Coal vertical mill rocker arm sealing flexible connection device

Abstract

The utility model discloses a coal vertical mill rocker arm seal soft connection device, including rocker arm (1), casing (2) and set up in the nozzle ring (3) of casing (2), be equipped with seal frame (4) on casing (2), be equipped with with seal frame (4) cooperation's seal guide plate (5) and seal strip (6) on rocker arm (1), realized the effective sealing between rocker arm (1) and casing (2), significantly reduced the air leakage of external air to the mill, reduced the oxygen content in system, thereby reduced the risk of coal dust explosion, the design of sealing structure and the motion trail of rocker arm (1) are matched, will not produce the hindrance to the up and down movement of rocker arm (1), has guaranteed the normal operation of coal vertical mill, owing to the special structure design of seal frame (4) and relevant sealing parts, avoided the accumulation of material in the inside of soft connection, eliminated the hidden danger of coal dust spontaneous combustion, improved the security of equipment operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of vertical mills. Specifically, this utility model relates to a sealing flexible connection device for the rocker arm of a coal vertical mill. Background Technology

[0002] As a grinding equipment widely used in the large-scale production of non-metallic minerals, the rocker arm of the coal vertical mill plays a crucial role in transmitting hydraulic grinding pressure to the grinding rollers. The rocker arm needs to pass through the inside and outside of the coal vertical mill shell and move synchronously with the up and down movement of the grinding rollers. This requires an effective seal between the rocker arm and the shell, while ensuring that the normal movement of the rocker arm is not obstructed. The coal vertical mill system has extremely high requirements for sealing, and the internal state of the mill must be kept sealed to reduce the leakage of external air into the mill. If air leakage occurs, it will lead to an increase in the oxygen content in the coal vertical mill system. Coal powder in an oxygen-rich environment has a great risk of explosion, which seriously threatens production safety.

[0003] A specification published on October 29, 2021, with application number 202120645018.2, discloses a novel vertical mill grinding roller door sealing structure. The structure includes an arc plate fixed to the mill housing, a silicone rubber sealing ring fitted onto the outer edge of the mill rocker arm and fixed to the arc plate, and a protective plate located between the grinding roller and the silicone rubber sealing ring and fixed to the mill housing. The outer edge of the silicone rubber sealing ring has an integrally formed flange ring, which is bolted to the arc plate. The inner edge of the silicone rubber sealing ring has an integrally formed retaining ring, which is fixed to the mill rocker arm by a retaining ring. This invention uses a semi-tire-shaped silicone rubber sealing ring to fill the gap between the mill rocker arm and the mill housing. The silicone rubber sealing ring has excellent compensation capabilities within any range of motion of the mill rocker arm, completely eliminating air leakage. The protective plate prevents the mixing air inside the mill from eroding the silicone rubber sealing ring, extending its service life.

[0004] Currently, traditional vertical mill rocker arm soft connections mostly adopt a tire-shaped design. During use, material accumulation is prone to occur at the bottom of this structure. Since coal vertical mills process coal powder, the accumulated coal powder is very likely to spontaneously combust, posing a serious safety hazard. Therefore, the traditional structure is not suitable for the application scenarios of coal vertical mills. Utility Model Content

[0005] The present invention aims to provide a sealing flexible connection device for the rocker arm of a coal vertical mill with good sealing performance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a rocker arm sealing soft connection device for a coal vertical mill, comprising a rocker arm, a housing, and a nozzle ring disposed within the housing. The rocker arm is provided with a sealing structure, and the housing is provided with a sealing structure that cooperates with the sealing structure. The sealing structure is a sealing frame disposed on the rocker arm, and the sealing structure is a sealing guide plate and a sealing strip disposed within the housing.

[0007] The sealing guide plate is divided into an upper sealing plate and a lower sealing plate. The sealing frame is divided into an upper frame plate that cooperates with the upper sealing plate and a lower frame plate that cooperates with the lower sealing plate. Side sealing plates that cooperate with sealing strips are provided on both sides of the sealing frame.

[0008] The upper sealing plate is disposed inside the housing, and the lower sealing plate is disposed on the nozzle ring.

[0009] The upper sealing plate is distributed in an inwardly concave arc shape on the inner wall of the shell, and the lower sealing plate is disposed in an outwardly convex arc shape on the nozzle ring.

[0010] The curvature of the upper and lower sealing plates is the same as the rotation curvature of the rocker arm.

[0011] The side sealing plate is fan-shaped, and the sealing frame has arc-shaped tracks on both sides, with the side sealing plate slidably connected to the inside of the tracks.

[0012] The side sealing plate is provided with a sealing rubber plate that cooperates with the sealing strip.

[0013] The track is equipped with baffles at both ends.

[0014] The sealing guide plate is provided with a sealing rubber plate that cooperates with the sealing frame.

[0015] The technical effects of this utility model are as follows: it achieves an effective seal between the rocker arm and the housing, significantly reduces air leakage from the outside into the mill, lowers the oxygen content in the system, thereby reducing the risk of coal powder explosion. The design of the sealing structure matches the movement trajectory of the rocker arm and does not hinder the up-and-down movement of the rocker arm, ensuring the normal operation of the coal vertical mill. Due to the special structural design of the sealing frame and related sealing components, it avoids the accumulation of materials inside the soft connection, eliminates the hidden danger of coal powder spontaneous combustion, and improves the safety of equipment operation. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of a rocker arm sealing flexible connection device for a coal vertical mill according to this utility model; Figure 2 for Figure 1 A schematic diagram of the sealing strip of a rocker arm sealing flexible connection device for a coal vertical mill.

[0017] The following are marked in the diagram: 1. Rocker arm; 2. Housing; 3. Nozzle ring; 4. Sealing frame; 41. Upper frame plate; 42. Lower frame plate; 43. Side sealing plate; 5. Sealing guide plate; 51. Upper sealing plate; 52. Lower sealing plate; 6. Sealing strip; 7. Track; 8. Baffle. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0019] Please see Figure 1-2 A flexible sealing connection device for a coal vertical mill rocker arm includes a rocker arm 1, a housing 2, and a nozzle ring 3 disposed within the housing 2. The rocker arm 1 has a sealing structure, and the housing 2 has a sealing structure that cooperates with the sealing structure. The sealing structure is a sealing frame 4 disposed on the rocker arm 1, and the sealing structure is a sealing guide plate 5 and a sealing strip 6 disposed within the housing 2. This device achieves effective sealing between the rocker arm 1 and the housing 2, significantly reducing air leakage from the outside into the mill, lowering the oxygen content within the system, and thus reducing the risk of coal powder explosion. The design of the sealing structure matches the movement trajectory of the rocker arm 1, without hindering the up-and-down movement of the rocker arm 1, ensuring the normal operation of the coal vertical mill. Due to the special structural design of the sealing frame 4 and related sealing components, material accumulation inside the flexible connection is avoided, eliminating the hidden danger of coal powder spontaneous combustion and improving the safety of equipment operation.

[0020] The sealing guide plate 5 is divided into an upper sealing plate 51 and a lower sealing plate 52. The sealing frame 4 is divided into an upper frame plate 41 that cooperates with the upper sealing plate 51 and a lower frame plate 42 that cooperates with the lower sealing plate 52. The sealing frame 4 is provided with side sealing plates 43 on both sides that cooperate with the sealing strip 6. The upper sealing plate 51 cooperates with the upper frame plate 41 to seal the upper part, the lower sealing plate 52 cooperates with the lower frame plate 42 to seal the lower part, and the side sealing plates 43 cooperate with the sealing strip 6 to seal the two sides, forming a complete sealing structure, which can effectively form a complete sealing system.

[0021] The upper sealing plate 51 is set inside the housing 2, and the lower sealing plate 52 is set on the nozzle ring 3; the structure inside the vertical mill is effectively used in conjunction with the sealing frame 4 for sealing, and the structure is reasonably set.

[0022] The upper sealing plate 51 is distributed in an inwardly concave arc shape on the inner wall of the housing 2, and the lower sealing plate 52 is arranged in an outwardly convex arc shape on the nozzle ring 3; so that when the grinding roller enters the vertical mill, the shapes of the upper sealing plate 51 and the lower sealing plate 52 will not obstruct the entry and exit of the rocker arm 1.

[0023] The curvature of the upper sealing plate 51 and the lower sealing plate 52 is the same as the rotation curvature of the rocker arm 1; the structural design matches the movement trajectory of the rocker arm 1, and will not hinder the up and down movement of the rocker arm 1, thus ensuring the normal operation of the coal vertical mill.

[0024] The side sealing plate 43 is fan-shaped, and the sealing frame 4 has arc-shaped tracks 7 on both sides. The side sealing plate 43 is slidably connected to the inner side of the track 7. When the rocker arm 1 enters the vertical mill, the side sealing plate 43 will be tightly attached to the sealing strip 6, and the side sealing plate 43 will move along the track 7. This can prevent the side sealing plate 43 from rubbing against the sealing strips 6 on both sides when the rocker arm 1 moves, thus reducing wear.

[0025] The side sealing plate 43 is provided with a sealing rubber plate that cooperates with the sealing strip 6 to increase the sealing effect.

[0026] The two ends of the track 7 are equipped with baffles 8 to prevent the side sealing plates 43 from falling off from the track 7.

[0027] The sealing guide plate 5 is equipped with a sealing rubber plate that cooperates with the sealing frame 4 to improve the sealing effect.

[0028] Working principle: First, install the sealing frame 4 of the rocker arm 1, ensuring its accurate position. The curvature of the upper sealing plate 51 and the lower sealing plate 52 of the sealing frame 4 is consistent with the upper and lower arc movement trajectory of the rocker arm 1. On the upper side of the vertical mill housing 2, corresponding to the position of the upper sealing plate 51 of the sealing frame 4 of the rocker arm 1, install the arc-shaped housing 2 sealing guide plate 5, making the gap between the housing 2 sealing guide plate 5 and the upper sealing plate 51 of the sealing frame 4 of the rocker arm 1 very small. A sealing rubber plate is installed on the outside of the sealing seat guide plate, thus forming the lower sealing structure. Corresponding to the lower sealing plate 52 of the sealing frame 4 of the rocker arm 1, install the arc-shaped sealing seat guide plate at the nozzle ring 3. This sealing seat guide plate is in contact with the lower sealing plate 52 of the sealing frame 4 of the rocker arm 1, with a very small gap. A sealing rubber plate is installed on the outside of the sealing seat guide plate, thus forming the lower sealing structure. On the vertical mill housing 2, corresponding to the positions on both sides of the sealing frame 4 of the rocker arm 1, install the sealing strip 6, making the sealing strip 6 in close contact with the side sealing plates 43 on both sides of the sealing frame 4 of the rocker arm 1.

[0029] The technical effects of this utility model are as follows: it achieves an effective seal between the rocker arm 1 and the housing 2, significantly reduces air leakage from the outside into the mill, lowers the oxygen content in the system, thereby reducing the risk of coal powder explosion. The design of the sealing structure matches the movement trajectory of the rocker arm 1 and does not hinder the up-and-down movement of the rocker arm 1, ensuring the normal operation of the coal vertical mill. Due to the special structural design of the sealing frame 4 and related sealing components, the accumulation of materials inside the soft connection is avoided, eliminating the hidden danger of coal powder spontaneous combustion and improving the safety of equipment operation.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A rocker arm sealing flexible connection device for a coal vertical mill, comprising a rocker arm (1), a housing (2), and a nozzle ring (3) disposed within the housing (2), characterized in that: The rocker arm (1) is provided with a sealing structure, and the housing (2) is provided with a closed structure that cooperates with the sealing structure. The sealing structure is a sealing frame (4) provided on the rocker arm (1), and the closed structure is a sealing guide plate (5) and a sealing strip (6) provided in the housing (2).

2. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 1, characterized in that: The sealing guide plate (5) is divided into an upper sealing plate (51) and a lower sealing plate (52). The sealing frame (4) is divided into an upper frame plate (41) that cooperates with the upper sealing plate (51) and a lower frame plate (42) that cooperates with the lower sealing plate (52). The sealing frame (4) has side sealing plates (43) on both sides that cooperate with the sealing strip (6).

3. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 2, characterized in that: The upper sealing plate (51) is disposed inside the housing (2), and the lower sealing plate (52) is disposed on the nozzle ring (3).

4. A flexible sealing connection device for a coal vertical mill rocker arm according to claim 2 or 3, characterized in that: The upper sealing plate (51) is distributed in an inwardly concave arc shape on the inner wall of the shell (2), and the lower sealing plate (52) is arranged in an outwardly convex arc shape on the nozzle ring (3).

5. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 4, characterized in that: The curvature of the upper sealing plate (51) and the lower sealing plate (52) is the same as the rotation curvature of the rocker arm (1).

6. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 2, characterized in that: The side sealing plate (43) is fan-shaped, and the sealing frame (4) has arc-shaped tracks (7) on both sides. The side sealing plate (43) is slidably connected to the inside of the track (7).

7. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 6, characterized in that: The side sealing plate (43) is provided with a sealing rubber plate that cooperates with the sealing strip (6).

8. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 6, characterized in that: The track (7) is provided with baffles (8) at both ends.

9. The sealing flexible connection device for the rocker arm of a coal vertical mill according to claim 1, characterized in that: The sealing guide plate (5) is provided with a sealing rubber plate that cooperates with the sealing frame (4).

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