Combined rotating shaft for biological rotating disc water treatment device

Abstract

The utility model discloses a combined rotating shaft for a biological rotating disc water treatment device, shaft heads at two ends are detachably connected to two ends of a hollow rotating shaft main body through a connecting device, the connecting device comprises a spline inner sleeve assembly and a spline outer sleeve assembly, the spline outer sleeve assembly is welded on the inner wall of the rotating shaft main body, and the spline outer sleeve assembly is welded on the rotating shaft main body. A spline inner sleeve assembly is welded to the periphery of one end of the shaft head, outer teeth of the spline inner sleeve assembly are meshed with inner teeth of a central hole of the spline outer sleeve assembly, a fixing ring arranged on the outer side of the spline inner sleeve assembly is fixed to the spline outer sleeve assembly through a fastener, and loosening and disengaging or weld joint breakage after long-time work are avoided. The driving shaft head and the driven shaft head can be pulled out of the rotating shaft body after the fastener is detached, replacement is convenient, operation is easy, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a combined 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 rotating shaft body of the existing rotating shaft usually adopts a hollow cylinder to reduce the overall load of the device. The two ends of the rotating shaft body are usually interference fit or welded to the outer periphery of the driving shaft head and the driven shaft head. The reducer is connected to the driving shaft head to drive the rotating shaft to rotate. However, after long-term load operation, the rotating shaft body and the driving shaft head and the driven shaft head will loosen or the weld will break, which greatly reduces the service life of the device. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing hollow rotating shaft body for biological rotary disk water treatment devices, in which the driving shaft head and the driven shaft head are interference fit or welded at both ends and are prone to loosening or weld breakage, the applicant provides a combined rotating shaft for biological rotary disk water treatment devices, which achieves circumferential fixation by meshing the spline inner sleeve assembly welded on the driving shaft head and the driven shaft head with the spline outer sleeve assembly welded on the inner wall of the rotating shaft body, thereby avoiding loosening of the driving shaft head and the driven shaft head or weld breakage during rotation, thereby extending the service life.

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

[0006] A combined rotating shaft for a biological turntable water treatment device, wherein the shaft heads at both ends are detachably connected to the two ends of a hollow rotating shaft body through a connecting device, the connecting device includes a spline inner sleeve assembly and a spline outer sleeve assembly, the inner wall of the rotating shaft body is welded with a spline outer sleeve assembly, the outer periphery of one end of the shaft head is welded with a spline inner sleeve assembly, the outer teeth of the spline inner sleeve assembly are meshed with the inner teeth of the central hole of the spline outer sleeve assembly, and a fixing ring arranged on the outside of the spline inner sleeve assembly is fixed to the spline outer sleeve assembly by a fastener.

[0007] When the driving shaft head and the driven shaft head are inserted into the two ends of the rotating shaft body, the inner teeth of the central hole of the spline outer sleeve assembly mesh with the outer teeth of the spline inner sleeve assembly and are locked in the circumferential direction. The fixing ring is fixed to the outside of the spline outer sleeve assembly by fasteners, thereby achieving radial fixation of the driving shaft head, the driven shaft head and the rotating shaft body to avoid loosening or weld breakage after long-term work; after removing the fasteners, the driving shaft head and the driven shaft head can be pulled out of the rotating shaft body, which is easy to replace, simple to operate and cost-saving.

[0008] As a further improvement of the above technical solution:

[0009] The spline housing assembly comprises two identical spline housings which are arranged at a certain distance and a plurality of connecting rods connecting the two spline housings.

[0010] The spline inner sleeve component comprises two spline inner sleeves arranged corresponding to the spline outer sleeves.

[0011] The inner teeth of the spline outer sleeve component and the outer teeth of the spline inner sleeve component are triangular, rectangular or arc-shaped spline teeth.

[0012] Increasing the number of spline outer sleeves and spline inner sleeves and spacing them a certain distance apart can increase the welding area between the spline outer sleeve assembly and the rotating shaft body, and the connection area between the spline outer sleeve assembly and the spline inner sleeve assembly, thereby ensuring the stability of the connection between the active shaft head, the driven shaft head and the rotating shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model after the inner disc and the outer disc are assembled;

[0014] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0015] Figure 3 It is a schematic diagram of the structure of the utility model;

[0016] Figure 4 It is the front view of the utility model;

[0017] Figure 5 for Figure 4 Cross-sectional view of the middle BB;

[0018] Figure 6 for Figure 5 Enlarged view of middle C;

[0019] Figure 7 It is a schematic diagram of the structure of the connection between the rotating shaft body and the spline sleeve assembly;

[0020] Figure 8 It is a structural schematic diagram of a spline jacket assembly;

[0021] 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;

[0022] 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.

[0023] 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

[0024] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0025] like Figure 1-4 As shown, the utility model is a combined 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.

[0026] like Figure 3-10As 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.

[0027] 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.

[0028] 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.

[0029] The above description is an explanation of the present invention, not a limitation of the present invention. Without violating the spirit of the present invention, the present invention may be modified in any form. For example, the inner teeth of the spline outer sleeve assembly 41 and the outer teeth of the spline inner sleeve assembly 42 may be of various tooth shapes, such as triangle, rectangle, arc, etc.

Claims

1. A combined rotating shaft for a biological turntable water treatment device, characterized in that: The shaft heads at both ends are detachably connected to the two ends of the hollow rotating shaft body (3) via a connecting device (4); the connecting device (4) comprises a spline inner sleeve component (42) and a spline outer sleeve component (41); the inner wall of the rotating shaft body (3) is welded with the spline outer sleeve component (41); the outer periphery of one end of the shaft head is welded with the spline inner sleeve component (42); the outer teeth of the spline inner sleeve component (42) mesh with the inner teeth of the central hole of the spline outer sleeve component (41); and a fixing ring (43) arranged on the outer side of the spline inner sleeve component (42) is fixed to the spline outer sleeve component (41) via a fastener.

2. The combined rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The spline housing assembly (41) comprises two identical spline housings (411) arranged at a certain distance from each other and a plurality of connecting rods (412) connecting the two spline housings.

3. The combined rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The spline inner sleeve assembly (42) comprises two spline inner sleeves (421) arranged corresponding to the spline outer sleeve (411).

4. The combined rotating shaft for the biological rotary disc water treatment device according to claim 1, characterized in that: The inner teeth of the spline outer sleeve component (41) and the outer teeth of the spline inner sleeve component (42) are triangular, rectangular or arcuate spline teeth.

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