Vertical mill rocker arm sealing device

Abstract

The utility model provides a rocker arm sealing device of a vertical mill, which comprises a rocker arm with a rotating shaft; the machine shell is provided with an opening, a cavity is formed in the machine shell, the opening is communicated with the cavity, one end of the rocker arm is located in the cavity of the machine shell, the other end of the rocker arm extends out of the cavity from the opening, and a rotating shaft of the rocker arm penetrates through the machine shell and extends out of the machine shell; the sealing mechanisms are arranged at the opening of the machine shell, the sealing mechanisms are connected with the machine shell and the rocker arm at the same time, and the sealing mechanisms can isolate the cavity from the external environment. The sealing device is provided with a plurality of sealing mechanisms, dust can be effectively prevented from entering the sealing cavity, sealing air is arranged for blowing the sealing cavity, materials which cannot be blown can be smoothly discharged, and the service life of the sealing device is prolonged. Sealing between the vertical mill shell and the rocker arm is reliably achieved, safe operation of the mill is guaranteed, and then the service life of the mill is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical roller mill grinding, in particular to a vertical mill rocker arm sealing device. Background Art

[0002] As an ideal large-scale grinding equipment, vertical mill is widely used in cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It integrates crushing, drying, grinding, grading and conveying, with high production efficiency, and can grind block, granular and powdered raw materials into the required powdered materials.

[0003] During the normal operation of a positive pressure vertical mill, the fluctuations in the grinding material layer will cause the vertical mill roller to swing up and down during operation. Therefore, there will be a certain space between the vertical mill rocker arm and the casing (which can be called a sealed chamber) to avoid collision and friction between the rocker arm and the casing during the vibration of the grinding roller, which may cause damage to the mill. During operation, the mill is exposed to a high concentration of dust-laden gas, and dust and materials are very likely to enter the sealed chamber. After accumulation, it is very easy to cause blockage, wear and even cracking, thereby disrupting the normal operation of the mill and causing certain economic losses. Utility Model Content

[0004] The purpose of the utility model is to provide a vertical mill rocker arm sealing device, which realizes the sealing between the vertical mill housing and the rocker arm.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vertical mill rocker arm sealing device, comprising: a rocker arm, the rocker arm having a rotating shaft; a casing, the casing having an opening, the interior of the casing having a cavity, the opening being connected to the cavity, one end of the rocker arm being located in the cavity of the casing, and the other end of the rocker arm extending from the opening to the outside of the cavity, the rotating shaft of the rocker arm passing through the casing and extending to the outside of the casing; a sealing mechanism, the sealing mechanism being arranged at the opening of the casing, the sealing mechanism being connected to the casing and the rocker arm at the same time, and the sealing mechanism being capable of isolating the cavity from the external environment.

[0006] Furthermore, one end of the rocker arm is sleeved with a cylindrical shell, and the cylindrical shell is connected to the casing.

[0007] Furthermore, the sealing mechanism further includes a first sealing assembly, and the connection between the housing and the cylindrical shell is sealed by the first sealing assembly.

[0008] Furthermore, the sealing mechanism also includes a second sealing component, which is located in the casing and connected to the casing and the rocker arm. The second sealing component can separate the cavity to form a first chamber and a second chamber, the first chamber is connected to the opening, the second chamber is connected to the first chamber, and the rotating shaft of the rocker arm is located in the second chamber.

[0009] Furthermore, the sealing mechanism also includes two third sealing assemblies, which are respectively connected to both sides of the rotating shaft of the rocker arm, and the third sealing assemblies can seal the rotating shaft of the rocker arm.

[0010] Furthermore, the first sealing assembly includes: a first sealing strip, a second sealing strip, a first shell sealing strip, a second shell sealing strip, an outer sealing plate, a baffle and a rocker arm baffle plate; the gap between the casing and the upper side of the cylindrical shell is sealed by the first sealing strip, and the gap between the casing and the left and right sides of the cylindrical shell is sealed by the second sealing strip, the first shell sealing strip and the second shell sealing strip; the gap between the casing and the lower side of the cylindrical shell is sealed by the outer sealing plate; the rocker arm baffle plate is connected to the lower end of the cylindrical shell, and the position of the rocker arm baffle plate corresponds to the outer sealing plate; the baffle is provided on the casing and is located below the outer sealing plate.

[0011] Furthermore, the second sealing assembly includes: an upper sealing plate, a rocker sealing plate and a protective plate;

[0012] The upper sealing plate is arranged in the cavity, the rocker arm sealing plate is connected to the rocker arm, the upper sealing plate is connected to the inner wall of the casing, the upper sealing plate and the rocker arm sealing plate are arranged opposite to each other, and there is a gap between the upper sealing plate and the rocker arm sealing plate; the protective plate is connected to the rocker arm.

[0013] Furthermore, the third sealing assembly includes a casing seal, which includes a labyrinth sealing ring and a felt sealing ring; the labyrinth sealing ring and the felt sealing ring can seal the gap between the casing and the rotating shaft of the rocker arm, and the labyrinth sealing ring is provided with a sealed air inlet.

[0014] Furthermore, it also includes sealed air ducts, air inlet ducts and clean air ducts, the number of the sealed air ducts is 4, two of which are connected to the second chamber, and the other two sealed air ducts are respectively connected to the sealed air inlets of the two casing seals, and the clean air duct and the sealed air duct are both connected to the air inlet duct.

[0015] Furthermore, the outer sealing plate and the rocker arm material stop plate are both cladding-welded anti-wear plates.

[0016] Analysis shows that the utility model discloses a vertical mill rocker arm sealing device, which has a multi-sealing mechanism, can effectively prevent dust from entering the sealing chamber, and is provided with sealing air to blow it, and can also make the material that cannot be blown out smoothly, and reliably realize the sealing between the vertical mill casing and the rocker arm, ensure the safe operation of the mill, and thus increase the service life of the mill, and the utility model has a simple and clear structure, reliable performance, and is easy to assemble, install, adjust and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] Figure 1 A schematic cross-sectional view of the structure of an embodiment of the present invention.

[0019] Figure 2 A schematic side view of the structure of an embodiment of the present invention.

[0020] Figure 3 A schematic cross-sectional view of the structure of the rotating shaft of an embodiment of the present invention.

[0021] Figure 4 A schematic diagram of the connection of a sealed air duct according to an embodiment of the present invention.

[0022] Explanation of the accompanying drawings: 1. Casing; 2. Rocker arm; 3. First sealing strip; 4. Rocker arm material baffle plate; 5. Outer sealing plate; 6. Protective plate; 7. Baffle; 8. Upper sealing plate; 9. Rocker arm sealing plate; 10. Second sealing strip; 11. First shell sealing strip; 12. Second shell sealing strip; 13. Casing seal; 14. Sealing air duct; 15. Cleaning air duct. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0024] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numbers and letters to refer to features in the drawings. Like or similar numbers in the drawings and the description have been used to refer to like or similar parts of the present invention. As used herein, the terms "first," "second," "third," and "fourth" are used interchangeably to distinguish one component from another and are not intended to indicate the position or importance of individual components.

[0026] like Figure 1-Figure 4 As shown, according to an embodiment of the present invention, a vertical mill rocker arm sealing device is provided, comprising: a rocker arm 2, the rocker arm 2 having a rotating shaft; a casing 1, the casing 1 having an opening, the interior of the casing 1 having a cavity, the opening being connected to the cavity, one end of the rocker arm 2 being located in the cavity of the casing 1, and the other end of the rocker arm 2 extending from the opening to the outside of the cavity, the rotating shaft of the rocker arm 2 passing through the casing 1 and extending to the outside of the casing 1; a sealing mechanism, the sealing mechanism being arranged at the opening of the casing 1, the sealing mechanism being connected to the casing 1 and the rocker arm 2 at the same time, and the sealing mechanism being capable of isolating the cavity from the external environment.

[0027] The rocker arm 2 located in the cavity of the housing 1 is isolated from the outside world by a sealing mechanism, thereby preventing external dust from entering the cavity and contaminating the rocker arm 2, thereby affecting its use.

[0028] Preferably, one end of the rocker arm 2 is sleeved with a cylindrical shell, and the cylindrical shell is connected to the casing 1.

[0029] Preferably, the sealing mechanism further includes a first sealing assembly, which seals the connection between the housing 1 and the cylindrical housing. The sealing mechanism further includes a second sealing assembly, which is located within the housing 1 and connected to the housing 1 and the rocker arm 2. The second sealing assembly is capable of separating the cavity into a first chamber and a second chamber, the first chamber communicating with the opening, the second chamber communicating with the first chamber, and the rotating shaft of the rocker arm 2 being located within the second chamber. The sealing mechanism further includes two third sealing assemblies, each connected to either side of the rotating shaft of the rocker arm 2, capable of sealing the rotating shaft of the rocker arm 2.

[0030] Since both ends of the shaft extend from the housing 1, the shaft can be sealed by two third sealing components to isolate it from the outside.

[0031] The above-mentioned first sealing component can seal the gap between the rocker arm 2 and the casing 1, the second sealing component can divide the cavity of the casing 1 again, thereby further sealing the position of the rotating shaft of the rocker arm 2, and the third sealing component can further seal the rotating shaft of the rocker arm 2, thereby achieving triple sealing.

[0032] Preferably, the first sealing assembly includes: a first sealing strip 3, a second sealing strip 10, a first housing sealing strip 11, a second housing sealing strip 12, an outer sealing plate 5, a baffle 7, and a rocker arm retaining plate 4. The gap between the housing 1 and the upper side of the cylindrical housing is sealed by the first sealing strip 3, and the gaps between the housing 1 and the left and right sides of the cylindrical housing are sealed by the second sealing strip 10, the first housing sealing strip 11, and the second housing sealing strip 12. The gap between the housing 1 and the lower side of the cylindrical housing is sealed by the outer sealing plate 5. The rocker arm retaining plate 4 is connected to the lower end of the cylindrical housing and is positioned corresponding to the outer sealing plate 5. The baffle 7 is provided on the housing 1 and is located below the outer sealing plate 5.

[0033] The first sealing strip 3 and the second sealing strip 10 can be rubber sealing strips. In actual use, any type of rubber that meets the requirements can be selected. The sealing strips are fixed through the base plate and the pressure plate. Specifically, the sealing strips are set between the base plate and the pressure plate and are fastened to the casing 1 by bolts. The specific installation position can be adjusted as needed.

[0034] The baffle 7 can prevent the material from being blown into the cavity from below in the working room.

[0035] The above-mentioned rocker arm material baffle plate 4 can form a complete front side material baffle plate with the outer sealing plate 5. Since the rocker arm 2 will swing during operation, the rocker arm material baffle plate 4 will swing with the rocker arm 2, thereby continuously preventing dust from entering the cavity from the outer sealing plate 5.

[0036] Preferably, the second sealing assembly includes: an upper sealing plate 8, a rocker arm sealing plate 9 and a protective plate 6; the upper sealing plate 8 is arranged in the cavity, the rocker arm sealing plate 9 is connected to the rocker arm 2, the upper sealing plate 8 is connected to the inner wall of the casing 1, the upper sealing plate 8 and the rocker arm sealing plate 9 are arranged opposite to each other, and there is a gap between the upper sealing plate 8 and the rocker arm sealing plate 9; the protective plate 6 is connected to the rocker arm 2, and a rubber plate is usually provided on the protective plate 6.

[0037] Preferably, the third sealing assembly includes a casing seal 13, which includes a labyrinth sealing ring and a felt sealing ring. The labyrinth sealing ring and the felt sealing ring can seal the gap between the casing 1 and the rotating shaft of the rocker arm 2, and a sealed air inlet is provided on the labyrinth sealing ring.

[0038] Preferably, the machine further includes sealed air ducts 14 and clean air ducts. The number of sealed air ducts 14 is four, two of which are connected to the second chamber, and the other two are connected to the sealed air inlets of the two housing seals 13. The clean air duct 15 and the sealed air duct 14 are both connected to the air inlet pipe. The clean door is located in a convenient position for material discharge and transportation.

[0039] The outer sealing plate 5 and the rocker arm retaining plate 4 are both cladding-welded anti-wear plates.

[0040] The outer sealing plate 5 and the rocker arm retaining plate 4 can be made of ordinary steel plates. When surfacing wear-resistant plates are selected, the wear resistance of surfacing wear-resistant plates is better than that of ordinary steel plates, which can increase the service life of the device.

[0041] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the present invention provides a vertical mill rocker arm sealing device, which has a multi-channel sealing mechanism, can effectively prevent dust from entering the sealed cavity, and is provided with a sealing wind to blow it, and can also make the material that cannot be blown out smoothly discharged, and reliably realize the sealing between the vertical mill casing 1 and the rocker arm 2, ensure the safe operation of the mill, and thus improve the service life of the mill, and has the characteristics of simple and clear structure, reliable performance, and easy assembly, installation, adjustment and maintenance.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A vertical mill rocker arm sealing device, characterized in that: include: a rocker arm, the rocker arm having a rotating shaft; a housing, wherein the housing has an opening, and a cavity is formed inside the housing, the opening is communicated with the cavity, one end of the rocker arm is located in the cavity of the housing, and the other end of the rocker arm extends from the opening to the outside of the cavity, and a rotating shaft of the rocker arm passes through the housing and extends outside the housing; A sealing mechanism is provided at the opening of the housing, the sealing mechanism is connected to the housing and the rocker arm at the same time, and the sealing mechanism can isolate the cavity from the external environment.

2. A vertical mill rocker arm sealing device according to claim 1, characterized in that: One end of the rocker arm is sleeved with a cylindrical shell, and the cylindrical shell is connected to the casing.

3. The vertical mill rocker arm sealing device according to claim 2, characterized in that: The sealing mechanism further includes a first sealing component, and the connection between the housing and the cylindrical shell is sealed by the first sealing component.

4. The vertical mill rocker arm sealing device according to claim 3, characterized in that: The sealing mechanism also includes a second sealing component, which is located in the casing and connected to the casing and the rocker arm. The second sealing component can separate the cavity to form a first chamber and a second chamber, the first chamber is connected to the opening, the second chamber is connected to the first chamber, and the rotating shaft of the rocker arm is located in the second chamber.

5. The vertical mill rocker arm sealing device according to claim 4, characterized in that: The sealing mechanism further includes two third sealing assemblies, which are respectively connected to both sides of the rotating shaft of the rocker arm. The third sealing assemblies can seal the rotating shaft of the rocker arm.

6. The vertical mill rocker arm sealing device according to claim 4, characterized in that: The first sealing assembly includes: a first sealing strip, a second sealing strip, a first shell sealing strip, a second shell sealing strip, an outer sealing plate, a baffle and a rocker arm baffle; The gap between the housing and the upper side of the cylindrical shell is sealed by the first sealing strip, and the gaps between the housing and the left and right sides of the cylindrical shell are sealed by the second sealing strip, the first shell sealing strip, and the second shell sealing strip; The gap between the housing and the lower side of the cylindrical shell is sealed by the outer sealing plate; The rocker arm material stopper is connected to the lower end of the cylindrical shell, and the position of the rocker arm material stopper corresponds to the outer sealing plate; The baffle is arranged on the casing and is located below the outer sealing plate.

7. The vertical mill rocker arm sealing device according to claim 6, characterized in that: The second sealing assembly includes: an upper sealing plate, a rocker sealing plate and a protective plate; The upper sealing plate is arranged in the cavity, the rocker arm sealing plate is connected to the rocker arm, the upper sealing plate is connected to the inner wall of the casing, the upper sealing plate and the rocker arm sealing plate are arranged opposite to each other, and a gap is formed between the upper sealing plate and the rocker arm sealing plate; The protective plate is connected to the rocker arm.

8. The vertical mill rocker arm sealing device according to claim 5, characterized in that: The third sealing assembly includes a housing seal, and the housing seal includes a labyrinth sealing ring and a felt sealing ring; The labyrinth sealing ring and the felt sealing ring can seal the gap between the housing and the rotating shaft of the rocker arm, and the labyrinth sealing ring is provided with a sealed air inlet.

9. The vertical mill rocker arm sealing device according to claim 8, characterized in that: It also includes sealed air ducts, air inlet ducts and clean air ducts. The number of the sealed air ducts is 4, two of which are connected to the second chamber, and the other two are respectively connected to the sealed air inlets of the two casing seals. The clean air duct and the sealed air duct are both connected to the air inlet duct.

10. The vertical mill rocker arm sealing device according to claim 6, characterized in that: The outer sealing plate and the rocker arm material blocking plate are both cladding-welded anti-wear plates.

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