JP2009221979A - Air lift pump for septic tank, and processed water transport device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify maintenance work for the inside of a header device. <P>SOLUTION: This air lift pump for septic tank is provided with a lifting pipe 20 installed in a septic tank and an air supply tube 21 for supplying air to a lower part of the lifting pipe 20, and a header device 24, which comprises a connection part 22 connected to an upper end of the lifting pipe and a flow-out guide part 23 for making the processed water pumped by the lifting pipe into the lateral direction. An opening part 28 is formed so as to continuously open an upper part of the connection part and an upper part of the flow-out guide part. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is provided with a pumping pipe mounted in the septic tank, an air supply pipe for supplying air to the lower part of the pumping pipe, and a connecting part connected to the upper end of the pumping pipe and the pumping pipe. The present invention relates to an air lift pump for a septic tank provided with a header device provided with an outflow guide portion for causing the pumped water to be discharged in a lateral direction, and a treated water transfer device provided with the air lift pump for the septic tank.

In the septic tank air lift pump, sludge and the like are accumulated inside a header device having a connection part connected to the upper end of the pumping pipe and an outflow guide part for discharging the treated water pumped up by the pumping pipe laterally. Therefore, it is necessary to perform maintenance work on the inside of the header device such as removing the accumulated sludge.
A conventional header device of a septic tank air lift pump is formed with a concentric pipe connection portion connected to the upper end of the pumping pipe in a concentric cylinder shape and a pumping guide for the outflow guide. The outflow guide connection portion connected to the pipe connection portion is also formed in a cylindrical shape, and the outflow guide connection portion is connected in a T shape to the cylindrical wall of the pumping pipe connection portion (see, for example, Patent Document 1). .)

JP-A-7-284789

For this reason, when carrying out maintenance work for the inside of the header device, the cylindrical wall portion of the pumping pipe connection part and the outflow guide connection part is in the way, making it difficult to check the situation inside them, and the pumping pipe connection part There is a drawback that it is difficult to scrape the sludge accumulated on the inner side to the outflow guide part, and it takes time for maintenance work.
The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to easily perform maintenance work on the inside of the header device.

1st characteristic structure of this invention is provided with the pumping pipe with which it installs in a septic tank, the air supply pipe which supplies air to the lower part of the said pumping pipe, and the connection part connected to the upper end part of the said pumping pipe And an air lift pump for a septic tank provided with a header device comprising an outflow guide portion for causing the treated water pumped up by the pumping pipe to flow out in the lateral direction,
An opening is formed to open the upper part of the connection part and the upper part of the outflow guide part in series.

[Action and effect]
Since an opening is formed to open the upper part of the connecting part connected to the upper end of the pumping pipe and the upper part of the outflow guide part, when opening the manhole cover of the septic tank and inspecting it, It is easy to confirm the situation inside and the situation inside the outflow guide part from above through the opening that opens the upper part of the connection part and the upper part of the outflow guide part.
In addition, since an opening is formed to open the upper part of the connection part and the upper part of the outflow guide part in series, the sludge accumulated inside the connection part is scraped out toward the outflow guide part through the opening. easy.
Therefore, it is easy to check the situation inside the connection part and the situation inside the outflow guide part, and the sludge accumulated inside the connection part can be easily scraped out toward the outflow guide part. Can be done.

  The 2nd characteristic structure of this invention exists in the point which the cover body which covers the upper part of the said connection part at least among the said opening parts is attached so that opening and closing is possible.

[Action and effect]
Since the lid that covers at least the connection part of the opening is openable and closable, the maintenance work for the inside of the header device is simplified by opening the cover and opening the connection part. By closing the lid and closing the upper part of the connecting portion, it is possible to prevent scattering of water to be treated and sludge from the upper end of the pumping pipe.

  According to a third characteristic configuration of the present invention, the air supply pipe is placed inside the pumping pipe at a location different from the attachment portion of the lid body, and its axis is substantially parallel to the axis of the pumping pipe. Thus, there is a support portion to be supported.

[Action and effect]
Since there is a support part that supports the air supply pipe inside the pumping pipe at a location different from the attachment part of the lid so that its axis is substantially parallel to the axis of the pumping pipe, The lid can be opened and closed without particularly removing the air supply pipe from the support portion, and maintenance work for the inside of the header device can be performed more easily.
In addition, since the air supply pipe can be attached to the inside of the pumping pipe, air can be supplied into the pumping pipe without connecting the end of the air supply pipe and the pumping pipe. The mounting work can be simplified.

The 4th characteristic structure of this invention is a to-be-processed water conveyance apparatus provided with the air lift pump for septic tanks of any one of Claims 1-3,
A lateral conveyance guide member capable of laterally conveying the water to be treated that has flowed out of the outflow guide portion is provided, and a connecting portion of the lateral conveyance guide member to the outflow guide portion covers an outer peripheral surface side of the outflow guide portion. A folded portion having a shape that is folded back toward the inner surface of the flange on the upper edge side of the flange-shaped portion, and the outflow guide portion is inserted between the flange-shaped portion and the folded portion, The lateral conveyance guide member is configured to be connectable to the outflow guide portion.

[Action and effect]
Without changing the shape of the outflow guide part, the lateral guide member can be connected to the outflow guide part by inserting the outflow guide part between the hook-shaped part provided in the connection part and the folded part. The treated water that has flowed out from the outflow guide portion can be further easily transported in the lateral direction as needed.

Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show a septic tank 1 that purifies domestic wastewater (sewage) as treated water.
In addition, the solid line arrow in FIG. 1 has shown the advection direction of to-be-processed water, and the broken line arrow has shown the return direction of the solid content (sludge etc.) collected in the tank bottom part.
2 is a view taken along the line II-II in FIG.

  As shown in FIG. 1, the septic tank 1 includes an anaerobic tank A in which the inside of a tank outer wall 2 having a manhole M or the like is partitioned by a first partition wall 3 and a second partition wall 4 to anaerobically treat the water to be treated. And an aerobic tank B for anaerobically treating the treated water anaerobically treated in the anaerobic tank A and a precipitation tank C for precipitating the treated water aerobically treated in the aerobic tank B. A disinfection tank D adjacent to the sedimentation tank C with a partition wall 61 is provided inside the sedimentation tank C as a treatment tank other than the above.

  The anaerobic tank A is divided into a solid-liquid separation tank A1 from which treated water flows from the outside through the inflow pipe 7, and an anaerobic treatment tank A2 for anaerobically treating the treated water separated in the solid-liquid separation tank A1. The water to be treated, which is partitioned by the three partition walls 5 and solid-liquid separated in the solid-liquid separation tank A1, is configured to flow into the anaerobic treatment tank A2 from the advection section 9 provided in the third partition wall 5. .

  In the solid-liquid separation tank A1, a baffle plate 10 having a substantially U-shaped horizontal cross-section is fixed to the outer wall 2 of the tank so as to surround the outlet side of the inlet pipe 7 at the upper end thereof. 7, the flow direction of the water to be treated flowing into the solid-liquid separation tank A1 is regulated downward.

The water to be treated which has been anaerobically treated in the anaerobic treatment tank A2 is caused to flow into the aerobic tank B by overflow from the overflow port 8 provided in the first partition wall 3, and the treated water which has been aerobically treated in the aerobic tank B is precipitated. The supernatant water to be treated, which has been transferred to the tank C and precipitated with solids, is introduced into the water collection tank E provided inside the precipitation tank C, and the water to be treated flowing into the water collection tank E is supplied to the disinfection tank D. The treated water sterilized with the chemical added from the chemical cylinder 11 is discharged from the discharge pipe 6 to the outside.
Further, a sludge return passage 59 is provided for returning the sludge precipitated at the bottom of the settling tank C to the solid-liquid separation tank A1 together with the water to be treated by the first air lift pump 58.

  As shown in FIGS. 3 to 6, the water collecting tank E includes a horizontally long water collecting portion 14 surrounded by a water collecting wall 13 forming a triangular corrugated overflow weir 12 in a side view, and its water collecting A vertically long bottomed cylindrical recessed portion 15 that communicates with the inner bottom portion of the portion 14 is integrally formed, and the recessed portion 15 is disposed at the center in the width direction of the water collecting portion 14 so as to be substantially bilaterally symmetric in a front view. The water to be treated in the settling tank C passes through the overflow weir 12 and flows into the water collecting part 14, and then flows into the recessed part 15 to be stored.

  The recessed portion 15 is formed in a bottomed cylindrical shape surrounded by an outer peripheral wall 16 and a bottom wall 17 having a substantially rectangular cross section in the horizontal direction, and the diameter of the recess 15 gradually decreases toward the bottom wall 17 side. It forms in the shape of a circle, and it is made to project to the 2nd partition wall 4 side rather than the water collection part 14.

  And the 2nd air lift pump 18 as a pumping device which can pump up the to-be-processed water which flowed into the water collection tank E in the position higher than the water surface WL (height of the overflow dam lower end) in the sedimentation tank C, and the pumped water pump A flow path 19 through which the treated water flows into the disinfection tank D is provided.

  The said 2nd air lift pump 18 comprises the air lift pump for septic tanks by this invention, and the to-be-processed water conveyance apparatus F provided with this 2nd air lift pump 18 is provided so that it may mention later.

  A water collection tank support 39 is provided at the lower end of the water collection tank E so as to be able to swing the water collection tank E around the axis Y along the horizontal direction, and the water collection tank E swings from the water collection tank support 39. An attitude fixing unit 40 that can be adjusted and fixed at a remote position is provided.

  As shown in FIG. 8 (b), the water collecting tank support portion 39 is integrally provided with a rib having a through hole 41 on the lower end side of the bottom wall 17 forming the recessed portion 15, and the penetration A support shaft member 42 that enters the hole 41 is provided on the second partition wall 4.

  As shown in FIG. 8A, the posture fixing portion 40 extends a wall portion on the second partition wall 4 side of the outer peripheral wall 16 that forms the recessed portion 15 above the overflow weir 12. Then, a fixing plate 43 whose upper and lower plate surfaces are substantially in a circular arc shape with the pivot axis Y as the center is integrally provided on the wall portion, and the long hole 44 is elongated along the swing direction of the water collection tank E. Is formed on the fixing plate member 43, and a bolt 45 inserted through the long hole 44 is fixed to the second partition wall 4.

  Then, the water collecting tank E is swung around the rocking axis Y so that the overflow weir 12 is substantially in the horizontal direction, and is fastened and fixed by the wing nut 60 screwed to the bolt 45. Even if the installation posture is slightly inclined, the water to be treated can be introduced into the water collecting tank E from the range over the entire width of the overflow weir 12.

  As shown in FIGS. 3 to 5 and 9, the sterilization tank D is partitioned from the sedimentation tank C by a partition wall 61 formed in a box shape having a horizontal cross-sectional shape opened upward in a substantially rectangular shape. In addition, a drug cylinder receiver 48 for mounting the drug cylinder 11 is provided, baffle plates 49 surrounding the water collection tank E are provided on both the left and right sides, and fixed to the second partition wall 4 through the baffle plates 49, It is fixed to the tank outer wall 2 through the discharge pipe 6 and is mounted on the inner side of the settling tank C next to the front surface side of the water collection tank E.

  In addition, a substantially U-shaped notch 51 is formed in the water collecting wall portion 50 that surrounds the sterilizing tank D side of the water collecting section 14 and serves as an overflow port when an abnormal flow of treated water flows. A substantially U-shaped notch 53 is formed also in the tank wall portion 52 surrounding the water tank E side, and a folded portion 54 is formed that is folded back toward the outer surface of the tank wall along the edge of the notch 53. The disinfection tank D and the water collection tank E are assembled together by engaging the edge of the notch 52 in the water collection wall part 50 between the folded part 54 and the tank wall part 52.

  The drug tube receiver 48 supports a locking portion 55 that is overlapped and locked on a folded portion 54 that is engaged with an edge of the cutout portion 51 in the water collecting wall portion 50 and an end portion of the outflow guide portion 23. And a cylindrical baffle plate 57, and a chemical is added to the water to be treated which has flowed down to the chemical cylinder receiver 48 through the outflow guide 23, and directed toward the bottom of the disinfection tank D through the baffle plate 57. After flowing down, it can be discharged to the outside through the discharge pipe 6.

  As shown in FIGS. 3 to 7 and FIGS. 10 to 12, the second air lift pump 18 is a cylindrical pumping that can be mounted in the recessed portion 15 provided in the water collecting tank E along the vertical direction. A pipe 20 and a cylindrical air supply pipe 21 that supplies air to the lower part of the pumping pipe 20 are provided, and a pumping pipe connecting part 22 that is connected to the upper end of the pumping pipe 20 and the pumping pipe 20 lifts water. The header device 24 is provided integrally with an upward U-shaped outflow guide portion 23 that causes the treated water to flow out in the lateral direction, and flows out from the flow path 19 through which the treated water that has been pumped flows into the disinfection tank D. The guide portion 23 is formed.

  And the water inlet 46 provided in the lower end part of the pumping pipe 20 is made into the water collection tank E, and the recessed part 15 is formed in the lower end part of the 2nd air lift pump 18, ie, the lower end part of the pumping pipe 20. It is inserted near the bottom wall 17 and is located near the water collection tank support 39.

  Moreover, as shown in FIGS. 6 and 7, the pumping pipe 20 is inserted into the recessed portion 15 on the inner surface of the outer peripheral wall 16 near the water collection tank support portion 39, that is, near the bottom wall 17 forming the recessed portion 15. A positioning portion 47 is provided which is fitted on the lower end portion and can position the lower end portion.

  The pumping pipe connecting part 22 and the outflow guide part 23 are integrally molded, the pumping pipe connecting part 22 is formed in a cylindrical shape that is fitted on the upper end of the pumping pipe 20, and the outflow guide part 23 is a pumping pipe. An upward U-shape provided with a half-cylindrical bottom plate portion 25 having substantially the same width as the diameter of the connection portion 22 and a pair of side wall portions 26 extending parallel to each other along the left and right upper edges of the bottom plate portion 25. It is formed in a shape.

  Each of the side wall portions 26 extends near the upper edge of the pumping pipe connecting portion 22 as viewed in the axial center X direction of the pumping pipe 20, substantially along the diameter direction of the pumping pipe connecting portion 22, and The upper part of the pumping pipe connecting part 22 and the upper part of the outflow guide part 23 are opened in series by connecting to the end part of the end wall part 27 formed along the axis X direction of the pumping pipe 20. An opening 28 is formed, and an end portion of the side wall portion 26 is formed in an L-shaped shape so that a lateral conveyance guide member 29 described later can be connected.

  An arc-shaped surrounding wall 30 that surrounds the upper part of the pumping pipe connecting part 22 in a substantially half arc shape along the circumferential direction, and a pumping pipe connection at a part opposite to the outflow guide part 23 across the end wall part 27. A dome-shaped covering wall 31 covering the upper portion of the portion 22 is integrally provided, and the lower end of the end wall 27 is connected to the arc-shaped surrounding wall 30 and the covering wall 31, and the arc-shaped surrounding wall 30 and The inside of the cover wall portion 31 faces the inside of the outflow guide portion 23.

  A substantially rectangular resin lid 32 that covers the upper side of the pumping pipe connection portion 22 is attached to one side wall portion 26a so as to be freely opened and closed, and is attached to a portion different from the attachment portion of the lid body 32, that is, to the covering wall portion 31. A cylindrical air supply pipe support portion 33 that supports the air supply pipe 21 inside the pumping pipe 20 so that the axis of the air supply pipe 21 is substantially parallel to the axis X of the pumping pipe 20 is provided.

  The air supply pipe support part 33 is configured so as to be able to insert and support the air supply pipe 21 inside the cylindrical part, but as shown in FIG. It is comprised by the cylindrical part 33a and the downward cylindrical part 33b which protrudes below the covering wall part 31, and the air supply pipe 21 is divided | segmented up and down on both sides of the covering wall part 31, and the upper air supply pipe part 21a is divided. The lower end is externally fitted to the upward cylindrical portion 33a, the upper end of the lower air supply pipe portion 21b is externally fitted to the downward cylindrical portion 33b, and the air supply pipe 21 is located inside the pumping pipe 20 and its axis is the pumping pipe. You may be comprised so that it can support so that it may be substantially parallel with respect to 20 axis X.

  Further, as shown in FIGS. 15 and 16, a convex portion 63 is provided inside the cylindrical portion of the air supply pipe support 33, and the upper air supply pipe portion 21a and the lower air supply pipe portion 21b are connected to the air supply pipe. The air supply pipe 21 may be configured to be fitted in the support portion 33 so that the air supply pipe 21 can be supported inside the pumping pipe 20 so that the axis of the air supply pipe 21 is substantially parallel to the axis X of the pumping pipe 20. good.

  As described above, the header device 24 includes the pumping pipe connecting portion 22 that can be connected to the pumping pipe 20 below and the outflow guide portion 23 that allows the treated water pumped up by the pumping pipe 20 to flow out in the lateral direction. And the opening part 28 which opens the upper part of the pumping pipe connection part 22 and the outflow guide part 23 in series is formed. For this reason, since the inner surface of the header device 24 is configured so as not to overlap in the vertical direction (the axial center X direction of the pumping pipe 20 when the pumping pipe is connected), the pumping pipe connecting part 22 and the outflow guide part. 23, when the molding die is moved in the vertical direction, the molded pump connection portion 22 and the outflow guide portion 23 can be separated from the die. Simplification can be achieved. Furthermore, since the air supply pipe support part 33 is provided in the part opposite to the outflow guide part 23 side above the pumping pipe connection part 22, the pumping pipe connection part 22, the outflow guide part 23, and the air supply pipe support part 33 are provided. In the case of integrally molding the molding process, the molding process can be simplified in the same manner as described above.

  The lid 32 is formed with a groove 34 for inserting the upper end portions of the left and right side wall portions 26 and the end wall portions 27 along the peripheral edge thereof, and has a flexible attachment band plate. 35 is integrally formed, the end of the band plate 35 is detachably attached to one side wall 26a, the lid 32 is detachably attached, and the left and right side walls 26 and the end wall 27 are formed in the groove 34. The upper end portion of each is inserted, and the opening portion 28 is opened and closed freely.

  In addition, when the distance from the second air lift pump 18 to the disinfection tank D is long, as shown in FIG. The to-be-processed water conveyance apparatus F which connects the half-divided-shaped horizontal conveyance guide member 29 which can be conveyed to the inside is comprised so that the flow path 19 into which the treated water which was pumped inflows into the disinfection tank D can be extended. It is.

  The lateral conveying guide member 29 has a shape that is folded back toward the inner surface side of the hook-shaped portion 37 having a U-shaped cross section and the upper edge side of the hook-shaped portion 37 over the entire length thereof. An end portion of the outflow guide portion 23 is inserted between the hook-shaped portion 37 that is provided with the folded portion 38 and constitutes the connecting portion 36 to the outflow guide portion 23, and the folded portion 38. The lateral conveyance guide member 29 is configured to be connectable to the outflow guide portion 23 in a state where the outer peripheral surface side is covered with the hook-shaped portion 37.

  In addition, on the inner bottom surface of the lateral conveyance guide member 29, four streak marks 62 that can visually confirm the amount of water are formed over the entire length so that the upper limit and the lower limit of the conveyance water amount can be confirmed. It is.

[Other Embodiments]
1. The air lift pump for the septic tank according to the present invention may be used for returning solid matter such as sludge precipitated in the downstream processing tank to the upstream processing tank.
2. The to-be-processed water conveyance apparatus by this invention may form the horizontal conveyance guide member in the cylinder shape.

Vertical section of septic tank II-II arrow view of FIG. Plan view of main parts of septic tank Longitudinal cross section showing water collection tank and disinfection tank Exploded perspective view showing water collection tank and disinfection tank Front view showing the inside of the water collection tank Cross section of the main part Longitudinal section of the main part Front view showing the inside of the disinfection tank Vertical section of air lift pump Front view of partial cross section of air lift pump Perspective view of main parts of air lift pump Perspective view of the main part of the treated water transfer device A longitudinal sectional view showing another embodiment of the main part Longitudinal sectional view showing another embodiment of the air lift pump Partial sectional front view showing another embodiment of the air lift pump

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Septic tank 20 Pumping pipe 21 Air supply pipe 22 Connection part 23 Outflow guide part 24 Header apparatus 28 Opening part 29 Lateral conveyance guide member 32 Cover body 33 Support part 36 Connection part 37 Hook-shaped part 38 Folding part X Axis core

Claims (4)

A pumping pipe installed in the septic tank, an air supply pipe for supplying air to the lower part of the pumping pipe, a connecting part connected to the upper end of the pumping pipe, and a pumped water pumped by the pumping pipe An air lift pump for a septic tank provided with a header device provided with an outflow guide portion for allowing the treated water to flow out in the lateral direction,
An air lift pump for a septic tank, in which an opening for opening a series of the upper part of the connection part and the upper part of the outflow guide part is formed.   The air lift pump for a septic tank according to claim 1, wherein a lid that covers at least the upper part of the opening of the opening is attached so as to be freely opened and closed.   A support portion for supporting the air supply pipe on the inner side of the pumping pipe so that the axis of the air supply pipe is substantially parallel to the axis of the pumping pipe is provided at a location different from the attachment portion of the lid. The air lift pump for a septic tank according to claim 2. A treated water transfer device comprising the septic tank air lift pump according to any one of claims 1 to 3,
A lateral conveyance guide member capable of laterally conveying the water to be treated that has flowed out of the outflow guide portion,
A flange-like portion that covers the outer peripheral surface side of the outflow guide portion at the connection portion of the lateral conveyance guide member to the outflow guide portion, and a shape that is folded back toward the inner surface side of the saddle portion on the upper edge side of the flange-like portion. Set up a section,
A treated water conveyance device configured such that the outflow guide portion is inserted between the bowl-shaped portion and the folded-back portion so that the lateral conveyance guide member can be connected to the outflow guide portion.

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