JP2019042711A - Float removal device - Google Patents

Abstract

To provide a float removal device capable of stably maintaining a height position of a suction port capable of removing the float.SOLUTION: A float removal device 100 includes a single float 1 floating on a liquid surface, a pump main body 3 provided below the float 1 and generating a suction force for suctioning the float near the liquid surface, and a tubular suction member 2 connected to the pump main body 3 and the float 1 and separate from the float 1, and the tubular suction member 2 includes a groove-shaped float suction portion 22a which takes in the float by making the float pass through from the outer peripheral portion to the inner peripheral portion.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a floating matter removing device provided with a float floating on a liquid surface.

  DESCRIPTION OF RELATED ART Conventionally, the floating substance removal apparatus provided with the float which floats on a liquid level is known (for example, refer patent document 1).

  In Patent Document 1 described above, a plurality of floats floating on the liquid surface, a pump provided below the float and generating suction force for suctioning floating matter in the vicinity of the liquid surface, and opened upward in a circular shape There is disclosed a floating matter removing device comprising a suction portion having a suction port.

Unexamined-Japanese-Patent No. 2015-21972

  However, when the distance between the suction port below the liquid surface and the liquid surface is small, the floating material removal apparatus of Patent Document 1 has a pump that protrudes slightly above the liquid surface when the device slightly rises. There is a disadvantage that the air is sucked and the suction function of the pump is reduced. On the other hand, when the space between the suction port below the liquid surface and the liquid surface is large, there is a disadvantage that only the liquid below the floating material is sucked without sucking the floating material. Also, if there is a change in the pump operating environment such that the flow rate of the pump changes, the range of the height position of the suction port that is permitted for removing the floating matter is small, so the floating matter can not be sucked. There is a disadvantage. That is, in the floating matter removing device of Patent Document 1, it is considered that it is difficult to stably maintain a predetermined height position of the suction port capable of removing the floating matter.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to stably maintain the height position of the suction port capable of removing the floating matter. It is providing a flotage removing device.

  A flotage removing device according to one aspect of the present invention includes a single float floating on a liquid surface, a pump body provided below the float and generating a suction force for sucking the float near the liquid surface, and a pump body And a tubular suction member which is connected to the float and is separate from the float, and the tubular suction member is in the form of a groove for taking in the floating matter by passing the floating matter from the outer peripheral portion to the inner peripheral portion. Includes float suction. Here, the suspended matter is a substance suspended on the liquid surface, and includes sludge lump (scum), foam, fallen leaves, algae, oily substance separated from water, supernatant liquid, and the like.

  In the floating material removal apparatus according to one aspect of the present invention, as described above, the groove-like floating material suction unit takes in the floating material by causing the cylindrical suction member to pass the floating material from the outer peripheral portion to the inner peripheral portion. Compared to the case where the floating material is sucked upward by the circularly-opened suction port by providing the groove, the groove-like floating material suction portion is larger in the height direction range in which the floating material can be removed Since the width can be given, natural flow (overflow) allows the float suction portion to function as an opening of a weir that takes the float into the inside of the suction member. As a result, it is possible to stably maintain the height position of the suction port capable of removing the floating matter. In addition, since the floating matter removing device includes a single float, the device configuration can be simplified and the device can be miniaturized as compared with the case where there are a plurality of floats. In addition, compared with the case where there are a plurality of floats, position adjustment of the floats can be easily performed.

  In the flotage removing device according to the above aspect, preferably, the flotage suction portion includes an upper end portion disposed at a height position higher than the liquid surface and a lower end portion disposed at a height position lower than the liquid surface. including. According to this structure, the floating matter can be taken into the inside of the suction member by a natural flow from a position higher than the lower end, so that a relatively high flow velocity can be generated in the vicinity of the liquid surface. As a result, the floating matter can be sucked (removed) effectively. In addition, when a change occurs in the driving environment of the pump body such that the flow rate of the pump body changes, the water level inside the floating material suction portion is raised or lowered with respect to the lower end along with the change of the flow rate of the pump body. Therefore, the open area of the float suction portion functioning as the opening of the weir can be varied. As a result, it is possible to balance the amount of liquid (floating matter) taken into the inside of the suction member by natural flow and the flow rate of the pump body. In short, the flotage removing device automatically follows (corresponds to) the fluctuation of the water level inside the flotage suction portion caused by the change of the driving environment of the pump main body, and the fluid flow in the flotage removing device becomes steady state. It can be done (stabilized). Thereby, before and after the change of the drive environment of the pump main body, it is possible to maintain the state capable of removing the suspended matter. When the flow rate of the pump main body is increased due to a change in the driving environment of the pump main body, the water level inside the floating substance suction portion is lowered with respect to the lower end (the open area of the floating substance suction portion is increased). Conversely, when the flow rate of the pump main body decreases due to a change in the driving environment of the pump main body, the water level inside the floating substance suction part rises relative to the lower end (the open area of the floating substance suction part decreases).

  In the flotage removing device according to the aforementioned aspect, preferably, the cylindrical suction member is formed to surround the float in plan view. According to this structure, since the suction member is disposed around the float in a well-balanced manner, the posture of the entire device can be stably maintained.

  In this case, preferably, the inner surface of the cylindrical suction member has a shape along the outer surface of the float, and floats are formed between the inner surface of the cylindrical suction member and the outer surface of the float. A flow path is provided. According to this structure, it is possible to flow the float and the liquid sucked from the float suction portion from the flow path to the pump body.

  In the flotage removing device according to the above aspect, preferably, the flotage suction portion is provided in a plurality at substantially equal angular intervals in the circumferential direction of the cylindrical suction member. According to this structure, the floating matter can be efficiently sucked (removed) from the circumferential direction of the suction member in a balanced manner.

  In the configuration in which the floating matter suction portion includes the upper end portion disposed at the height position above the liquid surface and the lower end portion disposed at the height position lower than the liquid surface, preferably, the float is the floating matter suction portion The liquid level adjustment unit includes a liquid level adjustment unit that adjusts the height position of the float with respect to the surface, and the liquid level adjustment unit adjusts the height position of the float with respect to the float suction unit. It is configured to be adjustable in the vertical position. According to this structure, the adjustment operation of the liquid level can be facilitated as compared with the case where the plurality of floats are provided and the liquid level is adjusted for each float. In addition, compared to the case where the configuration for adjusting the liquid level is provided on the suction member side (below the liquid surface), the liquid level adjustment unit is provided on the float that floats and is exposed on the liquid surface. Therefore, also from this point, the adjustment operation of the liquid level can be facilitated.

  In the flotage removing device according to the aforementioned aspect, preferably, the groove-like flotage suction portion is formed so as to narrow in the downward direction. According to this structure, since the width on the upper side where the float is located is increased, the float can be effectively removed. On the other hand, since the width of the lower side where the liquid floating the float is located becomes smaller, it is possible to reduce the amount of the liquid sucked by the pump body. Therefore, the pump body can be made to work efficiently for sucking in the floating matter, not the liquid. Further, by forming the float suction portion so that the width narrows as it goes downward, the pump main body sucks when the pump main body starts operation after installing the float removal device in a predetermined area, and therefore the suction member The inner water level of the pump rises, but the open area of the float suction unit decreases accordingly, so the flow rate from the float suction unit decreases, and the suction amount of the pump body and the flow rate from the float suction unit Can be configured to be maintained and balanced at the same level. Furthermore, in the subsequent operation, when the suction amount of the pump body exceeds the inflow of the liquid to the suction member, the inner water level starts to decrease, but the open area of the floating material suction portion also increases, so the liquid to the suction member The inflow to the float is also increased, and the inflow to the float suction section is automatically adjusted to the fluctuation of the liquid level inside and outside the suction member, and the float and the liquid surface effectively float on the liquid surface. It is possible to maintain a state in which it can suck in the liquid.

  In this case, preferably, the groove-shaped float suction portion is formed in a V-shape in which the width narrows as it goes downward. According to this structure, the groove-like float suction portion can be formed with a simple shape.

  According to the present invention, as described above, the height position of the suction port capable of removing the floating matter can be stably maintained.

BRIEF DESCRIPTION OF THE DRAWINGS It is the side view of the partial fracture which showed the whole structure of the floating material removal apparatus by 1st Embodiment of this invention. It is the top view which showed the floating matter removal apparatus by 1st Embodiment of this invention. It is a figure for demonstrating the removal method of the floating matter of the floating matter removal apparatus by 1st Embodiment of this invention. FIG. 6 is a side view with a part broken away showing an overall configuration of a suspended matter removing device according to a second embodiment of the present invention. It is a side view of a partial fracture which showed the whole structure of the floating matter removal apparatus by the 1st modification of 1st Embodiment of this invention. It is a side view of a partial fracture which showed the whole structure of the floating matter removal apparatus by the 2nd modification of 1st Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described based on the drawings.

First Embodiment
(Configuration of floating matter removal device)
The configuration of a suspended matter removing apparatus 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  The floating material removal apparatus 100 shown in FIG. 1 is configured to be installed in a floating state in a liquid (for example, water or the like) stored in a predetermined area (for example, a storage tank or a reservoir). In addition, the floating matter removing device 100 is configured to remove the floating matter from the predetermined area by suctioning the floating matter in the vicinity of the liquid surface.

  The floating matter removing apparatus 100 includes a single float 1 including a liquid level adjustment unit 11, a suction member 2, and a pump body 3 separate from the float 1. The suction member 2 is connected to the float 1. In addition, the suction member 2 is fixedly connected to the pump body 3.

  The liquid level adjustment unit 11 is configured to adjust the height position of the float 1 with respect to the suction member 2 (floating material suction portion 22a described later of the suction member 2). The float 1, the suction member 2 and the pump main body 3 are configured to be movable relative to each other in the vertical direction by the liquid level adjustment unit 11. In short, the liquid level adjustment unit 11 has a function of adjusting the height position of the suction member 2 with respect to the liquid level.

<Structure of float>
The float 1 shown in FIG. 1 is made of, for example, a resin material (foam material), and has a vertically long oval shape. In detail, the float 1 includes a through hole 1 a which is disposed at the center of the float 1 in the horizontal direction and penetrates the float 1 in the vertical direction (Z direction). The float 1 generally has an elongated oval shape in a side view. That is, the float 1 is generally an ellipsoid whose longitudinal direction is in the vertical direction, and has a through hole 1a provided on a central axis line α extending in the vertical direction. The float 1 is configured to float on the liquid surface. The float 1 is capable of generating a buoyancy of a predetermined size or more capable of floating the floating material removal apparatus 100. The above oval shape in the present invention has a central axis line α as a symmetry axis, has a shape similar to an oval shape, an oval shape or an egg shape, and is a shape formed by a smooth curve. It is.

  By configuring the float 1 in such an oval shape, even if the float 1 is configured to have the same surface area as that configured in the spherical shape, a large amount of vertical displacement due to ups and downs when floating on the liquid surface can be taken. Since this can be performed, it is possible to easily adjust the position in the vertical direction when the float 1 floats. Further, by configuring the float 1 in such an oval shape, the horizontal size D1 of the float 1 can be configured smaller than the size in the vertical direction of the float 1. It can suppress that the suction member 2 becomes large in a horizontal direction.

  The horizontal size D1 of the float 1 is larger than the horizontal size of the pump body 3 (the size of the housing portion accommodating the motor 32) D2. That is, the pump main body 3 is configured to overlap the float 1 in the vertical direction substantially over the entire area.

  The float 1 is provided with a cylindrical guide member 12 disposed inside the through hole 1 a of the float 1.

  The guide member 12 has a round bar shape extending linearly in the vertical direction (Z direction). The guide member 12 has an outer diameter (diameter of the outer peripheral surface) slightly smaller than the inner diameter (diameter of the inner peripheral surface) of the through hole 1 a of the float 1. The guide member 12 is inserted into the through hole 1 a of the float 1. The guide member 12 and the through holes 1 a of the float 1 are configured to be slidable in the vertical direction. That is, the float 1 is configured to be guided in vertical movement by the guide member 12. The lower end of the guide member 12 is fixedly connected to the suction member 2.

  The liquid level adjustment unit 11 includes a shaft 110 and an upper limit position restriction unit 111 attached to the shaft 110.

  The shaft portion 110 is formed in a male-screw shape extending linearly in the vertical direction. The shaft portion 110 is provided to extend upward from the upper end of the guide member 12. The shaft portion 110 is fixedly connected to the guide member 12. That is, the shaft portion 110 and the liquid level adjustment portion 11 are fixedly connected to each other via the guide member 12. The shaft 110 is passed through the through hole 1 a of the float 1. It is thinner than the guide member 12 for guiding the movement of the float 1. An annular upper end 110 a is fixed to the upper end of the shaft 110. The upper end portion 110a moves when the floating matter removing device 100 is moored to restrict movement in the horizontal direction when the floating matter removing device 100 is installed on the liquid surface, or when the floating matter removing device 100 is lifted and moved When the floating material removal apparatus 100 is installed in a predetermined area, a rope is attached and used as a mooring for fixing the planar floating position of the floating material removal apparatus 100.

  The upper limit position restricting portion 111 is configured to adjust the float suction portion 22 a to a position straddling the liquid surface by adjusting the height position of the float 1 with respect to the float suction portion 22 a described later of the suction member 2.

  In detail, the upper limit position restricting portion 111 has a female screw hole penetrating in the vertical direction at the center. The upper limit position restricting portion 111 is attached to the shaft portion 110 by screwing. The upper limit position restricting portion 111 is configured to be able to adjust the position in the vertical direction with respect to the shaft portion 110 by changing the screwing position to the shaft portion 110. The upper limit position restriction unit 111 is provided on the upper side than the float 1. The upper limit position restricting portion 13 is formed to be larger than the through hole 1 a of the float 1 in the horizontal direction. The upper limit position restricting portion 111 abuts the float 1 floating by buoyancy from above in the use state in which the floating material removal apparatus 100 is installed on the liquid surface, whereby the float 1 against the guide member 12 (suction member 2) It is configured to regulate relative movement upward. In short, the upper limit position regulating unit 111 is a member that determines the position of the float 1 in the vertical direction. As a result of adjusting the position of the float 1 in the vertical direction by the upper limit position restricting portion 111, the height position of the suction member 2 (floating object suction portion 22a) relative to the float 1 can be adjusted.

  When the upper limit position restriction portion 111 is moved upward along the shaft portion 110, the float 1 moves upward with respect to the suction member 2. At this time, the suction member 2 moves downward with respect to the liquid level. On the other hand, when the upper limit position restricting portion 111 is moved downward along the shaft portion 110, the float 1 moves downward with respect to the suction member 2. At this time, the suction member 2 moves upward with respect to the liquid surface.

<Configuration of suction member>
The suction member 2 is disposed between the pump body 3 and the float 1 in the vertical direction. Further, the suction member 2 is connected to each of the pump body 3 and the float 1.

  The suction member 2 is generally formed in a vertically extending cylindrical shape. In detail, the suction member 2 is formed to surround the float 1 in plan view. In addition, the suction member 2 has a bowl shape in which the upper side is opened, and a through hole 21 extending downward is provided at an inner lower end. The through hole 21 is disposed so that a central axis line α of the float 1 extending in the vertical direction in the inside passes. The through hole 21 communicates at its lower end with the pump suction port 3 a of the pump body 3. The suction member 2 has a shape that is substantially line symmetrical with respect to the central axis α of the float 1 in a side view, except for a float suction portion 22a described later.

  The inner surface of the suction member 2 has a shape along the outer surface of the float 1. Between the inner surface of the suction member 2 (the first member 22 and the second member 23 described later) and the outer surface of the float 1, a flow path A of the float and liquid sucked from the float suction portion 22a is formed ing. One end of the flow path A is disposed in the vicinity of the liquid surface, and the other end is in communication with the internal space of the pump main body 3 through the through hole 21.

  The suction member 2 includes a first member 22 and a second member 23.

  The first member 22 is provided on the side of the float 1 so as to surround the float 1. The first member 22 is an annular cylindrical member extending in the vertical direction along the outer surface (a portion extending in the generally vertical direction of the outer surface) of the float 1. The upper end of the first member 22 is provided with a plurality (10) of floating material suction portions 22 a. The plurality of float suction units 22a are provided at substantially the same height.

  The floating matter suction portion 22a is a portion for taking the floating matter inside the suction member 2 by passing the floating matter from the outer peripheral portion to the inner peripheral portion of the suction member 2 (first member 22). The float suction portion 22 a is a groove-like portion which is cut downward from the upper end of the first member 22. That is, the float suction portion 22a is formed in a shape in which the width narrows as it goes downward. In detail, the float suction part 22a is formed in a V-shape (triangular shape) whose width is narrowed as it goes downward.

  The float suction portion 22a has an upper end 22b disposed at a height position higher than the liquid level and a lower end disposed at a height position lower than the liquid level in a use state where the float 1 is floated on the liquid surface And 22c. The lower end portion 22c is a corner portion located at the lowermost portion of the floating material suction portion 22a whose width is narrowed toward the lower side. The angle β of the corner portion of the lower end portion 22c is formed to be about 30 degrees.

  As shown in FIG. 2, a plurality of (ten) floating material suction portions 22 a are provided at substantially equal angular intervals (γ degrees (36 degrees)) in the circumferential direction of the upper end of the cylindrical first member 22. . In FIG. 2, for convenience of explanation, the upper end of the suction member 2 including the upper end portion 22 b of the floating matter suction portion 22 a is hatched, but this hatching does not indicate a cross section.

  As shown in FIG. 1, the second member 23 is disposed below the first member 22. The second member 23 is provided in the vicinity of the upper end, and has a step portion 24 in which the first member 22 is fitted. The second member 23 is provided below the float 1. The second member 23 has a curved inner surface along the lower outer surface of the float 1.

  The second member 23 (the suction member 2) includes a lower limit position restricting portion 25 which restricts the downward movement of the float 1.

  The lower limit position restricting portion 25 extends upward from the vicinity of the center of the second member 23 inside the second member 23, and its upper end is fixedly connected to the guide member 12. The lower limit position restricting portion 25 is disposed immediately below the float 1 and is configured to abut the lower end of the float 1 when the float 1 is directed downward. That is, the lower limit position restricting portion 25 is configured to restrict the downward movement of the float 1 and is a portion that determines the position of the float 1 in the vertical direction.

  The second member 23 (the suction member 2) includes a through hole 26a and a valve member 26b capable of opening and closing the through hole 26a. The through hole 26 a and the valve member 26 b are disposed at a position deviated from the central axis α of the float 1 in the horizontal direction.

  The through hole 26a is a hole portion communicating the inner region which is the region on the float 1 side of the second member 23 (the suction member 2) with the outer region which is the region on the opposite side to the float 1 side. The through hole 26 a is configured to transfer the liquid from the outer area of the suction member 2 to the inner area by opening the valve member 26 b when the float 1 is floated on the liquid surface. Then, the valve member 26 b is closed in a state where a predetermined amount of liquid is conducted to the inner region of the second member 23 (the suction member 2). The valve member 26 b is a valve that opens and closes based on the pressure difference between the inner area and the outer area. That is, when the internal region (inner side) of the second member 23 is empty (when the amount of liquid inside is small), the valve member 26b is opened, and the liquid flows into the internal region (inner side) of the second member 23 by a predetermined amount or more If so, the valve member 26b closes. Thus, when the floating material removal apparatus 100 is installed in a predetermined area, the liquid can be made to flow into the inner area of the second member 23, and the floating material removal apparatus 100 can be stably installed on the liquid surface.

  A plurality of (three) legs 27 are provided on the second member 23 (the suction member 2).

  The plurality of legs 27 are arranged to surround the pump body 3 in the horizontal direction. The legs 27 are formed in a rod shape extending in the vertical direction. The legs 27 extend below the lower end (motor 32 side) of the pump body 3. The plurality of legs 27 are configured to stably support the floating material removal apparatus 100 when the floating material removal apparatus 100 is placed on land (when not in use). That is, the legs 27 are configured to place the floating material removal apparatus 100 upright on land.

  A ball valve 28 is provided on the outer peripheral surface side of the second member 23 (the suction member 2).

  The ball valve 28 includes a floating valve body 281 having a spherical shape, and a cover member 282 having a vertically elongated internal space in which the floating valve body 281 is disposed inside.

  The floating valve body 281 is formed to float on the liquid in a predetermined area in which the floating material removal apparatus 100 is disposed. The cover member 282 is provided with a water passage hole 282a for water conduction to the internal space in which the floating valve body 281 is disposed, and is provided above the floating valve body 281, and the internal space of the cover member 282 and the region inside the suction member 2 And a vertically extending through hole 282b for communicating the

  When the floating valve body 281 is disposed below the liquid surface, the floating valve body 281 floats (moves the internal space upward) to close the through hole 282 b. That is, the liquid does not flow out of the suction member 2 through the through hole 282 b.

  On the other hand, when the floating valve body 281 is lifted above the liquid surface, the floating valve body 281 is configured to move downward (move down the internal space) to open the through hole 282 b. That is, the liquid is discharged to the outside of the suction member 2 through the through hole 282 b.

<Configuration of pump body>
The pump main body 3 shown in FIG. 1 is mainly formed of, for example, a resin material and a corrosion-resistant metal material such as stainless steel, and is a relatively lightweight pump. The pump body 3 is a submersible pump driven in a state of being disposed in the liquid. The pump body 3 is configured to generate a suction force for suctioning the floating matter in the vicinity of the liquid surface from the floating matter suction portion 22a. The pump body 3 is connected to the float 1 via the suction member 2 at a position directly below the float 1. The pump body 3 overlaps the float 1 in the vertical direction over substantially the entire area of the pump body 3. The pump body 3 is configured to be removable from the suction member 2 and to be replaceable with another output type pump. Although it is an example, pump main part 3 is mutually constituted exchangeably among various pumps of the output type of 150W, 250W, 350W, 450W, and 750W.

  The pump main body 3 includes a centrifugal impeller 31 and a motor 32 for applying a driving force to the impeller 31 via a rotation shaft 32 a. The rotating shaft 32a extends in the vertical direction. The impeller 31 is attached in the vicinity of the upper end (the pump suction port 3a side) of the rotation shaft 32a, and the motor 32 is disposed in the vicinity of the lower end of the rotation shaft 32a. The rotation shaft 32 a is disposed on the central axis α of the float 1 extending in the vertical direction.

  In the pump body 3, an impeller 31 is disposed inside, and a pump chamber 33 for transferring the sucked water (floating matter) from the pump suction port 3a to the pump discharge port 3b is provided. The pump suction port 3 a is provided on a central axis α passing through the center of the float 1 and the pump body 3 in the vertical direction. That is, the central axis of the pump body 3 extending in the vertical direction substantially coincides with the central axis α of the float 1 extending in the vertical direction. The pump suction port 3 a is provided directly below the center of the float 1. The pump discharge port 3 b is provided to face the side of the pump body 3 (direction substantially orthogonal to the Z direction).

  One end of a hose H is connected to the pump discharge port 3b from the side. The other end of the hose H is connected to, for example, a purification device provided on the ground. In the purification device, oil and water separation treatment of suspended matter, filtration treatment and the like are performed.

  Between the pump discharge port 3 b and the hose H, a packing-like start-up flow rate control valve 34 is provided. The start-up flow rate control valve 34 controls the maximum flow rate at start-up of the pump main body 3 to prevent the water level inside the pump suction port 3a from sharply decreasing and the whole apparatus rising largely.

  The start-up flow rate control valve 34 has a through hole communicating with the internal space of the pump body 3 through which the fluid passes and the internal space of the hose H, and has a plurality of tongues 34 a projecting to the inner peripheral side of the through hole. doing. The tongue portion 34a has a flexible structure, and in a state where it receives no external force due to the liquid before starting the pump main body 3, as shown by a broken line in FIG. It is formed to hold a changing shape.

  The tongue portion 34a is elastically deformed so as to warp from the pump body 3 side to the hose H side (the opposite side to that before the start) after the pump body 3 is started.

  The pump body 3 has a greater weight than the float 1 and the suction member 2. The pump body 3 is provided at a position directly below the float 1 and at the lower end of the entire apparatus. Therefore, the pump main body 3 tends to continue to be positioned immediately below the float 1 with respect to the float 1 floating on the liquid surface by its own weight. That is, the floating substance removing apparatus 100 is configured such that the pump main body 3 holds the mutual position of the pump main body 3 and the float 1 in the use state in which the float 1 is floated on the liquid surface and the entire apparatus becomes stable. It is done. As a result, the floating material removal apparatus 100 can exhibit the function of removing the floating material by suction.

<Method of removing suspended matter by suspended matter removal device>
Next, with reference to FIG. 1 and FIG. 3, the method (principle) of the removal of the float by the float removing apparatus 100 will be described.

  As shown in FIG. 1, the height position of the float suction portion 22a with respect to the liquid surface is adjusted by raising and lowering the height position of the float 1 with respect to the liquid surface by the liquid level adjustment unit 11. Specifically, the upper end portion 22b of the floating material suction portion 22a is disposed at a height position above the liquid surface, and the lower end portion 22c of the floating material suction portion 22a is disposed at a height position lower than the liquid surface. At this time, the liquid level adjustment unit 11 is adjusted so that the liquid level is positioned closer to the upper end 22b than the lower end 22c. Before the pump body 3 is driven, the water level on the inner peripheral side of the suction member 2 (inner water level) and the water level on the outer peripheral side of the suction member 2 (outer water level) are at the same height position.

  Then, the pump body 3 is driven. That is, the impeller 31 is rotated to generate a flow of the liquid including the suspended matter directed from the suspended matter suction portion 22 a to the pump chamber 33.

  As a result, as shown in FIG. 3, the inner water level starts to fall relative to the outer water level. That is, the open area of the float suction portion 22a that functions as the opening of the weir starts to increase. As the inner water level decreases relative to the outer water level, the inflow of liquid to the suction member 2 increases. That is, the amount of liquid passing through the groove-like float suction part 22a is increased by natural flow. The floating matter removing device 100 is vertically moved up and down by the drive of the pump body 3. Here, the above-mentioned open area is generally the area of the opening portion of the float suction portion 22a and the portion sandwiched between the inner water level and the outer water level in a side view.

  Then, the lowering of the inner water level stops at a position where the inner water level is lower than the outer water level by a predetermined height. That is, the flow rate (suction amount) of the pump main body 3 (see FIG. 1) and the inflow amount of the liquid passing through the float suction portion 22a are balanced, and the inner water level and the outer water level are maintained at a constant water level difference. Steady state. In the steady state, the upper end 22b is disposed above the liquid surface, and the lower end 22c is disposed below the liquid surface.

  As described above, by keeping the inner water level lower than the outer water level by a predetermined height, it is possible to keep the fluid including the suspended matter in the suction member 2 by natural flow (overflow). As a result, since a relatively high flow velocity can be generated in the vicinity of the liquid level around the float suction part 22a (the suction member 2), the float removal apparatus 100 can effectively remove the float. it can.

  Furthermore, even if a change occurs in the drive environment of the pump main body 3 such that the flow rate of the pump main body 3 changes thereafter, the inner water level is outside at a predetermined height range where the groove-like float suction portion 22a is provided. The steady state in which the inner water level and the outer water level are maintained at a constant water level difference is maintained by raising and lowering (the open area increases or decreases) with respect to the water level. For example, when the suction amount of the pump main body 3 exceeds the inflow of the liquid to the suction member 2, the inner water level starts to decrease, but the open area of the float suction portion 22a also increases, so the liquid to the suction member 2 The amount of inflow is also increased, and the amount of inflow to the floating material suction portion 22a is automatically adjusted also for the fluctuation of the liquid level inside and outside the suction member 2, and the floating material floating effectively on the liquid surface, It is possible to maintain the ability to suck in the liquid on the surface.

(Effect of the first embodiment)
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the tubular suction member 2 is provided with the groove-like float suction portion 22a for taking in the float by passing the float from the outer peripheral portion to the inner peripheral portion, The groove-like floating material suction portion 22a has a wider width in the height direction range in which the floating material can be removed, as compared with the case where the floating material is sucked in by the circularly shaped suction port upward. Therefore, the floating suction portion 22a can function as an opening of a weir that takes the floating into the inside of the suction member 2 by natural flow (overflow). As a result, it is possible to stably maintain the height position of the suction port capable of removing the floating matter. In addition, since the floating matter removing apparatus 100 includes the single float 1, the apparatus configuration can be simplified and the apparatus can be miniaturized as compared with the case where there are a plurality of floats 1. Further, compared to the case where there are a plurality of floats 1, the position adjustment of the floats 1 can be easily performed.

  Further, in the first embodiment, as described above, the floating suction portion 22a is provided with the upper end 22b disposed at a height higher than the liquid level and the lower end disposed at a lower height than the liquid level. And 22c. Thus, the floating matter can be taken into the inside of the suction member 2 by natural flow from a position higher than the lower end portion 22c, so that a relatively high flow velocity can be generated in the vicinity of the liquid surface. As a result, the floating matter can be sucked (removed) effectively. In addition, when a change in the drive environment of the pump body 3 occurs such that the flow rate of the pump body 3 changes, the water level inside the float suction portion 22a is changed to the lower end 22c in accordance with the change in the flow rate of the pump body 3. Therefore, it is possible to change the open area of the float suction portion 22a that functions as the opening of the weir. As a result, it is possible to balance the amount of liquid (floating matter) taken into the inside of the suction member 2 by natural flow and the flow rate of the pump body 3. In short, the flotage removing device 100 automatically follows (corresponds to) the fluctuation of the water level inside the float suction portion 22a caused by the change of the driving environment of the pump main body 3, and the fluid flow in the flotage removing device 100 Can be brought to a steady state. Thereby, before and after the change of the drive environment of the pump main body 3, it is possible to maintain the state where the suspended matter can be removed. When the flow rate of the pump main body 3 is increased due to a change in the driving environment of the pump main body 3, the water level inside the floating substance suction portion 22a is lowered relative to the lower end 22c (the open area of the floating substance suction portion 22a is increased) ). Conversely, when the flow rate of the pump main body 3 decreases due to a change in the driving environment of the pump main body 3, the water level inside the float suction part 22a rises relative to the lower end 22c (the open area of the float suction part 22a is Decrease.

  In the first embodiment, as described above, the cylindrical suction member 2 is formed so as to surround the float 1 in a plan view. As a result, since the suction member 2 is disposed around the float 1 in a well-balanced manner, the attitude of the entire device can be stably maintained.

  In the first embodiment, as described above, the inner surface of the cylindrical suction member 2 is formed in a shape along the outer surface of the float 1, and the inner surface of the cylindrical suction member 2 and the float 1 Between the outer surface, a flow path A of the floating matter is provided. Thereby, the floating matter and the liquid sucked from the floating matter suction portion 22a can flow from the flow path A to the pump main body 3.

  In the first embodiment, as described above, a plurality of floating material suction portions 22 a are provided at substantially equal angular intervals in the circumferential direction of the cylindrical suction member 2. Thus, the floating matter can be efficiently sucked (removed) from the circumferential direction of the suction member 2 in a balanced manner.

  In the first embodiment, as described above, the float 1 is provided with the liquid level adjustment unit 11 for adjusting the height position of the float 1 with respect to the floating material suction unit 22a, and the liquid level adjustment unit 11 is floated. By adjusting the height position of the float 1 with respect to the object suction portion 22a, the floating object suction portion 22a can be adjusted to the height position straddling the liquid surface. Thereby, compared with the case where the plurality of floats 1 are provided and the liquid level is adjusted for each float 1, the adjustment operation of the liquid level can be facilitated. Further, compared to the case where the structure for adjusting the liquid level is provided on the suction member 2 side (below the liquid surface), the liquid level adjustment unit 11 is provided on the float 1 floating and exposed on the liquid surface. Since it is provided, the adjustment operation of the liquid level can be facilitated from this point as well.

  Further, in the first embodiment, as described above, the groove-like floating material suction portion 22a is formed so as to narrow in width toward the lower side. As a result, since the width of the upper side where the float is located is increased, the float can be effectively removed. On the other hand, since the width of the lower side where the liquid floating the floating matter is located becomes smaller, the amount of the liquid sucked by the pump body 3 can be reduced. Therefore, it is possible to make the pump body 3 work efficiently for sucking in the floating matter, not the liquid. Further, by forming the float suction part 22a so that the width narrows as it goes downward, the pump main body 3 sucks when the operation of the pump main body 3 is started after the float removal device 100 is installed in a predetermined area. Since the inside water level of the suction member 2 rises because it does, the open area of the float suction part 22a decreases with it, the flow rate which flows in from the float suction part 22a decreases, and the suction amount of the pump main body 3; It can be configured to be maintained and balanced at the same level of flow rate from the float suction portion 22a. Furthermore, in the subsequent operation, when the suction amount of the pump main body 3 exceeds the inflow of the liquid to the suction member 2, the inner water level starts to decrease, but the open area of the floating material suction portion 22a also increases. The amount of inflow of liquid into 2 also increases, and the amount of inflow into the floating object suction portion 22a is automatically adjusted also to the fluctuation of the liquid level inside and outside the suction member 2, and the liquid effectively floats on the liquid surface. It is possible to maintain the float and the liquid level so that the liquid can be sucked.

  Further, in the first embodiment, as described above, the groove-shaped float suction portion 22a is formed in a V-shape in which the width is narrowed toward the bottom. Thereby, it is possible to form the groove-like float suction portion 22a in the shape of a triangular weir.

Second Embodiment
Next, a second embodiment will be described with reference to FIG. In the second embodiment, unlike the first embodiment in which the float 1 is disposed inside the suction member 2, an example in which the suction member 202 is disposed at an arbitrary position apart from the float 1 will be described. About the same composition as the 1st embodiment of the above, the same numerals are attached and illustrated in the figure, and the explanation is omitted.

(Configuration of floating matter removal device)
The floating material removal apparatus 200 according to the second embodiment of the present invention includes a suction member 202, as shown in FIG.

  The suction member 202 has a meandering tubular shape, and one opening is disposed in the vicinity of the liquid surface, and the other opening is in communication with the pump suction port 3 a of the pump body 3. Inside the suction member 202, a flow path A of the floating matter is formed. The suction member 202 is provided at one opening, and includes a groove-like float suction portion 22 a that takes in the float by passing the float from the outer peripheral portion to the inner peripheral portion. A plurality of (five) floating material suction portions 22a are provided at substantially equal angular intervals in the circumferential direction of one opening. The float suction part 22 a is provided on the one hand, and the opening is arranged around the float 1 at a distance from the float 1. The suction member 202 is disposed between the pump body 3 and the float 1 and connects the pump body 3 and the float 1 to each other. Further, in the second embodiment, the horizontal size (diameter) D3 of the suction member 202 (the cylindrical portion provided with the floating material suction portion 22a) is the horizontal size (diameter) D1 of the float 1 Is also small (D3> D1).

  The remaining structure of the second embodiment is similar to that of the aforementioned first embodiment.

(Effect of the second embodiment)
In the second embodiment, the following effects can be obtained.

  In the second embodiment, by providing the suction member 202 at an arbitrary position away from the float 1, the horizontal size (diameter) D 3 of the suction member 202 becomes the horizontal size (diameter) D 1 of the float 1. The floating material removal apparatus 100 can be configured even if the configuration is smaller than that.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

[Modification]
The embodiments (examples) disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is indicated not by the above description of the embodiment (example) but by the claims, and further includes all the modifications (modifications) within the meaning and range equivalent to the claims. .

  For example, in the first and second embodiments, the pump discharge port is directed to the side, but the present invention is not limited to this. In the present invention, the pump discharge port 303b may be configured to be directed downward, as in the floating material removal apparatus 300 of the first modified example of the first embodiment shown in FIG. In this case, one end of a pipe member (for example, a street elbow etc.) E having an L shape (a shape in which the directions of the one end opening and the other end opening are substantially orthogonal) is connected to the pump discharge port 303 b. The hose H may be attached to the side from the side.

  Moreover, although the example which formed the float longitudinally long was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the float 401 is formed in a spherical shape (a shape in which the size in the vertical direction is substantially equal to the size in the horizontal direction) as in the floating material removal apparatus 400 of the second modification of the first embodiment shown in FIG. You may Although not shown, the float may be formed in a shape in which the size in the vertical direction is smaller than the size in the horizontal direction.

  Further, in the first embodiment, ten floating material suction portions are provided on the suction member, and in the second embodiment, five floating material suction portions are provided on the suction member. However, the present invention is not limited thereto. Not limited to. In the present invention, the suction member may be provided with one or more and four or less, six or more and nine or less, or eleven or more floating substance suction portions.

  Moreover, although the example which provided the notch-like floating thing suction part in the suction member was shown in the said, 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the suction member may be provided with a through-hole-like float suction portion communicating the inside and the outside.

  Moreover, although the example which formed the float suction part in V shape was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the floating matter suction portion may be formed in a shape other than a V-shape such as a U-shape or a rectangular shape.

  In the first and second embodiments described above, the suction member is provided with the V-shaped floating material suction portion at 30 degrees. However, the present invention is not limited to this. In the present invention, the suction member may be provided with, for example, a V-shaped float suction portion other than 30 degrees and less than 90 degrees. It is more preferable to provide a V-shaped floating material suction portion less than 82 degrees.

  Moreover, although the example which provided the valve member for water conveyance and the through-hole in the said suction member was shown in the said 1st Embodiment, this invention is not limited to this. In the present invention, the suction member may not be provided with the valve member and the through hole for water conveyance. In this case, for example, water may be introduced from the upper opening of the suction member.

  Moreover, although the example which used the centrifugal-type impeller for the pump main body was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, an impeller other than a centrifugal type such as an axial flow type or a mixed flow type may be used for the pump body.

  Moreover, although the example which arrange | positioned so that the rotating shaft of the pump main body might be extended to an up-down direction was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, the rotational axis of the pump body may be arranged to extend horizontally or obliquely.

  Moreover, although the example which formed the float in the solid shape was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, for example, the float may be formed in a hollow shape.

  Moreover, although the example which comprised the suction member by two members, a 1st member and a 2nd member, was shown in said 1st and 2nd embodiment, this invention is not limited to this. In the present invention, for example, the suction member may be constituted by one member.

DESCRIPTION OF SYMBOLS 1, 401 float 2, 202 suction member 3, 303 pump main body 11 liquid level adjustment part 22a floating substance suction part 22b upper end part 22c lower end part 100, 200, 300, 400 floating substance suction device A flow path

Claims (8)

With a single float floating on the liquid surface,
A pump main body provided below the float and generating a suction force for suctioning the floating matter near the liquid surface;
A cylindrical suction member connected to the pump body and the float and separate from the float;
The said cylindrical suction member is a floating material removal apparatus containing the groove-like floating material suction part which takes in a floating material by letting a floating material pass from an outer peripheral part to an inner peripheral part.  The floatate removing device according to claim 1, wherein the floatate suction portion includes an upper end portion disposed at a height position above the liquid surface and a lower end portion disposed at a height position lower than the liquid surface. .   The flotage removing device according to claim 1, wherein the cylindrical suction member is formed to surround the float in a plan view. The inner surface of the cylindrical suction member has a shape along the outer surface of the float,
The floating matter removing device according to claim 3, wherein a flow path of a floating matter is provided between the inner surface of the cylindrical suction member and the outer surface of the float.   The floating material removal apparatus according to claim 3 or 4, wherein a plurality of the floating material suction parts are provided at substantially equal angular intervals in the circumferential direction of the cylindrical suction member. The float includes a liquid level adjustment unit that adjusts the height position of the float with respect to the float suction unit,
The liquid level adjustment unit is configured to be adjustable to a height position that straddles the liquid surface by adjusting the height position of the float with respect to the floating material suction portion. The floating matter removal apparatus as described in 2.   The flotage removing device according to any one of claims 1 to 6, wherein the groove-like float suction portion is formed to narrow in width as it goes downward.   The float removal apparatus according to claim 7, wherein the groove-like float suction portion is formed in a V-shape in which the width narrows downward.

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