JPS59186609A - Traveling scraping machine of sedimented sand - Google Patents

Abstract

PURPOSE:To scrape efficiently sedimented sand by providing an endless chain equipped with numerous buckets to turn around a frame, which expands and contracts freely in the vertical direction, and a scraping trestle provided to the lower end of the frame so that the scraping mechanism part may easily and freely be taken in and out. CONSTITUTION:Guide beams 8 and 8 having a couple of rails 7 and 7, which extends in the longitudinal direction of a sand sedimentation pond 1 are provided at the upper part of a traveling gantry 5, and a carriage 10 of a sedimented sand scraping machine is mounted between the guide beams 8 and 8 through wheels 9 and 9. A frame 11 which expands and contracts freely by a pantographic linking mechanism is hung from the lower side of the rear part of the carriage 10. The frame can be expanded and contracted vertically by an expansion and contraction operating member 12 such as a hydraulic cylinder of which one end is installed to the carriage 10. A chain 22 equipped with a bucket 21 scrapes the sedimented sand by the operation of a motor 18, and the tension of the chain 22 is kept by a tension control device 23 consisting of a weight 29 and a loose roller 27.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traveling type sand-sludge lifter for lifting sand from a sand-settling basin of a sewage treatment facility.

The settling basins in relatively large-scale sewage treatment facilities are usually equipped with multiple square-shaped settling basins, and a single sand pump is moved horizontally and vertically to lift and discharge the settled sand. I try to do it.

Conventionally, in this type of sand-settling method, a packet conveyor is swingably mounted on a traveling cart, and the work is carried out by raising and lowering the packet conveyor for each sand-settling basin.

By the way, recently, in order to increase the size of the settling basin and to strengthen the side walls of the settling basin, cross-beams have been installed in various places. As a result, it has become impossible to use the packet conveyor-type sand settling and scraping machines, and there has been a need to develop a new sand settling and scraping machine.

The present invention has been developed in view of the above-mentioned vehicle shape, and can be efficiently and easily used even in a sand settling basin whose upper surface is partitioned by reinforcing beams. The purpose is to provide a sand raking machine.

Embodiments of the present invention will be briefly described below with reference to the drawings.

In the figure, 1 is a sand settling basin formed into a rectangular shape in plan, and cross beams 2 are provided at required intervals on the upper surface of the basin.
, 2 to form an opening 3.3.

In Fig. 1, the front part of the settling basin 1 is omitted, but rails 4, 4 extending in the transverse direction are laid on the front and rear of the settling basin 1, and A traveling frame 5 formed in a portal shape is mounted via wheels 6, 6.

Guide girders 8, 8 having a pair of rails 7°7 extending in the longitudinal direction of the sand settling basin 1 are installed on the upper part of the traveling frame 5, and a car @9, 9 is installed between the guide girders 8, 8. A trolley 10 of a sand-slitter and scraper is mounted so as to be movable.

A telescopic frame 11 with a pantograph link mechanism is vertically installed on the rear lower side of the trolley 10, and a telescopic operation member 1 such as an oil field cylinder whose one end is attached to the trolley 10 is installed.
2, it can be expanded and contracted up and down. A scraping frame 13 is also provided at the lower end of the telescopic frame 1J.
are attached, and guide slots 14 and 15 are provided at least at the lower front end and the lower rear end, respectively, and auxiliary guide rollers 16 and the like are provided as necessary. Moreover, 1. A drive roller 18 is provided which is rotated by a motor 17, and a guide roller 19 is further provided in front of the drive roller 18, and a guide roller 2 is further provided in front of the intermediate portion of the telescoping frame 11.
0 is set.

The aforementioned drive, roller 18 and each guide roller 14°15
．． 16, 19, and 20 show an endless chain 22 in which a large number of buckets 21, 21, etc. (for scraping off sediment etc. from the bottom of the settling basin 1) are installed in series (only the buckets are shown in the figure, and the others are omitted).
is wrapped around the telescopic frame 11 and the scraping frame 1.
It patrols the outside of 3. And this endless chain 2
2 is interposed between the guide rollers L9 and L20 by a chain tension adjustment device 23 provided at the front lower side of the trolley 10, and allows the endless chain 22 to be fed out I7 in response to the expansion and contraction of the telescopic frame 11. , while pulling back and constantly applying an appropriate tension force to the chain 22.

That is, in the chain tension adjustment device 23, a plurality of sets of fixed rollers 25.25 are arranged in a row between the rear portions of support plates 24.24 vertically provided at intervals on both sides, and In front of them, it is possible to freely slide in the front-rear direction t, (;Iff
A moving body 26 is provided, and each of the fixed rollers 25 and 25 is attached to the movable body 26.
A plurality of sets of idler rollers 27, 27 are arranged in a row at different positions, and the chain 2 is arranged between the guide rollers 19, 20.
6 is wound alternately around each of the fixed rollers 25 and the floating rollers 27, and the floating body 26 has a chain attached to the front side of the floating body 26 so as to be freely raised and lowered from a lifting guide rod 28 suspended from the trolley 10. A telescoping weight 29 is attached via a lobe 30, and the weight of the chain telescoping weight 290 constantly draws the floating roller 27 forward via the floating body 26, thereby maintaining the tension of the endless chain 22. There is.

Next, to explain the operation of the above-mentioned sand and persimmon lifter of the present invention, during normal use for lifting sand, the telescopic operation member 2 is extended and the telescopic operation member 2 is extended as shown by the solid line L7 in the figure. 11 is extended downward, and the scraping frame 13 is lowered to the bottom of the sand settling basin 1. In this situation, 1. The path of the endless chain 22 from the drive roller 21 via the guide rollers 5.14 and 16.20° to the fixed rollers 25 of the chain tension adjustment device 23 is longer, and each idler roller 27,
27 moves close to each of the fixed rollers 25, 25, and the path of the endless chain 22 from the fixed roller 25 at the lower end to the floating roller 27 at the upper end is shortened. Then, when the motor 7 is activated, the endless chain 22 is transported in the direction of the arrow by the rotation of the driving roller 80, and a large number of packets 21 attached to the endless chain 22 are settled while passing from the guide roller 4 to the guide roller 5. It scrapes off sediment, etc. from the bottom of the pond, rises, changes direction when it passes the drive roller 8, drops the scraped sediment, etc. into a hopper 31 provided below, and is carried from a discharge gutter 32 to a conveyor 33. The conveyor 33 is not shown in FIG. 1.

Further, in the above-mentioned sand raking work, the cart 0 is moved back and forth within the range of the length of the opening 3 to scrape up the sand, etc. at the bottom of the opening 3.

Then, once the persimmon frying work at the bottom of the opening 30 is completed,
As shown by the chain line in FIG. 1, the telescoping operation member 12 is retracted to retract the telescoping flennel 1, the scraping frame 13 is pulled up above the sand settling basin 1, the cart 10 is moved, and the scraping frame is 13 onto the next opening 3, the telescopic operation member 12 is extended, and the above-described operation is repeated. In addition, when the scraping frame 13 is pulled up, the guide roller 15.1 is moved from the drive roller 18.
4.16.20 and the fixed roller 25 are shortened, so the path to the idle roller 27.
27 is Figure 1.

As shown by the chain line in Fig. 2, the chain telescopic weight 290
Pulled by the weight, the fixed rollers 25, 25 separate from each other,
The path from the fixed roller 25 at the lower end to the floating roller 27 at the upper end becomes longer.

The above-mentioned movement of the floating roller 27 is performed with the endless chain 22 always under tension due to the forward biasing of the floating body 26 by the chain telescoping weight 29.

In this way, when the scraping work in one settling basin 1 is completed, the traveling frame 5 is moved to the next settling basin 1 with the scraping frame 13 pulled up, and the above-mentioned operation is repeated. be.

In the above embodiment, the telescopic frame 11
Although a pantograph type link mechanism is used for the expansion/contraction means 17, it is not limited to this type, and other conventionally known types can also be adopted. In addition, the floating roller 26 in the chain tension adjustment device is moved in the front-back direction, but this mechanism has the fixed roller 25 and the floating roller 27 arranged in a row in the front-back direction, and the floating roller 27 is moved in the front-back direction. It can also be made to move in the vertical direction.

As explained above, the present invention has a frame in which an endless chain with a large number of packets attached thereto can be freely expanded and contracted in the vertical direction, and a scraping frame provided at the lower end of the frame is provided in a rotating manner. Even when working on a sand settling basin that is divided into several sections by means of an interposition, it is possible to easily and freely move the raking mechanism part in and out of the opening between each cross beam, and to perform the sand raking work efficiently. By installing a chain tension adjustment device, it has many excellent effects such as being able to maintain a moderate tx tension state without constantly loosening even when the telescopic freno expands and contracts, allowing smooth operation. It is something.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side iMi diagram showing an embodiment of the present invention;
FIG. 2 is a partially cutaway front view of the same. , 1...Sand basin 2...Horizontal beam 3.
...Opening 5...Traveling frame 8...
... Guide girder 1o ... Cart If ... Telescopic frame 12 ... Telescopic operation member 13 ... Scraping frame 14.1
5, 16, 19. 20 River guide roller 18... Drive roller 21... Packet 22... Endless chain 23... Chain tension adjustment device 25... Fixed roller 26... Idle body 27. ... Idle roller 28 ... Lifting guide rod 29 ... Chain telescopic weight Patent applicant Kubota Iron Works Co., Ltd.

Claims (1)

[Claims] A frame that can be expanded and contracted in the vertical direction is hung from a trolley installed on a traveling platform above the sand settling basin, and a sand scraping frame is attached to the lower end of the frame, and the frame and the frame are patrolled. An endless chain provided with a large number of packets is stretched, and a part of the endless chain is interposed in a chain tension adjustment device that lets out and pulls back the endless chain according to the expansion and contraction of the telescoping frame. Features: A traveling type sand scraper.