Stirring shaft of active ash digester

Abstract

The utility model discloses a stirring shaft of an active ash digester, which comprises a main shaft and a plurality of stirring blades, the main shaft is connected with a spiral shaft of the active ash digester, the stirring blades are arranged at intervals along the axis direction of the main shaft, the stirring blades are connected with the main shaft through a connecting flange, and the connecting flange is fixedly connected with the main shaft. And the stirring blade is detachably connected with the connecting flange. According to the stirring shaft of the active ash digester disclosed by the utility model, the main shaft is connected with the stirring blades through the connecting flanges, so that compared with the prior art that the stirring blades are connected with the main shaft through connecting bolts, the influence on the strength of the main shaft is small, and the breakage phenomenon of the main shaft in operation can be reduced, thereby reducing the failure rate; the normal operation of the digester is ensured and the production efficiency is improved. The stirring blades are detachably connected with the connecting flange, so that the stirring blades are convenient to disassemble, assemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering equipment, and more specifically, to a stirring shaft of an active ash digester. Background Art

[0002] The sintering process in industries such as iron and steel and metallurgy requires the use of an active ash digester to digest active ash with water into active ash slurry for sintering process. The structure of the active ash digester mainly consists of a shell, a bracket, a water supply system, a spiral shaft, a stirring shaft, a coupling, a synchronizer, a speed reducer, a motor, etc. The water supply system is installed on the shell, and the spiral shaft and the stirring shaft are installed inside the shell. The two ends of the coupling are respectively connected to the spiral shaft and the synchronizer, and the synchronizer, the speed reducer, and the motor are installed on the transmission base. The stirring shaft is prone to scaling and has a large load during operation. The existing stirring blades are fixedly connected to the stirring shaft by bolts, which affects the strength of the stirring shaft and is prone to breakage during operation, resulting in a high failure rate and frequent maintenance, affecting production.

[0003] Therefore, how to reduce the occurrence of the fracture phenomenon of the stirring shaft of the active ash digester to reduce the failure rate and ensure the normal operation of the active ash digester has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a stirring shaft of an active ash digester to reduce the occurrence of the fracture phenomenon of the stirring shaft of the active ash digester, reduce the failure rate, and ensure the normal operation of the active ash digester.

[0005] To achieve the above purpose, the present utility model provides the following technical solutions:

[0006] A stirring shaft of an active ash digester, comprising:

[0007] A main shaft, connected to the spiral shaft of the active ash digester;

[0008] Stirring blades, with a plurality of them arranged at intervals along the axis direction of the main shaft. The stirring blades are connected to the main shaft through a connecting flange, the connecting flange is fixedly connected to the main shaft, and the stirring blades are detachably connected to the connecting flange.

[0009] Optionally, in the above-mentioned stirring shaft of the active ash digester, the connecting flange is welded to the main shaft, and the stirring blades are connected to the connecting flange through connecting bolts.

[0010] Optionally, in the above-mentioned stirring shaft of the active ash digester, two adjacent stirring blades are arranged in a circumferential dislocation along the main shaft, so that a plurality of stirring blades extend spirally along the axis direction of the main shaft.

[0011] Optionally, in the above-mentioned stirring shaft of the active ash digester, the cross-sectional areas of the respective stirring blades are the same or different.

[0012] Optionally, in the stirring shaft of the activated ash digester described above, the stirring blades include flat blades. The surface of the stirring blade is flat and the end is arc-shaped.

[0013] Optionally, in the stirring shaft of the activated ash digester described above, the stirring blades further include curved blades. The surface of the curved blade is curved and the end is arc-shaped.

[0014] Optionally, in the stirring shaft of the activated ash digester described above, the flat blades and the curved blades are arranged alternately and extend spirally along the axis direction of the main shaft.

[0015] Optionally, in the stirring shaft of the activated ash digester described above, the stirring blades are arranged in an annular array along the axis of the main shaft to form a plurality of stirring blade assemblies;

[0016] Along the axis direction of the main shaft, the various stirring blade assemblies are arranged at intervals.

[0017] Optionally, in the stirring shaft of the activated ash digester described above, a wear-resistant layer is provided on the stirring blades.

[0018] Optionally, in the stirring shaft of the activated ash digester described above, the main shaft is a hollow shaft.

[0019] As can be seen from the above solutions, for the stirring shaft of the activated ash digester disclosed in the present utility model, the main shaft is connected to the stirring blades through a connecting flange. Compared with the prior art in which the stirring blades are connected to the main shaft through connecting bolts, this has less impact on the strength of the main shaft, can reduce the occurrence of fracture of the main shaft during operation, thereby reducing the failure rate, ensuring the normal operation of the digester, and improving production efficiency. The detachable connection between the stirring blades and the connecting flange facilitates the disassembly, installation and replacement of the stirring blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of a stirring shaft of an activated ash digester in the prior art;

[0022] Figure 2 is a schematic structural diagram of a stirring shaft of an activated ash digester disclosed in an embodiment of the present utility model;

[0023] Figure 3 is Figure 1 the sectional view taken along A-A in

[0024] Among them, 10 is the main shaft, 20 is the stirring blade, 30 is the connecting flange, and 40 is the connecting bolt. Detailed implementation mode

[0025] The core of the present utility model is to disclose a stirring shaft of an activated ash digester, so as to reduce the occurrence of fracture of the stirring shaft of the activated ash digester, reduce the failure rate, and ensure the normal operation of the activated ash digester.

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figure 2 shown, the embodiment of the present utility model discloses a stirring shaft of an activated ash digester, including a main shaft 10 and stirring blades 20.

[0028] Among them, the main shaft 10 is rotationally connected to the activated ash digester. The number of the stirring blades 20 is multiple, and they are arranged at intervals along the axis direction of the main shaft 10. The stirring blades 20 are connected to the main shaft 10 through a connecting flange 30. The connecting flange 30 is fixedly connected to the main shaft 10, specifically by welding connection. The stirring blades 20 are detachably connected to the connecting flange 30.

[0029] In the prior art, the stirring blades 20 are directly connected to the main shaft 10 through connecting bolts 40, and holes need to be drilled on the main shaft 10. Specifically, as Figure 1 shown, it will reduce the strength of the main shaft 10. In the stirring shaft of the activated ash digester disclosed in the embodiment of the present utility model, the main shaft 10 is connected to the stirring blades 20 through a connecting flange 30. This method has less impact on the strength of the main shaft 10 compared with the prior art, can reduce the occurrence of fracture of the main shaft 10 during operation, thereby reducing the failure rate, ensuring the normal operation of the digester, and improving production efficiency. The detachable connection method between the stirring blades 20 and the connecting flange 30 is convenient for the disassembly, installation and replacement of the stirring blades 20.

[0030] In some specific embodiments, the main shaft 10 is welded to the connecting flange 30, the stirring blades 20 are connected to the connecting flange 30 through connecting bolts 40, and the stirring blades 20 and the connecting flange 30 are provided with mounting holes matching the connecting bolts 40. This method is convenient for disassembly and assembly.

[0031] In order to ensure sufficient stirring of the activated ash, in some specific embodiments, as Figure 2 and Figure 3As shown, two adjacent stirring blades 20 are arranged with a circumferential offset along the axis of the main shaft 10, so that a plurality of stirring blades 20 extend spirally along the axial direction of the main shaft 10, that is, a plurality of stirring blades 20 are arranged in a spiral shape as a whole on the main shaft 10.

[0032] In some specific embodiments, the shapes of the respective stirring blades 20 are the same and the cross-sectional areas are the same. In other specific embodiments, the cross-sectional areas of the respective stirring blades 20 are different, and can be specifically set according to the actual situation.

[0033] The stirring blade 20 includes a flat blade. The surface of the stirring blade 20 is flat and the end is arc-shaped. For example, the surface of the stirring blade 20 can be fan-shaped, and the respective stirring blades 20 are spirally arranged along the axial direction of the main shaft 10. The end of the stirring blade 20 can also be straight. In other specific embodiments, the stirring blade 20 further includes a curved surface blade. The surface of the curved surface blade is a curved surface and the end is arc-shaped. The flat blade and the curved surface blade can be arranged alternately or in a partitioned manner. For example, along the extending direction of the main shaft, the stirring blades 20 at one end are flat blades and the stirring blades 20 at the other end are curved surface blades. The curved surface blades include right-handed blades and left-handed blades.

[0034] In some specific embodiments, the stirring blades 20 are arranged in a ring array along the axis of the main shaft 10 to form a stirring blade assembly. Along the axial direction of the main shaft 10, the respective stirring blade assemblies are arranged at intervals. The distance between two adjacent stirring blade assemblies can be set to the same distance or different distances. For example, along the axial direction of the main shaft 10, the distance between two adjacent stirring blade assemblies gradually increases. The number of stirring blades 20 included in the stirring blade assembly can be different. For example, some stirring blade assemblies include four stirring blades 20 and some stirring blade assemblies include eight stirring blades 20.

[0035] For the stirring shaft of the activated ash digester disclosed in the embodiment of the present utility model, a wear-resistant layer is provided on the stirring blade 20, and the provision of the wear-resistant layer can extend the service life of the stirring blade 20.

[0036] For the stirring shaft of the activated ash digester disclosed in the embodiment of the present utility model, the main shaft 10 includes a solid shaft and a hollow shaft, and preferably a hollow shaft.

[0037] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

[0038] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. A method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0039] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0040] Unless otherwise clearly defined and limited, the terms "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention may be understood according to specific circumstances.

[0041] Specific examples are used herein to illustrate the principles and embodiments of the present invention. The description of the above embodiments is only for helping to understand the core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An agitation shaft of an active grey digester, characterized in that, Comprising: A main shaft (10), connected to the screw shaft of the activated ash digester; Stirring blades (20), with a plurality of them arranged at intervals along the axial direction of the main shaft (10). The stirring blades (20) are connected to the main shaft (10) through a connecting flange (30). The connecting flange (30) is fixedly connected to the main shaft (10), and the stirring blades (20) are detachably connected to the connecting flange (30).

2. The stirring shaft of the activated ash digester according to claim 1, characterized in that, The connecting flange (30) is welded to the main shaft (10), and the stirring blades (20) are connected to the connecting flange (30) through connecting bolts (40).

3. The stirring shaft of the activated ash digester according to claim 2, characterized in that, Two adjacent stirring blades (20) are arranged in a circumferential dislocation along the main shaft (10), so that the plurality of stirring blades (20) extend spirally along the axial direction of the main shaft (10).

4. The stirring shaft of the activated ash digester according to claim 1, wherein The cross-sectional areas of the respective stirring blades (20) are the same or different.

5. The stirring shaft of the activated ash digester according to claim 1, characterized in that, The stirring blade (20) includes a flat blade, the surface of the flat blade is flat, and the end is arc-shaped.

6. The stirring shaft of the activated ash digester according to claim 5, characterized in that, The stirring blade (20) further includes a curved blade, the surface of the curved blade is curved, and the end is arc-shaped.

7. The stirring shaft of the activated ash digester according to claim 6, characterized in that, The flat blades and the curved blades are arranged alternately and extend spirally along the axial direction of the main shaft (10).

8. The stirring shaft of the activated ash digester according to claim 1, characterized in that, The stirring blades (20) are arranged in a circular array along the axis of the main shaft (10) to form a plurality of stirring blade assemblies; Along the axial direction of the main shaft (10), the respective stirring blade assemblies are arranged at intervals.

9. The stirring shaft of the activated ash digester according to any one of claims 1-8, characterized in that, A wear-resistant layer is provided on the stirring blade (20).

10. The stirring shaft of the activated ash digester according to any one of claims 1-8, characterized in that, The main shaft (10) is a hollow shaft.

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