JP3734171B2 - Air diffuser or mount member used in septic tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air diffuser used in a septic tank such as a contact aeration tank or a mount used in the septic tank.
[0002]
[Prior art]
In general, domestic wastewater is composed of human waste and miscellaneous wastewater, which are treated and discharged. The wastewater treatment is roughly classified into a physical method, a biological method, and a chemical method.
[0003]
This biological method includes an aerobic treatment and an anaerobic treatment, and these aerobic methods are classified into an activated sludge method, a biofilm method and an oxidation pond method.
[0004]
The biofilm method is a treatment method that uses a group of microorganisms that grow on the surface of a filter medium such as crushed stone or plastic contact material, and representative examples include a contact aeration method, a rotating plate contact method, a diffused filter bed, and the like. This contact aeration method is a method in which the filter medium (contact material) is immersed in water and air is supplied through an air diffuser in order to maintain an appropriate aeration and stirring state.
[0005]
This air diffuser prevents the air diffused from becoming uneven due to clogging of the air diffused part.For example, when the air diffuser cannot keep the air horizontally, sufficient stirring and mixing cannot It is said that there is a problem that unevenness occurs in the size of the.
[0006]
Incidentally, a conventional general air diffuser 50 is configured as shown in FIG.
[0007]
In other words, this air diffuser 50 is used for the entire aeration system arranged in the entire aeration chamber, and is arranged at the bottom of the aeration chamber or tank, and a contact material (not shown) is placed above it via a gantry (not shown). Contained.
[0008]
The air diffuser 50 is configured as a pair of left and right rough slatted or lattice air diffusers using, for example, a ready-made PVC pipe (circular tube) of 18 mmφ.
[0009]
That is, the diffuser pipe 50 is formed by assembling the outer frame pipes 51, 51, the middle pipes 52, 52, the central frame pipes 53, 53, and the outer frame short pipes 54, 54 whose ends are bent at 90 °. As shown in FIG. 2, the rectangular frame is roughly square and 400 mm long and 1000 mm wide.
[0010]
For assembling these pipes, a plurality of teeth (T-shaped pipe joints) 55 are used so that the long part of the outer frame pipe 51 and the middle pipe 52 are parallel to each other. The bent ends and the ends of the middle pipe 52 are connected by adhesive bonding with the first and second seeds 55, 55, and one end of the outer frame short pipe 54 is connected to the second seed 55. The other end of the outer frame short pipe 54 and one end of the center frame pipe 53 parallel to the middle pipe 52 are bonded and connected by a third seed 55.
[0011]
The first teeth 55 are connected to the rising teeth 56 via an insert connecting pipe (not shown). The rising teeth 56 serve as an air introduction source such as a blower installed above. Connected.
[0012]
The rising seed 56 is connected to the other end of the central frame pipe 53 by adhesive bonding.
[0013]
In the long part of the outer frame pipe 51, the middle pipe 52 and the central frame pipe 53, a plurality of air ejection holes 57, 57... Are opened at a predetermined pitch, for example, at intervals of about 75 mm. .
[0014]
In order to connect the coarse slats on one side with the other coarse slats and set them in the aeration chamber, the riser 56 and the third tee 55 are connected with a seal plug called an insert cap. A material (not shown) is adhesively bonded.
[0015]
Therefore, when air of extremely low pressure of 0.2 kg / cm ² , for example, is introduced from each of the rising seeds 56, bubbles are ejected from the large number of air ejection holes 57 over the entire aeration chamber. It is possible to secure the amount of dissolved oxygen in the contact material, and in some cases, perform operations such as backflow when the contact material is blocked.
[0016]
[Problems to be solved by the invention]
However, the air diffuser 50 has the following problems.
[0017]
(1) A large number of pipes are used to assemble a large number of pipes into a rough slatted shape (coarse lattice pattern). Therefore, when manually inserting the pipes into the seeds, the amount of insertion is uneven. As a result, the entire diffuser tube is distorted, and it is difficult to assemble a solid frame.In the case of excessive insertion, the air flowing in the pipe or the cheese is hindered, and air bubbles are generated. Unevenness occurs in size.
[0018]
(2) Since many seeds are used, the cost increases as a result of the seeds being ordered separately.
[0019]
(3) Manual assembly of the teeth and pipes is cumbersome, especially because these are adhesively joined to form a finished product. For example, if there is an assembly failure that inhibits the flow of air, for example. The entire completed air diffuser is discarded to reduce productivity, but if left as it is, a low quality air diffuser is provided.
[0020]
[Means for Solving the Problems]
Therefore, the present invention was created to completely eliminate such problems, and in particular, to provide a reliable gantry and an air diffuser that gives reliability to delicate wastewater treatment by the biofilm method. The gist of this is as follows: 1) Roughness using a plurality of elliptical pipes made by blow-molding PVC original pipes, with the top and bottom of the pipe on the long diameter side being installed vertically. A grid-like gantry, characterized in that a receiving port is integrally formed on the bulging surface on the short diameter side of the elliptical tube at the time of the blow molding, and a differential port of another elliptical tube is adhesively bonded to the receiving port. 2) A plurality of elliptical pipes made by blow-molding PVC original pipes, and the pipe top and pipe bottom on the long diameter side are assembled in the vertical direction. It is a rough grid-like member for a diffuser pipe used in a septic tank, and a front opening is provided at the bulge portion on the short diameter side of the elliptical pipe. It was formed as an integral part during blow molding and used as a diffuser tube member for a septic tank in which the outlet of another elliptical tube was adhesively bonded to the receiving port, and air ejection holes were drilled on the long diameter side of these elliptical tubes. 2. The septic tank according to claim 1, wherein the septic tank is a member for a diffuser pipe used for the septic tank, and 3) an elliptical tube or pipe having a gage having a plug stopper is provided around the receptacle. 4) An elliptical tube or pipe having an insertion port provided with an insertion stopper and having an air ejection hole formed in the tube bottom thereof is adhesively bonded to the receiving port. It exists in the member for a diffuser pipe used for the septic tank of 2.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The invention will be described in more detail by means of an embodiment shown in the accompanying drawings.
[0022]
1 is an overall rear view of an embodiment of the present invention, FIG. 2 is a side view as viewed from the direction of arrow A in FIG. 1, and FIG. 3 is a detailed view of essential parts of FIG. Since the explanation of is simplified, it will be supplemented as it is.
[0023]
A first embodiment of the present invention relates to a member for a contact material support frame used in a septic tank, and another embodiment relates to a member for a diffusing pipe for a septic tank. First, the diffusing pipe 1 will be described.
[0024]
The air diffuser 1 is a so-called contact aeration tank (for example, for a family of five) that treats household wastewater.
[0025]
The aeration is ejected as bubbles from the bottom of the submerged filter bed tank (aeration tank), which is introduced at a rate of about 25 liters / minute by a rotary blower installed above.
[0026]
In FIG. 1 and FIG. 2, the air diffuser 1 is configured in a coarse lattice shape by using a plurality of blow-molded PVC straight tubular elliptic tubes having a major axis of 22 mm and a minor axis of 15 mm, for example.
[0027]
For this blow molding, a cold parison method is used, for example, into a heated PVC raw pipe of 18 mmφ, and in the mold, pressurized air or hydraulic pressure is introduced into the original pipe and blow-molded into an elliptical pipe. .
[0028]
Now, in FIG. 1, one rough latticed diffuser tube 1 composed of a rectangular frame of approximately 320 mm in length and approximately 300 mm in width is composed of outer frame elliptic tubes 2 a, 2 b, 2 c assembled in a U-shape, and a center frame The elliptical tube 3 and a middle elliptical tube 4 that connects the U-shaped connecting portion 2b of the outer frame elliptical tube 2 and the central frame elliptical tube 3 at a substantially middle portion thereof are assembled.
[0029]
These aerial tubes (2, 3, 4) are provided with a plurality of air ejection holes 5, 5,... At a predetermined pitch (for example, at intervals of 50 mm) in the tube bottom, and aeration introduced from the central frame elliptic tube 3. Low pressure air for stirring (or for backwashing) is jetted out as bubbles.
[0030]
Therefore, one end side of the central frame elliptic tube 3 is formed by a pipe body 6 so that a general pipe joint 7 such as an elbow (or a cheese) which is a ready-made product can be easily matched and adhesively bonded, A PVC rising pipe 8 is connected to the pipe joint 7 by adhesive bonding, and is connected to an air introduction source such as a rotary type blower (not shown).
[0031]
Further, a seal plug 9 is inserted into the other end of the central frame elliptic tube 3 so as to block outflow of air and intrusion water.
[0032]
In order to integrate the one coarse grid-like air diffuser 1 and the other air diffuser 1 as described above, a plurality of central frame elliptical tubes 3 and 3 having a sealed plug (not shown) are inserted. They are connected by (two) left and right dividing pipes 10.
[0033]
And in order to arrange | position the diffuser pipe | tube 1 which consists of a pair of the above rough lattices on the tank bottom 11, it attaches to each one end part (anti-center frame elliptical tube side) of the said outer frame elliptical pipes 2a and 2c. The cylindrical portions 12 and 12 are integrally extended, and the mounting cylindrical portion 12 is inserted into a concave portion of a main body receiving angle 13 made of vinyl chloride and bonded and supported. The feet 14 of the main body receiving angle 13 are fixed to the tank bottom 11 by screws.
[0034]
Now, in order to configure the plurality of straight tubular outer frame elliptic tubes 2a, 2b, 2c as described above in a U shape, or to connect the central frame elliptic tube 3 and the middle elliptic tube 4 to the outer frame elliptic tube 2, The following joint structure (joint structure) 15 is adopted.
[0035]
3A is a partial cross-sectional detail view of the joint structure 15 and FIG. 3B is a cross-sectional view taken along the arrow A in FIG. 17 and the central frame and the elliptical pipes in the middle) 17), in order to secure its own strength and to secure the molding strength of the receiving port 16, its long-diameter pipe top / bottom bottom is in the vertical direction. Thus, the receiving port 16 is integrally formed from the bulging surface 18 on the short diameter side at the time of the elliptic tube blow molding, and the production is inexpensive by one-shot molding.
[0036]
Incidentally, compared to the case where the receiving port is blow-molded on the side surface of a substantially equivalent circular pipe, a thick and long receiving port length is ensured, and the joining strength with the later described opening 19 is obtained.
[0037]
The receiving port 16 is formed in a circular shape so as to be convenient for an adhesive joining operation such as a uniform application by reciprocating a little after reciprocating the adhesive after application of the adhesive, in the same manner as the general one together with the opening 19.
[0038]
Therefore, the base portion of the receiving port 16 can be blown out as it is in the axial direction of the elliptical tube 17, but the receiving port 16 is connected via the bulging seat portion 20 on the long diameter tube top and tube bottom side orthogonal to this. Blow-extend.
[0039]
On the other hand, at the end of the other elliptical tube 17 joined to the receiving port 16, a differential port 19 is integrally formed at the time of elliptical tube blow molding. A ring-shaped insertion stopper 21 that regulates the insertion length is provided around the insertion opening 19.
[0040]
Therefore, even the amateur can mechanically insert and join the receptacle 19 with the adhesive applied on the outer surface thereof to the receptacle 16 of the elliptical tube 17, and as a result, a predetermined gap length can be obtained. This prevents a decrease in bonding strength due to a shortage and a blockage of air flow due to an excess.
[0041]
Therefore, this improves the productivity of the air diffuser 1, improves the quality of the septic tank in a harsh state, and consequently increases the durability, and prevents deformation of the air diffuser 1 due to the enhancement. For example, it contributes to securing the amount of dissolved oxygen, and can contribute to wastewater treatment by a delicate biofilm method.
[0042]
In particular, since the air ejection hole 5 is formed with the long-diameter side tube top of the elliptical tube 17 facing upward and, consequently, the long-diameter side tube bottom facing downward, the low-pressure air flowing through the elliptical tube 17 is moved into the egg. It flows smoothly and diffuses based on the flow principle of the shaped pipe.
[0043]
The elliptical tube 17 itself has a strength against the external force (for example, shocking input at the tip of the vacuum hose at the time of cleaning) on the longer diameter side, and the shorter diameter side is a set with other members. In particular, the strength of the quadrangular frame is obtained, and the strength of the receiving port 16 by blow molding and the adhesive joint strength of the receiving port and the outlet are combined to improve the quality of the air diffuser 1 as a whole.
[0044]
In addition, in the above diffusing pipe 1, if the air ejection hole 5, the pipe joint 7, the rising pipe 8 and the like are omitted, a general frame used for the septic tank can be configured as it is.
[0045]
Therefore, the description of the mounting of the gantry is omitted because it is the same as that of the air diffuser 1.
[0046]
In addition, in order to configure the outer frame elliptical tube 2 of the above embodiment in a U shape, three straight tubular elliptical tubes are assembled in a U shape, but an elliptical tube bent orthogonally at the end thereof is used. You may use suitably.
[0047]
Of course, the shape of the coarse lattice is not limited to that shown in the drawings, but may be any rectangular structure that surrounds at least four sides.
[0048]
In addition, the air diffusion pipe 1 is set in a septic tank that always performs aeration and agitation operations, or a septic tank that performs aeration and agitation operations only during backwashing, etc., depending on the quality of the wastewater to be treated and the target treated water quality. Also, it can be applied to variously modified operations depending on the price of the septic tank.
[0049]
【The invention's effect】
According to the present invention, the strength in the vertical direction can be obtained by assembling the elliptical major axis in the vertical direction, and the strength on the left and right can be obtained by jointing the receptacle and the outlet of other members in accordance with this strength. As a whole, the coarse grid-like gantry and the air diffuser can be firmly configured.
[0050]
In particular, since the receiving port for adhesive bonding is extended from the bulged surface on the short diameter side of the elliptic tube, a thick receiving port length can be ensured and the assembly strength can be contributed.
[0051]
Since the air diffuser tube is configured as described above, the air ejection holes are not crushed or avoided by the distortion of the air diffuser tube, and the bubbles are not uneven.
[Brief description of the drawings]
FIG. 1 is an overall rear view of an embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a detailed view of a main part of FIG. 1;
FIG. 4 is a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Air diffuser tube, 2 ... Outer frame elliptical tube, 3 ... Center frame elliptical tube, 4 ... Middle elliptical tube, 5 ... Air ejection hole, 16 ... Receiving port, 19 ... Inlet port, 21 ... Outer port stopper

Claims (4)

A rough grid-like pedestal assembled by using a plurality of elliptical pipes made by blow-molding PVC original pipes, with the top and bottom of the pipes on the long diameter side being assembled vertically,
A base member for use in a septic tank, wherein a receiving port is integrally formed at the time of blow molding on the bulging surface on the short diameter side of the elliptic tube, and a different opening of another elliptic tube is adhesively bonded to the receiving port . This is an air diffuser pipe member used in a septic tank in the form of a rough lattice, which is assembled by using a plurality of elliptical pipes made by blow-molding PVC original pipes, with the top and bottom of the major diameter side of the pipe being vertically aligned. And
In the bulging portion on the short diameter side of the elliptical tube, a receiving port is integrally formed at the time of the blow molding, and a member for a diffuser tube used in a septic tank in which a different opening of another elliptical tube is bonded and joined to the receiving port,
An air diffuser member for use in a septic tank, characterized in that an air ejection hole is formed on the long diameter side of these elliptical tubes .   The base member used for the septic tank according to claim 1, wherein an elliptical tube or pipe having an insertion port provided with an insertion stopper is adhesively bonded to the receiving port.   3. An air diffuser for use in a septic tank according to claim 2, wherein an elliptical tube or pipe having an insertion port provided with an insertion stopper and having an air ejection hole formed in the tube bottom thereof is bonded and joined to the receiving port. Element.

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