JP2005081239A - Device of installing underwater stirrer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation device which installs an underwater stirrer in a sewage treatment tank and which can be placed without discharging water in the tank to facilitate the whole installation work of the stirrer. <P>SOLUTION: An installation device 1 is provided with: first horizontal beams 4 laid on the upper face of the side walls 3A, 3B of the sewage treatment tank 3; second horizontal beams crossing with the first beams 4; supporting posts 12 extending downward from the first beams 4 and second beams; and a supporting plate 14 provided at the lower end of the posts 12. The installation device 1 is fixed to a part above the water level 13 of the tank 3. The underwater stirrer 2 is suspended along the posts 12 to allow installation of the stirrer 2 on the supporting plate 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for installing an underwater agitator.

  Conventionally, in a sewage treatment plant, a water storage, etc., for biological treatment such as an oxidation ditch, an underwater mixer has been installed in the water tank, and the sewage can be purified while being stirred or conveyed by the underwater mixer. Has been done.

  By the way, the submerged mixer requires appropriate maintenance, and the submerged mixer must be lifted from the water tank during the maintenance. In addition, after the maintenance is completed, it is necessary to install the underwater mixer in the water tank again. Then, what was provided with the raising / lowering guide which guides raising / lowering of an underwater mixer as an installation apparatus of an underwater mixer is proposed (for example, refer patent document 1 and 2).

  With reference to FIG. 9, an example of a conventional installation apparatus provided with a lifting guide will be described. This installation apparatus 100 is comprised from the support | pillar 105 extended in an up-down direction in a water tank, and the fixing metal fittings 103 and 104 which fix the support | pillar 105 to the bottom wall 101 and the side wall 102 of a water tank. The underwater mixer 110 includes a support plate 112 that engages with the support column 105. A chain 111 is attached to the underwater mixer 110.

Since the installation apparatus 100 has the above-described structure, the operator can easily install the underwater mixer 110 in the water tank by hanging the chain 111 with the support plate 112 engaged with the support column 105. Can do. In maintenance, the underwater mixer 110 can be easily pulled out of the water tank by pulling the chain 111 upward. Therefore, installation and maintenance of the underwater mixer 110 can be performed easily and quickly.
JP 2002-346359 A (page 4, FIG. 7) Japanese Examined Patent Publication No. 7-4596 (page 4, FIG. 1)

  However, in the installation apparatus 100, it is necessary to fix the column 105 to the bottom wall 101 and the side wall 102 of the water tank via the fixing brackets 103 and 104 before installing the underwater mixer 110 in the water tank. That is, the installation work of the support | pillar 105 in a water tank was required.

  However, if the water 120 is stored in the water tank, installation work in the water tank is difficult. Therefore, in order to perform the installation work in the aquarium, it was necessary to drain the water 120 in the aquarium in advance and empty the aquarium. Therefore, in the conventional installation apparatus 100, even if the installation work itself of the underwater mixer 110 can be simplified, the installation work of the installation apparatus 100 itself is a troublesome and time-consuming work. In particular, when the water tank is a sewage treatment tank, the water tank needs to be cleaned prior to installation of the installation apparatus 100. For this reason, the installation work of the installation apparatus 100 takes time and labor. Therefore, when installing the submerged mixer 110, it was difficult to say that the entire work including the installation work of the installation apparatus 100 has been sufficiently simplified. In addition, such a subject is a subject common not only to an underwater mixer but the whole of an underwater agitator.

  The present invention has been made in view of the above points, and an object of the present invention is to facilitate the installation work of the installation apparatus itself and to simplify the entire installation work of the underwater agitator.

  An installation device for an underwater agitator according to the present invention is an installation device for installing an underwater agitator in a sewage treatment tank, the beam being fixed at a location on the water surface of the sewage treatment tank, and the sewage treatment tank A column that is supported in a suspended state on the beam without being fixed to a location below the water surface, and extends below the water surface, a support member that is provided at a location below the water surface of the column and supports the underwater agitator, It is equipped with.

  Here, the “location on the water surface” means a location higher than the water surface of the sewage treatment tank, and is not limited to a location directly above the water surface.

  In the above installation apparatus, it is not necessary to provide a fixture or the like at a location below the water surface of the sewage treatment tank, so that construction under the water surface is unnecessary. Therefore, when installing the installation apparatus, it is not necessary to discharge water from the sewage treatment tank, and cleaning work for the sewage treatment tank is not required. Therefore, the installation work of the installation device is facilitated.

  It is preferable that the support column is configured to guide its up and down by engaging with the underwater agitator when the underwater agitator is installed.

  This makes it possible to easily install the underwater agitator at a predetermined position simply by lowering the underwater agitator along the support column. Thus, according to the installation apparatus, the installation operation of the installation apparatus itself can be facilitated, and the underwater agitator can be easily installed at a predetermined installation position.

  The beam may be bridged from one side wall of the sewage treatment tank to the other side wall. The sewage treatment tank may include a lid in which an opening is formed, and the beam may be fixed to the lid.

  Thus, the said beam can be installed in various aspects, and this installation apparatus can be applied to various forms of sewage treatment tanks.

  The sewage treatment tank may be a sewage circulation treatment tank that circulates sewage, and the underwater agitator may be an underwater mixer.

  Thus, for example, when performing sewage treatment by the oxidation ditch method, the installation work of the installation apparatus is facilitated, and the entire installation work of the underwater mixer is simplified.

  As described above, according to the present invention, it is not necessary to provide a fixture or the like for installing the installation device at a location below the surface of the sewage treatment tank, so that construction under the surface of the water can be omitted. Therefore, it is not necessary to discharge the sewage from the sewage treatment tank when installing the installation apparatus, and it is not necessary to clean the sewage treatment tank, so that the installation apparatus can be easily installed.

  Further, by configuring the support column to guide the raising and lowering of the underwater agitator, the underwater agitator can be set in a predetermined manner by a simple operation of lowering the underwater agitator along the support column and placing it on the support member. Can be easily installed in position. Therefore, the installation work of the underwater agitator can be facilitated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, the installation device 1 according to the embodiment is a device for installing the underwater mixer 2 inside the sewage treatment tank 3. As shown in FIG. 5, in this embodiment, the sewage treatment tank 3 is a so-called circulation type water tank that purifies the sewage while circulating it (note that the installation device 1 and the underwater mixer 2 are not shown in FIG. 5). ) The sewage treatment tank 3 is composed of four linear water channels 10 extending in parallel to each other and a curved water channel 11 connecting the ends of the linear water channels 10. The installation apparatus 1 according to the present embodiment is installed in the straight water channel 10. However, the installation location of the installation apparatus 1 is not limited at all, and it is of course possible to provide the installation apparatus 1 in the curved water channel 11. The sewage in the sewage treatment tank 3 is circulated by the underwater mixer 2 and subjected to sewage treatment by the oxidation ditch method.

  As shown in FIG. 3 and FIG. 4, the installation device 1 includes a pair of front and rear first horizontal beams 4 spanning from one side wall 3A of the water channel 10 of the sewage treatment tank 3 to the other side wall 3B, and a first horizontal beam 4. And a pair of left and right second horizontal beams 5 spanned between the two. The second horizontal beam 5 is inclined from the flow path direction. However, the 2nd horizontal beam 5 should just cross | intersect the 1st horizontal beam, and of course may extend in parallel with the flow-path direction. In this embodiment, the sewage treatment tank 3 is made of concrete, and the first transverse beam 4 and the second transverse beam 5 are made of stainless steel. The first horizontal beam 4 is fixed to the upper surfaces of the side walls 3A and 3B of the sewage treatment tank 3 by a fixture (not shown) such as an anchor bolt. The second transverse beam 5 is fixed to the middle portion of the first transverse beam 4 by a fixing tool (not shown) such as a bolt. However, the materials of the sewage treatment tank 3 and the horizontal beams 4 and 5 are not particularly limited, and materials other than those described above can be used. The 2nd cross beam 5 may be joined to the 1st cross beam 4 without using a fixture, and the 1st cross beam 4 and the 2nd cross beam 5 may be an integral thing. The number of the first horizontal beams 4 or the second horizontal beams 5 is not limited to two, and may be one or three or more.

  As shown in FIG. 4, a flat plate 6 that partially closes the upper side of the flow path of the sewage treatment tank 3 is provided above the first horizontal beam 4 and the second horizontal beam 5. An opening 7 larger than that of the underwater mixer 2 is formed in the central portion of the flat plate 6 in the left-right direction. A flat plate 8 is provided in front of the flat plate 6. The flat plate 8 is spanned from one side wall 3A of the sewage treatment tank 3 to the other side wall 3B, and is used as a work table for providing a work space for the operator when the submerged mixer 2 is installed or maintained. Is. Fences 9 are respectively provided in the vicinity of the rear first transverse beam 4 and the front side of the flat plate 8.

  FIG. 6 shows a cross section of the first transverse beam 4. The upper part of the first transverse beam 4 is formed in a concave shape. That is, a groove-shaped guide rail 20 is formed on the first transverse beam 4. As described above, since the first horizontal beam 4 extends from the one side wall 3 </ b> A of the water channel 10 to the other side wall 3 </ b> B, the guide rail 20 is formed over the entire width of the water channel 10.

  As shown in FIGS. 1 and 2, the first transverse beam 4 and the second transverse beam 5 are provided with a plurality of support columns 12 extending downward. The lower end of the support column 12 is located above the bottom wall 3C of the sewage treatment tank 3, and a gap is left between the support column 12 and the bottom wall 3C. However, the column 12 is not required to be fixed to the bottom wall 3C, and the lower end of the column 12 may be in contact with the bottom wall 3C as long as the operation of the underwater mixer 2 is not hindered.

  The underwater mixer 2 is provided with a guide member 21 having a substantially U-shaped cross section that engages with the support column 12. When the operator suspends or lifts the underwater mixer 2, the guide member 21 engages with the front column 12, and the underwater mixer 2 is prevented from shaking in the lateral direction. Thus, the front column 12 is also used as a lifting rail for guiding the raising and lowering of the underwater mixer 2.

  A support plate 14 is attached to the lower end of the column 12. The underwater mixer 2 suspended along the column 12 is installed on a predetermined position by being placed on the support plate 14.

  Next, installation work of the underwater mixer 2 will be described.

  In the installation work of the submersible mixer 2, for example, a portable simple crane 30 as shown in FIG. The simple crane 30 includes a winch 38 having a drum 32 and a handle 34, a frame 37 that supports the winch 38, four legs 31 fixed to the lower part of the frame 37, and casters 33 attached to the lower ends of the legs 31. And. A wire 35 is wound around the drum 32. However, instead of the wire 35, other winding means such as a chain or a rope can be used. A shackle 36 for attaching the underwater mixer 2 is provided at the tip of the wire 35.

  In the installation work, first, the shackle 36 is attached to the underwater mixer 2, the handle 34 is rotated, and the wire 35 is wound up to slightly lift the underwater mixer 2. As a result, the simple crane 30 can travel while holding the underwater mixer 2.

  Next, the operator places the casters 33 on the guide rails 20 of the first transverse beams 4 while pushing the simple crane 30. Then, the simple crane 30 is caused to travel along the first transverse beam 4 and is moved to a position directly above the opening 7 of the flat plate 6. The position directly above the opening 7 corresponds to a position directly above the installation position of the underwater mixer 2.

  Next, the operator rotates the handle 34 of the simple crane 30 and gradually hangs the wire 35. As a result, the underwater mixer 2 slowly descends, and the guide member 21 of the underwater mixer 2 engages with the column 12. The worker further rotates the handle 34 in this state. Then, the underwater mixer 2 is further lowered while being guided by the support column 12 and placed on the support plate 14. As a result, the underwater mixer 2 is installed at a predetermined installation position.

  Thereafter, the wire 35 is removed from the drum 32 and the wire 35 is wound around a predetermined portion of the sewage treatment tank 3. Then, the simple crane 30 is caused to travel along the guide rails 20 of the first transverse beam 4 and is moved to the outside of the sewage treatment tank 3. Thereby, the installation work of the underwater mixer 2 is completed.

  During maintenance of the underwater mixer 2, the underwater mixer 2 is lifted from the inside of the sewage treatment tank 3 and moved to the outside of the sewage treatment tank 3 by a procedure reverse to the above-described procedure.

  As described above, the installation device 1 according to the present embodiment is fixed at a position on the water surface of the sewage treatment tank 3 by fixing the first horizontal beam 4 to the upper surfaces of the side walls 3A and 3B of the sewage treatment tank 3. ing. Therefore, since it is not necessary to attach a fixing tool to the location under the water surface of the sewage treatment tank 3, when the installation device 1 is installed, construction under the water surface is unnecessary. Therefore, when installing the installation apparatus 1, it is not necessary to discharge | emit the water in the sewage treatment tank 3, and the cleaning of the sewage treatment tank 3 is also unnecessary. Therefore, the installation apparatus 1 can be easily installed.

  Since the support column 12 that supports the underwater mixer 2 can be used as a lifting rail, the underwater mixer 2 can be prevented from swinging when the underwater mixer 2 is lifted or suspended. As a result, installation and maintenance work of the underwater mixer 2 can be easily performed.

  By simply placing the underwater mixer 2 on the support plate 14, the underwater mixer 2 can be easily installed at a predetermined position. In other words, the underwater mixer 2 can be accurately installed at a predetermined position by a simple operation of simply suspending the underwater mixer 2 along the support column 12.

  By a simple operation of simply traveling the simple crane 30 along the guide rail 20 of the first cross beam 4, the position of the opening 7 of the flat plate 6 (that is, the position of the opening 7 of the flat plate 6 (that is, FIG. 1)) The submersible mixer 2 can be easily moved to a position just above the installation position. Therefore, a dedicated lifting column for moving the underwater mixer 2 from the outside of the sewage treatment tank 3 to the position of the opening 7 becomes unnecessary. Therefore, the installation apparatus can be reduced in size.

  Since the movement range of the simple crane 30 is large, the workability of installation or maintenance of the underwater mixer 2 can be improved.

  Further, unlike the case of moving using the lifting column, the underwater mixer 2 mounted on the simple crane 30 only moves linearly in one direction along the guide rail 20, so that the operator can easily move the underwater mixer 2. Can be grasped, and workability and safety are improved.

  Further, since the guide rail 20 has a concave cross section, the caster 33 of the simple crane 30 is difficult to drop off from the guide rail 20. Therefore, it is possible to effectively prevent the simple crane 30 from falling off, and it is possible to easily perform installation or maintenance work. In addition, safety is improved.

  Since the 1st cross beam 4 exhibits the function as a structural material which supports the support | pillar 12 and the underwater mixer 2, and the function as a guide member which guides the simple crane 30, a beam and a guide rail are formed with a separate member. Compared to the case, the number of parts can be reduced.

  In the above embodiment, the underwater mixer 2 is used as the underwater agitator, but the underwater agitator installed by the installation device 1 is not limited to the underwater mixer 2. The underwater agitator may be an aerator or the like.

  The flat plate 6 is not always necessary, and the flat plate 6 can be omitted. Further, the flat plate 8 may be omitted if the worker can perform a predetermined work without the flat plate 8.

  Since the guide rail 20 of the first transverse beam 4 is formed over the entire width of the water channel 10, the simple crane 30 can be freely moved over the entire width of the water channel 10. Therefore, the installation position can be set to an arbitrary position.

  The guide rail 20 may be provided only on a part of the first transverse beam 4. As long as the guide rail 20 is provided from one side wall 3A of the sewage treatment tank 3 to a position directly above the installation position, the above-described effects can be obtained.

  The configuration of the simple crane 30 is not limited to the above-described configuration, and various modifications are possible. The traveling means of the simple crane 30 is not limited to a caster, and may be a roller or the like. The simple crane 30 and the guide rail 20 may be provided with engaging means that can slide with respect to each other, and the simple crane 30 may move while sliding on the guide rail 20.

  The sewage treatment tank to be installed by the installation apparatus 1 is not limited to the circulation-type sewage treatment tank 3, and may be another type of sewage treatment tank. The method of sewage treatment is not limited to the oxidation ditch method. The 1st cross beam 4 of the installation apparatus 1 does not need to be spanned between the side walls of a sewage treatment tank, may be fixed only to one side wall, and may be supported in the cantilever state.

  As shown in FIG. 8A, the sewage treatment tank may be provided with a lid 41 having an opening 40, and the first horizontal beam 4 may be bridged in the horizontal direction so as to straddle the opening 40. Further, as shown in FIG. 8B, the first horizontal beam 4 may be provided along the edge of the opening 40.

  In addition, when the underwater mixer 2 can be supported only by the 1st cross beam 4, the 2nd cross beam 5 is also omissible.

  As described above, the present invention is useful for an installation device or the like for installing an underwater mixer in a sewage treatment tank.

It is a front view of an installation apparatus. It is a side view of an installation apparatus. It is a top view of an installation apparatus. It is a perspective view of an installation apparatus. It is a perspective view of a sewage treatment tank. It is sectional drawing of a 1st cross beam. It is a side view of a simple crane. (A) And (b) is a top view which shows the modification of the attachment aspect of an installation apparatus, respectively. It is a perspective view of the conventional installation apparatus.

Explanation of symbols

1 Installation equipment 2 Underwater mixer (underwater stirrer)
3 Wastewater Treatment Tank 3A, 3B Side Wall of Wastewater Treatment Tank 4 First Cross Beam 5 Second Cross Beam 6 Flat Plate 7 Opening 12 Column 13 Water Surface 14 Support Base (Support Member)
20 guide rail 21 guide member 40 opening 41 lid

Claims (5)

An installation device for installing an underwater agitator in a sewage treatment tank,
A beam fixed to a location on the water surface of the sewage treatment tank;
A column that is supported in a suspended state by the beam without being fixed at a location below the water surface of the sewage treatment tank, and extends below the water surface;
A support member provided at a position below the water surface of the support column and supporting the underwater agitator;
A device for installing an underwater agitator.   The said support | pillar is an installation apparatus of the submerged stirrer of Claim 1 comprised so that the raising / lowering may be guided by engaging with the said submerged stirrer in the case of the installation of the said submerged stirrer.   The apparatus for installing an underwater agitator according to claim 1 or 2, wherein the beam is stretched from one side wall of the sewage treatment tank to the other side wall. The sewage treatment tank includes a lid in which an opening is formed,
The apparatus for installing an underwater agitator according to claim 1 or 2, wherein the beam is fixed to the lid. The sewage treatment tank comprises a sewage circulation treatment tank for circulating sewage,
The underwater agitator installation device according to any one of claims 1 to 4, wherein the underwater agitator comprises an underwater mixer.

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