Reinforced rotating shaft for biological rotating disc water treatment device

Abstract

The utility model discloses a reinforced rotating shaft for a biological rotating disc water treatment device, which is characterized in that a plurality of strip-shaped reinforcing ribs are uniformly welded on the periphery of the middle part of a rotating shaft main body, the reinforcing ribs are parallel to the length direction of the rotating shaft main body and are radially arranged outwards along the radial direction, and two ends of each reinforcing rib are detachably connected with an inner disc through a plurality of connecting pieces; the inner disc is not fixedly welded with the rotating shaft main body, so that the size of the rotating shaft is obviously reduced, the whole rotating shaft main body welded with the reinforcing ribs is conveniently subjected to stress relief annealing, the stress concentration of the welding surfaces of the reinforcing ribs and the rotating shaft main body can be further eliminated, and the accident of stress concentration fracture at a welding seam after long-time work is avoided; meanwhile, the reinforcing ribs can improve the strength of the middle of the rotating shaft body and can also serve as fixing bases of the two inner discs in the middle, and therefore the inner discs can be detached to be replaced and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a reinforced rotating shaft for a biological turntable water treatment device. Background Art

[0002] The biofilm method is a wastewater aerobic biological treatment technology. As a biofilm method sewage treatment device, the bio-rotating disc water treatment device has been widely used in the treatment of domestic sewage, garbage leachate and industrial sewage. The bio-rotating disc water treatment device generally consists of a reaction tank, a rotating shaft mounted above the reaction tank, and a bio-rotating disc mounted on the outer periphery of the rotating shaft and rotating with it. The disc-shaped biofilm sheet of the bio-rotating disc is partially immersed in the sewage in the reaction tank. The microorganisms attached to the disc-shaped biofilm sheet are used to form a biofilm on the disc-shaped biofilm sheet to degrade the organic matter in the sewage and achieve the purpose of purification. With the widespread application of this technology, in order to increase the sewage treatment capacity of a single bio-rotating disc water treatment device, more disc-shaped biofilm sheets need to be loaded on the rotating shaft or the weight of the disc-shaped biofilm sheets needs to be increased, which requires a higher load on the rotating shaft.

[0003] The existing rotating shaft has outer discs installed at both ends and two inner discs installed in the center, that is, the four discs divide the rotating shaft into three parts, and a number of disc-shaped biofilm sheets are fixed in the two parts between the adjacent outer discs and the inner discs, so that more disc-shaped biofilm sheets can be arranged. However, since the middle part of the rotating shaft bears the largest bending moment, the middle part of the rotating shaft is easy to break after long-term operation, and the inner discs are usually welded to the outer periphery of the rotating shaft. The welds at the inner discs are easy to break, causing the inner discs to fall off. The rotating shaft body with welded inner discs is large in size, and it is not convenient to stress-relieve annealing the entire rotating shaft body. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing rotating shaft for biological rotary disk water treatment devices, such as the welds of the inner disc welded on the middle part of the rotating shaft body being easily broken, the applicant provides a reinforced rotating shaft for biological rotary disk water treatment devices, which has a plurality of reinforcing ribs in the middle part of the rotating shaft, and the inner disc is detachably connected to the reinforcing ribs through a connecting piece, so as to avoid the middle part of the rotating shaft from breaking and extend the service life.

[0005] The technical solutions and beneficial effects adopted by the utility model are as follows:

[0006] A reinforced rotating shaft for a biological turntable water treatment device has a plurality of long strip reinforcing ribs uniformly welded on the outer periphery of the middle part of the rotating shaft body. The reinforcing ribs are arranged parallel to the length direction of the rotating shaft body and radially outwardly arranged.

[0007] As a further improvement of the above technical solution:

[0008] The two ends of the reinforcing rib are detachably connected to the inner disc through a plurality of connecting pieces.

[0009] The two ends of the reinforcing rib are provided with flanges, and the reinforcing rib is in a "concave" shape as a whole.

[0010] The utility model has a plurality of reinforcing ribs in the middle of the rotating shaft, and the inner disc is not welded and fixed to the rotating shaft body, thus significantly reducing the volume of the rotating shaft, facilitating stress relief annealing of the entire rotating shaft body welded with reinforcing ribs, further eliminating stress concentration on the welding surface of the reinforcing ribs and the rotating shaft body, avoiding stress concentration fracture accidents at the weld after long-term operation, and especially avoiding fracture accidents in the center of the body where the bending moment is the largest. At the same time, the reinforcing ribs can increase the strength of the middle part of the rotating shaft body, and can also serve as a fixing seat for the two inner discs in the middle, so that the inner discs can be disassembled for replacement and maintenance.

[0011] The connecting piece is in a vertical "L" shape, one side of which is welded to a side surface of the inner disc close to the reinforcing rib, and the other side is fixed to the flange through a fastener.

[0012] The number of the reinforcing ribs is 3-16.

[0013] The connecting piece is arranged in an "L" shape, so as to facilitate the connection of the inner discs and reinforcing ribs which are arranged perpendicular to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model after the inner disc and the outer disc are assembled;

[0015] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0016] Figure 3 It is a schematic diagram of the structure of the utility model;

[0017] Figure 4 It is the front view of the utility model;

[0018] Figure 5 for Figure 4 Cross-sectional view of the middle BB;

[0019] Figure 6 for Figure 5 Enlarged view of middle C;

[0020] Figure 7 It is a schematic diagram of the structure of the connection between the rotating shaft body and the spline sleeve assembly;

[0021] Figure 8 It is a structural schematic diagram of a spline jacket assembly;

[0022] Fig. 9 It is a schematic diagram of the structure of the connection between the driving shaft head, the spline inner sleeve assembly and the fixing ring;

[0023] Fig.10 It is a schematic diagram of the structure of the connection between the driven shaft head, the spline inner sleeve assembly and the fixed ring.

[0024] In the figure: 1. driving shaft head; 2. driven shaft head; 3. rotating shaft body; 4. connecting device; 41. spline sleeve assembly; 411. spline sleeve; 412. connecting rod; 42. spline inner sleeve assembly; 421. spline inner sleeve; 43. fixing ring; 5. inner disc; 6. reinforcing rib; 61. flange; 7. connecting piece; 8. outer disc. DETAILED DESCRIPTION

[0025] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4 As shown, the utility model is a reinforced rotating shaft for a biological turntable water treatment device, including a central rotating shaft body 3 and a driving shaft head 1 and a driven shaft head 2 respectively fixed to the inner wall of the two ends of the rotating shaft body 3 through two connecting devices 4. The rotating shaft body 3 is a hollow structure, which can significantly reduce the overall weight of the biological turntable water treatment device. Two outer discs 8 are sleeved on the outer periphery of the two ends of the rotating shaft body 3, and a plurality of inner discs 5 are evenly sleeved between the two outer discs 8 and on the outer periphery of the rotating shaft body 3. In this embodiment, two inner discs 5 are provided, and the rotating shaft body 3, the inner disc 5, the outer disc 8, the driving shaft head 1, the driven shaft head 2, and the connecting device 4 are all concentrically arranged.

[0027] like Figure 3-10 As shown, the connecting device 4 includes a spline inner sleeve component 42 and a spline outer sleeve component 41 sleeved on the outer circumference thereof. The outer circumference of the end of the active shaft head 1 and the driven shaft head 2 inserted into the rotating shaft body 3 is welded with the spline inner sleeve component 42; a fixing ring 43 is fixed on the outer side of the spline inner sleeve component 42, and the spline outer sleeve component 41 is welded on the inner wall of the rotating shaft body 3. When the active shaft head 1 and the driven shaft head 2 are inserted into the two ends of the rotating shaft body 3, the inner teeth of the central hole of the spline outer sleeve component 41 and the outer teeth of the spline inner sleeve component 42 are closely matched to achieve circumferential meshing, and the fixing ring 43 is fixed to the outer side of the spline outer sleeve component 41 by fasteners, thereby achieving the fixing of the active shaft head 1 and the driven shaft head 2 with the spline outer sleeve component 41 to avoid loosening and disengagement after long-term work. After removing the fasteners, the active shaft head 1 and the driven shaft head 2 can be replaced, which is very convenient to operate and saves costs. In this embodiment, the spline sleeve assembly 41 includes two identical spline sleeves 411 arranged at a certain distance from each other and a plurality of connecting rods 412 connecting the two, and the spline inner sleeve assembly 42 includes two spline inner sleeves 421 arranged corresponding to the spline sleeves 411, thereby increasing the welding area between the spline sleeve assembly 41 and the rotating shaft body 3, uniformizing the force bearing area of ​​the spline sleeve assembly 41 and the spline inner sleeve assembly 42, and ensuring the stability of the connection between the active shaft head 1, the driven shaft head 2 and the rotating shaft body 3.

[0028] like Figure 2-4 As shown, a plurality of long strip reinforcing ribs 6 are uniformly welded in the circumferential direction of the middle part of the rotating shaft body 3, and flanges 61 are provided at both ends thereof. The reinforcing ribs 6 are in a "concave" shape as a whole. The reinforcing ribs 6 are parallel to the length direction of the rotating shaft body 3, and two inner discs 5 are sleeved on the outer periphery of the rotating shaft body 3 and abut against the flanges 61. The connecting piece 7 welded and fixed to the corresponding flange 61 on the inner side of the inner disc 5 is fixed to the flange 61 through a fastener. In this embodiment, the connecting piece 7 is in a vertical "L" shape, one side of which is welded to the inner side of the inner disc 5, and the other side is fixed to the flange 61 through a fastener, so that the inner disc 5 is detachably sleeved on the outer periphery of the rotating shaft body 3. The utility model is provided with a plurality of reinforcing ribs 6 in the middle of the rotating shaft, and the inner disc 5 is not welded and fixed to the rotating shaft body 3, thus significantly reducing the volume of the rotating shaft, facilitating stress relief annealing of the entire rotating shaft body 3 welded with the reinforcing ribs 6, further eliminating stress concentration at the welding surface of the reinforcing ribs 6 and the rotating shaft body 3, avoiding stress concentration fracture accidents at the weld after long-term operation, and especially avoiding fracture accidents at the center of the body where the bending moment is the largest. At the same time, the reinforcing ribs 6 can further increase the strength of the middle part of the rotating shaft body 3, and can also serve as a fixing seat for the two inner discs 5 in the middle, so that the inner discs 5 can be disassembled for replacement and maintenance.

[0029] In actual use, a number of disc-shaped biofilm sheets (not shown in the figure) are arranged between the adjacent outer discs 8 and inner discs 5 of the rotating shaft. The rotating shaft sets up the disc-shaped biofilm sheets above the reaction tank. The active shaft head 1 of the rotating shaft is connected to the reducer (not shown in the figure). The reducer drives the rotating shaft to rotate, so that the disc-shaped biofilm sheets are partially immersed in the sewage in the reaction tank, and a biofilm is formed on the disc-shaped biofilm sheets to degrade organic matter in the sewage, thereby achieving the purpose of purification.

[0030] The above description is an explanation of the utility model, not a limitation of the utility model. The utility model can be modified in any form without violating the spirit of the utility model.

Claims

1. A reinforced rotating shaft for a biological rotary disc water treatment device, characterized in that: A plurality of long strip-shaped reinforcing ribs (6) are uniformly welded on the outer periphery of the middle portion of the rotating shaft body (3); the reinforcing ribs (6) are arranged parallel to the length direction of the rotating shaft body (3) and are radially arranged outward.

2. The reinforced rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The two ends of the reinforcing rib (6) are detachably connected to the inner disc (5) via a plurality of connecting pieces (7).

3. The reinforced rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The reinforcing rib (6) has flanges (61) at both ends and is in a concave shape as a whole.

4. The reinforced rotating shaft for the biological rotary disc water treatment device according to claim 3 is characterized in that: The connecting piece (7) is in a vertical "L" shape, one side of which is welded to a side surface of the inner disc (5) close to the reinforcing rib (6), and the other side is fixed to the flange (61) via a fastener.

5. The reinforced rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The number of the reinforcing ribs (6) is 3-16.

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