JP6410443B2 - Aeration equipment installation base structure - Google Patents

Description

  The present invention relates to a structure for installing an air diffuser, and relates to a technique for fixing an air diffuser that generates buoyancy during air diffusion in a treatment tank.

  Conventionally, there are several methods for installing a membrane diffuser inside a treatment tank. For example, in the device described in Patent Document 1, a membrane-type air diffuser is a device in which a nozzle is mounted on a main body of a bag-like body extending in a strip shape and an air supply port provided on one outer edge of the bag-like body And is connected to an air supply source via a nozzle. The bag-like body is provided with insertion holes extending in the longitudinal direction of the bag-like body on both sides in the width direction, and the support member inserted into the insertion hole is fixed to the connection fixing portion. The nozzle is pressed and fixed to the connecting and fixing part with a fixing band, and the connecting and fixing part is fixed to the reaction tank with anchor bolts.

  Moreover, in what was described in patent document 2, an anchor apparatus consists of an anchor rod, a volt | bolt, a cable, etc., or these combination etc., and the peripheral part of a flexible aeration panel in a predetermined part of a flexible aeration panel It is attached directly to a predetermined part of an arbitrary structural frame located at the position.

  Moreover, in what was described in patent document 3, the diffused gas has a diffused substrate and a large number of small holes coated on one side thereof, and the peripheral portion is at the peripheral end of the diffused substrate. Since the air diffuser has a fixed air diffusion sheet and is provided at a substantially central portion in the plane direction of the air diffuser base, the air diffuser and the adapter are integrally fixed by screwing the screw portion and the male screw portion.

JP2010-104900 Special table 2009-513343 Utility Model Registration No. 3175355

  In the above configuration, buoyancy acts on the diffuser as air is blown, and in order to resist this buoyancy, a high tensile strength is required for the gantry. Moreover, the chloride ion density | concentration of sewage is high in the processing tank which installs a diffuser. For this reason, even when the gantry provided on the bottom of the treatment tank for installing the diffuser is made of SUS metal, deterioration due to corrosion of the metal material is observed.

  In order to confirm the presence or absence of deterioration, it is necessary to drain the sewage from the treatment tank every time the confirmation work is performed, which requires time and effort. When the pedestal deteriorates, it is necessary to remove all the air diffusers from the pedestal and to replace the heavy SUS-made pedestal, and there is a problem that it takes time to replace and install the pedestal.

  For this reason, it is considered to adopt a resin having excellent corrosion resistance as the material of the gantry, particularly fiber reinforced plastic FRP (Fiber Reinforced Plastics). However, FRP is strong in pulling in the direction of the fiber, but weak in pulling in the direction perpendicular to the fiber, and has anisotropy in strength. Therefore, when it is used for a frame, it counters the buoyancy acting on the diffuser. A structure is required. In addition, when using a molded product such as FRP drawing material for the frame, secondary processing such as joining is difficult because the drawing material contains a release agent, so only the resin is used. Even if the gantry is manufactured, the strength to withstand the buoyancy of the diffuser cannot be guaranteed.

  The present invention solves the above-mentioned problem, and provides an aeration apparatus installation gantry structure that can securely fix the gantry to the bottom surface of the treatment tank against the buoyancy of the aeration apparatus acting on the gantry. With the goal.

In order to solve the above problems, the aeration apparatus installation gantry structure of the present invention has a gantry body part having a mounting surface that supports the aeration apparatus in which buoyancy is generated during aeration, and the mounting surface of the gantry body part from the bottom of the tank. The installation base part made of a resin material, and the mounting body part and the leg part are integrated by pressing the mounting surface, and the treatment tank in which the air diffuser is installed is provided. Fixing means for fixing to the bottom of the tank , the gantry body part is made of a hollow body having an opening in the side part, the upper side part forming the mounting surface, the lower side part connected to the leg part, the upper side part and the lower side part It is characterized by having a standing side part to be connected .

In the diffuser installation frame structure of the present invention, the frame body part is formed of a molded product made of fiber reinforced plastic .
In the air diffuser installation frame structure of the present invention, in the air diffuser installation frame structure of the present invention, the fixing means comprises an anchor bolt that reaches the tank bottom surface from the mounting surface of the upper side through the frame main body part and the leg part. And

In the diffuser installation frame structure of the present invention, the diffuser is a membrane diffuser.
The treatment tank of the present invention includes any one of the above-described aeration device installation frame structures, and a plurality of aeration devices that generate buoyancy at the time of aeration are mounted on the mounting surface of the frame main body so as to resist buoyancy. It is characterized by.

  As described above, according to the present invention, the buoyancy generated during operation of the air diffuser acts on the mounting surface of the gantry body. With respect to this buoyancy, the fixing means presses the mounting surface and integrally fixes the gantry body and legs to the tank bottom of the treatment tank, so that the fixing means is a load-bearing material that counters the buoyancy of the diffuser. The load due to the buoyancy is received on the bottom surface of the processing tank through the gantry body and the load-bearing material fixing means without passing through the legs.

  When the gantry body part is composed of an upper side part, an upside part, and a lower side part, the load due to the buoyancy of the air diffuser acting on the upper side part of the gantry body part is via the standing side part, the lower side part, and further the leg part. Without any problem, it is received on the bottom surface of the processing tank through the upper side of the gantry main body and the fixing means of the load bearing material.

  Therefore, the load due to the buoyancy of the diffuser does not act on the joint between the gantry main body and the leg, and it is possible to prevent damage at the joint, and to secure a load bearing structure that resists the buoyancy of the diffuser. The structure can be simplified.

  In addition, because the installation base is made of resin material, corrosion resistance and light weight can be secured, corrosion of the base due to sewage in the treatment tank can be prevented, and workability of the base installation can be improved. .

The front view which shows the aeration apparatus installation mount structure in embodiment of this invention, and shows the installation stand part of an aeration apparatus The front view which shows the diffuser installation installation frame structure in the embodiment, and shows the installation installation frame part of a header The top view which shows the diffuser in the same embodiment Sectional drawing which shows various cross-sectional shapes of the gantry main-body part of this invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3, a membrane-type air diffuser 1 includes a bag-like body 2 that forms a main body that extends in a strip shape, and a nozzle 4 that is attached to an air supply port 3 provided on the outer edge of one side of the bag-like body 2. It has a structure that is connected to the air supply source via the nozzle 4. The shape of the bag-like body 2 may be any shape such as a balloon shape, a disc shape, a square shape, a rhombus shape, and a cylindrical shape.

  The bag-like body 2 is formed by joining sheet-like members 5 and 6 made of a synthetic resin of a soft elastic material to each other by welding. In this embodiment, the air-permeable sheet-like member 5 and the air-permeable sheet-like member ( The diffuser membrane 6 is made of polyurethane.

  The bag-like body 2 is composed of an air-permeable sheet-like member 5 on the lower surface portion, and the air-permeable sheet-like member 6 that forms the air-diffusing region 7 on the upper surface portion and air-impermeable air that forms the outer peripheral region of the air-diffusing region 7. Sheet-like member 5.

  The joining of the sheet-like members 5 and 6 is not limited to thermal welding or high-frequency welding, but can be performed by other fusion methods such as ultrasonic fusion or bonding, and mechanical means such as bolts can be used in combination. It is. The sheet-like members 5 and 6 are not limited to polyurethane, but may be made of other materials such as polyurethane reinforced with polyester fiber or nylon fiber, silicone rubber, ethylene propylene rubber.

  For example, when polyurethane is used for the air-permeable sheet-like member 6 that forms the air diffusion region, and polyurethane reinforced with polyester fiber or the like is used for the air-permeable sheet-like member 5 that forms the outer peripheral region of the air diffusion region 7. It is preferable because the welded portion and the portion for fixing the bag-like body to which force is applied during operation can be reinforced.

  In the present embodiment, the air diffusion region is provided only on the upper surface portion of the bag-like body 2, but the air diffusion region may be provided in other portions. Further, instead of the structure in which the air-permeable sheet-like member 6 is joined to the air-impermeable sheet-like member 5, a small hole is formed in a predetermined region of the air-impermeable sheet-like member 5 to form the air diffusion region 7. You may do it.

  The bag-like body 2 has an outer edge of the bag-like body 2 having a joint 8 formed by airtightly welding the air-impermeable sheet-like member 5 on the lower surface portion and the air-permeable sheet-like member 5 on the outer peripheral region of the upper surface portion. And a joint portion 9 formed by air-tightly bonding the air-permeable sheet-like member 6 on the upper surface portion and the air-impermeable sheet-like member 5 on the outer peripheral region to the entire periphery of the air-diffusing region 7. It is formed along.

However, it is also possible to use a plate-like member or a pipe-like member in place of the air-impermeable sheet-like member 5 on the lower surface portion, and the shape and properties thereof are not limited.
The nozzle 4 inserted into the air supply port 3 of the bag-like body 2 is airtightly joined to the air-impermeable sheet-like member 5 on the lower surface portion and the air-impermeable sheet-like member 5 on the upper surface portion at the welding portion 10. The air supply port 3 and the nozzle 4 are opened in a direction parallel to the sheet-like members 5 and 6. The position of the air supply port 3 may be a sheet on the upper surface or a sheet on the lower surface. Further, any shape of the nozzle 4 can be adopted, and the connection of the air supply source to the nozzle 4 may be performed from any angle such as upward, downward, and horizontal.

  In the present embodiment, as shown in FIG. 3, the bag-like body 2 is provided with insertion holes 11 extending in the longitudinal direction of the bag-like body 2 in the outer peripheral region of the air diffusion region 7 on both sides in the width direction. The member 12 is inserted into the insertion hole 11.

  The support member 12 is parallel to the longitudinal direction of the bag-like body 2, and is fixed to the installation base 20 of the membrane-type air diffuser 1 disposed on both ends in the axial direction of the support member 12. The installation gantry 20 constitutes the diffuser installation gantry structure of the present invention. In this embodiment, the installation gantry 20 is made of an FRP drawn material having excellent corrosion resistance, but a resin material of another material is used. It is also possible.

  The installation gantry 20 is provided on the bottom 22 of the treatment tank 21 in which the membrane diffuser 1 is installed. The gantry main body 24 having a mounting surface 23 that supports the membrane diffuser 1, and the gantry main body A leg portion 25 that lifts the mounting surface 23 of the portion 24 from the tank bottom surface 22 to a predetermined height position, and a pedestal portion 26 that forms a lower structure of the leg portion 25 and contacts the tank bottom surface 22 with a predetermined ground contact area. Yes. The gantry main body 24 has a sufficient length necessary for installing the plurality of membrane-type air diffusers 1, and leg portions 25 and pedestal portions 26 are arranged at predetermined plural positions of the gantry main body portion 24. ing.

  The FRP drawn material employed in the present embodiment has a U-shaped cross section as shown in FIG. 4A in a cross section perpendicular to the shaft center. The upper side part 24b which forms the mounting surface 23, the lower side part 24c connected to the leg part 25, and the standing side part 24d which connects the upper side part 24b and the lower side part 24c.

  The anchor bolt 27 that forms a fixing means is erected on the tank bottom 21a of the processing tank 21, and penetrates the base 26, the hollow 25a of the leg 25, the lower side 24c, the hollow 24d, and the upper 24b. Projecting on the mounting surface 23. When the nut 28 screwed into the anchor bolt 27 presses the mounting surface 23, the gantry body 24, the leg 25, and the pedestal 26 are integrally fixed to the tank bottom 21a by the anchor bolt 27 and the nut 28. Yes. The anchor bolt 27 can be made of a material other than metal.

  Auxiliary bolts 29 and nuts 30 are provided as restraining means at a predetermined plurality of locations of the gantry body 24, and the auxiliary bolts 29 and nuts 30 passing through the upper side 24b and the lower side 24c are connected to the upper side 24b and the lower side 24c. Are linked. A metal bolt, a resin bolt, an insulation lock, a circlip, a snap pin, a wire, or the like can be used as the restraining means.

  The support member 12 arranged on the mounting surface of the installation base 20 is fixed to the upper side 24 b of the installation base 20 by a U-shaped bolt 31 and a nut 32. This operation can be easily performed from the opening 24a on the side of the installation gantry 20.

  As shown in FIG. 2, the installation base 20 for installing the header pipe 33 connected to the nozzle 4 of the membrane diffuser 1 has a structure of only the base body 24, and the lower side 24 c contacts the tank bottom 22. They are installed in contact with each other, fixed to the tank bottom 21 a with a plurality of anchor bolts 27 and nuts 28, and the header pipe 33 is fixed to the gantry body 24 with U-shaped bolts 34 and nuts 35.

  Hereinafter, the operation of the above-described configuration will be described. During operation, air of a predetermined pressure is supplied from the air supply source (not shown) through the nozzle 4 and the air supply port 3 into the bag 2. During operation, the bag-like body 2 is inflated by the pressure of the air supplied to the inside, and air is blown out from the air diffusion region 7 through the air-permeable sheet-like member 6 forming the air diffusion film. Aeration occurs in the water to be treated.

  In addition, since the support members 12 arranged on both sides in the width direction of the bag-like body 2 support the bag-like body 2 over the entire length of the bag-like body 2 in the outer peripheral region of the air diffusion region 7, The bag-like body 2 can be held in a horizontally elongated state against the generated buoyancy, and the stress generated in the bag-like body 2 due to the buoyancy is dispersed over the entire length of the bag-like body 2 to form a bag-like shape. Damage to the body 2 can be prevented.

  Buoyancy generated during operation of the membrane diffuser 1 acts on the mounting surface 23 of the gantry body 24. For this buoyancy, the nut 28 screwed to the anchor bolt 27 of the fixing means presses the mounting surface 23, and the gantry body 24, the leg 25, and the pedestal 26 are integrally processed by the anchor bolt 27 and the nut 28. By fixing to the tank bottom surface 22 of the tank 21, the anchor bolt 27 of the fixing means acts as a load-bearing material that opposes the buoyancy of the membrane diffuser 1.

  For this reason, the load due to the buoyancy of the membrane-type air diffuser 1 acting on the upper side 24b of the gantry main body 24 does not go through the standing side 24d and the lower side 24c, and the legs and pedestals, but the gantry main body. 24 is received by the tank bottom 21a of the processing tank 21 through the upper side 24b of the load 24 and the anchor bolt 27 of a load bearing material.

  Therefore, the load due to the buoyancy of the membrane-type air diffuser 1 does not act on the joint between the gantry main body 24 and the leg 25 and the joint between the leg 25 and the pedestal 26 so that damage at the joint can be prevented. In addition, it is not necessary to secure a load-bearing structure that resists the buoyancy of the membrane-type air diffuser 1, and the structure can be simplified.

In particular, when a molded product such as an FRP drawn material is used for the gantry, the buoyancy of the air diffuser can be withstood even if the strength of the joint is insufficient due to the influence of the release material.
Further, when the membrane type air diffuser 1 is arranged in the section between the anchor bolt 27 and the anchor bolt 27, the buoyancy of the membrane type air diffuser 1 acts as a force for lifting the upper side portion 24b upward, and the upper side portion A load acts on the joint between 24b and the upright side 24d. However, since the upper side 24b and the lower side 24c are connected by the auxiliary bolt 29 and the nut 30, the proof strength of the gantry body 24 against a load caused by buoyancy is improved.

  Furthermore, since the installation base 20 is made of a resin material, corrosion resistance and light weight can be secured, corrosion of the base due to sewage stored in the treatment tank 21 can be prevented, and the installation of the base can be reduced. Workability can be improved.

  In the present embodiment described above, the mounting surface 23 of the gantry body 24 is directly pressed by the nut 28 that is screwed into the anchor bolt 27 that forms the fixing means. However, for example, a pair of anchor bolts 27 are arranged on both sides of the gantry main body 24, a holding member is arranged over both the anchor bolts 27, and the nut 28 is tightened to press the mounting surface 23 with the holding member. It is also possible to adopt a configuration in which various types of fixing means can be employed.

  Further, the structure of the gantry main body 24 may be, for example, a rectangular shape in cross section as shown in FIG. 4B, and further an E shape in cross section as shown in FIG. Also good.

DESCRIPTION OF SYMBOLS 1 Membrane type air diffuser 2 Bag-like body 3 Air supply port 4 Nozzle 5 Sheet-like member (impermeable)
6 Sheet-like material (breathability)
7 Aeration area 8, 9 Joining part 10 Welding part 11 Insertion hole 12 Support member 20 Mounting base part 21 Treatment tank 21a Tank bottom part 22 Tank bottom face 23 Mounting surface 24 Mounting base body part 24a Opening port 24b Upper side part 24c Lower side part 24d Standing Side part 25 Leg part 26 Base part 27 Anchor bolt 28 Nut 29 Auxiliary bolt 30 Nut 31 U-shaped bolt 32 Nut 34 U-shaped bolt 35 Nut

Claims (5)

For installation made of resin material, which has a gantry body part that has a mounting surface that supports the diffuser that generates buoyancy when diffused, and a leg part that lifts the mounting surface of the gantry body part from the tank bottom to a predetermined height position The gantry,
A fixing means for pressing the mounting surface and fixing the gantry main body part and the leg part integrally to the tank bottom surface of the processing tank in which the diffuser is installed,
The gantry body part is composed of a hollow body having an opening on the side part, and has an upper side part that forms a mounting surface, a lower side part connected to the leg part, and an upright part that connects the upper side part and the lower side part. A gantry structure with a diffuser. The diffusing device installation gantry structure according to claim 1, wherein the gantry main body portion is formed of a fiber reinforced plastic molded product.   The diffuser installation base structure according to claim 1 or 2, wherein the fixing means includes an anchor bolt that reaches the bottom surface of the tank through the base body part and the leg part from the mounting surface of the upper side part.   The diffuser installation frame structure according to any one of claims 1 to 3, wherein the diffuser is a membrane type diffuser.   5. The air diffuser installation base structure according to claim 1, wherein a plurality of air diffusers that generate buoyancy at the time of air diffusion are mounted on the mounting surface of the base frame body so as to resist buoyancy. A treatment tank characterized by that.

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