JP6300598B2 - Attaching structure of water tank and discharge pump tank to septic tank - Google Patents

Description

The present invention relates to a water tank that can be attached to a septic tank , and more particularly to a discharge pump tank that is attached to a septic tank that biologically treats water to be treated. Moreover, this invention relates to the attachment structure to the septic tank of a discharge pump tank.

  Conventionally, in ordinary households, human urine and domestic wastewater are sometimes treated by a septic tank buried underground. Such a septic tank has a water treatment space for biological treatment in response to the inflow of raw water to be treated, such as human waste and domestic wastewater, and the biologically treated water to be treated is provided in the septic tank. It is comprised so that it may flow out of a tank from a discharge port.

However, depending on the local installation standards and topographic conditions, for example, when 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 by natural flow. In such a case, a discharge pump tank that is separate from the septic tank is installed on the concrete base constructed underground to install the septic tank, and the outlet of the septic tank and the inlet of the discharge pump tank are provided. The treated water is once allowed to naturally flow down from the septic tank to the discharge pump tank through the pipe to be connected, and the treated water is pumped to the discharge destination by a pump provided in the discharge pump tank.
When installing a discharge pump tank in the septic tank, for the purpose of facilitating the construction, the work to fix the discharge pump tank to the foundation by attaching the discharge pump tank to the side of the septic tank at a position floating from the foundation. It is unnecessary.

  For example, in Patent Document 1, a discharge pump tank is connected and supported to the septic tank via an upper mounting member and a lower mounting member in a state of floating from the upper surface of the floor plate on which the septic tank is installed outside the septic tank. Is disclosed. In particular, the attachment of the discharge pump tank and the lower mounting member is performed by inserting a bolt through a hole opened in the bottom of the discharge pump tank and a long hole opened in the lower mounting member, and screwing a nut into the bolt. It is concluded.

  In Patent Document 2, the upper part of the discharge pump tank is fixed to a suspension member extending laterally from the septic tank shoulder between the inspection opening and the septic tank side surface of the septic tank, and the flange part of the septic tank, The structure which fixes the bottom face rib part arrange | positioned at the lower end of a discharge pump tank by fastening with a volt | bolt etc. via a connection member is disclosed.

JP 2002-248484 A Japanese Patent Laying-Open No. 2005-095755

  However, in the fixation of the septic tank and the discharge pump tank disclosed in Patent Document 1, since the bolt hole is formed penetrating below the water level of the water to be treated in the septic tank and the discharge pump tank, the bolt hole causes water leakage and There was a risk of damage due to deterioration of the strength of the material. Moreover, when attaching a discharge pump tank to a septic tank, the operation | work which tightens the volt | bolt inside a discharge pump tank was required.

  Further, in fixing the septic tank and the discharge pump tank disclosed in Patent Document 2, a connecting member is separately required, which causes an increase in cost, and the connecting work of the connecting member is complicated.

  Accordingly, an object of the present invention is to provide a water tank that improves the workability when the water tank is attached to the object to be attached and has no risk of leakage after the attachment.

A first characteristic configuration of a water tank according to the present invention is a water tank that can be attached to a septic tank, and a flange part that can be directly joined to a septic tank flange part provided on the outer surface of the septic tank is integrated with an outer surface part of the water tank. It is in the point provided for.

The flange portion of the tank, the septic tank flange portion provided on the outer surface of the septic tank, without using a separate mounting member, such as a conventional, can be bonded directly. In addition, the flange part of a water tank may be provided above the outer surface part, may be provided below, may be provided both above and below, or may be provided between above and below.

Further, since there is no need to form a bolt hole through the outer wall of the water tank, there is no need for a waterproofing process or a rustproofing process for fixing the water tank to the septic tank , and there is a risk of water leakage from the bolt hole. Absent. Moreover, the operation | work which tightens a volt | bolt inside a water tank becomes unnecessary .

The second characteristic configuration is that the lower surface of the flange portion can be joined to the septic tank flange portion .

The flange part of a water tank and the to-be-joined part of a septic tank flange part can be joined more reliably.

  The third characteristic configuration is that a concave portion is provided in the outer surface portion, and the flange portion is provided in the concave portion.

By providing the flange portion in the concave portion disposed on the outer surface portion, the base end side is disposed flush with the outer surface portion as in the conventional case, and the end edge side greatly extends outward from the outer surface portion. Compared to the flange portion, for example, during storage until the water tank is attached, during transportation, and in the operation of attaching the water tank, the possibility of hitting and damaging the flange portion is reduced.
In addition, the bolt or nut for fixing the flange portion to the attached object can be disposed in the recess to prevent the bolt or nut from falling off.

  Furthermore, the to-be-attached part of the said to-be-attached object and the flange part with which the recessed part of the said water tank was equipped can be fixed with a volt | bolt and a nut. Since the flange portion of the water tank is not configured to extend outward from the outer surface portion to the outside, the distance between the attached object and the facing surface of the water tank can be reduced, and the installation space for that portion can be reduced. Space saving can be achieved. The moment for supporting the water tank is also reduced.

  The fourth characteristic configuration is that the lower surface of the flange portion constitutes a part of the outer bottom surface portion of the water tank, and the upper surface of the flange portion constitutes the bottom surface portion of the recess.

  By disposing the flange portion on the outer bottom surface of the water tank, the attachment work from below the water tank becomes easy.

  The fifth characteristic configuration is that a rib is suspended from the top surface portion of the recess, and a predetermined gap is provided between the lower end portion of the rib and the upper surface of the flange portion.

  When the bolt hole is formed through the flange portion from the lower surface side to the upper surface side, after the tip of the drill penetrates the flange portion, the possibility that the top surface portion of the concave portion may penetrate through the flange portion is prevented. Can do.

The sixth characteristic configuration is a structure for attaching the discharge pump tank to the septic tank, and the septic tank has a septic tank flange on the outer surface by mating flanges respectively disposed at the end portions of the upper tank and the lower tank. The discharge pump tank is provided with a flange portion protruding in the horizontal direction on the outer surface of the discharge pump tank, and the discharge pump tank is disinfected by disinfecting the septic tank by fixing the flange section to the septic tank flange section. It exists in the point which is the attachment structure to the septic tank of the discharge pump tank characterized by attaching to the tank side .

  An example of the water tank is a discharge pump tank. The assembling property when the discharge pump tank is attached to the septic tank is improved, and the possibility of water leakage after the attachment can be eliminated.

  As described above, according to the present invention, it is possible to improve the workability when attaching the water tank to the attachment, and to provide a water tank that does not have a possibility of water leakage after the attachment.

Schematic side view of a purification facility in which a discharge pump tank according to the present invention is attached to a septic tank Schematic sectional view of a purification facility in which a discharge pump tank according to the present invention is attached to a septic tank Schematic perspective view of purification equipment in which a discharge pump tank according to the present invention is attached to a septic tank Schematic perspective view of purification equipment in which a discharge pump tank according to the present invention is attached to a septic tank The perspective view of the 1st housing | casing part which comprises the discharge pump tank by this invention. The perspective view of the 1st housing | casing part which comprises the discharge pump tank by this invention. Explanatory drawing of the outer surface part side of the 1st housing | casing part which comprises the discharge pump tank by this invention. Explanatory drawing of the inner surface part side of the 1st housing | casing part which comprises the discharge pump tank by this invention. Schematic explanatory drawing of the concave part of the discharge pump tank and the flange part of the septic tank according to the present invention Explanatory drawing of the attachment to the septic tank of the discharge pump tank by this invention Assembly explanatory diagram of the discharge pump tank according to the present invention Explanatory drawing of the bottom part of the discharge pump tank by this invention

Embodiments of the present invention will be described below with reference to the drawings.
The purification equipment 100 is shown in FIGS. The purification facility 100 is a single septic tank that treats only human wastewater as treated water discharged from ordinary households, and wastewater generated from kitchens, laundry, bathrooms, etc. as well as human wastewater as treated water. Takes the form of a combined septic tank that can be treated as wastewater to be treated. Usually, such a purification equipment 100 is installed on a concrete foundation constructed underground. In each figure, the description of the ground or concrete foundation is omitted.

  The purification facility 100 includes a purification tank 10 and a discharge pump tank 20. The discharge pump tank 20 is attached to the outer surface portion of the septic tank 10 in a state of floating from the foundation. In addition, in this embodiment, the water tank by this invention is the discharge pump tank 20, and a to-be-attached object is the septic tank 10 to which the discharge pump tank 20 is attached.

The septic tank 10 is a tank into which raw water to be treated is introduced and biologically treated in an internal water treatment space and then discharged to the outside.
It has an inlet (not shown) for inflowing the raw water, an outlet 13 for discharging biologically treated water, an upper tank 11 having a plurality of inspection openings 14 and the like, and a septic tank bottom. The lower tank 12 is connected by a flange portion 15. The upper tank 11 and the lower tank 12 are each made of, for example, a plastic resin such as FRP or a synthetic resin such as dicyclopentagen. In the present embodiment, the septic tank 10 is described as an example of a two-divided type consisting of an upper tank 11 and a lower tank 12, but may be a three-divided type consisting of an upper tank, a lower tank, and an intermediate panel.

  The inside of the septic tank 10 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 is formed (not shown) such as an air tank), a filtration tank, a sedimentation tank, and a disinfection tank. In addition, it is also possible to provide a flow rate adjusting tank as necessary.

  The discharge pump tank 20 is a tank provided when the discharge destination of the water to be treated treated in the septic tank 10 is at a position higher than the height of the discharge port 13 of the septic tank 10.

  The discharge pump tank 20 is provided with a first housing part 30 in which an inlet 21 to which the advection pipe 16 is connected and an outlet 22 to which a discharge pipe of the pump P installed therein is connected. The second housing portion 40 is connected to the flange portions 31 and 41, and has an appearance in which the inspection opening 23 is disposed on the top surface portion. Two pumps P are arranged inside, the rising pipe 17a of each discharge pipe 17 is connected by a header pipe 17b, and the junction pipe 17c is connected to the outlet port 22. The treated water sterilized in the sterilization tank of the septic tank 10 is once introduced into the discharge pump tank 20 from the discharge port 13 via the advection pipe 16 and is pumped to the discharge destination by one of the two pumps P. Is done.

The first housing unit 30 and the second housing unit 40 are each made of, for example, a plastic resin such as FRP or a synthetic resin such as dicyclopentagen.
Since the discharge pump tank 20 has a two-part configuration in which the half-shaped first housing part 30 and the second housing part 40 are combined, the first housing part 30 and the second housing part 40 are pressed for manufacturing. Molding and injection molding can be suitably employed, and mass production becomes possible. Here, the SMC molding method will be described as an example of the press molding method, but the same applies to other press molding methods and injection molding methods.

  The 1st housing | casing part 30 and the 2nd housing | casing part 40 are shape | molded using the same metal mold | die. By molding the first housing part 30 and the second housing part 40 using the same mold, the discharge pump tank 20 can be made cheaper due to the mass production effect. Since the first housing unit 30 and the second housing unit 40 have basically the same shape, in the following description, the first housing unit 30 and the second housing unit 40 need not be distinguished from each other. About only the 1st housing | casing part 30 is demonstrated on behalf of both.

The first casing 30 is molded by pressurizing and heating a saturated polyester resin sheet such as FRP between a pair of molds.
As shown in FIGS. 5 to 8, the first housing portion 30 has a half shape in which the first flange portion 31 is provided around the first opening portion 32. Therefore, the second housing part 40 also has a half-shape in which the second flange part 41 having a shape corresponding to the first flange part 31 is provided around the second opening part 42 (see FIG. 1).

First, based on FIG.5 and FIG.7, the structure of the outer surface part 30a of the 1st housing | casing part 30 is demonstrated.
Concave portions 33 are disposed at two locations on the left and right sides of the lower end portion of the outer surface portion 30a facing the first opening 32 in the outer surface portion 30a of the discharge pump tank 20. The recess 33 is provided with a flange portion 34. The flange portion 34 protrudes in the horizontal direction from the outer surface portion 30a. In the present embodiment, the flange portion 34 is disposed in a direction perpendicular to the surface of the first opening 32. The lower surface of the flange portion 34 constitutes a part of the peripheral edge of the outer bottom surface portion 35 of the discharge pump tank 20, and the upper surface of the flange portion 34 constitutes the bottom surface portion of the recess 33. A rib 36 is suspended from the top surface portion of the concave portion 34, and is configured to have a predetermined gap between the lower end portion of the rib 36 and the upper surface of the flange portion 34.

  The concave portion 33, the flange portion 34, and the rib 36 are integrally provided on the outer surface portion 30 a of the first housing portion 30 when the first housing portion 30 is molded by the SMC molding method. The outer side surface portion 30a, the outer bottom surface portion 35, the concave portion 33, the flange portion 34, and the rib 36 of the first housing portion 30 are provided with a draft angle so that they can be smoothly removed from the mold, and further have no undercut. Yes. Therefore, immediately after the SMC press molding of the first housing portion 30, the flange portion 34 is not provided with a bolt hole 37 (see FIG. 9) for inserting a bolt, but the bolt hole is formed by post-processing. By forming 37, it becomes possible to fix to the flange part 15 of the septic tank 10 by fastening means such as bolts.

  For the formation of the bolt hole 37, an electric tool, for example, an electric drill, is preferably used because of the simplicity of the machining operation. An operator forms the flange portion 34 through the bolt hole 37 from the lower surface side by an electric drill. At the time of forming this penetration, the resistance force until then is lost at the moment when the drill tip of the electric drill penetrates the upper surface of the flange portion 34, and the drill may be pushed too much. Even in such a case, the tip of the drill is received by the rib 36 suspended from the top surface of the recess 33. Therefore, there is no risk of accidentally penetrating the top surface of the recess 33.

  Thus, by providing the flange portion 34 in the recess 33 disposed on the outer surface portion 30a, the proximal end side is disposed flush with the outer surface portion, and the edge side is outward from the outer surface portion, as in the prior art. Compared to the flange portion that extends greatly to the first housing portion, for example, before the first housing portion 30 and the second housing portion 40 are combined until the discharge pump tank 20 is attached, or the first housing portion. In the state of storing and transporting and attaching the discharge pump tank 20 in a state in which the 30 and the second casing portion 40 are combined, the possibility that the flange portion 34 is hit and damaged is reduced.

  Further, by disposing the flange portion 34 at the peripheral edge portion of the outer bottom surface portion 35 of the discharge pump tank 20, particularly when the discharge pump tank 20 is fixed to the purification tank 10 in a state of floating from the foundation, the discharge pump tank 20. The bolt 70 can be easily tightened from below (see FIGS. 9 and 10).

  As shown in FIGS. 9 and 10, when the flange portion 34 is fixed to the flange portion 15 of the septic tank 10, the nut 71 can be disposed in the recess 33 to prevent the dropout. The nut 71 is configured to include a flange 72 that comes into contact with the wall surface of the recess 33. When the bolt 70 is tightened, the nut 71 is brought into contact with the wall surface of the recess 33, so that the nut 71 rotates around. Is prevented.

  Since the flange portion 34 does not have a configuration in which the edge side greatly extends outward from the outer surface portion 30a of the first housing portion 30, the distance between the opposing surfaces of the septic tank 10 and the discharge pump tank 20 can be reduced. Therefore, the installation space can be saved. Furthermore, the moment for supporting the discharge pump tank 20 is also reduced.

Next, based on FIG.6 and FIG.8, the structure of the inner surface part 30b of the 1st housing | casing part 30 is demonstrated.
As shown in FIG. 8, in the upper center of the inner side surface portion 30 b of the first housing portion 30, a groove portion 21 a that serves as a guideline for forming the inflow port 21 and a groove portion that serves as a guideline for forming the outflow port 22. 22a is disposed.

By cutting away the wall surface of the first housing 30 along the groove 21a, the inlet 21 can be easily formed at a predetermined position. Similarly, the outlet 22 can be easily formed at a predetermined position by cutting the wall surface of the first housing 30 along the groove 22a. That is, workability in post-processing is improved by arranging the grooves 21a and 22a according to the shapes of the inlet 21 and the outlet 22 in advance when the first casing 30 is molded. In the present embodiment, the inflow port 21 is formed in the first housing portion 30, and the outflow port 22 is formed in the second housing portion 40.
The inflow port 21 and the outflow port 22 are not each one type, and it is possible to form an inflow port and an outflow port corresponding to the diameter of the advection pipe 16 according to the inflow amount and the diameter of the merging pipe 17c according to the discharge amount of the pump. It is also possible to dispose a plurality of grooves for the purpose.

  In addition, a groove portion 38a that serves as a guide when forming the air vent is disposed on the upper left side when viewed from the inner side surface portion 30b of the first housing portion 30. As with the inlet 21 and outlet 22 described above, air venting can be easily formed by post-processing.

  Further, the first flange portion 31 is provided with a groove portion 39a that serves as a guide when forming a plurality of bolt holes 39 along the periphery. The bolt hole 39 through which the bolt for connecting the first flange portion 31 and the second flange portion 41 is inserted can be easily formed without positioning. Further, a groove portion 31 a for arranging a seal is provided on the contact surface of the first flange 31, particularly the second flange portion 41.

A first recess 52 a is disposed along the lower end of the first opening 32 on the inner bottom surface portion 51 of the inner side surface portion 30 b of the first housing portion 30.
Further, the inner side surface portion 30b of the first housing portion 30 is provided with pump restricting portions 53a and 54a at the upper end of the first concave portion 52a disposed in the inner bottom surface portion 51a, which is lower left and right when viewed from the front. doing.

  The pump regulating portions 53a and 54a are integrally provided on the inner side surface portion 30b of the first housing portion 30 when the first housing portion 30 is molded by the SMC molding method. The inner side surface portion 30b, the inner bottom surface portion 51a, the first concave portion 52a, and the pump regulating portions 53a and 54a of the first housing portion 30 are provided with draft angles so that they can be smoothly removed from the mold, and further have no undercut. It has become.

  The upper end of the second recess 52b disposed on the inner bottom surface portion 51b of the inner side surface portion 40b of the second housing portion 40 is opposed to the pump regulating portions 53a and 54a of the first housing portion 30. The pump regulating portions 53b and 54b are projected. When the first housing portion 30 and the second housing portion 40 are combined, a pair of pump restriction portions 53 (53a, 53b) and a pair of pump restriction portions 54 (54a, 54b) are configured. . That is, in this embodiment, two pairs of pump restricting portions 53 (53a, 53b) and 54 (54a, 54b) are provided, but the pump restricting portion is used as the inner side surface portion 30b of the first housing portion 30. The structure provided in the center lower part of front view may be sufficient. In this case, only one pair of pump restricting portions is disposed at the center.

  As shown in FIG. 11, in order to combine the first housing portion 30 and the second housing portion 40, after applying an adhesive made of a seal to the groove portion 31 a disposed in both the flange portions 31, 41. Both flange portions 31 and 41 are opposed to each other, and bolts and nuts are fastened to the bolt holes 39 of both flanges 31 and 41. Thereafter, the adhesive solidifies and becomes a packing.

  As shown in FIG. 12, when the first housing part 30 and the second housing part 40 are combined, the pump P depends on the space defined by the first housing part 30 and the second housing part 40. An installation space for disposing the space is configured. Furthermore, the space defined by the first recess 52a and the second recess 52b can be used as the sand reservoir 52 of the pump P.

  When the suction port of the pump P is disposed facing the sand reservoir 52 in the installation space partitioned by the first housing portion 30 and the second housing portion 40 combined in this manner, the inner surface of the sand reservoir 52 The portion of the impeller casing of the pump P can be clamped by the pair of pump restricting portions 53 (53a, 53b) or the pair of pump restricting portions 54 (54a, 54b) located at the upper end on the side, and the direction in which the pump P is pinched Movement against is restricted. Further, it does not interfere with the suction of water from the suction portion 18 provided on the lower surface of the impeller casing.

In the present embodiment, the discharge pump tank 20 is provided with two pumps P. The two pumps P disposed in the discharge pump tank 20 are sandwiched between the pair of pump restricting portions 53 (53a, 53b) or the pair of pump restricting portions 54 (54a, 54b), respectively. Movement is restricted. Therefore, it is not necessary to separately provide a bracket for fixing the pump P. Since it is not necessary to penetrate through the bolt hole for attaching the bracket to the discharge pump tank 20, there is no possibility of leakage from the bolt hole.
Since the pump P can be carried into the burial site in a state where the pump P is previously disposed in the discharge pump tank 20, the work of disposing the pump P in the discharge pump tank on the site is not necessary.

  By the way, the pump regulating portions 53a and 53b are provided with scale portions 56a and 56b that can be adjusted according to the size of the pump P. Similarly, the pump regulating portions 54a and 54b are provided with scale portions 57a and 57b. When molding the first housing part 30 and the second housing part 40, the pump restriction parts 53a, 54a and 53b, 54b are molded longer, and according to the size of the pump P to be installed, particularly the size of the impeller casing. The distance between the pair of pump restricting portions 53 (53a, 53b) and the pair of pumps while taking the distance indicated by the scale portion 56 (56a, 56b) and the scale portion 57 (57a, 57b) as a guide. The distance between the regulating parts 54 (54a, 54b) can be adjusted by post-processing such as cutting.

  Further, as shown in FIG. 11, the inner side surface portion 30 b of the first housing portion 30 is provided with a discharge pipe regulating portion 55 at the upper left and right in the front view. The discharge pipe regulating portion 55 is also provided integrally with the inner side surface portion 30b of the first housing portion 30 when the first housing portion 30 is molded by the SMC molding method. The discharge pipe regulating portion 55 is provided with a draft angle so that it can be smoothly removed from the mold, and has a shape with no undercut.

The discharge pipe regulating portion 55 is disposed at a position corresponding to the height of the outlet 22. The lower end of the discharge pipe 17 is connected to the discharge portion of the pump P, and the curved pipe 17d at the upper end of the riser pipe 17a is close to the discharge pipe restriction portion 55, whereby vertical movement is restricted. There is no need to provide a separate bracket for fixing the piping.
The discharge pipe regulating portion 55 is provided with a scale portion 58 indicating the height of the discharge pipe regulating portion 55, and the discharge portion is discharged while taking the scale portion 58 as a guide according to the handling of the discharge pipe 17 of the installed pump P. The height of the lower end portion of the pipe regulating portion 55 can be adjusted by post-processing such as cutting.

Next, attachment of the discharge pump tank 20 to the septic tank 10 will be described.
According to the discharge pump tank 20 according to the present invention, the upper part of the discharge pump tank 20 is attached to the purification tank 10 via a pair of left and right suspension members 80 with respect to the attachment to the purification tank 10. A part of the weight of the discharge pump tank 20 is supported by the pair of suspension members 80.

The suspension member 80 is a metal fitting having rigidity, and preferably used is a processed flat plate of normal steel or stainless steel.
One end of the suspension member 80 is fixed to the septic tank shoulder 19 on the side of the inspection opening 14, and the other end is bent into an L shape and fixed to the flanges 31 and 41 of the discharge pump tank 20. .
Specifically, a bolt or the like is applicable as means for fixing the suspension member 80. The fastening of the suspension member 80 and the septic tank shoulder 19 is fixed so that, for example, the two bolts enter the horizontal direction.

Thereby, since the suspension member 80 can be easily fixed to the septic tank shoulder 19 by fastening a bolt or the like, it is excellent in assemblability.
At this time, a bolt hole for a bolt is formed through the septic tank shoulder 19, but normally the water level of the water to be treated does not rise up to the septic tank shoulder 19. For this reason, even if the septic tank shoulder 19 is provided with a bolt hole, there is no risk of leakage of the water to be treated.

A bolt or the like is also used for fastening the suspension member 80 and the flange portions 31 and 41 of the discharge pump tank 20.
At this time, as shown in FIGS. 1, 3 and 4, if the suspension member 80 is fixed by the flange portions 31 and 41 of the discharge pump tank 20, it is not necessary to penetrate the bolt hole in the discharge pump tank 20. . Therefore, there is no risk of leakage of the treated water.

As described above, the septic tank 10 includes the upper tank 11 and the lower tank 12, and the flange portion 15 is configured by mating the flanges disposed at the respective end portions.
At the lower part of the discharge pump tank 20, the flange part 34 of the recessed part 33 is attached to the flange part 15 of the septic tank 10. A part of the weight of the discharge pump tank 20 is supported by the flange portion 15.
As shown in FIGS. 9 and 10, the flange portion 15 and the flange portion 34 are fixed by bolts 70 and nuts 71.
In the present embodiment, two concave portions 33 are disposed on the left and right sides, that is, two flange portions 34 are disposed, so that the lower portion of the discharge pump tank 20 is fixed to the flange portion 15 at two locations. Become.

  Since the flange part 34 provided in the discharge pump tank 20 can be directly joined to the flange part 15 of the septic tank 10, there is no need for a separate mounting member for fixing the lower part of the discharge pump tank 20 as in the prior art. Become.

  Accordingly, it is not necessary to penetrate through a bolt hole for attaching the attachment member to the lower part of the discharge pump tank 20, and a bolt waterproofing process and a rust prevention process for fixing the discharge pump tank 20 to the septic tank 10 are unnecessary. Moreover, there is no risk of water leakage from the bolt hole. Moreover, the operation | work which tightens a volt | bolt inside the discharge pump tank 20 becomes unnecessary.

  Moreover, since the flange part 34 is not the shape extended greatly from the outer surface part 30a of the discharge pump tank 20, it can be attached in the state which the outer surface part 30a of the discharge pump tank 20 and the side surface of the purification tank 10 contacted. The load of the discharge pump tank 20 can be dispersed and supported by this contact surface. Furthermore, the discharge pump tank 20 is difficult to move up and down in the vertical direction due to vibrations or the like generated when the purification equipment 100 with the discharge pump tank 20 attached to the purification tank 10 is transferred by a car or the like. Therefore, it is possible to prevent the attached state of the discharge pump tank 20 from being loosened.

In the above-described embodiment, the configuration in which the discharge pump tank 20 as a water tank according to the present invention is attached to the septic tank 10 as an attached object is described, but the attached object is not limited to the septic tank 10.
For example, the pump tank support part arrange | positioned by the concrete foundation in which the septic tank 10 is installed may be sufficient.
Examples of the pump tank support portion include an anchor bolt driven into the foundation and an installation base fixed to the anchor bolt. Even if the inner bottom portion of the discharge pump tank is not flat, the discharge pump tank 20 can be easily made independent by fixing the installation base to the flange portion 34. Further, the attachment object may be a floating prevention metal fitting.

Moreover, you may arrange | position the recessed part 33 and the flange part 34 above the outer surface part 30a of the discharge pump tank 20. FIG. In this case, the ceiling of the space in which the discharge pump tank 20 is disposed and the bolts suspended from the ceiling constitute an attached object, and the discharge pump tank 20 can be suspended from the ceiling. Moreover, you may arrange | position the recessed part 33 and the flange part 34 in both the upper direction of the outer surface part 30a of the discharge pump tank 20, and the downward direction. Moreover, you may arrange | position the recessed part 33 and the flange part 34 in the center of the height direction of the outer surface part 30a of the discharge pump tank 20. FIG. Further, the flange portion 34 is not limited to be arranged in a horizontal posture, and may be arranged in a vertical posture in the recess 33.
Moreover, the water tank by this invention is not restricted to a discharge pump tank. For example, a water tank such as a water supply tank in which no pump is disposed may be used.

  Each of the above-described embodiments is an example of the present invention, and the present invention is not limited by the description. The specific configuration of each part can be appropriately changed and designed within the range where the effects of the present invention are exhibited. is there.

10: Septic tank (attachment)
15: Flange part (joined part)
20: Discharge pump tank (water tank)
30a: outer side surface portion 33: concave portion 34: flange portion 35: outer bottom surface portion 36: rib

Claims (6)

A water tank that can be attached to a septic tank ,
A water tank, wherein a flange part that can be directly joined to a septic tank flange part provided on an outer surface of the septic tank is integrally provided on an outer surface part of the water tank. The water tank according to claim 1, wherein a lower surface of the flange part can be joined to the septic tank flange part .   The water tank according to claim 1 or 2, wherein a concave portion is provided in the outer surface portion, and the flange portion is provided in the concave portion. The lower surface of the flange portion constitutes a part of the outer bottom surface portion of the water tank,
The water tank according to claim 3, wherein an upper surface of the flange portion constitutes a bottom surface portion of the concave portion. Ribs are provided vertically on the top surface of the recess,
The water tank according to claim 4, wherein a predetermined gap is provided between a lower end portion of the rib and an upper surface of the flange portion. A structure for mounting the discharge pump tank to the septic tank,
The septic tank has a septic tank flange portion formed on the outer surface by pairing flanges respectively disposed at the ends of the upper tank and the lower tank.
The outer surface of the discharge pump tank is provided with a flange projecting in the horizontal direction,
A structure for attaching the discharge pump tank to the septic tank, wherein the discharge pump tank is attached to the sterilization tank side of the septic tank by fixing the flange part to the septic tank flange part.

Images