JP3606093B2 - Sediment transfer equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screen feeding device, particularly when a collected screen residue is pumped by a dust removing machine from a sewage treatment tank such as a sand basin in a sewage treatment facility, and is pumped to a next process by a pumping device. The present invention relates to a residue transporting facility capable of reliably collapsing a residue bridge generated in the intermediate hopper regardless of the property of the residue.
[0002]
[Prior art]
Normally, sewage and rainwater (hereinafter collectively referred to as sewage) are sent to a sand basin as a sewage treatment tank for sewage treatment facilities, where sand and sediment (wood pieces, paper pieces, vinyl pieces) , Sewage floating materials such as cloth pieces and dead leaves) are removed, and then, for example, discharged into a river or sent to the next processing step.
[0003]
Hereinafter, a conventional residue transport method will be described with reference to the drawings.
[0004]
2 is a partial schematic plan view showing a sand basin portion in a sewage treatment facility, FIG. 3 is a schematic front view showing a dust remover installed in the sand basin, and FIG. 4 is a partial schematic view showing a conventional residue transporting facility. FIG. 5 is a schematic sectional view showing a piston pump.
[0005]
2 to 5, reference numeral 1 denotes a sand basin for slowly flowing sewage and sinking and removing sand in the sewage in the course of this flow. The sand basin 1 is installed in parallel in a plurality of rows (5 rows in this example) in the basement. 1A is a sewage inflow port, and 1B is a sewage drain. Reference numeral 2 denotes a dust remover installed on the downstream side of each sand basin 1 for scraping the residue 3 in the sewage out of the sand basin 1. As shown in FIG. 3, the dust remover 2 is installed on the upstream side of the screen 4 provided across the width direction of the sand settling basin 1 and circulates endlessly by a motor 5 to remove sediment 3 in the sewage. 1 has a scraper 6 for scraping outside.
[0006]
7 is a conveyor for transporting the residue for collecting the residues 3 scraped by the dust remover 2 and transporting them to a pressure feeding device described later. The residue transporting conveyor 7 has a first conveyor 8 for collecting the residue 3 scraped by each dust remover 2 and a residue for conveying the residue collected by the first conveyor 8 to the pressure feeding device. It consists of a second conveyor 9. The 1st and 8th conveyors 8 and 9 consist of a chain conveyor, a belt conveyor, a flight conveyor, etc.
[0007]
Reference numeral 10 denotes a pumping device including a piston pump for pumping the residue 3 conveyed by the conveyor 7 to the residue retention hopper 11 on the ground.
[0008]
As shown in FIG. 5, the piston pump includes a plunger 12 that reciprocates by a hydraulic mechanism, a chamber 13 in which the loaded residue 3 is conveyed forward by the plunger 12, and a gate valve 14 that opens and closes the chamber 13. As the plunger 12 is reciprocated and the gate valve 14 is opened and closed, the residue 3 fed into the chamber 13 from the intermediate hopper 15 is intermittently passed through the conduit 16 to the residue retention hopper 11 on the ground. Transport it. The piston pump has an advantage that the transported object can be reliably transported regardless of the transport path.
[0009]
Reference numeral 17 denotes a screen presser provided in the intermediate hopper 15. The pusher 17 pushes the residue 3 in the intermediate hopper 15 and collapses the bridge of the residue 3 by moving the push rod 18 back and forth.
[0010]
According to the conventional residue transporting equipment configured as described above, the residue is transported to the residue storage hopper as follows.
[0011]
Sewage flows into the respective sand basins 1 from the inflow port 1 </ b> A and flows slowly through the sand basins 1. In the course of this flow, the sand 20 in the sewage settles and accumulates in the pit 1C at the bottom of the sand basin 1. The sand 20 deposited in the pit 1C is periodically lifted out of the sand basin 1 by a rake (not shown). When the sewage flows to the downstream side of the settling basin 1, the residue 3 in the sewage is scraped up by the scraper 6 of the dust remover 2. In this way, the sewage from which the sand 20 and the residue 3 have been removed is discharged from the drain 1B into, for example, a river or sent to the next processing step.
[0012]
On the other hand, the residue 3 scraped up by each dust remover 2 is conveyed to the pressure feeding device 10 by the first and second conveyors 8 and 9, and is pressure-fed to the residue storage hopper 11 by the pressure feeding device 10. The residue 3 in the residue storage hopper 11 is transferred to, for example, an incinerator and incinerated.
[0013]
[Problems to be solved by the invention]
However, the above-described conventional residue transport equipment has the following problems. That is, as shown in FIG. 5, when the residue 3 forms a bridge in the intermediate hopper 15 of the pressure feeding device 10, the residue 3 does not enter the chamber 13 even if the plunger 12 moves backward, and the pressure feeding device 10 is empty. It becomes a driving state. At this time, even if the pushing machine 17 is operated to move the pushing rod 18 forward and backward, depending on the properties of the residue 3 (for example, hard residue), the pushing rod 18 only reciprocates in the same place. The residue 3 could not be collapsed. Accordingly, even if the pusher 17 is operated, the residue 3 is not pumped to the residue storage hopper 11 at all.
[0014]
Accordingly, an object of the present invention is to provide an intermediate hopper of a pressure feeding device when the collected residue is pumped up by a dust removing machine from a sewage treatment tank such as a sand basin in a sewage treatment facility to the next process by a pressure feeding device. It is an object of the present invention to provide a residue transporting facility capable of reliably collapsing the residue residue generated in the interior of the residue regardless of the property of the residue.
[0015]
The invention according to claim 1 is a pumping device having an intermediate hopper into which the slag is thrown, for pumping the scum scraped from the sewage treatment tank in the sewage treatment facility to the next process, and in the intermediate hopper And a pusher for pushing in the residue, wherein the pusher is swingable around the upper end in the intermediate hopper, and the pusher is moved up and down. It is characterized in that the movement and the pushing operation are sequentially repeated .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the residue transporting equipment of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a partial schematic cross-sectional view showing the residue transport equipment of the present invention.
[0018]
In the present invention, the residue 3 scraped from the sewage treatment tank in the sewage treatment facility as shown in FIG. 2 is put into the intermediate hopper 15 of the pressure feeding device 10, and the residue 3 in the intermediate hopper 15 is moved to the pressure feeding device 10. In the next process, that is, in the sediment transporting equipment for transporting the residue to the residue storage hopper 11, the pushing device 17 in which the pushing rod 18 advances and retreats by the cylinder is made swingable about its upper end. As a result, the bridge 3 of the residue 3 generated in the intermediate hopper 15 is completely collapsed regardless of the properties of the residue 3. As shown in FIG. 1, for example, the swinging means of the pusher 18 includes a short stroke swinging cylinder 19.
[0019]
According to this invention, the residue 3 is pumped to the residue storage hopper 11 as follows.
[0020]
For example, when the residue 3 is not detected for a predetermined time by the residue detection means (not shown) provided on the outlet side of the pipe 6, the pusher 17 is operated. In this case, the operation order of the push rod 18, the plunger 12, and the cylinder 19 is as follows.
[0021]
The push rod 18 is lowered → The plunger 12 is advanced and the push rod 18 is raised → The plunger 12 is retracted → The swinging cylinder 19 is extended → The push rod 18 is lowered → The plunger 13 is advanced and the push rod 18 is moved forward → The plunger 12 is retracted → The swinging cylinder 19 is contracted → The push rod 18 is lowered again. The above operation is repeated.
[0022]
Thus, the push rod 18 does not simply reciprocate as in the prior art, but reciprocates while swinging around the upper end of the pusher 17, that is, every time it is pushed once. Therefore, the bridge of the residue 3 completely collapses regardless of the properties of the residue 3.
[0023]
If a water feeder (not shown) is installed on the intermediate hopper 15 and water is supplied into the intermediate hopper 15, the collapse of the bridge of the residue 3 is further promoted. In this case, if the operation of the pusher and the operation of the water feeder 15 are linked, the reliability of the bridge collapse and water saving can be achieved.
[0024]
【The invention's effect】
As described above, according to the present invention, the bridge of the residue generated in the intermediate hopper of the pressure feeding device can be removed by moving the push rod forward and backward while swinging the pusher provided in the intermediate hopper. The useful effect that it can be reliably broken down irrespective of the property of the is brought about.
[Brief description of the drawings]
FIG. 1 is a partial schematic cross-sectional view showing residue transport equipment of the present invention.
FIG. 2 is a partial schematic plan view showing a sand basin portion in a sewage treatment facility.
FIG. 3 is a schematic front view showing a dust remover installed in a sand basin.
FIG. 4 is a partial schematic front view showing a conventional residue transporting facility.
FIG. 5 is a schematic cross-sectional view showing a piston pump.
[Explanation of symbols]
1: Sand basin 1A: Inlet 1B: Outlet 1C: Pit 2: Dust remover 3: Screen residue 4: Screen 5: Motor 6: Scraper 7: Conveyor 8: First conveyor 9: Second conveyor 10: Pressure feeder 11 : Sediment storage hopper 12: Plunger 13: Chamber 14: Gate valve 15: Intermediate hopper 16: Pipe line 17: Pushing machine 18: Pushing rod 19: Cylinder 20: Sand content

Claims (1)

A pumping device having an intermediate hopper into which the scum is charged, and a pushing machine for pressing the scum in the intermediate hopper, for pumping the scum scraped from the sewage treatment tank in the sewage treatment facility to the next process In the residue transport equipment equipped with
The pushing-in machine can swing around the upper end in the intermediate hopper, and the pushing-in machine repeats its ascending, swinging, and pushing-in operations sequentially .

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