JP6465225B1 - Sludge scraping machine - Google Patents

Abstract

Provided is a sludge scraping machine capable of effectively suppressing the drop-off of a flight from a support rail when the flight is lifted from the support rail. A sludge scraper 11 is provided with a plurality of sprockets 15, an endless chain 16 wound around the plurality of sprockets 15, and attached to the chain 16, and the chain 16 revolves as the sprocket 15 rotates. The flight 24 that moves on the outer circumference of the circular orbit of the chain 16 and scrapes the sludge, the first shoe 28 attached to the flight 24, and the upper support rail that supports the flight 24 via the first shoe 28 26, an upper engagement rail 30 that extends in the same direction as the upper support rail 26, and a first shoe 28 that is engaged with the upper engagement rail 30 when the flight 24 is lifted from the upper support rail 26. And an engagement portion 31 that suppresses the drop-off of the flight 24 from the upper support rail 26. [Selection] Figure 2

Description

  The present invention relates to a sludge scraping machine used for, for example, sewage treatment.

  Conventionally, as this kind of sludge scraper, for example, the one described in Patent Document 1 is known. Such a sludge scraper is equipped with an endless chain with a plurality of rectangular plate-like flights spaced from the water surface to the bottom of the sludge sedimentation basin. The solids are scraped by each flight by traveling around.

  A pair of upper rails are disposed on the water surface, and a pair of lower rails are disposed on the pond bottom. A first shoe is provided at a position corresponding to the pair of upper rails in the flight, and a second shoe is provided at a position corresponding to the pair of lower rails in the flight. When the flight travels on the water surface, the first shoe slides on the upper rail, and when the flight travels on the pond bottom, the second shoe slides on the lower rail.

  At both ends of the flight, convex portions projecting in the flight longitudinal direction from both ends of the flight are provided. A pair of guide rails are provided on the outer side of the flight surface in the longitudinal direction of the water surface in a state of being fixed to the sludge settling basin side. In this case, the upper surface of the convex portion and the lower surface of the guide rail face each other in the vertical direction. When a flight that runs on the water surface rises from the upper rail due to a large water surface swaying (sloshing) that occurs particularly in the water surface due to a large earthquake, etc., the upper rail of the flight is caused by the convex portion coming into contact with the guide rail. I try to prevent falling off.

JP 2015-29979 A

  By the way, in the sludge scraper as described above, when the flight is lifted from the upper rail due to sloshing, the convex part comes into contact with the guide rail at a position away from the upper rail, so that the flight is prevented from falling off the upper rail. In doing so, there is room for improvement.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a sludge scraping machine capable of effectively suppressing the drop-off of the flight from the support rail when the flight is lifted from the support rail.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The sludge scraper that solves the above problems is a plurality of sprockets, an endless chain wound around the plurality of sprockets, and attached to the chain, and the chain moves around as the sprocket rotates. In the same direction as the support rail, a flight that moves the outer peripheral side of the circular orbit of the chain and scrapes the sludge, a shoe attached to the flight, a support rail that supports the flight via the shoe, An engaging rail that extends, and an engaging portion that is provided on the shoe and suppresses dropping of the flight from the support rail by engaging the engagement rail when the flight is lifted from the support rail. Is provided.

  According to this configuration, since the engagement portion is provided on the shoe, when the flight is lifted from the support rail, the engagement portion engages with the engagement rail at a position close to the support rail. For this reason, since the lift of the flight is effectively suppressed, the drop-off of the flight from the support rail can be effectively suppressed.

In the sludge scraper, it is preferable that the engaging portion is detachably attached to the shoe.
According to this configuration, since the engaging portion and the shoe are separate, the attachment position of the engaging portion with respect to the shoe can be freely changed.

In the sludge scraper, it is preferable that the engaging portion is formed integrally with the shoe.
According to this structure, compared with the case where an engaging part is comprised with a shoe separately, a number of parts can be reduced.

In the sludge scraper, the engagement portion is preferably a recess formed in the shoe.
According to this configuration, when the flight is lifted from the support rail by inserting the engagement rail into the recess, the recess engages with the engagement rail at a position closer to the support rail. For this reason, since the lift of the flight is more effectively suppressed, the drop-off of the flight from the support rail can be further effectively suppressed.

  The sludge scraper that solves the above problems is a plurality of sprockets, an endless chain wound around the plurality of sprockets, and attached to the chain, and the chain moves around as the sprocket rotates. In the same direction as the support rail, a flight that moves the outer peripheral side of the circular orbit of the chain and scrapes the sludge, a shoe attached to the flight, a support rail that supports the flight via the shoe, An engaging rail that extends, and is attached to the flight so that the flight is sandwiched between the shoes in the flight movement direction, and engages with the engaging rail when the flight is lifted from the support rail. And an engaging portion that suppresses dropping of the flight from the support rail.

  According to this configuration, since the engaging portion is attached to the flight so that the flight is sandwiched between the shoes in the flight movement direction, when the flight is lifted from the support rail, the engagement portion is engaged at a position close to the support rail. The joint engages with the engagement rail. For this reason, since the flight of the flight from the support rail is effectively suppressed, the drop-off of the flight from the support rail can be effectively suppressed.

  According to the present invention, when a flight is lifted from the support rail, it is possible to effectively prevent the flight from dropping from the support rail.

The model perspective view which shows a state when the sludge scraping machine of one Embodiment is installed in a sedimentation basin. The schematic diagram which shows the upper part of FIG. The schematic diagram which shows the lower part of FIG. The schematic diagram which shows the principal part of the sludge scraping machine of the example of a change. (A) is a side view of the 1st shoe | hook of FIG. 4, (b) is a front view of (a). (A) is a side view of a modified example of the first shoe of FIG. 4, and (b) is a front view of (a). The schematic diagram which shows the principal part of the sludge scraper of another example of a change. (A) is a side view of the first shoe of FIG. 7, and (b) is a front view of (a). Furthermore, the schematic cross section which shows the principal part of the sludge scraping machine of another modification.

Hereinafter, an embodiment of a sludge scraping machine used in sewage treatment will be described with reference to the drawings.
As shown in FIG. 1, the sludge scraper 11 is installed in a settling basin 12 having a substantially rectangular parallelepiped shape. A sludge pit 14 that is recessed below the bottom surface 13 of the sedimentation basin 12 is orthogonal to both the first direction X and the vertical direction Z of the sedimentation basin 12 at one end side in the first direction X that is the longitudinal direction of the sedimentation basin 12. Are provided so as to extend in the second direction Y. Sludge contained in the sewage stored in the sedimentation basin 12 is accumulated in the sludge pit 14. That is, the sludge scraping machine 11 scrapes the sludge in the sedimentation basin 12 toward the sludge pit 14.

  The sludge scraper 11 has a symmetrical structure when viewed from the first direction X, and includes a plurality of sprockets 15 and an endless chain 16 wound around the plurality of sprockets 15. Each sprocket 15 is disposed in the sedimentation basin 12 so as to form a pair in the second direction Y. Among these sprockets 15, a pair of sprockets 15 disposed at the upper part of the end portion on the sludge pit 14 side in the first direction X is a driving sprocket 17 to which a rotational driving force is applied by a motor (not shown). The pair of drive sprockets 17 are supported so as to be integrally rotatable by a drive shaft 19 installed between both inner side surfaces 18 of the settling basin 12 in the second direction Y.

  A first driven sprocket 20, which is a kind of sprocket 15, is located above the settling basin 12 and at a position slightly opposite to the side where the drive sprocket 17 is located from the center position in the first direction X, They are arranged in a pair in the second direction Y. A second driven sprocket 21, which is a kind of sprocket 15, forms a pair in the second direction Y at the lower end of the sedimentation basin 12 and at the end opposite to the sludge pit 14 side in the first direction X. Is arranged.

  A third driven sprocket 22, which is a kind of sprocket 15, is arranged at the lower part of the sedimentation basin 12 and at the end on the sludge pit 14 side in the first direction X so as to make a pair in the second direction Y. Yes. The first to third driven sprockets 20 to 22 are respectively supported by a driven shaft 23 provided between both inner side surfaces 18 of the sedimentation basin 12 so as to be integrally rotatable.

  One driving sprocket 17 and three driven sprockets 20 to 22 arranged along one inner side surface 18 in the second direction Y in the settling basin 12 and one driving sprocket arranged along the other inner side surface 18. An endless chain 16 is wound around the 17 and the three driven sprockets 20 to 22. Therefore, a pair of chains 16 are arranged in the sedimentation basin 12 so as to face each other in the second direction Y.

  In this case, the chain 16 wound around one drive sprocket 17 and three driven sprockets 20 to 22 has a substantially trapezoidal shape when viewed in the second direction Y. When the pair of drive sprockets 17 are rotationally driven, the rotational driving force is transmitted to each pair of driven sprockets 20 to 22 via the pair of chains 16 so that each pair of driven sprockets 20 to 22 is driven and rotated. To do.

  A plurality of rectangular plate-like flights 24 extending in the second direction Y are provided in the pair of chains 16 so as to bridge between the pair of chains 16. These flights 24 are arranged so as to be equidistant in the direction in which the chain 16 extends outside the ring formed by the endless chain 16, and are attached to a mounting plate 25 integrally formed with the chain 16 (see FIG. 2). ) With bolts and nuts (not shown). Accordingly, the pair of chains 16 on which the flights 24 are bridged move around in synchronism with each other as the pair of drive sprockets 17 and the pairs of driven sprockets 20 to 22 rotate.

  Then, when each pair of chains 16 moves around, the flights 24 move on the outer periphery of the pair of chains 16 so that the sludge in the sedimentation basin 12 is scraped by the flights 24. In the sludge scraper 11 according to the present embodiment, a pair of chains 16 move in a circle in the direction indicated by the white arrow in FIG. That is, each flight 24 attached to the pair of chains 16 moves from the second driven sprocket 21 side toward the third driven sprocket 22 side along the bottom surface 13 of the settling basin 12, so that the bottom surface 13 of the settling basin 12 is obtained. The sludge that has settled on the surface is scraped toward the sludge pit 14 by each flight 24.

  As shown in FIGS. 1 and 2, between the drive sprocket 17 and the first driven sprocket 20, a pair of upper support rails 26 as an example of a support rail that supports the flight 24 from below is provided in the first direction X. It is arrange | positioned so that it may extend. The pair of upper support rails 26 are disposed outside the pair of chains 16 in the second direction Y. The pair of upper support rails 26 are supported by a plurality of upper rail support members 27 provided in pairs with both inner side surfaces 18 in the second direction Y in the settling tank 12. The plurality of pairs of upper rail support members 27 are arranged so as to be arranged at equal intervals in the first direction X.

  A first shoe 28 as an example of a shoe is attached to a portion of the flight 24 that contacts the pair of upper support rails 26 by bolts and nuts (not shown). The pair of first shoes 28 are arranged on the lower side of the flight 24 like the mounting plate 25 of the chain 16 between the drive sprocket 17 and the first driven sprocket 20. Therefore, the flight 24 is slidably supported by the pair of upper support rails 26 via the pair of first shoes 28 in the region between the drive sprocket 17 and the first driven sprocket 20.

  The first shoe 28 is provided with a pair of stoppers 29 for preventing the first shoe 28 from being detached from the upper support rail 26 in the second direction Y. The pair of stoppers 29 are arranged on both sides of the first shoe 28 with the upper support rail 26 sandwiched in the second direction Y. A pair of upper engagement rails as an example of an engagement rail extending in the same direction as the pair of upper support rails 26 on the outer side in the second direction Y of the pair of upper support rails 26 on each pair of upper rail support members 27. 30 is arranged.

  An engaging portion 31 that is L-shaped when viewed from the first direction X is integrally formed at a position outside the second direction Y in the first shoe 28. The outer end surface of the engagement portion 31 in the second direction Y is flush with the outer end surface of the flight 24 in the second direction Y. A gap is formed between the tip 31a of the engaging portion 31 and the flight 24, and a flat plate-like protruding portion 30a protruding from the upper engaging rail 30 is inserted into the gap.

  In this case, the protruding portion 30a of the upper engaging rail 30 is disposed above the distal end portion 31a of the engaging portion 31, and the distal end portion 31a and a part of the protruding portion 30a face each other in the vertical direction Z. Therefore, when the flight 24 is lifted from the upper support rail 26, the distal end portion 31 a of the engagement portion 31 engages with the protruding portion 30 a of the upper engagement rail 30 so that the flight 24 is dropped from the upper support rail 26. It comes to suppress.

  As shown in FIGS. 1 and 3, between the second driven sprocket 21 and the third driven sprocket 22, there is a pair of lower support rails 32 as an example of support rails that support the flight 24 from below. They are arranged so as to extend in one direction X. When the flight 24 is between the second driven sprocket 21 and the third driven sprocket 22, the vertical direction is reversed from that between the driving sprocket 17 and the first driven sprocket 20. The pair of lower support rails 32 are disposed on the bottom surface 13 of the settling basin 12 on the inner side in the second direction Y than the pair of chains 16.

  A second shoe 33 is attached to a portion of the flight 24 that contacts the pair of lower support rails 32 by bolts and nuts (not shown). The pair of second shoes 33 is disposed on the lower side of the flight 24 that is opposite to the attachment plate 25 side of the chain 16 between the second driven sprocket 21 and the third driven sprocket 22. Accordingly, the flight 24 is slidably supported by the pair of lower support rails 32 via the pair of second shoes 33 in the region between the second driven sprocket 21 and the third driven sprocket 22.

  The second shoe 33 is provided with a pair of stoppers 34 for preventing the second shoe 33 from being detached from the lower support rail 32 in the second direction Y. The pair of stoppers 34 are disposed on both sides of the second shoe 33 with the lower support rail 32 sandwiched in the second direction Y. A tapered surface 35 is formed between the inner side surface 18 and the bottom surface 13 at the bottom of the sedimentation basin 12 so as to narrow the width in the second direction Y of the sedimentation basin 12.

  A plurality of lower rail support members 36 are provided at equal positions in the first direction X at positions corresponding to the regions between the second driven sprocket 21 and the third driven sprocket 22 on both tapered surfaces 35. It has been. The plurality of lower rail support members 36 on both tapered surfaces 35 support a pair of lower engagement rails 37 as an example of an engagement rail extending in the same direction as the lower support rail 32. That is, the pair of lower engagement rails 37 are supported by the plurality of lower rail support members 36 in the vicinity of each of the tapered surfaces 35.

  The lower engagement rail 37 has an L shape when viewed in the first direction X, and a part of the lower engagement rail 37 is located above the distal end portion 31 a of the engagement portion 31 of the first shoe 28. That is, a part of the lower engagement rail 37 and the tip end portion 31 a of the engagement portion 31 are opposed in the vertical direction Z. Therefore, when the flight 24 is lifted from the lower support rail 32, the distal end portion 31 a of the engagement portion 31 prevents the flight 24 from dropping from the lower support rail 32 by engaging with the lower engagement rail 37. It is supposed to be.

Next, the operation of the sludge scraper 11 will be described.
When the pair of drive sprockets 17 are rotationally driven, the pair of chains 16 move together with the plurality of flights 24 along with the rotation of each pair of driven sprockets 20 to 22. Then, each flight 24 moves in the process of sequentially moving from the second driven sprocket 21 side to the third driven sprocket 22 side in the region between the second driven sprocket 21 and the third driven sprocket 22. The sludge accumulated on top is raked into the sludge pit 14.

  At this time, when the water surface S (see FIG. 2) of the sedimentation basin 12 greatly swings up and down due to a large earthquake or the like, each flight 24 that slides on the pair of upper support rails 26 becomes a pair of upper support rails 26. Try to lift from above. Then, the front end portions 31 a of the engaging portions 31 of the pair of first shoes 28 of each flight 24 engage with the protruding portions 30 a of the pair of upper engaging rails 30. That is, the distal end portion 31 a of the engaging portion 31 of the first shoe 28 is engaged with the protruding portion 30 a of the upper engaging rail 30 at a position close to the upper support rail 26. Thereby, since the lift of each flight 24 from the pair of upper support rails 26 is effectively suppressed, the drop of each flight 24 from the pair of upper support rails 26 is suppressed.

  In addition, when the water surface S of the sedimentation basin 12 swings up and down greatly due to a large earthquake or the like, the water swings up and down at the bottom of the sedimentation basin 12. Therefore, each flight 24 that slides on the pair of lower support rails 32 tends to float from the pair of lower support rails 32. Then, the front end portions 31 a of the engagement portions 31 of the pair of first shoes 28 of each flight 24 are engaged with the pair of lower engagement rails 37. Thereby, since the lift of each flight 24 from the pair of lower support rails 32 is suppressed, the drop of each flight 24 from the pair of lower support rails 32 is suppressed.

According to the embodiment detailed above, the following effects are exhibited.
(1) The sludge scraper 11 is provided on the first shoe 28, and when each flight 24 is lifted from the upper support rail 26 and the lower support rail 32, the upper engagement rail 30 and the lower engagement rail 37 are provided. Is engaged with the upper support rail 26 and the lower support rail 32 so as to prevent the flights 24 from dropping off. According to this configuration, since the engaging portion 31 is provided on the first shoe 28, when each flight 24 is lifted from the upper support rail 26 and the lower support rail 32, the upper support rail 26 and the lower support are supported. The engaging portion 31 engages with the upper engaging rail 30 and the lower engaging rail 37 at a position close to the rail 32. For this reason, since the lift of each flight 24 from the upper support rail 26 and the lower support rail 32 can be effectively suppressed, the drop of each flight 24 from the upper support rail 26 and the lower support rail 32 is effectively suppressed. it can.

  (2) In the sludge scraper 11, the engaging portion 31 is formed integrally with the first shoe 28. According to this structure, compared with the case where the engaging part 31 is comprised separately from the 1st shoe 28, a number of parts can be reduced.

(Example of change)
In addition, you may change the said embodiment as follows.
As shown in FIG. 4, the first shoe 28 is changed to the first shoe 40, the engaging portion 31 is changed to the engaging portion 41 formed of a recess formed in the first shoe 40, and the upper engaging rail 30. May be changed to an upper engagement rail 42 having an L shape when viewed from the first direction X, and a plurality of support members 43 for supporting the upper engagement rail 42 may be provided on the inner surface 18 of the settling basin 12. . In this case, as shown in FIGS. 5A and 5B, the first shoe 40 has an L-shaped plate shape when viewed in the second direction Y, and is a plate-like sliding portion extending horizontally. 44 and a plate-like attachment portion 45 erected on the end portion on the sliding portion 44. An engaging portion 41 (concave portion) formed by cutting out a part of the mounting portion 45 is formed at a position outside the second direction Y in the mounting portion 45 and adjacent to the sliding portion 44. According to this configuration, by inserting a part of the upper engagement rail 42 into the engagement portion 41, when the flight 24 is lifted from the upper support rail 26, the engagement is performed at a position closer to the upper support rail 26. The joint portion 41 engages with the upper engagement rail 42. For this reason, since the lift of the flight 24 is further effectively suppressed, the drop-off of the flight 24 from the upper support rail 26 can be further effectively suppressed.

  As shown in FIGS. 6A and 6B, in the first shoe 40 shown in FIGS. 5A and 5B, the engaging portion 41 of the mounting portion 45 is replaced with the sliding portion 44. A plate-like convex portion 46 may be formed at a position facing each other. The convex portion 46 is adjacent to the engaging portion 41.

  As shown in FIG. 7, the first shoe 28 is changed to the first shoe 50, and the engaging portion 31 is changed to the engaging portion 51 formed of a rod-like convex portion formed on the first shoe 50, The combined rail 30 may be changed to an upper engagement rail 52 having an L shape when viewed from the first direction X. In this case, as shown in FIGS. 8A and 8B, the first shoe 50 has an L-shaped plate shape when viewed from the second direction Y, and is a plate-like sliding portion extending horizontally. 53 and a plate-like mounting portion 54 erected on the end portion on the sliding portion 53. An engaging portion 51 that protrudes outward in the second direction Y is formed at a position adjacent to the sliding portion 53 outside the second direction Y in the attachment portion 54. As shown in FIG. 7, the distal end portion of the engaging portion 51 in the second direction Y is located outside the end portion of the flight 24 in the second direction Y.

  As shown in FIG. 9, the first shoe 28 and the engaging portion 31 are configured separately, and the flight 24 is connected to the first shoe 28 and the engaging portion 31 in the first direction X that is the moving direction of the flight 24. The first shoe 28 and the engaging portion 31 may be attached to the flight 24 with bolts 60 and nuts 61 so as to be sandwiched between them. In this case, the first shoe 28, the engaging portion 31, and the flight 24 are fastened by the common bolt 60 and nut 61. According to this configuration, since the engaging portion 31 is attached to the flight 24 so that the flight 24 is sandwiched between the first shoe 28 in the moving direction of the flight 24, the flight 24 is lifted from the upper support rail 26. In this case, the engagement portion 31 engages with the upper engagement rail 30 at a position close to the upper support rail 26. For this reason, since the lift of the flight 24 from the upper support rail 26 is effectively suppressed, the drop-off of the flight 24 from the upper support rail 26 can be effectively suppressed.

  The engagement portion 31 may be detachably attached to the first shoe 28 with a bolt or the like. According to this configuration, since the engaging portion 31 and the first shoe 28 are separate, the attachment position of the engaging portion 31 with respect to the first shoe 28 can be freely changed, and the engaging portion 31 and the first shoe 28 can be freely changed. Only one of them can be exchanged.

  DESCRIPTION OF SYMBOLS 11 ... Sludge scraper, 15 ... Sprocket, 16 ... Chain, 24 ... Flight, 26 ... Upper support rail as an example of a support rail, 28, 40, 50 ... First shoe as an example of a shoe, 30, 42, 52... Upper engagement rail as an example of engagement rail, 31, 41, 51... Engagement portion, 32... Lower support rail as an example of support rail, 37. rail.

Claims (1)

Multiple sprockets,
An endless chain wound around the plurality of sprockets;
A flight attached to the chain and moving the outer periphery side of the circular orbit of the chain and scraping sludge when the chain rotates around with the rotation of the sprocket;
A shoe attached to the flight;
A support rail that supports the flight via the shoe;
An engagement rail extending in the same direction as the support rail;
The shoe is configured separately from the shoe, and is attached to the flight with the shoe by a common bolt and nut so that the flight is sandwiched between the shoe in the flight movement direction. A sludge scraping machine comprising: an engaging portion that suppresses dropping of the flight from the support rail by engaging with the engaging rail when a flight is lifted.