JPS5928647Y2 - Silt prevention type sand scraper - Google Patents

Description

[Detailed description of the invention] This invention relates to a sand scraper installed in a sand settling pond, etc., and is designed to be installed on the inflow side at all times to prevent the scraper from being buried by inflowing sand due to a temporary increase in the amount of inflowing sand or when the operation is stopped. The raking machine is raised and placed on standby, and lowered during operation to carry out the desired sedimentation and raking.

That is, in the present invention, a packet conveyor arranged to scrape up sediment along a sand settling basin is supported by a beam that can be raised and lowered by a scraping device in which a guide sprocket wheel on the inlet side and a submerged sprocket wheel are installed on oil. The gist of this invention is an anti-siltation type sand-scratcher that allows the packet conveyor to be raised and lowered without changing the overall length of the packet conveyor.The present invention will be explained below based on an embodiment shown in the drawings. .

In the figure, 1 is a settling basin, and 2 is a packet conveyor for sand removal, which is installed along the inside of this settling basin.This packet conveyor 2 is installed at the upper part of the inner wall of the settling basin, and in the longitudinal direction of the settling basin. A plurality of sprocket wheels 3a, 3b, 3
c, a submersible sprocket wheel 4a provided on the inner wall of the pond bottom on the outflow side of the settling basin, an underwater sprocket wheel 4b provided on the inflow side of the settling basin, and a plurality of sprockets provided in the settling device provided above the settling oil. Wheels 5a, 5
b.

5c... By driving one or more wheels 5b in the scraping device with the drive device 9, the packet conveyor is driven and the sand is scraped up.

A submersible sprocket wheel 4b located in the water on the inflow side of this settling basin and one sprocket wheel 5a located in the scraping device are respectively supported by the lower end and upper end of the beam 6, and this beam 6 is connected to the sand settling device I. It is supported so that it can slide vertically (elevate and descend) vertically or slightly inclined.

As long as the beam 6 is supported so that it moves up and down smoothly, other structures than the support method using the guide rollers 8 as shown in the figure may be used.

The beam is lifted or lowered by engaging a rack L provided along the beam with a drive pinion P provided in the scraping device, and by driving the pinion forward or reverse, the beam is raised or lowered while being supported by guide rollers. However, it is also possible to raise and lower it using a lifting device other than a rack and pinion.

In the figure, numeral 10 is a hopper for discharging sand, 11 is an unloading machine,
12 is a packet cleaning nozzle, and 13 is a transmission chain that transmits power between the drive device 9 and the sprocket wheel 5b.

Therefore, the sand scraper constructed as described above usually has a beam 6.
The robot is stopped at the elevated position and is kept on standby.

Therefore, the packet conveyor will not be buried even by inflowing earth and sand.

When the amount of sediment exceeds a certain value and this is detected over time or by other methods, or when the packet conveyor is to be driven, the packet conveyor 2 is driven by the drive device 9 when the start switch is turned on. At the same time, the beam 6 is lowered by its driving device.

While this packet conveyor is being driven, the beam descends and the packets are successively scraped up from the top of the sediment and discharged.

Then, the beam 6 reaches the preset lowest position,
In addition, it is assumed that the sand raking has been completed after a certain period of time has elapsed.
The beam is raised one by one while the packet conveyor is operated, and when it reaches the highest position, the packet conveyor is stopped and kept on standby.

When the load applied to the packet conveyor as the beam descends during this sand raking operation reaches a predetermined normal operating load or higher, the beam partially stops descending and only the packet conveyor operates to settle the sand. Raking is performed, and when the load on the packet conveyor reaches a set value, the beam is lowered again.

In this way, operation can be performed automatically.

Various methods can be considered to detect the overload on the packet conveyor, but it is also possible to detect this beam tilting pressure with a load cell S by utilizing the force acting on the beam to cause it to tilt due to the load of the packet conveyor. It is possible.

Even when the beam is raised and lowered, the total length of the packet conveyor hardly changes, so there is no need for take-up. However, if the settling basin is short as shown in Figure 5, and the beam is raised and lowered by stroke S1, the length of the lowered position will change. Sprocket wheel 5
The length between a and 5 b (7) is L4 rather than L3.

At this time, since L3<L4, the length of the cheno (packet conveyor) may vary, so a take-up device 14 is provided in a portion to absorb this.

In addition, the present invention's sand settling and scraping device can be operated both automatically and manually.

According to the present invention, the inlet side of the sand settling basin of the sprocket wheels meshing with the packet conveyor is supported by a beam that moves up and down, and the beam is moved up and down independently of the operation of the packet conveyor, and the beam is placed on standby in the raised position. Therefore, it will not be buried even if a large amount of sediment flows in at one time, and since the submersible sprocket wheel and guide sprocket wheel are supported on the beam, the difference in length of the cheno will be naturally absorbed even when the beam is raised and lowered, and it can be moved by take-up. Furthermore, since the beam is raised and lowered by a floating drive device, maintenance and inspection are easy.Also, since the beam is lowered while operating the packet conveyor, sand can be raked up smoothly even when the amount of sediment is large. has advantages.

[Brief explanation of drawings]

Fig. 1 is a schematic front view, Fig. 2 is an enlarged front view of the sand settling and scraping device, Fig. 3 is a plan view, Fig. 4 is a side view, and Fig. 5 is a diagram of a different embodiment. 1...Sand basin, 2...Bactuant conveyor) 3a. 3b, 3cm... Sprocket wheel, 4a
・・・・・Underwater sprocket wheel on the outflow side 1, 4
b... Submersible sprocket wheel on the inflow side, 5
a, 5b. 5c...Sprocket wheel, 6...
・Beam, I...Sand scraping device, 8...
・Guide roller, 9... Drive device, 10...
... Hopper, 11... Unloader, 12...
...Washing nozzle, 13...Transmission check7.
14... Take-up device, L... Rank, P... Pinion, S... Load cell.

Claims (1)

[Scope of utility model registration request] A packet conveyor is arranged to scrape up sediment along a sand settling basin, and a guide sprocket wheel on the inflow side and a submersible sprocket wheel are supported on a beam that can be raised and lowered to a scraping device installed on oil. This anti-siltation type sand scraper allows the packet conveyor to be raised and lowered without changing the overall length of the conveyor.