Protective cover at shaft seal

Abstract

The utility model is applicable to the technical field of mechanical seal, and provides a shaft seal protective cover, which comprises a base, a plurality of protective cover bodies and a limiting piece, each protective cover body comprises a cover plate tightly attached to the base and a cover blade connected with the cover plate and extending and protruding towards the direction far away from the base, and the plurality of cover blades are enclosed to form a space for mounting a shaft. The limiting piece penetrates through the cover plate and is rotationally connected with the base, the limiting piece is rotated to achieve closing or scattering of the cover blades, when the cover blades are closed, the cover blades are assembled with the mounting shaft, and when the cover blades are scattered, the cover blades are separated from the mounting shaft; according to the utility model, the connection with the mounting shaft can be realized by only placing the mounting shaft in the space and closing the cover blades, the limitation to the size of the space and the position of the product is completely avoided, the mounting can be directly carried out as long as the space is available, the mounting operation is convenient and rapid, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals, and particularly relates to a protective cover at the shaft seal. Background Art

[0002] For a structure that requires the use of a shaft and a protective cover at the shaft seal, during assembly, due to various reasons, the width of the protective cover cannot be determined. After actual assembly, it is necessary to measure the area where the protective cover needs to be installed. After obtaining the data results through measurement, the shaft and the shaft seal at this location need to be designed and installed with a protective cover, and the steps are very cumbersome.

[0003] For the existing protective covers at the shaft seal, they all need to be installed in advance. Due to assembly adjustment and component matching, the installation position of the protective cover is not fixed, resulting in limited installation process. Secondly, after installation, it may be necessary to disassemble other components for adjustment or reinstallation, increasing the workload. And after installation, patch cutting and welding are also required, and the risk of deformation during the patch cutting and welding process is large, especially near rotating components, which may cause safety accidents.

[0004] After arriving at the site, the difficulty of replacing the protective cover is increased due to insufficient on-site disassembly conditions. Finally, for the old-structured protective cover, it is necessary to cut an avoidance notch without disassembling other components, which limits the installation method and may affect the sealing performance.

[0005] Therefore, there are defects in the existing technology. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiency of difficult installation in the above-mentioned existing technology, and provide a protective cover at the shaft seal.

[0007] The utility model is realized as follows: a protective cover at the shaft seal includes a base, a plurality of protective cover bodies arranged on the base, and a limiting member connecting the base and the protective cover bodies. Each protective cover body includes a cover plate closely attached to the base, and a cover leaf connected to the cover plate and protruding away from the base. The plurality of cover leaves enclose a space for installing the shaft. The limiting member passes through the cover plate and is rotatably connected to the base. By rotating the limiting member, the plurality of cover leaves are brought together or spread apart. When the plurality of cover leaves are brought together, the assembly with the installation shaft is achieved. When the plurality of cover leaves are spread apart, the separation from the installation shaft is achieved.

[0008] Furthermore, each cover plate is provided with a notch adapted to the limiting member, and the notch extends from the edge position of the cover plate gradually towards the inner position of the cover plate.

[0009] Furthermore, each of the notches includes an arc portion and an extension portion. One extension portion is connected to each side of the arc portion, and the limiting member abuts against the arc portion through the extension portion.

[0010] Furthermore, each of the limiting members includes a bolt and a nut. A plurality of threaded holes adapted to the bolts are formed in the base. The arc portion in the notch is installed at a position corresponding to the threaded holes. The bolt sequentially passes through the threaded hole and the notch from one side of the base, and the nut is connected to the bolt from the other side of the base and abuts against the cover plate. By screwing the nut, the fixation or loosening between the cover plate and the base can be achieved.

[0011] Furthermore, each of the cover leaves is a polygon structure with a curved arc design.

[0012] Furthermore, each of the cover leaves is perpendicular to the corresponding cover plate.

[0013] Furthermore, at least four protective covers are provided.

[0014] A protective cover at the shaft seal provided by the present utility model realizes the closing or spreading of a plurality of the cover leaves through the limiting member. When the cover leaves are closed, an installation space for the installation shaft can be formed. As long as the installation shaft is placed in this space, the connection with the installation shaft can be achieved by closing the cover leaves, which is completely not restricted by the space size and the position of the product. As long as there is space for installation, it can be directly installed, and the installation operation is convenient and fast, greatly improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] The following drawings are only intended to illustrate and explain the present utility model schematically and do not limit the scope of the present utility model.

[0017] Figure 1 It is a schematic structural diagram provided by the present utility model.

[0018] Figure 2 It is a schematic structural diagram of the protective cover in the present utility model.

[0019] Figure 3 It is a schematic structural diagram of the notch in the present utility model.

[0020] Figure 4 It is a schematic structural diagram of the cooperation between the limiting member and the base in the present utility model.

[0021] Figure 5 It is a schematic structural diagram when the protective cover body of the present utility model is spread out.

[0022] Explanation of the reference numerals in the attached drawings: 1. Base; 11. Threaded hole; 12. Through hole; 2. Protective cover body; 21. Cover plate; 211. Notch; 212. Arc part; 213. Extension part; 22. Cover leaf; 3. Limiting member; 31. Bolt; 32. Nut. Specific embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Please refer to Figures 1 - 5 , a protective cover at the shaft seal disclosed in the utility model, includes a base 1, a plurality of protective cover bodies 2 provided on the base 1, and a limiting member 3 connecting the base 1 and the protective cover bodies 2. A through hole 12 adapted to install the shaft is provided on the base 1. After passing the installation shaft through the through hole 12, the base 1 and the protective cover bodies 2 are fixed by the limiting member 3, so that the protective cover bodies 2 are adapted to the shaft seal of the installation shaft, playing a role in protecting and sealing. Among them, the base 1, the protective cover bodies 2 and the limiting member 3 are all detachably connected.

[0025] Each of the protective cover bodies 2 includes a cover plate 21 closely attached to the base 1 and cover leaves 22 connected to the cover plate 21 and extending and protruding away from the base 1. As Figures 2 - 3 shown, each of the cover leaves 22 is perpendicular to the corresponding cover plate 21, which can stabilize the connection between the cover leaves 22 and the cover plate 21. A plurality of the cover leaves 22 surround a space for the installation shaft, and this space is preferably a circular structure. The limiting member 3 passes through the cover plate 21 and is rotatably connected to the base 1. By rotating the limiting member 3, the plurality of cover leaves 22 can be closed or spread out. When the plurality of cover leaves 22 are closed, the assembly with the installation shaft is realized, and when the plurality of cover leaves 22 are spread out, the separation from the installation shaft is realized.

[0026] Specifically, each of the limiting members 3 includes a bolt 31 and a nut 32. A plurality of threaded holes 11 adapted to the bolt 31 are formed in the base 1 around the through hole 12, and the bolt 31 is connected to the threaded hole 11. Preferably, the end of the bolt 31 with a head is located on the side of the base 1 away from the cover blade 22, that is, the bolt 31 enters the threaded hole 11 from the side of the base 1 away from the cover blade 22. Continue to rotate the bolt 31 until the screw part of the bolt 31 passes through the threaded hole 11 and reaches the other side of the base 1 provided with the cover blade 22, and the nut 32 is connected to the screw part of the bolt 31 on the other side of the base 1.

[0027] Each of the cover plates 21 is provided with a notch 211 adapted to the bolt 31. As Figure 3 shown, the notch 211 extends from the edge position of the cover plate 21 gradually towards the inner position of the cover plate 21. The bolt 31 passes through the threaded hole 11 and the notch 211 in sequence from one side of the base 1, and the nut 32 is connected to the bolt 31 from the other side of the base 1 and abuts against the cover plate 21. When connecting the protective cover body and the base 1, align the notch 211 with the screw part of the bolt 31 so that the screw part of the bolt 31 abuts against the innermost side of the notch 211, and then rotate the nut 32 until the nut 32 abuts against the cover plate 21, which can play a role in fixing the protective cover body and the base 1.

[0028] More preferably, each of the notches 211 includes an arc part 212 and an extension part 213. The arc part 212 is installed corresponding to the position of the threaded hole 11. Both sides of the arc part 212 are connected with an extension part 213, and the screw part of the bolt 31 specifically passes through the extension part 213 and abuts against the arc part 212. The overall depth length of the notch 211 is greater than the diameter of the screw part of the bolt 31, which can ensure that the screw part can completely enter the notch 211 and stabilize the connection between the protective cover body and the base 1.

[0029] When the protective cover at the shaft seal needs to be matched with the shaft seal at the installation shaft, first rotate the nut 32 so that the nut 32 moves along the screw part of the bolt 31 and away from the cover plate 21. In this process, it is not necessary to completely rotate the nut 32 until it is separated from the bolt 31. It is only necessary to loosen the connection between the nut 32 and the cover plate 21, that is, the entire protective cover body can be loosened, and each cover blade 22 can be rotated to disperse each cover blade 22. As Figure 5As shown, after expanding the space enclosed by several of the cover leaves 22, the mounting shaft is passed through the through hole 12. After aligning several of the cover leaves 22 with the shaft seal of the mounting shaft, each of the cover leaves 22 is rotated again so that each of the cover leaves 22 moves closer to the mounting shaft, gradually reducing the mounting space. Until each of the cover leaves 22 abuts against the mounting shaft, the nut 32 is turned again so that the nut 32 moves towards the cover plate 21 until the nut 32 abuts against the cover plate 21, then the shaft seal protection cover of the present invention can be fixed to the mounting shaft, completing the sealing protection of the shaft seal of the mounting shaft. In this process, each of the cover leaves 22 has a polygonal structure with a curved arc design. In this embodiment, each of the cover leaves 22 includes, but is not limited to, a parallelogram shape to adapt to the structures of most mounting shafts. And there are at least four of the protective cover bodies 2, which are designed with multiple pieces. It is equivalent to decomposing the shaft seal protection cover of the present invention into several modules, and each module can be adjusted and installed independently. During installation, fine adjustments can be made according to the actual space and shape of the shaft seal to ensure the fitting degree and sealing performance of the shaft seal protection cover, and stability can also be maintained.

[0030] In summary, the shaft seal protection cover of the present invention can adjust the mounting space in real time according to the size of the on-site mounting shaft, has high compatibility, and is easy to operate. There is no need to disassemble other components for adjustment or reinstallation, greatly reducing the on-site workload and improving the operation efficiency.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shaft seal protective cover, characterized in that: The invention comprises a base (1), a plurality of protective covers (2) arranged on the base (1), and a limiting member (3) connecting the base (1) and the protective covers (2); each of the protective covers (2) comprises a cover plate (21) tightly attached to the base (1), and a cover leaf (22) connected to the cover plate (21) and extending and protruding in a direction away from the base (1); the plurality of cover leaves (22) are mutually arranged to form a space of a mounting shaft; the limiting member (3) passes through the cover plate (21) and is rotatably connected to the base (1); the limiting member (3) is rotated to realize the closing or spreading of the plurality of cover leaves (22); when the plurality of cover leaves (22) are closed together, they are assembled with the mounting shaft; when the plurality of cover leaves (22) are spread apart, they are separated from the mounting shaft.

2. The shaft seal protection cover according to claim 1, characterized in that: Each of the cover plates (21) is provided with a notch (211) adapted to fit the limiting member (3), and the notch (211) extends from an edge position of the cover plate (21) toward an inner position of the cover plate (21).

3. A shaft seal protection cover according to claim 2, characterized in that: Each of the notches (211) comprises an arc-shaped portion (212) and an extension portion (213), and both sides of the arc-shaped portion (212) are connected to an extension portion (213), and the limiting member (3) abuts against the arc-shaped portion (212) through the extension portion (213).

4. A shaft seal protection cover according to claim 3, characterized in that: Each of the limiting members (3) comprises a bolt (31) and a nut (32); a plurality of threaded holes (11) adapted to the bolts (31) are provided on the base (1); the arc-shaped portion (212) in the notch (211) is installed corresponding to the position of the threaded hole (11); the bolt (31) passes through the threaded hole (11) and the notch (211) in sequence from one side of the base (1); the nut (32) is connected to the bolt (31) from the other side of the base (1) and abuts against the cover plate (21); the cover plate (21) and the base (1) can be fixed or loosened by turning the nut (32).

5. The shaft seal protection cover according to claim 1, characterized in that: Each of the cover blades (22) is a polygonal structure designed in a curved arc shape.

6. The shaft seal protection cover according to claim 5, characterized in that: Each of the cover blades (22) and the corresponding cover plate (21) are perpendicular to each other.

7. The shaft seal protection cover according to claim 1, characterized in that: The protective cover bodies (2) are provided with at least four.

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