JPH022865A - Liquid aeration device - Google Patents

Abstract

PURPOSE:To uniformly install numbers of aerators by constituting a gas supplying pipe disposed on the bottom part of a liquid tank by connecting numbers of the segments of same shape, and fixing the aerators detachably to the above- mentioned segment. CONSTITUTION:The gas supplying pipe 18 disposed on the bottom part of the liquid tank is constituted by connecting the segments 20, 22 of practically same shape, and aerators 12, 14 are detachably fixed to the segment. The gas supplying pipe are preferably constituted of one or very small number of main pipes 16 of comparatively large diameter and plural branch pipes 18 of comparatively small diameter connected with the main pipe 16, and numbers of the above- mentioned segments constitute each branch pipe. As a result, numbers of arerators are allowed to be uniformly fixed even in the case of using one or very small number of gas supplying pipes, and the exchanging work when a pipe is broken is easily and cheaply carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a so-called aeration device or liquid aeration device that releases microbubbles into a liquid.

<Conventional technology> Such equipment is required in numerous processes.

For example, it is required for ammonia stripping and for dissolving oxygen in wastewater in sewage and industrial wastewater treatment. Such devices are often implemented by supplying a gas, for example air, to the bottom of a liquid tank. In order to create microbubbles with a diameter of about 1 to 2 mm, methods are known that use a perforated tube installed horizontally, or use a porous filter material or a plastic material with slits, but in recent years In general, a method of diffusing air using an aerator of any shape, such as a plate shape, a circular shape or a rectangular shape, generally called a diffuser, is widely adopted.

A plurality of ventilators are connected to a gas supply pipe disposed at the bottom of the liquid tank, and allow air supplied through the gas supply pipe to pass through the liquid in the tank as fine bubbles.

The conventional gas supply pipe consists of a number of parallel pipes extending in parallel, each having a length that matches the bottom area and shape of the liquid tank, and a plurality of aerators are evenly attached to each of the pipes.

<Problems to be Solved by the Invention> In the conventional device as described above, in order to install a large number of ventilators, it is necessary to install a corresponding number of pipes at the bottom of the liquid tank.

Furthermore, when the pipe is damaged, it is troublesome and expensive to replace it.

Therefore, an object of the present invention is to make it possible to install a large number of ventilators evenly while using one or a small number of gas supply pipes, and to easily and inexpensively replace pipes when they are damaged. It is to make it.

<Means for Solving the Problems> The above object of the present invention is to configure a gas supply pipe arranged at the bottom of a liquid tank by connecting a large number of substantially identical segments, and to connect the segments with an aerator. The solution is to configure the liquid venting device to removably attach the liquid vent.

The gas supply pipe preferably includes one or a very small number of relatively large-diameter main pipes and a plurality of relatively small-diameter branch pipes connected to the main pipe, each of which has a relatively large diameter. It is composed of a large number of the above segments.

<Operation> According to the present invention, one or a small number of relatively large-diameter gas supply main pipes are installed in one liquid tank, and a plurality of relatively small-diameter pipes are connected to the main pipe. It is branched. Branch tubes are constructed by articulating identical tubular segments. The tubular segment is, for example, a plastic injection molded part that can be manufactured in large quantities and at low cost. With such a configuration, the only design requirement for the individual liquid tank as an aeration device is that the main pipe be matched to, for example, the length of the liquid tank. A branch pipe can be formed by connecting a number of tubular segments depending on, for example, the width of the tank.

Each tubular segment has an internally threaded opening projecting in its radial direction to permit attachment of a ventilator having a corresponding externally threaded shank. Of course, any connection method such as connector connection or the like can be used to attach the ventilator. In order to maintain the desired direction of protrusion of the aerator, relative rotation between the segments and between the segments and the main pipe must be restricted. This is, for example, a so-called staggered joint (
This problem can be solved by forcibly locking the problem using, for example, groove-and-tongue.

Embodiment FIG. 1 shows a portion of a liquid venting device according to an embodiment of the present invention, in which at least one gas supply is arranged to extend along the bottom of a liquid tank (not shown). A plurality of branch pipes are derived from the main pipe 16. One of the branch pipes 18 is shown in the figure. Branch pipe 18
Each branch pipe containing a number of identical segments 20.2
It is composed of 2. Although not shown in the diagram,
Another branch pipe extending from the main pipe 16 to the opposite side of the branch pipe 18 is similarly constructed of a plurality of segments of the same shape. The main pipe 16 and the first segment 20 are joined via a joining support part 24 . Although the illustrated main pipe 16 has a cylindrical shape, it may have a rectangular cross section, in which case branch pipes are connected to opposite side walls.

Each segment 20.22 is preferably made of plastic injection molding. A penetrating rod 26 is used that extends through the segments to tightly join the segments to form the branch pipe 18. This penetrating rod 26 passes continuously through all the segments 20.22 of the illustrated branch pipe 18 and all the segments 20.22 of the non-illustrated branch pipe extending on the opposite side. Both outer ends of the penetrating rod 26 are fitted with a blind 7 which seals off the open end of the outermost end segment 22 of the branch pipe 18.
It is connected to the flange 30 and secured by fastening means such as a nut 28. By tightening the nut 28, each segment 20.22 constituting the branch pipe 18 is moved inward, that is, in the direction of the joint support 24, and the gas supply main pipe 16, the branch pipe 18, and each segment constituting the branch pipe 18 are moved inward, that is, in the direction of the joint support 24. are closely joined together. As shown in FIG. 3, an elastic member such as a disc spring 32, 34 can be sandwiched between the nut 28 and the blind flange 30, which will cause the gap between each segment 20, 22 to change due to temperature changes, etc. This helps ensure the tight bonding while dealing with differences in expansion and contraction that occur.

On each segment 20.22 is a plate-shaped ventilator 12.14.
are each removably attached.

To enable such attachment, each segment 1-20 is provided with a support 36,38 provided with a thread (not shown) in its inner diameter.
．． 22, and a ventilator 12.
14 is configured to be screwed onto a shaft portion 40° 42 extending downwardly. Details of this hollow cylindrical support 36 are shown in FIG. With such an arrangement, if, for example, the aerator 12 is damaged, the damaged aerator 12 can simply be removed from the segment 20 and replaced with a new, identical aerator, and the branch pipe 18 with each segment 20. can be easily repaired without having to separate it from the mains 16 or disassemble it.

Joint supports 24 are used to align the vents 12.14.
The first segment 20 and each segment 20.22 must be joined together so that they do not rotate relative to each other.

In the illustrated embodiment, this corresponds to the staggered joint 44, 46.
This is achieved by providing . FIG. 5 shows the configuration of this staggered joint in a plan view, and shows that in connecting adjacent segments 48, 50, an axial recess 54 provided in the end wall of the former and an end of the latter. Relative rotation is prevented by engagement with the axial protrusion 52 provided on the section wall.

FIG. 2 shows another embodiment of the segments constituting the branch pipe and the joints thereof in the ventilation device of the present invention. A disc member 60 is clamped at the joint between the segments 56, 58 according to this embodiment, and serves to guide the penetrating rod 26. Ventilation holes 62 and 64 are formed in the disc member 60, and the number and opening area of the ventilation holes are appropriately selected and determined in order to adjust the amount of air that should pass into the liquid. Although such means for adjusting the amount of ventilation is not shown in the embodiment shown in FIG. 1, it can be easily accomplished, for example, by attaching a diaphragm to the joints 44, 46. Sealing materials (not shown) such as seal rings or gaskets are attached to both sides of the disc member 60 to seal the joint between segments 1 and 56.58, thereby preventing the supply from the joint. Gas leakage is prevented.

The joint support portion 24, the segments, and the joints between the segments can be constructed as shown in FIG. 4. In this figure, the joints between the segments 66 and 68 are shown, but the end walls of these segments are integrally formed with flange portions 72.74, and the clamp portions 72.7
The two segments 66 and 68 are tightly joined together by surrounding the rim portions of the two segments 66 and 68 that protrude in opposite directions at the tips of the two segments 66 and 68 with a clamp 70.

The flange portions 72.74 may be annularly formed around the entire circumference of the segments 66.68.

FIG. 7 shows yet another connection configuration for connecting segments 76, 78. A clamp portion 80, 82 having an expanded diameter is integrally provided at the front end of each segment. Threads are carved on the outside of these flange portions, and when screwed together with the union nut 84, both 7 flange portions 80.82, and therefore both segments 76.78.
can be integrated, and the resulting joint is easily removable.

Yet another connection configuration, shown in FIG. 8, is by a so-called bayonet connector connection, in which the end of the segment 90 is formed with a bulge 88 forming a bushing for receiving another adjacent segment 86. are doing. Thus,
By simply inserting segment 86 into bulge 88, a tight joint can be achieved. Of course, tighter integration can be achieved by penetrating means such as the penetrating bar used in the embodiment shown in FIG.

The segment 92 shown in FIG. 9 is provided with means for removing any liquid that may be present therein, such as condensate. This means is configured such that a conical drain hole 94 is formed at the bottom of the segment 92, that is, the diameter gradually increases toward the outside, and this drain hole 94 is always closed from the outside by a spherical valve 96. It is what it is. An L-shaped projecting plate 10'O is formed at the bottom of the segment 92 at a position close to the drain hole 94, and a spring 98 is attached to this to constantly urge the valve 96 upward. When the segment 92 is filled with liquid and reaches a certain high pressure value, the valve 96 is pushed down against the force of the spring 98, thereby opening the drain hole 94 and allowing the liquid inside the segment 92 to flow outside. It is discharged. The valves constituting the liquid removal means may be of other types.

In the embodiments described above, the branch pipes branching from the main gas supply pipe are all composed of the same segments, but in some cases, various segments of different lengths may be prepared and used in appropriate combinations. By configuring the branch pipes, it is possible to change the interval between the aerators connected to each segment, and to adjust the length of the branch pipes according to the width and length of the liquid tank.

<Effects of the Invention> According to the liquid venting device of the present invention as described above, necessary piping work can be performed extremely easily, and replacement work in the event of damage can be performed easily and at low cost. It can also be used in common with various liquid tanks.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of a liquid venting device according to the present invention, FIG. 2 is a partial sectional view showing a modification of the connection structure between segments constituting a branch pipe of a gas supply pipe, and FIG. The figure is a partial sectional view showing the details of the structure at the end of the segment arranged at the end of the branch pipe, FIG. 4 is a partial sectional view showing a modification of the connection structure between the segments constituting the branch pipe, and The figure is a partial cross-sectional view showing details of the connection between the segments constituting the branch pipe shown in Figure 1;
FIG. 6 is a partial cross-sectional view showing details of the connection between the segments and the ventilator shown in FIG. 1, and FIG. 7 is a partial cross-sectional view showing still another modification of the connection configuration between the segments constituting the branch pipe. 8 is a partial sectional view showing yet another modification of the connection structure between the segments constituting the branch pipe, and FIG. 9 is a partial sectional view showing a segment to which a liquid removing means is attached. Explanation of symbols 12.14... Plate aerator 16... Gas supply main pipe 18... Branch pipe 20.22... Segment 24
... Connection support part 26 ... Penetration rod 28 ... Nut 30 ... Blind 7 lange 32.34 ... Disc spring 3
6.38...Hollow cylindrical support part 40.42...Hollow shaft part 44.46...Staggered joint part 48.50
... Segment 52... Convex part in the staggered joint 54... Concave part in the staggered joint 56.5
8... Segment 60... Disc member 62.64
...Vent hole 66.68...Segment 70...
Clamp 72°74...Flange part 76.78.
...Segment 80.82...Flange part 84.
...Union nut 86.90...Segment 88
... Swollen diameter part 92 ... Segment 94 ... Drainage hole 96 ... Spherical valve 98 ... Spring 100 ... Projection plate

Claims (9)

[Claims] (1) The gas supply pipe disposed at the bottom of the liquid tank is constructed by connecting a number of segments of substantially the same shape, and an aerator is removably attached to the segments. , a liquid aeration device for releasing microbubbles into a liquid. (2) The gas supply pipe is composed of one or a small number of relatively large-diameter main pipes and a plurality of relatively small-diameter branch pipes connected to the main pipe, and each of the branch pipes is Claim 1, characterized in that it is composed of a large number of said segments.
Liquid aeration device as described. (3) The liquid venting device according to claim 1 or 2, wherein the segment is a plastic injection molded product. (4) Claim 1, characterized in that means is provided for preventing the segments constituting the gas supply pipe from rotating relative to each other at their joint locations.
Or the liquid ventilation device according to 2. (5) The segments constituting the gas supply pipe or the branch pipe are held in a predetermined connected state by a penetrating member passing through the segments.
A liquid venting device according to claim 1 or 2. (6) Means for sealing the unconnected open ends of the segments constituting the end portions of the gas supply pipe or the branch pipe is provided, and the penetrating member extends through the sealing means. 6. The liquid venting device according to claim 5. (7) The liquid ventilation device according to claim 1 or 2, characterized in that the bottom of the segment is provided with a valve for discharging liquid that has entered the segment. (8) The liquid venting device according to claim 1 or 2, wherein a protrusion projecting in the radial direction is formed on the segment, and the aerator is attached to an open end of the protrusion. (9) Claim 1 or 2, wherein the gas supply pipe or the branch pipe is constructed by appropriately combining and connecting the segment and a second segment having a different length. Liquid aeration device as described.