JP5774418B2 - Notch chain type sludge scraper - Google Patents

Description

  The present invention relates to a notch chain type sludge scraper, and in particular, automatically adjusts the tension of a notch chain of a sludge scraper used in rectangular sedimentation basins such as sewers and waterworks, and cuts it. Is also related to a notch chain type sludge scraper.

  Conventionally, in the treatment of sewage and clean water, in order to remove impurities such as sand and other inorganic substances and organic substances contained in the raw water introduced into the rectangular sedimentation basin P, as shown in FIG. Sludge scraper D is installed. As this sludge scraping machine D, what used the chain Ca made from SUS has been used a lot.

In the sludge scraper D using the SUS chain Ca, as shown in FIG. 6, the chain Ca having a plurality of flights F attached at predetermined intervals is arranged at a predetermined position in the rectangular sedimentation basin P. Sprocket wheels S1, S2, S3, and S4 are fixed to the drive shaft, intermediate shaft, tail shaft, and head shaft, and are stretched endlessly between the sprocket wheels S1, S2, S3, and S4, and By driving the drive shaft and the sprocket wheel S1 with the drive device M disposed on the pond, the endless chain Ca is driven to circulate, and the chain Ca has an arrow F1 as shown in FIG. When moving along the pond bottom in the direction, the sludge settled on the pond bottom is scraped to the sludge pit P1 side, and when moving in the direction of the arrow F2 at the water surface position, scum floating on the water surface is removed. Scum Raked in Kemah S side, it is to be discharged.
The chain Ca has an internal tension (T ₀ ) required for the chain conveyor operation by a catenary curve of the chain Ca and the flight weight (W) of the inter-axis dimension L1 between the rear two-shaft intermediate shaft and the tail sprocket wheels S2 and S3. : Called initial tension).

  In recent years, synthetic resin chains have come to be used because they are light and easy to install due to corrosion and wear countermeasures, especially in sewers. In addition, synthetic resin chains have also been devised to reduce wear and extend life. As shown in FIG. 2, a notch chain as shown in FIG. 2 is used.

However, since these synthetic resin chains are light in weight, they have been obtained by a catenary curve having an inter-axis dimension L1 between the rear two-shaft intermediate shaft and the tail-shaft sprocket wheels S2 and S3 in the conventional SUS chain Ca. The internal tension (T ₀ : initial tension) required for the chain conveyor operation cannot be obtained with the same inter-axis length as that of the chain Ca, that is, with the same inter-axis dimension L1.
Therefore, when replacing an existing chain sludge scraper with a notch chain sludge scraper, the intermediate shaft and tail shaft are required to obtain the internal tension (T ₀ : initial tension) required for the chain conveyor operation by the catenary curve. It is necessary to change the position of the existing shaft so that the length between the sprocket wheels S2 and S3 is increased, that is, the inter-axis dimension L2 is increased. As shown in FIG. 7, the change in the inter-axis dimension (L1 → L2) is performed by moving the intermediate shaft to the inflow side of the rectangular sedimentation basin P (to the left in FIG. 6). If the position is not changed, the distance Sa between the intermediate shaft and the scum skimmer S will be separated from Sb, and the scum floating on the water surface cannot be scraped to the vicinity of the scum skimmer on the return flight, and the scum removal function is deteriorated. there were.

In addition, when a notch chain type sludge scraper is newly installed, it is necessary to install a scum skimmer on the inflow side of the sedimentation basin, and there is a problem that the water surface that can be removed by scraping the scum is reduced.
Furthermore, the chain-type sludge scraping machine needs to be regularly tensioned because chain elongation occurs as the operation continues. The tension of the chain is usually adjusted so that the tail shaft bearing at the bottom of the sedimentation basin slides with a screw (not shown). The water in the sedimentation basin is drained and the operator descends to the bottom of the sedimentation basin. The work is done by rotating the screw.

  Therefore, it takes time to drain the water in the settling basin, and as shown in FIGS. 3 and 4, in the multi-level (two-level, three-level) settling basin where the sedimentation ponds are stacked one above the other, it takes more time to drain the water. It takes a lot of time to tension the chain, and there is a problem that it is dangerous for the operator to descend to the lower layer, and the lower layer of the multi-level sedimentation basin directly confirms the operation of the scraping chain Therefore, when the chain is broken, it cannot be detected quickly, and there is a high possibility that it will lead to a serious accident, and it takes time and money to recover.

  Further, in the case of installing a notch chain type sludge scraper with the same distance L1 between the sprocket wheels S2 and S3 of the intermediate shaft and the tail shaft as in the case of the chain type sludge scraper, FIG. 8 and FIG. As shown in FIG. 9, a notch chain type sludge scraping machine to which a swinging weight shaft Ws is added has been proposed. However, it is necessary to cut out the part of the flight F that interferes with the roller Wr of the weight shaft Ws. The cutout part Fa cannot scrape the sludge, and the sludge scraping efficiency is reduced. In the lower layer, there was a problem that the chain elongation could not be visually confirmed, and therefore the chain breakage could not be detected.

In view of the problems of the conventional chain type sludge scraping machine, the present invention automatically adjusts the tension of the notch chain of the sludge scraping machine properly and always requires the internal tension necessary for proper chain conveyor operation. An object of the present invention is to provide a notch chain type sludge scraping machine that obtains (T ₀ : initial tension) and automatically detects the cutting of the chain.

In order to achieve the above object, the notch chain type sludge scraping machine of the present invention is a notch chain type sludge scraping machine in which an endless notch chain is circulated and driven by a driving device disposed on a pond. When connecting the end of both sides of the tail shaft, which stretches the chain and can move horizontally, to the automatic tensioning device installed on the upper part of the settling basin with two bendable connectors . The two connected bodies are respectively engaged with both ends of the tilting rod supported by the lifting rod type detecting body through the pins of the automatic tensioning device so as to be swingable. It is characterized in that a predetermined tension is always applied to the notch chain through the coupling body provided with the above.

In this case, the detection body, so as to move during cutting of the notch chain, the movement of the detection member may be configured to detect by a detector of the chain cutting detection unit.

  Further, the bendable connecting body can be a rope such as a wire rope, a chain, or a chain.

  Moreover, the scale for displaying the elongation amount of a notch chain can be attached to an automatic tension device.

According to notch chain sludge raking machine of the present invention, middle-axis, since the tension of the notch chain that missing catenary between the tail shaft can be properly compensated by the tension of the automatic tensioning device, the existing intermediate shaft position There is no need to change the SUS chain type sludge scraping machine made of SUS, and the distance between the intermediate shaft and the scum skimmer can be kept constant. Scum can also be discharged effectively.

  Further, the automatic tensioning device includes a detecting body that is connected to one end of a bendable connecting body and that moves when the notch chain is cut, and a detector that detects the movement of the detecting body. By providing the chain break detection means, appropriate tension can always be applied to the notch chain, draining water as in the past, and regular tension work when the worker descends to the bottom of the channel is unnecessary, Operation management can be easily performed.

  Moreover, the tension | tensile_strength adjustment of a notch chain can be performed automatically automatically and appropriately by making a connecting body which can be bent into ropes, such as a wire rope, a chain, and a chain.

  In addition, by adding a scale to display the amount of notch chain extension on the automatic tensioning device, it is possible to constantly check the amount of notch chain extension from the sedimentation basin floor without draining the rectangular sedimentation basin. And operation management can be easily performed.

It is longitudinal section explanatory drawing installed in the rectangular sedimentation basin which shows one Example of the notch chain type sludge scraping machine of this invention. 1 link of the notch chain of the same notch chain type sludge scraping machine is shown, (A) is a top view, (B) is a front view. It is the front longitudinal cross-sectional view which installed the notch chain type sludge scraping machine in the rectangular sedimentation basin of two levels. It is the same side surface longitudinal cross-sectional view. It is a section explanatory view of an automatic tension device. It is a longitudinal cross-sectional explanatory drawing of the conventional chain type sludge scraping machine made from SUS. It is vertical section explanatory drawing at the time of replacing the SUS chain type sludge scraping machine with the notch chain type sludge scraping machine. It is vertical section explanatory drawing of the notch chain type sludge scraping machine which added the rocking | fluctuation type weight axis | shaft. It is explanatory drawing of the flight of a weight axis | shaft roller part.

  Embodiments of the notch chain type sludge scraping machine of the present invention will be described below based on the drawings.

1 to 5 show an embodiment of the notch chain type sludge scraping machine of the present invention.
In the treatment of sewage and clean water, a sludge scraper D is installed in the rectangular sedimentation basin P in order to remove impurities such as sand and other inorganic substances and organic substances contained in the raw water introduced into the rectangular sedimentation basin P. . When the notch chain type sludge scraper D is adopted as the sludge scraper D, as shown in FIG. 1, a drive shaft, an intermediate shaft, and a tail shaft are disposed at predetermined positions in the rectangular sedimentation basin P. The endless notch chains C and C are stretched between the sprocket wheels S1, S2, S3 and S4 fixed to the end of each axis of the head shaft so as to be parallel to each other and disposed on the pond. The endless notch chain C is circulated and driven by the driven device M, and a large number of flights F are attached at predetermined intervals so as to be spanned between two adjacent notch chains C, C in parallel. Configure.

  Since a plurality of flights F are arranged and fixed at a predetermined interval on the notch chain C, as the notch chain C circulates, the flight F moves toward the pond in the direction of the arrow F1, as shown in FIG. When moving along the bottom, the sludge deposited on the bottom of the pond is scraped to the sludge pit P1 side, and when moving in the direction of the arrow F2 at the water surface position, the scum floating on the water surface is moved to the scum skimmer S side. Can be scraped and discharged.

In this case, as a countermeasure against the corrosion and wear of the notch chain C, the notch chain made of synthetic resin as shown in FIG. 2 is used, for example.
The notch chain C has an I portion C1 formed on one end side of the link, a clevis portion C2 formed on the other end side, and an I portion C1 of one adjacent link formed on the clevis portion C2 formed on the other side link. The notch chain C having a required length is formed by inserting and inserting the pin C3 into the insertion portion so that each link is continuous.
The link of the notch chain C is provided with a notch N having a concave shape. A pin (not shown) of the main sprocket of the drive shaft meshes with this notch portion N, and the endless notch chain C is circulated and driven.
An attachment (not shown) for attaching the flight F in a substantially vertical direction is directly attached to the notch chain C by bolting or the like.

The sprocket wheel S3 fixed to the tail shaft end is configured to be movable in the horizontal direction, thereby applying a constant tensile force to the two notch chains C, C stretched on the sprocket wheel S3. . Regardless of the elongation of the notch chain C, a constant tensile force is always applied by the movement t of the sprocket wheel. The movement of the sprocket wheel S3 is not particularly limited. For example, a tail shaft bearing is slidably supported on a slide mechanism 10 such as a guide rail disposed in the horizontal direction, and both shafts of the tail shaft are supported. Bendable coupling body 1 fastened to each end, which is not particularly limited, for example, fastened to an automatic tensioning device E in which the other end side of a rope such as a wire rope, chain, chain, etc. is arranged on a pond Thus, a required tensile force is always applied to the sprocket wheel S3 on the tail shaft side via the bendable connecting body 1.
It should be noted that each of the two connected bodies 1 is bent through a plurality of sheaves 2 and led to the automatic tensioning device E disposed on the pond.
As a result, even if the distance between the scum skimmer and the tail shaft is the same as that of the SUS chain sludge scraping machine, as shown in FIG. 1, the internal tension (T ₀ : initial tension).

Further, as shown in FIG. 5, the automatic tensioning device E is housed in the main body 3 fixed on a pond on a pond, etc., and is swingable to a lifting rod type detection body 5 via a pin 4. And a spring, hydraulic pressure, pneumatic pressure that is housed in the main body and acts to always pull up the rod-shaped detection body 5. It is constituted by a cylinder such as a hydraulic pressure, an elevating means 7 such as an electric cylinder, and a suspension, and a detector 8, such as a limit switch, which is activated when the detector 5 is raised or lowered above a set value.
It should be noted that an alarm is issued by the operation of the detector 8 (switch) adapted to detect the movement of the detection body 5 or the driving of the notch chain is forcibly stopped.
Moreover, when the scale 9 is attached to the main body 3 and the detection body 5 (elevating rod) and the notch chain is extended by continuous operation, the extension amount is displayed on the scale 9 and the extension amount is displayed in the rectangular sedimentation basin P. It will be easily identified from the pond without draining water so that it can be operated safely.

  The embodiment shown in FIGS. 3 and 4 is a case where the rectangular sedimentation basin P is made up of two layers in the upper and lower layers, and is not shown in each layer. However, like the embodiment shown in FIG. A shaft, a tail shaft, and a head shaft are arranged, and two endless notch chains C and C are parallel to each other between sprocket wheels S1, S2, S3, and S4 fixed to the ends of the shafts. The endless notch chains C are circulated and driven between the adjacent two notch chains C and C by the driving devices M disposed on the pond. In this way, a large number of flights F are attached at predetermined intervals.

  In addition, even if this rectangular sedimentation basin P has a single level as shown in FIG. 1 and also has a vertical two-level type as shown in FIG. 3 and FIG. As shown in FIGS. 3 and 4, the tail shaft is supported so as to be movable in the horizontal direction along the bottom of the pond, and this tail shaft or a coupling body that can be bent to the bearing of the tail shaft is limited. Rather, the ends of the ropes such as wire ropes, chains and chains are fixed, and the other end side is locked to the automatic tensioning device E installed on the pond via a sprocket wheel or the like, thereby extending the notch chain C. A detector attached to the automatic tensioning device E when the notch chain C is cut, and is not particularly limited. For example, limit switches It becomes capable of detecting disconnection of the notch chain instantaneously by like.

  As mentioned above, although the notch chain type sludge scraping machine of the present invention has been described based on the embodiments, the present invention is not limited to the configurations described in the above embodiments, and the configurations described in the embodiments are appropriately combined. The configuration can be changed as appropriate without departing from the spirit of the invention.

  The notch chain type sludge scraping machine of the present invention automatically adjusts the tension of the notch chain of the sludge scraping machine properly and always obtains the internal tension necessary for proper chain conveyor operation, and cuts the chain. Since it has the characteristic that it can detect automatically, it can use suitably for the use of the sludge scraper which touches in a rectangular sedimentation basin.

C Notch chain D Notch chain type sludge scraper E Automatic tension device F Flight N Notch P Rectangular sedimentation basin S1 to S4 Sprocket wheel 1 Connection body 2 Sheave 3 Body of automatic tension device 4 Pin 5 Lifting rod type detector 6 Tilt rod 7 Lifting means 8 Limit switch detector 9 Scale 10 Slide mechanism

Claims (4)

  In a notch chain type sludge scraping machine in which the endless notch chain is circulated and driven by a driving device arranged on the pond, both sides of the tail shaft are stretched and movable in the horizontal direction. When connecting the two ends of the automatic tensioning device installed on the shaft end of the pond and the upper part of the settling basin with two flexible connecting members, the two connecting members are connected to the lifting rod via the pin of the automatic tensioning device. So as to be locked at both ends of the tilting rod supported so as to be able to swing on the detector of the type, and to always give a predetermined tension force to the notch chain via the connecting body to which the tensile force is given by the automatic tensioning device. A notch chain type sludge scraper. Detection body, so as to move during cutting of the notch chain, the movement of the detection member, the chain cleavage detection means, characterized that you have to be detected by the detector according to claim 1, wherein the notch chain sludge take- Machine.   The notch chain type sludge scraper according to claim 1 or 2, wherein the bendable connecting body is a rope such as a wire rope, a chain, or a chain.   The notch chain type sludge scraping machine according to claim 1, 2, or 3, wherein a scale for displaying an extension amount of the notch chain is attached to the automatic tensioning device.

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