JP2000237794A - Screen residue conveying equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely collapse the bridges of screen residues produced in an intermediate hopper of a forcibly feeding device irrespectively of property of the screen residues when the screen residues scraped up and collected by a dust collector from a sewage treating tank such as a grit catcher in a sewage treatment facility is forcibly fed to the next process by the forcibly feeding device. SOLUTION: In this screen residue conveying device provided with a forcibly feeding device 10 for forcibly feeding screen residues 3 scraped up from a sewage treating tank in a sewage treatment facility and having an intermediate hopper 15 into which the screen residues 3 are fed, and a pushing machine 17 for pushing the screen residues 3 in the intermediate hopper 15 thereinto, the pushing machine 17 can be swung in the intermediate hopper 15 around the upper end thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
In particular, when the sediment scraped up from a sewage treatment tank such as a sand basin in a sewage treatment facility by a dust remover and pumped to the next process by a pumping device, the residue generated in an intermediate hopper of the pumping device. The present invention relates to a sewage transfer facility capable of reliably disintegrating the bridge of sewage regardless of the properties of the sewage.

[0002]

2. Description of the Related Art Normally, sewage and rainwater (hereinafter collectively referred to as sewage) are sent to a sedimentation basin as a sewage treatment tank for sewage treatment equipment. , Sewage, paper pieces, vinyl pieces, cloth pieces, dead leaves, etc.) are removed, and then discharged to, for example, a river or sent to the next processing step.

[0003] A conventional residue transport method will be described below with reference to the drawings.

FIG. 2 is a partial schematic plan view showing a sand basin part in a sewage treatment facility, FIG. 3 is a schematic front view showing a dust remover installed in the sand basin, and FIG. FIG. 5 is a schematic sectional view showing a piston pump.

In FIG. 2 to FIG. 5, reference numeral 1 denotes a sand basin for slowly flowing sewage and settling 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 (five rows in this example) underground. 1A
Is a sewage inlet, and 1B is a sewage drain. Reference numeral 2 denotes a dust remover installed on the downstream side of each sand basin 1 to scoop up the sediment 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 a screen 4 provided across the width of the sand basin 1, and circulates endlessly by a motor 5 to remove the sediment 3 in the sewage basin. 1 has a scraper 6 for frying.

Reference numeral 7 denotes a residue transport conveyor for collecting the residue 3 scraped up by the dust remover 2 and transporting the collected residue 3 to a pressure feeding device described later. The residue transport conveyor 7 is a first conveyor 8 for collecting the residue 3 scraped up by each dust remover 2 and a conveyor for transporting the residue collected by the first conveyor 8 to the pressure feeding device. Second conveyor 9
It consists of The first and second conveyors 8 and 9 include a chain conveyor, a belt conveyor, a flight conveyor, and the like.

[0007] Reference numeral 10 denotes a pumping device comprising a piston pump for pumping the sewage 3 conveyed by the conveyor 7 to the sewage storage hopper 11 on the ground.

As shown in FIG. 5, the piston pump includes a plunger 12 which reciprocates by a hydraulic mechanism, a chamber 13 in which the deposited residue 3 is transported forward by the plunger 12, and a gate which opens and closes the chamber 13. The reciprocating motion of the plunger 12 and the opening / closing of the gate valve 14 allow the residue 3 sent from the intermediate hopper 15 into the chamber 13 to pass through the pipe 16.
, And is transported intermittently to the residue storage hopper 11 on the ground. The piston pump has an advantage that a conveyed object can be surely conveyed regardless of a conveying path.

Reference numeral 17 denotes a residue pushing machine provided in the intermediate hopper 15. The pushing machine 17 includes a pushing rod 18.
Advance and retreat, the residue 3 in the intermediate hopper 15
To break the bridge of the residue 3.

[0010] According to the conventional sewage transfer equipment configured as described above, the sewage is transferred to the sewage storage hopper as follows.

The sewage flows into each sand basin 1 from the inlet 1A and flows slowly through the sand basin 1. In the course of this flow, the sand 20 in the sewage sinks and accumulates in the pit 1C at the bottom of the sand basin 1. The sand 20 deposited on the pit 1C is periodically scraped out of the sand basin 1 by a scraper (not shown). When the sewage flows to the downstream side of the sand basin 1, the residue 3 in the sewage is scraped up by the scraper 6 of the dust remover 2. The sewage from which the sand 20 and the residue 3 have been removed in this way is discharged from the drain port 1B to, for example, a river or sent to the next processing step.

On the other hand, the residue 3 scraped up by each dust remover 2 is conveyed by a first and second conveyors 8 and 9 to a pressure feeding device 10 and then pressure fed to the residue storage hopper 11 by the pressure feeding device 10. Is done. The residue 3 in the residue storage hopper 11 is, for example, conveyed to an incinerator and incinerated.

[0013]

However, the above-mentioned 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 pumping device 10, the residue 3 remains in the chamber 13 even if the plunger 12 retreats.
Does not enter, and the pumping device 10 becomes idle. At this time, even if the pusher 17 is operated to move the push rod 18 forward or backward, the push rod 18 only reciprocates in the same place depending on the properties of the residue 3 (for example, hard residue). The residue 3 could not be disintegrated. Therefore,
Even if the pushing machine 17 is operated, the residue 3 is not fed to the residue storage hopper 11 at all.

[0014] Accordingly, an object of the present invention is to provide a pumping device for pumping the collected residue, which has been scooped up from a sewage treatment tank such as a sand basin in a sewage treatment facility by a dust remover, to the next process by a pumping device. It is an object of the present invention to provide a residue transporting equipment capable of reliably disintegrating the residue bridge generated in the intermediate hopper regardless of the properties of the residue.

[0015]

According to the first aspect of the present invention,
A pumping device having an intermediate hopper into which the sewage is fed, for pushing the sewage scraped from the sewage treatment tank in the sewage treatment tank to the next step, and a pushing machine for pushing the sewage in the intermediate hopper And the pushing machine is characterized in that it can swing around its upper end in the hopper.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the residue transporting equipment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial schematic cross-sectional view showing the residue transfer equipment of the present invention.

According to the present invention, the residue 3 scooped up from a sewage treatment tank in a sewage treatment plant as shown in FIG.
The sewage 3 in the hopper 5 is pushed into the next step, ie, the sewage storage hopper 11, by a pushing machine 17 attached to the pressure feeding device 10.
In the sewage transfer equipment which feeds the sewage up to the center, a pushing machine 17 in which a pushing rod 18 advances and retreats by a cylinder is swingable about its upper end, thereby bridging the sewage 3 generated in the intermediate hopper 15 to form a sewage 3. It is completely disintegrated irrespective of its properties. The oscillating means of the pusher 18 comprises, for example, a short stroke oscillating cylinder 19 as shown in FIG.

According to the present invention, the scum 3 is fed to the scum storage hopper 11 as follows.

For example, if the residue 3 is not detected for a predetermined time by the residue detecting means (not shown) provided on the outlet side of the pipe 6, the pushing machine 17 is operated. In this case, the order of operation of the pushing rod 18, the plunger 12, and the cylinder 19 is as follows.

The pushing rod 18 goes down → the plunger 12 moves forward and the pushing rod 18 goes up → the plunger 12 retreats → the swing cylinder 19 extends → the pushing rod 18 goes down → the plunger 13 moves forward and pushes in The rod 18 goes up → the plunger 12 retreats → the swing cylinder 19 shrinks → again
The push rod 18 is lowered. The above operation is repeatedly performed.

As described above, the pushing rod 18 does not simply repeat reciprocating movement as in the conventional case, but reciprocates while swinging around the upper end of the pushing machine 17, that is, once. Since the angle is changed each time it is pushed, the bridge of the residue 3 completely collapses regardless of the properties of the residue 3.

By disposing a water supply device (not shown) on the intermediate hopper 15 and supplying water 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 supply device 15 are linked, reliability of bridge collapse and water saving can be achieved.

[0024]

As described above, according to the present invention, while the pusher provided in the intermediate hopper is rocked,
By moving the push rod forward and backward, a useful effect is obtained such that the bridge of the residue generated in the intermediate hopper of the pumping device can be reliably disintegrated regardless of the properties of the residue.

[Brief description of the drawings]

FIG. 1 is a partial schematic cross-sectional view showing a residue transfer facility of the present invention.

FIG. 2 is a partial schematic plan view showing a sand basin part in the 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 transport facility.

FIG. 5 is a schematic sectional view showing a piston pump.

[Explanation of symbols]

 1: settling basin 1A: inlet 1B: outlet 1C: pit 2: dust remover 3: scum 4: screen 5: motor 6: scraper 7: conveyor 8: first conveyor 9: second conveyor 10: pumping device 11 : Scum residue storage hopper 12: plunger 13: chamber 14: gate valve 15: intermediate hopper 16: conduit 17: pushing machine 18: pushing rod 19: cylinder 20: sand

Continuing from the front page (72) Inventor Yukio Iwama 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Minoru Yamamoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Stock In-house F term (reference) 3F075 AA10 BA01 BB01 CA02 CA09 CC09 CC21 CD11 DA06 3F078 AA05 BA24 EA11 4D059 AA03 BB01 BK17 CB01 CB04 CB18

Claims (1)

[Claims] 1. A pressure feeding device having an intermediate hopper into which the residue is put for feeding the residue scraped from a sewage treatment tank in a sewage treatment plant to a next step, and a residue in the intermediate hopper. And a pushing machine for pushing in the residue. The pushing machine is characterized in that the pushing machine is swingable around its upper end in the intermediate hopper.