JP4271326B2 - Air pump and wastewater septic tank with flow path switching function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air pump with a flow path switching function and a sewage septic tank, and more specifically, an air pump that alternately discharges air from two air pumps, such as a diaphragm vibration type air pump, an electromagnetic air pump, and a rotary air pump, And a sewage septic tank incorporating the same.
[0002]
[Prior art]
Air pumps such as a diaphragm vibration type air pump that discharges air by vibrating a diaphragm and a rotary air pump that discharges air by rotation of a rotor eccentrically provided in the box body by the power of a motor are widely known.
[0003]
In order to alternately discharge air to two systems to which air should be supplied using such an air pump, a method in which one air pump is arranged for each of the two systems and is controlled by a controller having a timer function ( For example, the controller outputs an output signal every predetermined time, and when the output signal is ON, only one air pump is operated, and when the output signal is OFF, only the other air pump is operated.
[0004]
Recently, as shown in FIGS. 7 and 8, the air chamber of the air pump is divided into a plurality of parts, and a valve body for switching the air flow path is provided in one section, and the operation of the valve body is instructed by the controller. A branch flow path capable of switching the air supply destination and an air pump with a switching function (one pump) has also been proposed (Japanese Patent Laid-Open No. 10-238473).
[0005]
These air pumps are incorporated and used in, for example, a sewage septic tank that purifies only urine in a toilet or a combined living drainage in which a toilet, a kitchen, a bathtub, and laundry are combined.
[0006]
[Problems to be solved by the invention]
In the above-described air pump with the branch flow path and the switching function, the two air discharge ports are attached to and fixed to the casing, and they are connected to the air flow path in the casing. Therefore, if an incorrect air pipe is used in the installation work of the sewage septic tank with the arrangement of the air pump and the plurality of air pipes, the air pipe must be redone. The air pipe is buried in the ground together with the septic tank, and in some cases, it is hardened with asphalt or concrete. Also, when it is necessary to replace the air pump due to its service life, etc., the position of the air outlet of the previous air pump and the position of the air outlet of the replacement air pump may be reversed. Cross and damage the beauty.
The present invention intends to solve such a problem, that is, the two air discharge ports are not fixedly connected to the air flow path in the casing, and the two air discharge ports and the air in the casing It is an object of the present invention to provide an air pump that can easily change the connection form with a flow path.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, the air pump of the present invention has the following configuration. That is, the air pump of the present invention is
A pump body 2 that discharges air, a branch flow path that receives discharge air from the pump body 2 at an inflow port and divides it into two systems, and two discharge ports connected to the ends 7 and 8 of the branch flow path 5 and 6 and an air pump 1 having a flow path switching device provided at a branch portion of the branch flow path,
Between the ends 7 and 8 of the two branch flow paths and the two discharge ports 5 and 6, the connection between both ends (that is, the ends 7 and 8 of the branch flow paths and the discharge ports 5 and 6) is exchanged. It is an air pump characterized in that an adapter 3 that can be formed is sandwiched.
[0008]
The adapter 3 here is used in the meaning of the portion excluding the two discharge ports 5 and 6, which means that the adapter 3 and the two discharge ports 5 and 6 are not necessarily separable or detachable. Instead, the adapter 3 and the two discharge ports 5 and 6 may be an integrally molded product that cannot be separated. The two discharge ports 5 and 6 can be attached to the adapter 3 by post-processing, but are preferably an integrally molded product. Such an integrally molded product may be called an “adapter”.
One of the preferable shapes of the adapter 3 is a substantially hollow cylindrical shape with a shallow depth, and the inside thereof is parallel to the air flow flowing from the branch flow channel ends 7 and 8 to the discharge ports 5 and 6 (the air flow is not blocked). ) It is partitioned by the partition plate 9, and the position of the partition plate 9 can be changed to a predetermined position.
[0009]
As the pump body 2, there are a diaphragm vibration type air pump, an electromagnetic air pump, a rotary type air pump and the like, and any pump can be used as long as it has a function of discharging compressed air. A frequently used pump is a diaphragm vibration type pump.
[0010]
The present invention is also an air pump used for aeration to an aerobic filter bed tank, cleaning of a biological carrier (also referred to as contact material or filter medium) in the aerobic filter bed tank, or pumping by an air lift. It also relates to the sewage septic tank 24 in which the air pump is incorporated.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described more specifically with reference to the accompanying drawings.
FIG. 1 is an external view (perspective view) of an air pump according to an example of the present invention. The pump body, the air flow path, and the flow path switching device are accommodated in the casing 11 and cannot be seen from the outside. Between the branch flow path ends 7 and 8 in the casing 11 and the discharge port A (exhaust joint A) 5 and the discharge port B (exhaust joint A) 6, an adapter 3 that can change these connection relationships is interposed. The adapter 3 has a structure that can be attached and detached by fastening and releasing a fastener such as a screw.
[0012]
2 is a view (perspective view) after removing a fixture (screw) of the adapter 3 in the air pump 1 of FIG. 1, (a) is a view of the adapter portion, and (b) is a view of the air pump body portion. . A round sheet-like packing (rubber packing or the like) 12 having a hole is sandwiched between the adapter 3 and the air pump main body so as not to leak air when the fixing tool is tightened.
[0013]
FIG. 3 is a view of the adapter as seen from the back side (therefore, the discharge ports 5 and 6 in FIG. 3 are reversed from the left and right in FIGS. 1 and 2). With reference to this figure, the action of the adapter 3, that is, the switching of the connection between the branch flow path ends 7 and 8 and the discharge ports (exhaust joints) 5 and 6 in the casing 11 will be described. A removable flow path switching partition plate 9 is provided inside the adapter 3, and the flow path switching partition plate 9 divides the space in the adapter 3 into two parts and partitions each of them to separate the branch flow path ends 7, 8. And a discharge passage (exhaust joint) 5 and 6 are formed. When the position of the flow path switching partition plate 9 is shown in FIG. 3A, the branch flow path terminal 7 and the discharge port A (exhaust joint A) 5 communicate with each other, and the branch flow path terminal 8 and the discharge port B (exhaust joint B). ) 6 communicates.
To replace the connection between the branch flow path terminals 7 and 8 and the discharge ports 5 and 6, the adapter 3 is removed, and the mounting direction of the flow path switching partition plate 9 is changed as shown in FIG. 3 can be attached again. In the case of FIG. 3B, the branch flow path terminal 7 and the discharge port B (exhaust joint B) 6 communicate with each other, and the branch flow channel terminal 8 and the discharge port A (exhaust joint A) 5 communicate with each other.
[0014]
The pump body, the air flow path, and the flow path switching device inside the air pump are not characteristic features of the present invention, and may have various variations. FIG. 4 shows an example of an air flow path and a flow path switching device inside the air pump of the present invention. (A) is a case where air is discharged from one end of the branch flow path, and also shows an enlarged view of the main part of the valve body for switching the air flow path at that time. Moreover, (b) is a plan view when air is discharged from the other branch flow path end. The air flow path is surrounded by a box-shaped outer wall, and the inside thereof is partitioned into three air chambers by partition walls, and each chamber communicates with a branch port to form a flow path to the end of the branch flow path. Here, the partition also has an effect of increasing the rigidity of the air flow path switching device.
[0015]
The air that flows into the air chamber a from the inflow port reaches the valve body. In the valve body, the piston is moved in the cylinder by an electromagnet to determine the air branching direction.
Here, as the valve body for switching the air flow path, a general-purpose electromagnetic three-way valve or electric three-way valve may be used regardless of the above-described example.
[0016]
Control of the valve body is usually performed by a controller having a timer function, and air can be discharged from an arbitrary discharge port for a predetermined time at an arbitrary time. The controller can be housed in a recessed case formed on the surface side of the box and attached to the air pump integrally.
[0017]
In FIG. 4, the air flow path accommodated in the box is an example in which the air chamber is divided into a plurality of parts, but this may be formed by a pipe line.
[0018]
FIG. 5 is an external view (perspective view) of an example of the sewage septic tank incorporating the air pump of the present invention, and FIG. 6 is a cross-sectional view for explaining the sewage septic tank of FIG. The sewage septic tank 24 will be described with reference to FIG. The sewage purification tank 24 is divided into an anaerobic filter bed tank first chamber 25, an anaerobic filter bed tank second chamber 26, an aerobic filter bed tank 27, a treated water tank 28, and a disinfection tank 29 from the inflow side. The sewage septic tank 24 can process only toilet urine, or can handle combined living wastewater such as toilets, kitchens, bathtubs, and laundry. Sewage (drainage) flows from the inflow pipe 30 and sequentially passes through the anaerobic filter bed first chamber 25, the anaerobic filter bed second chamber 26, the aerobic filter bed tank 27, the treated water tank 28, and the disinfection tank 29. By doing so, it is purified and discharged from the outflow pipe 31 to the outside of the sewage purification tank 24.
[0019]
The aerobic filter bed tank 27 includes a first filter bed 32 located at the upper stage, an air diffuser 33 for discharging air to the first filter bed 32, a second filter bed 34 located at the lower stage, and the second filter bed. It comprises a backwash pipe 35 that discharges air to the floor 34.
The first filter bed 32 is filled with a biological carrier (contact material, filter medium), and an aeration tube 33 is disposed below the first filter bed 32. A pipe 36 (FIG. 5) is connected to the diffuser pipe 33, and air from the air pump 1 is sent to the diffuser pipe 33. In the first filter bed 32, sewage is repeatedly brought into contact with the biofilm deposited and formed on the filter medium while supplying oxygen by aeration and agitation by diffusing from the diffusing tube 33, and organic matter in the sewage is aerobically treated.
[0020]
The second filter bed 34 is also filled with a biological carrier, and (semi-) aerobic treatment is performed on the organic matter remaining in the sewage, and the fine suspended matter (SS) is captured to clean the sewage. Further, a backwash pipe 35 is disposed below the second filter bed 34. A pipe 36 is connected to the backwash pipe 35, and air is diffused from the backwash pipe 35 through the pipe 36 to backwash (bubble) the second filter bed 34. The trapped SS is peeled off by bubbling the second filter bed 34. At this time, backwashing of the filter bed is performed by causing the treated water in the treated water tank 28 to flow back to the second filter bed 34. The backwash operation is performed regularly (usually once a day at night), and the backwash wastewater is transferred to the anaerobic filter bed first chamber 25.
[0021]
【The invention's effect】
In the air pump of the present invention, the two discharge ports (exhaust joints) for sending air are not fixedly connected to the end of the branch flow path in the casing, and the connection form with the end of the branch flow path in the casing is easily changed Since it is a possible structure, it has the following advantages. That is, in the installation work of the air pump and the sewage septic tank that performs a plurality of air pipes, even if an incorrect pipe is used, it is not necessary to redo the air pipe, and the air pump flow path can be easily switched. Further, even when the air pump needs to be replaced due to the life of the air pump or the like, and the air discharge port is reversely arranged, the air flow path can be easily switched. In addition, after connecting to the sewage septic tank and starting to use it, it is possible to immediately change the air flow path without requiring troublesome construction even if an erroneous piping is detected during periodic inspection or the like.
[Brief description of the drawings]
FIG. 1 is an external view (perspective view) of an air pump according to an example of the present invention. The pump body, the air flow path, and the flow path switching device are accommodated in the casing.
FIG. 2 is a diagram (perspective view) with the adapter of the air pump of FIG. 1 removed. (A) is the adapter part, and (B) is the air pump body part.
FIG. 3 is a diagram of the adapter viewed from the back side. (A) shows the connection form I, and (B) shows the connection form II.
FIG. 4 is a plan view showing an air flow path and a flow path switching device inside the air pump of the present invention. (A) is a case where air is discharged from the branch outlet B, and also shows an enlarged view of the main part of the valve body at that time, and (b) is a plan view when air is discharged from the branch outlet A.
FIG. 5 is an external view (perspective view) of a wastewater septic tank incorporating the air pump of the present invention.
FIG. 6 is a cross-sectional view for explaining the sewage septic tank of FIG. 5;
FIG. 7 is an external view (perspective view) of a conventional air pump.
FIG. 8 is a plan view illustrating a flow path switching example of a conventional air pump. (A) shows air supply from the discharge port A, and (B) shows air supply from the discharge port B.
[Explanation of symbols]
1: Air pump 2: Air pump body 3: Adapter 4: Fixing hole 4a: Fixing hole 5: Discharge port A (exhaust joint A)
6: Discharge port B (exhaust joint B)
7: Branch channel end A in the casing
8: Branch channel end B in the casing
9: Channel switching partition plate 10: Channel switching partition plate fixture 11: Casing 12: Packing 24. Wastewater septic tank 25. Anaerobic filter bed first chamber 26. Anaerobic filter bed second chamber 27. Aerobic filter bed 28. Treated water tank 29. Disinfection tank 30. Inflow pipe 31. Outflow pipe 31. First filter bed 33. Air diffuser 34. Second filter bed 35. Backwash pipe 36: piping

Claims (3)

A pump body that discharges air; a branch flow path that receives the discharge air from the pump body at an inlet and divides it into two systems; two discharge ports connected to the ends of the branch flow path; and the branch flow An air pump having a flow path switching device provided at a branch portion of a path, wherein an adapter capable of switching between the two is sandwiched between the ends of the two branch flow paths and the two discharge ports. Air pump provided. The air pump according to claim 1, wherein the adapter and the two discharge ports are integrally formed. A wastewater septic tank in which the air pump according to claim 1 or 2 is incorporated.

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