JP2015164730A - Sludge raker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge raker capable of applying a tension properly to an endless rotor.SOLUTION: A sludge raker includes an endless rotor 2 which has a sludge scraper attached through a clearance in the rotational direction and is rotatably wound over a drive rotor rotating around a transverse axis and a follower rotor, and a pressure member for applying a tension to the endless rotor 2. On the inner circumferential side of the endless rotor 2, there is disposed a guide member 40 having a recess 41a, in which the endless rotor 2 is fitted, rockably integrally with the pressure member.

Description

  In the present invention, an endless rotating body to which a sludge scraping tool is attached at an interval in a rotating direction is wound around a driving rotating body and a driven rotating body rotating around a horizontal axis so as to be freely rotatable. And a sludge scraper provided with a pressing member that applies tension to the endless rotating body by pressing a non-winding portion of the endless rotating body with respect to the rotating body from the outer peripheral side of the rotating path. .

The sludge scraper is installed, for example, in a sedimentation basin in a sewage treatment facility and drives an endless rotating body such as an endless chain wound around a driving rotating body and a driven rotating body that rotate around a horizontal axis. By moving, the sludge scraping tool attached to the endless rotating body can scrape the sludge settled in the sedimentation basin into the discharge groove provided in the bottom of the sedimentation basin.
In such a sludge scraper, since the endless rotating body is elongated due to creep phenomenon or wear during long-term operation, the endless rotating body is moderated regardless of the extension of the endless rotating body. Tension can be applied to the endless rotating body by pressing the non-wound portion of the endless rotating body around the rotating body from the outer peripheral side to the inner peripheral side of the rotating path so that a sufficient tension can be applied. A pressing member is provided (see, for example, Patent Document 1).

JP 2009-244102 A

  In this kind of sludge scraping machine, it is necessary to appropriately apply tension to the endless rotating body, and the present invention aims to provide a sludge scraping machine that can appropriately apply tension to the endless rotating body. To do.

  In the sludge scraper according to the present invention, the endless rotating body to which the sludge scraping tool is attached at intervals in the rotating direction rotates between the driving rotating body and the driven rotating body rotating around the horizontal axis. There is provided a pressing member that is movably wound and applies a tension to the endless rotating body by pressing a non-winding portion of the endless rotating body with respect to the rotating body from the outer peripheral side of the rotating path. In the sludge scraper, a guide member having a recess into which the endless rotating body enters the inner peripheral side of the endless rotating body is provided to be swingable integrally with the pressing member.

  According to the said structure, the guide member provided with the recessed part into which an endless rotation body enters from the downward direction below a press member is provided so that rocking | fluctuation integrally with a press member is possible. For this reason, when the pressing member is about to ride on the endless rotating body, the pressing member is lifted up in conjunction with the guide member. As a result, it is possible to prevent the pressing member from riding on the endless rotating body and the pressing member from being detached from the endless rotating body. Therefore, the endless rotating body can be reliably pressed by the pressing member.

  The said structure WHEREIN: It is suitable when the said guide member is comprised so that position change is possible.

  By configuring the guide member such that the position can be changed as in this configuration, the position of the guide member can be appropriately set.

  The said structure WHEREIN: It is suitable when the said guide member is provided under the said press member and the said horizontal axis core side.

  In the above configuration, the swing member provided with the pressing member is supported so as to be swingable around a swing axis substantially parallel to the horizontal axis, and is provided on a part of the press member or on the press member. It is preferable that the member enters into a part of the endless rotating body and is configured to prevent positional displacement between the pressing member and the endless rotating body.

  According to the above configuration, when the pressing member presses the endless rotating body, a part of the pressing member or a member provided on the pressing member enters a part of the endless rotating body, and the pressing member and the endless rotation Prevent misalignment with the body. For this reason, it is possible to prevent the pressing member from riding on the endless rotating body and detaching from the endless rotating body pressing member. Therefore, the endless rotating body can be reliably pressed by the pressing member.

  The said structure WHEREIN: It is suitable when the said press member is a ring body and the convex-shaped part which enters into a part of said endless rotation body is formed in the surrounding side surface of the said ring body.

  When the pressing member is a ring body as in this configuration, by forming a convex portion on the peripheral side surface of the ring body, the convex portion enters a part of the endless rotating body, and the pressing member and the convex member To prevent misalignment. For this reason, it is possible to prevent the pressing member from riding on the endless rotating body and the pressing member from coming out of the endless rotating body. Therefore, the endless rotating body can be reliably pressed by the pressing member.

  The said structure WHEREIN: It is suitable when the predetermined area | region by the side of the at least front-end | tip part of the said convex-shaped part is formed so that the peripheral side is wide.

  As the convex portion is formed wider toward the peripheral side surface as in this configuration, the side surface of the convex portion is formed in a slope shape so as to spread from the distal end side to the proximal end side. Thus, when the pressing member is about to ride on the endless rotating body by forming the side surface of the convex portion into a slope shape, that is, when the vicinity of the tip of the convex portion contacts the endless rotating body, A force acts in a direction to return the convex portion of the pressing member to the center in the width direction of the endless rotating body. Therefore, the position shift of the endless rotating body can be prevented more reliably, and the endless rotating body can be reliably pressed by the pressing member.

  In the above configuration, the endless rotating body includes a notch chain provided with a pair of link plates, and the link plates adjacent to each other in the rotating direction of the notch chain. The sludge scraping tool is attached to the outer peripheral side of the notch chain, the pair of link plates are provided with bulging portions, It is preferable that a part of the pressing member or a member provided on the pressing member enters between the bulging portions of the link plate.

  Like this structure, a pair of link plate is provided with the bulging part which bulges upwards, and the member provided in the part of the said pressing member or the said pressing member enters between the bulging parts of a pair of link plate Thereby, the bulging part for reinforcement of a notch chain can be combined with the space which the member provided in a part of press member or the press member enters.

It is a whole longitudinal cross-sectional view of a sewage storage tank. It is a figure which shows a notch chain and a drive rotary body. It is a top view which shows a pressing member and a guide member. It is a side view which shows a press member and a guide member. It is a front view which shows a pressing member. It is a front view which shows a guide member. It is a side view which shows the guide member which concerns on another embodiment. It is a front view which shows the guide member which concerns on another embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 shows a longitudinal section of a sedimentation basin A in a sewage treatment facility, in which a sludge scraper B and a scum skimmer C according to the present invention are installed.

  As shown in FIG. 1, the sludge scraper B includes a pair of left and right endless chains 2 as endless rotating bodies to which the sludge scraping tool 1 is attached at intervals in the rotational direction. The drive sprocket 3 is rotatably wound around a drive sprocket 3 as a drive rotator rotating around X and first to third driven sprockets 4 (4a, 4b, 4c) as driven rotators. A driving device 5 for driving and rotating the motor is provided.

  The drive sprocket 3 is supported near the water surface WL at the longitudinal end of the settling basin A, and the first driven sprocket 4a is supported near the water surface WL at the approximate center in the longitudinal direction of the settling basin A. The driven sprockets 4b and 4c are supported near the bottom surface 6 at both longitudinal ends of the sedimentation basin A.

  As shown in FIG. 2, the drive sprocket 3 is provided with two disk members 9 concentrically in parallel to each other on the outer peripheral side of a boss through which the rotary shaft member 7 is inserted. A plurality of cylindrical pin members engaging pins 10 are fixed across the member 9 in a posture along the rotation axis X at equal intervals in the circumferential direction, and the first to third driven sprockets 4a and 4b. 4c, as shown in FIG. 3, a circumferential groove 11 into which the endless chain 2 is inserted is provided on the outer peripheral portion thereof. The first driven sprocket 4a is provided in the vicinity of the swing member 19 (that is, in the vicinity of the pressing member 17), and the second driven sprocket 4b is provided at the end opposite to the sludge pit 15, and the third driven sprocket 4 4c is provided at the end on the sludge pit 15 side.

  As shown in FIG. 2, the endless chain 2 is configured such that the link plates 12 adjacent to each other in the rotational direction can swing relative to each other with a connecting pin 16 with the plate surface along the circumferential direction of the drive sprocket 3. It is composed of a notch chain 2 that is connected. A notch 14 for engaging the engagement pin 10 is formed at the side edge 13 of each link plate 12 on the side of the drive sprocket 3. Moreover, the sludge scraping tool 1 is attached to the outer peripheral side of the notch chain (that is, the lower side when the notch chain 2 is located on the bottom surface 6 side) via an attachment or the like, for example. The notch chain 2 is made of, for example, a synthetic resin.

  The pair of link plates 12 of the notch chain 2 includes bulging portions that bulge upward, and a recess 30a formed between the bulging portions 30 of the pair of link plates 12 (that is, a part of the notch chain 2) will be described later. The convex part provided in the pressing member 17 to enter enters. Like this structure, between the bulging parts 30 of the link plate 12 functions as a recessed part 30a, the convex part 17a of the pressing member 17 enters the recessed part 30a on the upper side away from the sludge scraping tool 1, and is notched. The chain 2 is pressed by the pressing member 17. In this way, the bulging portion 30 for reinforcing the notch chain can also be used as the concave portion 30a into which the convex portion provided in the pressing member 17 enters.

  The notch chain 2 is inserted between the two disk members 9 in the drive sprocket 3 and the first to third driven sprockets 4a, 4b, and 4c, and the engagement pin 10 is engaged with the notch 14. The drive sprocket 3 is driven and rotated by the drive device 5 to drive and rotate the pair of left and right notch chains 2 so that each of the sludge scrapers 1 is driven by the drive sprocket 3, the first driven sprocket 4a, the second driven sprocket 4b, Circulating and moving in the order of the third driven sprocket 4c, the scum floating near the water surface WL of the sedimentation basin A is scraped to the scum skimmer C side by moving from the drive sprocket 3 side toward the first driven sprocket 4a side. The sludge settled near the bottom surface 6 of the sedimentation basin A due to the movement from the second driven sprocket 4b side to the third driven sprocket 4c side. Is provided at the bottom of the sedimentation tank A are configured to be able to scrape the sludge pit 15.

  As shown in FIG. 1, a pressing member 17 that applies tension to the endless chain 2 is provided in a downwardly movable manner. As shown in FIGS. 3, 4, and 5, the pressing member 17 is composed of, for example, a resin ring as a rotating member that is rotatable by the rotational movement of the notch chain 2. A groove portion is formed over the entire circumference in the center portion in the width direction of the outer peripheral surface of the pressing member 17, and a ring member made of an elastic body is provided in the groove portion, and the ring is formed from the outer peripheral surface of the pressing member 17. A convex portion 17a is formed protruding outward in the radial direction. In a state where the ring member is attached to the pressing member 17, at least a predetermined region of the distal end portion is formed wider from the distal end portion toward the proximal end portion. The convex portion 17a enters the concave portion 30a of the notch chain 2 from above. In addition, the convex part 17a is not restricted to the above-mentioned form, The thing integrally formed in the outer peripheral surface of the press member 17 may be sufficient. Moreover, the convex part 17a does not necessarily need to be provided over the perimeter of the press member 17, and may be provided only in a part. Moreover, you may comprise so that pressing member 17 itself may enter into the recessed part 30a, without providing the convex-shaped part 17a.

  In the present embodiment, as shown in FIG. 5, the portion from the distal end portion of the convex portion 17 a to a predetermined region is set so that the width increases toward the proximal end side. By forming the convex portion 17a wider toward the peripheral side surface side, the convex portion 17a is formed in a slope shape so that the side surface of the convex portion 17a extends from the distal end side to the proximal end side. Thus, when the pressing member 17 tries to ride on the notch chain 2 by forming the side surface of the convex portion 17a in a slope shape, that is, the vicinity of the tip of the convex portion 17a is the concave portion 30a of the notch chain. When pressing, the convex portion 17a of the pressing member 17 is urged in a direction to return to the center side in the width direction of the concave portion 30a of the notch chain 2. Therefore, the position shift of the notch chain 2 can be prevented. In addition, protrusions are provided on both sides of the convex portion 17a of the pressing member 17 so as to sandwich the convex portion 17a, and the convex portion 17a enters the concave portion 30a (between the pair of bulging portions 30), and each bulge You may comprise so that protrusion may be located in the outward of the protrusion part 30. FIG.

  As shown in FIGS. 3, 4 and 5, the pressing member 17 is supported by the swing member 19 so as to be rotatable around a rotation axis Y substantially parallel to the horizontal axis X of the first driven sprocket 4a. The swinging member 19 is self-oscillating around the swinging axis Z substantially parallel to the horizontal axis X of the first driven sprocket 4a on the support shaft member 20 that rotatably supports the first driven sprocket 4a. It is supported freely.

  The swing member 19 includes a pressing member 17, a pair of left and right swing arms 21, and a connection frame 22 that connects the pair of swing arms 21 to each other. A base end side of each swing arm 21 is attached to a cylindrical body 7 that is rotatably fitted to the support shaft member 20 of the first driven sprocket 4a, and the axis of the cylindrical body 7 is used as a swing axis Z. The weight 8 is detachably attached to the tip of the swing arm 21. The horizontal axis X and the swing axis Z do not necessarily coincide with each other. Each of the pair of pressing members 17 is supported by the connecting frame 22 so as to be rotatable around the rotation axis Y.

  As shown in FIG. 6, a guide member 40 having a recess 41a into which the notch chain 2 enters from above is provided below the pressing member 17 and on the first driven sprocket 4a side so as to be swingable integrally with the pressing member 17. ing. The guide member 40 is configured as a ring as a rotating body, and a recess 41 a is formed between the flanges 41 by providing a pair of flanges 41 on the ring. In the present embodiment, the recess 41a is formed so that the width becomes wider toward the upper side. Note that the concave portion 41a does not necessarily have to be formed so as to be wider toward the top, and may have the same width regardless of the vertical position.

  As shown in FIG. 4, the guide member 40 is supported by a support member 42 that extends downward from the swing arm 21. The swing arm 21 has a plurality of holes 21 a along the longitudinal direction of the swing arm 21, and the support member 42 has a plurality of holes 42 a along the height direction. The guide member 40 is supported by the swing arm 21 through the support member 42 by inserting the bolt 21b through any of the hole portions 21a and any of the hole portions 42a of the support member.

  Here, since the plurality of holes 21a and 42a are provided in the swing arm 21 and the support member 42, the movement of the notch chain 2 of the guide member 40 can be performed by changing the holes 21a and 42a through which the bolts 21b are inserted. The front-rear position and the vertical position in the direction can be changed. In addition, although it is preferable that the part between the 1st driven sprocket 4a of the notch chain 2 and the press member 17 becomes linear shape, since the position of the guide member 40 can be changed as mentioned above, The position of the guide member 40 can be appropriately changed so that the portion between the first driven sprocket 4a and the pressing member 17 is linear. Note that the number of guide members 40 may be one, but in the case of two, the notch chain 2 can be straightened, so that the wheel removal is more effectively prevented.

  In this embodiment, the guide member 40 is in a normal state, that is, in a state where the convex portion 17a of the pressing member 17 enters the concave portion 30a of the notch chain 2, the flange portion 41 of the guide member 40 does not touch the notch chain 2. The position is set as follows. On the other hand, when the convex portion 17a of the pressing member 17 is going to ride on the notch chain 2, the guide member 40 is lifted in conjunction with the pressing member 17, so that the notch chain 2 moves downward and the guide member 40 The part 41 is contacted. At this time, since the concave portion 41a formed by the flange portion 41 is set to have a larger width as it extends upward, the notch chain 2 comes into contact with the flange portion 41 so that the notch chain 2 is on the upper side and the center side of the recess portion 41a. Be energized by. That is, the pressing member 17 is biased toward the side where the riding on the notch chain 2 is eliminated. Even when the recess 41a is formed to have the same width, the notch chain 2 is urged toward the center of the recess 41a when the notch chain 2 abuts against the flange 41. It is biased to the side where the ride on the notch chain 2 is eliminated.

  In addition, a guide member is not restricted to said form, For example, what is shown in FIG.7 and FIG.8 may be used. The guide member 50 forms a recess 51a into which the notch chain 2 is inserted by supporting a pair of plate members 51 extending along the traveling direction of the notch chain 2 on the swing arm 22 by support members 52a and 52b. Further, for example, a channel material or the like may be used. Also in this case, the position of the guide member 50 can be changed as in the above embodiment.

  Moreover, the form of the above-mentioned sedimentation basin A is an example, and this sludge scraping machine B is applicable also to the sedimentation basin etc. of another form, and can be applied also to another sludge processing apparatus.

  The present invention can be used as a sludge scraper in a sludge treatment apparatus such as a sedimentation basin.

1 Sludge scraping tool 2 Endless rotating body (notch chain)
17 Pressing member 19 Oscillating member 12 Link plate 40, 50 Guide member

Claims (7)

An endless rotating body to which a sludge scraping tool is attached at an interval in the rotating direction is wound around a driving rotating body and a driven rotating body rotating around a horizontal axis so as to be freely rotatable. A sludge scraper provided with a pressing member that applies tension to the endless rotating body by pressing the non-wound portion of the moving body against the rotating body from the outer peripheral side of the rotating path,
A sludge scraping machine in which a guide member having a recess into which the endless rotating body enters the inner peripheral side of the endless rotating body is provided so as to be swingable integrally with the pressing member.   The sludge scraper according to claim 1, wherein the guide member is configured to be changeable in position.   The sludge scraper according to claim 1 or 2, wherein the guide member is provided below the pressing member and on the side of the horizontal axis. A swing member provided with the pressing member is supported so as to be swingable around a swing axis substantially parallel to the horizontal axis,
2. A part of the pressing member or a member provided on the pressing member enters into a part of the endless rotating body, and is configured to prevent displacement between the pressing member and the endless rotating body. The sludge scraper according to any one of -3.   The sludge scraper according to claim 4, wherein the pressing member is a ring body, and a convex portion that enters a part of the endless rotating body is formed on a peripheral side surface of the ring body.   The sludge scraper according to claim 5, wherein a predetermined area on at least the tip side of the convex part is formed wider toward the peripheral side. The endless rotating body has a notch chain provided with a pair of link plates, each of the link plates adjacent to each other in the rotating direction of the notch chain, and the plate surface of the link plate along the circumferential direction of the drive rotating body. It is configured to be relatively swingable at
The sludge scraper is attached to the outer peripheral side of the notch chain,
5. The sludge scraper according to claim 4, wherein the pair of link plates includes a bulging portion, and a part of the pressing member or a member provided on the pressing member enters between the bulging portions of the pair of link plates. Machine.

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