JP4312014B2 - Septic tank - Google Patents

Description

  The present invention includes a septic tank body that internally forms a water treatment space for biological treatment by receiving inflow of raw water to be treated, and a discharge pump tank for discharging the treated water biologically treated in the septic tank body. It relates to a certain septic tank.

  Conventionally, septic tanks for treating human waste and domestic wastewater have formed a water treatment space inside the resin case for receiving biological treatment of raw water (human waste and domestic wastewater). Such a septic tank is usually used underground.

  The treated water biologically treated in the septic tank is discharged out of the tank through a discharge port provided in the septic tank. At this time, if the discharge destination is at a position higher than the height of the discharge outlet, the water to be treated cannot flow to the discharge destination under natural flow. In this case, a separate discharge pump tank is provided in parallel with the septic tank body, which is a case where a water treatment space is provided, and the water to be treated is once allowed to naturally flow down from the septic tank body to the discharge pump tank. The treated water was discharged to the discharge destination with pressure.

  This discharge pump tank may be partitioned in the septic tank body in advance, but when the septic tank body and the discharge pump tank are provided side by side as described above, they are formed separately from the septic tank body. The septic tank main body and the septic tank main body were installed side by side on a concrete base constructed in the basement, and the septic tank main body and the discharge pump tank were connected to each other through an outflow pipe.

  Thus, in the septic tank having the septic tank main body and the discharge pump tank, the septic tank main body and the discharge pump tank are connected in advance to the septic tank burial site for reasons such as facilitating construction. Was known.

As such a septic tank, Patent Document 1 has a configuration in which the discharge pump tank is separated from the upper surface of the floor plate on which the septic tank body is installed and is detachably connected to and supported by the septic tank body. It is disclosed.
Specifically, the discharge pump tank is detachably connected to the outside of the septic tank body with a mounting bracket. The mounting bracket is a joint between the upper mounting bracket (eye bolt, turnbuckle, connecting rod, etc.) connecting the manhole rising part provided in the septic tank body and the joint integrated flange formed at the top of the discharge pump tank, and the septic tank body. It is comprised with the lower attachment metal fitting which connects an integrated flange and the bottom part of a discharge pump tank. And the discharge pump tank is horizontally attached to the septic tank body by the upper and lower part mounting brackets.

  Patent Document 2 discloses a configuration of a septic tank in which a pedestal for mounting a discharge pump tank is attached to the discharge port side of the septic tank body.

  Since it becomes unnecessary to construct the foundation which installs a discharge pump tank by comprising as mentioned above, the construction at the time of septic tank embedding became easy.

JP 2002-248484 A (see claims, paragraph 0014, etc.)

Japanese Patent Laid-Open No. 2001-300567 (see claims and the like)

  In the septic tank disclosed in Patent Document 1, the attachment of the discharge pump tank and the lower mounting bracket is performed by inserting a bolt across the hole opened in the bottom of the discharge pump tank and the long hole opened in the lower mounting bracket, This is done by screwing a nut onto a bolt and fastening it.

  On the other hand, also in the septic tank disclosed in Patent Document 2, the pedestal for mounting the discharge pump tank is configured to be bolted to the septic tank body.

  In other words, the septic tanks disclosed in Patent Documents 1 and 2 fix the discharge pump tank to the septic tank body using complex members such as eyebolts, turnbuckles, connecting rods, or using a pedestal. For this reason, there is a problem that the number of parts increases and the assemblability when fixing the discharge pump tank to the septic tank body is poor.

  Moreover, the septic tank currently disclosed by these patent documents 1 and 2 uses the bolt in order to fix a discharge pump tank to a septic tank main body, and this bolt has penetrated the septic tank main body and the discharge pump tank. And since the through-hole of the volt | bolt is all below the water level of a to-be-processed water, even if waterproofing was performed to the location which the volt | bolt has penetrated and fixed, there existed a possibility of leaking from a through-hole.

Furthermore, in the septic tank disclosed in Patent Document 1, the upper mounting bracket for attaching the discharge pump tank to the septic tank body is fixed by hooking a connecting rod across the eye bolt on the septic tank body side and the eye bolt on the discharge pump tank side. However, the length of the connecting rod turnbuckle can be adjusted freely so that the discharge pump tank is horizontal.
Therefore, the upper mounting bracket is configured to be attached in a direction in which the discharge pump tank is pulled toward the septic tank body.
Here, the upper mounting bracket is attached to a manhole rising portion provided in the septic tank body. Usually, since the manhole is circular, the manhole rising portion is also configured to be circular when viewed from above. That is, since the upper mounting bracket is attached to the curved manhole rising portion by point fixing, the load of the discharge pump tank is concentrated on this point fixing portion. For this reason, there is a risk of deformation or breakage of the point fixing portion, and therefore, the upper mounting bracket is hardly a structure suitable for supporting most of the load of the discharge pump tank.

Therefore, the lower mounting bracket supports most of the load of the discharge pump tank. Since this lower mounting bracket is attached to the joint integrated flange of the septic tank body, the load of the discharge pump tank is applied to this joint integrated flange via the lower mounting bracket.
Here, in this joint integrated flange, since the upper tank and the lower tank of the septic tank main body are connected, when the load such as the discharge pump tank is applied, the joint is integrated and the integration of the joint integrated flange is released. As a result, there was a risk of water leakage. That is, it is not preferable to support most of the load of the discharge pump tank with the lower mounting bracket.

  Accordingly, it is an object of the present invention to provide a septic tank that can improve the assemblability when the discharge pump tank is attached to the septic tank body and prevent the treated water from leaking to the outside after installation.

(Configuration 1)
In order to achieve the above object, the first characteristic configuration of the septic tank according to the present invention is:
This is a septic tank provided with a septic tank body that forms a water treatment space for biological treatment in response to the inflow of raw water to be treated, and a discharge pump tank for discharging the treated water biologically treated in the septic tank body. And
The septic tank body has a manhole rising part, and has a substantially horizontal septic tank body shoulder formed between the manhole rising part and the side surface of the septic tank body,
One end side of each of a plurality of rod-like suspension members having rigidity is placed on the shoulder of the septic tank body so as to sandwich a manhole, and is brought into surface contact, and one end side of the suspension member is brought into surface contact with the septic tank body shoulder part. Fasten and fix at the side away from the discharge pump tank from the end, and fasten and fix the other end of the suspension member to the upper part of the discharge pump tank to support the load of the discharge pump tank upward in the vertical direction By doing so, the discharge pump tank is suspended and supported.

  Therefore, in the septic tank described in the first characteristic configuration of the present invention, the discharge pump tank is basically attached to the septic tank body by a member (for example, the suspension member shown in FIG. 1) that supports the suspension of the discharge pump tank. Since it can be supported, the discharge pump tank can be supported and fixed to the septic tank body with a simple configuration. Therefore, the assembly for supporting and fixing the discharge pump tank to the septic tank body can be easily performed.

Moreover, since the discharge pump tank is suspended and supported by the septic tank body, the load of the discharge pump tank can be supported upward in the vertical direction.
The septic tank body is generally formed by mating flanges formed at the ends of the upper and lower tanks. And when adopting an attachment method such that most of the load of the discharge pump tank is connected to the flange part of the septic tank body formed by mating the flanges formed at the end of each of the upper tank and the lower tank, There is a risk of leakage of water to be treated due to the flange portion being deformed and the pairing of the flange portion being released.
However, as in the present invention, when the discharge pump tank is suspended and supported on the septic tank body, that is, when the load of the discharge pump tank is supported upward in the vertical direction, the load of the discharge pump tank supported by the flange portion is small. Become. Therefore, since it is possible to prevent deformation due to a large part of the load of the discharge pump tank being connected to the flange portion of the septic tank body, leakage of water to be treated due to the release of the pair of flange portions. There is almost no fear.
Since the septic tank body shoulder is formed between the manhole rising part and the septic tank body side surface, the septic tank body usually has a substantially flat surface and a substantially horizontal surface. Since the suspension member is attached to the septic tank body shoulder, the surface can be fixed substantially horizontally to the septic tank body shoulder. That is, since the suspension member is not fixed to a circular curved surface such as a manhole rising portion, the load of the discharge pump tank can be dispersed and supported at a site where the suspension member and the septic tank body shoulder contact each other. Therefore, this structure becomes a structure suitable for suspending and supporting the load of the discharge pump tank by the suspension member.
Furthermore, since the suspension member can be fixed to the surface of the septic tank body shoulder, the discharge pump tank is caused by vibration generated when the septic tank with the discharge pump tank attached to the septic tank body is transported by a car or the like. Is difficult to move up and down in the vertical direction. Therefore, it is possible to prevent the attached state of the discharge pump tank from being loosened.
On the other hand, even if the septic tank body shoulder has a slightly curved shape, if the suspension member is a rod-shaped member (see FIGS. 1 to 3), it can be fixed at a plurality of points. The load of the discharge pump tank can be dispersed and supported. At this time, the suspension member is easy to fix because the curved surface of the shoulder portion of the septic tank body is gentle as compared to fixing the suspension member to a circular curved surface such as a manhole rising portion.
Moreover, if it is the septic tank of this invention, a suspension member can be fastened and fixed to a septic tank main body shoulder part using a general volt | bolt etc. as a means to fasten and fix, for example. Since such fixing is simple, the present configuration is excellent in assemblability.
At this time, it is conceivable that a through-hole is formed when the suspension member is fastened and fixed to the septic tank body shoulder, but normally, the water level of the treated water does not rise up to the septic tank body shoulder. For this reason, even if the through hole is provided in the septic tank body shoulder, there is no risk of leakage of the water to be treated.

(Configuration 2)
The second characteristic configuration of the septic tank according to the present invention is in addition to the first characteristic configuration described above,
One end side of the suspension member is fastened and fixed at a plurality of locations along the longitudinal direction of the suspension member in the vicinity of the manhole in the septic tank body shoulder .

(Configuration 3)
The third characteristic configuration of the septic tank according to the present invention is in addition to any one of the first and second characteristic configurations,
The other end of the suspension member is fastened and fixed near the center of the discharge pump tank in the longitudinal direction of the suspension member .

(Configuration 4)
The fourth characteristic configuration of the septic tank according to the present invention is in addition to any one of the first to third characteristic configurations,
A flange portion is provided on the outer periphery of the septic tank body, and a bottom rib portion is integrally provided on the outer bottom surface of the discharge pump tank.
The flange portion and the bottom rib portion are connected by a connecting member.

  That is, since the flange part of the septic tank body and the bottom rib part of the discharge pump tank are connected by the connecting member, the load of the discharge pump tank can be supported by the flange part of the septic tank body via the connecting member. . Therefore, in order to support the load of the discharge pump tank in an auxiliary manner, it is possible to reduce the load connected to the suspension member and the fixing portion of the suspension member (for example, the septic tank body shoulder).

At this time, the connecting member and the flange portion, and the connecting member and the bottom rib portion are connected. This connection is performed by, for example, providing a through hole in the flange portion or the bottom rib portion and fastening means such as a bolt.
That is, it is not necessary to connect and fix the discharge pump tank to the septic tank body by passing bolts through the side surfaces and bottom surface of the septic tank body and the discharge pump tank.
Therefore, if it is this structure, since it is not necessary to provide the through-hole for bolt fastening in the side surface and bottom face of a septic tank main body and a discharge pump tank, there is no possibility of leakage of to-be-processed water.

(Configuration 5)
In addition to the fourth feature configuration, the fifth feature configuration of the septic tank according to the present invention,
The connecting member is fixed to the flange portion at a plurality of locations.

Therefore, in the septic tank according to the fifth characteristic configuration of the present invention, since the connecting member can be bolted at a plurality of locations, the discharge pump tank is securely connected to the flange portion of the septic tank body via the connecting member. It becomes the structure which can be fixed to.
Furthermore, if it is the structure which can be bolt-fixed in multiple places, a connection member will have a wide dimension. For this reason, since it becomes easy to disperse and support the load of the discharge pump tank connected to the flange portion of the septic tank body via the connecting member, the flange portion can be reliably prevented from being deformed, and the pair of flange portions is released. Therefore, the risk of leakage of the water to be treated is further reduced.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the septic tank X of the present invention is provided with a case (septic tank body) 10 that forms a water treatment space for biological treatment by receiving inflow of raw water to be treated. Usually used underground. The septic tank body 10 constitutes an outer tank of the septic tank X by connecting an upper tank 11 having an inlet I into which treated water flows and a plurality of inspection openings H and a lower tank 12 having a septic tank bottom.

In the present embodiment, the two-divided type consisting of the upper tank 11 and the lower tank 12 is illustrated, but any of the three-divided types consisting of the upper tank, the lower tank, and the intermediate panel is applicable.
The septic tank X can be applied to a single septic tank that uses only human wastewater as a processing target wastewater, or a combined septic tank that can handle not only human wastewater but also household wastewater generated from the kitchen, laundry, bathroom, etc. as processing target wastewater.
Further, the septic tank X can be molded from, for example, a plastic resin such as FRP or a synthetic resin such as dicyclopentagen.

  The inside of the septic tank body 10 thus configured is partitioned by a plurality of partition plates. For example, from the upstream side, an anaerobic treatment tank (precipitation separation tank, contaminant removal tank, anaerobic filter bed tank first chamber, anaerobic filter bed tank second chamber, etc.), an aerobic treatment tank (carrier fluid tank, contact chamber). Each tank such as an air tank), a filtration tank, a sedimentation tank, and a disinfection tank is formed (not shown). It is also possible to provide a flow rate adjusting tank as necessary.

  Below the aerobic treatment tank, an air diffuser and a blower for sending air are arranged, so that the water to be treated can be treated under aerobic conditions. Moreover, the opening part H (manhole) and the manhole cover which block | closes it are provided so that the inside of each tank can be inspected from the upper side. The opening H opens to a manhole rising portion 13 provided in the upper tank 11.

Further, in the septic tank X of the present invention, the sterilized water to be sterilized in contact with the solid disinfectant in the sterilization tank flows down from the septic tank body 10 via the advection pipe J, and then temporarily stored and discharged. A discharge pump tank 20 to be discharged first is provided. The discharge pump tank 20 is provided with a pump P for discharging treated water to a discharge destination.
Below, the septic tank X of this invention which provided the septic tank main body 10 and the discharge pump tank 20 is explained in full detail.

A discharge pump tank 20 is suspended and supported on the septic tank body 10.
As shown in FIGS. 2 to 3, the suspension support is performed by, for example, a suspension member 30 that is a metal fitting having a L-shaped cross section and a bar shape. Since the suspension member 30 preferably has rigidity, the suspension member 30 is made of an ordinary material such as steel or stainless steel. Thus, the suspension member 30 applied in the present invention can support the discharge pump tank 20 on the septic tank body 10 with a simple configuration.
Therefore, the assembly for supporting and fixing the discharge pump tank 20 to the septic tank body 10 can be easily performed.

  Moreover, it is preferable to provide the suspending member 30 on both side surfaces of the septic tank X (see FIG. 3A).

As described above, the septic tank main body 10 is composed of the upper tank 11 and the lower tank 12, and the flange portion 16 is formed by mating the flanges formed at the respective end portions. When an attachment method is adopted in which most of the load of the discharge pump tank 20 is connected to the flange portion 16, leakage of water to be treated due to the flange portion 16 being deformed and the pairing of the flange portion 16 being released. There is a fear.
However, since the discharge pump tank 20 is suspended and supported by the septic tank body 10 in the configuration of the present invention, the load of the discharge pump tank 20 can be supported upward in the vertical direction, and the flange portion 16 supports. The load of the discharge pump tank 20 becomes small. Therefore, since the deformation | transformation by most of the load of the discharge pump tank 20 connecting with the flange part 16 of the septic tank main body 10 can be prevented beforehand, the to-be-processed water by canceling | releasing the pair of the flange part 16 There is almost no risk of water leakage.

  The suspension member 30 is attached to the septic tank body shoulder 15 formed between the manhole rising part 13 and the septic tank body side surface 14.

  Since the septic tank main body shoulder 15 is formed between the manhole rising part 13 and the septic tank main body side surface 14, the septic tank main body shoulder portion 15 is generally a substantially flat surface and a substantially horizontal surface. Since the suspension member 30 is attached to the septic tank body shoulder 15, the suspension member 30 can be fixed to the septic tank body shoulder 15 in a substantially horizontal plane. That is, since the suspension member 30 is not fixed to a circular curved surface such as a manhole rising portion, the load of the discharge pump tank 20 is dispersed and supported at a portion where the suspension member 30 and the septic tank body shoulder portion 15 are in surface contact. be able to. Therefore, the structure in which the suspension member 30 is attached to the septic tank body shoulder 15 is a structure suitable for hanging and supporting the load of the discharge pump tank 20 by the suspension member 30.

  Furthermore, since the suspension member 30 can be fixed to the surface of the septic tank body shoulder 15, the vibration generated when the septic tank X with the discharge pump tank 20 attached to the septic tank body 10 is transferred by a car or the like. Therefore, the discharge pump tank 20 is difficult to move up and down in the vertical direction. Therefore, it is possible to prevent the attached state of the discharge pump tank 20 from being loosened.

The suspension member 30 is fastened and fixed to the septic tank body shoulder 15.
Specifically, a bolt 50 or the like is applicable as a means for fastening and fixing. The fastening between the suspension member 30 exemplified by the L-shaped and rod-shaped metal fitting and the septic tank main body shoulder 15 is fixed such that the intrusion direction of the bolt 50 is a vertical direction, for example.

Thereby, since the suspending member 30 can be simply fixed to the septic tank main body shoulder 15 by fastening means such as a bolt 50, it is excellent in assemblability.
At this time, a through-hole that allows the bolt 50 to pass through the septic tank body shoulder 15 is formed, but the water level of the water to be treated does not normally rise up to the septic tank body shoulder 15. For this reason, even if the through-hole is provided in the septic tank body shoulder portion 15, there is no risk of leakage of water to be treated.
When fastening and fixing are performed at a plurality of locations, the discharge pump tank 20 becomes difficult to move due to vibrations or the like generated when the septic tank X is transferred by a car or the like. Can prevent

Also, the suspension member 30 and the discharge pump tank 20 can be fastened and fixed with bolts 50 or the like.
At this time, as shown in FIGS. 2 to 3, if the suspension member 30 is fastened and fixed at the top of the discharge pump tank 20 (that is, above the water level of the water to be treated), the bolt 50 is passed through the discharge pump tank 20. Even if the through hole is formed, there is no risk of leakage of the water to be treated.
Also in this case, it is preferable to perform fastening and fixing at a plurality of locations.
And the fastening with the suspension member 30 illustrated with the L-shaped cross-section metal fitting and the discharge pump tank 20 is fixed, for example, so that the intrusion direction of the bolt 50 is in the horizontal direction.

These through holes are formed above the water level of the water to be treated, but there is a risk that groundwater or the like may enter from the outside of the septic tank. Moreover, there exists a possibility that the various gas which may cause a bad odor may be generated by processing to-be-processed water in the water treatment space in a septic tank.
Therefore, it is preferable to perform a sealing process on the through-hole in order to prevent infiltration of groundwater or the like into the septic tank and leakage of gas generated in the septic tank to the outside of the septic tank.

As shown in FIGS. 1-3, the flange part 16 is provided in the outer periphery of the said septic tank main body 10. As shown in FIG. For example, the flange portion 16 may be formed by mating flanges formed at respective end portions of the upper tank 11 and the lower tank 12 constituting the exterior of the septic tank body 10.
Furthermore, a bottom rib portion 21 is provided on the outer bottom surface of the discharge pump tank 20.
The bottom rib portion 21 can be shaped along the outer periphery of the bottom surface of the discharge pump tank 20, but is not limited thereto. For example, as shown in FIG. 5, a form having a linear cross section (FIG. 5 (a)), a form in which two bottom face rib portions 21 having a straight cross section (FIG. 5 (b)), and the like are applicable. is there. It is also possible to provide such ribs on the side surfaces.
The flange portion 16 and the bottom rib portion 21 are connected by a connecting member 40. As shown in FIG. 4 and the like, the connecting member 40 is preferably exemplified by a metal fitting having a cross-sectional L shape and a bar shape. Since the connecting member 40 preferably has rigidity, the connecting member 40 is made of a material such as a normal steel material or stainless steel.
The method of attaching the connecting member 40 having the L-shaped cross section is based on the positional relationship between the flange portion 16 and the bottom rib portion 21, for example, when the flange portion 16 is positioned below the bottom rib portion 21 (FIGS. 1 to 3 and FIG. 4). (A)) Or, when it is positioned above (FIG. 4B), various changes can be made.
In addition to the L-shaped cross section, as shown in FIG. 6, the shape is substantially along the side surface of the discharge pump tank 20, and at this time, the receiving portion 41 that receives the bottom rib portion 21 is provided. Is possible.

  That is, since the flange part 16 of the septic tank body 10 and the bottom rib part 21 of the discharge pump tank 20 are connected by the connecting member 40, the load of the discharge pump tank 20 is applied to the septic tank body 10 via the connecting member 40. It is supported by the flange portion 16. Therefore, in order to support the load of the discharge pump tank 20 supplementarily, the burden connected to the suspension member 30 and the fixing | fixed part (purification tank main body shoulder part 15) of the suspension member 30 can be reduced.

At this time, the connecting member 40 and the flange portion 16 and the connecting member 40 and the bottom rib portion 21 are connected. For example, as shown in FIG. 4, the coupling is performed by providing a through hole in the flange portion 16 or the bottom rib portion 21 and fastening means such as a bolt 50.
That is, for example, it is not necessary to connect and fix the discharge pump tank 20 to the septic tank body 10 by passing the bolts 50 through the side surfaces and the bottom surface of the septic tank body 10 and the discharge pump tank 20.
Therefore, if it is this structure, since it is not necessary to provide the through-hole for a bolt fastening in the side surface and bottom face of the purification tank main body 10 and the discharge pump tank 20, there is no possibility of leakage of to-be-processed water.

  Moreover, it is preferable that the connecting member 40 is fixed to the flange portion 16 at a plurality of locations.

The fixing of the connecting member 40 to the flange portion 16 is preferably fastening and fixing with a bolt 50 or the like, for example. At this time, if it is the structure which can be bolt-fixed in several places, the discharge pump tank 20 will become a structure which can be reliably fixed to the flange part 16 of the septic tank main body 10 via the connection member 40.
Furthermore, if it is the structure which can be bolt-fixed in multiple places, the connection member 40 will have a wide dimension. For this reason, since it becomes easy to disperse and support the load of the discharge pump tank 20 connected to the flange part 16 of the septic tank body 10 via the linking member 40, the deformation of the flange part 16 can be reliably prevented. The risk of leakage of the water to be treated due to the cancellation of the pairing is further reduced.

Side schematic view of the septic tank of the present invention Schematic diagram of the main part of the septic tank of the present invention The principal part perspective view of the septic tank of this invention Perspective view of main part of discharge pump tank Schematic showing another form of bottom rib part of discharge pump tank Schematic showing another form of connecting member

Explanation of symbols

10 Septic tank body 20 Discharge pump tank X Septic tank

Claims (5)

This is a septic tank provided with a septic tank body that forms a water treatment space for biological treatment in response to the inflow of raw water to be treated, and a discharge pump tank for discharging the treated water biologically treated in the septic tank body. And
The septic tank body has a manhole rising part, and has a substantially horizontal septic tank body shoulder formed between the manhole rising part and the side surface of the septic tank body,
One end side of each of a plurality of rod-like suspension members having rigidity is placed on the shoulder of the septic tank body so as to sandwich a manhole, and is brought into surface contact, and one end side of the suspension member is brought into surface contact with the septic tank body shoulder part. Fasten and fix at the side away from the discharge pump tank from the end, and fasten and fix the other end of the suspension member to the upper part of the discharge pump tank to support the load of the discharge pump tank upward in the vertical direction A septic tank in which the discharge pump tank is suspended and supported. The septic tank according to claim 1, wherein one end side of the suspending member is fastened and fixed at a plurality of locations along the longitudinal direction of the suspending member in the vicinity of the manhole in the shoulder of the septic tank main body. The septic tank according to any one of claims 1 and 2, wherein the other end side of the suspension member is fastened and fixed in the vicinity of the center of the discharge pump tank in the longitudinal direction of the suspension member. A flange portion is provided on the outer periphery of the septic tank body, and a bottom rib portion is integrally provided on the outer bottom surface of the discharge pump tank.
The septic tank as described in any one of Claims 1-3 which has connected the said flange part and the said bottom face rib part with the connection member.   The septic tank according to claim 4, wherein the connecting member is fixed to the flange portion at a plurality of locations.

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