Noise and vibration reduction device and method for coal mill

Abstract

The invention discloses a noise and vibration reduction device and method for a coal mill, and relates to the technical field of thermal power plant processing equipment.The noise and vibration reduction device comprises two sets of side sound insulation plates, the two sets of side sound insulation plates are arranged in parallel, upper sound insulation plates are fixedly installed on the upper surfaces of the two sets of side sound insulation plates arranged in parallel, and the upper sound insulation plates and the side sound insulation plates form an inverted U-shaped sound insulation cover; a positioning assembly is arranged in the U-shaped sound insulation cover and comprises a coal mill positioning piece, the coal mill positioning piece comprises an upper positioning bag, a lower positioning bag and a suction pump, and the suction pump can make the upper positioning bag and the lower positioning bag expand to wrap the outer surface of the coal mill; the lower positioning piece comprises an inner abutting plate, the inner abutting plate is rotationally connected to the inner side of the side sound insulation plate, and multiple sets of adsorption discs are arranged on the lower surface of the inner abutting plate. The positioning bag is more seamlessly attached to the surface of the coal mill through expansion of the positioning bag, the vibration reduction capacity of the positioning bag is improved, and the noise reduction and vibration reduction effect is comprehensively improved; and the equipment is convenient to disassemble and assemble.

Description

Technical Field

[0001] This invention relates to the field of processing equipment technology for thermal power plants, specifically to a noise reduction and vibration damping device and method for coal mills. Background Technology

[0002] Coal mills are important processing equipment in thermal power plants. Due to the working principle of coal mills, they generate a lot of noise and vibration during processing. In order to reduce noise and vibration, sound insulation pads or vibration damping springs are usually added to the coal mills in thermal power plants.

[0003] Ordinary spring vibration damping devices have limited limiting effect on equipment and are generally fixedly installed with the coal mill itself, making it difficult to adjust or replace their position. The installation position of the equipment itself is limited, and if new noise-generating or vibration-damping locations appear, new noise reduction and vibration damping devices need to be added, thus limiting the ability to protect against noise.

[0004] Based on this, the present invention designs a noise reduction and vibration damping device and method for a coal mill to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a noise reduction and vibration damping device for a coal mill, which uses a movable soundproof cover to fit onto the surface of the coal mill to reduce noise. Furthermore, by expanding the positioning bladder, it can fit more seamlessly onto the surface of the coal mill, thereby improving its vibration damping capacity. This comprehensively improves the noise reduction and vibration damping effect while facilitating the disassembly and assembly of the equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A noise reduction and vibration damping device for a coal mill includes side sound insulation panels. Two sets of side sound insulation panels are arranged in parallel. An upper sound insulation panel is fixedly installed on the upper surface of the two parallel sets of side sound insulation panels. The upper sound insulation panel and the side sound insulation panels form an inverted U-shaped sound insulation cover. Rotating plates are rotatably installed at both ends of the U-shaped sound insulation cover. A positioning component is provided inside the U-shaped sound insulation cover. The positioning component includes: A coal mill positioning component, comprising an upper positioning bladder, a lower positioning bladder, and a suction pump, wherein the suction pump enables the upper and lower positioning bladders to expand and wrap around the outer surface of the coal mill. The lower positioning component includes an inner contact plate, which is rotatably connected to the inner side of the side sound insulation plate. The lower surface of the inner contact plate is provided with multiple sets of adsorption plates, and the suction pump can create a negative pressure on the lower surface of the adsorption plates.

[0007] Preferably, each of the side sound insulation panels is provided with a coal mill positioning component, the suction pump is fixedly installed at the upper end of the side sound insulation panel, the upper positioning bladder is located below the suction pump and is also fixedly connected to the side sound insulation panel, and the lower positioning bladder is fixedly connected to the inner contact plate on the side sound insulation panel.

[0008] Preferably, multiple sets of connecting tubes are provided between the lower positioning bladder and the upper positioning bladder, and the upper positioning bladder is connected to the suction pump through a liquid guide tube. The suction pump can push gas into the upper positioning bladder through the liquid guide tube, and the gas in the upper positioning bladder can enter the lower positioning bladder through the connecting tube.

[0009] Preferably, both the side sound insulation panel and the inner contact panel are hollow and their cavities are filled with liquid. An inner connecting pipe is fixedly installed at the upper end of the inner contact panel, and the upper end of the inner connecting pipe is connected to the side sound insulation panel. One end of the suction pump is provided with a connecting hose, and the connecting hose is introduced into the hollow cavity of the side sound insulation panel.

[0010] Preferably, the upper end of the adsorption plate is connected to the hollow cavity of the inner contact plate, and a one-way air valve is fixedly installed on it. When the suction pump discharges the liquid in the side sound insulation plate, it can create a negative pressure on the lower side of the adsorption plate through the one-way air valve. The upper end of the inner contact plate is rotatably connected to the side sound insulation plate through a rotating shaft.

[0011] Preferably, a mounting base is fixedly installed at the lower end of the side sound insulation panel, and multiple sets of movable wheels are rotatably connected to the lower surface of the mounting base. The bottom of the movable wheels is flush with the lower surface of the inner contact plate, and multiple sets of telescopic cylinders are rotatably installed on the inner contact plate. The upper end of the telescopic cylinder is rotatably connected to the side sound insulation panel.

[0012] Preferably, multiple sets of mounting frames are fixedly installed on the upper sound insulation plate. The upper end of each mounting frame is located on the upper side of the upper sound insulation plate and is fixedly installed with a ventilation mesh. The lower end of each mounting frame is located on the lower side of the upper sound insulation plate and is fixedly installed with sound insulation cotton. A ventilation fan is provided inside each mounting frame. Connecting plates are fixedly installed at both ends of the upper sound insulation plate. The lower end of each connecting plate is rotatably connected to the rotating plate. When the rotating plate is rotated to a vertical position, it can seal both ends of the U-shaped sound insulation cover.

[0013] A method for noise reduction and vibration damping of a coal mill includes the following steps: Step 1: Move the device using the wheels to position the side sound insulation panels on both sides of the coal mill; Step 2: Extend the telescopic cylinder until the lower end of the inner contact plate touches the horizontal ground; Step 3: Rotate the two end plates to close the two ends of the side sound insulation plate, so that the coal mill is completely surrounded. Step 4: The suction pump operates, causing the liquid inside the side sound insulation plate and the inner contact plate to enter the upper and lower positioning bladders; Step 5: The upper and lower positioning bladders expand and press against the surface of the coal mill, creating negative pressure on the adsorption plate and fixing the side sound insulation plate to the ground.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, a U-shaped soundproof cover is formed by an upper soundproof panel and two sets of side soundproof panels. When the coal mill is working, the U-shaped soundproof cover covers the outside of the coal mill. At this time, the side soundproof covers are located on both sides of the coal mill. This U-shaped soundproof cover forms a sound barrier outside the coal mill, thereby reducing the noise of the equipment during operation. Moreover, this device is set separately from the coal mill, so the sound insulation capability will not be damaged by the emergence of new noise points on the coal mill, ensuring the stability of the sound insulation function. Furthermore, this U-shaped soundproof cover can be adapted to coal mills of different sizes. In actual use, it is only necessary to push the U-shaped soundproof cover to the processing position of the coal mill. The position of the U-shaped soundproof cover is fixed by the adsorption plate adsorbing the ground. Compared with the soundproof devices that are installed on the coal mill body in the past, this soundproof device is simpler to install and quicker to disassemble.

[0015] 2. In this invention, after the U-shaped soundproof cover encloses the coal mill, the suction pump draws liquid into the upper and lower positioning bladders, causing the expanded upper and lower positioning bladders to press against the irregular surface of the coal mill. Through the limiting effect of the upper and lower positioning bladders, the mutual vibration between parts during the coal mill processing is further reduced, and the noise is further reduced. Furthermore, the upper and lower positioning bladders, pressed against both sides of the coal mill, also limit the connection between the U-shaped soundproof cover and the coal mill. The liquid filling the upper and lower positioning bladders is also an important part of the sound insulation layer, preventing noise from overflowing from the U-shaped soundproof cover. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the front view structure of the present invention; Figure 2 This is a partial schematic diagram of the structure at point A in this invention; Figure 3 This is a schematic diagram of the inner contact plate structure in this invention; Figure 4 For the present invention Figure 3 A partial structural diagram at point B in the middle; Figure 5 This is a structural schematic diagram of the present invention from a downward viewing angle; Figure 6 This is a cross-sectional view of the structure of the present invention; Figure 7 This is a cross-sectional view of the mounting frame in this invention; Figure 8 This is a flowchart illustrating the operation of the present invention.

[0018] In the attached diagram, the components represented by each number are as follows: 1. Upper sound insulation panel; 2. Side sound insulation panel; 3. Connecting plate; 4. Rotating plate; 5. Mounting base; 6. Casters; 7. Upper positioning bladder; 8. Lower positioning bladder; 9. Inner contact plate; 10. Telescopic cylinder; 11. Inner connecting pipe; 12. Rotating shaft; 13. Mounting frame; 14. Ventilation screen; 15. Sound insulation cotton; 16. Connecting pipe; 17. Suction pump; 18. Liquid guide pipe; 19. Adsorption plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides a technical solution: A noise reduction and vibration damping device for a coal mill includes two sets of side sound insulation panels 2, arranged in parallel. An upper sound insulation panel 1 is fixedly installed on the upper surface of the two sets of parallel side sound insulation panels 2. The upper sound insulation panel 1 and the side sound insulation panels 2 form an inverted U-shaped soundproof cover. Rotating plates 4 are rotatably installed at both ends of the U-shaped soundproof cover. A positioning component is installed inside the U-shaped soundproof cover, and the positioning component includes: The coal mill positioning component includes an upper positioning bladder 7, a lower positioning bladder 8, and a suction pump 17. The suction pump 17 can cause the upper positioning bladder 7 and the lower positioning bladder 8 to expand and wrap around the outer surface of the coal mill. The lower positioning component includes an inner contact plate 9, which is rotatably connected to the inner side of the side sound insulation plate 2. The lower surface of the inner contact plate 9 is provided with multiple sets of adsorption plates 19, and the suction pump 17 can make the lower surface of the adsorption plates 19 form a negative pressure.

[0021] In this invention, a U-shaped soundproof cover is formed by the upper soundproof panel 1 and two sets of side soundproof panels 2. When the coal mill is working, the U-shaped soundproof cover covers the outside of the coal mill. At this time, the side soundproof covers are located on both sides of the coal mill. This U-shaped soundproof cover forms a sound barrier outside the coal mill, thereby reducing the noise of the equipment during operation. Moreover, this device is set separately from the coal mill, so the sound insulation capability will not be damaged by the appearance of new noise points on the coal mill, ensuring the stability of the sound insulation function. In addition, this U-shaped soundproof cover can be adapted to coal mills of different sizes. In actual use, it is only necessary to push the U-shaped soundproof cover to the processing position of the coal mill. The position of the U-shaped soundproof cover is fixed by the adsorption plate 19 adsorbing the ground. Compared with the soundproof devices that are installed on the coal mill body in the past, this soundproof device is simpler to install and quicker to disassemble. In this invention, after the U-shaped soundproof cover encloses the coal mill, the suction pump 17 draws liquid into the upper positioning bladder 7 and the lower positioning bladder 8, causing the expanded upper positioning bladder 7 and the lower positioning bladder 8 to abut against the irregular surface of the coal mill. Through the limiting effect of the upper positioning bladder 7 and the lower positioning bladder 8, the mutual vibration between parts during the coal mill processing is further reduced, and the noise is further reduced. Furthermore, the upper positioning bladder 7 and the lower positioning bladder 8, pressed against both sides of the coal mill, also limit the connection between the U-shaped soundproof cover and the coal mill. The liquid filling the upper positioning bladder 7 and the lower positioning bladder 8 is also an important part of the sound insulation layer, preventing noise from overflowing from the U-shaped soundproof cover.

[0022] Each set of side sound insulation panels 2 is equipped with a coal mill positioning component. A suction pump 17 is fixedly installed at the upper end of the side sound insulation panel 2. The upper positioning bladder 7 is located below the suction pump 17 and is also fixedly connected to the side sound insulation panel 2. The lower positioning bladder 8 is fixedly connected to the inner contact plate 9 on the side sound insulation panel 2. In this invention, the upper positioning bladder 7 and the lower positioning bladder 8 are respectively located at the upper and lower ends of the side sound insulation panel 2. When the upper positioning bladder 7 and the lower positioning bladder 8 expand, they can simultaneously apply a squeezing force from the upper and lower sides of the coal mill, making the positioning of the coal mill by the upper positioning bladder 7 and the lower positioning bladder 8 more comprehensive and stable.

[0023] Multiple sets of connecting pipes 16 are provided between the lower positioning bladder 8 and the upper positioning bladder 7. The upper positioning bladder 7 is connected to the suction pump 17 via a liquid guide pipe 18. The suction pump 17 can pump gas into the upper positioning bladder 7 through the liquid guide pipe 18, and the gas in the upper positioning bladder 7 can enter the lower positioning bladder 8 through the connecting pipes 16. In this invention, the suction pump 17 inputs liquid into the upper positioning bladder 7 through the liquid guide pipe 18, and then the liquid enters the lower positioning bladder 8 through the connecting pipe 16, causing the lower positioning bladder 8 to expand. After the lower positioning bladder 8 expands to its limit, the upper positioning bladder 7 begins to expand. Through the downward pressure applied by the upper positioning bladder 7 and the upward pressure applied by the lower positioning bladder 7, the coal mill is clamped between the upper and lower positioning bladders, limiting the movement of the coal mill, reducing vibration between parts, and thus reducing noise.

[0024] Both the side soundproof panel 2 and the inner contact panel 9 are hollow, with their cavities filled with liquid. An inner connecting pipe 11 is fixedly installed at the upper end of the inner contact panel 9, and the upper end of the inner connecting pipe 11 is connected to the side soundproof panel 2. A connecting hose is provided at one end of the suction pump 17, and the connecting hose is introduced into the hollow cavity of the side soundproof panel 2. In this invention, the suction pump 17 draws the liquid from the side soundproof panel 2 and the inner contact panel 9 into the upper positioning bladder 7 through the connecting hose. The liquid in the inner contact panel 9 enters the side soundproof panel 2 through the inner connecting pipe 11, and then enters the suction pump 17 through the connecting hose.

[0025] The upper end of the adsorption plate 19 is connected to the hollow cavity of the inner contact plate 9, and a one-way valve is fixedly installed on it. When the suction pump 17 drains the liquid from the side sound insulation plate 2, the one-way valve creates a negative pressure on the lower side of the adsorption plate 19. The upper end of the inner contact plate 19 is rotatably connected to the side sound insulation plate 2 via a rotating shaft 12. In this invention, after all the liquid in the inner contact plate 19 has been drained, the suction pump 17 continues to operate. The adsorption effect causes the one-way valve to release the gas in the adsorption plate 19, creating a negative pressure on the adsorption plate 19, thereby adsorbing it onto the ground.

[0026] The lower end of the side soundproof panel 2 is fixedly mounted with a mounting base 5. Multiple sets of movable wheels 6 are rotatably connected to the lower surface of the mounting base 5. The bottom of the movable wheels 6 is flush with the lower surface of the inner contact plate 9. Multiple sets of telescopic cylinders 10 are rotatably mounted on the inner contact plate 9, and the upper ends of the telescopic cylinders 10 are rotatably connected to the side soundproof panel 2. When the soundproof cover needs to be moved, the telescopic cylinders 10 retract, causing the lower end of the inner contact plate 9 to move away from the ground. This allows the user to easily push the device using the movable wheels 6, preventing the inner contact plate 9 from interfering with the movement of the soundproof cover.

[0027] Multiple mounting frames 13 are fixedly installed on the upper soundproof panel 1. The upper end of the mounting frame 13 is located on the upper side of the upper soundproof panel 1 and is fixedly installed with a ventilation mesh 14. The lower end of the mounting frame 13 is located on the lower side of the upper soundproof panel 1 and is fixedly installed with sound insulation cotton 15. A ventilation fan is installed inside the mounting frame 13. Connecting plates 3 are fixedly installed at both ends of the upper soundproof panel 1. The lower end of the connecting plate 3 is rotatably connected to a rotating plate 4. When the rotating plate 4 is rotated to a vertical position, it can seal both ends of the U-shaped soundproof cover. In this invention, the ventilation fan inside the mounting frame 13 operates to dissipate heat from the equipment. During the heat dissipation process, the sound insulation cotton 15 acts as a sound insulation barrier in both the horizontal and vertical directions.

[0028] A method for noise reduction and vibration damping of a coal mill includes the following steps: Step 1: Move the device using the movable wheels 6 so that the side sound insulation panels 2 are positioned on both sides of the coal mill; Step 2: Extend the telescopic cylinder 10 so that the lower end of the inner contact plate 9 touches the horizontal ground; Step 3: Rotate the rotating plates 4 at both ends so that the rotating plates 4 close the two ends of the side sound insulation plate 2, so that the coal mill is completely surrounded. Step 4: The suction pump 17 operates, causing the liquid in the side sound insulation plate 2 and the inner contact plate 9 to enter the upper positioning bladder 7 and the lower positioning bladder 8; Step 5: The upper positioning bladder 7 and the lower positioning bladder 8 expand and press against the surface of the coal mill, causing the adsorption plate 19 to form a negative pressure, thus fixing the side sound insulation plate 2 to the ground.

[0029] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A noise reduction and vibration damping device for a coal mill, comprising a side sound insulation plate (2), characterized in that: The side sound insulation panels (2) are provided in two sets, which are arranged in parallel. An upper sound insulation panel (1) is fixedly installed on the upper surface of the two parallel sets of side sound insulation panels (2). The upper sound insulation panel (1) and the side sound insulation panels (2) form an inverted U-shaped soundproof cover. Rotating plates (4) are rotatably provided at both ends of the U-shaped soundproof cover. A positioning component is provided inside the U-shaped soundproof cover. The positioning component includes: A coal mill positioning component, comprising an upper positioning bladder (7), a lower positioning bladder (8), and a suction pump (17), wherein the suction pump (17) enables the upper positioning bladder (7) and the lower positioning bladder (8) to expand and wrap around the outer surface of the coal mill. The lower positioning component includes an inner contact plate (9), which is rotatably connected to the inner side of the side sound insulation plate (2). The lower surface of the inner contact plate (9) is provided with multiple sets of adsorption plates (19), and the suction pump (17) can make the lower surface of the adsorption plate (19) form a negative pressure.

2. The noise reduction and vibration damping device for a coal mill according to claim 1, characterized in that: Each of the side sound insulation panels (2) is equipped with a coal mill positioning component. The suction pump (17) is fixedly installed on the upper end of the side sound insulation panel (2). The upper positioning bladder (7) is located below the suction pump (17) and is also fixedly connected to the side sound insulation panel (2). The lower positioning bladder (8) is fixedly connected to the inner contact plate (9) on the side sound insulation panel (2).

3. The noise reduction and vibration damping device for a coal mill according to claim 2, characterized in that: Multiple sets of connecting pipes (16) are provided between the lower positioning bladder (8) and the upper positioning bladder (7). The upper positioning bladder (7) is connected to the suction pump (17) through a liquid guide pipe (18). The suction pump (17) can push gas into the upper positioning bladder (7) through the liquid guide pipe (18), and the gas in the upper positioning bladder (7) can enter the lower positioning bladder (8) through the connecting pipe (16).

4. The noise reduction and vibration damping device for a coal mill according to claim 1, characterized in that: Both the side sound insulation plate (2) and the inner contact plate (9) are hollow and filled with liquid. An inner connecting pipe (11) is fixedly installed at the upper end of the inner contact plate (9). The upper end of the inner connecting pipe (11) is connected to the side sound insulation plate (2). One end of the suction pump (17) is provided with a connecting hose, which is introduced into the hollow cavity of the side sound insulation plate (2).

5. The noise reduction and vibration damping device for a coal mill according to claim 4, characterized in that: The upper end of the adsorption plate (19) is connected to the hollow cavity of the inner contact plate (9), and a one-way air valve is fixedly installed on it. When the suction pump (17) discharges the liquid in the side sound insulation plate (2), it can make a negative pressure on the lower side of the adsorption plate (19) through the one-way air valve. The upper end of the inner contact plate (9) is rotatably connected to the side sound insulation plate (2) through the rotating shaft (12).

6. The noise reduction and vibration damping device for a coal mill according to claim 1, characterized in that: The lower end of the side sound insulation plate (2) is fixedly installed with a mounting base (5). The lower surface of the mounting base (5) is rotatably connected to multiple sets of moving wheels (6). The bottom of the moving wheels (6) is flush with the lower surface of the inner contact plate (9). Multiple sets of telescopic cylinders (10) are rotatably installed on the inner contact plate (9). The upper end of the telescopic cylinder (10) is rotatably connected to the side sound insulation plate (2).

7. The noise reduction and vibration damping device for a coal mill according to claim 1, characterized in that: Multiple sets of mounting frames (13) are fixedly installed on the upper soundproof panel (1). The upper end of the mounting frame (13) is located on the upper side of the upper soundproof panel (1) and is fixedly installed with a ventilation net (14). The lower end of the mounting frame (13) is located on the lower side of the upper soundproof panel (1) and is fixedly installed with sound insulation cotton (15). A ventilation fan is provided inside the mounting frame (13). Both ends of the upper soundproof panel (1) are fixedly installed with connecting plates (3). The lower end of the connecting plate (3) is rotatably connected to the rotating plate (4). When the rotating plate (4) is rotated to the vertical state, it can seal both ends of the U-shaped soundproof cover.

8. A method for noise reduction and vibration damping of a coal mill, applicable to any of the coal mill noise reduction and vibration damping devices according to any of claims 1-7, characterized in that, Including the following steps: Step 1: Push the device using the moving wheels (6) so that the side sound insulation panels (2) are positioned on both sides of the coal mill; Step 2: Extend the telescopic cylinder (10) so that the lower end of the inner contact plate (9) touches the horizontal ground; Step 3: Rotate the rotating plates (4) at both ends so that the rotating plates (4) close the two ends of the side sound insulation plate (2), so that the coal mill is completely surrounded; Step 4: The suction pump (17) operates, causing the liquid in the side sound insulation plate (2) and the inner contact plate (9) to enter the upper positioning bladder (7) and the lower positioning bladder (8); Step 5: The upper positioning bladder (7) and the lower positioning bladder (8) expand and press against the surface of the coal mill, so that the adsorption plate (19) forms a negative pressure, and the side sound insulation plate (2) is fixed to the ground.

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