the oil pit, this situation can be avoided. The position of the base 100 is not shifted, which can better prevent coal dust from falling into the oil pit.

[0035] There are various ways to secure the base 100 to the oil pit. You can secure the base 100 to the oil pit using bolts and screw holes, or you can use glue or other materials to secure the base 100 to the oil pit. Additionally, you can use angle steel to reinforce the base 100 to stabilize the connection between the base 100 and the oil pit.

[0036] In some specific embodiments of the present application, the base 100 is fixedly connected to the top of the oil pit by bolts.

[0037] For example Figure 1 As shown, base 100 is fixedly connected to the top of the oil pit via bolts. The bolts secure base 100 to the oil pit, and can be removed when needed. For example, when the oil pit is full of lubricating oil, base 100 can be removed from the pit, and the pump can be placed into the pit to pump out the lubricating oil for reuse.

[0038] In some specific embodiments of the present application, the base 100 is a U-shaped frame composed of a front panel 110, two side panels 120 and a rear panel 130. The bottom of the frame is connected to the oil pit, and the upper cover 200 covers the top opening of the frame.

[0039] For example Figure 1 and Figure 2 As shown, the base 100 is a square-shaped frame consisting of a front panel 110, two side panels 120, and a rear panel 130. The base 100 and the upper cover 200 together form a box with an open lower portion. The square-shaped frame of the base 100 connects the base 100 to the oil pit. To remove the lubricating oil from the oil pit, the upper cover 200 can be removed without removing the base 100. With the upper cover 200 removed, the pump can be inserted through the through-hole in the center of the base 100 into the oil pit to pump the lubricating oil.

[0040] In some specific embodiments of the present application, the front panel 110 includes a detachable front panel 111 , and the detachable front panel 111 is detachably connected to the side panel 120 .

[0041] For example Figure 2 As shown, the front panel 110 includes a detachable front panel 111, which is detachably connected to the two side panels 120. When the lubricating oil in the oil pit is full, there is no need to remove the upper cover 200. Instead, the detachable front panel 111 can be removed and a pump can be inserted into the oil pit through the detachable front panel 111 to pump out the lubricating oil.

[0042] In some specific embodiments of the present application, the front panel 110 includes a fixed front panel 112, and two detachable front panels 111 are provided; the fixed front panel 112 is fixedly connected to the upper cover 200, and the two detachable front panels 111 are respectively located on both sides of the fixed front panel 112 and are detachably connected to the side panels 120 and the fixed front panel 112.

[0043] For example Figure 2 As shown, the front panel 110 includes a fixed front panel 112 and a removable front panel 111. The removable front panels 111 are provided in two pieces, with the fixed front panel 112 located between the two removable front panels 111. Together, the three panels comprise the front panel 110. The fixed front panel 112 is fixed, while the two removable front panels 111 are removably connected to the fixed front panel 112 at one end and to the side panels 120 at the other end. This arrangement allows the oil pit to be filled with lubricating oil without removing the top cover 200. Instead, the removable front panels 111 can be removed and a pump can be inserted into the oil pit through the removable front panels 111 to pump the lubricating oil.

[0044] In some specific embodiments of the present application, the detachable front panel 111 and the side panels 120 are detachably connected via bolts.

[0045] For example Figure 1 As shown, the detachable front panel 111 and the side panels 120 are fixedly connected by bolts. When the detachable front panel 111 and the side panels 120 need to be separated from each other, the bolts can be unscrewed. For example, when the lubricating oil in the oil pit is full, the detachable front panel 111 can be removed from the base 100, and the pump can be placed from the detachable front panel 111 into the oil pit to pump out the lubricating oil in the oil pit for reuse.

[0046] In some specific embodiments of the present application, the upper cover 200 includes a detachable upper cover 210 , which is detachably connected to the top of the base 100 .

[0047] For example Figure 1 and Figure 2As shown, the upper cover 200 includes a detachable upper cover 210, which is detachably connected to the top of the base 100. When the lubricating oil in the oil pit is full, the detachable upper cover 210 can be removed from the base 100, and the pump can be placed from the detachable upper cover 210 into the oil pit to pump out the lubricating oil in the oil pit for reuse.

[0048] In some specific embodiments of the present application, the upper cover plate 200 also includes a fixed upper cover plate 220, and two removable upper cover plates 210 are provided. The fixed upper cover plate 220 is provided at the middle position of the top of the base 100 and is fixedly connected to the base 100. The two removable upper cover plates 210 are respectively located on both sides of the fixed upper cover plate 220 and are detachably connected to the top of the base 100 and the fixed upper cover plate 220.

[0049] For example Figure 1 and Figure 2 As shown, the upper cover 200 includes a fixed upper cover 220 and two removable upper cover 210, wherein the fixed upper cover 220 is located in the middle, and the two removable upper cover 210 are located on both sides of the fixed upper cover 220, and the three together constitute the upper cover 200. One end of the removable upper cover 210 is connected to the fixed upper cover 220, and the other end is connected to the side panel 120.

[0050] exist Figure 2 In the illustrated embodiment, the fixed upper cover 220 is fixedly connected to the base 100. Furthermore, the fixed upper cover 220 and the base 100 are integrally formed, providing a more secure connection. The fixed upper cover 220 is integrally formed with the side panels 120 and the rear panel 130 of the base 100 in a "H" shape for ease of production.

[0051] By setting the detachable upper cover 210, when the lubricating oil in the oil pit is full, the detachable upper cover 210 can be removed from the base 100, and the pump from the detachable upper cover 210 is placed into the oil pit to pump out the lubricating oil in the oil pit for reuse.

[0052] In some specific embodiments of the present application, the detachable upper cover 210 is detachably connected to the top of the base 100 by bolts.

[0053] For example Figure 1 As shown, the detachable upper cover 210 is detachably connected to the top of the base 100 via bolts. The arrangement of the bolts and screw holes facilitates the installation and removal of the detachable upper cover 210 .

[0054] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A coal mill cover, characterized in that: include: A box body, the box body comprises a base (100) and an upper cover (200), the base (100) is placed at the entrance above the oil pit, the upper cover (200) is tilted and covers the base (100), so that the coal powder on the upper cover (200) slides off the upper cover (200), wherein the base (100) is a U-shaped frame composed of a front panel (110), two side panels (120) and a rear panel (130), the bottom of the frame is connected to the oil pit, and the upper cover (200) covers the top opening of the frame.

2. The coal mill cover according to claim 1, characterized in that: The base (100) is fixedly arranged above the oil pit.

3. The coal mill cover according to claim 2, characterized in that: The base (100) is fixedly connected to the top of the oil pit via bolts.

4. The coal mill cover according to claim 1, characterized in that: The front panel (110) includes a detachable front panel (111), and the detachable front panel (111) is detachably connected to the side panel (120).

5. The coal mill cover according to claim 4, characterized in that: The front panel (110) includes a fixed front panel (112), and two detachable front panels (111) are provided; the fixed front panel (112) is fixedly connected to the upper cover (200), and the two detachable front panels (111) are respectively located on both sides of the fixed front panel (112) and detachably connected to the side panels (120) and the fixed front panel (112).

6. The coal mill cover according to claim 4, characterized in that: The detachable front panel (111) and the side panel (120) are detachably connected via bolts.

7. The coal mill cover according to claim 1, characterized in that: The upper cover plate (200) includes a detachable upper cover plate (210), and the detachable upper cover plate (210) is detachably connected to the top of the base (100).

8. The coal mill cover according to claim 7, characterized in that: The upper cover plate (200) further comprises a fixed upper cover plate (220), and two detachable upper cover plates (210) are provided. The fixed upper cover plate (220) is provided at a central position on the top of the base (100) and is fixedly connected to the base (100), and the two detachable upper cover plates (210) are respectively located on both sides of the fixed upper cover plate (220) and are detachably connected to the top of the base (100) and the fixed upper cover plate (220).

9. The coal mill cover according to claim 7, characterized in that: The detachable upper cover plate (210) is detachably connected to the top of the base (100) via bolts.

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