Sealing device for vertical mill pull rod

Abstract

The utility model discloses a sealing device for a vertical mill pull rod, which comprises a pull rod sleeve wrapping the pull rod and a sealing sleeve in sealing fit with the pull rod sleeve, an end face seal is arranged on the outer wall of the pull rod sleeve, and the end face seal sequentially comprises a sealing guide ring, a wear-resistant packing A and a fluororubber seal. The sealing sleeve has an elastic adjusting function; a pull rod sleeve is sealed layer by layer through a sealing sleeve with six seals, so that external materials and air are prevented from being sucked into the vertical mill from an upper gap, a spring flange is welded at the upper part of the sealing sleeve, an end face sealing flange is welded at the bottom of the sealing sleeve, a wear-resistant packing is mounted on the end face sealing flange, and a mirror surface flange is welded on a lower box body; the mirror surface flange is fixed through the adjusting spring, the automatic compensation function is achieved through the spring, and air dust cannot enter the vertical mill through the lower space through end face sealing.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to a sealing device for a vertical mill pull rod. Background Art

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

[0003] During the operation of the vertical mill, the hydraulic cylinder controls the pull rod to drive the grinding roller to rise and press down. The pull rod transmits the force of the hydraulic cylinder to the grinding roller, and the grinding roller grinds the material on the grinding disc.

[0004] The pull rod passes through the sealing box from the outside of the vertical mill and enters the inside of the vertical mill. The gap between the vertical rod and the sealing box is equipped with a sealing device. Due to the complex working conditions and the design defects of the existing sealing device, reliable sealing cannot be achieved, resulting in the powder particles generated during the grinding process and easily leaking from the gap between the pull rod and the sealing box. At the same time, the external air will be sucked into the vertical mill from the leak. Leakage and air leakage will affect the working time of the mill, increase the consumption of wear-resistant materials, pollute the on-site environment, and cause unplanned shutdowns in serious cases. Utility Model Content

[0005] The utility model provides a sealing device for a pull rod of a vertical mill, which is used to overcome the defect of insufficient sealing performance between the vertical rod and the sealing box of the vertical mill in the prior art.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The utility model discloses a sealing device for a pull rod of a vertical mill, comprising a pull rod sleeve wrapping the pull rod and a sealing sleeve sealingly matched with the pull rod, an end face seal is arranged on the outer wall of the pull rod sleeve, the end face seal comprises a sealing guide ring, a wear-resistant packing A and a fluororubber seal in sequence, and the sealing sleeve has an elastic adjustment function.

[0008] Furthermore, the end face seals are arranged in pairs from the middle portion to the end portion of the pull rod sleeve.

[0009] Furthermore, the sealing sleeve comprises an upper flange and a lower flange, the lower flange is provided with a wear-resistant packing B, the wear-resistant packing B is in contact with the mirror end face flange below it, and an adjustment spring is provided between the mirror end face flange and the upper flange.

[0010] Furthermore, screws are welded on the outer side of the mirror end face flange, and the upper flange is provided with a hook for fixing the adjusting spring.

[0011] Furthermore, the upper flange and the lower flange are respectively welded to two ends of the sealing sleeve.

[0012] The beneficial effects achieved by the utility model are: the rod sleeve is sealed layer by layer by six sealed sealing sleeves, ensuring that external materials and air will not be sucked into the vertical mill from the upper gap, the upper part of the sealing sleeve is welded with a spring flange, the bottom is welded with an end face sealing flange, and a wear-resistant packing is installed on the end face sealing flange. A mirror flange is welded on the lower box body, screws are welded on the outside of the mirror flange, fixed with an adjustment spring, and adjusted to the best position, the spring plays an automatic compensation function, and the end face is sealed to prevent air dust from entering the vertical mill through the lower space. At the same time, due to the irregular left and right up and down reciprocating motion of the vertical mill rod, the application can adapt itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 1. Pull rod sleeve; 2. Sealing sleeve; 3. Adjusting spring; 4. Sealing guide ring; 5. Wear-resistant packing A; 6. Fluororubber seal; 7. Wear-resistant packing B; 8. Mirror end face flange. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] like Figure 1-2 As shown, a sealing device for a vertical mill pull rod comprises a pull rod sleeve 1 for wrapping the pull rod and a sealing sleeve 2 for sealingly cooperating with the pull rod. An end face seal is arranged on the outer wall of the pull rod sleeve 1. The end face seal comprises a sealing guide ring 4, a wear-resistant packing A5 and a fluororubber seal 6 in sequence. The sealing sleeve 2 has an elastic adjustment function.

[0019] The end face seals are arranged in pairs from the middle to the end of the tie rod sleeve 1.

[0020] The sealing sleeve 2 comprises an upper flange and a lower flange. The lower flange is provided with a wear-resistant packing B7, which contacts the mirror end face flange 8 below the lower flange. An adjusting spring 3 is provided between the mirror end face flange 8 and the upper flange.

[0021] Screws are welded on the outer side of the mirror end face flange 8 , and a hook is provided on the upper flange for fixing the adjusting spring 3 .

[0022] Working principle: The tie rod is held by the tie rod sleeve 1, and sealed layer by layer by the six-sealed sealing sleeve 2 on the outside, ensuring that external materials and air will not be sucked into the vertical mill from the upper gap. The upper flange is welded on the sealing sleeve 2, and the lower flange is welded on the bottom. The packing 5 is installed on the sealing sleeve 2, and the mirror end face flange 8 is welded on the box below. Screws are welded on the outside of the mirror end face flange 8 to fix the adjusting spring 3. The adjusting spring 3 plays the role of automatic compensation, and the end face seal is used to prevent air dust from entering the vertical mill through the lower space.

[0023] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The terms used in the description of this application are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

Claims

1. A sealing device for a vertical mill pull rod, characterized in that: It includes a pull rod sleeve that wraps the pull rod and a sealing sleeve that seals with the pull rod. An end face seal is arranged on the outer wall of the pull rod sleeve. The end face seal includes a sealing guide ring, a wear-resistant packing A and a fluororubber seal in sequence. The sealing sleeve has an elastic adjustment function.

2. The sealing device for a vertical mill pull rod according to claim 1, characterized in that: The end face seals are arranged in pairs from the middle portion to the end portion of the pull rod sleeve.

3. The sealing device for a vertical mill pull rod according to claim 1, characterized in that: The sealing sleeve comprises an upper flange and a lower flange. The lower flange is provided with a wear-resistant packing B, which contacts the mirror end face flange below it. An adjusting spring is provided between the mirror end face flange and the upper flange.

4. The sealing device for a vertical mill pull rod according to claim 3, characterized in that: Screws are welded on the outer side of the mirror end face flange, and a hook is provided on the upper flange for fixing the adjusting spring.

5. The sealing device for a vertical mill pull rod according to claim 3, characterized in that: The upper flange and the lower flange are respectively welded to the two ends of the sealing sleeve.

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