JP6883209B2 - Sludge scraper monitoring device and monitoring method - Google Patents

Description

The present invention relates to a monitoring device and a monitoring method for a sludge collector, and in particular, runs a long flight body in a direction perpendicular to its longitudinal direction to scrape sludge accumulated on the bottom of a sedimentation basin. Regarding the monitoring device and monitoring method of the sludge scraper.

In water treatment of clean water and sewage, a settling basin is used to separate sludge contained in water as a sediment. In the settling basin, sludge settles due to its own weight and deposits as sediment on the bottom of the settling basin. Therefore, in order to discharge the sludge from the sedimentation basin, a sludge scraper is used to scrape the accumulated sludge into a sludge pit provided at one end of the bottom surface of the sedimentation basin.

Here, the apparent density of sludge deposited in the sedimentation basin in the water purification process in water is close to the density of water, and the sludge scraping load is usually small. However, when raw water with high turbidity flows in, the load may temporarily increase, so the sludge scraper requires a drive device with a large power. In addition, the link belt type sludge scraper is normally operated continuously, but intermittent operation is performed to prevent the sedimented sludge from flying up during scraping, to discharge the sedimented sludge at a higher concentration, and to save energy. I have something to do. In that case, the load of sludge may overload the drive device or break the scraping chain.

The sludge scraper of the settling basin used in the water purification plant includes a vertical scraper method that scrapes toward the upstream side parallel to the water flow direction in the sedimentation basin and a horizontal scraper method that scrapes the sludge so that it is orthogonal to the water flow. However, especially in the case of the vertical scraping method, the distance for scraping sludge is long, and intermittent operation tends to cause an overload. In addition, even with the horizontal scraping method, the amount of sedimentation is large on the upstream side, and overload is likely to occur.

Therefore, a method for detecting a chain breakage of a sludge scraper has been conventionally proposed. For example, Patent Document 1 describes a chain breakage detection device for a sludge scraper that drives a chain by a drive wheel to travel a flight movable body fixed to the chain and scrape sludge in a sedimentation pond. A chain monitoring device having a detection arm arranged along the chain on a drive wheel and a sensor for detecting that the detection arm is pushed by the chain, and a chain holder for restraining the movement of the chain. A chain breakage detection device has been proposed, wherein the chain holder is arranged adjacent to the drive wheel and is arranged below the chain.

Japanese Unexamined Patent Publication No. 2014-024018

In the device disclosed in Patent Document 1, when the chain is broken, the tension of the chain is lost, so that the chain is loosened and the chain is held by the chain holder. If the drive wheel continues to feed the chain in this state, the lost chain will be lifted near the drive wheel and the chain will push the detection arm, which can be detected by the sensor to detect the breakage of the chain. It is supposed to be.

However, in the device disclosed in Patent Document 1, the broken chain cannot be detected until the lost chain is lifted near the drive wheel and the chain pushes the detection arm. In addition, after the chain is actually broken, there is a considerable time lag before the breakage of the chain is detected. For this reason, the sludge scraper operates for a considerable period of time even after the chain is actually broken, so that the damage may spread to places other than the chain, such as the drive wheel.

Further, the device disclosed in Patent Document 1 has problems that the chain breakage detecting device itself for detecting the chain breakage is liable to break down and erroneous detection is likely to occur because the structure is complicated. Further, in the apparatus disclosed in Patent Document 1, the apparatus becomes large-scale and the manufacturing cost becomes high. Further, the apparatus disclosed in Patent Document 1 can only detect a breakage of the chain, and cannot detect a sign of the breakage of the chain or other defects, for example, elongation of the chain due to aging. There is. In addition, there is a problem that it is difficult to attach it to an existing sludge scraper.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a monitoring device and a monitoring method for a sludge scraper capable of more effectively detecting a defect of the sludge scraper. ..

In order to solve the above-mentioned problems, the first invention according to the present invention is to run a long flight body in a direction perpendicular to its longitudinal direction to scrape a volume of sludge on the bottom of a settling basin. A monitoring device for a sludge scraper, the sludge scraper is a pair of endless chains in which a plurality of chain links in which a plurality of the flight bodies are fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly. The monitoring device includes a plurality of wheels that are arranged in the settling basin and are circulated and driven by the endless chain that is stretched to scrape the sludge that has settled on the bottom of the pond by the flight body. It is characterized by including a first detection unit that detects the rotational movement of at least one of the endless chains, and at least one detection unit of the second detection unit that detects the rotational movement of at least one of the plurality of wheels.

According to the above configuration, since the first and second detection units detect the rotational movement of at least one of the endless chain or the wheel, it is possible to more effectively detect the malfunction of the sludge scraper.

Further, in the second invention according to the present invention, in the first invention, the endless chain is configured by connecting a plurality of chain links, and the first detection unit detects the first sensor that detects the chain links. It is characterized in that the rotational operation of the endless chain is detected based on the pattern.

According to the above configuration, since the rotation operation of the endless chain is detected based on the detection pattern of the first sensor that detects the chain link, the rotation operation of the endless chain can be easily detected. Further, since the configuration for detecting the rotational operation of the endless chain can be simplified, it can be manufactured at low cost. Further, since the first sensor is provided at a position away from the endless chain, it can be easily attached to an existing sludge scraper.

Further, the third invention according to the present invention is characterized in that, in the second invention, the time-dependent change of the endless chain is detected based on the change of the detection pattern of the first sensor.

According to the above configuration, since the time-dependent change of the endless chain is detected based on the change of the detection pattern of the first sensor, a sign of chain breakage and other defects, for example, chain elongation due to time-dependent change, are detected. be able to. Moreover, various detections can be performed with one sensor.

Further, the fourth invention according to the present invention is characterized in that, in the second or third invention, the rotation speed of the endless chain is detected based on the detection pattern of the first sensor.

According to the above configuration, since the rotation speed of the endless chain is detected based on the detection pattern of the first sensor, the operating state of the endless chain can be detected. Moreover, various detections can be performed with one sensor.

Further, in the fifth invention according to the present invention, in any one of the first to fourth inventions, the wheel has a concavo-convex pattern periodically provided on the surface, and the second detection unit is the wheel. It is characterized in that the rotational movement of the wheel is detected based on the detection pattern of the second sensor that detects the unevenness pattern.

According to the above configuration, since the rotation motion of the wheel is detected based on the detection pattern of the second sensor by the uneven pattern provided periodically on the wheel surface, the rotation motion of the wheel can be easily detected. In addition, since the configuration for detecting the rotational movement of the wheel can be simplified, it can be manufactured at low cost. Further, since it is provided at a position away from the wheel, it can be easily attached to an existing sludge scraper.

Further, the sixth invention according to the present invention is characterized in that, in the fifth invention, the rotation speed of the wheel is detected based on the detection pattern of the second sensor.

According to the above configuration, since the rotation speed of the wheel is detected based on the detection pattern of the second sensor, the operating state of the wheel can be detected. Moreover, various detections can be performed with one sensor.

Further, the seventh invention according to the present invention is a method for monitoring a sludge scraper in which a long flight body is run in a direction perpendicular to the longitudinal direction thereof to scrape the sludge that accumulates at the bottom of the settling basin. The sludge scraper is arranged in the settling basin with a pair of endless chains in which a plurality of chain links fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly. The monitoring device includes a plurality of wheels for attracting sludge settled on the bottom of the pond by the flight body by circulating driving the endless chain provided and stretched, and the monitoring device is at least one of the pair of endless chains. It is characterized in that the rotational operation of the endless chain is detected based on the detection result of the first detection unit that detects the rotational operation.

According to the above configuration, since the first detection unit detects the rotational operation of the endless chain, it is possible to more effectively detect the malfunction of the sludge scraper.

As described above, according to the present invention, it is possible to provide a monitoring device and a monitoring method for a sludge collecting machine that can more effectively detect a malfunction of the sludge collecting machine.

It is sectional drawing of a settling basin and a sludge scraper. It is a top view of a sprocket wheel. It is a block diagram of the chain link which constitutes an endless chain. It is a figure which shows the meshing of a sprocket wheel and an endless chain. It is sectional drawing of the support shaft member. It is a figure which shows the other meshing of a sprocket wheel and an endless chain in an embodiment. It is a block diagram of the monitoring device of a sludge scraper. It is a figure which shows an example of the installation position of the 1st sensor. It is a figure which shows an example of the installation position of the 2nd sensor. It is a figure which shows the detection pattern of the 1st and 2nd sensors. It is a flowchart which shows the stop operation of a motor by the control panel of the monitoring device of a sludge scraper. It is a flowchart which shows the monitoring operation of the time-dependent change of the endless chain by the control panel of the monitoring device of the sludge scraper. It is a flowchart which shows the monitoring operation of the rotation speed of an endless chain and a main sprocket wheel by the control panel of the monitoring device of a sludge scraper. It is a flowchart which shows the operation of the server of the monitoring device of a sludge scraper.

First, the sludge scraper according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a view showing a vertical cross section of a sedimentation basin A in a water and sewage field. The sludge scraper 1 according to the embodiment is installed in the settling basin A. The first sensor 711, the second sensor 712, and the control panel 720 shown in FIG. 1 will be referred to in the description after FIG.

As shown in FIG. 1, the sludge scraper 1 includes a flight body 100, an endless chain 200, a main sprocket wheel 300, a plurality of driven sprocket wheels 400, and a driving means 500. A main sprocket wheel 300 and a plurality of driven sprocket wheels 400 are installed on the left and right walls of the settling pond A, respectively, and the main sprocket wheel 300 is driven by a motor 520 for driving and rotating the main sprocket wheel 300. The device (driving means) 500 is connected via the power transmission belt 510.

Here, the main sprocket wheel 300 is supported on the wall surface of the settling basin A by a support shaft member 600 above the water surface WL at the longitudinal end of the settling basin A, and the driven sprocket wheel 400 of 1 is of the settling basin A. The other driven sprocket wheel 400 is supported above the water surface WL at approximately the center in the longitudinal direction, and the other driven sprocket wheel 400 is supported on the wall surface of the settling basin A by a support shaft member 600 near the bottom BT on both ends in the longitudinal direction of the settling basin A. There is.

The endless chain 200 is composed of a pair of left and right endless chains 200 rotatably stretched on a main sprocket wheel 300 and a plurality of driven sprocket wheels 400 provided on the left and right walls of the settling basin A, respectively, and a plurality of chain links 210. (See FIG. 3) are pivotally attached by a connecting shaft and connected endlessly.

A long flight body 100 is bridged and fixed to the left and right endless chains 200 at predetermined intervals, and the main sprocket wheel 300 is rotated to move the endless chain 200 toward FIG. 1 in the settling basin A. The sludge settled on the bottom of the pond is attracted to the sludge pit (discharge groove) 15 by the flight body 100 by circulating driving clockwise (CW).

Here, each member of the endless chain 200, the main sprocket wheel 300, and the driven sprocket wheel 400 of the sludge scraper 1 of the present embodiment is a synthetic resin material selected from PET (polyethylene terephthalate) or PEN (polyethylene naphthalate). Consists of. Further, PET or PEN, which are synthetic resins constituting each member of the endless chain 200, the main sprocket wheel 300, and the driven sprocket wheel 400 of the sludge scraper 1 according to the present embodiment, is transparent or translucent in a non-colored state. It is preferable that it is present, that is, it is not crystallized.

(Sprocket wheel)
FIG. 2 is a plan view of the main sprocket wheel 300. Hereinafter, the configuration of the main sprocket wheel 300 will be described with reference to FIG. As shown in FIG. 2, the main sprocket wheel 300 is a disk-shaped member made of a synthetic resin material selected from PET or PEN, and has a through hole 301 for passing a shaft (main shaft) in the center.

The main sprocket wheel 300 has a tooth portion 302 formed on the circumference having a predetermined width. When the tooth portion 302 meshes with the endless chain 200, the main sprocket wheel 300 can be rotated to drive the endless chain 200 in a circulating manner. Further, the main sprocket wheel 300 has a rim portion 303 that is raised so as to surround the through hole 301 from the viewpoint of ensuring strength, and the rim portion 303 faces the outer peripheral side (tooth portion 302) of the main sprocket wheel 300. A plurality of extending rim portions 304 are provided. Since the configuration of the driven sprocket wheel 400 is the same as the configuration of the main sprocket wheel 300, overlapping description will be omitted.

(Endless chain)
FIG. 3A is a top view of the chain link 210 constituting the endless chain 200. FIG. 3B is a side view of the chain link 210 constituting the endless chain 200. Hereinafter, the configuration of the endless chain 200 will be described with reference to FIGS. 3 (a) and 3 (b). As shown in FIG. 3, the endless chain 200 is configured by connecting a plurality of chain links 210. Each chain link 210 is made of a synthetic resin material selected from PET or PEN, and has a tubular base 211 having a first through hole 210H (boss) for inserting a connecting shaft 240 (see FIG. 4). A pair of plate portions 220 and 230 extending symmetrically in the direction perpendicular to the longitudinal direction from both ends 211A and 211B of the base portion 211 are provided.

The plate portions 220 and 230 are formed by the second through holes (bosses) 220H and 230H and the second through holes 220H and 230H for inserting the connecting shaft 240 (see FIG. 4) on the side opposite to the base portion 211, respectively. First, the plate portions 220 and 230 are raised in the direction perpendicular to the inner main surfaces 220A and 230A facing each other and the outer main surfaces 220A and 230B opposite to the inner main surfaces 220A and 230A so as to surround the periphery. Rib portions 220C, 230C and second rib portions 220D, 230D. Further, the pair of plate portions 220 and 230 are raised in the direction perpendicular to the outer main surfaces 220B and 230B, respectively, and extend from the first through hole 210H to the second through holes 220H and 230H. It has third rib portions 220E and 230E. Then, the second through holes 220H and 230H of the chain link 210 on the upper side with respect to the rotation direction of the endless chain 200 and the first through holes 210H of the chain link 210 on the lower side are connected to the connecting shaft 240 (see FIG. 4). The endless chain 200 can be obtained by pivotally attaching to) and connecting endlessly.

Here, from the first through hole 210H (boss) provided in the base 211 to the second through holes (boss) 220H, 230H for inserting the connecting shaft 240 provided on the side opposite to the base 211. The linear distance L1 is about 152.4 mm. Further, in order to secure the strength of the chain link 210, the thickness D1 of the front end portions T1 of the pair of plate portions 220 and 230 is preferably 7 mm or more, and the thickness D2 of the rear end portions T2 is 5 mm or more. Is preferable.

Further, the plate portions 220 and 230 are raised in the direction perpendicular to the inner main surfaces 220A and 230A facing each other so as to surround the second through holes 220H and 230H of the pair of plate portions 220 and 230. The thickness D3 of the first rib portions 220C and 230C is preferably in the range of 0.5 mm to 1.5 mm. Here, the first rib portions 220C and 230C have a trapezoidal cross-sectional shape, and the uppermost surface of the trapezoid is a flat surface having a predetermined width.

FIG. 4 is a diagram showing the engagement between the sprocket wheel and the endless chain. As shown in FIG. 4, a tooth portion 302 formed with a predetermined width enters and meshes with the gap 210S (see FIG. 3) formed when the chain link 210 is connected on the circumference of the main sprocket wheel 300. As shown in FIG. 1, as the main sprocket wheel 300 rotates, the endless chain 200 is circulated and driven in the settling basin A clockwise (CW) toward FIG. Is scraped to the sludge pit (discharge groove) 15.

FIG. 5 is a cross-sectional view of the support shaft member 600. The bottom 600S of the support shaft member 600 is fixed to the wall surface of the settling basin A, and a constricted portion 610 for rotatably engaging the main sprocket wheel 300 or the driven sprocket wheel 400 is provided at the upper portion. In order to secure the strength of the support shaft member 600, it is preferable that the thickness D1 of the constricted portion 610 is 12 mm or more, the thickness D2 of the shoulder portion 620 is 15 mm or more, and the thickness D3 of the main body portion 630 is 13 mm or more. The support shaft member 600 may generate a rubbing noise because the main sprocket wheel 300 or the driven sprocket wheel 400 rotates and slides. In such a case, the support shaft member 600, the main sprocket wheel 300, and the driven sprocket wheel 400 are made of a material having excellent slidability, for example, UHMW (ultra high molecular weight polyethylene) used for resin bearings and the like. May be good.

As described above, the sludge scraper 1 according to the present embodiment causes the long flight body 100 to travel in the direction perpendicular to the longitudinal direction thereof, and collects the sludge that accumulates in the bottom BT of the settling basin A. It is a sludge scraper 1 that scrapes. The sludge scraper 1 is arranged in a settling pond with a pair of endless chains 200 in which a plurality of flight bodies 100 are fixed at predetermined intervals and a plurality of chain links 210 are pivotally attached by a connecting shaft and connected endlessly. It includes a main sprocket wheel 300 and a driven sprocket wheel 400 that circulate and drive the stretched endless chain 200 to scrape the sludge settled on the pond bottom BT by the flight body 100.

The sludge scraper 1 is made of a synthetic resin material in which each member of the endless chain 200, the main sprocket wheel 300, and the driven sprocket wheel 400 is selected from PET or PEN. Therefore, the sludge scraper 1 is resistant to corrosion and is inexpensive. In addition, since the weight is lighter than that of a sludge scraper made of stainless steel, the construction period at the site can be shortened, and the construction cost is lower than before. Further, PET and PEN do not release harmful substances such as formaldehyde like POM (polyacetal or polyoxymethylene), and therefore can be used not only in sewage treatment but also in clean water treatment.

Further, the plurality of chain links 210 of the sludge scraper 1 according to the present embodiment have a tubular base 211 having a first through hole (boss) 210H for inserting the connecting shaft 240, and a base 211, respectively. A pair of plate portions 220 and 230 extending symmetrically in the direction perpendicular to the longitudinal direction from both ends 211A and 211B are provided.

The plate portions 220 and 230 surround the second through holes (bosses) 220H and 230H for inserting the connecting shaft 240 on the opposite sides of the base portion 211 and the circumferences of the second through holes 220H and 230H, respectively. In this way, the first and second plates are raised in the directions perpendicular to the inner main surfaces 220A and 230A and the outer main surfaces 220A and 230B opposite to the inner main surfaces 220A and 230A, respectively. It is characterized by having rib portions 220C and 230C of the above.

As described above, the pair of plate portions 220, 230 constituting each chain link 210 of the sludge scraper 1 according to the present embodiment has a second through hole for inserting the connecting shaft 240 on the side opposite to the base portion 211. (Boss) It has 220H and 230H. Then, the inner main surfaces 220A and 230A and the inner main surfaces 220A and 230A opposite to each other so that the plate portions 220 and 230 face each other so as to surround the second through holes 220H and 230H, and the outer main surfaces 220B on the opposite side. It has first rib portions 220C, 230C and second rib portions 220D, 230D, which are raised in the direction perpendicular to 230B, respectively. Therefore, sufficient strength can be obtained even if each member of the chain link 210 is made of a synthetic resin material.

Further, the pair of plate portions 220 and 230 of the plurality of chain links 210 of the sludge scraper 1 according to the present embodiment are raised in the direction perpendicular to the outer main surfaces 220B and 230B, respectively, and the first through hole 210H Since it has the third rib portions 220E and 230E extending from the to the second through holes 220H and 230H, the strength can be further increased.

Further, PET or PEN, which are synthetic resins constituting each member of the endless chain 200, the main sprocket wheel 300, and the driven sprocket wheel 400 of the sludge scraper 1 according to the present embodiment, is transparent or translucent in a non-colored state. That is, it is preferable that it is not crystallized.

PET and PEN are transparent or translucent to visible light in the non-crystalline state (in the case of the non-colored state), but become white or milky white in the non-colored state when crystallized. When PET or PEN crystallizes, it becomes vulnerable to external force, and cracks and chips are likely to occur. The endless chain 200 of the sludge scraper, the main sprocket wheel 300, and the driven sprocket wheel 400 are subject to a large force (usually a force of 500 kg or more is applied, and it is required that the product performance does not break even if a force of 3000 kg is applied). It is preferable that it is not crystallized because it is added.

The "non-crystallized state (non-crystallized state)" in this embodiment refers to a case where the non-crystallized state or the degree of crystallinity is considerably low, or the crystal size is fine in a practical state. In that case, PET and PEN are transparent plastics. On the other hand, when the crystallinity is high to some extent in a practical state, it becomes an opaque plastic. This is because the polymer is a large molecule, it is almost impossible to crystallize the whole, and as a whole, microcrystalline and non-crystalline parts are mixed, and the refractive index of the crystalline and non-crystal parts is different, so the interface between them. It is thought that refraction and diffuse reflection of light occur in the crystal, and as a result, it becomes opaque as a whole.

Non-crystallized PET or PEN that is transparent or translucent in a non-colored state is used for the synthetic resin constituting each member of the endless chain 200, the main sprocket wheel 300, and the driven sprocket wheel 400 to which such a large force is applied. It is possible to provide a sludge scraper 1 which is less likely to be cracked or chipped and has sufficient strength.

Further, the thickness D1 of the front end portion T1 of the pair of plate portions 220, 230 included in the chain link 210 constituting the endless chain 200 of the sludge scraper 1 according to the present embodiment is 7 mm or more, and the thickness of the rear end portion T2. D1 is 5 mm or more. Therefore, sufficient strength can be ensured for the chain link 210 to which a large force is applied, and it is possible to suppress the possibility that the endless chain 200 has a problem such as cutting.

Further, the sludge scraper 1 according to the present embodiment surrounds the second through holes 220H and 230H of the pair of plate portions 220 and 230 included in the chain link 210 constituting the endless chain 200 so as to surround the plate portions. First rib portions 220C and 230C having a thickness D3 of 0.5 mm to 1.5 mm, which are raised in the directions perpendicular to the inner main surfaces 220A and 230A facing each other, are provided, and the first rib portions are provided. The 220C and 230C have a trapezoidal cross-sectional shape, and the uppermost surface of the trapezoid is a flat surface having a predetermined width.

Therefore, a force is applied parallel to the longitudinal direction of the endless chain 200, and it is possible to effectively suppress an unreasonable force such as twisting or twisting of the chain link 210 in the licking direction. Therefore, it is possible to more effectively suppress the possibility that the endless chain 200 may have a problem such as cutting.

FIG. 6 is a diagram showing the meshing of the sprocket wheel and the endless chain in another embodiment. In the above embodiment, as shown in FIG. 4, a tooth portion 302 formed with a predetermined width enters and meshes with the gap 210S formed when the chain link 210 is connected on the circumference of the main sprocket wheel 300. ..

However, the engagement between the sprocket wheel and the endless chain is not limited to the above embodiment. For example, as shown in FIG. 6, a recess (notch) 210N is provided in the lower portion of the chain link 210 constituting the endless chain 200, and the chain link 210 is provided. The engagement pin 300P provided in the main sprocket wheel 300 may be engaged with the recess 210N at the lower part of the chain link 210, and the rotational force of the main sprocket wheel 300 may be transmitted to the chain link 210.

Next, a monitoring device and a monitoring method for the sludge scraper according to the present invention will be described with reference to FIGS. 1 and 7 to 10. The same configurations as those described with reference to FIGS. 1 to 6 are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 7 is a configuration diagram of a monitoring device 7 (hereinafter, also referred to as a monitoring device 7) of the sludge scraper according to the embodiment. As shown in FIG. 7, the monitoring device 7 includes a first sensor 711, a second sensor 712, a control panel 720, and a server 730.

As shown in FIG. 1, the first sensor 711 is attached above the water surface WL of the settling basin A and detects the endless chain 200. Specifically, as shown in FIG. 8A, the plate portion 220 of the chain link 210 constituting the endless chain 200 in a plan view and above the endless chain 200, as shown in FIG. 8B. It is attached to the wall surface of the settling basin A by the mounting bracket TK so as to be substantially in the center between 230. The first sensor 711 is an optical sensor that irradiates the endless chain 200 with irradiation light L1 (for example, laser light) and detects the presence or absence of the endless chain 200 by the reflected light from the endless chain 200.

As shown in FIG. 1, the second sensor 712 is attached above the water surface WL of the settling basin A and detects the main sprocket wheel 300. Specifically, as shown in FIG. 9A, the main sprocket wheel 300 is attached to the wall surface of the settling basin A or the like by the mounting bracket TK at a position on the track C (broken line) where the through hole 305 exists. .. The second sensor 712 is an optical sensor that irradiates the main sprocket wheel 300 with irradiation light L2 (for example, laser light) and detects the presence or absence of the main sprocket wheel 300 by the reflected light from the main sprocket wheel 300. To do.

FIG. 10A is a diagram showing a detection pattern of the first sensor 711. The irradiation light L1 emitted from the first sensor 711 passes through the gap 210S between the plate portions 220 and 230 of the chain links 210 constituting the endless chain 200, and is reflected by the base portion 211. Therefore, in a state where the main sprocket wheel 300 is rotating at a constant speed, in other words, when the endless chain 200 is rotating at a constant speed, reflected light is generated at regular intervals. As a result, the detection pattern as shown in FIG. 10A is output from the first sensor 711.

FIG. 10B is a diagram showing a detection pattern of the second sensor 712. The irradiation light L2 emitted from the second sensor 712 passes through the region where the through hole 305 exists in the main sprocket wheel 300, and is reflected in the other regions. Therefore, when the main sprocket wheel 300 is rotating at a constant speed, reflected light is generated at regular intervals. As a result, the detection pattern as shown in FIG. 10B is output from the second sensor 712.

In this embodiment, the ratio of the region through which the irradiation light L1 of the first sensor 711 passes and the region not passing through is different from the ratio of the region through which the irradiation light L2 of the second sensor 712 passes and the region not passing through. As shown in FIGS. 10A and 10B, the detection pattern of the first sensor 711 and the detection pattern of the second sensor 712 are different from each other.

As shown in FIG. 7, the control panel 720 includes a wireless communication unit 721, a first detection unit 722, a second detection unit 723, a storage unit 724, and a control unit 725. The wireless communication unit 721 wirelessly communicates with the server 730, and includes data including detection patterns output from the first sensor 711 and the second sensor 712, alerts output from the first detection unit 722 and the second detection unit 723, and the like. Send and receive control signals. When transmitting data or the like, the wireless communication unit 721 assigns an identifier (ID) and transmits the data to the server 730. The first detection unit 722 detects the rotational operation of the endless chain 200 based on the detection pattern of the chain link 210, that is, the first sensor 711 that detects the endless chain 200.

More specifically, the first detection unit 722 detects whether or not the endless chain 200 is rotating based on the ON / OFF detection pattern output from the first sensor 711. If the first sensor 711 is not turned on for a predetermined time (for example, 120 sec), the first detection unit 722 determines that the endless chain 200 is not rotating and outputs an alert.

Further, the first detection unit 722 detects the rotation speed of the endless chain 200 based on the ON / OFF detection pattern output from the first sensor 711. Specifically, the first detection unit 722 has a distance between the chain links 210 constituting the endless chain 200 stored in advance in the storage unit 724 (from the first through hole 210H (boss) to the side opposite to the base 211. The linear distance L1 (m) to the second through holes (bosses) 220H and 230H for inserting the provided connecting shaft 240, and the ON output from the first sensor 711 per unit time (for example, 1 min). The rotation speed (m / min) of the endless chain 200 is detected by multiplying the number of times.

Further, the first detection unit 722 detects the time-dependent change of the endless chain 200 (for example, the elongation of the endless chain 200) based on the ON / OFF detection pattern output from the first sensor 711. Specifically, the first detection unit 722 sets the detection interval (msec) of the reflected light (ON) to be output from the first sensor 711 during steady operation, which is stored in advance in the storage unit 724, and the actual first detection interval (msec). The change with time of the endless chain 200 is detected by comparing the detection interval (msec) of the reflected light (ON) output from the sensor 711. Further, the first detection unit 722 outputs an alert when the deviation of the detection interval becomes a predetermined threshold value (for example, the deviation is 2% or more of the detection interval). This is because in sludge scrapers used for water and sewage, the chain is usually replaced when a deviation of 2% or more occurs.

The second detection unit 723 detects the rotational movement of the main sprocket wheel 300 based on the detection pattern of the second sensor 712. More specifically, the second detection unit 723 is turned ON output from the second sensor 712 that detects the uneven pattern (specifically, the through hole 305) periodically provided on the surface of the main sprocket wheel 300. -Detects the rotational movement of the main sprocket wheel 300 based on the OFF detection pattern. If the second sensor 712 does not turn on for a predetermined time (for example, 120 sec), the second detection unit 723 determines that the endless chain 200 is not rotating and outputs an alert.

Further, the second detection unit 723 detects the rotation speed (rpm) of the main sprocket wheel 300 based on the ON / OFF detection pattern output from the second sensor 712. Specifically, the second detection unit 723 provides the main sprocket wheel 300, which is stored in advance in the storage unit 724, with the number of ONs or OFFs output from the second sensor 712 per unit time (for example, 1 min). The main sprocket wheel 300 rotation speed (rpm) is detected by dividing by the number of through holes 305.

In the storage unit 724, a second connection shaft 240 provided on the side opposite to the base portion 211 from the first through hole 210H (boss) is inserted at intervals of the chain links 210 constituting the endless chain 200 described above. The linear distance L1 (m) to the through holes (bosses) 220H and 230H), the detection interval (msec) of the reflected light (ON) to be output from the first sensor 711 during steady operation, and a predetermined threshold value (for example, The deviation is 2% of the detection interval), the number of through holes 305 provided in the main sprocket wheel 300, and other control programs and identifiers for the control unit 725 to control the drive device (drive means) 500 are stored. There is.

The control unit 725 controls the drive device (drive means) 500 based on the program stored in the storage unit 724, and operates the sludge scraper 1. Further, the control unit 725 controls the drive device (drive means) 500 based on the detection results of the first detection unit 722 and the second detection unit 723. Specifically, the control unit 725 determines that the alert output from the first detection unit 722 and the main sprocket wheel 300 are not rotating when it is determined that the endless chain 200 is not rotating. In this case, the motor 520 of the drive device (drive means) 500 is stopped based on the alert output from the second detection unit 723. Further, when the motor 520 of the driving device (driving means) 500 is stopped, the control unit 725 controls the wireless communication unit 721 so as to transmit the fact to the server 730. After that, the control unit 725 stops the machine and shuts off the power supply.

The server 730 includes a wireless communication unit 731, a storage unit 732, a comparison unit 733, and a control unit 734. The wireless communication unit 731 wirelessly communicates with a plurality of control panels 720, and outputs a detection pattern output from the first sensor 711 and the second sensor 712, an alert output from the first detection unit 722 and the second detection unit 723, and the like. Send and receive included data and control signals. In addition, the wireless communication unit 731 wirelessly communicates with a plurality of user terminals 740 and transmits the monitoring status of the sludge scraper 1. In addition, you may communicate with the user terminal 740 by wire.

The data transmitted from the plurality of control panels 720 is stored in the storage unit 732 in association with each control panel 720 based on the identifiers assigned to the data. Further, the storage unit 732 has a first pattern that serves as a reference for the ON / OFF detection pattern output from the first sensor 711 and a second pattern that serves as a reference for the ON / OFF detection pattern output from the second sensor 712. Two patterns are stored. When the detection patterns of the first sensor 711 and the second sensor 712 are different depending on the sludge scraper 1, the reference first pattern and the second pattern are stored in the storage unit 732 for each identifier of the control panel 720. You may.

The comparison unit 733 compares the detection patterns of the first sensor 711 and the second sensor 712 transmitted from each control panel 720 with the reference first pattern and the second pattern stored in the storage unit 732, respectively. When a predetermined deviation occurs (for example, when the deviation is 2% or more of the detection interval), an alert is output.

The average value of the detection patterns of the first sensor 711 and the second sensor 712 transmitted from each control panel 720 is calculated, and the detection patterns of the first sensor 711 and the second sensor 712 transmitted from each control panel 720 are calculated. When a predetermined deviation occurs (for example, when the deviation is 2% to 5% or more of the detection interval), an alert may be output.

The control unit 734 controls the wireless communication unit 731 so as to transmit the monitoring status to the user terminal 740. For example, the control unit 734 controls the wireless communication unit 731 so as to transmit an alert transmitted from the control panel 720 to the user terminal 740. Further, when the control unit 734 receives from the control panel 720 that the motor 520 of the drive device (drive means) 500 has been stopped, the control unit 734 controls the wireless communication unit 731 so as to transmit the fact to the user terminal 740. Further, the control unit 734 stores the data transmitted from the control panel 720 in the storage unit 732 together with the time (time stamp).

(Operation when the motor of the endless chain is stopped)
FIG. 11 is a flowchart showing the operation of the control panel of the monitoring device of the sludge scraper when the motor is stopped. Hereinafter, the operation of the monitoring device 7 when the motor is stopped by the control panel 720 will be described with reference to FIG. The same configurations as those described with reference to FIGS. 1 to 10 are designated by the same reference numerals, and duplicate description will be omitted.

The first detection unit 722 of the control panel 720 acquires the detection pattern output from the first sensor 711 (step S101). The second detection unit 723 of the control panel 720 acquires the detection pattern output from the second sensor 712 (step S102).

The first detection unit 722 detects whether or not the endless chain 200 is rotating based on the ON / OFF detection pattern output from the first sensor 711 (step S103). When the endless chain 200 is rotating (YES in step S103), the second detection unit 723 indicates whether or not the main sprocket wheel 300 is rotating based on the ON / OFF detection pattern output from the second sensor 712. (Step S104).

When the main sprocket wheel 300 is rotating (YES in step S104), the first detection unit 722 and the second detection unit 723 return to step S101 and continue to monitor the endless chain 200 and the main sprocket wheel 300.

When the endless chain 200 is not rotating (NO in step S103) or the main sprocket wheel 300 is not rotating (NO in step S104), the first detection unit 722 or the second detection unit 723 is set for a predetermined time. It is determined whether or not the first sensor 711 or the second sensor 712 is not turned on during (for example, 120 sec) (step S105).

When the first sensor 711 or the second sensor 712 is turned on within a predetermined time (for example, 120 sec) (NO in step S105), the first detection unit 722 and the second detection unit 723 return to step S101 and the endless chain 200 And continue to monitor the competent sprocket wheel 300.

If the first sensor 711 or the second sensor 712 does not turn on within a predetermined time (for example, 120 sec) (YES in step S105), the first sensor 711 or the second sensor 712 outputs an alert. The control unit 725 stops the motor 520 of the drive device (drive means) 500 based on the alert output from the first sensor 711 or the second sensor 712 (step S106).

Further, the control unit 725 controls the wireless communication unit 721 so as to transmit to the server 730 that the motor 520 of the drive device (drive means) 500 has been stopped. The wireless communication unit 721 transmits to the server 730 that the motor 520 of the drive device (drive means) 500 has been stopped (step S107). After that, the control unit 725 stops the machine and shuts off the power supply.

(Monitoring operation of endless chain over time)
FIG. 12 is a flowchart showing a time-dependent change monitoring operation of the endless chain by the control panel of the monitoring device of the sludge scraper. Hereinafter, the operation of monitoring the change with time of the endless chain by the control panel 720 of the monitoring device 7 will be described with reference to FIG. The same configurations as those described with reference to FIGS. 1 to 11 are designated by the same reference numerals, and duplicate description will be omitted.

The first detection unit 722 of the control panel 720 acquires the detection pattern output from the first sensor 711 (step S201). Next, the first detection unit 722 sets the detection interval (msec) of the reflected light (ON) to be output from the first sensor 711 during steady operation, which is stored in advance in the storage unit 724, and the first sensor 711 actually. It is compared with the detection interval (msec) of the reflected light (ON) output from (step S202).

The first detection unit 722 determines whether or not the deviation of the detection interval is equal to or greater than a predetermined threshold value (for example, the deviation is 2% of the detection interval) (step S203). When the deviation of the detection interval is not equal to or more than a predetermined threshold value (for example, the deviation is 2% of the detection interval) (NO in step S203), the first detection unit 722 returns to step S201 and continues to monitor the endless chain 200.

When the deviation of the detection interval is equal to or greater than a predetermined threshold value (for example, the deviation is 2% of the detection interval) (YES in step S203), the first detection unit 722 outputs an alert to that effect. The control unit 725 controls the wireless communication unit 721 so as to transmit the alert output from the first detection unit 722 to the server 730. The wireless communication unit 721 transmits the above alert to the server 730 (step S204). After that, the first detection unit 722 returns to step S201 and continues to monitor the endless chain 200.

(Monitoring operation of rotation speed of endless chain and main sprocket wheel)
FIG. 13 is a flowchart showing a monitoring operation of the rotation speeds of the endless chain and the main sprocket wheel by the control panel of the monitoring device of the sludge scraper. Hereinafter, the operation of monitoring the rotational speeds of the endless chain 200 and the main sprocket wheel 300 by the control panel 720 of the monitoring device 7 will be described with reference to FIG. The same configurations as those described with reference to FIGS. 1 to 12 are designated by the same reference numerals, and duplicate description will be omitted.

The first detection unit 722 of the control panel 720 acquires the detection pattern output from the first sensor 711 (step S301). The second detection unit 723 of the control panel 720 acquires the detection pattern output from the second sensor 712 (step S302).

The first detection unit 722 is a connecting shaft provided on the side opposite to the base portion 211 from the distance between the chain links 210 constituting the endless chain 200 stored in advance in the storage unit 724 (from the first through hole 210H (boss)). Multiply the linear distance L1 (m) to the second through holes (bosses) 220H and 230H for inserting the 240 and the number of ONs output from the first sensor 711 per unit time (for example, 1 min). Then, the rotation speed (m / min) of the endless chain 200 is detected (step S303).

Further, the second detection unit 723 detects the rotation speed (rpm) of the main sprocket wheel 300 based on the ON / OFF detection pattern output from the second sensor 712. Specifically, the second detection unit 723 provides the main sprocket wheel 300, which is stored in advance in the storage unit 724, with the number of ONs or OFFs output from the second sensor 712 per unit time (for example, 1 min). The main sprocket wheel 300 rotation speed (rpm) is detected by dividing by the number of through holes 305 (step S304).

The control unit 725 controls the wireless communication unit 721 so as to transmit the rotation speeds of the endless chain 200 and the main sprocket wheel 300 detected by the first detection unit 722 and the second detection unit 723 to the server 730. The wireless communication unit 721 transmits the rotational speeds of the endless chain 200 and the main sprocket wheel 300 to the server 730 (step S305). After that, the first detection unit 722 and the second detection unit 723 return to step S301 and continue monitoring the endless chain 200 and the main sprocket wheel 300.

The rotation speeds of the endless chain 200 and the main sprocket wheel 300 during steady operation are stored in the storage unit 724 in advance, and the actual rotation speeds of the endless chain 200 and the main sprocket wheel 300 detected in steps S303 and 204 are stored. , When the rotation speed is compared with the rotation speed stored in the storage unit 724 in advance and the deviation is equal to or more than a predetermined threshold value (for example, the deviation is 2%), an alert is issued from the first detection unit 722 or the second detection unit 723. It may be configured to output. Further, it is preferable that the alert output from the first detection unit 722 or the second detection unit 723 is configured to be transmitted to the server 730.

FIG. 14 is a flowchart showing a monitoring operation by the server of the monitoring device of the sludge scraper. Hereinafter, the monitoring operation by the server 730 of the monitoring device 7 will be described with reference to FIG. The same configurations as those described with reference to FIGS. 1 to 13 are designated by the same reference numerals, and duplicate description will be omitted.

The wireless communication unit 731 of the server 730 wirelessly communicates with a plurality of control panels 720, and outputs a detection pattern output from the first sensor 711 and the second sensor 712 and outputs from the first detection unit 722 and the second detection unit 723. Receive data including alerts and the like (step S401).

The control unit 734 stores the data transmitted from the plurality of control panels 720 in the storage unit 732 in association with each control panel 720 based on the identifiers assigned to the data (step S402).

The comparison unit 733 compares the detection patterns of the first sensor 711 and the second sensor 712 transmitted from each control panel 720 with the reference first pattern and the second pattern stored in the storage unit 732, respectively (). Step S403). The comparison unit 733 outputs an alert when a predetermined deviation occurs (for example, when the deviation is 2% or more of the detection interval) (step S404).

The control unit 734 controls the wireless communication unit 731 so as to transmit the monitoring status to the user terminal 740 (step S405). For example, the control unit 734 controls the wireless communication unit 731 so as to transmit an alert transmitted from the control panel 720 to the user terminal 740. Further, when the control unit 734 receives from the control panel 720 that the motor 520 of the drive device (drive means) 500 has been stopped, the control unit 734 controls the wireless communication unit 731 so as to transmit the fact to the user terminal 740.

As described above, the sludge scraper 1 according to the present embodiment is a pair of endless chains in which a plurality of chain links 210 to which a plurality of flight bodies 100 are fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly. It is provided with 200 and a plurality of wheels 300, 400 arranged in the settling basin A and circulating and driving the stretched endless chain 200 to scrape the sludge settled on the bottom of the basin by the flight body 100. Further, the monitoring device 7 according to the present embodiment has a first detection unit 722 that detects the rotational movement of at least one of the pair of endless chains 200, and a second detection unit that detects the rotational movement of at least one of the plurality of wheels. It includes at least one detection unit of 723.

As described above, in the present embodiment, since the first and second detection units 722 and 723 detect the rotational operation of at least one of the endless chain 200 or the wheel 300, the malfunction of the sludge scraper 1 can be detected more effectively. Can be done.

Further, in the present embodiment, the endless chain 200 is configured by connecting a plurality of chain links 210, and the first detection unit 722 of the monitoring device 7 is based on the detection pattern of the first sensor 711 that detects the chain link 210. Detects the rotational movement of the endless chain 200.

As described above, in the present embodiment, since the rotational operation of the endless chain 200 is detected based on the detection pattern of the first sensor 711 that detects the chain link 210, the rotational operation of the endless chain 200 can be easily detected. Further, since the configuration for detecting the rotational operation of the endless chain 200 can be simplified, it can be manufactured at low cost. Further, since the first sensor 711 is provided at a position away from the endless chain 200, it can be easily attached to an existing sludge scraper.

Further, the monitoring device 7 according to the present embodiment detects the time-dependent change of the endless chain 200 based on the change of the detection pattern of the first sensor 711. As described above, in the present embodiment, since the change with time of the endless chain 200 is detected based on the change of the detection pattern of the first sensor 711, a sign of chain breakage and other defects, for example, chain elongation due to change with time, etc. Can be detected. Moreover, various detections can be performed with one sensor.

Further, the monitoring device 7 according to the present embodiment detects the rotation speed of the endless chain 200 based on the detection pattern of the first sensor 711. As described above, in the present embodiment, since the rotation speed of the endless chain 200 is detected based on the detection pattern of the first sensor 711, the operating state of the endless chain can be detected. Moreover, various detections can be performed with one sensor.

Further, the main sprocket wheel 300 of the sludge scraper 1 according to the present embodiment has a concavo-convex pattern periodically provided on the surface, and the second detection unit 723 of the monitoring device 7 detects the concavo-convex pattern of the wheel 300. The rotational movement of the wheel is detected based on the detection pattern of the second sensor 712.

As described above, according to the present embodiment, since the rotational operation of the wheel 300 is detected based on the detection pattern of the second sensor 712 by the uneven pattern periodically provided on the surface of the wheel 300, the rotational operation of the wheel 300 is simply performed. Can be detected. Further, since the configuration for detecting the rotational movement of the wheel 300 can be simplified, it can be manufactured at low cost. Further, since it is provided at a position away from the wheel 300, it can be easily attached to an existing sludge scraper.

Further, the monitoring device 7 according to the present embodiment detects the rotation speed of the wheel based on the detection pattern of the second sensor 712. As described above, according to the present embodiment, since the rotation speed of the wheel 300 is detected based on the detection pattern of the second sensor 712, the operating state of the wheel 300 can be detected. Moreover, various detections can be performed with one sensor.

Further, the sludge scraper according to the present embodiment is settled with a pair of endless chains 200 in which a plurality of flight bodies 100 are fixed at predetermined intervals and a plurality of chain links 210 are pivotally attached by a connecting shaft and connected endlessly. It is provided with a plurality of wheels 300, 400 arranged in the pond A and circulating and driving the stretched endless chain 200 to scrape the sludge settled on the bottom of the pond by the flight body 100. Then, the monitoring device 7 detects the rotational operation of the endless chain 200 based on the detection result of the first detection unit 722 that detects the rotational operation of at least one of the pair of endless chains 200. As described above, in the present embodiment, since the first detection unit 722 detects the rotational operation of the endless chain 200, it is possible to more effectively detect the malfunction of the sludge scraper 1.

In the present embodiment, as shown in FIG. 1, the endless chain 200 is settled in the sedimentation basin A for the detection of the endless chain 200 and the main sprocket wheel 300 by the first sensor 711 and the second sensor 712, which are optical sensors. It is configured to pass above the water surface WL.

(Other embodiments)
In the above embodiment, as shown in FIG. 1, the endless chain 200 is the water surface WL of the settling basin A for the detection of the endless chain 200 by the first sensor 711 and the detection of the main sprocket wheel 300 by the second sensor 712. It is configured to pass above the top. In the example shown in FIG. 1, the endless chain 200 is not configured to attract the vicinity of the water surface WL of the settling basin A, but the endless chain 200 attracts the vicinity of the water surface WL of the settling basin A, in other words. The upper end side (upper side) of the endless chain 200 may pass near the bottom of the water surface WL of the settling basin A. In this way, the scum floating near the water surface WL of the settling basin A can also be scraped.

Further, in the present embodiment, the first sensor 711 and the second sensor 712 use a reflection type optical detector, but the irradiation unit uses a separate optical sensor in which the irradiation unit and the light receiving unit are separated. The endless chain 200 or the main sprocket wheel 300 may rotate between the light receiving portion and the light receiving portion. Further, an optical distance measuring instrument may be used as the first sensor 711 and the second sensor 712. In this case, since the distance to the endless chain 200 and the main sprocket wheel 300 is measured, it is sufficient that the chain link 210 and the main sprocket wheel 300 to be measured have a certain uneven pattern, and the gap between the chain links 210 is sufficient. The through hole 305 of the 210S and the main sprocket wheel 300 is not always necessary. Further, by reading the uneven pattern of the chain link 210 and the main sprocket wheel 300 to be measured, more detailed monitoring can be performed.

Further, in the present embodiment, the second sensor 712 detects the rotational movement of the main sprocket wheel 300, but may detect the rotational movement of the driven sprocket wheel 400.

Further, if the detection patterns output from the first sensor 711 and the second sensor 712 deviate from the detection patterns during steady operation, an alert may be output. Further, in the above embodiment, the alert and the monitoring status are transmitted from the server 730 to the user terminal 740, but the alert and the monitoring status may be transmitted from the control panel 720 to the user terminal 740.

In the present embodiment, the first sensor 711 and the second sensor 712 are optical sensors, but the operation of the endless chain 200 and the main sprocket wheel 300 is monitored by another method such as an ultrasonic type or a magnet. You may. In the case of the magnet type, magnets may be embedded or attached to the endless chain 200 and the main sprocket wheel 300 at predetermined intervals, and the magnets embedded or attached may be detected by a magnetic sensor. In the present embodiment, since the endless chain 200 and the main sprocket wheel 300 are made of resin, the operation of the endless chain 200 and the main sprocket wheel 300 can be monitored without any problem even if the magnet type is used.

As described above, according to the present invention, it is possible to provide a monitoring device and a monitoring method for a sludge collecting machine that can more effectively detect a malfunction of the sludge collecting machine.

1 Sludge scraper 7 Monitoring device 15 Sludge pit (discharge ditch)
100 Flight body 200 Endless chain 210 Chain link 300 Main sprocket wheel 400 Driven sprocket wheel 500 Drive means 510 Transmission belt 520 Motor 600 Support shaft member 711 First sensor 712 Second sensor 720 Control panel 730 Server 740 User terminal A Sedimentation pond WL Water surface BT bottom

Claims (4)

It is a monitoring device for a sludge scraper that runs a long flight body in a direction perpendicular to its longitudinal direction and scrapes sludge accumulated on the bottom of the sedimentation basin.
The sludge scraper is
A pair of endless chains in which a plurality of chain links fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly, and the endless chains arranged and stretched in the sedimentation pond. It is provided with a plurality of wheels having an uneven pattern provided on the surface of which the sludge settled on the bottom of the pond is scraped by the flight body by circulating driving.
The monitoring device is
Includes a detecting section for detecting a rotational operation of said plurality of wheels,
It said detecting section is,
Monitoring apparatus of the sludge scraped up machine and detecting the rotational speed of the wheel on the basis of the detection pattern of sensor for detecting the uneven pattern of the wheel. It said detecting section is,
Wherein comparing the rotational speed of the wheels is detected based on the detection pattern of the sensor, the rotational speed of the steady operation which has been stored in advance in the storage unit, the deviation of the rotational speed is above a predetermined threshold value The monitoring device for a sludge scraper according to claim 1 , wherein an alert is output in case of a case. It is a monitoring device for a sludge scraper that runs a long flight body in a direction perpendicular to its longitudinal direction and scrapes sludge accumulated on the bottom of the sedimentation basin.
The sludge scraper is
A pair of endless chains in which a plurality of chain links fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly, and the endless chains arranged and stretched in the sedimentation pond. It is provided with a plurality of wheels having an uneven pattern provided on the surface of which the sludge settled on the bottom of the pond is scraped by the flight body by circulating driving.
The monitoring device is
A first detection unit that detects the rotational movement of the pair of endless chains and a second detection unit that detects the rotational movement of the plurality of wheels are provided.
The first detection unit is
The detection pattern of the first sensor that detects the chain link is compared with the detection pattern of the chain link during steady operation that is stored in advance in the storage unit, and the change of the endless chain is detected based on the comparison result. And
The second detection unit
The rotation speed of the wheel is detected based on the detection pattern of the second sensor that detects the uneven pattern of the wheel.
A monitoring device for sludge scrapers, which is characterized by this. It is a monitoring method of a sludge scraper that runs a long flight body in a direction perpendicular to its longitudinal direction and scrapes sludge accumulated on the bottom of a sedimentation basin.
The sludge scraper is
A pair of endless chains in which a plurality of chain links fixed at predetermined intervals are pivotally attached by a connecting shaft and connected endlessly, and the endless chains arranged and stretched in the sedimentation pond. It is provided with a plurality of wheels having an uneven pattern provided on the surface of which the sludge settled on the bottom of the pond is scraped by the flight body by circulating driving.
That detecting section for detecting a rotational operation of said plurality of wheels monitoring device of the sludge scraped up machine equipped senses the rotational speed of the wheel on the basis of the detection pattern of sensor for detecting the uneven pattern of the wheel A characteristic method of monitoring sludge scrapers.

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