JP4478950B2 - Bottom mud improvement / purification equipment - Google Patents

Description

  The present invention relates to an apparatus for improving and purifying a bottom mud layer deposited in, for example, a dam reservoir by using ultrafine bubbles (microbubbles), thereby improving and purifying water quality.

  In order to improve the dissolved oxygen by efficiently supplying oxygen to the bottom mud layer without destroying the water temperature stratification, ultrafine bubbles composed of oxygen-containing gas on the surface of the bottom mud deposited on the bottom of the water It is desirable to supply oxygen to the bottom mud from this ultrafine bubble layer. For this reason, the applicant of the present invention provides an oxygen gas generator that generates oxygen gas of a predetermined concentration and an oxygen gas that is disposed at a predetermined depth near the surface layer of the bottom mud deposited on the bottom of the water and supplied from the oxygen gas generator. Has already been filed for a bottom mud improvement / purification apparatus comprising an aerator unit having a plurality of aerators that injects the air in the horizontal direction as ultrafine bubbles (see Patent Document 1).

  In this earlier application, as a bottom mud improvement / purification device, a structure in which an aerator unit is connected to a lifting / lowering means such as a winding device provided on a mooring member moored on a water surface via a connecting wire so as to be lifted / lowered (the same document) Refer to FIG. 1: hereinafter referred to as the first conventional apparatus.) Also, as shown in FIG. 4, the aerator unit A is connected to a fixed weight B arranged on the bottom of the water, and the mooring member is used instead of the lifting means. One end side of a connecting wire E that is folded back via a pulley D fixed to C is connected to an aerator unit A, and the other end side of the connecting wire E is connected to a floating weight F suspended in water. A configuration in which the aerator unit A is arranged at a predetermined position in the water by the weight F (see FIG. 3 of the same document: hereinafter referred to as a second conventional device) is disclosed.

JP 2004-290893 A

  However, in the second conventional apparatus that arranges the aerator unit at a predetermined position in the water following the fluctuation of the water level, if the aerator unit is pulled up for maintenance and inspection, a connecting wire as in the first conventional apparatus is separately provided. However, since such a lifting device is always connected to the aerator unit via a connecting wire and forcibly raises and lowers the aerator unit, such a lifting device is provided. Then, the free movement of the connecting wire is hindered, and the function of the second prior art that keeps the aerator unit at a predetermined position in water following the water level fluctuation is hindered.

  The present invention has been made in view of the above-described circumstances, and is improved bottom mud capable of having both a forced raising / lowering function of the aerator unit and a function of fixing the aerator unit to a predetermined position in water regardless of fluctuations in the water level. The main problem is to provide a purification device.

In order to achieve the above object, a bottom mud improvement / purification apparatus according to the present invention includes an oxygen gas generator that generates oxygen gas of a predetermined concentration, and an oxygen gas that is disposed in water and supplied from the oxygen gas generator. And an aerator unit having a plurality of aerators that inject horizontally as superfine bubbles, and the aerator unit is connected to a fixed weight disposed on the bottom of the water and is rotatable to a mooring member moored on the water surface. It is connected to a winding device provided through a first connecting wire, and a levitation weight suspended in water is connected to the winding device through a second connecting wire. The other connecting wire can be pulled out while winding the connecting wire, and the winding device is connected to the mooring member via the hoisting device and the clutch mechanism. It is characterized in that so as to sintering (claim 1).

  Therefore, if the clutch mechanism is turned on to form a connection state between the winding device and the winding device, the movement of the winding device is restrained by the winding device, so that the winding device is driven by driving the winding device. The first connecting wire can be taken up by the take-up device, and the aerator unit can be forcibly pulled up. Moreover, if the clutch mechanism is turned off to release the connection state between the winding device and the hoisting device, the movement of the winding device is not restrained by the hoisting device. The winding device rotates so as to wind the wire and pull out the other connecting wire, and the aerator unit can be held at a certain height from the bottom of the water by the levitation weight.

  In the above-described configuration, the winding device is connected to the aerator unit at one end side and is connected to the other end side of the first connecting wire that is folded back via the pulley fixed to the mooring member. A drum and a first drum which rotates integrally with the first drum and is connected to the other end of the second connecting wire which is connected to the flying weight and is folded back via a pulley fixed to the mooring member. It may be configured by two drums (claim 2).

  In such a configuration, the first connecting wire is wound up, the drawing drum is wound up, and the second connecting wire is wound up, and the drawing drum is formed separately. There are no inconveniences.

  In the above-described configuration, the hoisting device includes a rotation driving unit that generates rotational power, and a speed reduction mechanism that can be connected to the rotation shaft of the winding device via the clutch mechanism, and the rotation driving unit. The rotational power transmitted from the vehicle may be transmitted through the speed reduction mechanism (claim 3).

  In such a configuration, the rotational power from the rotation driving means is transmitted to the winding device via the speed reduction mechanism, so that the aerator unit can be raised and lowered at a desired speed.

  Furthermore, a self-locking brake mechanism may be interposed between the rotation driving means and the speed reduction mechanism of the hoisting device (claim 4). A brake mechanism such as a screw brake or a worm brake may be used as the self-locking brake mechanism. In such a configuration, safety is ensured even if the rotation drive means is constituted by a manual drive mechanism such as an operation handle, etc., if the rotation of the handle is stopped, it is self-locked at that position by the self-lock brake. It becomes possible to do.

  As described above, according to the first aspect of the invention, the aerator unit is connected to the fixed weight disposed on the bottom of the water, and the first winding device is rotatably provided on the mooring member moored on the water surface. A lifting weight connected to a winding wire and suspended in water is connected to a winding device via a second connecting wire, and the winding device and the clutch mechanism provided on the mooring member are connected to the winding device. Since the coupling state between the winding device and the hoisting device can be formed and released by turning the clutch mechanism on and off, the forced lifting function of the aerator unit and the aerator unit can be It is possible to combine the function of fixing at a predetermined position.

  According to the invention of claim 2, the winding device is rotated integrally with the first drum, which is connected to the first connecting wire connected to the aerator unit, and the first drum, Since the second drum connected to the levitation weight is connected to the second drum to which the second connecting wire is connected, there is no inconvenience that each connecting wire is entangled, and the first connecting wire and the second connecting wire are eliminated. It is possible to ensure smooth interlocking.

  According to the invention of claim 3, the hoisting device includes the rotation driving means for generating the rotational power and the speed reduction mechanism connectable to the rotating shaft of the winding device via the clutch mechanism. Since the rotational power transmitted from the vehicle is transmitted via the speed reduction mechanism, the aerator unit can be moved up and down at a desired speed.

  According to the invention of claim 4, since the self-lock brake mechanism is interposed between the rotation drive means and the speed reduction mechanism of the hoisting device, the rotation drive means is constituted by a manual drive mechanism such as an operation handle. Even in such a case, it is possible to provide a self-locking function, and it is possible to ensure safety.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best embodiment of the present invention will be described below with reference to the accompanying drawings.

  In FIG. 1, the bottom mud improving / purifying device has an aerator unit 10 including a plurality of aerators 1 that generate ultrafine bubbles, and an oxygen gas generator 20 that supplies oxygen at a predetermined concentration to each aerator 1. Configured.

  The aerator unit 10 includes a pressure pump 2 that sucks and pressurizes bottom water, a pressure water pipe 3 to which pressure water pressurized by the pressure pump 2 is supplied, and an air supply tube from the oxygen gas generator 20 4 includes an air header 5 into which oxygen supplied through 4 flows in, and a plurality of aerators 1 into which oxygen supplied into the air header 5 flows in through air supply pipes 6.

  The pressure water pipe 3 functions as a frame of the aerator unit 10, and the pressure pump 2 and the air header 5 are fixed to the pressure water pipe 3, and 10 to several tens, in this embodiment, , 20 aerators 1 are fixed at predetermined intervals. The pressurizing pump 2 is driven by power supplied from a power source 35 installed on land.

  In the present embodiment, a cooling device 40 for cooling oxygen is installed between the oxygen generator 20 and the air header 5, and oxygen supplied from the oxygen generator 20 is supplied by the cooling device 40. The aerator unit 10 is cooled to a temperature approximately equal to the water temperature at which the aerator unit 10 is installed. Therefore, oxygen cooled by the cooling device 40 is supplied to each aerator 1 via the air supply tube 4, the air header 5, and the air supply pipe 6.

  The oxygen generator 20 generates oxygen gas having a predetermined concentration. In this embodiment, the oxygen generator 20 generates oxygen gas having a concentration of 95% or more by separating and removing nitrogen in the air supplied from the compressor 30. The oxygen gas is supplied to the aerator unit 10 through the air supply tube 4.

  Each aerator 1 forms oxygen supplied through the air supply pipe 6 into ultrafine bubbles having a diameter of 20 μm or less and injects water containing the ultrafine bubbles in the horizontal direction. The pressure water sucked into the pressure water pipe 3 is driven by the drive of the pressure pump 2, oxygen is introduced from the air supply pipe 6 by the negative pressure generated by the flow of the pressure water, and the gas liquid is discharged by the pressure water and oxygen. A swirl flow is generated, and a gas (oxygen) is atomized by a shearing force generated near the central axis of the swirl flow to generate a gas-liquid mixed phase flow containing ultrafine bubbles.

  When the installation depth of the aerator unit 10 is deep, oxygen cannot be sufficiently sucked only by the negative pressure generated by the flow of pressure water, so a compressor (not shown) is provided in the middle of the air supply tube 4; Oxygen may be forcibly supplied by this compressor. Further, the structure of the aerator 1 is not limited to the above-described configuration as long as it is a configuration that generates ultrafine bubbles having a predetermined diameter.

As shown in FIG. 2, the aerator unit 10 described above is connected to a fixed weight 7 disposed on the bottom of the water via a fixed wire 8, and is floated on the water surface and anchored on the shore. A rotatable winding device 50 fixed to the mooring member 9 is connected via a first connecting wire 11 so as to be movable up and down. Further, a levitating weight 13 is connected to the winding device 50 via a second connecting wire 12 so as to be movable up and down. The first connecting wire 11 and the second connecting wire 12 are configured such that when one connecting wire is wound around the winding device 50, the other connecting wire is pulled out from the hoisting device 50. The aerator unit 10 and the levitation weight 13 are connected to a winding device 50 via first and second connecting wires 11 and 12 that can be wound and pulled out. And this winding device 50
Is connected to the hoisting device 70 via a clutch mechanism 60 fixed to the anchoring member 9.

  Here, the levitation weight 13 has a weight that generates tension enough to cause the aerator unit 10 to float, and the total weight of the fixed weight 7 and the aerator unit 10 is heavier than the levitation weight 13. Is set. For this reason, when the aerator unit 10 and the floating weight 13 are suspended in water by the first and second connecting wires 11 and 12, the aerator unit 10 floats when the floating weight 13 sinks, but is fixed. When the wire 8 is fully extended, it stops, and even if the water surface position changes, the wire 8 is held at a certain height from the bottom.

  Specifically, as shown in FIG. 3, the winding device 50 is connected to the aerator unit 10 at one end side and is folded back via pulleys 14 and 15 fixed to the mooring member 9. A rotatable first drum 51 connected to the other end side of the wire 11, and the first drum 51 rotate integrally with the wire 11, and one end side is connected to the floating weight 13 and fixed to the mooring member 9. The second drum 52 is connected to the other end of the second connecting wire 12 that is folded back via the pulleys 16 and 17. The first drum 51 and the second drum 52 may be composed of drums having separate rotation shafts, but in the present embodiment, the first drum 51 and the second drum 52 are composed of double drums having a common rotation shaft.

  Various configurations of the clutch mechanism 60 are conceivable. In this embodiment, the clutch mechanism 60 is configured by an occlusal clutch that can mechanically form or release an engagement state by manually raising or tilting the operation lever 61. The hoisting device 61 and the winding device 50 are connected by standing up 61 to connect the hoisting device 70 and the winding device 50, and the operating lever 61 is tilted to release the biting state and the hoisting device 70 and the hoisting device. 50 is configured to leave.

  Further, the hoisting device 70 includes a rotation driving unit 71 that generates rotational power, a speed reduction mechanism 72 that can be connected to the rotation shaft of the winding device 50 via the clutch mechanism 60, a rotation driving unit 71, and a speed reduction mechanism 72. And a self-lock brake mechanism 73 composed of a screw brake, a worm brake or the like interposed between them. The rotational power transmitted from the rotation driving means 71 is transmitted via the self-lock brake mechanism 73 and the speed reduction mechanism 72. To communicate.

  The rotational driving means 71 generates rotational power, and may be one that automatically generates rotational power using an electric motor or the like, or that manually generates rotational power. In the embodiment, it is constituted by a manual operation handle 71 a assembled to the self-locking brake mechanism 73 so as to be rotatable.

  In the above-described configuration, when the operation lever 61 of the clutch mechanism 60 is erected (the clutch mechanism 60 is turned on) and the speed reducer 72 and the winding device 50 are connected (the hoisting device 70 and the winding device 50). Since the winding device 50 is connected to be rotated by the hoisting device 70, the movement of the winding device 50 is restrained by the hoisting device 70, and the operation handle. The aerator unit 10 can be lifted and lowered together with the fixed weight 7 by turning 71a. For this reason, it becomes possible to pull up the aerator unit 10 for a maintenance check or the like.

  On the other hand, when the operating lever 61 of the clutch mechanism 60 is tilted (the clutch mechanism 60 is turned off) and the connection state between the speed reducer 72 and the winding device 50 is released (the hoisting device 70 and the winding device 50). Since the movement of the winding device 50 is not restrained by the hoisting device 70, the winding device 50 can rotate according to the fluctuation of the water level position, and the aerator unit 10 is always kept constant from the bottom of the water. It becomes possible to arrange at the height of.

  That is, when the water surface position is lowered, the mooring member 9 is lowered, so that the second connecting wire 12 is pulled out from the second drum 52 and the floating weight 13 is lowered, and the tension for floating the aerator unit 10 is maintained. The first connecting wire 11 is wound around the first drum 51 so as to be bent, and the position of the aerator unit 10 from the water bottom is kept constant. Further, when the water surface position rises, the mooring member 9 rises, so that the weight of the fixed weight 7 pulls the first connecting wire 11 from the first drum 51 and maintains the tension for floating the aerator unit 10. In this way, the second connecting wire 12 is wound around the second drum 52 and the levitation weight 13 is raised, so that the position of the aerator unit 10 from the water bottom is kept constant.

  In this state, if a gas-liquid mixed phase flow containing ultrafine bubbles is ejected from each aerator 1, an ultrafine bubble layer 100 is formed so as to cover the surface layer of the bottom mud layer 90. Oxygen is supplied from the layer 100 to the bottom mud layer 90 to increase the dissolved oxygen in the bottom mud layer 90, and the bottom mud layer 90 can be improved and purified.

  Therefore, according to the above-described bottom mud improvement / purification device, the connected state between the winding device 50 and the hoisting device 70 can be formed / released by turning the clutch mechanism 60 on and off, so that the raising / lowering function of the aerator unit 10 and the aerator unit It is possible to combine the function of fixing 10 at a predetermined position in water regardless of the fluctuation of the water level.

  In particular, in the above-described configuration, the drum (first drum 51) that winds and pulls out the first connecting wire 11 and the drum (second drum 52) that winds and pulls out the second connecting wire 12. Are formed separately, so that there is no inconvenience of entanglement of the respective connecting wires, and smooth interlocking between the first connecting wire 11 and the second connecting wire 12 can be ensured. Further, since the rotational power from the rotation driving means 71 is transmitted to the winding device 50 via the speed reduction mechanism 72, the aerator unit 10 can be moved up and down at a desired speed. Further, since the self-lock brake mechanism 73 is interposed between the rotation drive means 71 and the speed reduction mechanism 72 of the hoisting device 70, the rotation drive means 71 is a manual drive mechanism such as the operation handle 71a as described above. Even when configured, the operation handle 71a is self-locked when the operation of the handle is stopped, so that safety can be ensured.

FIG. 1 is a diagram showing an overall configuration of a bottom mud improvement / purification apparatus according to the present invention. FIG. 2 is a schematic view showing an installed state of an aerator unit used in the bottom mud improving / purifying apparatus of the present invention. FIG. 3 is a view showing a winding device, a clutch mechanism, and a hoisting device installed on a mooring member of the bottom mud improvement / purification device according to the present invention, and (a) is a side view, ) Is a view from above. FIG. 4 is a schematic view showing an installation state of an aerator unit used in a conventional bottom mud improvement / purification device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aerator 7 Fixed weight 9 Mooring member 10 Aerator unit 11 1st connection wire 12 2nd connection wire 13 Weight for floating 20 Oxygen gas generator 50 Winding device 51 1st drum 52 2nd drum 60 Clutch mechanism 70 Hoisting device 71 Rotation drive means 72 Deceleration mechanism 73 Self-lock brake mechanism

Claims (4)

An oxygen gas generator that generates oxygen gas of a predetermined concentration, and an aerator unit that includes a plurality of aerators that are disposed in water and inject horizontally as oxygen particles supplied from the oxygen gas generator as ultrafine bubbles. In the bottom mud improvement / purification equipment
The aerator unit is connected to a fixed weight disposed on the bottom of the water and is connected to a rotatable winding device provided on a mooring member moored on the water surface via a first connecting wire, and is suspended in water. A weight is connected to the winding device via a second connecting wire, and the other connecting wire can be pulled out while winding the one connecting wire by the winding device, and the winding device is attached to the anchoring member. A bottom mud improving / purifying device characterized in that it is connected to a hoisting device provided through a clutch mechanism. The winding device has a rotatable first drum connected to the other end side of a first connecting wire that is connected to the aerator unit at one end side and is turned back via a pulley fixed to the mooring member. The first drum is rotated integrally with the first drum, and is connected to the other end of the second connecting wire which is connected to the floating weight and is turned back via a pulley fixed to the mooring member. The bottom mud improving / purifying device according to claim 1, wherein the bottom mud improving / purifying device is constituted by two drums. The hoisting device has a rotation driving means for generating rotational power, and a speed reduction mechanism that can be connected to the rotation shaft of the winding device via the clutch mechanism, and the rotational power transmitted from the rotation driving means. The bottom mud improvement / purification device according to claim 1 or 2, wherein the transmission is performed via the speed reduction mechanism. 4. The apparatus for improving and purifying bottom mud according to claim 3, wherein the hoisting device has a self-locking brake mechanism interposed between the rotation driving means and the speed reduction mechanism.

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