JP5843447B2 - Scum remover - Google Patents

Description

  The present invention relates to a scum removing device having a pipe clearance.

  Conventionally, in a scum removing device provided with this type of pipe skimmer, the pipe skimmer is installed in such a manner that a part of the pipe skimmer is submerged in the water surface on the downstream side of the water tank in which the scum is generated. For example, if the tank is a sedimentation basin of a sewage treatment facility, the pipe skimmer is installed in such a way that part of it is submerged in front of the sedimentation water extraction side that is provided on the opposite side of the sedimentation basin from the raw water inflow side. ing.

  This conventional pipe clearance is made of a pipe material having a length equal to the water channel width in a direction orthogonal to the water flow direction of the settling basin, and the pipe material is provided with an opening (notch) opened in the axial direction. ing. And this pipe skimmer is comprised so that it may be rotated by the rotational drive apparatus centering on the axial center of a longitudinal direction, and it rotates so that a part of opening part may be immersed in water at the time of scum removal. When water flows into the opening by this rotation, the scum is entrained by the flowing water and flows into the pipe skimmer. The rotational drive device includes a motor with a speed reducer, a switch for controlling the rotation angle, and the like.

  As described above, when the scum is discharged only by the flow of water, the flow of water is not fast. Therefore, in Patent Document 1, a part of the opening of the pipe skimmer is submerged in water when the scum is removed. It is disclosed that, when rotated, air is ejected from a nozzle tube provided in the water upstream of the position of the opening toward the opening to enhance the movement of the scum. . Patent Document 2 discloses that a spray nozzle is provided at an upper position of the scum, and pressure water is ejected obliquely downward from the spray nozzle to impart a moving force to the scum.

  However, when the generated scum floating on the water surface is in a thin film shape, for example, in the case of a thin film scum generated in the final sedimentation basin of a sewage treatment facility, as shown in Patent Document 1 or Patent Document 2 above The scum moving means cannot be used at all.

  For example, it is difficult to increase the movement of the scum by ejecting air from a nozzle pipe provided in the upstream water in the opening of the pipe skimmer of Patent Document 1. This is because the thin film scum floating on the surface of the water floats with a very delicate force relationship, so when air is ejected from the bottom of the scum, turbulence occurs in the water flow, and the scum flocks. This is because the scum mixed in the water rises again at the position moved below the pipe clearance and is discharged and contained in the treated water, leading to a reduction in the quality of the discharged water.

  Similarly, even if the pressure water for transfer is ejected on the upper surface of the scum shown in Patent Document 2, it is difficult to adopt because the scum is flocked by generating a turbulent flow in the water flow.

  Therefore, the present applicant has proposed a scum removing device shown in Patent Document 3 in order to solve the above-mentioned drawbacks. This scum removing device has a depth which is located below the scum generated on the water surface when the opening is located on the water surface at the lower side forming the opening provided in the pipe skimmer. When a fluidized plate extending a predetermined length is provided on the upstream side of the water flow while maintaining a certain thickness, and a part of the opening is located in the water at a predetermined position upstream of the water flow than the position of the tip of the fluidic plate. In addition, water is ejected from the ejection nozzle toward the opening.

  According to the scum removing device according to this proposal, it is possible to generate a water flow with a high flow velocity on the upper surface side of the fluid plate compared to the periphery facing the opening, and flock the scum with the fast water flow. And can be reliably moved to the opening in a short time.

  For this reason, while being able to prevent the quality of the treated water discharged | emitted from being deteriorated, the amount of water accompanying scum discharge can be reduced and energy saving can be achieved. That is, the scum removing device according to this proposal has a property that can greatly contribute to so-called ecological measures.

Japanese Utility Model Publication No. 53-88071 Japanese Patent Laid-Open No. 9-276860 JP 2010-46622 A

  However, the scum removing device having the conventional pipe skimmer is configured to rotationally drive the pipe skimmer by a rotation mechanism device having a motor or the like, and thus has the disadvantage that the equipment cost increases and the operation cost increases. was there.

  The present invention has been made to solve the above-described drawbacks, and an object of the present invention is to provide a scum removing device capable of rotating a pipe skimmer without using a special rotating mechanism device such as a motor. There is.

Scum removing apparatus according to the present invention, in order to achieve the above object, together with the open mouth is located above the water surface, times as part of the opening which is located on the water surface is located below the surface of the water A scum removing device comprising a moving pipe skimmer main body and a rotating mechanism for rotating the pipe skimmer main body, wherein the rotating mechanism settles and accumulates in a sedimentation basin in which the pipe skimmer main body is installed. An operating rod that is lifted upward when it comes into contact with a flight that discharges sludge and descends when the flight deviates from the flight, and a conversion mechanism that converts the vertical movement of the operating rod into rotational movement of the pipe skimmer body Do Ri, the vertical movement of the actuating rod is effected via a contact portion which is raised and lowered by a roller provided on the flight, the abutting portion, respectively parallel to the bottom surface of the lower and upper surfaces are settling basin Reverse stand It is characterized in that it is formed by a cube.

  And, for example, when the opening provided in the pipe skimmer is located on the water surface, the conversion mechanism is located below the scum where the base is located on the lower side of the opening and the tip is generated on the water surface. A connecting rod that is rotatably provided in a guide portion that extends a predetermined length upstream of the water flow while maintaining a depth positioned at one end, and one end portion that is rotatably provided in the middle of the operating rod and the other end The portion is provided with a lever rod rotatably provided at the lower end portion of the connecting rod, and an intermediate part is rotatably supported.

  Further, for example, the conversion mechanism has a connecting rod whose tip is pivotably provided near the opening of the pipe skimmer body, one end is pivotally provided in the middle of the operating rod, and the other end is It is characterized by comprising a lever rod provided rotatably at the lower end of the connecting rod and having a middle portion rotatably supported.

Further, for example, the conversion mechanism is characterized in that a part in the middle of the operating rod and a part around the pipe skimmer body are rotatably connected .

Further, for example, a connecting pipe having an internal thread is provided in the middle of the operating rod, and the length of the operating rod is adjusted by the amount of the operating rod screwed into the connecting tube .

  According to the present invention, the pipe skimmer body can be rotated without providing an original rotation device, and the equipment cost and the operation cost can be reduced. Therefore, it can greatly contribute to so-called ecological measures.

It is a schematic diagram of a scum removing apparatus according to a first embodiment of the present invention. It is a schematic view for explaining a rotating mechanism for rotating the pipe clearance body scum removing apparatus according to an exemplary first embodiment.

It is explanatory drawing which shows the state which the pipe skimmer main body of the scum removal apparatus concerning 1st embodiment rotated. Is a schematic diagram for explaining a rotation mechanism for rotating the pipe clearance body scum removing apparatus according to a second embodiment of the present invention, (a) shows the state in which the opening is located on the water surface, ( b) shows a state in which a part of the opening is located below the water surface.

Is a schematic diagram for explaining a third embodiment of the rotating mechanism for rotating the pipe clearance body scum removing apparatus according to the embodiment of the present invention, (a) shows the state in which the opening is located on the water surface, ( b) shows a state in which a part of the opening is located below the water surface.

(First embodiment)
Hereinafter, a first embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a scum removing device a1 according to a first embodiment of the present invention, which is installed in a final sedimentation basin (hereinafter referred to as “sedimentation basin”) b of a sewage treatment facility. The state is shown.

  In the sedimentation basin b, water is configured to flow from the left side to the right side (the same applies to FIGS. 3, 4 (a), (b) and FIGS. 5 (a), (b) described later). And in this sedimentation basin b, like the known sedimentation basin b, a sludge scraping mechanism that discharges the sedimented sludge to a pit (not shown) provided at the bottom of the upstream side of the water flow (left side in FIG. 1). Here, only one flight F in the sludge scraping mechanism is shown to simplify the drawing. Hereinafter, the direction in which water flows will be described as the upstream side, and the direction in which water flows will be described as the downstream side.

  The flight F moves from the downstream side to the upstream side along the bottom surface b1 of the settling basin b in the water, and moves from the upstream side to the downstream side on the water surface, similarly to the known sludge scraping mechanism. A predetermined distance is provided between a pair of endless chains (not shown). That is, the flight F is provided on the bottom surface b1 side of the settling basin b so that the bottom surface is in contact with the bottom surface b1, and the longitudinal direction is orthogonal to the flow of water.

  Therefore, when the pair of endless chains are driven by a drive source (not shown), the flight F moves as shown by the white arrow in FIG. 1 and discharges sludge settled and accumulated on the bottom surface b1 to the pit. be able to.

  Rollers R are provided on some of the flights F. The roller R is rotatably provided on a support shaft extending in the same direction as the flight F on one end side in the longitudinal direction of the flight F, and the upper surface position of the roller R protrudes from the upper surface position of the flight F. Is provided.

And the installation position of this roller R is determined so that it may oppose the contact part 14 mentioned later, and it is provided in the vicinity of one chain in a pair of chains which drive the flight F.
The scum removing device a1 includes a pipe skimmer body 1 and a rotation mechanism 10.

  The pipe skimmer main body 1 is provided in the water surface portion on the downstream side of the settling basin b so as to be partially submerged and over the entire width of the water channel in the direction orthogonal to the water flow direction. The pipe clearance body 1 has a pipe portion 2 made of a pipe material having a circular cross-sectional shape. The pipe portion 2 is located in a scum pit (not shown) having one end passing through one tank wall of the settling basin b and provided outside the tank wall, and includes a scum from the opened one end. It is configured so that water can be discharged into the scum pit. And while the other end part of the pipe part 2 is formed in closed shape, it is rotatably provided in the other tank wall of the sedimentation tank b.

  That is, this pipe part 2 is rotatably provided between both tank walls of the settling basin b. Further, the pipe portion 2 is provided with an opening (notch portion) 3 opened in the axial direction. The inner diameter of the pipe portion 2 is determined so that water including scum taken in from the opening 3 can be quickly discharged into the scum pit.

  The pipe clearance main body 1 includes a guide portion 4. This guide part 4 has a plate-shaped fluidized plate 5 made of steel or synthetic resin, and has a rectangular plate shape, from the position of the lower side forming the opening 3 of the pipe part 2 toward the upstream side. It is provided to extend a predetermined distance (a distance corresponding to the short side length of the rectangle toward the left side in FIG. 1).

  That is, the fluid plate 5 has one end side (the right side in FIG. 1) corresponding to the base of the fluid plate 5 joined to the lower side forming the opening 3. The other side of the fluid plate 5 (the tip of the fluid plate 5) is curved downward, and the lower end of the curve is always near the water surface regardless of the rotational position of the pipe skimmer body 1. (Refer to FIG. 1 and FIG. 3).

  A cover 6 made of a flat plate material is provided between the front end portion of the fluid plate 5 of the guide portion 4 and the lower portion of the pipe portion 2. In the illustrated example, the fluidized plate 5 and the cover 6 are configured separately, but the fluidized plate 5 and the cover 6 may be formed integrally by folding the tip of the fluidized plate 5.

  As described above, when the cover 6 is provided on the lower side of the fluid plate 5, the stagnation of the water flow is eliminated on the lower surface side of the fluid plate 5, and scum retention on the lower surface of the guide portion 4 can be suppressed. .

  The rotation mechanism 10 includes an operating rod 11, a connecting rod 12, a lever rod 13, and a contact portion 14. The connecting rod 12 and the lever rod 13 correspond to the conversion mechanism of the present invention.

  The working rod 11 is provided in a vertical shape on the downstream side of the pipe portion 2 of the pipe skimmer main body 1, the upper end portion being located on the water surface, and the lower end side being located near the bottom surface b1 of the settling basin b. The operating rod 11 is movably provided in a vertically extending opening formed in the frame 15 on the water surface, and the lower end portion of the operating rod 11 can be kept at a predetermined distance from the bottom surface b1. A stopper 16 is provided.

  A base portion is fixed to a tank wall of the settling basin b at a predetermined interval in a part of the longitudinal direction of the operating rod 11, and a plurality of pieces (not shown) are supported to freely move the operating rod 11 up and down. In this example, three) steady rest members 11a, 11a... Are provided.

  Further, near the lower end of the operating rod 11, an internal thread is provided inside, and a connecting pipe 17 having a connecting portion of the lever rod 13 is provided outside. Therefore, the amount of screwing of the operating rod 11 above the position of the connecting tube 17 with respect to the connecting tube 17 is adjusted, or the amount of screwing of the operating rod 11 below the position of the connecting tube 17 with respect to the connecting tube 17 is adjusted. By doing so, the substantial length of the operating rod 11 can be adjusted. Further, a contact member 14 described in detail later is provided at the lower end of the operating rod 11.

The connecting rod 12 is configured such that its upper end portion is a side surface of the guide portion 4 of the pipe skimmer main body 1 and is rotatably provided near its distal end side, and its lower end portion extends downward by a predetermined distance. A base portion is fixed to a tank wall of the settling basin b at a predetermined interval in a part of the connecting rod 12 in the longitudinal direction, and a plurality of pieces (not shown) are supported to freely move the connecting rod 12 up and down. In the example, two) steady rest members 12a, 12a... Are provided.

That is, the upper end portion of the connecting rod 12 is configured to be movable in the longitudinal direction of the guide portion 4 ( vertical direction in FIG. 1) when the connecting rod 12 moves vertically in the steady rest members 12a, 12a. It is comprised so that the pipe skimmer main body 1 can be rotated.

  The lever rod 13 is rotatably provided at one end of the connecting tube 17 provided in the middle of the operating rod 11, and the other end of the lever rod 13 is rotatably provided at the lower end of the connecting rod 12. A part of the middle is rotatably supported by a support shaft 18 provided on the tank wall of the settling basin b. The one end and the other end of the lever rod 13 are also in the longitudinal direction of the lever rod 13 when the connecting rod 12 is moved vertically in the steady members 12a, 12a. It is connected so that it can move (horizontal direction in FIG. 1), and it is comprised so that the pipe skimmer main body 1 can be rotated. One end portion of the lever rod 13 is also connected so that the connecting portion of the connecting tube 17 can move along the longitudinal direction of the lever rod 13 when the operating rod 11 moves in the vertical direction.

  The contact portion 14 is formed of an inverted trapezoidal cube with respect to the direction of water flow. That is, the abutting portion 14 is formed such that the lower surface and the upper surface are parallel to the bottom surface b1 of the settling basin b, and the length of the lower surface is shorter than the length of the upper surface in the direction of water flow. Therefore, the downstream side of the contact portion 14 is formed as a slope that faces downward as it goes from the downstream side to the upstream side, and the upstream side of the contact portion 14 is formed as a slope that faces upward as it goes from the downstream side to the upstream side. Yes.

  The bottom surface position of the contact portion 14 is determined to be slightly above the shaft position of the roller R and below the top surface position of the roller R. Further, a lower end portion of the operating rod 11 is provided at the center position of the upper surface of the contact portion 14. Further, the contact portion 14 is determined so as to face the installation position of the roller R as described above.

  Accordingly, when the roller R comes into contact with the contact portion 14 as the flight F moves, the contact portion 14 is lifted and the operating rod 11 is lifted upward, and when the roller R is removed from the contact portion 14, The contact portion 14 is lowered and the operating rod 11 can also be lowered. The weights of the contact portion 14 and the operating rod 11 are determined so that the pipe skimmer body 1 can be sufficiently rotated.

  FIG. 2 is a schematic diagram of the rotating mechanism 10 having the above-described configuration, and schematically shows the operation of the mechanism for rotating the pipe skimmer body 1. Hereinafter, the operation of the rotation mechanism 10 will be described with reference to FIG. 2 in addition to FIG.

  When the contact portion 14 is raised by the roller R (not shown in FIG. 2), the operating rod 11 is raised by the amount that the contact portion 14 is raised. The raising of the operating rod 11 rotates the lever rod 13 around the support shaft 18 and moves the tip end side of the lever rod 13, that is, the side rotatably connected to the connecting rod 12, downward. Become.

  The downward movement of the connecting rod 12 is the downward movement of the upper end portion of the connecting rod 12, and a force to move downward is applied to the guide portion 4 that is rotatably connected to the upper end portion. become. When a force to move downward is applied to the guide portion 4, the pipe skimmer main body 1 connected to the guide portion 4 rotates about the axis of the pipe portion 2.

FIG. 3 shows a state when the pipe skimmer body 1 is rotated. The degree of this rotation is such that the position of the support shaft 18 of the lever rod 13 and the position of the connecting pipe 17 in the operating rod 11 are determined so that the water surface position is substantially in the middle of the opening 3 of the pipe portion 2. .

  When the movement of the roller R progresses and the roller R comes off from the contact portion 14, the operating rod 11 descends by its own weight, and the pipe skimmer body 1 acts on the axis of the pipe portion 2 in the reverse direction. To return to the state shown in FIG.

  The above-described vertical movement of the contact portion 14, that is, the rotation of the pipe skimmer main body 1 is determined by the scum generation situation so far because the scum generated by the water quality flowing into the settling basin b is not uniform. When the discharge of the scum is insufficient in the time for one flight F to make one rotation, the roller R is attached to the plurality of flights F.

Next, the scum removing operation will be described with reference to FIG.
Now, it is assumed that the sedimentation basin (final sedimentation basin of the sewage treatment facility) b is performing the sedimentation process, and the roller R contacts the contact portion 14 and a part of the opening 3 of the pipe portion 2 is located in the water. At the same time, pressure water is jetted from a jet nozzle (not shown) that is provided upstream in the fluid plate 5 and is provided in the water and whose jet direction is directed to the opening 3. Then, the flow of water toward the opening 3 is promoted.

Then, the scum S is moved into the pipe portion 2 along with the accelerated flow of water while maintaining a thin film shape without being flocked, and is sucked into the pipe portion 2. That is, rectification toward the opening 3 is generated on the upper surface of the fluid plate 5, and the fluid plate 5 serves as a fluid device.
Note that the above-described ejection nozzle can be omitted when the scum is discharged satisfactorily without the ejection of pressure water from the ejection nozzle.

  The scum S that has flowed into the pipe part 2 moves in the pipe part 2 and is discharged into the scum pit, and the scum S in the scum pit is processed by a processing means such as a sludge treatment machine (not shown). Further, the treated water that has been subjected to the sedimentation treatment in the sedimentation basin b is discharged into a water system such as a river.

  When the movement of the roller R advances and the roller R is removed from the contact portion 14, the operating rod 11 descends and acts oppositely to the above so that the pipe skimmer body 1 rotates about the axis of the pipe portion 2. The opening 3 is positioned on the water surface, and the injection of the pressure water from the ejection nozzle is stopped.

  The above-mentioned example is when the scum removing device a1 is installed in the final sedimentation basin of the sewage treatment facility, but in the case where it is installed in the first sedimentation basin of the sewage treatment facility, the jet provided in the above-described water Instead of the nozzle, a spray nozzle is provided on the upstream side of the fluidized plate 5 and on the water surface, and the ejection direction is directed to the opening 3.

  And while the contact part 14 is rising, that is, while a part of the opening 3 of the pipe part 2 is located in the water, pressure water is ejected obliquely downward from the spray nozzle, and the scum S has a moving force. Is granted. Of course, the spray nozzle can be omitted when the scum is discharged well without the ejection of pressure water from the spray nozzle.

As described above, the scum removing device a1 according to the present embodiment is provided in the flight F that discharges sludge that has settled and accumulated in the pipe skimmer body 1 and the sedimentation basin b in which the pipe skimmer body 1 is installed. When the roller R comes into contact with the contact portion, it is lifted upward, and when the roller R is removed from the contact portion, the operating rod 11 is lowered, and the upper end portion rotates to the guide portion 4 of the pipe skimmer body. A connecting rod 12 that is movably provided, and one end portion is provided rotatably in the middle of the operating rod 11, and the other end portion is provided rotatably at the lower end portion of the connecting rod 12, and an intermediate Part of the lever is supported by a lever rod 13 that is pivotally supported, so that the pipe skimmer body 1 can be rotated without using an original rotating device, and the equipment and operating costs are reduced. Can be reduced. Therefore, the scum removing device according to the present embodiment has a property that can greatly contribute to so-called ecological measures.

(Second embodiment)
A second embodiment according to the present invention will be described below with reference to FIG. Also in the second embodiment, the same reference numerals are given to the same components as those in the first embodiment described above, and the detailed description is omitted. FIG. 4 is a schematic diagram for explaining a turning mechanism for rotating the pipe skimmer main body 1 of the scum removing device a2 according to the second embodiment of the present invention. FIG. 4A is a diagram illustrating the position of the opening on the water surface. (B) shows a state in which a part of the opening is located below the water surface.

  The scum removing device a2 is different from the scum removing device a1 of the first embodiment described above in that the pipe skimmer body 1 does not have the guide portion 4, and therefore the upper end portion of the connecting rod 12 is connected to the pipe skimmer. That is, it is provided near the opening 3 of the main body 1 so as to be rotatable.

  Since the scum removing device a2 of the second embodiment does not have the guide portion 4, the scum removing device a2 can have a simpler structure, but is similar to the scum removing device a1 of the first embodiment. In addition, the pipe skimmer body 1 can be rotated without using an original rotation device, and the facility cost and the operation cost can be reduced.

(Third embodiment)
A scum removing device a3 according to a third embodiment of the present invention will be described below with reference to FIG. Also in the third embodiment, the same reference numerals are given to the same components as those in the above-described embodiment, and the detailed description is omitted.

  FIG. 5 is a schematic diagram for explaining a turning mechanism for rotating the pipe skimmer body 1 according to the third embodiment of the present invention. FIG. 5A shows an opening located on the water surface. A state, (b) shows a state in which a part of the opening is located below the water surface.

  The scum removing device a3 of the third embodiment differs from the scum removing device a1 of the first embodiment in that the pipe skimmer main body 1 does not have the guide portion 4, and further, the connecting rod 12 and the lever rod 13 are not provided. And a part in the middle of the operating rod 11 and a part around the pipe skimmer body 1 are rotatably connected.

  That is, in the scum removing device a3, the vertical movement of the operating rod 11 is directly transmitted to the pipe skimmer body 1. According to the scum removing device a3 of the third embodiment, the structure can be made simpler than that of the second embodiment, and similarly to the scum removing devices a1 and a2 of the above embodiment, The pipe skimmer main body 1 can be rotated without using an original rotation device, and the facility cost and the operation cost can be reduced. In this scum removing device a3, the pipe skimmer body 1 may be provided with the same guide portion 4 as described above.

The scum removing device according to the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above embodiment, and the gist of the present invention is described. Design changes can be made without departing from the scope.
For example, in the above-described example, the roller R is provided only on one end side in the longitudinal direction of the flight F, but the roller R is disposed on the other end side in the longitudinal direction of the flight F, that is, on the other side of the pair of chains. While being provided near the chain, the same rotation mechanism 10 as described above may be provided for the roller R.

As described above, according to each embodiment, the pivot mechanism that pivots the pipe skimmer body is provided in the flight that discharges the sludge that has settled and accumulated in the sedimentation basin in which the pipe skimmer body is installed . When the roller comes into contact with the contact part, it is lifted upward, and when the roller is removed from the contact part, the operating rod that descends and the vertical movement of the operating rod is converted into rotational movement of the pipe skimmer body. Ri Do and a mechanism, the vertical movement of the actuating rod is of being performed via an abutment which is raised and lowered by a roller provided in the flight times without having their own rotating apparatus pipe clearance body It is possible to reduce the equipment cost and the operation cost. Therefore, the scum removing device according to this proposal has a property that can greatly contribute to so-called ecological measures.

  Furthermore, when the opening provided in the pipe skimmer is located on the water surface, the conversion mechanism is located at the lower side of the opening and the tip is located below the scum generated on the water surface. A connecting rod that is pivotally provided in a guide portion that extends a predetermined length upstream of the water flow while maintaining a depth to be configured, and one end portion that is pivotally provided in the middle of the operating rod, and the other end portion is Since it is provided with a lever rod which is pivotally provided at the lower end of the connecting rod and whose middle part is rotatably supported, the pipe skimmer body can be easily assembled without using a unique rotating device. It can be rotated.

  In addition, the conversion mechanism includes a connecting rod whose tip is pivotably provided near the opening of the pipe skimmer body, one end is pivotally provided in the middle of the operating rod, and the other end is the aforementioned Since it consists of a lever 桿 that is pivotally provided at the lower end of the connecting rod and whose middle part is rotatably supported, the pipe skimmer body can be easily rotated without using its own rotating device. Can move.

Furthermore, since the conversion mechanism is configured such that a part in the middle of the operating rod and a part around the pipe skimmer body are pivotably connected, the pipe skimmer body can be easily rotated without using a unique rotation device. In addition, it can be rotated by a simple mechanism.
In addition , a connecting pipe having an internal thread is provided in the middle of the operating rod, and the length of the operating rod is adjusted by the amount of the operating rod screwed into the connecting tube, so that the rotation angle of the pipe skimmer body can be adjusted. It can be done easily.

a1, a2, a3 ... scum removal device b ... sedimentation basin b1 ... bottom F ... flight R ... roller 1 ... pipe clearance main body 2 ... pipe part 3 ... opening 4 ... guide part 5 ... ... Fluid plate 6 ... Cover 10 ... Turning mechanism 11 ... Actuation rod 11a ... Stabilization member 12 ... Connection rod 12a ... Stabilization member 13 ... Lever rod
14 …… Abutting part 15 …… Frame 16 …… Stopper 17 …… Connecting pipe 18 …… Spindle S …… Scum

Claims (5)

A pipe skimmer body that rotates so that the opening is positioned on the water surface and a part of the opening positioned on the water surface is positioned below the water surface, and a rotation mechanism that rotates the pipe skimmer body A scum removing device comprising:
The rotation mechanism is
An operating rod that is lifted upward when it comes into contact with a flight that discharges sludge that has settled and accumulated in the sedimentation basin where the pipe skimmer body is installed, and descends when it comes off the flight;
A conversion mechanism for converting the vertical movement of the actuating rod into rotational movement of the pipe clearance body, Ri Tona,
The vertical movement of the operating rod is performed through a contact portion that is moved up and down by a roller provided in the flight, and the corresponding contact portion is an inverted trapezoid whose lower surface and upper surface are parallel to the bottom surface of the settling basin, respectively. scum removing apparatus characterized by being formed by a cube. The scum removing device according to claim 1,
The conversion mechanism is:
When the opening provided in the pipe skimmer is located on the water surface, the base is located at the lower side of the opening and the tip is kept at a depth located below the scum generated on the water surface. A connecting rod provided rotatably on a guide portion extending a predetermined length upstream of the water flow;
A lever whose one end is rotatably provided in the middle of the operating rod, the other end is rotatably provided at the lower end of the connecting rod, and a middle portion is rotatably supported桿,
A scum removing device comprising: The scum removing device according to claim 1,
The conversion mechanism is:
A connecting rod provided with a tip end pivotable near the opening of the pipe skimmer body;
A lever whose one end is rotatably provided in the middle of the operating rod, the other end is rotatably provided at the lower end of the connecting rod, and a middle portion is rotatably supported桿,
A scum removing device comprising: The scum removing device according to claim 1,
The conversion mechanism is:
A part in the middle of the working rod and a part around the pipe skimmer body are rotatably connected,
A scum removing device characterized by that. In scum removal apparatus according to any one of claims 1-4, in the middle of the actuating rod, the connecting pipe is provided with internal threads, the length of the actuating rod by screwing amount of the operating lever for the coupling pipe The scum removing device characterized in that the height is adjusted.

Images