JPS6313770Y2 - - 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-mentioned problem, various devices have been proposed in the past in which the part of the chain located in the sand pool is moved upward while the chain drive is stopped, thereby preventing the occurrence of burying accidents. (For example, Special Publication No. 42-18543, Utility Model Publication No. 48-94627,
Actual Publication 1976-6996, Japanese Patent Publication 52-9976, Japanese Patent Publication 1977-55-
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 malfunction. and a tail chain wheel fixed to a tail shaft provided at a fixed position near the bottom of the settling basin, and a tail chain wheel fixed to a fixed position above the settling basin and swingably pivoted at a fixed position lower than the supporting position of the drive shaft. a swing arm having a head chain wheel movably supported at its upper end using a pipe member attached thereto as a guide and having a head chain wheel at its lower end that allows free access to the bottom of the sand settling basin;
and a manual winding machine having a pinion that is supported by a trunnion at a fixed position above the sand settling basin and meshes with the rack arm, the tip of which is connected to the middle of the swing arm; a guide rail fixed at a fixed position for guiding a guide roller;
The present invention is characterized in that it comprises each of the chain wheels and an endless chain with a bucket attached to a predetermined intermediate wheel.

Next, the device of this invention will be explained based on the 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 shows an example of a manual hoist. It is a schematic perspective view.

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.

There is a
A pair of tube members 11 are pivotally connected at their upper ends to a shaft 11A.

On the other hand, pipe members 1
A pair of guide rails 12 are provided at a portion closer to the upper end portion 3A of the sand pool 3 than the guide rails 12.

Furthermore, a bearing 13 provided on the frame lower frame 5A directly above the guide rail 12 and lower than the support position of the drive shaft 6 is equipped with a pinion that meshes with a rack arm 19.
is supported by a trunnion.

The upper ends of swing arms 15 are fitted into the tube members 11, respectively. The tube member 11 guides the upper end of the swing arm 15, and the guide rail 12 guides a guide roller 16 attached to the middle part of the swing arm 15.

The swing arm 15 has a length such that its lower end can freely approach the bottom surface of the sand pool 3, and a head chain wheel 18 is attached to a head shaft 17 provided at the lower end.

Furthermore, the tip of the rack arm 19 of the manual hoist 14 is connected by a pin 20 slightly above the mounting position of the guide roller 16.

Each chain wheel and the intermediate chain wheel 21 attached to the intermediate shaft 7 as a take-up shaft, and the intermediate chain wheel 23 attached to the intermediate shaft 22 installed in the sand settling basin 1,
A pair of endless chains 24 are spanned along both side walls within the settling basin 1.

A large number of V-shaped buckets 25 are attached between the pair of endless chains 24 across the width of the sand settling basin 1, and are moved by the endless chains 24 in the direction of arrow a.

As shown in FIG. 2, a pair of swing arms 1
5 are connected to each other by a horizontal connecting shaft 26.

The manual hoist 14 has a pinion 27 meshing with the rack arm 19, as shown in a schematic perspective view in FIG.
An intermediate large gear 29 is fixed to the shaft 28 of the intermediate gear 29, and a worm wheel 32 and a ratchet wheel 33 as a safety means are fixed to the shaft 31 of an intermediate small gear 30 that meshes with the intermediate large gear 29.

A worm 35 with a handle 34 is engaged with the worm wheel 32, and a ratchet 36 is detachably engaged with the ratchet wheel 32.

By operating the handle 34, the worm 35, worm wheel 33, intermediate small gear 30,
The rack arm 19 is guided by a guide roller 37 through the intermediate large gear 29 and pinion 27, and moves up and down in a straight line.

In FIG. 1, reference numeral 38 denotes a fixing device for fixing the rack arm 19 when the manual hoist 14 is operated and the rack arm 19 is retracted during a pause in the sand-scattering work.

As shown in detail in a perspective view in FIG. 4, the fixture 38 has a stopper 39 fixed in the middle of the rack arm 19, and a hook 40 at the bottom that is fitted into the rack arm 19 and abuts the lower surface of the stopper 39. It consists of a lever 41 provided.

For example, the lever 41 has its middle portion attached to a horizontal shaft 43 on a bracket 42 attached to the frame lower frame 5A.
It is supported by a shaft. A lock pin 44 is attached to the upper part of the lever 41, and the lock pin 44 is fitted into a guide hole 46 in a side plate 45 provided on one side of the bracket 42.

Therefore, after retracting the rack arm 19 by operating the manual hoist 14, as shown in FIG.
Operate the lever 41 to fit the hook 40 into the rack arm 19 on the bottom of the stopper, and then press the lock pin 44.
By tightening, the rack arm 19 is fixed in that position. To release the fixation of the rack arm 19, loosen the lock pin 44 and then
1 to remove the hook 40 from the rack arm 19.

In the device of this invention having the above-mentioned configuration, when the manual hoist 14 is operated to project its rack arm 19, the swing arm 15 is displaced while being guided by the guide rail 12, and is attached to the lower end of the swing arm 15. The head chain wheel 18 is lowered. As a result, as shown by the solid line in Figure 1,
A portion of the endless chain 24 between the tail chain wheel 10 and the head chain wheel 18 is approximately parallel to the sand pool 3.

When the endless chain 24 is run in this state,
The bucket 25 scrapes off the sediment in the sand basin 3 and sequentially discharges the sediment to the outside of the sand basin 3.

When the sand raking operation is stopped and the endless chain 24 is left stopped for a long time, the manual hoist 14 can be operated to retract its rack arm 19. As a result, the position of the head chain wheel 18 attached to the lower end of the swing arm 15 becomes higher, so that the endless chain 24 becomes higher as it goes from the tail chain wheel 10 side in the sand pool 3 to the head chain wheel 18 side. tilt so that Therefore, the endless chain 24 will not be buried in the sand.

As is clear from the above explanation, the device of this invention can be used only by operating the handle of the manual hoist.
Most of the part of the endless chain facing the sand pool can be extremely easily escaped from the sand pool, ensuring that the endless chain is not buried in the sand pool, and the tension of the endless chain is always kept constant. This eliminates the need for take-up for slack adjustment, and since the main part of the endless chain lifting device is on the floor slab, maintenance management is easy, and no special power is required to lift and lower the endless chain. Therefore, many excellent industrial effects are brought about, such as being economical and having no risk of failure.

[Brief explanation of the drawing]

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 an example of a manual hoist used in the device of this invention. FIG. 4 is a schematic perspective view showing an example of a fixing device for fixing a rack of a manual hoist. 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 ... Pipe member, 12... Guide rail, 13... Bearing, 14... Manual hoist, 15...
...Swing arm, 16...Guide roller, 17
...Head shaft, 18...Head chain wheel, 19...Rack arm, 20...Pin, 2
1, 23... Intermediate chain wheel, 22... Intermediate shaft, 24... Endless chain, 25... V-shaped bucket, 26... Connection shaft, 27... Pinion, 28
... shaft, 29 ... intermediate large gear, 30 ... intermediate small gear, 31 ... shaft, 32 ... worm wheel, 3
3... Ratchet wheel, 34... Handle,
35...warm, 36...ratchet, 37...
... Guide roller, 38 ... Fixture, 39 ... Stopper, 40 ... Hook, 41 ... Lever, 42 ...
... Bracket, 43 ... Shaft, 44 ... Lock pin, 45 ... Side plate, 46 ... Guide hole.

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 support for the drive shaft. a head chain wheel that is movably supported at its upper end using a pipe member that is swingably pivoted at a predetermined position above the sand settling basin as a guide, and whose lower end can freely approach the bottom of the sand settling basin; a swing arm having a swing arm lower than the support position of the drive shaft;
and a manual winding machine having a pinion that is supported by a trunnion at a fixed position above the sand settling basin and meshes with the rack arm, the tip of which is connected to the middle of the swing arm; a guide rail fixed at a fixed position for guiding a guide roller;
A bucket conveyor type sand raking device comprising each of the chain wheels and an endless chain with a bucket attached to a predetermined intermediate wheel.