JP6357690B2 - Method for producing scraper body of sludge scraping device - Google Patents

Description

The present invention relates to a method for producing a scraper body of a sludge scraping device .

  In treatment ponds such as the first and final sedimentation ponds, a number of flights are deployed in a chain that circulates, and when the flights pass through the pond bottom, the pond bottom sludge is raked into the sludge pit. However, recently, a machine equipped with a sludge scraper that moves up and down instead of this has been laid on the bottom of the pond because it is structurally complicated and expensive in terms of cost and has problems with durability. The pond bottom running type sludge scraping device, which is driven to move forward and backward along the guide rails, is currently in use. This sludge scraping device is advantageous in that it is structurally simple and inexpensive.

  JP2003-1015

By the way, there exists a technique of patent document 1 as one type of such a sludge scraping apparatus. In this case, a guide rail is laid in the center of the bottom wall of the sedimentation basin, and a long machine body is allowed to move forward and backward through wheels on the guide rail. The airframe is equipped with three sludge scrapers that are largely separated in the front-rear direction so as to be switched up and down. This sludge scraping device has a slightly longer advance / retreat stroke than the sludge scraper's front-rear interval, and when sludge is scraped by the most sludge scraper, the sludge is moved forward from the return position of the front sludge scraper. Further, the sludge is scraped forward from the return position of the most advanced sludge scraper, and finally the sludge is dropped into the sludge pit by the most advanced sludge scraper. Such a sludge scraping device has a feature that sludge can be scraped efficiently with a short stroke.
However, since the machine body is long and the number of sludge scrapers may be large, such as three before and after, if all of these components are made of stainless steel, there is a risk that they will be heavy and insufficient in strength.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide various components, particularly a scraper body of a sludge scraping device, as a lightweight and strong one at a low cost .

In order to achieve the above-mentioned object, the present invention according to claim 1 corresponds to the side walls facing each other in the left-right width direction, the end walls facing each other in the longitudinal direction that are before and after orthogonal thereto, and one end in the longitudinal direction. A guide rail is installed at the intermediate position in the left-right width direction on the bottom wall in the settling basin formed in a rectangular plane with the bottom wall having sludge pits, with the longitudinal direction of the bottom wall facing the longitudinal direction. On the guide rail, a single long and slender body in the longitudinal direction is provided so as to move forward and backward in the longitudinal direction by rolling a wheel arranged on the guide rail on the front and rear positions. The airframe is provided with a pair of left and right upper and lower bearings via each of the cradles provided at a plurality of positions on the front and rear, and each bearing has a single round pipe shape that is rotatable at a fixed length. Scraper shaft and its When the sludge scraper consisting of the plate-shaped scraper body provided on the left and right sides of the scraper shaft is rotated around the scraper shaft and descends, the sludge is scraped toward the sludge pit while rotating around the scraper shaft. The sludge scraper body in the sludge scraping device provided so as to be able to switch up and down so as to pass through and return to the top of the sludge when rising. In addition, it is assumed that a horizontally long rectangular plate having a long lateral length exceeding the lateral width of the sedimentation basin when it is mounted on the left and right portions of the scraper shaft is integrally molded with a reinforced resin as a prototype. The sludge scraping device is produced by cutting the length to fit within the pond width of the sedimentation pond, and to match the outer shape to the pond bottom shape. It has become.

As described above, the present invention is a plane formed by the side walls that oppose each other in the left-right width direction, the end walls that oppose each other in the longitudinal direction, and the bottom wall that has a sludge pit corresponding to one end in the longitudinal direction. A guide rail is installed at a middle position in the left-right width direction on the bottom wall of the sedimentation basin formed in a rectangular shape in a state in which the longitudinal direction of the bottom wall is directed to the longitudinal direction of the bottom wall. A long and slender single body is provided to move forward and backward in the longitudinal direction by rolling wheels arranged on the front and rear positions on a guide rail. A pair of left and right top and bottom type bearings are provided through each of the platforms, and each bearing is separated from each other by a single round pipe-shaped scraper shaft that is rotatable at a fixed length and on the left and right of the scraper shaft. Shi When the sludge scraper consisting of the plate-shaped scraper body provided rotates around the scraper shaft and descends, the sludge is squeezed in the direction of the sludge pit, while the sludge scraper rotates around the scraper shaft and rises above the sludge. A method of producing a scraper body of the sludge scraper in a sludge scraping device provided so as to be able to switch up and down so as to pass through and return, wherein each of the left and right scraper bodies is provided on left and right portions of the scraper shaft. When installed, it is assumed to be the one that is integrally molded with reinforced resin as a horizontally long rectangular plate with a long lateral length that exceeds the lateral width of the sedimentation basin, and then the installation target of the sludge scraping device It is designed to be cut to a length that fits within the pond width of the settling pond and cut to match the outer shape to the pond bottom shape. The scraper body sludge raking device can be provided at low cost as strong strength lightweight.

  The top view of the sludge scraping apparatus which shows one Embodiment of this invention corresponding to FIG.   II-II sectional view taken on the line of FIG.   III-III sectional view taken on the line of FIG.   The side view which shows other embodiment about a guide rail.   The perspective view which shows one side of the guide rail of FIG.   The perspective view which shows embodiment about an airframe.   The expanded sectional view which shows other embodiment about an airframe corresponding to the VII-VII line of FIG.   The right view of FIG.   The front view which shows the example which used the sludge scraper as the reinforced resin.   The perspective view of the sludge scraper of FIG.   The perspective view which shows other embodiment of a sludge scraper.   The sectional side view which shows other embodiment about a sludge scraper.

Embodiments of the present invention will be described below. Each technique described in each embodiment can be similarly applied to other embodiments related in this application.
1 to 3 show an embodiment thereof. Reference numeral 1 denotes a sedimentation basin. The sedimentation basin 1 is a concave casing having a long rectangular plane in one direction, and includes both side walls 2 and 2 and front and rear end walls 3 and 3 and a bottom wall 4. . The right end wall 3 side in FIG. 2 is an upstream wall into which sewage flows, and is generally a rectifying wall with a rectifying hole, and the left end wall 3 side is a side through which clear water flows out through the overflow weir. ing.

  As shown in a schematic cross section in FIG. 2, a scum removing device having a fixed trough 5 and a weir 6 attached to the front side (upstream side) of the trough 5 so as to move up and down is provided between the side walls 2 and 2. 7 is mounted, and the weir 7 periodically goes up and down from the water surface 8 to squeeze the scum floating on the water surface 8 and remove it outside the pond through the trough 5 to stop the scum stagnation. It is supposed to be.

The bottom wall 4 is a surface that is slowly lowered and inclined from the left end of FIG. 2 to the right end of the sludge pit 10 at the right end. In this embodiment, the dimension between the downstream end wall 3 and the front end of the bottom wall 4 is set to about 15 m.
On the bottom wall 4, as shown in FIG. 1, a pair of left and right guide rails 11 are fixedly laid so as to be within a certain width with respect to the center between the pond widths (direction between the side walls 2 and 2). The rear end on the downstream side is positioned slightly in front of the end wall 3 as shown in FIG. 2, and the front end on the upstream side is fixed so as to protrude slightly on the sludge pit 10.

  As shown in FIG. 3, the guide rail 11 has an angle, and a seat plate 12 is passed to a bottom surface portion having a predetermined interval in the longitudinal direction, and a reinforcing rib 13 is appropriately provided and the whole is provided. The entire guide rail 11 is fixed by inserting a hole in the seat plate 12 into an anchor bolt that is constructed and planted in the bottom wall 4 and tightening it with a nut. Conventionally, the guide rail 11 is made of SUS in which a reinforcing rib 13 is integrally welded, and the SUS seat plate 12 is passed over and welded to the bottom surfaces of the left and right pairs.

  On the other hand, in this embodiment, as shown in FIGS. 4 and 5, the guide rail 11 is integrally formed as a long body with the reinforcing rib 13 and the seat plate 12 using a reinforced resin such as carbon fiber or glass fiber. It is a thing. As other resins, boron fiber reinforced resin, aramid fiber reinforced resin, polyethylene fiber reinforced resin, Zylon reinforced resin, PBT resin, PPS resin, and the like may be used. Hereinafter, these are collectively referred to as reinforced resin.

In this embodiment, the front and rear are not connected to each other, but are connected to each other. In this case, the guide rail 11 includes a front end piece 15 and a rear end piece 16 that are integrated with each other. In this manner, the front and rear are connected by fastening them through the anchor bolts 17.
At the rear end of the guide rail 11 on the downstream end wall 3 side, a sheave shaft 19 of a sheave 18 is attached for winding a link chain that drives the sludge scraping device to advance and retreat by pulling. For this reason, the seat plate 20 can be provided in common with the rear end piece 16.

  In FIG. 1 to FIG. 3, reference numeral 23 denotes an airframe (also referred to as an onboard machine), which is made of SUS and consists of two round pipes at the front and rear. 24 is a cradle, 25 is a rear cradle, and the cradle 24 is made of a rectangular groove with a groove facing downward, and its width substantially corresponds to the outer width of the pair of left and right guide rails 11, 1 and FIG. 2 are arranged at the front end position and the intermediate position on the right side, and the rear receiving base 25 is arranged at the left end position of FIG. 1 and FIG. The width is not as long as the pedestal 24 but is as short as the width of each guide rail 11 and consists of a pair of left and right.

A connecting member 26 made of an angle member is attached to the rear side of the front receiving base 24, and one (front) front body 23 a is integrally connected between the connecting member 26 and the intermediate receiving base 24. ing. A connecting member 26 is also attached to the rear side of the intermediate cradle 24, and another one (rear) rear machine body 23 b is connected and integrated between the connecting member 26 and the rear connecting member 26. ing. The rear connecting member 26 and the rear receiving base 25 are integrated. A stabilizing side roller 28 that rolls along the outside of the guide rail 11 and prevents the steadying is attached to the end of the connecting member 26.
In addition, as shown separately in FIG. 6, the airframe 23 may be flanged by joining a plurality of pipes, such as two, into a single pipe. Sometimes made of resin.

A connecting bracket 30 as shown in FIG. 7 is integrated at the front and middle positions of the airframe 23, and an axle 32 is attached to the bracket 30 via a bearing body 31, and wheels 33 are attached to both ends of the axle 32. So that it can roll on the guide rail 11. The rear wheels are pivotally supported in the rear cradle 25, but are not shown.
In addition, as shown in FIG.7 and FIG.8, the connection bracket 30 can be integrated in the said body 23, and these can also be made from reinforced resin. The bearing body 31 can be divided into two, and the upper half thereof can be integrated with the body 23 together with the connecting bracket 30 to be made of reinforced resin. Of course, the wheel 33 itself may be made of reinforced resin.

  On the upper side of the front / intermediate receiving base 24 and the rear receiving base 25 of the machine body 23, bearings 36 are arranged to form a pair of left and right so as to form a pair. The bearing 36 is a vertically aligned type, and a scraper shaft 38 of a sludge scraper 37 is rotatably attached through these.

  The sludge scraper 37 in FIGS. 1 to 3 is made of SUS including a scraper shaft 38, that is, a scraper shaft 38 having a round pipe shape, a scraper main body 39 provided on both sides thereof, and an inner end of the main body 39. A rubber plate 42 is attached to the front edge of the scraper body 39 via a fastening tool 41 as shown in the left diagram of FIG. In this case, if the rubber plate 42 and the fastening tool 41 are protruded from the front surface of the scraper main body 39, the residue contained in the sludge is entangled there. However, as shown in the right column of FIG. 12, the scraper main body 39 is made of reinforced resin and its lower edge portion is formed in a stepped shape so that the rubber plate 42 and the fastening device 41 are accommodated therein. Such entanglement disappears.

Further, as shown in FIGS. 9 and 10, a sludge scraper 37 including a scraper shaft 38 and a scraper body 39 is made of reinforced resin, and is initially formed into a horizontally long shape as shown in FIG. At the same time, by appropriately cutting along the cut line c so as to match the pond width and pond bottom shape, a sludge scraper adapted to the pond specification can be easily provided.
Reference numeral 44 denotes a central scraper plate, and this plate 44 may also be integrated with the sludge scraper 37 or may be retrofitted separately as shown in FIG.
Furthermore, as shown in FIG. 11, the scraper main body 39 may be made of reinforced resin, and a bent scraper shaft 38 may be separately attached thereto.

  As shown in FIGS. 1 to 3, three scraper shafts 38 are provided at the front and rear, and the distance between the front and rear is 4.2 m. In addition, a first interlocking lever 46 is provided in a projecting manner so as to be integrally rotatable in front of the scraper shaft 38 and at an intermediate position between them. The interlocking lever 46 is connected to the second interlocking lever 47, and one end thereof is connected to the upper end of the roller bracket 48. A first interlocking lever 46 protrudes also from the rear scraper shaft 38, and this lever 46 is connected to the rear end of the interlocking bar 50 that is passed in parallel to the bottom side of the machine body 23 so as to be interlocked.

  The interlocking bar 50 is formed of a square or a round pipe, and a roller bracket 48 provided so as to protrude upward from the middle thereof is provided with a roller 51 so as to advance and retreat along the upper abdominal surface of the machine body 23. A traction transmission material 53 such as a link chain or a wire is connected to the front and rear ends of the interlocking bar 50, and the front traction transmission material 53 is connected to a drive source 56 in a reinforced resin cover 55 on the pond via a sheave 54. The rear traction transmission member 53 is also wound around a drum as a drive source via a sheave 54 so as to be able to be pushed.

  1 and 2, the sludge scraping device returns so that the rear sludge scraper 37 is in front of the rear (downstream) end wall 3. At that time, when the front traction transmission material 53 is driven and the interlocking bar 50 is driven forward through the roller 51, each scraper body 39 is in a state of being lowered vertically, and is ready to scrape. Yes. When the scraper main body 39 stops vertically, the interlocking bar 50 advances the machine body 23 in synchronization.

  As a result, the sludge is scraped forward by the sludge scraper 37. The airframe 23 moves forward with a stroke of about 6 m, and the sludge scraper 37 at the front end moves forward until it is on the sludge pit 10, and sludge is dropped into the pit. However, the sludge scraped by the two sludge scrapers 37 is stopped only by being pushed forward by 6 m. These sludges will be pushed forward in the next stage.

  When the forward movement is finished, the rear traction transmission member 53 is driven, whereby the interlocking bar 50 is driven backward, so that the sludge scraper 37 is all raised and returned to a ready state. 23 is synchronized and returned backwards. After that, the front traction transmission material 53 becomes a check side and enters a scraping posture.

  As shown in FIG. 2, a support 58 is erected on the machine body 23, and a scum scraper 59 that can be tilted up and down is attached to the upper end thereof. The scum scraper 59 rises on the water surface 8 when facing left in FIG. 2 so as to scrape the scum toward the scum removing device 7. In such a scum removal system, the support 58, the scum scraper 59, the trough 5, and the weir 6 can be made of reinforced resin.

  DESCRIPTION OF SYMBOLS 1 ... Sedimentation basin 2 ... Side wall 3 ... End wall 4 ... Bottom wall 5 ... Trough 6 ... Weir 7 ... Scum removal apparatus 10 ... Sludge pit 11 ... Guide rail 12 ... Seat plate 13 ... Reinforcement rib 23 ... Airframe 30 ... Connection bracket 37 ... Sludge scraper 38 ... Scraper shaft 39 ... Scraper body.

Claims (1)

In a sedimentation basin formed into a plane rectangle by side walls facing each other in the left-right width direction, end walls facing each other in the longitudinal direction which are front and rear orthogonal to these, and a bottom wall having a sludge pit corresponding to one end in the longitudinal direction A guide rail is installed at an intermediate position in the left-right width direction on the bottom wall in a state where the longitudinal direction of the bottom wall is directed to the longitudinal direction of the bottom wall. Are provided to move forward and backward in the longitudinal direction by rolling the wheels arranged at the front and rear positions on the guide rail, and the body is provided with a pair of left and right via each of the cradles provided at a plurality of front and rear positions. The top and bottom type bearings are provided, and each bearing has a single round pipe-shaped scraper shaft that is rotatable at a fixed length, and a plate surface shape that is spaced apart from each other on the left and right of the scraper shaft. Scrap When the sludge scraper consisting of the main body rotates around the scraper shaft and descends, the sludge is squeezed in the direction of the sludge pit, while when it rotates around the scraper shaft and rises, it passes above the sludge and returns. A method for producing a scraper body of the sludge scraper in a sludge scraping device provided to be vertically switchable, wherein the left and right scraper bodies are mounted on left and right portions of the scraper shaft. The width of the sedimentation basin where the sludge scraping device is to be installed is assumed to be the one that is integrally molded with reinforced resin as a horizontally long rectangular plate with a lateral length that exceeds the left and right width. A method for producing a scraper body of a sludge scraping device that is cut to a length that fits inside and cut to match the outer shape to the pond bottom shape .

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