JPS6216168Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improved bearing structure of a settled sludge removal device in an initial/final or sedimentation tank.

First, a conventional chain flight type sludge scraping device will be explained with reference to FIG.

In FIG. 1, reference numeral 1 indicates the entire sedimentation tank, and as is well known, there are usually a number of sedimentation tanks 1 installed in rows and columns, and one of them is selected here and shown in cross section.

2 is the upstream side of the settling tank 1, and 3 is the downstream side, and in the illustration, wastewater flows in from the left and flows out to the right end.

4 indicates the upper surface of the flowing water, and 5 is an overflow weir for removing floating matter, thus forming the settling basin 1.
A chain flight type sludge scraping device 6 is configured inside.

The device 6 has a drive source 7 on the sedimentation tank 1, and is periodically forcedly driven by the drive source 7 via a transmission chain 8.

Its structure includes a drive wheel 9 located on the upstream side 2, an idler 10, a driven wheel 11 located on the bottom of the downstream side 3, and an intermediate wheel 12 located on the bottom of the upstream side 2. Two special chains 13 stretched across the chain are arranged in the width direction, and flights 14 for scraping are protruded in multiple rows from the outer periphery of each chain 13.

This flight 14 has an upper guide rail 15.
Middle guide rail 16 and lower guide rail 17
The sludge guided by the sludge and gradually deposited is collected and collected in the V-shaped sludge hopper 18 at the left end in the figure. The mud is removed by a scraper in a direction perpendicular to the drawing, or treated by a mud suction device 19 as shown.

The chain flight type sludge scraping device 6 is constructed in this way, but in this type of device, it is difficult to attach each shaft, and the work requires centering, which is very troublesome work. In addition, each chain must be tensioned with a suitable tension, and since there are a large number of chains, it is difficult and time-consuming to attach the chains. As a result, it takes a very long time to install or replace equipment, and after construction, each shaft, chain, sprocket, etc. is prone to corrosion due to sludge, which generally takes 3 to 6 years. The reality is that if a chain is used for a certain amount of time, it must be replaced, and the cost of replacing the chain is extremely high.

In view of this, the present applicant has provided the following screw-type removal device prior to filing this application.First, before explaining the features of this invention, the conventional device and its various problems will be introduced.

The ones shown in Figures 2 to 4 are conventional examples of the screw-type conveyor, where 1 indicates the entire initial settling tank, and as is well known, a large number of settling tanks 1 are installed in rows and columns. As mentioned above, I will choose one and explain it.

2 is the upstream side of the sedimentation tank 1, and 3 is the downstream side, where wastewater flows in from the left, flows to the right end, and flows out.

4 indicates the upper surface of the flowing water, and 5 is an overflow weir for removing floating matter.

Reference numeral 23 denotes a V-shaped inclined surface formed at an angle of approximately 45 degrees at the bottom of the settling tank 1, and in this case, it is integrally formed.

Reference numeral 24 denotes a concave loading groove formed at the top of the lower end of the V-shaped inclined surface 23. As shown in the third figure, this loading groove 24 is a semicircular groove that gradually slopes lower from the downstream side 3 toward the upstream side 2. Sludge hopper 18
It is a relationship that communicates within.

In this loading groove 24, a hydraulic drive type drive source 7 is installed on the most downstream side, and a small bearing 2 is installed on the most upstream side.
5, and an intermediate bearing 26 is provided therebetween.

A screw-type conveyor 27 is loaded through these, and the deposited sludge is thereby successively transferred to the sludge hopper 18.

The sludge accumulated in the sludge hopper 18 is carried out to the next treatment step by the sludge suction device 19 as described above.

As described above, the present applicant has provided the screw-type removal conveyor 27, but problems have arisen in implementing such a device.

In other words, in the conventional model shown in Fig. 2, the conveyor 27
The bearings 25 and 26 are mounted directly around the screw shaft as in ordinary equipment.

According to such a conveyor 27, since the bearing 26 is placed directly on the outer periphery of the screw shaft, an excessive force is applied to the bearing 26. Therefore, a drive sprocket is additionally provided to drive the shaft in the middle. I can't. Furthermore, in order for the bearing 26 to oppose the flow of sludge, a guide groove 29 is required as shown in FIG. 4.

The purpose of this invention is to solve these problems and provide the most advantageous shaft bearing structure for practical implementation.The main feature of this invention is that the bottom of the sedimentation tank is a V-shaped inclined surface. , in the center of its bottom edge,
A screw-type removal conveyor is arranged, and the screw-type conveyor is divided in the axial direction, and the divisions are connected by a joint whose angle can be changed freely. A rotary guide tube is fixed to the outer periphery of the conveyor near the above-mentioned connected point, with the other shaft portion exposed and a mud transport path left inside the tube, so that it can rotate together with the conveyor. , and a fixed bearing body fixed to the pond bottom is provided on the outer periphery of the rotary guide tube, and a mud transport passage is left inside near the rotary guide tube of the conveyor. A rotation guide cylinder is provided, and a drive sprocket is attached to the outer periphery of the rotation guide cylinder.

FIG. 5 and FIG. 6, which is a cross-sectional view thereof, show a preferred embodiment thereof.

The loading groove 24 shown here has a semicircular shape as described above and is gradually inclined in the removal direction, and a special screw-type conveyor 27 is installed inside the loading groove 24.

Although only a portion of the conveyor 27 is shown in the figure, it is very long, and for example, the length of the conveyor 27 is divided into 5 to 7 equal parts, and the parts are bent at joints 30 shown in the figure. They are freely connected.

In FIG. 5, the arrow direction is the removal direction, and to explain one conveyor 27 here, this conveyor 27 is connected to the screw shaft 31 and the screw 3.
2, and on the outer periphery near each end of the screw 32 (the position is free), there is a rotation guide cylinder 3 of an appropriate length.
3 is fixed by welding, and there is a mud transport passage 34 on the inner circumference.
It is devised so that the feed is straight by leaving .

A fixed bearing body 35 is provided on the outer periphery of the guide cylinder 33 via a bearing metal (not shown).
6 can be raised and lowered by the screw rod 38 along a pair of left and right lifting rods 37, 37, and when raised, it is taken out above the upper surface 4, which is advantageous for inspection and maintenance, while when lowered, the screw rod 38 It has the characteristic that it can be fixed freely with a restraint. However, the configuration that can be raised and lowered is not limited, and a fixed type may also be used.

Additionally, numeral 39 shown in FIG. 5 is a drive sprocket installed adjacent to such a bearing part, which is also chain-driven via another sprocket fixed around the rotation guide cylinder 33 and provided on the upper surface 4. In this case, it is advantageous that the driving means can be arranged anywhere along the length of the conveyor 27, and that the sludge can pass through the interior without stagnation.

In this way, the rotation guide cylinder 33 is fixed around the outer periphery of the conveyor 27, leaving the mud transport passage 34, and the fixed bearing body 35 is supported on the outer periphery of the rotary guide cylinder 33 in a corresponding manner.
Since the conveyor 27 does not come into direct contact with the fixed bearing body 35, wear and tear is not only minor, but also
Since it can be received with a sufficiently low surface pressure, it is also possible to bring the drive sprocket 39 to an intermediate position of the conveyor 27 and drive it. Therefore, the conveyor 27 is less likely to be twisted than when the drive section is arranged at the end of the conveyor 27, so a screw shaft with a small diameter can be used, and on the other hand, it is also possible to make the screw shaft longer. .

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional chain flight type example, Fig. 2 is a sectional view showing an example of the screw type proposed by the applicant, Fig. 3 is its cross sectional view, and Fig. 4 is its plan view. FIG. 5 is a sectional side view of a main part showing an example of this invention, and FIG. 6 is a sectional view taken along the line -1. 1...Sedimentation tank, 27...Screw type conveyor, 3
0...Joint, 32...Screw, 33...Rotation guide cylinder, 34...Mud transport passage, 35...Fixed bearing body.

Claims (1)

[Scope of utility model registration request] The bottom of the sedimentation basin is a V-shaped inclined surface, and a screw-type removal conveyor is arranged at the center of the lower end, and the screw-type conveyor is divided in the axial direction, and the division In between,
They are connected by a joint whose angle can be changed freely, and the rotation is guided by exposing the other shaft part on the outer periphery near the connected part of the conveyor and leaving a mud transport path inside the cylinder. The tube is fixed so that it can rotate together with the conveyor, and a fixed bearing body fixed at the bottom of the pond is provided on the outer periphery of the rotation guide tube, and a fixed bearing body is provided in a fixed position on the bottom of the pond, and a fixed bearing body is provided near the rotation guide tube of the conveyor. A shaft bearing for a sedimentary sludge removal device in a settling tank, characterized in that another rotary guide cylinder is provided so as to leave a sludge transport passage inside, and a drive sprocket is attached to the outer periphery of the cylinder. structure.