JP6042280B2 - Chain type sludge scraper - Google Patents

Description

  The present invention relates to a chain-type sludge scraper used in a sedimentation basin installed in a water treatment facility such as a sewage treatment facility or a water treatment facility.

  Conventionally, in a sludge scraper used in a sedimentation basin installed in a water treatment facility, a chain made of SUS has been widely used as a chain for circulating a flight, but in particular, in a sewage treatment facility, corrosion and wear. Synthetic resin chains have come to be used because of measures and light weight and easy installation work. In recent years, synthetic resin chains have also been devised to reduce their wear and extend their life. The notch chain C as shown in FIG. 2 has come to be used.

  On the other hand, due to the sloshing phenomenon in which stagnant water in the sedimentation basin oscillates due to an earthquake, many cases have been reported in which a chain with a flight dropped off leading to a serious accident, and this countermeasure is required.

  By the way, as a mechanism for preventing the chain to which the flight is attached, the chain tooth skip prevention device 5 (see Patent Document 1) that also serves as the chain disengagement prevention device shown in FIG. 3 or the automatic tension device shown in FIG. 7 (see Patent Document 2) has been proposed.

  However, for example, a synthetic resin chain, in particular, the notch chain C as shown in FIG. 2 is light in weight and loosely fitted with a wheel, and thus has a problem of being easily affected by the sloshing phenomenon. Further measures were required.

Japanese Patent No. 4435244 JP 2013-52332 A

  In view of the problems of the conventional chain type sludge scraper, the present invention is a chain type sludge capable of preventing a chain attached with a flight from dropping off due to the sloshing phenomenon in which the accumulated water in the settling basin swings. The purpose is to provide a scraping machine.

In order to achieve the above object, the chain type sludge scraper of the present invention circulates and drives an endless chain with a drive device , and a chain detachment prevention device is provided on the drive shaft and intermediate shaft of the water surface of the chain. In the chain-type sludge scraper provided , the intermediate shaft chain disengagement prevention device is rotatably supported by an intermediate shaft that is cantilevered on the wall surface of the settling basin, and the intermediate shaft sandwiched between the wheels. A collar that is inserted into both sides and fixed detachably using screws, a side plate that is provided on the collar along the side of the wheel, and an upper end of the side plate, above the wheel, and It is characterized by comprising a projecting piece provided so as to be opposed to each other by forming a gap through which a connecting piece for connecting a flight to the chain can pass .

In this case, an automatic chain tensioning device can be provided on the ground.

  According to the chain-type sludge scraping machine of the present invention, in the chain-type sludge scraping machine that circulates and drives the endless chain with the driving device, the chain is separated from the drive shaft and the intermediate shaft of the water surface of the chain. By providing a prevention device, for example, even in the case of a lightweight synthetic resin chain such as a notch chain, the chain to which the flight is attached is reliably prevented from falling off due to the sloshing phenomenon in which the accumulated water in the sedimentation basin swings. be able to.

Then, the intermediate shaft chain detachment prevention device, a wheel which is rotatably supported on the intermediate shaft attached to the wall of the sedimentation tank in a cantilever, and inserted into both sides of the intermediate shaft across the wheel, using a screw a collar is detachably fixed respectively Te, side plates respectively provided along the side of the wheel to the collar, the upper portion of the side plate, above the wheel, and connection pieces for connecting the flight chain By constructing with the projecting pieces provided so as to face each other by forming a gap that can pass, it is possible to reliably prevent the chain with the flight attached from the intermediate shaft from falling off, On the other hand, it is possible to attach and detach the chain disengagement prevention device, and the chain type sludge scraping machine can be easily maintained.

  In addition, by installing an automatic chain tensioning device on the ground, the chain is always tensioned with appropriate tension, so that the chain can be prevented from swinging due to the sloshing phenomenon near the water surface between the drive shaft and the intermediate shaft. Can be prevented. Moreover, since the automatic tensioning device is provided on the ground, it is not necessary to drain the settling basin in order to perform the tensioning operation, and the operation can be easily performed.

It is explanatory drawing which shows one Example of the chain type sludge scraping machine of this invention. It is explanatory drawing of the notch chain of the chain type sludge scraping machine. The chain tooth | gear skipping prevention apparatus of the drive shaft of the chain type sludge scraping machine is shown, (a) is a whole explanatory drawing, (b) is explanatory drawing of the principal part. The chain disengagement prevention device of the intermediate shaft of the chain type sludge scraper is shown, (a) is a front view showing a state where the chain disengagement prevention device is attached to the intermediate shaft, and (b) is a side view of the chain disengagement prevention device. is there. It is explanatory drawing of the automatic tension apparatus of the chain type sludge scraping machine.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a chain type sludge scraping machine of the present invention will be described based on the drawings.

  In FIG. 1, one Example of the chain type sludge scraping machine of this invention is shown.

  In order to remove sludge such as sand and organic matter contained in the raw water introduced into the rectangular sedimentation basin P installed in water treatment facilities such as sewage treatment facilities and water treatment facilities, a chain type is installed in the sedimentation basin P. Sludge scraper D is installed.

  The one shown in FIG. 1 employs a notch chain type sludge scraper as the chain sludge scraper D, and includes a drive shaft 1 and an intermediate shaft disposed at predetermined positions in a rectangular sedimentation basin P. 2. Two endless notch chains C are stretched between the wheels S1, S2, S3, S4 supported by the tail shaft 3 and the head shaft 4 so as to be parallel to each other, and provided on the ground. Further, the endless notch chain C is circulated and driven by the driving device M, and the flights F are attached at predetermined intervals so as to be spanned between two adjacent notch chains C in parallel.

  And the flight F attached to the notch chain C at a predetermined interval circulates and drives the notch chain C to move sludge that has settled on the pond bottom when moving in the direction of the arrow F1 along the pond bottom. The scum is scraped to the sludge pit P1 side and moved to the arrow F2 direction at the water surface position, and the scum floating on the water surface is squeezed to the scum skimmer S side and discharged.

In the notch chain C, as shown in FIG. 2, an I part C1 is formed on one end side of a synthetic resin link, a clevis part C2 is formed on the other end side, and an I part C1 of one adjacent link is formed. The clevis portion C2 formed on the other side link is inserted, and a pin (not shown) is inserted into the insertion portion so that each link is continuous to form a notch chain C having a required length. .
This notch chain C made of synthetic resin has an advantage that it is resistant to corrosion and wear, is lightweight and easy to install.
The link of the notch chain C is provided with a recess-shaped notch N, and the notch N is engaged with the pin S1a of the wheel S1 of the drive shaft 1, as shown in FIG. An endless notch chain C is circulated.
Further, as shown in FIG. 4A, a connection piece Fa for attaching the flight F to the notch chain C in a substantially vertical direction is directly attached to the notch chain C with a bolt Fb.
It should be noted that other types of synthetic resin chains and SUS chains can be used, and this is not excluded.

  The wheel S1 supported on the drive shaft 1 is provided with a chain disengagement prevention device for preventing the meshing between the notch N of the chain C and the pin S1a of the wheel S1 of the drive shaft 1 due to the sloshing phenomenon shown in FIG. A chain tooth skip prevention device 5 is also provided (see Patent Document 1).

  Here, the wheel S1 supported on the drive shaft 1 is configured by connecting two disks S1b in parallel with each other by a large number of pins S1a. The drive shaft 1 is connected to a settling basin P via a pair of bearings 11. Is supported in a double-sided manner on the wall surface Pw.

  The chain tooth skip prevention device 5 includes a guide plate 51 that holds down the notch chain C, and a guide support bifurcated bracket 52 that is a support member of the guide plate 51.

  The guide plate 51 applies a pressing force that prevents the notch chain C to lift when the notch chain C is about to fall off the wheel S1 due to the sloshing phenomenon in which the accumulated water in the settling basin P swings. Yes.

  Then, in order to support the pressing force that prevents the notch chain C from being lifted by the drive shaft 1, the bearing means 53 that penetrates the drive shaft 1 and the support of the guide plate 51 that is rotatable around the drive shaft 1 are supported. A beam member 54 that prevents rotation of the guide support bifurcated bracket 52 that is a member is provided.

Specifically, a sliding bearing as a bearing means 53 is provided in a guide support bifurcated bracket 52 which is a support member, and the drive shaft 1 is inserted therein.
Further, in order to support the force by which the guide plate 51 is rotated in the rotation direction of the wheel S1, an anti-rotation material as the beam member 54 is provided. This anti-rotation material is fixedly attached so as to be transverse to the sedimentation basin P.

  The guide plate 51 is composed of a plate member having a pair of L-shaped cross-sections disposed on both sides of the wheel S1, extends the front end flange portion of the plate member to the outer peripheral surface of the notch chain C, and is described later in the middle. Similar to the chain disengagement prevention device 6 of the shaft 2, a gap G1 through which the connecting piece Fa for connecting the flight F to the notch chain C by the bolt Fb can be provided at the center so as to have a tooth skip prevention function.

  The wheel S2 supported by the intermediate shaft 2 is provided with a chain detachment prevention device 6 shown in FIG. 4 that prevents the chain C from coming off from the notch N of the chain C and the wheel S2 of the intermediate shaft 2 due to the sloshing phenomenon. .

  The chain disengagement prevention device 6 for the intermediate shaft 2 is intermediate between the wall Sw of the settling basin P and the intermediate shaft 2 mounted in a cantilever manner via a bearing stand 21 with a wheel S2 supported rotatably. The collar 61 fixed to the shaft 2, the side plate 62 provided on the collar 61 along the side surface of the wheel S 2, the upper end of the side plate 62, the wheel F above the wheel S 2, and the flight F to the notch chain C Are formed by projecting pieces 63 provided so as to be opposed to each other by forming a gap G2 through which the connecting piece Fa connecting the bolt Fb can pass.

Here, the collar 61 is detachably fixed to the intermediate shaft 2 using a screw 64.
Accordingly, the chain disengagement prevention device 6 can be attached to and detached from the intermediate shaft 2, and the maintenance of the chain sludge scraper D can be easily performed.

  Moreover, although the protrusion 63 uses the rod-shaped member (round steel) with a circular cross section, a rod-shaped member and plate-shaped member with a rectangular cross section can also be applied.

  The wheel S3 supported by the tail shaft 3 is configured to be movable in the horizontal direction, so that a constant tensile force is applied to the two notch chains C stretched on the wheel S3.

A constant tension is always applied to the notch chain C by the movement t of the wheel S3 regardless of the elongation of the notch chain C.
Here, the movement t of the wheel S3 is, for example, a bending mechanism in which the bearing of the tail shaft 3 is slidably supported on a slide mechanism such as a guide rail disposed in the horizontal direction and fastened to both ends of the tail shaft 3 respectively. A connecting body 71 such as a simple wire rope is fastened to an automatic tensioning device 7 disposed on the ground via a sheave 72 (see Patent Document 2).
As a result, as shown in FIG. 1, by applying the necessary internal tension (T ₀ : initial tension) according to the catenary curve to the notch chain C, the notch chain C is always tensed by applying an appropriate tension, thereby driving the drive shaft. It is possible to suppress the notch chain C from swinging due to the sloshing phenomenon near the water surface between the intermediate shaft 2 and the intermediate shaft 2, and to prevent the dropout.

As shown in FIG. 5, the automatic tensioning device 7 is housed in the main body 73 fixed to a ground mount and the like, and is supported by the lifting rod type detection body 75 via a pin 74 so as to be swingable. In addition, a tilting rod 76 that locks the connecting body at both ends, and a spring, hydraulic pressure, pneumatic pressure, which is housed in the main body 73 and operates to constantly pull up the rod-shaped detection body 75. A cylinder 77 such as a hydraulic pressure, an elevating means 77 such as an electric cylinder and a weight, and a detector 78, for example, a limit switch, which is activated when the detector 75 moves up and down more than a setting.
It should be noted that an alarm can be issued by operating the detector 78 that detects the movement of the detector 75, or the drive of the notch chain can be forcibly stopped.
Further, when the scale 73 is attached to the main body 73 and the detection body 75 and the notch chain C is extended by continuous operation, the amount of extension is displayed on the scale 79, and the amount of extension is drained from the settling basin P. To make it possible to identify safely from the ground and perform safe driving.

Next, the effect of this chain type sludge scraper D will be described.
1. In order to prevent the dropout of the notch chain C (and the flight F) due to the sloshing phenomenon, it is necessary to prevent the notch chain C from being detached from the wheel S1 of the drive shaft 1 and the wheel S2 of the intermediate shaft 2 that are close to the water surface. . In this chain-type sludge scraping machine D, the drive shaft 1 and the intermediate shaft 2 are provided with a chain skipping prevention device 5 and a chain detachment prevention device 6 that also serve as a chain detachment prevention device, respectively. It is possible to prevent the chain C from swinging and floating and falling off the wheels S1 and S2.
2. Since the chain detachment prevention device 6 installed on the intermediate shaft 2 is configured to be detachable from the intermediate shaft 2, the chain-type sludge scraper D can be easily maintained.
3. As a measure against sloshing, it is necessary to further suppress the swing of the notch chain C (and the flight F) in the vicinity of the water surface between the drive shaft 1 and the intermediate shaft 2, and an appropriate tension is always applied to keep the notch chain C tensed. There is a need. In this chain type sludge scraper D, an automatic tensioning device 7 is installed on the ground, and the notch chain C is always tensioned by applying an appropriate tension so that the sloshing near the water surface between the drive shaft 1 and the intermediate shaft 2 is obtained. The swing of the notch chain C (and the flight F) due to the phenomenon can be suppressed, and the dropout can be prevented. Moreover, since the automatic tensioning device 7 is installed on the ground, it is not necessary to drain the settling basin P in order to perform the tensioning work, and the work can be easily performed.
4). It is possible to prevent the notch chain C (and the flight F) from falling off due to the sloshing phenomenon and lead to a serious accident, and it is possible to provide a chain sludge scraping machine that can respond to an earthquake disaster.

  As mentioned above, although the chain 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 appropriately within the scope not departing from the gist thereof. The configuration can be changed.

  The chain sludge scraping machine of the present invention has a characteristic that it can prevent the chain attached with the flight from falling off due to the sloshing phenomenon in which the accumulated water in the sedimentation basin swings. In addition to being suitable for use in chain sludge scraping machines using notch chains, it can also be used in chain sludge scraping machines using other types of synthetic resin chains and SUS chains. Can do.

C Notch chain (chain)
D Chain type sludge scraper F Flight N Notch P Sedimentation basin S1 to S4 Wheel 1 Drive shaft 2 Intermediate shaft 3 Tail shaft 4 Head shaft 5 Chain skipping prevention device (Chain detachment prevention device)
6 Chain disengagement prevention device 61 Color 62 Side plate 63 Projection piece 7 Automatic tension device

Claims (2)

In a chain-type sludge scraping machine in which a drive device circulates and drives an endless chain, and a chain detachment prevention device is provided on the drive shaft and intermediate shaft of the water surface of the chain, the intermediate shaft chain detachment prevention device Are rotatably supported by an intermediate shaft attached to the wall of the sedimentation basin in a cantilevered manner, and collars that are inserted on both sides of the intermediate shaft with the wheel in between and are detachably fixed using screws. And a side plate provided on the collar so as to be along the side surface of the wheel, and an upper end portion of the side plate so as to form a clearance above the wheel and through which a connecting piece for connecting a flight to the chain can pass. A chain-type sludge scraping machine, characterized in that it is configured with protrusions provided respectively . Chain sludge raking machine according to claim 1, characterized by providing an automatic tensioning device of the chain on the ground.

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