JP2008114124A - Sludge scraping apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sludge scraping apparatus which is capable of attaining a high enrichment of sludge at the sludge discharge part of a sludge sedimentation tank. <P>SOLUTION: The sludge scraping apparatus 1 is installed at the sludge sedimentation tank 2 having the sludge discharge part 15 at the bottom equipped with the discharge port 16 of sludge. The sludge scraping apparatus is provided with a scraping rack 10 to conduct a reciprocal movement in the longitudinal direction of the sludge sedimentation tank 2, a sludge scraping member 30 supported by this scraping rack 10 to transfer the deposited sludge at the bottom 2a of the sludge sedimentation tank 2 to the direction of the sludge discharge part 15 by scraping the sludge and a sludge enrichment member 50 to conduct the reciprocal movement within the sludge discharge part 15, which is operatively coupled with the reciprocal movement of the scraping rack 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sludge scraping device installed in a rectangular sludge settling tank.

  In sewage treatment facilities and the like, a sludge settling tank for concentrating and separating sludge contained in the liquid to be treated is used. A circular or rectangular sludge settling tank is adopted according to the scale of the facility and the type of liquid to be treated. In general, circular sludge settling tanks are used for small scale facilities, while rectangular sludge settling tanks are used for medium and large scale facilities.

  The circular sludge settling tank is supposed to be able to process even a liquid to be processed having a relatively low concentration. This is because the amount of liquid to be treated is relatively small, and sludge can be sufficiently concentrated by using a scraping device or the like. On the other hand, it has been pointed out that the sludge sedimentation tank having a rectangular shape may be inferior in the concentration of sludge as compared with a circular one. This is because the amount of the liquid to be processed is large, and depending on the type of the liquid to be processed, it may be difficult to sufficiently settle the sludge.

As a means for increasing the concentration of sludge in a rectangular sludge settling tank, for example, a scraper described in Patent Document 1 is known. The scraping machine described in Patent Document 1 reciprocates a picket fence for separating moisture or air contained in sludge in a tank from sludge using the reciprocating motion of a scraping member.
JP 2002-219499 A

  However, the scraper described in Patent Document 1 cannot take any measures against the sludge in the sludge discharge section (sludge pit) to which the sludge pipe is connected. Therefore, there is a possibility that the concentration property of the sludge in the sludge discharge part may be insufficient. If the concentration of sludge in the sludge discharge section is insufficient, the sludge extraction concentration is lowered, resulting in an increase in the amount of drainage from the sludge settling tank and an increase in the size of the post-processing equipment.

  The present invention has been made to solve such problems, and an object thereof is to provide a sludge scraping device capable of sufficiently concentrating sludge in a sludge discharge section of a sludge settling tank. To do.

  In the rectangular sludge settling tank, the inventors of the present invention have a sufficiently high concentration of discharged sludge even if measures are taken to promote sedimentation of sludge in a region other than the sludge discharge section. The knowledge that it is not a thing was acquired. And it discovered that the concentration property of the sludge discharged | emitted increased by installing the means to promote sedimentation of sludge directly in a sludge discharge part, and completed this invention.

  That is, the sludge scraping device of the present invention is installed in a sludge sedimentation tank having a sludge discharge section provided with a sludge discharge port at the bottom, and is reciprocated in the longitudinal direction of the sludge sedimentation tank. Sludge scraping member that is supported by the gantry, supported by this cradle, scrapes the sludge accumulated at the bottom of the sludge settling tank and moves in the direction of the sludge discharge section, and sludge discharge in conjunction with the reciprocating motion of the cradle A sludge concentration member that reciprocates within the section.

  In the sludge scraping device having the above-described configuration, the sludge concentrating member disposed in the sludge discharge section reciprocates using the reciprocating motion of the scraping platform. When the sludge concentration member reciprocates in the sludge discharge part, the sludge contained in the liquid to be treated is retreated to both sides of the track of the member by the sludge concentration member. That is, when the sludge concentrating member passes through the liquid to be treated, water is formed in the liquid to be treated for a short time. Then, the upward movement of water in the liquid to be treated and the sedimentation of sludge below are promoted. In addition, by gently stirring the liquid to be treated by the sludge concentration member, it is possible to separate bubbles from the sludge and promote sedimentation of the sludge.

  In the rectangular sludge settling tank, the volume of the sludge discharge part is insufficient with respect to the amount of the liquid to be processed, and the residence time in the sludge discharge part cannot be sufficiently secured in many cases. As a result, it is considered that the concentration of sludge in the sludge discharge section becomes insufficient. By using the sludge scraping device of the present invention for the rectangular sludge settling tank, the concentration of sludge in the sludge discharge section is enhanced, and the sufficiently concentrated sludge can be discharged from the discharge port.

  The sludge scraping device according to the present invention includes a reciprocating transmission member having one end connected to the sludge concentrating member and the other end extending toward the scraping base, and the other end of the reciprocating transmission member. The side is preferably supported by a scraper. With this configuration, the reciprocating motion of the scraping table can be transmitted to the sludge concentrating member disposed in the sludge discharging section, and the sludge concentrating member can be reciprocated in conjunction with the scratching table.

  Moreover, it is preferable that the other end side of the said reciprocation transmission member is slidably supported with respect to the scraper in the longitudinal direction of the sludge settling tank. In this case, even if the width of the sludge discharge section (longitudinal direction of the sludge settling tank) is narrower than the width of the reciprocating movement of the scraper, the reciprocating action of the sludge concentrating member is adjusted to the width of the sludge discharging section. The width can be easily adjusted.

  The sludge concentration member includes a plurality of rod-shaped members, and a connecting member that is disposed between the rod-shaped members and connects the plurality of rod-shaped members in series and connects adjacent rod-shaped members in a swingable manner. Is preferred. When such a configuration is adopted, the sludge concentrating member can be deformed in accordance with the shape of the side wall of the sludge discharging section, compared with the case where the sludge concentrating member is composed of one member, and the liquid to be treated and sludge in the sludge discharging section A concentration member can be made to contact more fully.

  According to the sludge scraping device of the present invention, the sludge can be sufficiently concentrated in the sludge discharge section of the sludge settling tank.

  Hereinafter, a preferred embodiment of a sludge scraping apparatus according to the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
1st Embodiment of the sludge scraping apparatus which concerns on this invention is described, referring FIGS. FIG. 1 is a schematic front view showing a sludge scraping apparatus according to this embodiment, and FIG. 2 is a schematic side view showing the sludge scraping apparatus according to this embodiment. FIG. 3 is an enlarged view of the vicinity of the attachment part of the flight (sludge scraping member). 4 (a) to 4 (d) are partial schematic diagrams illustrating each state of the sludge concentration member. 5 to 8 are partial schematic diagrams for explaining each state of the flight.

  As shown in FIG. 1, the sludge scraping apparatus 1 of the present embodiment is disposed, for example, in a sedimentation basin or the like of a sewage treatment plant, and sludge accumulated in the bottom 2a of a tank (sludge sedimentation tank) 2 is sludge pit ( Sludge toward the sludge discharge unit) 15. The tank 2 has a substantially rectangular cross section cut vertically along the longitudinal direction, and the liquid to be processed is supplied from the left side of FIG. 1 (the liquid to be processed is supplied in the longitudinal direction of the tank 2). ).

  The sludge pit 15 is provided at the bottom of the tank 2 to be treated supplied. The water depth of the portion where the sludge pit 15 is provided is deeper than other regions. The sludge scraped is collected in the sludge pit 15. The sludge pit 15 is composed of a rectangular bottom portion 15a and four side walls standing up so as to surround the four sides of the bottom portion 15a. The four side walls are all inclined surfaces, and as the depth of the sludge pit 15 becomes deeper, the distance between the side walls at the opposing positions becomes narrower. A discharge port 16 for discharging concentrated sludge is provided at a position facing the bottom 15 a of the sludge pit 15. The concentrated sludge extracted from the discharge port 16 is transferred to the sludge treatment facility through the discharge line L16.

  The sludge scraping device 1 is supported by a scraping base 10 that reciprocates in the longitudinal direction in the tank 2 and swingable on the lower side of the scraping base 10, and scrapes the sludge accumulated on the bottom 2 a of the tank 2. The flying flight (sludge scraping member) 30, the driving device 40 for reciprocating the scraper base 10 in parallel with the bottom 2 a of the tank 2, and the sludge pit 15 in conjunction with the reciprocating motion of the scraper base 10. A sludge concentrating member 50 that reciprocates inside and a tubular member (reciprocating motion transmitting member) 60a that transmits the reciprocating motion of the scraper 10 to the sludge concentrating member 50 are provided.

  As shown in FIGS. 1 to 3, the structure and operation of the cradle 10 that reciprocates in the longitudinal direction of the tank 2, the guide unit 20 that supports the cradle 10 and guides the reciprocation, and the flight 30 are as follows. This is almost the same as that described in Japanese Unexamined Patent Publication No. 2003-181209. Specifically, the stroking table 10 includes a plurality of main roller support shafts 12 having main rollers 11 at both ends constituting the wheels of the stroking table 10, and two parallel driving direction members 13 extending in the longitudinal direction. As shown in FIG. 3, the main roller support shaft 12 and the drive direction member 13 are configured in a ladder shape by intersecting at right angles with each other via coupling plates 12a and 13a. As shown in FIG. 1 and FIG. 3, the main roller 11 is a guide unit 20 having two upper and lower rails each having a substantially U-shaped cross section installed on a pair of side walls 2 d parallel to the longitudinal direction of the tank 2. It is accommodated and supported in the upper main guide rail 21 and its travel is guided. As shown in FIG. 1, the motor 41 constituting the driving device 40 rotates, so that the driving force is transmitted via the chain 42. It is transmitted to the cradle 10 and the cradle 10 reciprocates.

  In the sludge scraping apparatus 1, accumulation of sludge accumulated on the bottom 2 a of the tank 2 in the sludge pit 15 and concentration treatment of sludge in the sludge pit 15 are simultaneously performed by using the reciprocating operation of the scraper 10. First, the sludge concentration process in the sludge pit 15 will be described. Here, the case where the width of the reciprocating motion of the sludge concentration member 50 in the sludge pit 15 is narrower than the width of the reciprocating motion of the scraper 10 will be described. For example, the plurality of flights 30 shown in FIG. 1 are generally arranged at intervals of about 3 m. In this case, the width of the reciprocating motion of the scraper 10 is typically set to about 3.7 m. The width of the sludge pit of the rectangular sludge concentrating tank is typically about 2 to 4 m, and is generally narrower than the width of the reciprocating operation of the scraper 10.

  In the sludge concentration process in the sludge pit 15, the sludge concentration member 50 disposed in the sludge pit 15 and a member for connecting the sludge concentration member 50 (rod-shaped member connection portion 62) are fixed to one end. This is performed by a sludge concentrating device composed of a tubular member (reciprocating motion transmitting member) 60a having the other end extending in the direction of the scraper 10. Here, the tubular member 60a is slidably supported with respect to the scraper base 10. Specifically, the tubular member 60 a is inserted into and supported by a tubular member 60 b that is integrally fixed along the driving direction member 13 on the upper side of the scraper 10. That is, the tubular member 60a and the tubular member 60b constitute a double tube 60 that can be expanded and contracted in the reciprocating direction of the scraper 10.

  The sludge concentrating member 50 includes a plurality of rod-like members 54 extending in the direction of the bottom portion 15a and a plurality of rod-like members 55 connected to the rod-like member 54 and depending on the bottom portion 15a. As shown in FIGS. 1 and 2, the rod-shaped member 54 is fixed integrally with the rod-shaped member connecting portion 62 provided at the distal end portion of the tubular member 60 a at substantially equal intervals. Further, the rod-like member 54 and the rod-like member 55 that are connected in series by a connecting member (for example, a short chain) 57 are swingable with respect to each other. In addition, the cross-sectional shape of the rod-shaped members 54 and 55 is not specifically limited, For example, a circular, elliptical, rectangular, L-shaped thing can be used. From the viewpoint of efficiently separating sludge and water in the liquid to be treated, the cross-sectional shapes of the rod-shaped members 54 and 55 are preferably rectangular or L-shaped.

  As shown in FIGS. 1 and 2, the rod-shaped member connecting portion 62 to which the plurality of rod-shaped members 54 are fixed is a member that extends over the entire width of the tank 2 in the short direction. At both ends of the rod-like member connecting portion 62, the tip of a tubular member 60a forming the inner tube of the double tube 60 is fixed.

  FIG. 4A shows a state when the operation of the scraping base 10 is switched from a forward movement (movement in the direction of arrow A shown in the figure) to a backward movement (movement in the direction of arrow B shown in the figure). It is the partial schematic diagram shown. The position of the scraper 10 at this time is the forward limit position, and the double pipe 60 is in the most contracted state. In this state, the rod-shaped member connecting portion 62 is in contact with the side wall 2b of the tank 2 on the side of the liquid inlet to be processed.

  FIG. 4B shows a state in which the tip 54s of the rod-like member 54 comes into contact with the side wall 15d of the sludge pit 15 (the side wall at the position opposite to the side wall 2b) after the scraping base 10 starts to move backward. It is a fragmentary sectional view shown. Even in this state, the scraping base 10 continues to move backward, but the movement of the sludge concentration member 50 and the tubular member 60a is hindered by the side wall 2d and does not follow the backward movement of the stirring base 10 any more. .

  FIG. 4C is a partial schematic diagram showing a state when the operation of the scraping base 10 is switched from the backward movement to the forward movement. The position of the scraper base 10 at this time is the retreat limit position, and the double pipe 60 is in the most extended state. Until this time, the state in which the tip 54s of the rod-like member 54 is in contact with the side wall 15d of the sludge pit 15 is maintained.

  FIG. 4D is a partial cross-sectional view showing a state in which the rod-like member connecting portion 62 comes into contact with the side wall 2b after the scraping platform 10 starts to move forward. Even in this state, the scraper 10 continues to move forward, but the sludge concentrating member 50 and the tubular member 60a are prevented from moving by the side wall 2b, and no further movement of the scraper 10 is caused to return. Absent. After that, when the stroking table 10 continues to move and the position of the stroking table 10 reaches the forward limit position, the state shown in FIG.

  Such a series of operations is repeated, and the sludge in the sludge pit 15 is concentrated. That is, when the sludge concentrating member 50 passes through the liquid to be treated in the sludge pit 15, water is formed in the liquid to be treated for a short time. Then, the upward movement of water in the liquid to be treated and the sedimentation of sludge below are promoted. In addition to this, by gently stirring the liquid to be treated by the sludge concentrating member 50, the bubbles adhering to the sludge are separated from the sludge, and the sedimentation of the sludge is promoted.

  Next, the sludge scraping process deposited on the bottom 2a of the tank 2 will be described with reference to FIG. 3 and FIGS. When the scraping base 10 moves forward, as shown in FIGS. 3 and 5, it is connected to the main roller support shaft 12 of the scraping base 10 via a flight arm 31 that can swing around this axis. The flight 30 rakes the sludge accumulated on the bottom 2a of the tank 2 toward the sludge pit 15 at the first swinging position where the flight 30 hangs down. When approaching the forward limit position of the cradle 10, the secondary roller 32 that protrudes from the flight arm 31 toward the side wall 2 d is swingably provided on the lower surface of the secondary guide rail 22 installed at the lower stage of the guide unit 20. At the same time, the lower guide flap 33 projecting so as to form an inclined surface of approximately 30 degrees below the sub guide rail 22 is pushed away and moved forward against the spring force as shown in FIG.

  When the sub-roller 32 passes under the opening 34 formed on the lower surface of the sub-guide rail 22 and adjacent in the forward movement direction (the position of the scraping base 10 at this time is the forward limit position), the motor 41 rotates in the reverse direction. (Counterclockwise in the figure), the scraping base 10 starts to move backward, and the sub roller 32 rises along the inclined surface of the lower guide flap 33 and enters the sub guide rail 22 through the opening 34. At this time, the flight arm 31 is rotated in the clockwise direction in the drawing to be inclined, and as shown in FIG. 7, the flight 30 is separated from the bottom portion 2a to remove the sludge that has been scraped in the reverse direction (recovery). The scraping base 10 moves backward without scraping back in the movement direction). When the sub roller 32 approaches the opening 34 adjacent in the backward movement direction, the upper guide flap 35 is swingably installed on the lower surface of the sub guide rail 22 and extends upward against the spring force to open the opening. Pass over 34. When the sub-roller 32 passes over the opening 34 (the position of the stroking base 10 at this time is the retreat limit position), the motor 41 further rotates in the reverse direction and rotates clockwise in the figure to As shown in FIG. 8, the secondary roller 32 descends along the inclined surface of the lower guide flap 33 and is guided out of the secondary guide rail 22. Such a series of operations is repeated, and the sludge accumulated on the bottom 2 a is carried to the sludge pit 15.

  As shown in FIGS. 3, 5, and 7, the coupling plate 12 a fixed to the main roller support shaft 12 has an arm that prevents further rotation counterclockwise from the suspended state of the flight arm 31. A stopper 36 is fixed. Further, as shown in FIGS. 5 to 8, the guide flaps 33 and 35 have springs 37 for smoothly returning from the position rotated by the sub roller 32 to the original position (position shown in FIG. 5). 38 are provided. A weight may be provided in place of the springs 37 and 38.

  The flight 30 is swung by such a series of operations of the cradle 10 and the auxiliary roller 32, and the sludge scraped to the sludge pit 15 side by a predetermined section (distance between the openings 34, 34) At the position on the sludge pit 15 side from the guide flap 33, it remains in a state of being temporarily accumulated, and then, after returning to the sludge pit 15 side, the flight 30 next to the sludge pit 15 side further returns to the sludge pit 15 side. The section is scraped, and the sludge is fed forward by one flight 30 every predetermined section, and is scraped to the sludge pit 15 and discharged.

  As described above, in the present embodiment, the scraper base 10 and the sludge concentration member 50 are connected via the double pipe 60, and the tubular member 60 a that forms the inner pipe of the double pipe 60 is an outer part. A tubular member 60b forming a tube is slidably supported with respect to the cradle base 10. Therefore, even if the width of the sludge pit 15 (moving direction of the scraping base) is narrower than the width of the reciprocating operation of the scraping base 10 as in this embodiment, the sludge is adjusted to the width of the sludge pit 15. The width of the reciprocating motion of the concentration member can be easily adjusted.

  In this embodiment, the rod-shaped member 54 is integrally fixed to the rod-shaped member connecting portion 62. Therefore, for example, as shown in FIG. 4B, the reciprocating operation of the sludge concentrating member 50 is restricted by the tip 54 s of the rod-shaped member 54 coming into contact with the side wall 15 d. By adopting such a configuration, the sludge concentrating member 50 can be reciprocated in the sludge pit 15 without separately installing a control means for expanding and contracting the double pipe 60 according to the width of the sludge pit 15.

  Furthermore, in this embodiment, the rod-shaped member 55 is connected to the rod-shaped member 54 via the connecting member 57 in series. When the sludge concentrating member 50 has a plurality of rod-like members connected in series and these rod-like members are swingable with respect to each other, the sludge concentrating member 50 can be bent at the connecting portion. Therefore, the sludge concentration member 50 can be reciprocated until the distal end portion 54s of the rod-shaped member 54 abuts against the side wall after the distal end portion of the rod-shaped member 55 abuts against the side wall of the sludge pit 15. Therefore, compared with the case where the sludge concentration member is made of one member, the reciprocating motion of the sludge concentration member can be sufficiently widened, and the sludge concentration member and the liquid to be treated in the sludge concentration section can be contacted more efficiently. Can be made.

  In addition, in this embodiment, although the structure which concerns on a double pipe was illustrated as a means which makes a reciprocating motion transmission member (tubular member 60a) slidable with respect to a scratching stand, a sludge concentration member, a scratching stand, As long as the relative distance between them is variable, the present invention is not limited to this. For example, instead of the tubular member 60b, a guide rail extending in the longitudinal direction of the tank 2 is provided on the upper side of the scraping platform 10, and the tip side is supported by a guide rail via a roller instead of the tubular member 60a. A reciprocating motion transmitting member that travels along the guide rail may be employed.

(Second embodiment)
A second embodiment of the sludge scraping apparatus according to the present invention will be described with reference to FIGS. FIG. 9 is a schematic front view of the sludge scraping device according to the present embodiment. FIG. 10 is a schematic side view of the sludge scraping device according to the present embodiment. FIGS. 11A to 11C are partial schematic diagrams for explaining the states of the sludge concentration member.

  The sludge scraping apparatus 1a shown in FIGS. 9 to 11 is different from the sludge scraping apparatus 1 according to the first embodiment in the following points, and the other configurations are the same. That is, (i) the rod-shaped member 54 is swingably connected to the rod-shaped member connecting portion 62; (ii) a simple rod-shaped member 61 is employed instead of the double tube 60.

  The sludge scraping process deposited on the bottom 2a of the tank 2 is the same as that in the first embodiment, and therefore the description thereof will be omitted. Here, only the sludge concentration process in the sludge pit 15 will be described.

  In the present embodiment, the rod-shaped member 54 is swingably connected to the rod-shaped member connecting portion 62. The rod-shaped member connection portion 62 and the rod-shaped member 54 are connected by a connection member (for example, a short chain) 53.

  As shown in FIGS. 9 and 10, the sludge concentrating member 50 is fixed to the scraping table 10 via a rod-shaped member (reciprocating motion transmitting means) 61. Therefore, in the sludge scraping apparatus 1a, the width of the reciprocating motion of the scraper 10 and the width of the reciprocating motion of the sludge concentrating member 50 are the same. According to the sludge scraping apparatus 1a, it is possible to concentrate sludge even when the width of the reciprocating motion of the sludge concentrating member 50 in the sludge pit 15 is narrower than the width of the reciprocating motion of the scraping platform 10. Is described below.

  FIG. 11A shows a state when the operation of the scraping platform 10 is switched from a forward movement (movement in the direction of arrow A shown in the figure) to a backward movement (movement in the direction of arrow B shown in the figure). It is the partial schematic diagram shown. The position of the scraper 10 at this time is the forward limit position. In this state, the rod-like member 55 is in contact with the side wall 15b of the sludge pit 15 on the liquid inlet side.

  FIG. 11B is a partial cross-sectional view showing a state in which the rod-like member 55 abuts along the side wall 15 d of the sludge pit 15 after starting the return movement of the scraping base 10. Even in this state, the scraper 10 continues to move back, and the sludge concentration member 50 follows the return of the scraper 10.

  FIG. 11C is a partial schematic diagram illustrating a state when the operation of the scraping base 10 is switched from the backward movement to the forward movement. The position of the scraper base 10 at this time is the retreat limit position. In this state, the rod-shaped member 54 runs up to the bottom 2a side of the sludge pit 15.

  Thereafter, when the scraper base 10 starts to move forward, the sludge concentrating member 50 passes through the state shown in FIG. 11 (b) and then the state shown in FIG. 11 (a) again when the scraper base 10 reaches the forward limit position. It becomes. Such a series of operations is repeated, and the sludge in the sludge pit 15 is concentrated.

  In the present embodiment, a plurality of bar-shaped members 54 are fixed to the bar-shaped member connecting portion 62 so as to be swingable. Therefore, as shown in FIG. 11 (c), when the rod-like member 54 rides on the bottom portion 2b, even if the sludge pit 15 is narrower than the reciprocating motion of the scraping base 10, Concentration treatment can be performed simultaneously.

  As mentioned above, although this invention was concretely demonstrated based on 1st embodiment and 2nd embodiment, this invention is not limited to the said embodiment. For example, in the above embodiment, the sludge scraping member is exemplified by a sludge concentrating device constituted by a flight. However, if it is a scraping device having a reciprocating mechanism, other than the sludge concentrating member and the reciprocating motion transmitting member. A conventionally known configuration may be applied.

  In addition, the sludge scraping device according to the above embodiment does not have a function of removing the scum that has floated on the liquid surface of the liquid to be treated stored in the tank 2, but the reciprocating operation of the scraper 10 is performed. You may attach the structure which can use and remove a scum.

  Furthermore, in the said embodiment, although the case where the width | variety of the reciprocating motion of the sludge concentration member 50 in the sludge pit 15 was narrower than the width | variety of the reciprocating motion of the scraping stand 10 was demonstrated, the sludge scraping apparatus of this invention is Even when the width of the reciprocating motion of the sludge concentrating member 50 in the sludge pit 15 is wider than the width of the reciprocating motion of the scraper 10, it can be suitably used. In this case, since the reciprocating motion transmission member does not necessarily have to be slidable with respect to the scraping base, for example, the rod-shaped member 61 of the second embodiment may be adopted as the reciprocating motion transmitting member.

  Further, in the first and second embodiments, the rod-shaped member 55 is connected in series to the rod-shaped member 54. However, instead of the rod-shaped member 55, a predetermined length corresponding to the distance to the bottom or side wall of the sludge pit 15 is used. A chain having a length may be used. Depending on the shape of the sludge pit 15, the sludge in which the rod-like member extends to the bottom of the sludge pit 15 or the vicinity of the side wall without connecting the rod-like members in series or connecting the chain. You may employ | adopt a concentration member.

It is a front schematic diagram which shows the sludge scraping apparatus which concerns on 1st embodiment of this invention. It is a side surface schematic diagram which shows the sludge scraping apparatus which concerns on 1st embodiment of this invention. FIG. 2 is an enlarged view of the vicinity of a flight attachment portion in FIG. 1. (A)-(d) is a partial schematic diagram explaining each state of a sludge concentration member. It is a partial schematic diagram which shows the state of the flight at the time of forward movement. It is a partial schematic diagram which shows the state in which a sub-roller pushes down a lower guide flap at the time of a forward motion. It is a partial schematic diagram which shows the state of the flight at the time of a backward movement. It is a partial schematic diagram which shows the state which a sub-roller descends along the inclined surface of a lower side guide flap at the time of a forward motion. It is a front schematic diagram which shows the sludge scraping apparatus which concerns on 2nd embodiment of this invention. It is a side surface schematic diagram which shows the sludge scraping apparatus which concerns on 2nd embodiment of this invention. (A)-(c) is a partial schematic diagram explaining each state of a sludge concentration member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a ... Sludge scraping apparatus, 2 ... Tank (sludge sedimentation tank), 10 ... Scratch rack, 15 ... Sludge pit, 16 ... Discharge port, 30 ... Flight (sludge scraping member), 50 ... Sludge concentration member, 62 ... Rod-shaped member connecting portion (reciprocating motion transmitting member), 57 ... Connecting member, 60a ... Tubular member (reciprocating motion transmitting member), 61 ... Rod-shaped member (reciprocating motion transmitting member).

Claims (4)

A sludge scraping device installed in a sludge settling tank equipped with a sludge discharge part provided with a sludge discharge port at the bottom,
A scraper that reciprocates in the longitudinal direction of the sludge settling tank;
A sludge scraping member that is supported by the scraping base and moves the sludge accumulated at the bottom of the sludge settling tank in the direction of the sludge discharge unit;
A sludge concentration member that reciprocates in the sludge discharge section in conjunction with reciprocation of the scraper;
A sludge scraping device comprising:   One end is connected to the sludge concentrating member, and the other end side includes a reciprocating transmission member extending toward the scraping base, and the other end side of the sludge concentrating member is supported by the scraping base. The sludge scraping apparatus according to claim 1, wherein:   The sludge scraping according to claim 2, wherein the other end side of the reciprocating transmission member is slidably supported in the longitudinal direction of the sludge settling tank with respect to the scraping stand. apparatus.   The sludge concentrating member includes a plurality of rod-shaped members, and a connecting member that is disposed between the rod-shaped members and connects the plurality of rod-shaped members in series and connects the adjacent rod-shaped members to each other in a swingable manner. The sludge scraping device according to any one of claims 1 to 3, wherein the sludge scraping device is provided.

Images