JPS6313769Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is installed in a settling basin that settles and collects sand and solids contained in sewage, and removes the sediment accumulated in the sand pool at the bottom of the settling basin outside the basin. This invention relates to a bucket conveyor-type sand settling and scraping device for lifting.

This type of bucket conveyor-type sand raking device installed in a sand settling basin has V buckets attached to chain wheels attached to multiple shafts installed between opposing inner walls facing the sand pool at the bottom of the settling basin. A common method is to use an endless chain, and by passing a part of the chain outside the sand basin, the sand in the sand basin is successively scraped up using a V-bucket.

That is, in this device, the V-bucket passes through the sand pool at the bottom of the settling tank, scoops up the sand in the sand pool, and when the V-bucket is located outside the sand-settling tank, it is reversed and the sand in the V-bucket is scooped up. It comes from releasing.

In the case of equipment with the above structure, there will be no problem if the chain runs endlessly 24/7, but it is uneconomical to drive the chain when there is no sand in the sand pool, so a certain amount of sand will settle. Stop running the chain until then.

However, if sedimentation increases rapidly while the chain is stopped, the load becomes too large to start the chain even if an attempt is made to drive it, and the chain may become buried during this period. Once a chain is buried, it not only takes a lot of time and effort to restore it and restart it, but it also loses its function as a settling basin during this time, which has a serious impact on sewage treatment.

In order to solve the above problems, various devices have been proposed that move the part of the chain that is located in the sand puddle upward while the chain drive is stopped, thereby preventing the chain from becoming buried in the sand (for example, JP-B-42-18543, JP-A-48-94627,
Japanese Utility Model Publication No. 50-6996, Japanese Patent Application Laid-Open No. 52-9976, Japanese Patent Application Laid-Open No. 55-
47108).

According to each of the above proposals, even if it is possible to achieve the objective, they all have complex structures, are prone to failure, have a large number of parts, and are uneconomical, making them unsuitable for practical use. Ta.

From the above-mentioned point of view, this invention allows the chain part located in the sand pool to be moved upward with a simple structure while the sand settling and raking operation is stopped, and does not require power for the movement. The system provides an economical bucket conveyor type sand raking device that is easy to maintain and has no risk of failure. A tail chain wheel on a tail shaft supported at a fixed position near the bottom of the pond, and a fixed position lower than the drive shaft support position and above the sand settling basin, and oriented in a direction perpendicular to the axial direction of the drive shaft. a lower guide rail provided at an intermediate position lower than the upper guide rail and higher than the tail axis, and an upper guide roller that can freely roll along the upper guide rail at the upper end. In addition, a lower guide roller is provided in the middle portion that can freely roll along the lower guide rail, and a head shaft that can curve and move up and down near the bottom of the sand settling basin is provided at the lower end. A lifting arm, a head chain wheel supported by the head shaft, an endless chain with a bucket attached to each of the chain wheels and a predetermined intermediate chain wheel, and a wire attached to the lifting arm near the support portion of the lower guide roller. It is characterized in that it is equipped with a manual winding machine installed at a fixed position above the sand settling basin, with the ends connected to each other.

Next, the device of this invention will be explained with reference to the drawings.

FIG. 1 is a schematic vertical sectional view showing a first embodiment of the device of this invention, and FIG. 2 is a view taken along the line A--A in FIG. 1.

As shown in the drawing, the sand settling basin 1 is formed under a concrete floor slab 2, and a sand basin 3 having a predetermined length and depth is provided at the bottom.
An opening 4 is provided in a portion of the floor slab 2 facing above one end portion 3A of the sand pool 3.

The opening 4 is covered by a frame 5, and a drive shaft 6 and an intermediate shaft 7 are provided on the upper part of the frame 5.

The drive shaft 6 is connected to a motor (both not shown) via a reducer, and the drive shaft 6 includes:
A drive chain wheel 8 is fixed.

On the other hand, a tail shaft 9 is provided at the other end 3B of the sand pool 3.
is installed across the left and right side walls, and a chain wheel 10 is fixed to the tail shaft 9.

An upper guide rail 11 is provided in the frame 5 at a fixed position lower than the supporting position of the drive shaft 6 and above the settling basin, and the upper guide rail 11 is oriented in a horizontal direction orthogonal to the axial direction of the drive shaft. ing.

Lower than the upper guide rail 11, the tail shaft 9
At the bottom of the frame 5 as an intermediate position higher than
A lower guide rail 12 is provided that hangs down into the settling basin 1.

Lifting arm 1 includes an upper guide roller 13 that can freely roll along the upper guide rail 11 at the upper end, and a lower guide roller 14 that can freely roll along the lower guide rail 12 at the middle part.
5 has a head shaft 6 attached to its lower end. A head chain wheel 17 is supported on the head shaft 16.

An endless chain 22 to which a number of V-shaped buckets 21 are attached is stretched between the chain wheels 19 and 20 supported by the chain wheels and the intermediate shafts 7 and 18.

On the other hand, a manual hoisting winch 24 serving as a manual hoisting machine is provided on the frame 5 near the drive shaft 6, with the end of a wire 23 connected to the lifting arm 15 near the support portion of the lower guide roller 14. The manual hoisting winch 24 is provided with a band brake 25 as shown in FIG. 3, which locks the wire 23 after it has been hoisted.

Chain wheel 8, 10, 17, 19, 20
, upper guide rail 11, lower guide rail 1
2 and the elevating arm 15, etc., are respectively connected to the settling basin 1.
A pair of manual hoisting winches 24 are provided along opposite wall surfaces of the drums 24A, 24A for the two lifting arms 15, 15.
is fixed to one common shaft 24B.

In the device of this invention having the above-described structure, when the drive shaft 6 is rotated and the endless chain 22 is run in the direction of the arrow a, the V-shaped bucket 21 scrapes the sediment in the sand basin 3 and sequentially moves the sand basin 3 to the sand basin 3. Discharge the sediment to the outside.

When the sand raking work is stopped and the endless chain 22 is left stopped for a long time, the manual hoisting winch 24 is operated to hoist the wire 23 and the position of the head shaft 16 of the lifting arm 15 is raised. .

As a result, the position of the head chain wheel 17 becomes higher, so that the endless chain 22
The height increases from the inner tail chain wheel 10 side to the head chain wheel 17 side. Therefore, the endless chain 22 will not be buried in the sand.

The second embodiment shown in a longitudinal side view in FIG. 4 has an upper guide rail 11' and a lower guide rail 12'.
This is an example in which both are provided along the inner wall surface of the sand settling basin 1 and are inclined to shorten the length. In FIG. 4, the same members and portions as in the first embodiment are designated by the same reference numerals, and the explanations regarding these refer to the explanations in the first embodiment.

As is clear from the above description, the device of this invention allows most of the portion of the endless chain facing the sand pool to escape out of the sand pool extremely simply by operating the manual hoisting winch. This allows the endless chain to be reliably prevented from being buried in the sand pool.
Since the tension of the endless chain is always kept constant, there is no need for a take-up to adjust the slack.The main part of the lifting device of the endless chain is located on the floor slab, making maintenance management easy. It does not require any special power, is therefore economical, and has many excellent industrial effects, such as no risk of failure.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical sectional view showing an embodiment of the device of this invention, Fig. 2 is a view taken along line A-A in Fig. 1, and Fig. 3 is a lock of a manual hoist used in the device of this invention. FIG. 4 is a schematic side view showing an example of the mechanism, and FIG. 4 is a schematic longitudinal sectional view showing another embodiment of the device of this invention. In the drawing, 1...sand basin, 2...floor slab, 3
... Sand pool, 4 ... Opening, 5 ... Frame, 6 ... Drive shaft, 7 ... Intermediate shaft, 8 ... Drive chain wheel, 9 ... Tail shaft, 10 ... Tail chain wheel, 11 ... Upper guide rail, 12... Lower guide rail, 13... Upper guide roller, 1
4... Lower guide roller, 15... Lifting arm,
16... Head shaft, 17... Head chain wheel, 18... Intermediate shaft, 19, 20... Chain wheel, 21... V-shaped bucket, 22... Endless chain, 23... Wire, 24... Manual winding Lifting winch, 25... band brake.

Claims (1)

[Scope of utility model registration request] A drive chain wheel fixed to a drive shaft provided at a fixed position above the settling basin, a tail chain wheel fixed to a tail shaft provided at a fixed position near the bottom of the settling basin, and the drive shaft support position. an upper guide rail that is lower than the upper guide rail and is oriented in a direction perpendicular to the axial direction of the drive shaft at a fixed position above the settling basin; and an upper guide rail that is provided at an intermediate position that is lower than the upper guide rail and higher than the tail shaft. a lower guide rail with a lower guide rail, an upper guide roller that can freely roll along the upper guide rail at the upper end, and a lower guide roller that can freely roll along the lower guide rail at the middle part. an elevating arm having a lower end provided with a head shaft that can freely move up and down in a curved manner near the bottom of the settling basin; a head chain wheel supported by the head shaft; each of the chain wheels and a predetermined intermediate position. It is equipped with an endless chain with a bucket attached to a chain wheel, and a manual hoist installed at a fixed position above the settling basin, the wire end of which is connected to the lifting arm near the support part of the lower guide roller. A bucket conveyor type sand raking device.