JP5727075B1 - Return flight side guide shoe and chain flight type sludge scraper equipped with the return route side guide shoe - Google Patents

Abstract

[PROBLEMS] To prevent a chain and a flight from dropping off due to a sloshing phenomenon by a return-side guide shoe having a simple structure and to be applied to an existing facility by retrofitting and a return-side guide shoe. To provide a chain flight type sludge scraping machine. The return-side guide shoe 12 slides with respect to the return-side guide rail 9 on the return-side guide shoe 12 that guides the flight 4 disposed on the chain flight type sludge scraper. At both ends in the width direction of the surface, there are protrusions 13a that are located facing each other with the head of the return-side guide rail 9 in between, and the space between the protrusions 13a is positioned above the sliding surface A guide plate 13 to be in a state is attached. [Selection] Figure 1

Description

  The present invention relates to an improvement of a chain flight type sludge scraping machine used in a sewage and wastewater treatment sedimentation basin, and more particularly to a return flight side guide shoe and a chain flight type sludge scraping machine equipped with the return side guide shoe. It is.

Conventionally, as a chain flight type sludge scraper installed in a settling pond, there are those shown in FIGS. 4 to 6 (see, for example, Patent Document 1).
In this chain flight type sludge scraper, the scum that floats on the water surface on the flight traveling on the return path side is raked up to the scum skimmer, the scum is swollen together with the surface water, and discharged outside the pond.

JP-A-8-267059

By the way, in the conventional chain flight type sludge scraper, there are many cases where the chain 2 and the flight 4 fall off due to the sloshing phenomenon in which the accumulated water in the settling pond fluctuates due to the earthquake, leading to a serious accident. It was sought after.
That is, as a measure against sloshing, it is necessary to suppress the swinging of the chain 2 and the flight 4 near the water surface between the drive shaft and the intermediate shaft and to prevent the return-side guide rail 9 from falling off. The sludge scraper could not suppress the rocking due to its structure.

  Although a method of providing a guide rail for preventing the flight 4 from rising above the return-side guide rail 9 has been proposed, in addition to the problem that the cost of countermeasures is high, the flight 4 is lifted later on the existing equipment. Providing a guide rail for prevention is often difficult due to structural limitations.

  In view of the problems of the conventional chain flight type sludge scraping machine, the present invention can prevent the chain and the flight from dropping off by a sloshing phenomenon by using a return-side guide shoe having a simple structure. It is an object of the present invention to provide a return flight guide shoe that can be retrofitted to the above equipment and a chain flight type sludge scraper equipped with the return flight guide shoe.

To achieve the above object, return-side guide shoe of the present invention, the return-side guide shoe for guiding along a flight which is disposed a chain flight sludge raking machine return-side guide rail, the return-side guide shoe , Having a protrusion only at one end in the width direction of the sliding surface with respect to the return-side guide rail, and at the both ends in the width direction of the sliding surface with respect to the return-side guide rail of the return-side guide shoe, There are projections that are located facing each other with the head of the return-path guide rail in between, and one of the projections overlaps with the projection of the return-path guide shoe and projects below it together, or between protrusion is to attach the guide plate in a state positioned above said sliding surface, is backward-side guide shoes, flat sliding against return-side guide rail A return-side guide shoe that is opposed to the return-side guide shoe in the widthwise direction of the sliding surface of the return-side guide shoe with respect to the return-side guide rail with the head of the return-side guide rail in between. A guide plate is provided which has projections to be in a state and is in a state where the projections are positioned above the sliding surface .

  In this case, the lower end portion of the projection of the guide plate may be formed in a shape that holds the head portion of the return path side guide rail.

  Moreover, the chain flight type sludge scraper of the present invention is characterized in that the return-side guide shoe is attached at a position corresponding to the return-side guide rail of the flight.

Even if the return flight side guide shoe of the present invention and the chain flight type sludge scraper equipped with the return route side guide shoe are lifted by the sloshing phenomenon and the return route guide shoe is separated from the return route guide rail, The projection of the guide plate attached to the return-side guide shoe is kept facing the head of the return-side guide rail with the head in the middle, and the return-side guide shoe does not cause a displacement due to the projection. It is possible to prevent the chain and the flight from dropping out by returning to the fixed position of the guide rail by the guide plate attached to the return-side guide shoe having a simple structure.
Further, since the guide plate is attached so that the distance between the projections is located above the sliding surface of the return path guide shoe, the guide plate does not slide directly on the return path guide rail and is not consumed.
This return-side guide shoe has no structural restrictions when it is attached to the position corresponding to the flight return-side guide rail, so it can be applied retrofit to existing equipment. The scraper can be easily modified to an earthquake-resistant chain flight sludge scraper.

  Further, the lower end portion of the protrusion of the guide plate is formed to hold the head of the return path guide rail, so that the engagement state of the protrusion with the head of the return path guide rail can be maintained. It is possible to prevent the return-side guide shoe from being completely detached from the head of the return-side guide rail.

It is explanatory drawing which shows one Example of the chain flight type sludge scraping machine of this invention. It is explanatory drawing of the principal part. It is explanatory drawing which shows the modification Example of the chain flight type sludge scraping machine of this invention. It is explanatory drawing of the conventional chain flight type sludge scraping machine. It is a top view of the chain flight type sludge scraping machine. It is a side view of the chain flight type sludge scraper.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a return flight side guide shoe and a chain flight type sludge scraper equipped with the return pass side guide shoe of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the return side guide shoe and the chain flight type sludge scraper of the present invention.
This chain flight type sludge scraping machine is installed in the sedimentation basin 1 like the chain flight type sludge scraping machine shown in FIGS. 4 to 6, and stretched along the longitudinal inner surface of the sedimentation basin 1. The two chains 2 are stretched endlessly between the sprocket wheels 31, 32, 33, 34 provided on the drive shaft and the support shaft (intermediate shaft) installed in the sedimentation basin 1, and many at regular intervals. The flight 4 is attached.

And this one sprocket wheel 31 is driven with the drive device 5, and a chain flight type sludge scraper is driven at a predetermined speed.
In addition, an outward guide rail 6 is disposed in the longitudinal direction of the bottom of the sedimentation basin 1, and an outward guide shoe 11 is attached at a position corresponding to the outward guide rail 6 of the flight 4. 11 is slid on the outward guide rail 6 and the flight 4 moves on the outward route so that the sludge settled on the pond bottom is scraped into the hopper 10 provided on the pond bottom end side.

  In the sedimentation pond 1, a scum skimmer 7 and an overflow trough 8 are provided on the surface of the terminal position of the flight 4 moving on the return path side, and the scum scraped by the flight 4 moving on the return path side It is discharged to the scum pit S, and the supernatant treated water is discharged from the overflow trough 8 to the outside of the pond.

  Then, the return side guide rail 9 that supports the flight 4 so that the flight 4 moving on the return side moves on a predetermined trajectory from the hopper 10 side, that is, the upstream side of the sedimentation basin 1 at the water surface position. At least along the moving length of the flight 4 on the return path via a mounting bracket 9B installed on the wall surface of the sedimentation basin 1 and at the position corresponding to the return path guide rail 9 of the flight 4 The shoe 12 is attached.

Furthermore, the scum skimmer 7 provided in front of the overflow trough 8 on the outflow side of the sedimentation basin employs a pipe skimmer linked to the operation of the chain flight type sludge scraper in this embodiment, but is not limited thereto.
Further, a scum pit S and a scum transfer pump P are provided on the side of the sedimentation basin 1.

This chain flight type sludge scraper rotates a drive shaft and a drive sprocket wheel from a drive device 5 via a transmission chain C, and a chain 2 and a flight 4 attached to the chain 2 are set in a sedimentation basin 1. Let it go around.
The flight 4 attached to the chain 2 is guided along the forward guide rail 6 on the forward path side, and the sludge that has settled on the bottom of the pond is raked up to the hopper 10 on the inflow side and is reversed and returned to the water surface. Then, the scum that is guided along the return-side guide rail 9 and floats on the water surface is raked up to the scum clearance 7.

  The scraped scum is swollen together with the surface water by the scum skimmer 7 that periodically operates, flows into the scum pit S, and is pumped and processed by a separate scum transfer pump P.

  By the way, in this chain flight type sludge scraping machine, in order to prevent the outward guide shoe 11 and the return guide shoe 12 from separating from the outward guide rail 6 and the return guide rail 9, the outward guide shoe 11 and the return path side guide shoe 12 are provided with protrusions 11a, 12a and 13a, respectively.

  Among these, the protrusion 11 a provided on the outward path guide shoe 11 has a height of the head of the outward path guide rail 6 at the outer end in the width direction of the sliding surface of the outward path guide shoe 11 with respect to the outward path guide rail 6. A relatively low height dimension h less than the dimension is set.

On the other hand, in the present embodiment, the return path side guide shoe 12 uses the same member as that of the forward path side guide shoe 11, and therefore includes the protrusion 12a having the relatively low height h (this protrusion). However, in order to prevent the chain 2 and the flight 4 from falling off due to the sloshing phenomenon, the return-side guide shoe 12 is connected to the return-side guide shoe 12. Sliding surface with respect to the side guide rail 9 (Here, the dimension in the width direction of the sliding surface is the width of the head of the return side guide rail 9 (for example, 38 mm when the return side guide rail 9 is a 12 kg rail). 2) to about 3 times the width of 2) in the width direction of 2). Has 13a, and, between the projections 13a are to attach the guide plate 13 in a state positioned above the sliding surface.
Here, the protrusion 13a is in a state in which the guide plate 13 is attached to the return-side guide shoe 12, and the return-side guide rail is positioned so as to face the head of the return-side guide rail 9 in the middle. 9 head height dimension L (for example, about 20 mm when the return path side guide rail 9 is a 12 kg rail) or more, specifically, 20 to 40 mm, preferably 25 to 35 mm. It is formed to have a degree.
The guide plate 13 is disposed on the front surface in the traveling direction of the return path guide shoe 12 and is attached to the flight 4 together with the return path guide shoe 12 via the bolt 12b.

Then, by attaching a guide plate 13 having a projection 13a that is located facing the head of the return-side guide rail 9 between the heads of the return-side guide rail 9 to the return-side guide shoe 12, the flight 4 is caused by the sloshing phenomenon. Even when the return side guide shoe 12 is detached from the return side guide rail 9, the protrusion 13 a of the guide plate 13 attached to the return side guide shoe 12 makes the head of the return side guide rail 9 intermediate. The state of being sandwiched and facing each other is maintained, and the return side guide shoe 12 returns to the home position of the return side guide rail 9 without causing a positional shift by the protrusion 13a, and it is easy for the chain 2 and the flight 4 to drop off. This can be prevented by the return path guide shoe 12 having a simple structure.
Further, since the guide plate 13 is attached so that the distance between the protrusions 13a is located above the sliding surface of the return path side guide shoe 12, the guide plate 13 is not directly slidably contacted with the return path side guide rail 9 and may be consumed. Absent.
Further, the return-side guide shoe 12 is not structurally limited when it is attached to the position corresponding to the return-side guide rail 9 of the flight 4, so that it can be applied to existing facilities as a retrofit. The flight-type sludge scraper can be easily modified to an earthquake-resistant chain-flight sludge scraper.

Here, as shown in the modified embodiment of FIG. 3, the lower end portion of the protrusion 13 a of the guide plate 13 is formed in a shape bent inward so as to hold the head of the return path side guide rail 9. Can be.
In this case, the gap dimension at the lower end of the opposing protrusion 13a is narrower than the width of the head of the return-side guide rail 9 (for example, about 38 mm when the return-side guide rail 9 is a 12 kg rail). The width of the abdomen of the guide rail 9 is preferably set wider than the width of the abdomen (for example, about 8 mm when the return path side guide rail 9 is a 12 kg rail).
Thereby, the engagement state of the protrusion 13a with respect to the head of the return path guide rail 9 can be maintained, and the return path guide shoe 12 can be prevented from being completely detached from the head of the return path guide rail 9. it can.
The other configurations and operational effects of this modified embodiment are the same as those of the embodiment shown in FIGS.

  The forward-side guide shoe 11 and the backward-side guide shoe 12 are made of any material having corrosion resistance and wear resistance such as cast iron, cast steel, stainless steel, and synthetic resin, and the guide plate 13 is made of stainless steel, synthetic resin, or the like. Each can be made of any material having corrosion resistance.

  In addition, it is preferable to attach a return-side guide shoe 12 with a guide plate 13 to all of the flights 4 and on both the left and right sides of the flight 4, A return-side guide shoe 12 not provided with the guide plate 13 may be attached.

  As mentioned above, although the chain flight type sludge scraping machine of the present invention has been described based on the embodiments thereof, the present invention is not limited to the configurations described in the above embodiments, and is appropriately within a range not departing from the spirit thereof. The configuration can be changed.

  The return flight side guide shoe of the present invention and the chain flight type sludge scraper equipped with the return pass side guide shoe can prevent the chain and the flight from dropping off due to the sloshing phenomenon by the return path guide shoe having a simple structure. Therefore, it can be used suitably for earthquake-fighting chain flight sludge scraping machines, and can be applied to existing facilities as a retrofitting chain flight sludge scraping machine. Can be modified.

DESCRIPTION OF SYMBOLS 1 Settling basin 2 Chain 31, 32, 33, 34 Sprocket wheel 4 Flight 5 Drive device 6 Outward guide rail 7 Scum skimmer 8 Overflow trough 9 Return side guide rail 10 Hopper 11 Outward side guide shoe 11a Protrusion 12 Return side guide shoe 12a Projection 12b Bolt 13 Guide plate 13a Projection

Claims (4)

In the return-side guide shoe that guides the flight arranged in the chain flight type sludge scraper along the return-side guide rail, the return-side guide shoe is only one end in the width direction of the sliding surface with respect to the return-side guide rail. A protrusion on the return side guide shoe, facing the both sides of the sliding surface of the return side guide shoe with respect to the return side guide rail in the width direction, with the head of the return side guide rail sandwiched in the middle A projection that is in a state of being in a state where one of the projections overlaps with the projection of the return-path guide shoe and projects below the projection, and the projections are positioned above the sliding surface. A return-side guide shoe characterized in that a guide plate is attached. In the return side guide shoe for guiding the flight arranged in the chain flight type sludge scraper along the return side guide rail, the return side guide shoe has a flat sliding surface with respect to the return side guide rail, The return-side guide shoe has protrusions that are located opposite to each other in the width direction of the sliding surface of the return-side guide shoe with respect to the return-side guide rail with the head of the return-side guide rail in between. And a return-side guide shoe characterized in that a guide plate is mounted so that the distance between the protrusions is higher than the sliding surface. The return side guide shoe according to claim 1 or 2, wherein a lower end portion of the protrusion of the guide plate is formed to hold the head of the return side guide rail. A chain flight type sludge scraping machine, wherein the return side guide shoe according to claim 1 , 2 or 3 is attached to a position corresponding to a return side guide rail of a flight.

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